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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摘要

介绍了基于x×a ⁿ与y×b ⁿ序列的伪随机信号混合编码的实现方法、硬件动态加载过程,及其在四川威远某页岩气压裂监测工程中的应用。应用基于x×a ⁿ与y×b ⁿ序列的伪随机信号混合编码方法,可以设计出满足伪随机编码规则的组合形式的伪随机信号,并对波形进行编码,自动生成码流。基于这种编码的动态装载技术可以对大而长和较复杂的组合伪随机信号进行加载,为多种伪随机信号应用提供了一种便捷、通用的技术方法手段。

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	王永兵
	何继善

关键词 ：伪随机信号, 混合编码, 动态装载, 油气压裂

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

收稿日期: 2018-07-24 出版日期: 2020-03-03

P631

基金资助:国家自然科学基金项目(41227803)

作者简介: 王永兵(1983-),男,2011年毕业于济南大学,获硕士学位,工程师,从事物探设备的研发工作。Email: netwyb@yeah.net

引用本文:

王永兵, 何继善. 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[J]. 物探与化探, 2020, 44(1): 74-80.
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. Geophysical and Geochemical Exploration, 2020, 44(1): 74-80.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.2288 或 https://www.wutanyuhuatan.com/CN/Y2020/V44/I1/74

Fig.1 伪随机信号频谱图(7频波)

Fig.2 按照1∶2配比时组合波形形成过程

Fig.3 按照2∶1配比时组合波形形成过程

Fig.4 程序流程

Fig.5 CPLD内部逻辑框图

Fig.6 硬件实物图

Fig.7 MCU内部框图

Fig.8 总体硬件框图

Fig.9 DGN-2多功能信号控制器

Fig.10 系统框图

Fig.11 基于1×2ⁿ+1.5×2ⁿ的19频波伪随机信号波形

Fig.12 基于1×2ⁿ+1.5×2ⁿ的19频波伪随机信号频谱

Fig.13 过程效果图

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