Analysis Of Plane Vibration Location Based On Multi Vibration Sensor

The principle of vibration target location detection technology based on multi sensor is vibration signal collection based on vibration sensor,to find and locate the vibration target.This technology can not only strengthen the operational reconnaissance capability,but also has a very good application prospect in the field of environmental monitoring,warehouse monitoring,bridge monitoring and other fields.The main content of this design is two-dimensional plane vibration target positioning,that is to say,the vibration source and vibration sensor are on the same horizontal plane.We firstly introduce the propagation characteristics of vibration signal in the earth medium,to determine the Rayleigh wave as the collected.Then,the paper analyzes and compares 4 kinds of planar classical localization algorithms,and the localization algorithm based on the time difference of arrival is emphasized to discuss.Finally,the cross-correlation algorithm is used to determine the time difference of arrival.This design mainly includes the hardware and software design of the lower computer and the software design of the upper computer.The main task of the lower computer is according to the command sent by the upper computer,through the STM32 driving AD7656 chip to convert the analog signal collected by the vibration sensor,then the vibration data is sent to the host computer for analysis.And the main task of the upper computer is to send commands to the lower computer,and receive the data sent by the lower computer through the serial port,then analyze it and get the location information.In order to collect and convert the data conveniently,we integrate the vibration sensor,analog signal conditioning circuit,A/D conversion chip,microprocessor and power supply into a hardware circuit board.In order to analyze the data more quickly and accurately,we use the MATLAB software to carry on the cross-correlation analysis to the collected vibration waveform,and calculate the final position information.Finally,we make functional testing of the system,the lower computer can start or end the vibration position detecting according to the command of the upper computer,and send the effective vibration data to the upper computer after vibration position detecting,and the upper computer can draw the waveform of the vibration signal and cross correlation analysis,then finally get the information of the vibration position.