Infrared thermometer signal processing functions explained
Infrared thermometer signal processing functions explained: Signal processing functions: measurement of discrete processes (such as parts production) and continuous process is different, the infrared thermometer is required to have signal processing functions (such as peak hold, valley hold, average value). Such as temperature measurement of the glass on the conveyor belt, it is necessary to use the peak hold, the temperature of the output signal transmitted to the controller.
Infrared temperature measurement technology in product quality control and monitoring, equipment online troubleshooting, ** protection, as well as energy saving and other aspects of the play is playing an important role. In the past two decades, non-contact infrared thermometer in the rapid development of technology, performance continues to improve, the scope of application is also expanding, the market share grows year by year. Than the contact temperature measurement method, infrared temperature measurement has a fast response time, non-contact, use ** and long service life and other advantages.
Selection of infrared thermometer can be divided into three aspects: performance indicators, such as temperature range, spot size, operating wavelength, measurement accuracy, response time, etc.; environment and working conditions, such as ambient temperature, window, display and output, protection accessories, etc.; other aspects of the choice, such as ease of use, maintenance and calibration performance, as well as price, etc., but also the choice of the thermometer has a certain impact. With the technology and continuous development, infrared pyrometer * best design and new advances for users to provide a variety of functions and multi-purpose instrument, expanding the choice.
Infrared pyrometer signal processing functions explained to determine the temperature range: temperature range is the pyrometer * an important performance indicator. Each type of pyrometer has its own specific temperature measurement range. Therefore, the user's measured temperature range must be considered accurately and thoroughly, neither too narrow nor too wide. According to the law of blackbody radiation, in the short wavelengths of the spectrum by the temperature-induced changes in radiant energy will be more than by the emissivity error caused by the change in radiant energy, therefore, temperature measurement should try to choose the better short-wave.
Determine the target size: infrared thermometer according to the principle can be divided into monochrome pyrometer and two-color pyrometer (radiation colorimetric thermometer). For single-color pyrometer, in the temperature measurement, the measured target area should be filled with pyrometer field of view. It is recommended that the target size exceeds 50% of the field of view size. If the target size is smaller than the field of view, the background radiant energy will enter the pyrometer's visual acoustic signature and interfere with the temperature reading, resulting in an error. On the contrary, if the target is larger than the field of view of the pyrometer, the pyrometer will not be affected by the background outside the measurement area.
Infrared thermometer signal processing functions explained to determine the optical resolution (distance sensitivity) Optical resolution is determined by the ratio of D and S, is the thermometer to the target between the distance D and the measurement of the spot diameter S ratio. If the pyrometer must be installed away from the target due to environmental conditions, but also to measure small targets, you should choose a high optical resolution pyrometer. The higher the optical resolution, i.e. increasing the D:S ratio, the higher the cost of the pyrometer.
