Working Principle Guide of Door-Type Thermometer
All objects in nature with temperatures above * * zero degrees (-273.15 ° C) continuously radiate electromagnetic waves, including infrared waves, into the surrounding space due to the thermal motion of molecules. The radiation energy density is proportional to the fourth power of the object's own temperature. Small temperature changes can cause significant changes in radiation energy, so using infrared radiation to measure object temperature has high sensitivity.
The infrared radiation characteristics of the human body are closely related to its surface temperature. The human body mainly radiates infrared radiation with a wavelength of 9-10 μ m. By measuring the infrared energy radiated by the human body itself, the surface temperature of the human body can be accurately determined. Due to the fact that light within this wavelength range is not absorbed by air, the infrared energy radiated by the human body can be used to measure the surface temperature of the human body.
The biggest advantage of infrared temperature measurement technology is non-contact and fast measurement, which can be completed within 1 second. Due to the fact that infrared thermometers only receive infrared radiation energy emitted by the human body, without any other physical or chemical factors affecting the human body, they have no harm to the human body.
Principle of door thermometer
The infrared temperature rapid detector consists of an infrared sensor and a display alarm box, which are connected by a dedicated five core cable. During installation, fix the infrared sensor with a bracket next to the channel or door, etc., so that the distance between the forehead of the person being tested and the infrared sensor is 30cm. Place a table next to it and a display alarm box.
Characteristics of using a door thermometer:
Non contact measurement, does not come into contact with the human body, avoids cross infection, and does not require hygiene.
The detection speed is fast, usually less than 1 second.
Automatic conversion of body surface temperature, converting the measurement results of forehead surface temperature into human armpit temperature and displaying it.
When the body temperature exceeds 38 ° C, the display will automatically sound an alarm, and the red light of the detector will flash, while a buzzing sound will be emitted to remind the inspection personnel.
Set the alarm temperature by yourself, such as 37.8 ° C.
Automatic compensation of environmental temperature to eliminate measurement errors caused by changes in environmental temperature.
