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1、利用无线传感器网络实现大跨度桥梁的振动检测 学校代码：10904 机械工程测试技术课程设计利用无线传感器网络实现大跨度桥梁的振动检测姓 名：闫程贺学 号：201315310136指导教师：卢纪丽院系(部所)：机电工程学院专 业：机械设计制造及其自动化完成日期：2014.12.13摘要桥梁作为国家基础设施的重要组成部分，在国民经济和社会生活中的作用越来越重要，人们对大型桥梁的安全性、耐久性及正常使用功能日益关注和重视。对于大跨度桥梁的结构健康监测，传统的人工检测方法存在主观性强,整体性，时效性差等不足.目前广泛使用的有线健康监测在应用中也存在着布线难，系统易受环境影响等困难。利用无线传感器网络技
2、术对桥梁结构健康状态进行监测。不仅保留了有线健康监测的优点，而且弥补了其在应用中的不足。文章首先对整个系统的组成进行了说明，接着分别对无线传感器网络节点以及基站的组成和作用进行了说明。在此基础上，提出温度漂移对无线传感器网络节点的加速度传感器输出的影响，并对如何利用温度补偿技术来校准加速度传感器的输出值进行了探讨。且给出了数据校准前和数据校准后的对比图。接下来提出节点时钟同步的必要性，并对网络的时钟同步原理进行了探讨。在润扬长江大桥锚索上安装无线传感器网络，利用节点采集锚索的振动信息，并将其发送到基站节点。经数据分析可以得出锚索的振动频率，根据振动频率，便可以分析其受力情况，最终可以判断桥梁的
3、结构健康状态。关键词：桥梁无线测试系统 无线通信 数据采集AbstractAs an important part of the national infrastructure of the bridge, and role in the national economy and social life of the more important, people on the large bridge safety, durability and function of normal use of increasing concern and attention. For structural
4、 health monitoring of long-span bridges, the traditional manual detection method such as strong subjectivity, integrity, lack of poor timeliness. Cable health monitoring is currently widely used in the application also exists in the wiring is difficult, the system is easily affected by environment a
5、nd so difficult. Monitoring the health state of bridge structure by using the technology of wireless sensor network. Not only retains the advantages of cable health monitoring, and make up for the deficiencies in the application. Firstly, on the composition of the whole system are described, then th
6、e wireless sensor network node and the base station components and functions are described. On this basis, the influence of temperature drift of accelerometer output is proposed for wireless sensor network node, output and to calibrate the acceleration sensor on how to use the technique of temperatu
7、re compensation value is discussed. And gives the comparison of data before and after calibration the calibration data. Then put forward the necessity of node clock synchronization, and clock synchronization principle of network are discussed. The installation of wireless sensor network in cable, us
8、ing the vibration information acquisition of anchor nodes, and send it to the base station node. Through the data analysis of vibration frequency can be obtained according to the anchor cable, vibration frequency, can force analysis, structural health state eventually can determine the bridge.Keywor
9、ds: wireless communication data acquisition and wireless measurement system for bridgetheir own conditions to develop the correct road, the maximum to avoid investment risk, gain profit.(three) vigorously promote the brand. To establish brand awareness, awareness of the use of brand, brand value, br
10、and acquisition performance, enhance the competitive strength. Concentrated manpower, careful planning, packaging and publicity of a number of unique, market influence and coverage of the brand, the implementation of key breakthroughs, to enhance the competitive strength, walking business road the c
11、ompetition of alienation and characteristics, the pursuit of stability and development of the market.(four) to promote the integration of resources. To further broaden their horizons, effective integration of resources within the group, the city resources, other industries and regional resources, mu
12、tual trust, mutual benefit, seeking win-win principle, in the framework of national policies and regulations, strict inspection and argumentation, legal consultation, examination and approval procedures, strict regulation of economic activities, attract injection the social investment to the industr
13、y group, to achieve leveraging the development, ensure that the value of state-owned assets.(five) to strengthen the construction management personnel. Strengthen the management of education and training of cadres and workers of the existing business, firmly establish the concept of the market, enha
14、nce the sense of crisis to adapt to market competition, the sense of urgency, improve the ability to respond to market competition, improve management and operation of the market. At the same time, according to the need of industrial development, vigorously the introduction of high-quality managemen
15、t management personnel, and strive to build a high-quality professional management team, hard work, and promote the entire workforce knowledge structure, age structure, structure optimization and upgrading ability, enhance core competitiveness, adapt to the need of market competition.(six) seriously
16、 study the policy for policy. Serious research about social support the development of cultural undertakings in the country and the XX policy, especially the policy of industrial development, financial investment policy, financial policy and tax policy, and actively seek policy, projects and funds, enterprise and industry group mission to promote leapfrog development.目录1桥梁结构振动监测中无线传感
