Environmental radiation from infrared thermometers
In the outdoor power equipment infrared detection, the detection instrument receives infrared radiation in addition to the corresponding parts of the equipment to be inspected in addition to their own radiation, will include other parts of the equipment and the background of the reflection, as well as directly into the solar radiation. These radiations will interfere with the temperature of the part of the equipment to be tested, bringing errors to fault detection. In order to reduce the impact of environmental and background radiation, the following countermeasures should be taken: On-site infrared detection of outdoor electrical equipment, as far as possible, choose to carry out in cloudy days or in the evening at sunset around the time of no light. This prevents the effects of direct incident, reflected and scattered solar radiation. For indoor equipment, switching off the lighting can be used, as well as avoiding other radiation effects.
For highly reflective equipment surfaces, appropriate measures should be taken to minimise the effects of solar radiation and radiation from surrounding hot objects. Alternatively, the detection angle can be changed to find the *best* angle for detection that avoids reflections.
In order to reduce solar radiation and the surrounding high-temperature background radiation impact, can be taken during the detection of appropriate shielding measures, or in the infrared thermal imaging instrument with appropriate infrared filters, in order to filter out the sun and other background radiation.
Select the appropriate parameters of the instrument and the detection distance for detection, so that the parts of the equipment to be detected to fill the field of view of the instrument, thereby reducing the interference of background radiation.
