The relationship between temperature measurement and imaging accuracy of ifd-x micro infrared imager (module)

IFD-x Miniature infrared imager （ modular ） About temperature measurement and imaging accuracy

It is a non-contact thermal imaging instrument based on infrared array high-precision temperature sensor and advanced software algorithm , Infrared imaging can be performed on any object within the field of view , The imaging resolution reaches 512*384 Pixels , Temperature sensitivity 0.1℃, Absolute accuracy ±1.5℃, Refresh rate up to 64Hz. With storage and real-time clock , With real-time data output display 、 Photo storage function , Digital interfaces include UART and USB, It can directly connect computers and mobile phones , Cooperate with upper computer software or mobile phone APP Program , It's very convenient to use . Widely used in electronic equipment development 、 PCB test 、 The new material 、 Heating construction 、 Non contact temperature measurement and control 、 Trespass 、 Biological detection and other industries and fields .

Temperature sensing sensitivity is the minimum temperature change that the sensor can distinguish , It is the basis of heat measurement , The sensitivity of the sensor used in this equipment is 0.1℃@1Hz, With the increase of sensor measurement rate , The bottom noise of the measurement system increases , Then the sensitivity of temperature perception decreases . for example 4Hz、 8Hz、 16Hz The temperature sensitivity will be 0.5、 1.0 and 1.5℃. The data obtained after heat perception is calculated as the absolute temperature value, which depends on the radiation coefficient of the measured object , Different materials or surface finish 、 When affected by factors such as moisture content , The emissivity will be different , Therefore, for a specific material, the emissivity is a constantly changing value in a small range , This leads to the absolute temperature calculated by using thermal radiation data is not particularly accurate . in addition , The tiny particles between the imager and the measured object will cause some attenuation of thermal radiation , If there are other objects with good reflection performance around, it will also produce some reflection of thermal radiation , It causes some changes in the propagation of radiant energy , And then affect the calculation of the final absolute temperature value .

therefore , The main function of infrared imaging is to distinguish subtle thermal changes through high thermal radiation resolution 、 Different objects and object boundaries , Then form images represented by different colors , The point is to be able to distinguish between different calories , Not the absolute temperature . The measurement of absolute temperature is affected by many objective and uncertain random factors , It's a problem that the current technical level can't solve very well , Generally speaking, the absolute temperature measurement accuracy refers to the results obtained under the condition of artificial elimination of interference factors in the laboratory environment , It does not refer to the environment in which customers use .