摘要
激光投射式位移传感技术是精确测量桥梁挠度变化的一种有效方法。在介绍现有各种桥梁挠度测量方法的基础上,分析了激光投射式位移传感技术的基本原理和存在的问题,提出了改进措施。实桥测试结果表明,相对精密水准仪的测量效果,改进后的激光投射式挠度传感器在实际桥梁,尤其是高落差、大跨度桥梁的挠度测量中,具有操作方便、测量速度快、测量精度高等优势。该套传感器已成功应用于渝黔高速公路河耳沟大桥的桥梁远程健康监测中。
Laser projection deflection sensing technology is analyzed and studied delicately. Some improvements on laser source and target are proposed and set in the instrument. To verify the effect of the improvements, a practical bridge experiment in He'ergou bridge with the technology is designed. The measurement results of laser projection method are compared with those of water level deflection instrument. The experiment shows the first one is better in operation and accuracy, especially for those high-fall and long-span bridges.
出处
《传感技术学报》
CAS
CSCD
北大核心
2009年第5期755-759,共5页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目资助(50808188)
重庆市科委科技攻关计划项目资助(CSTC,2008AC2075)
重庆市教委科学技术研究项目资助(KJ080403)
重庆交通大学桥梁结构工程重点实验室开放基金资助(CQSLBF-Y09-8)
重庆交通大学山区道路建设与维护技术重庆市重点实验室开放基金资助(CQMRCM-09-4)
关键词
桥梁
挠度检测
激光投射式
传感器
水准仪
bridge
deflection measurement
laser projection
sensor
water level