Development of infrared electronic ear temperature gun

Development of infrared electronic ear temperature gun

Principle of ear temperature gun scheme: the radiation energy of human tympanic membrane mainly comes from 6 ~ 15 μ Zone M. Ear temperature gun usually uses thermopile sensor, which includes the above optical system, photodetector thermopile and thermistor. The far-infrared 6~15 spectrum of human tympanic membrane was detected by thermopile sensor μ M radiation intensity. This measurement result is a relative quantity, that is, the result is related to the radiation intensity of the measured object and the temperature of the thermopile itself. The thermistor is used to measure the temperature of the thermopile itself. The temperature of the measured object can be obtained by calculating the radiation intensity and the temperature of the thermopile itself.

The calibration of human ear temperature gun is divided into ambient temperature and blackbody temperature calibration. Ambient temperature: put the sensor in a 25.00 + / - 0.02 ° water tank, press a key after it is stable, which generally takes 30 seconds. Blackbody temperature: first adjust the blackbody to 37.00 + / - 0.02 degrees, then insert the sensor into the blackbody, and press a key to confirm after it is stable. It usually takes 20 seconds.

The ear temperature gun adopts single chip microcomputer, with high precision, fast temperature measurement, convenient calibration and low defect rate; It has been adopted by many companies, and the main functional specifications are as follows:

Main functional specifications:

1. Temperature measurement range: forehead: 32-43 ℃, surface temperature: 0-60 ℃

2. Measurement accuracy: ± 0.3C

3. Measurement time: ≤ 1s

4. Measuring distance: 1-10cm

5. Measurement method: infrared measurement

6. Emissivity: 0.95

7. Infrared wavelength: 5-14um

8. Key: on / off / memory, start

9. Function: high temperature alarm, memory temperature for 10 times

10. Composition: it is composed of thermopile infrared sensor, microprocessor memory, liquid crystal display and external display

11. Scope of application: display the body temperature of the measured object by measuring the forehead thermal radiation

12. Ear temperature and frontal temperature can be measured

13. Low voltage prompt function

14. No operation, automatic shutdown for 60 seconds, more power saving;

15. Time display, ambient temperature display, voice counting, LED backlight, cold light El backlight and other functions can be customized.