A Setup for Measuring the Centering Error of a Dual-Element Pyroelectric Infrared Sensor Module

Sensors

Vu Van Quang¹  Vu Toan Thang¹  Ngoc-Tam Bui¹ 

[1] School of Mechanical Engineering, Hanoi University of Science and Technology, Hanoi 100000, Vietnam;

关键词: dual-element PIR sensor;    Fresnel lens;    centering error;    optical axis;    modulation;    infrared radiation;   

DOI  :  10.3390/s21196684

来源: DOAJ

【 摘 要 】

This paper presents an experimental setup to measure the horizontal centering error of a pre-built pyroelectric infrared (PIR) sensor module, in which a dual-element PIR sensor is aligned at the focal point of a single-zone Fresnel Lens. In the setup, the sensor module was placed facing a modulated infrared radiating source and turned over a range of horizontal angles. The position of the optical axis of the sensor module was determined based on the analysis of the output response of the sensor at turned angles. Thus, the horizontal centering error of the module is defined as the difference between the mechanical axis of the housing and the found optical axis. For the prebuilt sensor module, with the specific available equipment, the measurement of the centering error of the module achieved a resolution of 0.02 degrees.

【 授权许可】

Unknown