地震学报2019，Vol.41Issue(1)：92-99,8.
地震数据采集器非线性指标测试方法及其影响分析
Test methods for nonlinear parameters of seismic data recorders and their effect analyses
摘要
Abstract
Total harmonic distortion （THD） and intermodulation distortion （IMD） characteris-tics are two important nonlinear parameters of seismic data recorders. Input signal mode and peak value of sine-wave can affect the test results of these two characteristics. In order to deter-mine these effects, the basic principles on THD and IMD were introduced in this paper, and then test methods, data processing methods and effect analyses on THD and IMD were fully presented. Finally, some different kinds of sine-waves were input into the seismic data recorder to test THD and IMD. The test results show that the two signals with the same peak value but different input-mode have great impact on THD, and those with the same frequency but different peak value of sine-wave have great impact on IMD. However, signal frequency variation has no impact on THD and IMD. The research in this paper is of great value for quality test of seismic data recorder, which can be applied to test THD and IMD of seismic data recorders.关键词
地震数据采集器/ 质量检测/ 非线性特性/ 总谐波失真度/ 互调失真度/Key words
seismic data recorder/ quality inspection/ nonlinearity/ total harmonic distortion （THD）/ intermodulation distortion （IMD）/分类
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李彩华,滕云田,李小军,汤一翔,王喆,胡星星,张旸..地震数据采集器非线性指标测试方法及其影响分析[J].地震学报,2019,41(1):92-99,8.基金项目
中国地震局地球物理研究所基本科研业务费专项（DQJB15B03，DQJB18B23）资助 （）
