Pyroelectric infrared sensor

一种热释红外传感器

Abstract

The invention provides a pyroelectric infrared sensor which comprises a casing body, a window, a first pyroelectric element, a second pyroelectric element, a second pyroelectric element and an FET tube. A window is arranged at the top of the casing body. The first pyroelectric element, the second pyroelectric element and the second pyroelectric element are arranged right below the window. The first pyroelectric element, the second pyroelectric element and the second pyroelectric element are arranged in an equilateral triangle at the bottom of the casing body through a bracket. The first pyroelectric element, the second pyroelectric element and the second pyroelectric element are connected in series. The FET tube is arranged at the bottom of the casing body at the center of the first pyroelectric element, the second pyroelectric element and the second pyroelectric element. One end of the first pyroelectric element, the second pyroelectric element and the second pyroelectric element in series is connected with the input end of the FET tube, and the other end is set as a GND end. The output ends of the FET tube are respectively set as a D end and an S end. The pyroelectric infrared sensor provided by the invention has the advantages of low cost, simple wiring, stable technical performance, strong anti-interference ability and the like.
本发明公开了一种热释红外传感器,包括:壳体、窗口、第一热释元件、第二热释元件、第二热释元件、FET管,所述壳体顶部设置有窗口,所述窗口正下方设置有第一热释元件、第二热释元件、第二热释元件,所述第一热释元件、第二热释元件、第二热释元件通过支架在壳体底部呈等边三角形排列,第一热释元件、第二热释元件、第二热释元件相串联;所述第一热释元件、第二热释元件、第二热释元件中心位置处的壳体底部设置有FET管,所述第一热释元件、第二热释元件、第二热释元件串联一端与FET管输入端相连接,另一端设置为GND端;所述FET管输出端分别设置为D端,S端。本设计具有成本低、接线简单、技术性能稳定、抗干扰能力强等特点。

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