Guidance on infrared measurement principle of special thermometer for electric power industry
The measurement principle of the special infrared thermometer for the electric power industry guides the online thermometer used in the electric power industry. The principle is that as long as the temperature of any object is higher than the zero degree (-50°C), there will be heat radiation emitted to the outside, and the temperature of the object is different. The radiated energy is also different, and the wavelength of the radiation wave is also different, but it always includes infrared radiation. For an object below a thousand degrees Celsius, the strongest electromagnetic wave in its thermal radiation is infrared wave, so the infrared radiation of the object itself It can accurately measure its surface temperature, which is the objective basis for infrared thermometer temperature measurement.
Working principle of electric infrared thermometer:
The non-contact infrared thermometer is composed of optical system, photodetector, signal amplifier, signal processing, display output and other parts. The optical system is to gather the infrared energy radiated by the target object, focus it on the photodetector, and convert it into a corresponding electrical signal, and then convert it into a linear temperature signal value of the measured target after the circuit operation processing circuit. In order to realize further signal processing and control.
What are the characteristics of the electric infrared thermometer?
Compared with infrared measurement and contact temperature measurement, they have significant differences in performance characteristics and temperature measurement requirements
The difference between the non-contact type and the fixed type of electric thermometer is as follows:
Infrared thermometer contact temperature measurement
1. Non-contact temperature measurement has no effect on the object, while contact temperature measurement has an effect on the temperature field of the measured object
2. Detecting the surface temperature of an object is not suitable for measuring transient temperature
3. The response speed is fast, and it can measure objects in motion and transient temperature. It is not convenient to measure objects in motion
4. Wide measurement range The measurement range is not wide enough
5. High measurement accuracy and small resolution
6. It can measure the temperature of small area and large area
7. Can measure temperature on point, line and surface at the same time
8. It can measure relative temperature and relative temperature
