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Infrared forehead thermometer chip
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Time：2020-08-16 23:43:37
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The core chip of the infrared temperature gun is mainly composed of ADC chip
The working process of infrared thermometer: Infrared thermometer is composed of optical system, photodetector, signal amplifier, signal processing, display output and other parts. The optical system collects the infrared radiation energy of the target in its field of view, and the size of the field of view is determined by the optical parts and position of the thermometer. The infrared radiated by the object to be measured first enters the optical system of the thermometer, and the optical system condenses the incoming infrared rays to make the energy more concentrated; the collected infrared rays are input into the photodetector, the key component of the detector is the infrared sensor, Its task is to convert the optical signal into an electric signal; the electric signal output from the photodetector is converted into the temperature value of the measured target after being corrected by the amplifier and signal processing circuit according to the internal algorithm of the instrument and the target emissivity.
Calibration of human forehead thermometer
Ambient temperature: Place the sensor in a 25.00 +/-0.02 degree water tank, and press a key to confirm after it stabilizes. It usually takes 30 seconds.
Blackbody temperature: first adjust the blackbody furnace to 37.00 +/-0.02 degrees, then insert the sensor into the blackbody furnace, and press a key to confirm after it stabilizes. Usually takes 20
What needs to be prepared for plan design and product production
1. The shell has several function keys, what are the functions
2. How many feet does the LCD screen need?
3. Is the sensor digital or analog
4. Product specifications: what kind of battery power supply, household or medical, and whether calibration is required
Production test requirements
2. Does the factory have a constant temperature room? The medium, high and low temperature can be adjusted
3. Do you know how to understand the heat sink? One of the structure, optical components and sensors has a problem that causes continuous testing and correction is also an unclear factor. Electronic design engineers may not be able to solve these problems.
4. Do you have clinical trial resources? (Look for a hospital, they have large, medium and small, people who have fever but not fever, and do test data for a period of time)
5. If you do medical regulations, do you have domestic CFDA medical qualifications? Foreign names are called FDA and CE Medical (CFDA approval takes one and a half years at the earliest).
