激光挠度测量系统的实现  

Research on laser deflection meter system

作　　者：刘念东[1] 朱永[1] 符欲梅[1] 章鹏[1] 陈伟民[1] 黄尚廉[1] 

机构地区：[1]重庆大学光电工程学院,重庆400044

出　　处：《自动化与仪器仪表》2001年第5期48-51,共4页Automation & Instrumentation

摘　　要：本文介绍了一种用于大型土木工程结构的投影式光学挠度测量系统。该系统由激光器、光接收器件及其外围信号采集处理电路组成。光接收部分采用特殊的光电接收器件取代传统的CCD或PSD ,使测量范围得到扩大 ;外围电路部分采用现场可编程逻辑阵列FPGA器件作为核心。通过这种设计 ,系统的量程和可扩展性得到改善 ,实现了通道复用。实验室证明 ,系统的测量范围可以达到 2 10mm ,分辨率达到 0 .0 0 5mm 。In this paper,a novel system is developed for the measurement of deflection of large structures.This laser deflection meter system is composed of laser source?opto-receiver and its hardware circuit.The optoelectricreceiver has a special assembled opto-receiver substitute the commonly used opto-receiver such as CCD or PSD,and enlarges the measuring range of deflection.A simple digital interrogation circuit was adopted to process the output of receiver.The heart of the circuit is a Field Programmable Gate Array(FPGA)with mathematical and logic operations integrated in a single chip.This made the system extensive and flexible for measurement.An accuracy of 0.005mm with a measuring range of 210mm was demonstrated in laboratory.The system can be used to test in static and dynamic conditions.

关 键 词：挠度 激光测量 光接收器件 桥梁 

分 类 号：U446[建筑科学—桥梁与隧道工程] TP274.5[交通运输工程—道路与铁道工程]