Human body state detection device and method based on pyroelectric technology

Abstract

The invention discloses a human body state detection device based on a pyroelectric technology. The device comprises a central processing system and an acquisition system; the input end of the centralprocessing system is electrically connected with the output end of a feedback module through a wire; the input end of the feedback module is electrically connected with the output end of the acquisition system through a wire; the acquisition system comprises a pyroelectric sensor; the output end of the pyroelectric sensor is electrically connected with the input end of a digital-analog converterthrough a wire; and the output end of the digital-to-analog converter is electrically connected with the input end of a microcontroller through a wire. The invention relates to the technical field ofhuman body state detection. According to the human body state detection device and method based on the pyroelectric technology, whether a human body target appears or not can be judged, and meanwhile,a people flow state and a moving direction of the human body target can be acquired in real time, so that human body thermal infrared information detected by the detection device has accuracy and high efficiency, and the practicability of the detection device is improved.

Description

technical field [0001] The invention relates to the technical field of human body state detection, in particular to a human body state detection device and method based on pyroelectric technology. Background technique [0002] The pyroelectric effect refers to the phenomenon of charge release when the polarization intensity changes with temperature. Macroscopically, the change of temperature causes voltage or current to appear at both ends of the material. The pyroelectric effect is similar to the piezoelectric effect. The electric effect is also a natural physical effect of the crystal. For a crystal with spontaneous polarization, when the crystal is heated or cooled, the spontaneous polarization intensity changes (△Ps) due to the change in temperature (△T), thus in The phenomenon that a certain direction of the crystal generates surface polarized charges is called the pyroelectric effect. [0003] Most of the existing detection methods for human body status are realized b...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a human body state detection device and method based on pyroelectric technology, which solves the problem that the existing pyroelectric technology cannot accurately detect the moving direction of the human target and the flow of people data, thus reducing the detection rate. The question of device usability

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