Hidden defects such as internal cracks, virtual soldering, broken grids, and PID attenuation in photovoltaic modules are the core hidden dangers that restrict the long-term power generation of power plants and shorten the service life of equipment. Such damages cannot be detected by naked eye or conventional multimeters, and can only be non-destructive tested through electroluminescent EL imaging technology. Traditional portable EL devices commonly suffer from problems such as blurry focus, poor low light imaging, limited wired operation, and low efficiency of manual defect recognition. Outdoor inspections during the day also require setting up shading tents, greatly increasing on-site operating costs and time consumption. Suzhou LAILX independently developed the LXG50 portable EL detector, which is equipped with the eighth generation full-time autofocus infrared imaging system, a 30 million industrial grade infrared CMOS chip, and AI intelligent defect recognition software. It realizes direct detection without tents during the day and wireless remote control integrated operation, providing a lightweight high-definition non-destructive testing solution for component factory quality inspection and on-site fault diagnosis in power plants. Rapid detection instrument for hidden cracks in photovoltaic panels

The imaging quality is the core competitiveness of EL detectors. The LXG50 is equipped with a 17mm ultra wide angle industrial infrared lens, which can capture the entire photovoltaic module in a single shot at a 95 ° angle. The imaging accuracy can reach 0.2mm/pixel, and the minimum recognizable width is 0.2 μ m for fine cracks. It can clearly capture more than ten types of internal problems such as small hidden cracks, fine virtual welding, battery mixing, sintering defects, hot spot attenuation, PID polarization damage, etc. The imaging clarity far exceeds that of portable models in the same price range in the industry. Unlike ordinary manual focusing devices on the market, the LXG50 is equipped with the LAILX patented full-time low light autofocus module, which does not require manual adjustment of focal length or external infrared fill light ranging. It can achieve instant movement and clear shooting at complex shooting angles such as backlighting, cloudy days, indoor low light, and high-altitude slopes, completely solving the common problems of clear local focusing and blurred image edges. It greatly reduces the threshold for shooting operations, and even beginners can stably produce high-quality EL images.

The equipment adopts an integrated design of programmable power supply and imaging camera. The dedicated EL programmable detection power supply supports 0.1A to 10A wide current adjustment. The weak current mode is suitable for low attenuation fine defect screening. The high current mode quickly locates large-area broken grids and debris damage. The power supply and camera are synchronously linked through wireless signals. Operators can remotely control power on, shooting, and power-off from the ground by holding a tablet, without the need to travel back and forth to component wiring points. The safety of high-altitude roof and bracket detection is significantly improved. The whole machine is designed with lightweight components, and the camera, power supply, and tripod are stored in a customized protective suitcase. The total weight of the entire equipment is controlled within 8kg, making it easy for a single person to conduct short distance inspections and carry with the vehicle without any burden. It perfectly adapts to the flow detection needs of distributed household photovoltaics and industrial and commercial rooftop distributed power stations.

Refactoring the EL detection workflow with an intelligent operating system, equipped with dedicated detection apps for Android and iOS, 2.4G high-speed WIFI wireless real-time image transmission, supporting simultaneous connection of two mobile devices, one responsible for shooting and controlling, and the other for real-time viewing of imaging images, doubling the efficiency of team collaboration detection. Built in AI intelligent defect recognition algorithm, the device automatically marks the location of hidden cracks, virtual welding, and fragments after shooting, classifies and calculates the number and severity level of defects, without the need for manual screening of each image. The manual time consumption for single power station detection is reduced by 60%; The software integrates GPS positioning, component barcode input, and power station file creation functions. Each EL image is automatically bound with a component number, shooting point, and time coordinate. All detection images and data are synchronously stored in the cloud, and later operation and maintenance traceability and responsibility determination are based on evidence. After the inspection is completed, a standardized inspection report will be automatically generated with one click, including defect diagrams, fault analysis, and rectification suggestions. EPC enterprises and operation and maintenance units can directly use it for project acceptance and fault rectification archiving.

The all-weather outdoor operation capability greatly expands the usage scenarios of the equipment. The LXG50 is equipped with a professional daylight suppression imaging algorithm, which eliminates the need to set up a heavy shading tent. It can directly capture images under clear sunlight during the day, eliminating the process of tent handling, setting up, and storage. The detection time of a single component is reduced to 3 to 10 seconds. The core components of the body adopt industrial grade dust-proof and waterproof packaging, with an IP54 protection level suitable for rainy and windy outdoor environments. It is equipped with a large capacity fast charging lithium battery, which can support continuous shooting of hundreds of components in the sky with a single full charge. It can operate continuously in outdoor scenarios without external power supply. The equipment strictly follows the industry standards for EL testing of photovoltaic modules, and the imaging data has legal effect. Third party testing institutions and component manufacturing enterprises can use this equipment to issue compliance testing documents.

Suzhou LAILX has been deeply involved in the field of photovoltaic non-destructive testing for many years. All core optical and circuit modules of LXG50 are independently developed and produced by the enterprise, which is different from assembly equipment in the market. The whole machine has a unified warranty and a complete set of original factory technical after-sales service, providing free software iteration upgrades and on-site operation training services. At present, this equipment has been widely used in various domestic component production factories for incoming material inspection, photovoltaic power station grid connection acceptance, annual hidden danger investigation of existing power stations, energy storage photovoltaic system quality appraisal and other scenarios. With the three core advantages of high-definition imaging, wireless portability, and AI intelligent recognition, it breaks the monopoly of imported EL equipment and lowers the industry's non-destructive testing threshold with high cost-effectiveness domestic equipment.

Under the trend of refined operation and maintenance transformation in photovoltaic power plants, early detection of internal defects in components has become a key link in cost reduction and efficiency improvement. The LXG50 portable EL detector simplifies the entire EL detection process with the advantages of lightweight, intelligence, and high definition, accurately excavates hidden faults in components, avoids the risks of hot spot fires and power generation attenuation from the source, and helps the photovoltaic industry improve the quality control level of the entire chain.

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