【摘要】：目前隨著國家對基礎(chǔ)設(shè)施建設(shè)的重視和關(guān)注,越來越多的公路橋梁、鐵路橋梁等工程開始實(shí)施建設(shè),同時(shí)交通部、建設(shè)部同樣出臺國家或者行業(yè)規(guī)范,要求對在建橋梁和部分已交付運(yùn)營的成橋增加結(jié)構(gòu)安全監(jiān)測系統(tǒng),以保證橋梁使用安全性。其中對于懸索斜拉橋、吊桿拱橋的纜索所受荷載監(jiān)測是一個(gè)關(guān)鍵和必要的監(jiān)測項(xiàng)之一,可見橋梁纜索荷載監(jiān)測的必要性。本文首先分析了橋梁纜索荷載監(jiān)測系統(tǒng)實(shí)現(xiàn)的現(xiàn)狀,在對比現(xiàn)有監(jiān)測系統(tǒng)方法的基礎(chǔ)上,提出了一種基于LORA無線傳輸?shù)姆植际奖O(jiān)測系統(tǒng),通過分布式網(wǎng)絡(luò)傳輸、振弦傳感器實(shí)現(xiàn)荷載感知、采集模塊實(shí)現(xiàn)采集等問題的研究,給出了系統(tǒng)的設(shè)計(jì)實(shí)現(xiàn)方法。并對振弦頻率信號采集的算法、數(shù)字濾波算法進(jìn)行分析和推導(dǎo),實(shí)現(xiàn)了對荷載測量的準(zhǔn)確性。其次,系統(tǒng)為一種工程荷載監(jiān)測系統(tǒng),因此對原始數(shù)據(jù)的存儲、傳輸?shù)目煽啃砸蟾叩忍攸c(diǎn),設(shè)計(jì)了數(shù)據(jù)傳輸機(jī)制、數(shù)據(jù)備份功能,以保證數(shù)據(jù)無丟失、可追溯的功能。整體監(jiān)測系統(tǒng)最終可實(shí)現(xiàn)荷載感知、信號采集、無線傳輸、數(shù)據(jù)展示分析等完整信號鏈獲取功能,并通過無線傳輸、內(nèi)置鋰電池供電、太陽能充電等設(shè)計(jì),實(shí)現(xiàn)分布式安裝,大大提高了工程實(shí)施的便捷性和實(shí)用性。最后,本系統(tǒng)在河北白鹿板山吊橋項(xiàng)目上得到了引用,達(dá)到了設(shè)計(jì)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.
【學(xué)位授予單位】：南昌大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U446

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