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The future of pyroelectric infrared sensors

PELENS PELENS 2019-09-26 1

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

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

Pyroelectric infrared sensor technology is one of the fastest growing technologies in recent years. Infrared sensors have been widely used in aerospace, astronomy, meteorology, industry, military and other fields, playing an irreplaceable role.

Infrared is essentially an electromagnetic radiation wave whose wavelength range is roughly in the range of 0.78~1000M. Because it is light outside the red light in visible light, it is called infrared. Any object whose temperature is higher than absolute zero will radiate energy to the external space in the form of infrared rays.

The sensing technology that uses infrared radiation to achieve related physical measurements is infrared sensing technology.

In recent years, the development trend of infrared sensors has focused on the following aspects:

1. Development of new materials and processing technologies:

With the new materials and processing technology, the infrared detection rate of the pyroelectric infrared sensor is improved, the response wavelength is increased, the response time is reduced, the pixel sensitivity and pixel density are higher, the interference is high, and the production cost is reduced. For example, PYREOS and IRISYS have introduced a new pyroelectric sensitive technology that combines thin films and ceramics to enable the array of sensitive components.

2. Large-scale and multifunctional of pyroelectric infrared sensors:

The development of micro-electric technology and the application field of sensors are expanding. Pyroelectric infrared sensors are developing from small, single functions to large-scale and multi-functional.

Large-scale infrared sensors (16*16 to 64*64 pixels) developed by foreign countries can not only measure the temperature field, but also obtain the human body detection function that advanced, small infrared sensors do not have (can accurately locate the individual in space). The location in the location, that is, people are inactive, can also be identified) or security monitoring in large areas, etc., is very suitable for home automation, health care, security protection and other applications. In addition, the development of new multi-spectral sensors has greatly improved the functionality of infrared imaging arrays.

3, the intelligence of the sensor:

The new intelligent pyroelectric infrared sensor usually has multiple microprocessors built in, and has advanced digital signal processing or compensation functions such as Fourier transform, wavelet transform, self-diagnosis function, two-way digital communication, etc., making the sensor stable and reliable. Performance such as sex, signal to noise ratio, and convenience are greatly improved.

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