涡流检波器串动态特性测试夹具的改进与试验

英文篇名：The Investigation and Improvement of a Supplementary Fixture of a Device for Measuring the Dynamic Characteristics of a Vortex-geophone Cluster
中文刊名：机械科学与技术
英文刊名：Mechanical Science and Technology
作者：任兴民 ; 秦卫阳 ; 杨文献 ; 袁振宇
英文作者：REN Xing-min ; QIN Wei-yang ; YANG Wen-xian ; YUAN Zhen-yu (Northwestern Polytechnical University ; Xi'an 710072)
中文关键词：涡流检波器 ; 动态特性 ; 结构设计
英文关键词：Vortex-geophone ; Dynamic characteristics ; Structure design
出版日期：2000-12-30
机构：西北工业大学振动工程研究所!西安710072,西北工业大学振动工程研究所!西安710072,西北工业大学振动工程研究所!西安710072,西北工业大学振动工程研究所!西安710072
年：2000
期：S1
出版单位：机械科学与技术

摘要

地震勘探多采用多通道数据采集。为了得到有效的地质数据，不同地震通道的接收特性（包括有效带宽、灵敏度、信噪比等）必须一致，这对不同通道所连接的检波器特性的一致性提出了很高的要求。为了确保一致性及测试的可靠性和准确性，对检波器的各项性能参数进行定期检测是十分必要的。对涡流检波器串动态特性测试设备的夹具进行了动力学分析与测试，发现原设备的动态特性不能满足测试要求，因此在分析计算的基础上对原设备夹具进行了改进设计。试验结果表明，改进后的设备性能有较大改善。
In seismic technique, there are several channels for data acquisition. Each channel is connected with a vortex-geophone cluster. It is important to ensure every vortex-geophone be of identical characteristics (bandwidth, sensitivity, SNR etc. ). In this paper, dynamic analysis and test are conducted on a measuring device of seismic geophone behavior with a supplementary fixture. The results show that its dynamic properties can not meet the need of measure precision. The modals of the fixture are key problem in the measuring device. In the measuring frequency bandwidth, there must not be any dynamic modal or resonant frequency. Based on the FEM analysis and dynamic test, the fixture is redesigned. The main improvements of the new fixture are to shift the resonant frequency out of the measuring bandwidth and to add a ring shaped spring to the fixture. The tested results of the new system show that its performance is distinctly improved.

引文

[1]彭名昌.涡流检波器动态参数识别技术[D].西安交通大学, 1991.5
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[3]赵德云.人工地震勘探检波器参数测试原理与方法[D].清华大学,1997.5