Protection System Of Underground Cable Based On Geophones Array

Underground cable is one of the main components of the city power supply system.Transmitting electricity by underground cable can save land and protect cable from adverse environment.But the underground cable is often damaged by large machinery in the road construction.To protect the underground.cable,this thesis proposes the design of an intelligent system that basing on geophone array.By detecting the vibration signal generated by the broken hammer in the road construction we can locate the road construction and send warning to the electricity sector to protect the underground cable from being damaged.The research is listed as follows:1)Analyzed the present situation and shortcomings of underground cable anti-external force destruction technology.Designed a set of early warning scheme for locating the location of the construction source by detecting the construction signal of the hammer.2)The research status of geophone technology is analyzed,and the traditional detector and MEMS detector are compared in detail.3)Several kinds of common source localization algorithms are analyzed and compared deeply,taking into account their respective algorithm time Complexity and complexity of space.4)Compared several common time-delay estimation algorithm,we choose the time-delay estimation based on wavelet transform which is the most suitable subject Method.5)Compared the commonly used time delay estimation algorithm,the time-delay estimation method based on wavelet transform is selected.6)The field experiment was carried out for the cross composed of 891-2 type detector,and its positioning performance in different distance and different direction was investigated,the error analysis is carried out for the experimental data.7)According to the above research contents,a design scheme of underground cable anti-external damage system based on geophone array is proposed,which includes system hardware design,Linux operating system transplantation and system software design.And the test and error analysis were carried out on the basis of the system prototype.