全文下载：2013050525
丁忠军1,2， 李玉伟1
（1.青岛科技大学 自动化与电子工程学院，山东 青岛 266042；2.国家深海基地管理中心，山东 青岛 266061）
摘要：为了保障挖沟机沿海底输油管道安全运动，研制了挖沟机导向杆应变应力测量仪。设计开发了差分输入、两级放大滤波的高精度应变测量电路及专用测控软件，实现导向杆应变应力实时监测。在硬件设计方面，通过高精度仪表放大器AD620实现微弱信号差分输入。在软件设计方面，基于虚拟仪器软件LabVIEW开发了应变应力测量仪测控软件。实验测试表明，该应变应力测量仪实现高精度设计要求。
关键词：应变测量； 实时监测； 导向杆； 放大滤波； LabVIEW
中图分类号： TH 132.413文献标志码： A
Development of Stress-Strain Measurement Instrument for Trencher Guide Bar
DING Zhong-jun1,2, LI Yu-wei1
(1.CollegeofAutomationand Electronic Engineering,QingdaoUniversityof Science and Technology,Qingdao266042,China;
2. National Centre for Deep-sea Base Management,Qingdao266061,China)
Abstract:In order to ensure the safe operation of trencher along the seabed pipeline，the stress-strain measuring instrument used in the trencher guide bar was developed. According to the characteristics of the guide bar，the high precision strain measurement circuit and special measurement and control software with the function of differential input and two stage amplifier-filtering were designed, and the real-time monitoring of guide bar stress-strain was realized. In the aspect of hardware design, the detection principle of the electric resistance strain gauge measuring method was analyzed, the weak signal differential input was realized by high precision instrumentation amplifier AD620 and the design method of two second-order active filter amplifier circuit was introduced. In the aspect of software design, the measurement and control software of stress-strain instrument was developed based on virtual instrument software LabVIEW. Experimental test results show that this stress-strain instrument can meet the demand of high precision design requirements.
Key words:strain measurement； real-time monitoring； guide bar； amplifying and filtering； LabVIEW
收稿日期：2012-09-05
作者简介： 丁忠军（1974—），男，研究员.
