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Three-wire pendulum period measuring device based on infrared reflection sensor

SHI Ming-ji;QIN Jia-qiong;LI Hao-bo;HONG Qian;YANG Xue-bing;School of Electronic and Electrical Engineering,Nanyang Institute of Technology;  
A three-wire pendulum period measuring device based on infrared reflection sensor was proposed.The torsion of the three-wire pendulum was converted to the change of voltage signal by the infrared reflection sensor.The data was collected by data acquisition system and displayed and stored on the computer in real time.The improved experimental device had some advantages over the existing photoelectric measuring device,such as higher accuracy,easier adjustment and higher reliability.The relative error of the developed experimental device was only 0.19%.
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