As the core power generation carrier of photovoltaic power plants, photovoltaic modules have hidden defects such as internal cracks, battery fragment grids, solder joints, PID attenuation, and fragment hot spots, which are the core causes of the gradual decline in module power, decreased power generation revenue, and even fire safety hazards. Relying on manual visual inspection can only identify surface damage and cannot capture micro level defects inside components. Electroluminescent EL imaging technology has become the only reliable method for non-destructive testing of internal defects in components. Traditional floor standing EL detection equipment has a large volume and is only suitable for detecting hidden rooms in factories. Old style outdoor portable EL equipment has shortcomings such as blurred imaging, difficulty in focusing, the need to set up shading tents, and the inability to automatically identify defects, which seriously restrict the efficiency of on-site inspections in power plants. Suzhou Laikesi LAILX is deeply involved in the field of photovoltaic optical imaging detection. We have independently developed the LXG50 portable EL detector, which is equipped with a 30 million full frame industrial infrared imaging system, full-time autofocus, and AI defect recognition algorithm. It achieves all-weather outdoor high-definition detection without darkroom, providing a one-stop solution to the pain points of defect detection in photovoltaic components in all scenarios. Rapid detection instrument for hidden cracks in photovoltaic panels

The core imaging system of the LXG50 portable EL detector adopts an imported industrial grade full frame infrared CMOS chip, paired with a 95 ° wide-angle dedicated infrared filtering lens. The effective infrared pixels reach the level of 30 million, and the imaging accuracy is better than 0.2mm per pixel. It can clearly capture subtle hidden crack paths with a width of less than 0.2 microns, accurately identify more than ten types of internal defects such as broken grids, virtual soldering, black core chips, over etching, mixing, hot spot attenuation, PID attenuation, etc. The imaging clarity far exceeds that of portable EL devices of the same level in the industry. The device is equipped with the Lexus patented full-time low light autofocus system, which does not require manual distance measurement and lens adjustment. It can complete automatic autofocus imaging in 3 seconds regardless of strong light during the day or outdoors, cloudy and weak light, or no light at night. It completely eliminates the industry's common problems of manual autofocus operation and blurred imaging of traditional equipment, greatly reducing the detection time of single components. The complete imaging of a single component only takes 3 to 10 seconds, and can complete batch detection of hundreds of components in a single day, greatly improving the efficiency of power station inspection operations.

The core innovation advantage of LXG50 compared to similar products is its 24/7 no shading detection. With the use of dedicated infrared band filtering technology, outdoor operations during the day do not require setting up shading tents, and imaging detection can be completed directly by setting up a tripod, saving a lot of manual time for dismantling shading cloth and building temporary darkrooms with traditional equipment. The advantages of working in uneven terrain scenarios such as mountains, roofs, and floating photovoltaics on water are prominent. The entire equipment adopts a modular and lightweight combination design, consisting of four major components: infrared imaging host, programmable voltage regulator, portable tablet controller, and lightweight carbon fiber tripod. All accessories are stored in a shockproof and waterproof aviation portable case. The weight of the whole set is controlled within 12kg, and a single person can transport it to any photovoltaic operation point. The tripod supports multi level height adjustment and is suitable for detecting components at different heights such as ground arrays, roof high components, and vertically installed photovoltaic curtain walls.

The intelligent wireless interconnection and AI automatic defect recognition function significantly reduce the threshold of detection technology. The device is equipped with a built-in WiFi wireless transmission module, and the tablet controller is wirelessly linked with the imaging host and programmable power supply. Staff can remotely control the shooting, adjust the power supply current, and preview the imaging image in real time from several meters away from the components, avoiding safety risks caused by close contact with high-voltage live components. Customized photovoltaic EL intelligent detection APP with built-in trained photovoltaic defect AI recognition model. After shooting, the system automatically marks the location of hidden cracks, virtual welding, fragments and other defects in the image, synchronously counts the number and proportion of defects, without the need for manual frame by frame screening. Novice operators can also quickly complete defect determination. All imaging original images and defect annotation reports are automatically stored locally on the tablet, supporting cloud synchronous backup, exporting high-definition original images and PDF inspection reports from USB drives, meeting the needs of power plant acceptance archiving and third-party inspection qualification report issuance.

The power supply system adopts a programmable two in one dedicated EL detection power supply, which supports adjustable high and low currents, and is suitable for both single component and whole string component detection modes. The power supply is equipped with a built-in voltage stabilization and anti surge module, and the output voltage and current are stable without fluctuations, avoiding imaging noise and misjudgment defects caused by abnormal power supply. The equipment is equipped with multiple safety protection designs, and the power supply has automatic power-off protection against reverse connection, overcurrent, and overheating. The infrared camera body is waterproof and dustproof, and is suitable for short-term outdoor operations in rainy, snowy, and sandstorm weather; The entire set of equipment covers a working temperature range of -15 ℃ to 55 ℃, with no attenuation in imaging performance in high and low temperature outdoor environments. It is suitable for year-round testing of photovoltaic power plants in different regions such as northern cold and southern high temperature and humidity in China.

From the perspective of industry application scenarios, the LXG50 portable EL detector covers the entire process quality inspection requirements of the photovoltaic industry. The component production factory conducts random inspections of incoming materials and full inspections of finished products before leaving the factory, which can quickly screen for process defects in battery cells; Random inspection of hidden cracks and damages caused by transportation collisions in the warehousing and logistics process; Acceptance of incoming components before construction of photovoltaic power plants, early removal of defective components to avoid rework after installation; Annual inspection of power station operation and maintenance, to identify hot spots, PID decay, and aging cracks caused by long-term outdoor operation; Simultaneously adapting to segmented scenarios such as energy storage photovoltaic systems, household distributed photovoltaics, photovoltaic curtain walls, and agricultural photovoltaic greenhouses for detection. At present, the equipment has been supplied in bulk to domestic new energy operation and maintenance enterprises, third-party photovoltaic testing institutions, and head component production enterprises. With its three core advantages of high-definition imaging, all-weather testing, and AI intelligent recognition, it has become the mainstream standard equipment for EL testing on photovoltaic sites.

Suzhou LAILX insists on independent research and development of instrument software and hardware. The AI defect recognition algorithm equipped on LXG50 can be remotely iterated and upgraded through firmware, continuously optimizing the defect recognition capability of new battery cells and adapting to the detection needs of new generation efficient components such as N-type TOPCon, HJT, IBC, etc. Relying on the comprehensive after-sales technical service system of the enterprise, the equipment provides a one-stop service of long-term warranty, on-site calibration, and operation training to solve the problem of instrument maintenance for users in the later stage. Under the trend of refined operation and maintenance of photovoltaics and quality control throughout the entire lifecycle, LAILX will continue to iterate its core optical detection technology, using portable, high-definition, and intelligent EL detection equipment to help the photovoltaic industry reduce component failure losses, improve overall power generation revenue of power plants, and promote the localization and upgrading of clean energy detection technology.

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