The future of pyroelectric infrared sensors

With the development of science and technology, computer microprocessors, modern digital signal processing technology, new semiconductors and other materials and the progress of processing and manufacturing technology, pyroelectric infrared sensors will develop rapidly.

A foreign research institute predicts that the global sales of infrared sensors will reach 286 million US dollars. According to a research report by asdropports, the global EO / IR sensor market size will reach US $10 billion by 2024, with a compound annual growth rate of 3.22% compared with the market specification of US $7.3 billion in 2014.

Pyroelectric infrared sensor technology is one of the fastest developing technologies in recent years. At present, infrared sensor has been widely used in aerospace, astronomy, meteorology, industry, military and other fields, playing an irreplaceable important role.

Infrared, in essence, is a kind of electromagnetic radiation wave, its wavelength range is about 0.78 ~ 1000m spectrum range, because it is located in the visible light outside the red light, so it is named infrared. Any object whose temperature is higher than absolute zero will radiate energy to the outer space in the form of infrared.

Infrared sensing technology is used to realize the related physical measurement using infrared radiation.

In recent years, the development trend of infrared sensor mainly focuses on the following aspects:

1. Development of new materials and processing technologies:

With new materials and processing technology, the infrared detection rate of pyroelectric infrared sensor is improved, the response wavelength is increased, the response time is too small, the pixel sensitivity and pixel density are higher, the interference is high, and the production cost is reduced. For example, pyreos and irisys have launched a new pyroelectric sensing technology with thin film and ceramic mixture, which makes the sensor array.

2. Large scale and multi-functional pyroelectric infrared sensor:

With the development of micro electric technology and the continuous expansion of sensor application field, pyroelectric infrared sensor is developing from small and single function to large-scale and multi-functional direction.

The large infrared sensors (16 * 16 to 64 * 64 pixels) developed by foreign countries can not only measure the temperature field, but also obtain the functions of human body detection (i.e. accurate positioning of personal position in space, i.e. people are not active or can be identified) or security monitoring in large areas, which are not provided by advanced small infrared sensors. They are very suitable for home automation and medical treatment Health care, safety protection and other applications. In addition, the development of new multispectral sensors has greatly improved the functionality of infrared imaging array.

3. Intelligent sensor:

The new intelligent pyroelectric infrared sensor usually has many microprocessors built in, which has the functions of Fourier transform, wavelet transform and other advanced digital signal processing or compensation, self diagnosis function, two-way digital communication and other functions, which greatly improves the stability, reliability, signal-to-noise ratio and convenience of the sensor.

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