The Design And Implementation Of Software Platform Of Underground Source Localization Based On Distributed Sensors

Distributed underground source localization is a method of test and measurement, which is based on the group sensors consisting of a wireless network and aiming at measuring the focal position. It has been an important topic of the research at home and abroad.It’s widely used in oilfield development, tunnel detection and mine detection.Due to the risk of underground explosion, limits of large area ground test, it prevents experimenters from controlling each sensor, and there is no guarantee of unity of time. We need a set of completely distributed subsurface source localization software platform to monitor、control、signal processing to complete the entire test experiment,which has strongly engineering application value and research significance.According to the actual project requirements, the underground source localization need to complete the management of wireless sensor nodes, the extraction of primary wave, management and storage of vibration sensor signals, ultimately achieving high-precision positioning through signal data processing.In this paper,, we design the underground source localization system using distributed sensors based on the LabVIEW software development platform. It mainly includes four aspects: sensor nodes control to send and receive data transmission, display processing of sensors, signal analysis and processing, design of database and so onIn the aspect of system transceiver control, software platform is mainly completed the system transceiver control process and the design of the control instruction. In the aspect of sensors’ display, it is mainly completed the sensors’ coordinate transformation, two-dimensions and tree-dimensions coordinate display and other functions.In terms of signal analysis and processing, it is completed the read and display of vibrative signal waveform, including single-channel waveform display and multi-channel waveform display, time domain analysis of vibration signal, including correlation, frequency domain analysis of vibration signal, including the fast Fourier transform(FFT) and spectrum analysis, time and frequency domain analysis of vibration signal, including the short-time Fourier transform(STFT). In terms of signal processing, it is completed filtration and wavelet denoise. It also realized the effective extraction of primary and the source location.In the aspect of database, it implements the vibration signal of store display, add and delete functions of experimental information, effectively improving the efficiency of data storage management.Engineering test shows that the design of the underground of distributed sensor positioning software can complete the basic function of the source location effectively,and meet the demand of engineering testing.