Introduction to the related use skills of infrared thermometer
Infrared thermometer is actually a kind of electromagnetic wave, its wavelength ranges from 0.78 microns to 1000 microns.
For the convenience of research, infrared thermometers are divided into three bands by scientists, near infrared:
The wavelength is 0.78 microns to 3.0 microns, mid-infrared: the wavelength is 3.0 microns to 20 microns, far infrared: the wavelength is 20 microns to 1000 microns.
The discovery of infrared marks another leap in human understanding of nature.
Infrared thermometers are very convenient to use. What's more convenient is that now there is a temperature measurement that can be performed without touching the real object, which greatly improves people's production and living efficiency.
In the production process, infrared temperature measurement technology plays an important role in product quality control and monitoring, equipment online fault diagnosis and safety protection, and energy saving.
In the past 20 years, the non-contact infrared human body thermometer has developed rapidly in technology, its performance has been continuously improved, its functions have been continuously enhanced, its varieties have continued to increase, and its scope of application has also continued to expand.
Compared with contact temperature measurement methods, infrared temperature measurement has the advantages of fast response time, non-contact, safe use and long service life.
Non-contact infrared thermometers include three series of portable, on-line and scanning, and are equipped with various options and computer software, and each series has various models and specifications.
Among the various models of thermometers with different specifications, it is very important for users to choose the correct model of infrared thermometer.
Working principle of infrared thermometer
The optical system collects the target infrared radiation energy in its field of view, and the size of the field of view is determined by the optical parts and position of the thermometer.
Infrared energy is focused on a photodetector and converted into a corresponding electrical signal. The signal is converted into the temperature value of the measured target after being calibrated by the amplifier and signal processing circuit according to the algorithm inside the instrument and the target emissivity.
In addition, the environmental conditions of the target and the thermometer should also be considered, such as the influence of factors such as temperature, atmosphere, pollution and interference on the performance indicators and the correction method.
All objects with a temperature higher than zero are constantly emitting infrared radiation energy to the surrounding space.
The size of the infrared radiation energy of an object and its distribution according to the wavelength have a very close relationship with its surface temperature.
Therefore, by measuring the infrared energy radiated by the object itself, its surface temperature can be accurately determined, which is the objective basis for infrared radiation temperature measurement.
