| PSD信号处理电路的设计 |
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| 引用本文： | 王志勇.PSD信号处理电路的设计[J].集宁师专学报,2014(2):103-107. |
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| 作者姓名： | 王志勇 |
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| 作者单位： | 乌兰察布市电教仪器馆,内蒙古乌兰察布012000 |
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| 摘 要： | 位置传感器(Position Sensitive Detector,PSD)广泛应用于精度较高的非接触测量中,特别是在激光三角法微位移测量中,常采用PSD作为位置敏感元件感测光线的微小偏移。本文分析了PSD的原理和性质,并设计了PSD的信号处理电路,同时设计了微小信号电流的流压转换电路,将微弱的电流信号转换为电压信号,满足了后续信号处理模块的要求,电路存在的噪声控制在±0.8mV内,使整体测量系统的分辨力达到80nm。
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| 关 键 词： | 微位移测量 位置传感器 电路设计 |
A Signal-Processing Circuit Design of a Position Sensitive Detector |
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| WANG Zhi-yong.A Signal-Processing Circuit Design of a Position Sensitive Detector[J].Journal of Jining Teachers College,2014(2):103-107. |
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| Authors: | WANG Zhi-yong |
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| Institution: | WANG Zhi-yong (Center for Education Technology, Wulanchabu 012000, Inner Mongolia) |
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| Abstract: | Position Sensitive Detector is widely used in high-precision non-contact measurements,and is particularly applied in micro-distance measurements in laser triangulation methods,in which,PSD as locality-sensory units,are always used to sense slight position shifts of light spots.In this article,the author analyzes the principles and properties of PSD,and designs both the signal-processing circuit for the PSD and a unique current conversion circuit which converts weak current signals to easily-measured voltage signals,thus meeting the requirements of the subsequent signal-processing modules.The circuit noise is controlled within an approximate bound of more or less 0.8mv（±0.8mv） in order to make the overall resolution power of the measurement system reach up to 80nm. |
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| Keywords: | distance measurement position-sensory detector circuit design |
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