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本文首先研究了静电示波仪检流计的结构、工作原理以及国内常用的几种静电示波仪的阻尼、频率特性和输入阻抗,并进行了比较。然后以DFS-V数字地震仪为例,研究了数字地震仪与静电示波仪接口电路的传输特性和输出阻抗。推导出接口电路传输函数的一系列关系式和理想情况下的简化关系式,并给出数字表达式。最后提出了在进行数字地震仪与静电示波仪配套或更换时应考虑的问题。
In this paper, the structure, working principle and the damping, frequency characteristics and input impedance of several kinds of static oscillographs are studied and compared. Then, taking DFS-V digital seismograph as an example, the transmission characteristics and output impedance of interface circuit between digital seismograph and electrostatic oscilloscope are studied. A series of relations of the transfer function of the interface circuit and the simplified relations under the ideal situation are deduced, and the numerical expressions are given. Finally, the problems that should be considered in the matching or replacement of digital seismograph and electrostatic oscillograph are put forward.