本文選題：地下電纜 + 地震檢波器�。� 參考：《浙江大學(xué)》2017年碩士論文

【摘要】：地下電纜是城市電力系統(tǒng)的主要組成之一,地下電纜配電方式有效的解決了城市用地的緊張與電力供電走廊占地的矛盾,同時(shí)也避免了極端惡劣天氣對(duì)供電系統(tǒng)造成的惡劣影響,極大的提高了配電系統(tǒng)的可靠性。與此同時(shí),隨著城區(qū)電纜線路的增多,市政道路施工時(shí),大型機(jī)械破壞地下電纜的情況也時(shí)有發(fā)生,給電網(wǎng)的安全運(yùn)行和施工人員的生命財(cái)產(chǎn)安全帶來(lái)嚴(yán)重威脅。本文針對(duì)地下電纜的鋪設(shè)特點(diǎn)及市政道路施工的流程,提出了一種基于地震檢波器陣列的施工源檢測(cè)技術(shù),通過(guò)檢測(cè)市政道路施工中破碎錘破壞硬質(zhì)路表所產(chǎn)生的振動(dòng)信號(hào)對(duì)施工源位置進(jìn)行定位并及時(shí)向相關(guān)部門(mén)發(fā)送預(yù)警以實(shí)現(xiàn)保護(hù)地下電纜的目的。其中主要研究?jī)?nèi)容如下:1)分析了地下電纜防外力破壞技術(shù)的國(guó)內(nèi)外研究現(xiàn)狀及不足。設(shè)計(jì)了一種通過(guò)檢測(cè)破碎錘對(duì)硬質(zhì)地表破碎過(guò)程中所產(chǎn)生的周期性脈沖信號(hào)以定位施工源位置以進(jìn)行預(yù)警的方案。2)分析了地震檢波器技術(shù)的研究現(xiàn)狀,對(duì)傳統(tǒng)檢波器和MEMS檢波器進(jìn)行詳細(xì)比較。3)對(duì)目前幾種常見(jiàn)的源定位算法進(jìn)行了深入的分析比較,考量了他們各自在算法時(shí)間復(fù)雜度、空間復(fù)雜度的優(yōu)劣。4)比較了目前常用的時(shí)延估計(jì)算法,選擇了最適合課題需求的基于小波變換的時(shí)延估計(jì)法。5)分別對(duì)直線陣、圓陣、十字陣三種檢波器陣列組合方式進(jìn)行了分析,討論了他們各自的適用環(huán)境。6)針對(duì)由891-2型檢波器組成的十字陣進(jìn)行實(shí)地實(shí)驗(yàn),考察其在不同距離、不同方向的定位性能。同時(shí)分別從實(shí)驗(yàn)環(huán)境、測(cè)量誤差、遠(yuǎn)場(chǎng)模型誤差、時(shí)延估計(jì)誤差的角度對(duì)實(shí)驗(yàn)數(shù)據(jù)進(jìn)行了誤差分析。7)根據(jù)上述研究?jī)?nèi)容,提出了一套基于地震檢波器陣列的地下電纜防外力破壞系統(tǒng)的設(shè)計(jì)方案,包括系統(tǒng)硬件設(shè)計(jì)、Linux操作系統(tǒng)移植、系統(tǒng)軟件設(shè)計(jì)。并在系統(tǒng)樣機(jī)的基礎(chǔ)上進(jìn)行了測(cè)試及誤差分析。
[Abstract]:Underground cable is one of the main components of urban power system. The distribution mode of underground cable effectively solves the contradiction between the tension of urban land use and the occupation of power supply corridor. At the same time, it avoids the bad influence of extreme bad weather on the power supply system, and greatly improves the reliability of the distribution system. At the same time, with the increase of cable lines in urban areas, the destruction of underground cables by large-scale machinery occurs from time to time during the construction of municipal roads, which poses a serious threat to the safe operation of power grids and the safety of life and property of construction personnel. In this paper, according to the laying characteristics of underground cable and the construction flow of municipal road, a construction source detection technology based on geophone array is proposed. The location of the construction source is located by detecting the vibration signal generated by the broken hammer in the construction of municipal roads and the alarm is sent to the relevant departments in order to protect the underground cable. The main research contents are as follows: 1. In this paper, a scheme of detecting periodic pulse signals produced by crushing hammer to locate the position of construction source to carry out early warning is designed. (2) the research status of geophone technology is analyzed. Comparing the traditional geophone and MEMS detector in detail. 3) deeply analyzing and comparing several common source location algorithms, and considering their time complexity. The space complexity. 4) compare the commonly used time delay estimation algorithms, select the best time delay estimation method based on wavelet transform. 5) the linear array, circular array, In this paper, three kinds of array combination of cross array geophone are analyzed, and their respective suitable environment. 6) the field experiment of cross array composed of 891-2 geophone is carried out, and its location performance in different distance and direction is investigated. At the same time, the experimental data are analyzed from the angles of experimental environment, measurement error, far-field model error and time-delay estimation error. This paper presents a design scheme of underground cable anti-damage system based on geophone array, including hardware design, Linux operating system transplantation and system software design. Based on the prototype of the system, the test and error analysis are carried out.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM75

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