Design Of Wireless Communication Telemetric Distributed Induced Polarization Instrument

The excitation polarization method referred to as the induced polarization methodis the difference of the induced polarization effect of the different rocks in the crust, orematerial foundation, established through the observation and study of artificial DC(time domain) or AC (frequency domain) the distribution of excited electric fieldprospecting and geological problems, a group of electrical prospecting branch method.The practice has proved that the induced polarization method is to survey the varioustypes of metal ores, especially the difference between the resistivity and thesurrounding rock small dip-type metal deposits, compared with the resistivity andelectromagnetic method more effective. In addition, the induced polarization methodare looking for natural gas, groundwater and detect oil fields can play a role, and haveachieved satisfactory resultsThe paper focused on the theory and characteristics of the time-domain spectrumofIPlaw, access has been stimulated electrical equipment on the basis ofanalysis oftheadvantages and disadvantages of the related instrument, developed a set of distributedIP instrument. Rock, ores or specimens induced polarization effect of the secondaryfield observations, can also be achieved as the polarizability and resistivitymeasurements. The IPinstrument contains three separate sections ofthetransmitter andreceiver, and USB to wireless transceiver module. Among them, the core of the controlof the transmitter and receiver are used more commonly used industrial C8051F020microcontroller, with large-screen LCD and keyboard operation, facilitate the human-computer interaction and observation data. Both GPS and wireless synchronization ofsynchronous acquisition of the system. GPS time synchronization, the synchronizationprecision can reach to0.2us; taking into account the complex field of environmentalGPS might have received a slow signal, the design of the wireless synchronization as a substitute. Wireless transmission to the receiver, the collected data is sent to the PC,which greatly facilitates the field exploration, the site of the power law data processingcapabilities to enhance the work efficiency.The transmitter of the induced polarization method for electrical prospectingperson workshops sources, is an important part of the induced polarization methodinstrument, the transmitter output signal quality will directly affect the results of thereceiver collected signal. The full set of transmitter by the MCU control module andpower supply module is composed of two parts, generator220VAC input, through therectifier transformer and rectifier output up to900V voltage IGBT modules convert thedual polarity of the pulse signal, to achieve transmitter high-power transmission,expansion of the system detection range. Collection, collection point voltage at thereceiver side, as the polarization ratio and the apparent resistivity measurement, usingthe optional GPS and wireless synchronization acquisition, and24-bit AD converterchip to achieve a the precision of the data collection, and collection results aredisplayed in the LCD interface, using a wireless network to transfer data to the PC, thereceiver can be observed spontaneous potential, in the acquisition of natural potentialcompensation. The system uses the the ZF02wireless module components of wirelessnetworks, its interface is well adapted to the development of this design. The design ofthe PC-side USB to wireless transceiver card, wireless data transmission between thereceiver and PC.Finally, an instance of the whole test system designed to get more satisfactoryexperimental results laid the foundation for future exploration applications and furtherfunctional development.