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OMNIPHONE是一种带有微处理器的三分量智能型检波器,它具有极化滤波的能力.笔者对该检波器进行了全面的分析与介绍,指出了OMNIPHONE检波器的成功之处.未经改造的OMNIPHONE检波器存在以下问题:(1)水平两个分量间串扰严重,串扰值大于0dB;(2)水平两个分量对理想圆形面波的压制能力不够,压制比为-10dB~10dB.经过对OMNIPHONE检波器软硬件的综合分析,发现存在以下缺陷:(1)随着分析信号频率的升高(10Hz~250Hz),U、V、W三个分量间由于采样时延引起的相移逐步加大;(2)软件编制过程中,坐标旋转(从加尔彼林坐标变换到直角坐标)部分存在错误.针对以上缺陷,改正了软件编制过程中存在的错误,并减小了三分量间的采样时延.改造后测试结果表明:OMNIPHONE三分量间串扰显著减小,对理想圆形面波的压制能力增强,三个分量的频率响应曲线更加平坦.
OMNIPHONE is a three-component smart detector with a microprocessor that has the ability to polarize filtering. The author conducted a comprehensive analysis and introduction of the geophone and pointed out the success of the OMNIPHONE geophone. Unmodified OMNIPHONE geophones have the following problems: (1) crosstalk between two components is very serious and the crosstalk value is greater than 0 dB; (2) the horizontal two components are not enough to suppress perfect circular surface waves, and the suppression ratio is -10 dB ~ 10dB. After a comprehensive analysis of OMNIPHONE geophone hardware and software, we found the following shortcomings: (1) With the increase of the frequency of the analysis signal (10Hz ~ 250Hz), the phase shift caused by the sampling delay between the three components of U, V and W Gradually increase; (2) software compilation process, coordinate rotation (from Cartelin coordinates Cartesian coordinates) part of the error. In view of the above defects, the existing errors in the process of software preparation are corrected, and the sampling delay between the three components is reduced. The test results show that: OMNIPHONE three-component crosstalk was significantly reduced, the suppression of the ideal circular surface wave enhancement, the three components of the frequency response curve more flat.