Components of infrared thermometer:
1 Optical system
The optical system is an important part of the infrared thermometer. Its main functions are: converging the radiation energy, aiming at the measured target, determining the field of view of the thermometer, and at the same time playing a certain sealing role inside the thermometer.
2 infrared detector
The infrared detector is the core part of the infrared thermometer. The infrared detector receives the radiation energy of the measured target through the objective lens, converts the radiation energy into an electrical signal, and finally obtains the surface temperature of the measured object through subsequent processing.
3 Signal processing
The infrared detector converts the infrared radiation into an electrical signal and sends it to the signal processing part. It is input to the microprocessor through the preamplifier and A/D conversion. At the same time, the ambient temperature compensation signal is also input to the microprocessor and linearized by the microprocessor. After processing, environmental compensation and radiation rate correction, the corrected output signal is obtained.
4 display output
In practical applications, the temperature signal provided by the processor is used in two ways: one is displayed through the monitor; the other is to transmit the temperature signal to the industrial control system to control the production process, and there are also two methods used at the same time.
Different types of thermometers can display real-time values, maximum values, minimum values, average values, difference values, as well as emissivity set values, alarm set values, etc. After software processing, they can also display temperature curves and heat maps. wait. The most common thermometers are 0-20mA or 4-20mA current output. If a voltage signal is required, the current signal can also be converted and scaled.
