检波器运动方程的解及其意义
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摘要
由于检波器运动方程未能解出，使得检波器和地面的耦合关系一直未得到解释．现用拉氏变换将其解求出，发现检波器输出电位信号不仅包括地下反射波的振动，也包含检波器自然频率的振动．在作信息处理时，必须首先消去检波器自然频率的振动．检波器有选频作用，地震波的频率越接近检波器的自然频率，输出信号越强．提高检波器灵敏度、减小阻尼和增大检波器自然频率可以增强输出信号．野外接收地震信号要用可变自然频率的检波器或用多个不同自然频率的检波器组合．
Because the solution to geophone motion equation has not been found, the coupling relation between the geophone and the ground has not been explained. We find its solution by using LapLace transform. From this we find the output potential signal of the geophone includes not only the vibration of underground reflection, but also the vibration whose frequency is the natural frequency of geophone. Therefore, we must first remove the vibration at natural frequency of geophone when underging information processing. Geophone has selecting frequency function, the stronger the output signal, the closer the frequency of seismic wave to the natural frequency of geophone. The output signal can be enhanced by improving the sensitivity of geophone, reducing damping and increasing the natural frequency of geophone. Receiving seismic signal has to use geophone with variable natural frequency or the combination of several geophones with different natural frequencies in the field.
Because the solution to geophone motion equation has not been found, the coupling relation between the geophone and the ground has not been explained. We find its solution by using LapLace transform. From this we find the output potential signal of the geophone includes not only the vibration of underground reflection, but also the vibration whose frequency is the natural frequency of geophone. Therefore, we must first remove the vibration at natural frequency of geophone when underging information processing. Geophone has selecting frequency function, the stronger the output signal, the closer the frequency of seismic wave to the natural frequency of geophone. The output signal can be enhanced by improving the sensitivity of geophone, reducing damping and increasing the natural frequency of geophone. Receiving seismic signal has to use geophone with variable natural frequency or the combination of several geophones with different natural frequencies in the field.
引文
1徐中英．地震子波剖析．石油地球物理勘探，1982，17（3）：12刘仲一．地震勘探仪器原理．东营：华东石油学院出版社，1981．593吴顺和，王云专，吴邕．地震波的正演和对地震波的新认识．大庆石油学院学报，1998，22（2），18
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