What Kind Of Sensor Does Infrared Sensor Belong To

Infrared sensors belong to photoelectric sensors. Infrared sensors generally refer to infrared sensors, which are sensors that use infrared radiation for data processing and have the advantages of high sensitivity. Infrared sensors can control the operation of driving devices.
A sensor that utilizes the physical properties of infrared radiation for measurement. Infrared, also known as infrared light, has properties such as reflection, refraction, scattering, interference, and absorption. Any substance, as long as it has a certain temperature (above absolute zero), can emit infrared radiation. Infrared sensors do not come into direct contact with the object being measured, so there is no friction, and they have the advantages of high sensitivity and fast response.
Infrared sensors include optical systems, detection components, and conversion circuits. Optical systems can be divided into two categories based on their structures: transmissive and reflective. Detection components can be divided into thermosensitive detection components and photoelectric detection components according to their working principles. The most commonly used thermistor is thermistor. When a thermistor is exposed to infrared radiation, its temperature increases and its resistance changes (this change may be larger or smaller, as thermistors can be divided into positive temperature coefficient thermistors and negative temperature coefficient thermistors), which are converted into electrical signals through a conversion circuit for output. The commonly used photoelectric detection element is a photosensitive element, which is usually made of materials such as lead sulfide, lead selenide, indium arsenide, antimony arsenide, tellurium cadmium mercury ternary alloy, germanium, and silicon doping.
Infrared sensors are commonly used for non-contact temperature measurement, gas composition analysis, and non-destructive testing, and have been widely applied in fields such as medicine, military, space technology, and environmental engineering. For example, by using infrared sensors to measure the surface temperature of the human body from a distance, thermal imaging can be used to detect areas of abnormal temperature and diagnose and treat diseases in a timely manner (see thermal imaging camera); By using infrared sensors on artificial satellites to monitor the Earth's clouds, large-scale weather forecasting can be achieved; The use of infrared sensors can detect overheating conditions of the engine running on the aircraft.
Telescopes with infrared sensors can be used for military operations, detecting enemies in dense forests in forest warfare, and detecting enemies behind walls in urban warfare. All of these use infrared sensors to measure the surface temperature of the human body and determine the location of the enemy.