| 摘要 |
PURPOSE: A geophone is provided to improve the supporting force of a product to the surface of the earth by adopting a dummy plate type structure. CONSTITUTION: A geophone includes a weight body(10) and a sensor unit(20). The weight body is installed on the surface of the earth in order to inspect the ground of the earth. A female screw part is formed on one side which faces the surface of the earth. A male screw part is formed at another side. The sensor unit includes a sensor part in order to inspect the ground of the earth and is combined with the female screw part or the male screw part. A spike is combined with remaining screw part in order to firmly fix the weight body to the surface of the earth.
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