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本文介绍一种价格便宜的光学振动传感器。它由一个像“麦粒”大小的灯泡和硒光电池组成,标定简单,使用方便。文中给出了详细的操作规范。一、引言在振动实验中,经常提出的一个问题是需要对两个运动物体之间的相对运动进行测量。美国圣地亚哥州立大学在测量核反应堆中心模型里的管子间的相对运动时,就提出了这个问题。该模型中有250根管子,管子的间距还不到1/8英寸。过去,解决类似于这种问题的办法,是用两个加速度表或类似的传感器测出信号差,再用重积分求得相对位移。但这时由于没有地方按装传感器,再加上它是由大信号
This article describes a cheap optical vibration sensor. It consists of a “wheat” size bulb and selenium cells, calibration is simple and easy to use. The article gives a detailed code of practice. I. INTRODUCTION In vibration experiments, one of the most frequently asked questions is the need to measure the relative motion between two moving objects. This problem was raised by San Diego State University in measuring the relative motion of tubes in a nuclear reactor core model. There are 250 tubes in the model, the pitch of the tubes is less than 1/8 inch. In the past, a solution to this problem has been to use two accelerometers or similar sensors to measure the signal difference and then use the double integral to find the relative displacement. But at this moment there is no place to press the sensor, plus it is a big signal