Method and apparatus for testing geophones

Details Method and apparatus for testing geophones Method and apparatus for testing geophones

1990-11-19

1992-05-12

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Testing, monitoring, or calibrating

73 1DV, G01V 1300

Patent

active

051133750

ABSTRACT:
A LCD display is driven by certain elements to indicate the responses of a geophone to various tests as a waveform. Waveforms are displayed for an impulse tests, wherein a current pulse is applied to the geophone and the response is displayed, and for a tap test, wherein the top of a geophone is tapped and the first break of the resulting displayed waveform indicates the polarity of the geophone connections. Response to a resistance test is provided by a level indicator. The waveform on the display may be examined with reference to a comparitor indicative of a proper response, and the operational or disfunctional condition of the geophone thereby determined.

REFERENCES:
patent: 4043175 (1977-08-01), Fredriksson et al.
patent: 4127848 (1978-11-01), Shenks

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