> Quick answer: The research indicates that there is no unified end-of-line testing protocol to verify integrated operation of a solar lamp’s PIR sensor, photocell, and LED driver together [1][23]. Testing typically occurs at the component level rather than as a system-level verification.
End-of-line (EOL) testing is crucial for ensuring that solar lamps function correctly before they reach consumers. However, the available research does not specify a single, standardized EOL protocol that verifies the integrated operation of the PIR sensor, photocell, and LED driver [1][23]. This article delves into the current state of EOL testing for these components.
Individual Component Testing
While there is no unified end-to-line test protocol, individual components can indeed be tested effectively. TÜV Rheinland offers comprehensive services that ensure every system component—from solar modules to luminaires—meets compliance and quality standards [1][2]. Intertek’s Mobile PV Testcenter provides on-site testing for photovoltaic (PV) modules using electroluminescence imaging, power measurements (IV curves), insulation testing, and infrared imaging, all of which are relevant to assessing component health [14].
Photocell Functionality
The photocell plays a critical role in preventing the lamp from turning on during daylight. In one system, the photocell’s signal is part of a control circuit that requires both low ambient light (darkness) and motion detection before activating the lamp [23]. Another patent describes using solar panel voltage to simulate ambient light conditions for testing purposes [20].
PIR Sensor Operation
The PIR sensor detects movement by sensing changes in infrared radiation. When triggered, it increases the lamp’s brightness [12][21]. The sensor operates on minimal current (about 10 microwatts) and is designed to work with low voltage from a rechargeable battery [23]. A test signal can be supplied during testing intervals without causing illumination, which could help verify lamp failure conditions [9][18].
LED Driver Performance
The LED driver includes current or voltage sensing devices for power supply regulation [15] and is controlled by stored waveforms or constant values based on spectral conformity [4][6]. A failure detection circuit monitors current draw against an expected profile to detect faults [7][8][11]. These systems suggest that driver performance can be assessed through measurements under load, but not in a full system test.
Modular Testing Approach
The testing approach for solar lamps appears to be modular: components are tested individually, and system-level functionality is inferred from component performance. For example, one patent describes monitoring aggregate LED intensity against a norm like a fraction of one sun and alerting if performance deviates [4][6].
System-Level Monitoring
System-level performance can be monitored through metrics such as light output or current draw [4][6][7][8][11]. However, these methods do not describe how the sensor inputs are properly triggering the response. The sources also do not cover any environmental or operational simulation during end-of-line testing.
Environmental and Operational Simulation
The absence of environmental or operational simulation in EOL testing is a notable gap. While some systems log granular operational data such as temperature, humidity, and sunshine duration [10], and others simulate solar spectra [24], these are not described as part of end-of-line quality control.
Self-Testing Operations
Automatic self-testing operations during operation are described in several patents, but they do not cover pre-shipment verification. The idea of a “self-test” during production is implied but not operationalized in the excerpts.
Comparison Table: Testing Methods
| Component | Test Method |
|––––|––––––––––––-|
| Photocell | Simulating ambient light conditions [20] |
| PIR Sensor | Monitoring infrared radiation changes [12][21] |
| LED Driver | Measuring current or voltage under load [7][8][11] |
Key Takeaways
- There is no unified end-of-line testing protocol for verifying integrated solar lamp components.
- Individual components are tested separately, with system-level functionality inferred from component performance.
- Environmental and operational simulation during EOL testing is not described in the sources.
References
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# Solar Street Light Testing Services Source: Blog/Web URL: https://www.tuv.com/bahrain/en/solar-street-light-testing-certification.html Author: TÜV Rheinland Date: 2026-01-01 Compliance and quality with solar street and home light system testing Solar street light systems represent a smart investment in environmental sustainability and public safety. They also consist of numerous components, each of which contributes to the proper functioning and durability of the system as a whole. Customers demand a guarantee that their investment will pay off, while regulatory authorities require that solar systems conform to certain quality standards. Our testing and certification services for solar street lighting systems provide both a proof of quality and compliance. We are able to test every system component – from solar module to luminaires. Our long standing partnership with the solar industry has helped establish our reputation as an impartial third-party expert in maintaining high quality standards for solar energy products. Especially for India, where the certification of solar street lights is mandatory, we are accredited by BIS (Bureau of Indian Standards) for Solar PV modules used for the Street Light System. Contact a solar expert to learn more. Evaluation for complete solar street light system for a competitive edge The services we offer for solar street lights provide you with proof of quality lacking in many products in this sector. Our test reports issued after is evalua
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# Solar Street Light Testing Services Source: Blog/Web URL: https://www.tuv.com/albania/en/solar-street-light-testing-certification.html Author: TÜV Rheinland Date: 2026-01-01 Compliance and quality with solar street and home light system testing Solar street light systems represent a smart investment in environmental sustainability and public safety. They also consist of numerous components, each of which contributes to the proper functioning and durability of the system as a whole. Customers demand a guarantee that their investment will pay off, while regulatory authorities require that solar systems conform to certain quality standards. Our testing and certification services for solar street lighting systems provide both a proof of quality and compliance. We are able to test every system component – from solar module to luminaires. Our long standing partnership with the solar industry has helped establish our reputation as an impartial third-party expert in maintaining high quality standards for solar energy products. Especially for India, where the certification of solar street lights is mandatory, we are accredited by BIS (Bureau of Indian Standards) for Solar PV modules used for the Street Light System. Contact a solar expert to learn more. Evaluation for complete solar street light system for a competitive edge The services we offer for solar street lights provide you with proof of quality lacking in many products in this sector. Our test reports issued after is evalua
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the solar panel at the time is then measured to determine the solar panel's characteristics and quality. At the same time the system according to this invention may monitor its sensor system 202 and compare the aggregate LED intensity performance to a predetermined norm 204, such as a desired fraction of the intensity of one sun. If that standard is not met an alert may be provided of an actual failure or of a failure trend, so that the power may be adjusted as necessary or LEDs or sub-blocks of LEDs may be replaced. In the run mode the system no longer operates as an optically closed loop; instead the LED-string current sense signals 118 are now used to slave the LED serial string current drivers 102 to predetermined either constant values or stored waveforms 96, as determined by the desired degree of spectral conformity with the ASTM standard. The totalized signals of the photodiode sensors 28 of e.g. a quarter tile, can be used to monitor the total light intensity produced by the quarter tile. Although specific features of the invention are shown in some drawings and not in others, this is for convenience only as each feature may be combined with any or all of the other features in accordance with the invention. The words “including”, “comprising”, “having”, and “with” as used herein are to be interpreted broadly and comprehensively and are not limited to any physical interconnection. Moreover, any embodiments disclosed in the subject application are not to be taken as the
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provided to the LEDs to illuminate the solar cell or solar panel under test 200 , typically for 100 ms of discharge and 10 seconds of recharge. – the current vs. voltage output of the solar panel at the time is then measured to determine the solar panel's characteristics and quality. – the system according to this invention may monitor its sensor system 202 and compare the aggregate LED intensity performance to a predetermined norm 204 , such as a desired fraction of the intensity of one sun. If that standard is not met an alert may be provided of an actual failure or of a failure trend, so that the power may be adjusted as necessary or LEDs or sub-blocks of LEDs may be replaced. – the system no longer operates as an optically closed loop; instead the LED-string current sense signals 118 are now used to slave the LED serial string current drivers 102 to predetermined either constant values or stored waveforms 96 , as determined by the desired degree of spectral conformity with the ASTM standard. – the totalized signals of the photodiode sensors 28 of e.g. a quarter tile, can be used to monitor the total light intensity produced by the quarter tile. Landscapes – Physics & Mathematics (AREA) – General Physics & Mathematics (AREA) – Spectroscopy & Molecular Physics (AREA) – Life Sciences & Earth Sciences (AREA) – Sustainable Development (AREA) – Engineering & Computer Science (AREA) – General Engineering & Computer Science (AREA) – Optics & Photonics (AREA) – Circuit Arrangement
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# Led lamp failure detection circuit and method Source: Blog/Web URL: https://patents.google.com/patent/WO2019090066A1/en Author: Date: 2018-11-02 WO2019090066A1 – Led lamp failure detection circuit and method – Google Patents Led lamp failure detection circuit and method Download PDFInfo – Publication number – WO2019090066A1 WO2019090066A1 PCT/US2018/058945 US2018058945W WO2019090066A1 WO 2019090066 A1 WO2019090066 A1 WO 2019090066A1 US 2018058945 W US2018058945 W US 2018058945W WO 2019090066 A1 WO2019090066 A1 WO 2019090066A1 – Authority – WO – WIPO (PCT) – Prior art keywords – test voltage – current draw – led – profile – expected – Prior art date – Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) – Ceased Links Classifications – – G—PHYSICS – G01—MEASURING; TESTING – G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES – G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere – G01R31/44—Testing lamps – – G—PHYSICS – G01—MEASURING; TESTING – G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES – G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not
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# LED lamp failure detection circuit and method Source: Blog/Web URL: https://patents.google.com/patent/US11156670B2/en Author: Date: 2018-11-02 US11156670B2 – LED lamp failure detection circuit and method – Google Patents LED lamp failure detection circuit and method Download PDFInfo – Publication number – US11156670B2 US11156670B2 US16/179,358 US201816179358A US11156670B2 US 11156670 B2 US11156670 B2 US 11156670B2 US 201816179358 A US201816179358 A US 201816179358A US 11156670 B2 US11156670 B2 US 11156670B2 – Authority – US – United States – Prior art keywords – current draw – test voltage – led – profile – expected – Prior art date – Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) – Expired – Fee Related, expires Links Images Classifications – – G—PHYSICS – G01—MEASURING; TESTING – G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES – G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere – G01R31/44—Testing lamps – – G—PHYSICS – G01—MEASURING; TESTING – G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES – G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is be
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signal lights, are involved. Briefly, the above and further objects of the present invention are realized by providing a new and improved lamp failure detection apparatus, which includes a device for interrupting the electrical energy supplied to the lamp during a testing interval of time. A testing device generates a low level test signal and supplies it during the testing interval to the lamp for testing purposes without causing the lamp to provide illumination. Another device responds to the test signal indicating a failure condition of the lamp and generates a failure condition signal, which may be used to either indicate the failure condition to attendants or to energize a standby lamp. The apparatus of the present invention can test both a primary lamp and a standby lamp. The lamp testing is an automatic self-testing operation and thus is not dependent on a human operator. The failure indication signal may be used to illuminate a neon lamp to provide a clear and unmistakable signal of the fault condition. Both the primary and standby lamps can have neon failure indicating lamps so that there is no mistake as to which lamp failed. The neon lamps are very reliable and not ordinarily subject to failures themselves. The electronic switching from the primary to the standby lamp upon failure of the primary lamp is performed rapidly to avoid interruption of service in an automatic manner without human intervention and without wear-susceptible moving parts, such as relays. Othe
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at ground level) and off-device (e.g., security gate and sensor fence.) – 1.1.4 Granular operational and environmental data logging to correlate solar collection and charge characteristics as a function of location and environmental information (e.g., average daily sunshine, temperature, pressure, humidity.) – 1.1.5 Algorithms for determining when and how much energy to invert back onto the grid as a function of device operational and environmental parameters. – 1.1.6 Algorithms for minimizing energy consumption as a function of device operational and environmental parameters as well as sensor triggers like photo cell and motion. – 1.1.7 A separable solar engine kit that includes solar collector, charge controller, energy storage, delivery and wireless monitoring backhaul; along with all the connectors—mechanical, electrical & software/firmware interface—to enable third parties to install our solar engine on other types of devices. 1.2 Light Delivery Stack (SeeFIG. 30 ) – 1.2.1 Delineate light delivery into distinct layers with unique parameters that can be independently adjusted to meet overall intensity and shape requirements cost effectively. – 1.2.2 A whole-luminaire, high efficiency lens that integrates diffusion technology for smoothing light distribution where there are hotspots with Fresnel lens technology to direct light at precise wide angles to achieve standard IES luminaire distribution types I thru V and sufficient environmental protection to achieve IP65/66 appr
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regulate light-source brightness to the brightest, reach current illumination object, when object leaves investigative range, infrared sensor again sends a signal to controller and light-source brightness is adjusted to power save mode. Described street lamp body is by lamp stand, arm, lamp holder, built-in fitting forms, and contiguous solar panel place, lamp stand top connects arm, arm end is connected with lamp holder, lamp stand is hollow structure, and lamp stand upper end is fixed with infrared sensor, and lower end cavity internal fixtion has controller, lamp stand is fixed on the ground by ground built-in fitting, has battery in built-in fitting. Described solar panel is single-crystalline-silicon solar-cell panel. Described solar panel slant setting. Described infrared sensor is placed on lamp stand. Beneficial effect The invention has the beneficial effects as follows: distinguish common solar street light, when on road surface without Pedestrians and vehicles through out-of-date, light is adjusted to electricity-saving state automatically, can cannot charge at reply cloudy day of longer time, effectively save the energy; When having pedestrian or vehicle to enter infrared sensor investigative range, infrared sensor transmits signals to controller, and its brightness is increased, facilitates Pedestrians and vehicles process, the energy both saved by this new type solar energy street lamp, does not also affect Pedestrians and vehicles through out-of-date brightness
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# Mobile Photovoltaic (PV) Field Testing Source: Blog/Web URL: https://www.intertek.com/solar/mobile/ Author: Date: 2025-09-05 Our Mobile PV Testcenter provides solution for photovoltaic (PV) module testing in the field Underperforming PV modules can bring down the energy output of a whole solar installation, but shipping modules out for testing can risk further damage and be time-consuming. As part of our full suite of Renewable Energy Field Services, Intertek offers a comprehensive on-site testing solution with our Mobile PV Testcenter. No shipping necessary—the lab comes to you. Our mobile testing laboratory’s expertly developed capabilities offer solar system site owners and operators the ability to identify, evaluate, and replace under-performing modules on site, at the installation. Learn more about Intertek's Mobile PV Testcenter Download our Fact Sheet The Mobile PV Testcenter provides in-depth analysis in the field for: – Electroluminescence (EL) Imaging – Power measurements (IV curves) – Insulation testing – Infrared (IR) imaging – And more The accuracy of the testing and measurement is designed and optimized for the requirements of on-site PV module assessment, offering immediate combined system measurement. In addition to the capabilities offered by the Mobile PV Testcenter, Intertek provides solution-oriented testing services and programs for PV modules and solar products, including certification. Our electrical safety testing and certification services can help
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to as load. The LED drivers 4504 may further include various input and output current or voltage sensing devices that sense the flow of current or supplied voltage across input and output terminals for regulating the power supply. The LED drivers 4504 may further be coupled with input and output protection devices such as fuses that may cut off the supply of current at the input and output terminals of the power circuitry upon detection of an overflow of current beyond a threshold level by sensing devices. The architecture may also include sensors 4508 that may be disposed at various locations such as within the lighting fixtures, within the environment like parking area, vehicle and the like or integrated with the controlling units or management systems 134 and the like. The sensors 4508 may include occupancy sensors, ambience light sensors, Radio Frequency Identification Devices (RFID) operable against RFID tags, sensing cameras, metering devices and the like. Further, the sensors 4508 may operate based on various physical, environmental or chemical parameters such as but not limited to temperature, pressure, lighting, touch, smell, voice, perception and the like. Similarly, various other devices that operate on behavior metrics or biometric measurements such as finger impressions, thumb impressions, walking style, handshake and the like may be utilized to facilitate sensing of environmental or contextual patterns. The depicted architecture may also include databases for st
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present invention is to provide such a new and improved lamp failure detection apparatus which is relatively inexpensive to manufacture, and which is powered by a source of alternating current, so that the apparatus can be powered from conventional power lines without need for excessive and expensive installations of special power lines where widely disbursed stand-alone lighting systems, such as traffic signal lights, are involved. – a new and improved lamp failure detection apparatus which includes a device for interrupting the electrical energy supplied to the lamp during a testing interval of time. – a testing device generates a low level test signal and supplies it during the testing interval to the lamp for testing purposes without causing the lamp to provide illumination. – Another device responds to the test signal indicating a failure condition of the lamp and generates a failure condition signal, which may be used to either indicate the failure condition to attendants or to energize a standby lamp. – the apparatus of the present invention can test both a primary lamp and a standby lamp. – the lamp testing is an automatic self-testing operation and thus is not dependent on a human operator. – the failure indication signal may be used to illuminate a neon lamp to provide a clear and unmistakable signal of the fault condition. – Both the primary and standby lamps can have neon failure indicating lamps so that there is no mistake as to which lamp failed. – the neon lamp
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as head lamp, branch lamp, ironware lamp, street lamp, by setting protection board in power module, the light-operated electricity set on protection board Road is connected with the solar panels in power module, and the break-make of the protection circuit on protection board is controlled according to the voltage of solar panels, The effect of photosensitive switch is substituted, the function of power-off on daytime night automatic opening is realized, makes solar energy radar sensing lamp during the day Only battery is charged and remaining circuit does not produce power consumption, greatly reduce the power consumption of solar energy radar sensing lamp, have simultaneously There are relatively low cost, energy-conserving and environment-protective, efficiency of energy utilization is high, reliability is high, installation is simple and convenient. Preferably, the Radar Detection module 20 includes radar signal/receiver 21 and signal amplifier 22, described Radar signal/receiver 21 is connected with the signal amplifier 22, and the signal amplifier 22 connects with the control module Connect 30. When it is implemented, as shown in Fig. 2 radar signal/receiver 21 be used for launch and receive radar signal, and will The Radar Signal Transmission received to signal amplifier 22, signal amplifier 22 transmitted after being amplified to the signal received to Control module 40, Treatment Analysis is carried out to the radar signal received by control module 40, judges whethe
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sensor starts, by Signal transmissions to controller, regulate light-source brightness to the brightest, reach current illumination object, when object leaves investigative range, infrared sensor again sends a signal to controller and light-source brightness is adjusted to power save mode. 2. a kind of new type solar energy street lamp according to claim 1, it is characterized in that: described street lamp body by lamp stand, arm, lamp holder, built-in fitting forms, contiguous solar panel place, lamp stand top connects arm, and arm end is connected with lamp holder, and lamp stand is hollow structure, lamp stand upper end is fixed with infrared sensor, lower end cavity internal fixtion has controller, and lamp stand is fixed on the ground by ground built-in fitting, has battery in built-in fitting. 3. a kind of new type solar energy street lamp according to claim 1, is characterized in that: described solar panel slant setting. 4. a kind of new type solar energy street lamp according to claim 1, is characterized in that: described infrared sensor is placed on lamp stand. 5. a kind of new type solar energy street lamp according to claim 1, is characterized in that: described solar panel is single-crystalline-silicon solar-cell panel. Priority Applications (1) Applications Claiming Priority (1) Publications (1) Family ID=53412581 Family Applications (1) Country Status (1) Cited By (4) – 2013 – 2013-12-11 CN CN201310667494.4A patent/CN104713016A/en active Pending
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of the detector. – the approach or movement of the object typically changes the thermal or long wavelength radiation 52 sensed by the detector which results in an electric signal which can be amplified by amplifier 60. – the PIR sensor (detector) is preferably arranged as described in U.S. Pat. No. 3,958,118 issued to the inventor hereof with a lens system 54 which focuses the infrared rays on the detector 50. – the PIR sensor uses a minimal amount of current (power consumption of about 10 microwatts) and is designed to operate on the low voltage supplied by the rechargeable battery. Indeed, in U.S. Pat. No. – the signal output by the PIR detector 50 is amplified by amplifier 60, and fed to the light control logic and timing circuit 70. – Light control logic and timing circuit 70 preferably includes the resistance of the photocell 80 as a part of a control circuit which functions to prevent the system from turning on lamp 40 unless the dual requirements of low background light level (i.e darkness) sensed by the photocell 80, and the detection of a moving object sensed by PIR detector 50 are met. In this manner, the battery charge is maintained, as charge is not wasted by lighting lamp 40 during the daytime. – the adjustable timer 74 part of the light control logic and timing circuit 70 which is indicated as a potentiometer, but which may take any of numerous forms well known in the arts, is utilized to limit the drain on battery 30. – timer 74 closes the circuit between the b
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the past, the sun simulators used in labs consisted of bulbs (e.g., Xenon) but within the last few years, they have moved to Light Emitting Diodes (LED). These industrial sun simulators are not optimized, or practical, for human health purposes and are too expensive for such use. – The present invention is comprised of a solar spectrum radiation device that simulates the sun's electro-magnetic energy (EM) representing the full solar spectrum measured at earth's sea level. The device will provide the correct wavelengths (nm), irradiance (W/m2), and illuminance (LUX). – The solar spectrum projection of the device is fully automated in accordance with the time of the day, time of the year, altitude, and location. In preferred embodiments, the device's illumination source can be housed in either a ceiling-mounted fixture, standing floor/desk lamp, wall panels, or Edison screw bulbs. In some configurations, the light source can consist, but is not limited to, Light Emitting Diodes (LEDs) whereas each LED represents a at least one specific wavelength that can be individually controlled to turn on/off and regulate the irradiance levels. Multiple LEDs of different wavelengths, combined, will represent the simulated solar spectrum as measured upon the Earth's surface. The device can either be controlled by pre-programmed instructions and/or by manual end-user input. It can also be part of an Internet of Things (IoT) cloud-based platform to receive input from solar EM meters located ar
# Solar Street Light Testing Services Source: Blog/Web URL: https://www.tuv.com/bahrain/en/solar-street-light-testing-certification.html Author: TÜV Rheinland Date: 2026-01-01 Compliance and quality with solar street and home light system testing Solar street light systems represent a smart investment in environmental sustainability and public safety. They also consist of numerous components, each of which contributes to the proper functioning and durability of the system as a whole. Customers demand a guarantee that their investment will pay off, while regulatory authorities require that solar systems conform to certain quality standards. Our testing and certification services for solar street lighting systems provide both a proof of quality and compliance. We are able to test every system component – from solar module to luminaires. Our long standing partnership with the solar industry has helped establish our reputation as an impartial third-party expert in maintaining high quality standards for solar energy products. Especially for India, where the certification of solar street lights is mandatory, we are accredited by BIS (Bureau of Indian Standards) for Solar PV modules used for the Street Light System. Contact a solar expert to learn more. Evaluation for complete solar street light system for a competitive edge The services we offer for solar street lights provide you with proof of quality lacking in many products in this sector. Our test reports issued after is evalua
# Solar Street Light Testing Services Source: Blog/Web URL: https://www.tuv.com/albania/en/solar-street-light-testing-certification.html Author: TÜV Rheinland Date: 2026-01-01 Compliance and quality with solar street and home light system testing Solar street light systems represent a smart investment in environmental sustainability and public safety. They also consist of numerous components, each of which contributes to the proper functioning and durability of the system as a whole. Customers demand a guarantee that their investment will pay off, while regulatory authorities require that solar systems conform to certain quality standards. Our testing and certification services for solar street lighting systems provide both a proof of quality and compliance. We are able to test every system component – from solar module to luminaires. Our long standing partnership with the solar industry has helped establish our reputation as an impartial third-party expert in maintaining high quality standards for solar energy products. Especially for India, where the certification of solar street lights is mandatory, we are accredited by BIS (Bureau of Indian Standards) for Solar PV modules used for the Street Light System. Contact a solar expert to learn more. Evaluation for complete solar street light system for a competitive edge The services we offer for solar street lights provide you with proof of quality lacking in many products in this sector. Our test reports issued after is evalua
the solar panel at the time is then measured to determine the solar panel's characteristics and quality. At the same time the system according to this invention may monitor its sensor system 202 and compare the aggregate LED intensity performance to a predetermined norm 204, such as a desired fraction of the intensity of one sun. If that standard is not met an alert may be provided of an actual failure or of a failure trend, so that the power may be adjusted as necessary or LEDs or sub-blocks of LEDs may be replaced. In the run mode the system no longer operates as an optically closed loop; instead the LED-string current sense signals 118 are now used to slave the LED serial string current drivers 102 to predetermined either constant values or stored waveforms 96, as determined by the desired degree of spectral conformity with the ASTM standard. The totalized signals of the photodiode sensors 28 of e.g. a quarter tile, can be used to monitor the total light intensity produced by the quarter tile. Although specific features of the invention are shown in some drawings and not in others, this is for convenience only as each feature may be combined with any or all of the other features in accordance with the invention. The words “including”, “comprising”, “having”, and “with” as used herein are to be interpreted broadly and comprehensively and are not limited to any physical interconnection. Moreover, any embodiments disclosed in the subject application are not to be taken as the
provided to the LEDs to illuminate the solar cell or solar panel under test 200 , typically for 100 ms of discharge and 10 seconds of recharge. – the current vs. voltage output of the solar panel at the time is then measured to determine the solar panel's characteristics and quality. – the system according to this invention may monitor its sensor system 202 and compare the aggregate LED intensity performance to a predetermined norm 204 , such as a desired fraction of the intensity of one sun. If that standard is not met an alert may be provided of an actual failure or of a failure trend, so that the power may be adjusted as necessary or LEDs or sub-blocks of LEDs may be replaced. – the system no longer operates as an optically closed loop; instead the LED-string current sense signals 118 are now used to slave the LED serial string current drivers 102 to predetermined either constant values or stored waveforms 96 , as determined by the desired degree of spectral conformity with the ASTM standard. – the totalized signals of the photodiode sensors 28 of e.g. a quarter tile, can be used to monitor the total light intensity produced by the quarter tile. Landscapes – Physics & Mathematics (AREA) – General Physics & Mathematics (AREA) – Spectroscopy & Molecular Physics (AREA) – Life Sciences & Earth Sciences (AREA) – Sustainable Development (AREA) – Engineering & Computer Science (AREA) – General Engineering & Computer Science (AREA) – Optics & Photonics (AREA) – Circuit Arrangement
# Led lamp failure detection circuit and method Source: Blog/Web URL: https://patents.google.com/patent/WO2019090066A1/en Author: Date: 2018-11-02 WO2019090066A1 – Led lamp failure detection circuit and method – Google Patents Led lamp failure detection circuit and method Download PDFInfo – Publication number – WO2019090066A1 WO2019090066A1 PCT/US2018/058945 US2018058945W WO2019090066A1 WO 2019090066 A1 WO2019090066 A1 WO 2019090066A1 US 2018058945 W US2018058945 W US 2018058945W WO 2019090066 A1 WO2019090066 A1 WO 2019090066A1 – Authority – WO – WIPO (PCT) – Prior art keywords – test voltage – current draw – led – profile – expected – Prior art date – Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) – Ceased Links Classifications – – G—PHYSICS – G01—MEASURING; TESTING – G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES – G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere – G01R31/44—Testing lamps – – G—PHYSICS – G01—MEASURING; TESTING – G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES – G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not
# LED lamp failure detection circuit and method Source: Blog/Web URL: https://patents.google.com/patent/US11156670B2/en Author: Date: 2018-11-02 US11156670B2 – LED lamp failure detection circuit and method – Google Patents LED lamp failure detection circuit and method Download PDFInfo – Publication number – US11156670B2 US11156670B2 US16/179,358 US201816179358A US11156670B2 US 11156670 B2 US11156670 B2 US 11156670B2 US 201816179358 A US201816179358 A US 201816179358A US 11156670 B2 US11156670 B2 US 11156670B2 – Authority – US – United States – Prior art keywords – current draw – test voltage – led – profile – expected – Prior art date – Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) – Expired – Fee Related, expires Links Images Classifications – – G—PHYSICS – G01—MEASURING; TESTING – G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES – G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere – G01R31/44—Testing lamps – – G—PHYSICS – G01—MEASURING; TESTING – G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES – G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is be
signal lights, are involved. Briefly, the above and further objects of the present invention are realized by providing a new and improved lamp failure detection apparatus, which includes a device for interrupting the electrical energy supplied to the lamp during a testing interval of time. A testing device generates a low level test signal and supplies it during the testing interval to the lamp for testing purposes without causing the lamp to provide illumination. Another device responds to the test signal indicating a failure condition of the lamp and generates a failure condition signal, which may be used to either indicate the failure condition to attendants or to energize a standby lamp. The apparatus of the present invention can test both a primary lamp and a standby lamp. The lamp testing is an automatic self-testing operation and thus is not dependent on a human operator. The failure indication signal may be used to illuminate a neon lamp to provide a clear and unmistakable signal of the fault condition. Both the primary and standby lamps can have neon failure indicating lamps so that there is no mistake as to which lamp failed. The neon lamps are very reliable and not ordinarily subject to failures themselves. The electronic switching from the primary to the standby lamp upon failure of the primary lamp is performed rapidly to avoid interruption of service in an automatic manner without human intervention and without wear-susceptible moving parts, such as relays. Othe
at ground level) and off-device (e.g., security gate and sensor fence.) – 1.1.4 Granular operational and environmental data logging to correlate solar collection and charge characteristics as a function of location and environmental information (e.g., average daily sunshine, temperature, pressure, humidity.) – 1.1.5 Algorithms for determining when and how much energy to invert back onto the grid as a function of device operational and environmental parameters. – 1.1.6 Algorithms for minimizing energy consumption as a function of device operational and environmental parameters as well as sensor triggers like photo cell and motion. – 1.1.7 A separable solar engine kit that includes solar collector, charge controller, energy storage, delivery and wireless monitoring backhaul; along with all the connectors—mechanical, electrical & software/firmware interface—to enable third parties to install our solar engine on other types of devices. 1.2 Light Delivery Stack (SeeFIG. 30 ) – 1.2.1 Delineate light delivery into distinct layers with unique parameters that can be independently adjusted to meet overall intensity and shape requirements cost effectively. – 1.2.2 A whole-luminaire, high efficiency lens that integrates diffusion technology for smoothing light distribution where there are hotspots with Fresnel lens technology to direct light at precise wide angles to achieve standard IES luminaire distribution types I thru V and sufficient environmental protection to achieve IP65/66 appr
# LED lamp fault detection circuit and method Source: Blog/Web URL: https://patents.google.com/patent/CN111670369B/en Author: Date: 2018-11-02 CN111670369B – LED lamp fault detection circuit and method – Google Patents LED lamp fault detection circuit and method Download PDFInfo – Publication number – CN111670369B CN111670369B CN201880084978.7A CN201880084978A CN111670369B CN 111670369 B CN111670369 B CN 111670369B CN 201880084978 A CN201880084978 A CN 201880084978A CN 111670369 B CN111670369 B CN 111670369B – Authority – CN – China – Prior art keywords – test voltage – led – current consumption – profile – voltage levels – Prior art date – Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) – Expired – Fee Related Links Images Classifications – – G—PHYSICS – G01—MEASURING; TESTING – G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES – G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere – G01R31/44—Testing lamps – – G—PHYSICS – G01—MEASURING; TESTING – G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES – G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being t
regulate light-source brightness to the brightest, reach current illumination object, when object leaves investigative range, infrared sensor again sends a signal to controller and light-source brightness is adjusted to power save mode. Described street lamp body is by lamp stand, arm, lamp holder, built-in fitting forms, and contiguous solar panel place, lamp stand top connects arm, arm end is connected with lamp holder, lamp stand is hollow structure, and lamp stand upper end is fixed with infrared sensor, and lower end cavity internal fixtion has controller, lamp stand is fixed on the ground by ground built-in fitting, has battery in built-in fitting. Described solar panel is single-crystalline-silicon solar-cell panel. Described solar panel slant setting. Described infrared sensor is placed on lamp stand. Beneficial effect The invention has the beneficial effects as follows: distinguish common solar street light, when on road surface without Pedestrians and vehicles through out-of-date, light is adjusted to electricity-saving state automatically, can cannot charge at reply cloudy day of longer time, effectively save the energy; When having pedestrian or vehicle to enter infrared sensor investigative range, infrared sensor transmits signals to controller, and its brightness is increased, facilitates Pedestrians and vehicles process, the energy both saved by this new type solar energy street lamp, does not also affect Pedestrians and vehicles through out-of-date brightness
# Mobile Photovoltaic (PV) Field Testing Source: Blog/Web URL: https://www.intertek.com/solar/mobile/ Author: Date: 2025-09-05 Our Mobile PV Testcenter provides solution for photovoltaic (PV) module testing in the field Underperforming PV modules can bring down the energy output of a whole solar installation, but shipping modules out for testing can risk further damage and be time-consuming. As part of our full suite of Renewable Energy Field Services, Intertek offers a comprehensive on-site testing solution with our Mobile PV Testcenter. No shipping necessary—the lab comes to you. Our mobile testing laboratory’s expertly developed capabilities offer solar system site owners and operators the ability to identify, evaluate, and replace under-performing modules on site, at the installation. Learn more about Intertek's Mobile PV Testcenter Download our Fact Sheet The Mobile PV Testcenter provides in-depth analysis in the field for: – Electroluminescence (EL) Imaging – Power measurements (IV curves) – Insulation testing – Infrared (IR) imaging – And more The accuracy of the testing and measurement is designed and optimized for the requirements of on-site PV module assessment, offering immediate combined system measurement. In addition to the capabilities offered by the Mobile PV Testcenter, Intertek provides solution-oriented testing services and programs for PV modules and solar products, including certification. Our electrical safety testing and certification services can help
to as load. The LED drivers 4504 may further include various input and output current or voltage sensing devices that sense the flow of current or supplied voltage across input and output terminals for regulating the power supply. The LED drivers 4504 may further be coupled with input and output protection devices such as fuses that may cut off the supply of current at the input and output terminals of the power circuitry upon detection of an overflow of current beyond a threshold level by sensing devices. The architecture may also include sensors 4508 that may be disposed at various locations such as within the lighting fixtures, within the environment like parking area, vehicle and the like or integrated with the controlling units or management systems 134 and the like. The sensors 4508 may include occupancy sensors, ambience light sensors, Radio Frequency Identification Devices (RFID) operable against RFID tags, sensing cameras, metering devices and the like. Further, the sensors 4508 may operate based on various physical, environmental or chemical parameters such as but not limited to temperature, pressure, lighting, touch, smell, voice, perception and the like. Similarly, various other devices that operate on behavior metrics or biometric measurements such as finger impressions, thumb impressions, walking style, handshake and the like may be utilized to facilitate sensing of environmental or contextual patterns. The depicted architecture may also include databases for st
present invention is to provide such a new and improved lamp failure detection apparatus which is relatively inexpensive to manufacture, and which is powered by a source of alternating current, so that the apparatus can be powered from conventional power lines without need for excessive and expensive installations of special power lines where widely disbursed stand-alone lighting systems, such as traffic signal lights, are involved. – a new and improved lamp failure detection apparatus which includes a device for interrupting the electrical energy supplied to the lamp during a testing interval of time. – a testing device generates a low level test signal and supplies it during the testing interval to the lamp for testing purposes without causing the lamp to provide illumination. – Another device responds to the test signal indicating a failure condition of the lamp and generates a failure condition signal, which may be used to either indicate the failure condition to attendants or to energize a standby lamp. – the apparatus of the present invention can test both a primary lamp and a standby lamp. – the lamp testing is an automatic self-testing operation and thus is not dependent on a human operator. – the failure indication signal may be used to illuminate a neon lamp to provide a clear and unmistakable signal of the fault condition. – Both the primary and standby lamps can have neon failure indicating lamps so that there is no mistake as to which lamp failed. – the neon lamp
as head lamp, branch lamp, ironware lamp, street lamp, by setting protection board in power module, the light-operated electricity set on protection board Road is connected with the solar panels in power module, and the break-make of the protection circuit on protection board is controlled according to the voltage of solar panels, The effect of photosensitive switch is substituted, the function of power-off on daytime night automatic opening is realized, makes solar energy radar sensing lamp during the day Only battery is charged and remaining circuit does not produce power consumption, greatly reduce the power consumption of solar energy radar sensing lamp, have simultaneously There are relatively low cost, energy-conserving and environment-protective, efficiency of energy utilization is high, reliability is high, installation is simple and convenient. Preferably, the Radar Detection module 20 includes radar signal/receiver 21 and signal amplifier 22, described Radar signal/receiver 21 is connected with the signal amplifier 22, and the signal amplifier 22 connects with the control module Connect 30. When it is implemented, as shown in Fig. 2 radar signal/receiver 21 be used for launch and receive radar signal, and will The Radar Signal Transmission received to signal amplifier 22, signal amplifier 22 transmitted after being amplified to the signal received to Control module 40, Treatment Analysis is carried out to the radar signal received by control module 40, judges whethe
sensor starts, by Signal transmissions to controller, regulate light-source brightness to the brightest, reach current illumination object, when object leaves investigative range, infrared sensor again sends a signal to controller and light-source brightness is adjusted to power save mode. 2. a kind of new type solar energy street lamp according to claim 1, it is characterized in that: described street lamp body by lamp stand, arm, lamp holder, built-in fitting forms, contiguous solar panel place, lamp stand top connects arm, and arm end is connected with lamp holder, and lamp stand is hollow structure, lamp stand upper end is fixed with infrared sensor, lower end cavity internal fixtion has controller, and lamp stand is fixed on the ground by ground built-in fitting, has battery in built-in fitting. 3. a kind of new type solar energy street lamp according to claim 1, is characterized in that: described solar panel slant setting. 4. a kind of new type solar energy street lamp according to claim 1, is characterized in that: described infrared sensor is placed on lamp stand. 5. a kind of new type solar energy street lamp according to claim 1, is characterized in that: described solar panel is single-crystalline-silicon solar-cell panel. Priority Applications (1) Applications Claiming Priority (1) Publications (1) Family ID=53412581 Family Applications (1) Country Status (1) Cited By (4) – 2013 – 2013-12-11 CN CN201310667494.4A patent/CN104713016A/en active Pending
of the detector. – the approach or movement of the object typically changes the thermal or long wavelength radiation 52 sensed by the detector which results in an electric signal which can be amplified by amplifier 60. – the PIR sensor (detector) is preferably arranged as described in U.S. Pat. No. 3,958,118 issued to the inventor hereof with a lens system 54 which focuses the infrared rays on the detector 50. – the PIR sensor uses a minimal amount of current (power consumption of about 10 microwatts) and is designed to operate on the low voltage supplied by the rechargeable battery. Indeed, in U.S. Pat. No. – the signal output by the PIR detector 50 is amplified by amplifier 60, and fed to the light control logic and timing circuit 70. – Light control logic and timing circuit 70 preferably includes the resistance of the photocell 80 as a part of a control circuit which functions to prevent the system from turning on lamp 40 unless the dual requirements of low background light level (i.e darkness) sensed by the photocell 80, and the detection of a moving object sensed by PIR detector 50 are met. In this manner, the battery charge is maintained, as charge is not wasted by lighting lamp 40 during the daytime. – the adjustable timer 74 part of the light control logic and timing circuit 70 which is indicated as a potentiometer, but which may take any of numerous forms well known in the arts, is utilized to limit the drain on battery 30. – timer 74 closes the circuit between the b
the past, the sun simulators used in labs consisted of bulbs (e.g., Xenon) but within the last few years, they have moved to Light Emitting Diodes (LED). These industrial sun simulators are not optimized, or practical, for human health purposes and are too expensive for such use. – The present invention is comprised of a solar spectrum radiation device that simulates the sun's electro-magnetic energy (EM) representing the full solar spectrum measured at earth's sea level. The device will provide the correct wavelengths (nm), irradiance (W/m2), and illuminance (LUX). – The solar spectrum projection of the device is fully automated in accordance with the time of the day, time of the year, altitude, and location. In preferred embodiments, the device's illumination source can be housed in either a ceiling-mounted fixture, standing floor/desk lamp, wall panels, or Edison screw bulbs. In some configurations, the light source can consist, but is not limited to, Light Emitting Diodes (LEDs) whereas each LED represents a at least one specific wavelength that can be individually controlled to turn on/off and regulate the irradiance levels. Multiple LEDs of different wavelengths, combined, will represent the simulated solar spectrum as measured upon the Earth's surface. The device can either be controlled by pre-programmed instructions and/or by manual end-user input. It can also be part of an Internet of Things (IoT) cloud-based platform to receive input from solar EM meters located ar