一种伪随机信号混合编码及其在油气压裂智能实时监测系统中的应用

doi:10.11720/wtyht.2020.2288

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Abstract

This paper describes a realization method and hardware dynamic loading process of pseudorandom signal mixed coding based on x×a ⁿ and y×b ⁿ sequences and its application to gas fracture detection in Weiyuan of Sichuan Province. By using the mixed coding method of pseudorandom signals based on x×a ⁿ and y×b ⁿ sequences, researchers can design pseudorandom signals that satisfy combination of pseudorandom encoding rules, encode waveforms and generate code streams automatically. The dynamic loading technology based on this coding can load large, long and complex composite pseudorandom signals, thus providing a convenient and universal technical method for the application of multiple pseudorandom signals.

Key words： pseudorandom signal hybrid coding dynamic loading oil and gas fracturing

Received: 24 July 2018 Published: 03 March 2020

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	Yong-Bing WANG
	Ji-Shan HE

Cite this article:

Yong-Bing WANG,Ji-Shan HE. A hybrid coding and its application to the oil and gas fracturing intelligent real time monitoring system based on pseudorandom signal[J]. Geophysical and Geochemical Exploration, 2020, 44(1): 74-80.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.2288 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I1/74

Spectrum of pseudo-random signal(seven-frequency wave)

The forming process diagram of combined waveform by 1∶2 ratio

The forming process diagram of combined waveform by 2∶1 ratio

The program frame chart

The internal logical block diagram of CPLD

Hardware physical diagram

The internal block diagram of MCU

The overall hardware block diagram

DGN-2 Multifunctional Signal Controller

The system block diagram

The pseudo-random signal waveform figure of nineteen-frequency wave based on 1×2ⁿ+1.5×2ⁿ

The pseudo-random signal spectrum of nineteen-frequency wave based on 1×2ⁿ+1.5×2ⁿ

Process rendering

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