How much do you know about infrared sensors?
June 15,2022
ir sensor and relay,adjustable ir sensor,Cheap IR motion sensor
We all know that ir sensor and relay have the advantages of high sensitivity and fast response, and it is precisely because of these advantages that they are widely used. Today's infrared sensors are widely used in modern home life, and there are many kinds.
So, do you really know about ir sensor and relay? What is an infrared sensor? What is the principle? What are the classifications and applications? This is a high-tech product. In our life, there are shadows of them everywhere. Today, we will introduce it to everyone!
Since the 21st century, with the advancement of science and technology, more and more high-tech products have appeared in our lives, and infrared sensors are one of them. Everyone knows its existence, and infrared sensors use infrared to achieve our desired purpose. So what is ir sensor and relay?
ir sensor and relay is a measurement tool that uses infrared as a medium. The function of infrared sensor is not unique. This sensing technology has been widely used in our current life. Status is also not to be underestimated.
Principle of adjustable ir sensor Target to be measured: According to the infrared radiation characteristics of the target to be measured, the infrared system can be set.
Atmospheric attenuation: When the infrared radiation of the target to be measured passes through the earth's atmosphere, the infrared radiation emitted by the infrared source will be attenuated due to the scattering and absorption of gas molecules and various gases and various sol particles.
Optical Receiver: It receives part of the infrared radiation of the target and transmits it to the infrared sensor. It is equivalent to a radar antenna and is often used as an objective lens.
Radiation modulator: modulates the radiation from the target to be measured into alternating radiation, provides target orientation information, and can filter out large-area interference signals. Also known as a modulation disc and a chopper, it has a variety of structures.
Infrared detector: This is the heart of the infrared system. It is a Cheap IR motion sensor that detects infrared radiation by using the physical effect presented by the interaction between infrared radiation and matter. In most cases, it uses the electrical effect presented by this interaction. Such detectors can be divided into two types: photon detectors and thermally sensitive detectors.
Detector cooler: Since some detectors must work at high temperatures, the corresponding system must have refrigeration equipment. After cooling, the device can shorten the response time and improve the detection sensitivity.
Signal processing system: Amplifies and filters the detected signals, and extracts information from these signals. This information is then converted into the required format and sent to a control device or display.
Display device: This is the terminal device of the infrared device. Commonly used displays include oscilloscopes, picture tubes, infrared photosensitive materials, indicating instruments and recorders.
According to the above process, the infrared system can complete the measurement of the corresponding physical quantity. The core of the infrared system is the Cheap IR motion sensor. According to the different detection mechanisms, it can be divided into two categories: thermal detectors and photon detectors. The following takes the heat detector as an example to analyze the principle of the detector.
Thermal detectors use the radiant heat effect to cause the temperature of the detection element to rise after receiving radiant energy, which in turn changes the temperature-dependent performance of the detector. By detecting a change in one of these properties, radiation can be detected.
Radiation is mostly detected by thermoelectric changes. When the element receives radiation and causes a physical change other than electricity, the corresponding change in electricity can be measured after appropriate transformation.
Types of Infrared Sensors
Infrared is a kind of light invisible to the human eye, so it has all the properties of all rays of light. But at the same time, infrared also has a very significant thermal effect. All substances above absolute zero, or -273°C, can produce infrared light.
According to different emission methods, infrared sensors can be divided into two types: active and passive.
The transmitter of ir sensor and relay, adjustable ir sensor, Cheap IR motion sensor emits a modulated infrared beam, which is received by the infrared receiver, thereby forming a warning line composed of infrared beams. When it is blocked by leaves, rain, small animals, snow, sand, and fog, the alarm should not be reported, and the alarm will be issued when people or objects of a considerable size are blocked.