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The Design of the Drive Sofeware of Broadband Electromagnetic Transmitter

Author: ChenGuangYuan
Tutor: DengMing
School: Chinese Geology University (Beijing)
Course: Information and Communication Engineering
Keywords: Broadband Electromagnetic transmitter ARM7 AVR LABVIEW
CLC: P631.325
Type: Master's thesis
Year: 2011
Downloads: 34
Quote: 0
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Abstract


A borehole surface electromagnetic method began in Russia, is widely used in the oil and gas exploration, electromagnetic detection method, introduced into China in the 1990s. The principle is that \In order to further study the borehole surface electromagnetic method, our the indoor well surface electromagnetic method the physical analog integrated system. The borehole surface electromagnetic method of three-dimensional physical analog integrated system consists of broadband electromagnetic transmitter and receiver. In the tank test chamber, broadband electromagnetic transmitter is used as the excitation field source is sent to the sink in the indoor experiment inverter rectangular waves of different frequencies, to procure different resistivity medium occur under the sink excitation intensification effect, generate secondary field . Conventional electromagnetic transmitter is the emission frequency of the current is fixed in a very limited number of points, while the the broadband electromagnetic transmitter's frequency between 1/128Hz to 8192Hz according 2n is changed, only a wider frequency range, frequency selection. The corresponding function of the transmitter in its hardware based on the development of process control software, broadband electromagnetic transmitter driver software. The software program is divided into the following three aspects: ARM Advanced Microcontroller controller as a core part of the control board for the LCD screen display, keyboard input and output parameter and operating instructions, information collection through the serial port and auxiliary board timed operation of the host computer communication, timer, and synchronized with the GPS receiver in real time clock and other operations. The AVR RISC collection and storage of high-speed single-chip controller for controlling the auxiliary board supply voltage supply current, forward and reverse supply current and the instruments internal temperature. In the auxiliary plate, further comprising the CPLD as the core of the program design, primarily responsible for generating the the IPM auxiliary control signal, i.e., through the accuracy of the crystal oscillator frequency, to generate a precise frequency signal, thereby controlling the IPM drive circuit that drives the IPM normal working. Broadband electromagnetic transmitter through the Labview graphical editing language to write the PC interface is used to control the operation of the next-bit machine. Achieve features include lower real-time data transmission between the machine and complete the data stored on the computer.

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Electrical prospecting > Method > Electromagnetic Method
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