无线分布式桥梁缆索荷载监测系统

发布时间：2018-11-08 16:40

【摘要】：目前随着国家对基础设施建设的重视和关注,越来越多的公路桥梁、铁路桥梁等工程开始实施建设,同时交通部、建设部同样出台国家或者行业规范,要求对在建桥梁和部分已交付运营的成桥增加结构安全监测系统,以保证桥梁使用安全性。其中对于悬索斜拉桥、吊杆拱桥的缆索所受荷载监测是一个关键和必要的监测项之一,可见桥梁缆索荷载监测的必要性。本文首先分析了桥梁缆索荷载监测系统实现的现状,在对比现有监测系统方法的基础上,提出了一种基于LORA无线传输的分布式监测系统,通过分布式网络传输、振弦传感器实现荷载感知、采集模块实现采集等问题的研究,给出了系统的设计实现方法。并对振弦频率信号采集的算法、数字滤波算法进行分析和推导,实现了对荷载测量的准确性。其次,系统为一种工程荷载监测系统,因此对原始数据的存储、传输的可靠性要求高等特点,设计了数据传输机制、数据备份功能,以保证数据无丢失、可追溯的功能。整体监测系统最终可实现荷载感知、信号采集、无线传输、数据展示分析等完整信号链获取功能,并通过无线传输、内置锂电池供电、太阳能充电等设计,实现分布式安装,大大提高了工程实施的便捷性和实用性。最后,本系统在河北白鹿板山吊桥项目上得到了引用,达到了设计所期望的功能要求。
[Abstract]:At present, with the attention and attention of the state to the construction of infrastructure, more and more projects such as highway bridges, railway bridges and other projects begin to be implemented. Meanwhile, the Ministry of Communications and the Ministry of Construction have also issued national or industrial norms. In order to ensure the safety of the bridge, the structural safety monitoring system should be added to the bridge under construction and part of the completed bridge that has already been put into operation. For suspension cable-stayed bridge, the cable load monitoring of suspension arch bridge is one of the key and necessary monitoring items, which shows the necessity of cable load monitoring. In this paper, the current situation of bridge cable load monitoring system is analyzed, and a distributed monitoring system based on LORA wireless transmission is proposed based on the comparison of existing monitoring system methods. In this paper, the method of design and implementation of the system is presented, which realizes the load sensing by vibrating string sensor and the acquisition module by the acquisition module. The algorithm of frequency signal acquisition and digital filtering algorithm are analyzed and deduced, and the accuracy of load measurement is realized. Secondly, the system is a kind of engineering load monitoring system. Therefore, the data transmission mechanism and data backup function are designed to guarantee the function of data no loss and traceability. The whole monitoring system can realize the complete signal chain acquisition function, such as load sensing, signal acquisition, wireless transmission, data display and analysis, and realize distributed installation through wireless transmission, built-in lithium battery power supply, solar charging and so on. It greatly improves the convenience and practicability of project implementation. Finally, the system has been used in Hebei Bailu Banshan suspension bridge project, which meets the expected functional requirements of the design.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U446

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