The working principle and application of infrared non-contact thermometer
1. What is an infrared thermometer
The infrared thermometer is specially designed to measure the temperature of the human body, and it can also measure the temperature of the environment, the temperature of the object and so on. Infrared temperature measuring probe is used, the measurement accuracy is high performance and more stable. The infrared thermometer has a voice prompt function when the body temperature is too high, and the power-saving function of automatic shutdown makes consumers love it even more.
Principle of Infrared Thermometer
An infrared thermometer is a thermometer that uses the principle of infrared rays to measure body temperature. The components of the infrared thermometer are mainly electronic accessories.
Therefore, the accuracy of infrared thermometer measurement depends on the electronic accessories used. Infrared thermometers are electronic instruments, so there will be certain errors when using them, but the results will not have too much deviation and will not affect the measurement results.
Our common "temperature gun" is a kind of infrared thermometer. When using it, just point the "gun muzzle" at the object to be measured, and the display screen of the "gun tail" can directly report the temperature of that object in numbers. This wonderful "temperature measuring gun" can measure the range of -20~1600 degrees Celsius What about the temperature inside! When a person walks near it, the measurement result is automatically converted into an oral temperature.
Medical temperature guns are used in areas where infectious diseases occur. They use far-infrared rays to emit light signals to measure the temperature of the human body without touching the human body. They have special uses during the SARS period and the bird flu period. The temperature is designed to be -50~480°C, and the low temperature measurement of minus 50°C can be easily realized, and it can also be used normally in areas with low temperatures such as northeast and northwest.
The temperature measurement principle of the infrared thermometer is to convert the radiant energy of the infrared ray emitted by the object into an electrical signal. The size of the infrared radiant energy corresponds to the temperature of the object (such as molten steel) itself. According to the size of the converted electrical signal, the object can be determined. (such as molten steel) temperature.
Uses of Infrared Thermometers
1. Accurately measure human body temperature, replacing traditional mercury thermometers.
2. Measure the surface temperature of human skin, such as medical skin surface temperature measurement.
3. Measure the surface temperature of an object, for example, it can be used to measure the temperature of the surface of a teacup.
4. Measure the temperature of the liquid, such as the temperature of the baby's bath water, the temperature of the milk in the bottle, etc. Temperature range -50°C~480°C.
First, the principle of infrared thermometer
In nature, as long as the temperature of an object exceeds absolute zero, it will emit corresponding infrared wavelengths to the outside world every moment. An infrared thermometer can accurately detect the wavelength of infrared rays emitted by an object. The instrument analyzes the temperature of the object (which also includes the temperature of the air) according to the wavelength of the data. Then through the optical convergence system in the instrument, the temperature distribution of the object is measured, and the measured wavelength will be converted into a corresponding electrical signal on the photodetector. These electrical signals pass through the amplification element and the signal filter element very weakly, and the average temperature of the object and the temperature of each place can be measured through the analysis of the central processing unit, and the corresponding temperature distribution map of the object can be produced.
Second, the application of infrared thermometer
Infrared thermometers were generally used in meteorological departments and safety inspection departments to detect the real-time average temperature and urban heat distribution of cities. With the rapid development of our science and technology on infrared thermometers, the functions continue to increase, the varieties become more and more, and the fields of application become gradually wider. Now the "market share of infrared thermometers is gradually increasing. Gradually walk in the family, monitor the outdoor temperature in real time in the family, so that users can change the clothes they wear in time to avoid some diseases, and then Being able to measure and draw the distribution map of the family temperature in real time will help us to change the problem of uneven temperature in the home in a timely manner.
Third, precautions for the use of infrared thermometers
1. The infrared thermometer only measures the temperature of the surface of the object.
2. If we measure the temperature through the glass, it may cause inaccurate readings of the infrared thermometer.
3. When using the infrared thermometer, try to avoid using it in places with a lot of steam or dust. so as not to damage the instrument.
Fourth, the general performance parameters of the infrared thermometer
The temperature range used is between -50 degrees and 1600 degrees. The distance used is within 50 meters. The accuracy is within 0.001. The corresponding time is less than 1 second. The power supply voltage is between 220V and .
