초록 ▼

The seismic method comprises in one preferred embodiment, towing a long, flexible member over the earth\s surface, the member having liquid-filled geophones mounted thereon or coupled thereto and suitably spaced therealong, and a seismic cable for receiving the individual outputs of the geophones. E

The seismic method comprises in one preferred embodiment, towing a long, flexible member over the earth\s surface, the member having liquid-filled geophones mounted thereon or coupled thereto and suitably spaced therealong, and a seismic cable for receiving the individual outputs of the geophones. Each liquid-filled geophone provides an output electric signal having a polarity corresponding to the direction of the earth\s motion. In another embodiment of the method of this invention, the geophones are positioned on the earth\s surface in a predetermined pattern; their output signals are transmitted to a utilization device; then the geophones are moved to another location, and the detection process is repeated. In a simplified embodiment, the geophone comprises a hollow cylindrical casing defining a chamber therein. A high-density liquid substantially fills the chamber. The chamber has a flexible bottom wall which constitutes a force or pressure transducer. In a preferred embodiment of the geophone, the chamber has in addition to the flexible bottom wall, a flexible top wall which also constitutes a transducer. The geophone provides at its output terminals an electric signal which suitably combines the output signals of the pair of transducers.

대표청구항 ▼

A seismic detector comprising: a housing including an internal chamber; a fluid mass in the chamber; and means for generating a pair of transducer signals in response to excitation of the fluid mass by seismic signals so that the vertical components of the seismic signals may be identified and proce

A seismic detector comprising: a housing including an internal chamber; a fluid mass in the chamber; and means for generating a pair of transducer signals in response to excitation of the fluid mass by seismic signals so that the vertical components of the seismic signals may be identified and processed separate from the horizontal components regardless of the orientation of the housing to the gravitational vertical.