1) Adjust the focal length .
2) Choose the correct temperature measurement range .
3) Know the maximum measurement distance .
4) Is it only required to generate a clear infrared thermal image, or does it require accurate temperature measurement at the same time? .
5) Single working background .
6) Ensure the instrument is stable during the measurement process 1) Adjust the focal length You can adjust the image curve after the infrared image is stored, but you cannot change the focal length after the image is stored, nor can you eliminate other messy heat reflections. Ensuring the correctness of the operation at the first time will avoid on-site operation errors. Adjust the focus carefully! If the overheating or overcold reflection of the background above or around the target affects the accuracy of the target measurement, try to adjust the focus or measurement orientation to reduce or eliminate the effect of reflection.
(FoRD means: Focus focal length, Range range, Distance distance)
2) Choose the correct temperature measurement range Do you know the temperature measurement range of the target being measured on site? In order to get the correct temperature reading, be sure to set the correct temperature measurement range. When observing the target, fine-tuning the temperature span of the instrument will get the best image quality. This will also affect the quality of the temperature curve and the accuracy of temperature measurement at the same time.
3) Know the maximum measurement distance When you measure the target temperature, be sure to know the maximum measurement distance that can get accurate temperature readings. For an uncooled micro-heat type focal plane detector, in order to accurately distinguish the target, the target image through the optical system of the thermal imager must occupy 9 pixels or more. If the instrument is too far away from the target, the target will be small, and the temperature measurement result will not accurately reflect the true temperature of the target object, because the temperature measured by the infrared camera at this time averages the temperature of the target object and the surrounding environment. In order to get the most accurate measurement readings, please fill the field of view of the instrument as much as possible with the target object. Show enough scenery to be able to distinguish the target. The distance to the target should not be less than the minimum focal length of the thermal imager’s optical system, otherwise it will not be able to focus into a clear image.
4) Is there any difference between only requiring a clear infrared thermal image or requiring accurate temperature measurement at the same time? A quantified temperature curve can be used to measure the temperature in the field, and it can also be used to edit the significant temperature rise. Clear infrared images are also very important. However, if temperature measurement is required during the working process, and target temperature comparison and trend analysis are required, then it is necessary to record all target and ambient temperature conditions that affect accurate temperature measurement, such as emissivity, ambient temperature, wind speed and direction, and humidity , Heat reflection source and so on.
5) Single working background For example, when the weather is cold, you will find that most of the targets are close to the ambient temperature when conducting inspections outdoors. When working outdoors, be sure to consider the effects of sun reflection and absorption on the image and temperature measurement. Therefore, some older models of thermal imaging cameras can only perform measurements at night to avoid the effects of solar reflections.
6) Ensure that the instrument is stable during the measurement. In the process of using a low frame rate infrared thermal imaging camera to capture images, the image may be blurred due to the movement of the instrument. In order to achieve the best results, the instrument should be as stable as possible when freezing and recording images. When pressing the store button, try to ensure lightness and smoothness. Even slight instrument shaking may cause unclear images. It is recommended to use a support under your arm to stabilize it, or place the instrument on the surface of the object, or use a tripod to keep it as stable as possible.
Post time: Apr-25-2021