A Method of Measuring Large Displacement and Deformation with High Precision *  

测量大变位的一种高精度方法(英文)

作　　者：杨勇[1,2] 钟秉林[1,2] 何小元[1,2] 杨汉国[1,2] 

机构地区：[1]东南大学机械工程系 [2]东南大学力学系

出　　处：《Journal of Southeast University(English Edition)》1998年第1期53-56,共4页东南大学学报（英文版）

摘　　要：A CCD position detecting system measuring the displacement and deformation of structure is presented. The measure method takes advantage of the position detecting technique based on digital image processing. A bright spot is pegged on the object to be measured and imaged to the target of CCD camera through a telescopic lens. The CCD target converts the optical signal to equivalent electric signal. The video frequency signal is digitized to an array of 512×512 pixels by the analog to digital converter (ADC), then transmitted to the computer. The computer controls the data acquisition, conducts image processing and detects the location of the target spot. Comparing the current position with the original position of the spot, the displacement of object is obtained. With the aid of analysis software, the system can achieve the resolution of 0 01 mm in the 6 m distance from the object to the point of observation. To meet the need of practice, the measuring distance can be extended to 100 m or even farther.本文提出一种利用ＣＣＤ位置探测系统测量物体的位移或变形的新方法．目标点固定在被测物体上，成像于ＣＣＤ摄像头，输出电信号．ＡＤ转换器将模拟电信号转换为数字信号，并送至计算机．采用数字图象处理技术进行分析并计算测点的位置变化．在距离被测物体６ｍ时，测量精度可达００１ｍｍ．

关 键 词：DISPLACEMENT DEFORMATION CCD position detection long distance measurement 

分 类 号：TU196.1[建筑科学—建筑理论]