Infrared (IR) scanning inspection of photovoltaic modules is a non-contact detection method that uses infrared thermal imaging technology to detect the temperature distribution on the surface of photovoltaic modules, thereby discovering potential faults and problem points. The following are the specific steps and precautions for infrared scanning inspection of photovoltaic modules:
1、 Preparation before inspection

Equipment preparation: Ensure that the infrared thermal imager is in good working condition, with sufficient battery power, and set appropriate parameters such as temperature range and color display mode.
Environmental preparation: Check if the surface of the photovoltaic module is clean and free of dust, dirt, and other obstructions. At the same time, ensure stable environmental temperature and avoid interference from external temperature on imaging results.
Safety preparation: Check whether the safety measures of the photovoltaic power station are in place to ensure the safety of personnel and equipment during the inspection process.

2、 Inspection steps

Power on and settings: Turn on the infrared thermal imager and set appropriate parameters based on the characteristics of the photovoltaic module.
Alignment and scanning: Align the infrared thermal imager with the surface of the photovoltaic module, maintain a certain distance and angle, and scan to obtain infrared thermal imaging images.
Observation and analysis: Observe infrared thermal imaging images and analyze the temperature distribution on the surface of photovoltaic modules. Under normal circumstances, the temperature on the surface of photovoltaic modules should be evenly distributed without any abnormal hot spots.
Recording and Marking: For abnormal hot spots discovered, their location, shape, size, and other characteristics should be recorded and marked for subsequent processing.

3、 Precautions

Avoid obstruction: When scanning the front of photovoltaic modules, inspectors should be careful not to obstruct the scanning components to avoid affecting the imaging results.
Maintain distance: During the scanning process, a certain distance and angle should be maintained to ensure accurate imaging results.
Environmental stability: Ensure stable environmental temperature and avoid interference from external temperature on imaging results.
Comprehensive analysis: Although infrared thermal imaging technology can detect thermal spots in photovoltaic modules, it cannot directly determine the specific cause of the malfunction. Therefore, after discovering abnormal hot spots, further analysis and judgment need to be conducted in conjunction with other detection methods.
Regular testing: In order to detect potential problems with photovoltaic modules in a timely manner, it is recommended to conduct infrared scanning inspections on photovoltaic modules regularly.

4、 Application advantages

Non contact detection: Infrared thermal imaging technology does not require contact with the surface of photovoltaic modules, avoiding the damage that traditional detection methods may cause to the modules.
Efficient and fast: The infrared thermal imager can quickly scan the entire photovoltaic module area, generate detailed temperature distribution maps, and improve detection efficiency.
Intuitive and accurate: Infrared thermal imaging images display different temperature regions through different colors or gray levels, helping users intuitively understand the temperature distribution on the surface of photovoltaic modules and accurately identify potential faults and problem points.

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