Influence of environment and background radiation: When conducting infrared detection of outdoor power equipment, the infrared radiation received by the detection instrument includes, in addition to the radiation emitted by the corresponding part of the equipment being inspected, reflections from other parts of the equipment and the background, as well as direct incoming radiation. Sun radiation. These radiations will cause interference to the temperature of the part to be measured on the equipment and bring errors to fault detection. In order to reduce the impact of the environment and background radiation, when conducting on-site infrared testing of outdoor electrical equipment, try to conduct it on cloudy days or during sunset and evening when there is no light. This can prevent the influence of direct incident, reflected and scattered solar radiation; for indoor equipment, you can turn off the lighting and avoid the influence of other radiation. For highly reflective equipment surfaces, appropriate measures should be taken to reduce the impact on solar radiation and radiation from surrounding high-temperature objects, or the detection angle should be changed to find the best angle to avoid reflection for detection. In order to reduce the radiation impact of solar radiation and surrounding high-temperature background, appropriate shielding measures should be taken during detection, or appropriate infrared filters should be installed on infrared measuring instruments to filter out the sun and other background radiation. Select an instrument with appropriate parameters and a detection distance for detection so that the part of the equipment being tested is within the instrument's field of view, thereby reducing interference from background radiation.