Affected by the recent epidemic situation, infrared thermometers have played a key role in epidemic prevention. The following will focus on the application and measurement technology of infrared thermometers, among which the temperature gun pcb occupies an important technology of temperature measurement. The precision medical display board pcb can display our temperature in the shortest time after measurement, so we have to sigh that the progress of science and technology has been so great. Let’s introduce and analyze the application of temperature gun PCB with Xiaobian.
Infrared thermometer is a kind of meter that uses the radiation principle to measure human body temperature. Its infrared sensor only absorbs the infrared rays radiated by human body without emitting any rays to the outside world, and senses human body temperature through a non-contact method. It can be divided into contact type and non-contact type.
Contact infrared thermometer: Taking ear thermometer as an example, it is mainly composed of casing, temperature probe, temperature sensor, PCB circuit, LCD, buzzer and battery.
Non-contact infrared thermometer: Taking forehead thermometer as an example, it mainly consists of infrared probe assembly, main circuit board assembly, LCD display assembly and shell assembly.
Ear temperature gun
Principle of ear gun: It is a thermometer specially used to measure the temperature of tympanic membrane. The infrared radiation mainly emitted by tympanic membrane is transmitted to thermal detectors such as thermopile through infrared waveguide, and the infrared radiation energy is converted into electric energy, and then the electric signal is processed to obtain the temperature information of human body.
Ear gun features:
1. The infrared ear thermometer is specially used to measure the temperature of human ear canal. Compared with the common electronic thermometer, its measuring principle and measuring position are different, so it is impossible to obtain the same measured value. The following are important concepts for judging body temperature:
A) The normal value of body temperature is a range, not a specific constant value. Everyone is different;
B) Normal body temperature, measured in different parts of the body, is not the same, and should not be used for comparison with each other, among which ear temperature is the most accurate and sensitive;
C) Body temperature will change with age, sex, time, exercise, mood, etc.;
D) You can take your temperature when you and your family are healthy, so that you can compare it when you have a fever in the future.
2. The infrared ear thermometer is a high-tech, high-sensitivity measuring instrument. In the process of use, there are high requirements for the operating environment and measuring method (whether it is aimed at the eardrum or not), so it is easy to cause artificial measurement inaccuracy instead of the instrument itself. Specific precautions:
A) The infrared ear thermometer must be stable in the operating environment for 30 minutes before measurement;
B) The measuring head of the ear thermometer should be inserted as deep as possible into the ear canal so as to stick into the eardrum.
The measured temperature varies with the measured body parts.
Scope of application: It is suitable for family use to avoid cross infection. At the same time, note that the ear canal diameter of babies under 6 months is small, so it is not suitable to use ear thermometer.
Frontal warming gun
Principle of extra-warm gun: Any object will emit infrared rays when it is above absolute zero (-273℃), and the extra-warm gun will receive infrared rays through a sensor to obtain the induced temperature data.
Features of forehead warming gun:
Aiming at the benchmark design of measuring human forehead temperature, it is very simple and convenient to use. 1 second accurate temperature measurement, no laser spot, no potential damage to eyes, no contact with human skin, no cross infection, one-click temperature measurement, and flu screening.
Scope of application: It is suitable for home users, hotels, libraries, large enterprises and institutions, and can also be used in hospitals, schools, customs, airports and other comprehensive places. It can also be provided to medical staff for use in clinics.
With the increasing demand of infrared temperature detection equipment, there are also infrared sensors, the core components used in infrared temperature detection equipment. The most commonly used one is thermopile infrared temperature sensor-SMTIR9901/02, which is. Based on silicon-based infrared sensor of thermopile, infrared sensor can be used for non-contact temperature measurement, because infrared radiation characteristics are related to temperature, and filters can be used to measure different temperature ranges. The mature PCB semiconductor technology can reduce the cost and miniaturize the device. In order to meet some applications, the opening angle of infrared sensor can be designed to be less than 7. Direct induced thermal radiation, used to measure small temperature difference or average temperature, can provide a perfect solution for non-contact temperature measurement.