基于四象限探测器的桥梁挠度实时监测系统研究
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摘要
为了实现高精度的桥梁挠度测量,提出了一种基于四象限探测器的桥梁挠度实时监测方法和系统。四象限探测器能使系统在挠度测量的同时还能获得被测点的横向位移,实现二维测量,并且具有高频测量的能力。用本文方法和系统对桥梁挠度进行单点或多点测量,结果表明:测试单点纵向位移能达到20μm的分辨率,测试精度可达到0.1 mm。
In order to realize high precision of bridge deflection measurement,a new real-time monitoring system based on four-quadrant detector and GPRS is proposed.For the four quadrant detector itself,the system can realize 2-dimensional measurement and obtain both transverse displacement and deflection of the measured point.Further more the system can work under high frequency.The system can measure deflection at one position or more.In order to improve the measurement precision,deflection calculation methods of the actual system are introduced in the paper.The results show that the deflection monitoring system has high resolution of 20 μm and high measurement precision of 0.1 mm.
In order to realize high precision of bridge deflection measurement,a new real-time monitoring system based on four-quadrant detector and GPRS is proposed.For the four quadrant detector itself,the system can realize 2-dimensional measurement and obtain both transverse displacement and deflection of the measured point.Further more the system can work under high frequency.The system can measure deflection at one position or more.In order to improve the measurement precision,deflection calculation methods of the actual system are introduced in the paper.The results show that the deflection monitoring system has high resolution of 20 μm and high measurement precision of 0.1 mm.
引文
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[17]Kenneth Leitch.Close-range photo-gramnetric measurement ofbridge deformations[D].Saarbrucken:LAP Lambert AcademicPublishing,2010,75-122.
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[2]XIONG Xian-cai,ZHANG Peng,FU Yu-mei,et al.Optoelectronicliquid-level sensor and its application for automatically measur-ing bridge deflection[J].Earthquake Engineer and Engineer Vi-bration,2006,26(4):260-264.熊先才,章鹏,苻欲梅,等.光电液位传感器及其在桥梁度自动测量中的应用[J].地震工程与工程振动,2006,26(4):260-264.
[3]ZENG Wei,YU De-jie,HU Bai-xue.An auto-monitoring systembased on the communicating pipe principle of bridge deflection[J].Journal of Hunan University,2007,34(7):44-47.曾威,于德介,胡柏学.基于连通管原理的桥梁挠度自动监测系统[J].湖南大学学报,2007,34(7):44-47.
[4]LAN Zhang-li,ZHANG Hong,ZHOU Jian-ting.Novel system formeasuring bridge deflections based on laser and video[J].Chi-nese Journal of Scientific Instrument,2009,30(19):2405-2410.蓝章礼,张洪,周建庭.基于激光和视频的桥梁挠度测量新系统[J].仪器仪表学报,2009,30(19):2405-2410.
[5]ZHANG Ben-niu,LI Xing-xing,SONG Jun,et al.Applicationstudy on laser projection sensor for bridge deflection detection[J].Chinese Journal of Sensors and Actuations,2009,22(5):755-759.张奔牛,李星星,宋军,等.激光投射式位移传感技术在桥梁挠度检测中的应用研究[J].传感技术学报,2009,22(5):755-759.
[6]YE Gui-ru,ZHOU Yu-long.Application of inclinometer in deflec-tion test for long-span bridges[J].Journal of Highway andTransportation Research and Development,2009,26(11):103-107.叶贵如,周玉龙.倾角仪在大跨度桥梁挠度检测中的应用[J].公路交通科技,2009,26(11):103-107.
[7]YU Jia-yong,ZHU Jian-jun,ZOU Zheng-rong,et al.Research onthe new deflection measurement method for large span bridge[J].Journal of Hunan University,2007,34(10):31-34.余加勇,朱建军,邹峥嵘,等.大跨径桥梁挠度测量新方法研究[J].湖南大学学报,2007,34(10):31-34.
[8]YANG Jian-chun,CHEN Wen-min.Status and development ofauto-monitoring technology for bridge deflection[J].Transduc-er and Microsystem Technologies,2006,25(9):1-3.杨建春,陈伟民.桥梁结构挠度自动监测技术的现状与发展[J].传感器与微系统,2006,25(9):1-3.
[9]LV Chen-gang,ZHANG Rui-feng,LI Ke-jia,et al.Health monito-ring of pile structure based on FBG sensor network[J].Journalof Optolectronics.Laser,2010,21(11):1668-1671.吕振刚,张瑞峰,李可佳,等.光纤光栅传感网络对桥桩结构的健康检测[J].光电子.激光,2010,21(11):1668-1671.
[10]WANG Xiao-jie,ZENG Jie,LIANG Da-kai,et al.Fiber Bragggrating pressure sensor for load monitoring of asphalt pave-ment[J].Journal of Optolectronics.Laser,2011,22(2):197-200.王晓洁,曾捷,梁大开,等.用于沥青路面载荷监测的光纤光栅压力传感器[J].光电子.激光,2011,22(2):197-200.
[11]YANG Xue-shan,HOU Xing-min,LIAO Zhen-peng,et al.A newmethod for bridge deflection measurement[J].China Civil En-gineering Journal,2002,35(2):92-96.杨学山,侯兴民,廖振鹏,等.桥梁挠度测量的一种新方法[J].土木工程学报,2002,35(2):92-96.
[12]KAI Yuen-wong,KING Leung-man,WAI Yee-chan.MonitoringHong Kong′s bridges:Real-time kinematic spans the gap[J].GPS World,2001.
[13]Meng X,Dodson A H,Roberts G W.Detecting bridge dynamicswith GPS and triaxial accelerometers[J].Engineering Struc-tures,2007,29(11):3178-3184.
[14]Stanton J F,Eberhard M O,Barr P J.A weighted-stretched-wire system for monitoring deflections[J].Engineering Struc-tures,2003,25:347-357.
[15]Whiteman T,Lichti D D,Chandler I.Measurement of deflectionin concrete beams by close-range digital photogrammetry[J].Symposium on Geospatial Theory,Processing and Applications[C].2002,22-26.
[16]JIANG Rui-nian.Development of a digital photogrammetric sys-tem for bridge deflection measurement[D].Ann Arbor,Mich.:UMI.2006,54-80.
[17]Kenneth Leitch.Close-range photo-gramnetric measurement ofbridge deformations[D].Saarbrucken:LAP Lambert AcademicPublishing,2010,75-122.
[18]Richard J V,Mayrai G,Hani N,et al.An algorithm for estima-ting bridge deflection from accelerometer measurements[A].Fortieth Asilomar Conference on Signals,Systems and Com-puters[C].2006,540-544.
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