Analysis of infrared radiation principle of infrared thermometer
The radiation principle of an infrared thermometer is that all objects are composed of constantly vibrating atoms, and high-energy atoms have higher vibration frequencies. The vibrations of all particles, including these atoms, generate an electromagnetic spectrum. The higher the temperature of an object, the faster its vibration, therefore the higher the radiation energy of the spectrum. As a result, all objects constantly radiate outward at their own wavelength and frequency, which depend on the temperature of the object itself and its spectral emissivity.
The ratio of visual range to distance to diameter refers to the angle at which the instrument is operated, which is determined by the individual's visual acuity. The visual range is the ratio of the distance between the instrument and the target object to the diameter of the target object. The smaller the target object, the closer you should be to it. When the diameter of the target object is small, it is important to place the thermometer closer to the target object to ensure that only the target object is being measured and not the surrounding environment. Laser visible laser points are used to display points in the measurement area, rather than emitting something to be measured. This is a misconception. The sensor is placed next to the laser module and is directly exposed to an object. It forms the same light path as the laser.
Analysis of the Infrared Radiation Principle of Infrared Thermometers: Infrared thermometers operate through infrared radiation. Infrared radiation is a part of the electromagnetic spectrum that occupies the visible light spectrum. The electromagnetic spectrum is a set of different types of radiation. It includes gamma rays, X-rays, ultraviolet radiation, visible infrared radiation, microwaves, and radio waves. The wavelength of infrared is greater than that of visible light. Therefore, infrared is an invisible light. Infrared means below the red line, indicating that this light can only be seen below the red light in the electromagnetic spectrum. Non contact temperature sensors can measure the infrared energy released by all target objects and have the characteristic of fast response. It is commonly used to measure moving and intermittent targets, targets in vacuum conditions, targets that cannot be reached by humans due to harsh environmental space limitations and threats. Although in some cases it can be accomplished using other devices, the cost is relatively high.
Analysis of infrared radiation principle of infrared thermometer II: Contact and non-contact temperature measurement require that the contact temperature detector be proportional to the temperature of the target material. For example, mercury in a glass thermometer undergoes thermal expansion or contraction due to the temperature in the air. When a contact detector is placed in a different environment, it takes some time to adapt to the new environment. This is also known as the response time of the detector. In some application scenarios, it is impractical or impossible for the detector to come into contact with the object being measured. Infrared detectors can measure temperature remotely in a short period of time, so choosing an infrared thermometer is very practical for temperature measurement.
