| 记录大位移的宽频带强震仪 |
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| 引用本文： | 王广福,邵安民,秦晔.记录大位移的宽频带强震仪[J].地球物理学报,1982,25(3):234-242. |
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| 作者姓名： | 王广福 邵安民 秦晔 |
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| 作者单位： | 中国科学院地球物理研究所 |
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| 摘 要： | 作者把H.Benioff提出的电磁式地震计用并联电容增长固有周期的方法用到强震仪的设计中,并提出用电流计并联电阻-电容增长电流计固有周期和对整个仪器频率特性进行校正的设计方法,获得了将近三个十倍频程的带宽。标定实验和野外观测结果与理论计算相符。 该仪器可用于爆炸地震效应观测和工程结构振动测量。最大可记录位移1米,频带宽度约为0.2赫到200赫。
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| 关 键 词： | 电磁式地震计 强震仪 电流计 并联电容 宽频带 大位移 并联电阻 线圈并联 机电相似 过渡段 |
| 收稿时间： | 1980-09-02 |
BROAD-BAND STRONG VIBROGRAPH FOR RECORDING LARGE DISPLACEMENTS |
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| WANG GUANG-PU,SHAO AN-MIN,QIN YE.BROAD-BAND STRONG VIBROGRAPH FOR RECORDING LARGE DISPLACEMENTS[J].Chinese Journal of Geophysics,1982,25(3):234-242. |
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| Authors: | WANG GUANG-PU SHAO AN-MIN QIN YE |
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| Institution: | Institute of Geophysics, Academia Sinica |
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| Abstract: | For increasing the period of the vibrograph a capacitor is connected in parallel with its sensor coil as suggested by H. Benioff for increasing the natural period of an electromagnetic seismometer. Further, a capasitor and a resistor in series are paralleled with the recording galvanometer for increasing its period and improving the frequency characteristics of the vibrometer-galvanometer combination, so that a bandwidth of 3 decades can be obtained. Results of numerical computation agree with actual calibration tests and field observations.The vibrograph can be used for observing seismic effects of explosions and measuring vibrations in engineering and construction work. The largest displacement that can be recorded is one meter. The bandwidth is from about 0.2 Hz to 200 Hz. |
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