China OEM Wholesale IR PIR Touch Sensor Factory

Infrared is a kind of light invisible to human eyes, so it has all the characteristics of light. But at the same time, infrared also has a very significant thermal effect. All substances above absolute zero, which is -273°C, can produce infrared rays. According to different sending methods, infrared sensors can be divided into two types: active and passive. This blog mainly introduces PIR sensor to you.

The working principle of PIR sensor

Passive infrared sensors work by detecting infrared rays emitted by the human body. The sensor collects infrared radiation from the outside and then gathers it on the infrared sensor. Infrared sensors usually use pyroelectric elements, which will release charges when receiving infrared radiation temperature changes, and generate an alarm after detection and processing.

This kind of sensor is aimed at detecting human body radiation. Therefore, the radiation sensitive element must be very sensitive to infrared radiation with a wavelength of about 10 μm. In order to be sensitive to the infrared radiation of the human body, its radiation surface is usually covered with a special filter, so that the interference of the environment is obviously controlled.

The development of PIR sensor

With the improvement of modern digital signal processing technology, PIR sensors have developed rapidly in recent years. Sales are increasing year by year. The development trend of infrared sensors is mainly reflected in the following four aspects:

✅The use of new materials and processing technology improves the infrared detection rate of the sensor, increases the response wavelength, shortens the response time, improves pixel sensitivityand density, in the meanwhile, it improves anti-interference performance, and reducesproduction costs.

✅Large-scale and multi-functional. With the development of microelectronics technology and the continuous expansion of the application field of sensors, infrared sensors are developing from small and single-function to large-scale and multi-functional.

For example, the large-scale infrared sensor developed abroad can not only measure the temperature field, but also accurately locate the individual's position in space, or the security monitoring of large areas. It is very suitable for home automation, medical care, safety protection and other occasions.

✅New smart infrared sensors usually have multiple microprocessors built in, with advanced digital signal processing or compensation functions, self-diagnosis function, two-way digital communication and other functions, making the sensor more stable, reliable, and reliable.  Performances such as noise ratio and convenience are greatly improved.

✅Further miniaturization and integration. Using on-chip integration technology (including blind element replacement, non-uniformity correction, partial image processing functions, etc.) and other new device structures and new manufacturing process technologies, in MEMS (micro-electromechanical systems), and even NEMS based on nanotechnology driven by the electromechanical system), the size of the infrared sensor has been greatly reduced, the power consumption has been greatly reduced, and the integration level has been significantly improved.

If you want to buy PIR sensors, we will be your best choice. We have been providing china oem PIR sensor with customers for many years, having advanced technology and high quality products. Welcome to contact us by  sales@technic-lighting.com.

China OEM Wholesale IR PIR Touch Sensor Factory