摘要
为了对关头坝大桥的结构健康状态和安全寿命作出正确评估,如实反映大桥的结构安全状态和运营安全信息,建立了桥梁振动监测系统。通过对大桥进行结构危险性分析,确定7个监测断面,布置14个3轴加速度传感器。设计了关头坝大桥振动监测系统数据采集及传输模块,此模块由12位精度模数转换芯片、89C52、RS232、DS1216等芯片组成,完成一次数据采集共需约5ms。设计了大桥数据采集与分析管理系统,可对监测数据进行分析评估,为桥梁的养护、维修与管理提供决策。监测数据结果表明:桥梁振动监测系统可以实时地对桥梁结构状态进行监测与评估,为大桥在特殊气候、特殊交通条件下或运营状况严重异常时触发预警信号。目前,该系统正在为大桥的运营、管理和维护提供决策依据,对确保大桥的安全运营发挥着重要作用。
In order to make correct assessment of Guantouba bridge structure＇s health and safety condition,and to reflect the feature information of the structure state,the bridge vibration monitor system was designed.According to the risk analysis results of the bridge structure,seven monitoring sections were determined and fourteen three-axis acceleration sensors were arranged.The data acquisition and transmission module was designed which consisted of 12 bits A/D chip,89C52,RS232 and DS1216 etc.It only needed 5 milliseconds to complete one data acquiring procedure.The data acquisition and analysis system could analyze and evaluate the monitoring data to make decisions for the bridge maintenance and management.The results show that the system can carry out the task of the bridge structure realtime monitoring and evaluating.It will trigger warning signal when the bridge is in special climate or dangerous traffic conditions.This system can provide basis for making decisions about the bridge operation,management and maintenance.It plays a very important role in ensuring the traffic safety on the bridge and the bridge operation security.1 tab,3 figs,11 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第3期106-110,共5页
Journal of Chang’an University(Natural Science Edition)
基金
陕西省交通厅科技计划项目(08-04K)
关键词
机械工程
关头坝大桥
振动监测
加速度传感器
安全报警
mechanical engineering
Guantouba bridge
vibration monitoring system
acceleration sensor
safety alarming
