Parameter setting
Before measuring with an infrared thermal camera, the parameters need to be set. Setting the emissivity is critical and has a significant impact on the measurement results. Ensuring accuracy means selecting the correct emissivity for the object being measured, which significantly affects the accuracy of the temperature measurement results. In addition, there are also options for temperature, humidity, and distance settings.
Finding the focus
Generally, the infrared thermal camera is used to scan all parts of interest first to identify any abnormal heating sites. Then, the temperature of the abnormal areas is precisely measured. By comparing the temperature of the abnormal points with the operating temperature history, if there is a significant change in temperature, the image map can be recorded and further analyzed.
Analyzing abnormalities
To detect the temperature anomaly, it should be checked from different directions, and the hotspots should be identified and photographed from different angles. When taking photographs with an infrared thermal camera, the image map includes both the desired abnormal points and the normal ones, providing a reference and a basis for subsequent analysis.
Data recording
Depending on the object being tested, choose a different environmental temperature reference body and record the environmental reference temperature. When shooting, at least two image maps should be taken: one containing two or three similar equipment, for comparison; and the other for shooting the hot phase at a close distance, ensuring safety to obtain the real temperature value. In addition, the infrared thermal camera should also choose an appropriate shooting distance, ensuring the equipment fills the entire image. Additionally, the corresponding visible light photos should also be taken. In addition to recording the image map, the data of the infrared thermal camera needs to be recorded to provide a basis for subsequent analysis.
Solar hot spots can severely damage solar cell components or systems. Therefore, it is necessary to detect solar cell component hot spots to combine or maintain relatively evenly heated battery pieces, avoid energy produced by the component being consumed by the hot spots, and prevent any possible threat to the lifespan of the solar cell component or system. Using an infrared thermal camera can quickly detect hot spots in the component.
What are solar component hot spots? If defects occur during the manufacturing or testing process, such as hidden cracks, fragments, poor welding, or are obstructed by other objects for an extended period of time (such as bird droppings, shading, etc.), the covered solar cell component will generate severe heat, resulting in the "hot spot effect." This effect can cause severe damage to the solar cell, and either partially or fully consume the energy generated by the illuminated cell.
The infrared thermal camera hot spot detection is used to detect the heating status of the battery pieces on the solar cell component. Typically, the temperature distribution of each battery piece is uniform. If there is an individual battery piece with an abnormally high temperature in the component matrix, it indicates that the battery piece has a problem and has shifted from the normal state of converting light energy to electrical energy to consuming energy and generating heat from the battery component, affecting the conversion power of the entire battery component, and the high-temperature battery piece requires replacement to prevent the hot spot effect.
