本文選題：橋梁振動　切入點：晶體諧振器　出處：《西南交通大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：橋梁作為一種耗資巨大、設(shè)計建造周期和使用年限都很長的大型基礎(chǔ)交通設(shè)施,在促進(jìn)國民經(jīng)濟(jì)建設(shè)、地域文化交流和推動社會發(fā)展中發(fā)揮著極為重要的作用。橋梁結(jié)構(gòu)振動是影響橋梁的使用和安全的重要因素之一,對橋梁振動進(jìn)行實時監(jiān)測對于避免橋梁事故的發(fā)生和延長其使用壽命有著極其重要的意義。PQCR-PSI傳感器是實驗室開發(fā)的一種結(jié)構(gòu)簡單、具有大感頻牽引率的電感式傳感器,它實現(xiàn)了電感式傳感器的數(shù)字化頻率輸出,克服了以交流電橋和LC諧振為振蕩電路的電感傳感器的一些缺陷,系統(tǒng)將其作為傳感器探頭應(yīng)用到了橋梁振動等低頻振動測量中。通過對橋梁振動特性與現(xiàn)有振動傳感器優(yōu)缺點的分析,針對大跨度橋梁振動信號監(jiān)測的需求,提出并設(shè)計了一套基于PQCR-PSI傳感器的橋梁振動無線監(jiān)測系統(tǒng)。根據(jù)橋梁振動監(jiān)測系統(tǒng)的需求與ZigBee技術(shù)的原理,系統(tǒng)硬件由振動監(jiān)測節(jié)點、應(yīng)力應(yīng)變監(jiān)測節(jié)點、協(xié)調(diào)器節(jié)點三個部分組成。振動監(jiān)測節(jié)點使用FPGA對PQCR-PSI結(jié)構(gòu)所在Pierce振蕩電路進(jìn)行頻率采集,同時實現(xiàn)了溫度數(shù)據(jù)采集、數(shù)據(jù)處理、USB存儲和串口數(shù)據(jù)發(fā)送等功能。應(yīng)力應(yīng)變監(jiān)測節(jié)點主要由全臂電橋電路、電壓放大電路和模數(shù)轉(zhuǎn)換電路組成。振動數(shù)據(jù)與應(yīng)力應(yīng)變數(shù)據(jù)通過ZigBee無線通信的方式發(fā)送給協(xié)調(diào)器節(jié)點,協(xié)調(diào)器接收后通過串口發(fā)送給計算機(jī)。通過C#上位機(jī)與MATLAB的混合編程,將模糊推理融合理論應(yīng)用于模擬橋梁狀態(tài)評估與預(yù)警,同時,上位機(jī)實現(xiàn)了各數(shù)據(jù)的動態(tài)曲線繪制和MySQL數(shù)據(jù)庫存儲等功能。通過搭建模擬平臺進(jìn)行實驗和測試,驗證了將基于PQCR-PSI結(jié)構(gòu)的電感式傳感器探頭應(yīng)用到橋梁振動測量的可行性。該套監(jiān)測系統(tǒng)可清楚地反映出橋梁模擬振動情況,實現(xiàn)了對低頻振動信號的非接觸式無線實時監(jiān)測。
[Abstract]:As a kind of large infrastructure transportation facilities, which cost a lot of money and have a long design and construction life, bridge is promoting the construction of national economy. Regional cultural exchanges and social development play an extremely important role. Bridge structural vibration is one of the important factors affecting the use and safety of bridges. It is very important to monitor bridge vibration in real time for avoiding bridge accident and prolonging its service life. PQCR-PSI sensor is a kind of inductive sensor with simple structure and large frequency traction rate developed in laboratory. It realizes the digital frequency output of inductance sensor and overcomes some defects of inductance sensor which uses AC bridge and LC resonance as oscillating circuit. The system uses it as a sensor probe to measure low frequency vibration such as bridge vibration. By analyzing the characteristics of bridge vibration and the advantages and disadvantages of existing vibration sensors, the paper aims at the needs of vibration signal monitoring of long-span bridges. A wireless monitoring system of bridge vibration based on PQCR-PSI sensor is proposed and designed. According to the requirement of bridge vibration monitoring system and the principle of ZigBee technology, the hardware of the system is composed of vibration monitoring node and stress strain monitoring node. The vibration monitoring node uses FPGA to collect the frequency of the Pierce oscillation circuit where the PQCR-PSI structure is located, and the temperature data acquisition is realized at the same time. Data processing functions such as USB storage and serial port data transmission. The stress-strain monitoring node is mainly composed of a full-arm bridge circuit. The vibration data and the stress-strain data are transmitted to the coordinator node through ZigBee wireless communication, and the coordinator receives them to the computer through serial port. Through the mixed programming of C # host computer and MATLAB, the vibration data and the stress-strain data are transmitted to the computer through the serial port. The fuzzy inference fusion theory is applied to simulate bridge state evaluation and early warning. At the same time, the upper computer realizes the functions of dynamic curve drawing and MySQL database storage of each data. The feasibility of applying the inductance sensor probe based on PQCR-PSI structure to bridge vibration measurement is verified. The monitoring system can clearly reflect the simulated vibration of the bridge and realize the non-contact wireless real-time monitoring of the low frequency vibration signal.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP274

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張俊;;光纖光柵傳感器在橋梁振動監(jiān)測中的應(yīng)用研究[J];交通科技;2016年06期

2 汪嘉洋;劉剛;華杰;劉冰;張家林;穆文君;;振動傳感器的原理選擇[J];傳感器世界;2016年10期

3 馬文卓;陳向東;丁星;;基于FPGA的平面螺旋電感式微位移傳感器系統(tǒng)[J];傳感器與微系統(tǒng);2016年06期

4 伍琦敏;;淺談橋梁健康監(jiān)測系統(tǒng)的現(xiàn)狀及發(fā)展方向[J];江西建材;2016年10期

5 韓基剛;;大跨橋梁結(jié)構(gòu)健康監(jiān)測的研究進(jìn)展[J];民營科技;2016年04期

6 余加勇;邵旭東;晏班夫;朱平;;基于全球?qū)Ш叫l(wèi)星系統(tǒng)的橋梁健康監(jiān)測方法研究進(jìn)展[J];中國公路學(xué)報;2016年04期

7 吳來義;丁幼亮;王高新;;大跨度橋梁健康監(jiān)測與狀態(tài)評估研究展望[J];山西建筑;2015年17期

8 王欣威;慕麗;;基于電渦流傳感器的低頻微振動測試系統(tǒng)設(shè)計[J];裝備制造技術(shù);2015年05期

9 張鵬富;;淺談藍(lán)牙技術(shù)的發(fā)展現(xiàn)狀和前景[J];計算機(jī)光盤軟件與應(yīng)用;2014年16期

10 費玉潔;;基于GPRS與Zigbee技術(shù)的家庭智能安防設(shè)計[J];科技創(chuàng)新導(dǎo)報;2014年17期

相關(guān)碩士學(xué)位論文 前10條

1 吳強(qiáng)強(qiáng);橋梁健康監(jiān)測數(shù)據(jù)處理方法研究及軟件開發(fā)[D];華南理工大學(xué);2016年

2 韓晶;適用于橋梁振動監(jiān)測的光纖加速度傳感器研究[D];石家莊鐵道大學(xué);2015年

3 杜鵬;基于高取向生長的納米TiO_2濕度傳感系統(tǒng)設(shè)計與實現(xiàn)[D];西南交通大學(xué);2015年

4 陳萍萍;80MHz低相位噪聲晶體振蕩器的設(shè)計與實現(xiàn)[D];電子科技大學(xué);2015年

5 陳高杰;基于無線傳感器網(wǎng)絡(luò)的橋梁振動檢測系統(tǒng)研究[D];浙江大學(xué);2015年

6 陳帥;電磁式橋梁振動能獲取的研究[D];燕山大學(xué);2014年

7 趙晶;基于FPGA的多路QCM濕度傳感器設(shè)計與實現(xiàn)[D];西南交通大學(xué);2013年

8 邵州華;多傳感器數(shù)據(jù)融合算法的研究與應(yīng)用[D];東北大學(xué);2013年

9 邢變麗;基于Mamdani模糊推理的汶川滑坡敏感性研究[D];首都師范大學(xué);2013年

10 王研;基于固有頻率變化的橋梁損傷識別[D];華東交通大學(xué);2012年

，

本文編號：1573299