A portable three-dimensional acoustic logging tool on-site maintenance device
A technology for acoustic logging tools and maintenance devices, which is applied to program control devices, measurements, instruments, etc., and can solve the problems of large amount of 3D acoustic logging data, long EDIB bus transmission time, complex logging environment of 3D acoustic logging tools, etc. problems, to achieve the effect of convenient on-site maintenance and high-speed transmission
Active Publication Date: 2019-06-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
[0005] The logging environment of the 3D acoustic logging tool is complex, and the maintenance device itself needs to provide signal sources for the downhole tools during field testing. Therefore, the DDS signal source is designed and implemented inside the FPGA to provide acoustic signals to the downhole tools; It is connected to the EDIB bus to communicate with the ground system, but the 3D acoustic logging data volume is large, and the EDIB bus takes a long time to transmit. Therefore, in order to meet the transmission rate requirements, high-speed data transmission, including downhole instruments and detection devices, must be realized. Mcbsp high-speed transmission between, and SPI high-speed transmission between FPGA and ARM processor in the detection device
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[0025] For the convenience of description, the relevant technical terms appearing in the specific implementation are explained first:
[0026] FPGA (Field-Programmable Gate Array): field programmable gate array;
[0027] ARM (Acorn RISC Machine): Microprocessor;
[0028] DDS (Direct Digital Synthesizer): direct digital frequency synthesizer;
[0029] fifo(First Input First Output): first in first out queue;
[0030] Mcbsp (Multichannel Buffered Serial Port): Multichannel buffered serial port;
[0031] SPI (Serial Peripheral Interface): serial peripheral interface;
[0032] ROM (Read Only Memory): read-only memory;
[0033] NCO (numerically controlled oscillator): digitally controlled oscillator;
[0034] figure 1 It is a principle block diagram of a portable three-dimensional acoustic logging instrument on-site maintenance device of the present invention.
[0035] In this example, if figure 1 As shown, a portable three-dimensional acoustic logging instrument field main...
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The invention discloses a portable on-site maintenance device for a three-dimensional acoustic logging tool. After the device is powered on, the ARM transmits the acquisition command to the FPGA through the SPI0 interface. The logging tool provides the 3D acoustic signal, and at the same time, the FPGA forwards the acquisition command to the 3D acoustic logging tool through the Mcbsp interface, and the 3D acoustic logging tool starts to collect the acoustic signal after receiving the acquisition command; The Mcbsp interface uploads to the FPGA at high speed, and the FPGA forwards the collected data to the ARM through the SPI1 interface after receiving the collected data; the ARM compares the collected data with the historical logging data, and if there is a difference in the comparison, it sends the instrument through the SPI0 interface The initialization command initializes the 3D acoustic logging tool to realize on-site maintenance.
Description
technical field [0001] The invention belongs to the technical field of logging equipment maintenance, and more specifically relates to a portable on-site maintenance device for a three-dimensional acoustic logging instrument. Background technique [0002] In the past ten years, due to the development of electronic information technology and the stimulation of oil demand, logging technology has made great progress. Among them, the acoustic logging technology is based on rock elasticity and borehole acoustics, and provides an important basis for the analysis of porosity and lithology in the formation by obtaining information such as the amplitude, frequency and time difference of the compressional and shear waves in the formation. The 3D acoustic logging technology is a new generation of logging technology gradually developed on the basis of the orthogonal dipole acoustic logging technology. The 3D acoustic logging technology uses all current acoustic measurement modes (single...
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IPC IPC(8): G06F9/4401G06F13/42E21B47/14
CPCE21B47/14G06F9/4401G06F13/4282
Inventor 张伟师奕兵李焱骏陈垒石晓伟邓伟付浩瀚
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA