| 基于虚拟仪器技术的声-电效应观测系统及其在冻土模型研究中的应用 |
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| 引用本文： | 袁蕾,刘争平,张欣,刘志辉.基于虚拟仪器技术的声-电效应观测系统及其在冻土模型研究中的应用[J].地球物理学进展,2009,24(3):1142-1148. |
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| 作者姓名： | 袁蕾 刘争平 张欣 刘志辉 |
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| 作者单位： | 西南交通大学土木工程学院,成都,610031 |
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| 基金项目： | 国家自然基金，地球探测与信息技术教育部重点实验室 |
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| 摘 要： | 详细介绍了介质的声-电转换效应的产生机理、利用虚拟仪器技术来搭建声-电观测系统的原理、软硬件系统和实现方法.搭建的观测系统可以实现高分辨率、高采样率和多次叠加的数据采集,极大的增强了采集的微弱声-电信号的信噪比.该系统还具有混合信号同步采集功能,可以方便的通过改变接收传感器进行声-声和声-电两种信号的基本同步测量,为声-电信号的观测和分析提供重要的参考信息.文章以观测干砂摸型的声-电响应,和冻土模型的声-声和声-电响应两个具体实例验证了该观测系统的可行性和优越性.
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| 关 键 词： | 虚拟仪器 声-电效应 冻土模型 |
| 收稿时间： | 2008-7-2 |
| 修稿时间： | 2008-12-8 |
The acquisition system of acoustic-electric conversions based on virtual instruments and its application to the studies of the permafrost model |
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| YUAN Lei,LIU Zheng-ping,ZHANG Xin,LIU Zhi-hui.The acquisition system of acoustic-electric conversions based on virtual instruments and its application to the studies of the permafrost model[J].Progress in Geophysics,2009,24(3):1142-1148. |
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| Authors: | YUAN Lei LIU Zheng-ping ZHANG Xin LIU Zhi-hui |
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| Institution: | (SchoolofCivilEngineering,SouthwestJiaotongUniversity,Chengdu610031,China) |
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| Abstract: | This paper introduces the mechanism of acoustic-electric conversions, measure principles, softwear and hardwear sub-systems, and realization method of the acoustic-electric acquisition system based on virtual instrument technology in detail. The system can carry out data acquisition with high resolution, high sampling rate and multiple stacks automatically, and all of these functions greatly enhance the signal-to-noise ratio of the detected acoustic-electric signal at a level from several to tens microvolts. The synchronous acquisition functions of the system for the signals from multiple sources can achieve the measurements of the acoustic-acoustic and acoustic-electric signals approximately at the same time simply by changing the transducers, and the former is the important reference information for the analysis of the acoustic-electrtic signal. With two model measurement cases,acoustic-acoustic responses in a dry sandstone model, and acoustic-acoustic and acoustic-electric responses in a permafrost model, the feasibility and the superiority of the system are verified. |
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| Keywords: | LabVIEW |
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