What is a Hot Pixel?

Infrared thermal imaging technology is used in both military and civilian applications. It originally originated in military use and gradually switched to civilian use. It is generally called a thermal imager in civilian use, and is mainly used in research and development or industrial inspection and equipment maintenance. It is also widely used in fire prevention, night vision, and security. Generally speaking, a thermal imager is to convert invisible infrared energy emitted by an object into a visible thermal image. The different colors on the top of the thermal image represent different temperatures of the measured object.

Infrared camera

Infrared cameras typically consist of opto-mechanical components,

(1) For unbalanced loads of generators and motors,

Popularly speaking, a thermal imager is to convert invisible infrared energy emitted by an object into visible

1. Because infrared thermal imaging technology is a kind of

1.Thermal sensitivity / NETD

The ability of a thermal imager to distinguish small temperature differences affects the degree of delicateness of the imaging to a certain extent. The higher the sensitivity, the better the imaging effect and the more able to distinguish the specific location of the fault point.

2. Infrared resolution

Infrared resolution refers to the detector pixels of a thermal imager. Similar to visible light, the higher the pixel, the clearer and more delicate the picture, and the higher the pixel, the more temperature data is acquired at the same time.

3.Field of View / FOV

Horizontal and vertical angles imaged on the detector. The larger the angle, the wider you can see, such as a wide-angle lens. The smaller the angle, the smaller you see, such as a telephoto lens. So choosing the right lens for different occasions is also very important.

4.Spatial resolution / IFOV

IFOV refers to the angle that can be imaged on a single pixel. Because the angle is too small, it is expressed in milliradians mrad. IFOV is affected by the detector and the lens. It can be found that the lens is unchanged. The higher the pixel, the smaller the IFOV. Conversely, the pixels are unchanged, the smaller the field of view angle, the smaller the IFOV. At the same time, the smaller the IFOV, the clearer the imaging effect.

5. Temperature measurement range

The range from the lowest temperature to the highest temperature that the device can measure. There can be multiple temperature ranges in the range, which need to be set manually. For example, the temperature measurement range of FOTRIC 226 is -20 ~ 650 , the temperature range is divided into -20 ~ 150 , 0 ~ 350 and 200 ~ 650 . Try to choose a small range that can meet the requirements for testing. If you test the target at 60 ° C, choosing a range of -20 ~ 150 ° C will be more clear than choosing a range of 0 ~ 350 ° C.

6. Full radiant thermal image video stream

A video stream that saves the temperature data of each pixel at each frame. Full-radiation video can be used to analyze the temperature change at a later stage, and arbitrary temperature analysis can be performed for each frame of the picture. ^[3]