基于光电转换技术的光电信号采样-保持实验系统  

Experimental system of photoelectric signal sampling-holding based on photoelectric conversion technology

作　　者：徐东 李玉和[1] 王芃[1] 朱昊[1] 郭宏[1] 曹良才[1] XU Dong;LI Yuhe;WANG Peng;ZHU Hao;GUO Hong;Cao Liangcai(Department of Precision Instrument,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学精密仪器系,北京100084

出　　处：《实验技术与管理》2021年第8期25-29,共5页Experimental Technology and Management

基　　金：国家自然科学基金项目(61827825);清华大学本科教材及教学资源建设项目(2020ZY01_02)。

摘　　要：该文设计了一种光电信号采样-保持系统,该系统以光电技术为理论基础,由光电发射、光电信号探测、放大-滤波、采样-保持等4部分组成。通过光电效应触发光信号用于控制电路,得到相应峰-峰值,以采集信号的瞬时值,并提高A/D器件的采样速度。该系统不仅能够有效提高抗干扰能力,而且具有结构明易、操作简单、灵敏度高等特点。实践表明,在“光电技术及系统”实验课中适当引入物理光学等领域知识点,可极大地推动课程改革成效、促进理论与实践相结合能力、提高教学质量,同时也有助于培养学生创新思维、扩展科研视野,对实训能力和科研素养的培育均具有事半功倍的效果。In this paper,an optoelectronic signal sampling-holding system is designed,which is based on optoelectronic technology and consists of four parts such as optoelectronic emission,optoelectronic signal detection,amplification filtering and sampling and holding.After the trigger light signal by photoelectric effect is used in control circuit,the corresponding peak-to-peak value is collected to acquire the instantaneous value of the target signal and improve the sampling speed of A/D device.This system not only can effectively improve the anti-interference ability,but also has the characteristics of simple structure,simple operation and high sensitivity.The practice shows that the proper introduction of knowledge points in the field of physical optics in the experimental course of“Photoelectric technology and system”can greatly promote the effectiveness of curriculum reform,promote the ability of combining theory with practice,and improve the quality of teaching.At the same time,it also helps to cultivate students'innovative thinking,expand their scientific research vision,and has a multiplier effect on the cultivation of practical training ability and scientific research literacy.

关 键 词：光电发射 光电探测 放大滤波 采样-保持 

分 类 号：TN98[电子电信—信息与通信工程] TP744[自动化与计算机技术—检测技术与自动化装置]