Pyroelectric sensor
A pyroelectric sensor and pyroelectric technology, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of false alarms or even non-reports, low reliability, poor stability, etc., so as to improve the service life and detection The effect of measuring the effect
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[0016] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings, so as to make the technical solution of the present invention easier to understand and grasp.
[0017] refer to figure 1 As shown, a pyroelectric sensor includes a housing 100 and a pyroelectric element 200. When the pyroelectric element 200 detects a biological heat source, it outputs a human signal. The housing 100 is provided with at least 3 groups of Fresnel The optical axes of the lens 210 and the Fresnel lens 210 intersect at the intersection of the optical axes, and the optical axis is the straight line where the line connecting the center point of the Fresnel lens 210 and the light spot is located. By setting in this way, the response accuracy is improved, and the use environment and service life are guaranteed. The shape of the Fresnel lens 210 is arc. Through the arc setting, the viewing angle range is improved. The Fre...
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