What is the principle of the infrared thermometer for the door?
The portal pyrometer consists of an infrared optical lens, filters, sensors and an electrical signal processing unit, etc. It is capable of detecting infrared radiation from the target to be measured;
And according to the intensity of its radiation to determine the temperature of the target, can be easily installed in a variety of applications, especially suitable for the need for long-distance, stronger interference in the industrial environment of the installation.
Door-type infrared thermometer with cast aluminium shell, in the temperature measurement site with good protection ability.
This instrument measures the surface temperature of the forehead of the human body, and then according to the relationship between the temperature of the forehead of the human body and the body temperature to get the actual body temperature.
The optical component of the detector collects the energy emitted and reflected from the forehead onto a sensor, and the electronic component converts this information into a temperature reading which is displayed on the display panel;
When the temperature reading exceeds the high-temperature jing value, the instrument will emit a jing sound, and at the same time, the red jing light is lit, such as the body temperature is normal green jing light is lit.
Working principle:
(1) the natural world, all temperatures higher than zero-degree objects, due to the thermal movement of molecules;
Are constantly radiating to the surrounding space, including infrared waves, including electromagnetic waves, the radiation energy density and the object itself is proportional to the temperature of the fourth power.
Small changes in temperature will cause significant changes in radiant energy, so the use of infrared radiation to measure the temperature of the object is very sensitive.
(2) the human body's infrared radiation characteristics and its surface temperature has a very close relationship, the human body mainly radiates infrared wavelengths in the 9 ~ 10 μm;
By measuring the infrared energy radiated by the human body itself, the surface temperature of the human body can be accurately determined.
As the wavelength range of light is not absorbed by the air, and thus can use the infrared energy radiated by the human body to measure the surface temperature of the human body.
(3) The advantages of infrared temperature measurement technology is non-contact, rapid measurement, within 1 second can be tested.
Because the infrared thermometer only receives the infrared radiation energy emitted by the human body, without any other physical and chemical factors acting on the human body, so there is no harm to the human body.
