基于检波器阵列的地下电缆防外力破坏系统

发布时间：2018-05-06 21:24

本文选题：地下电缆 + 地震检波器　；参考：《浙江大学》2017年硕士论文

【摘要】：地下电缆是城市电力系统的主要组成之一,地下电缆配电方式有效的解决了城市用地的紧张与电力供电走廊占地的矛盾,同时也避免了极端恶劣天气对供电系统造成的恶劣影响,极大的提高了配电系统的可靠性。与此同时,随着城区电缆线路的增多,市政道路施工时,大型机械破坏地下电缆的情况也时有发生,给电网的安全运行和施工人员的生命财产安全带来严重威胁。本文针对地下电缆的铺设特点及市政道路施工的流程,提出了一种基于地震检波器阵列的施工源检测技术,通过检测市政道路施工中破碎锤破坏硬质路表所产生的振动信号对施工源位置进行定位并及时向相关部门发送预警以实现保护地下电缆的目的。其中主要研究内容如下:1)分析了地下电缆防外力破坏技术的国内外研究现状及不足。设计了一种通过检测破碎锤对硬质地表破碎过程中所产生的周期性脉冲信号以定位施工源位置以进行预警的方案。2)分析了地震检波器技术的研究现状,对传统检波器和MEMS检波器进行详细比较。3)对目前几种常见的源定位算法进行了深入的分析比较,考量了他们各自在算法时间复杂度、空间复杂度的优劣。4)比较了目前常用的时延估计算法,选择了最适合课题需求的基于小波变换的时延估计法。5)分别对直线阵、圆阵、十字阵三种检波器阵列组合方式进行了分析,讨论了他们各自的适用环境。6)针对由891-2型检波器组成的十字阵进行实地实验,考察其在不同距离、不同方向的定位性能。同时分别从实验环境、测量误差、远场模型误差、时延估计误差的角度对实验数据进行了误差分析。7)根据上述研究内容,提出了一套基于地震检波器阵列的地下电缆防外力破坏系统的设计方案,包括系统硬件设计、Linux操作系统移植、系统软件设计。并在系统样机的基础上进行了测试及误差分析。
[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.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM75

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