Abstract:
A seismic data acquisition system includes a connector housing (300) and a mating electrical circuitry module (200). A single interface couples electrical circuitry (140) housed in he electrical circuitry module (200) to one or more signal data carriers (43) that are consolidated at a single location in the connector housing (300). Preferably, the connector housing (300). Preferably, the connector housing (300) and electrical circuitry module (200) each have a substantially contaminant-free interior regardless of whether these two parts are mated. An alternate connector housing has two plug casings, each of which are provided with a plug. A complementary alternate electrical circuitry module includes two receptacles complementary alternate electrical circuitry module includes two receptacles complementary to the plugs and an interior space for holding the electrical circuitry. A locking pin disposed within the plug casing selectively engages the electrical circuitry module (200). A method for establishing communication between the electrical circuitry (14) and the carriers (43) and external devices includes providing a single communication interface between the carrier and the electrical circuitry.
Abstract:
A three-axis seismic vibrator (10) is provide which imparts compressional and shear wear seismic vibrations, either sequentially or simultaneously, into the Earth's surface. The seismic vibrator includes an earth-contacting baseplate (12) which transmits vibrational energy into the Earth's surface; a support structure; a vibrator assembly (20) pivotally supported at one end by the support structure; and servo-hydraulic control circuits (21) which activate reciprocal vibration along the vibratory axis of the vibrator assembly and sustained oscillatory vibration of the vibrator assembly. The vibrations thus generated are transferred to the baseplate and injected into the Earth's surface. These vibrations and their reflections can then be recorded and analyzed to determine the mineral content of the Earth's surface in the immediate area.
Abstract:
A motion sensing transducer is disclosed that includes a case having an inner surface, a first cap that closes the case at a first end and a second cap that closes the case at a second end. The case inner surface, first cap and second cap define a space within the case. The apparatus further includes at least one inner plate member separating the space into at a first compartment and a second compartment within the case, a coil-magnet assembly that produces a signal when subjected to motion, the coil-magnet assembly disposed immediately within the case and in the first compartment, and an electronic circuit disposed within the second compartment that modifies the signal.
Abstract:
A seismic source signal generator having feed-forward control having pressure, curre and/or valve position sensors that detect system component parameters. Initial and operating parameters are processed during source operation to remove, partially or wholly, harmonic distortions from the seismic source signal.
Abstract:
The present invention, in certain embodiments, is a method, system and apparatus for information gathering, for example seismic data acquisition operations or utility services monitoring for homes, businesses and municipalities, using a wireless network with a virtual enabling data communication and storage over multiple environment, hardware systems and time frames. This WAN platform is capable of handling all communications for a seismic field crew or other information gathering organization. The invention provides near real-time dissemination of data across a mobile network to a destination system.
Abstract:
A GPS-based underwater cable positioning system for use in determining the shape and position of hydrophone streamers towed underwater behind survey vessels involved in marine seismic prospecting. The system includes a plurality of surface units towed behind the vessel. Each surface unit includes a GPS receiver to receive radio frequency GPS signals and to determine its positions. Each surface unit also has an acoustic transmitter to transmit an acoustic message signal representing its position and an optional time stamp into the water. Acoustic receiver units, attached spaced apart locations along one or more streamer cables, each include an acoustic receiver to receive the acoustic message signals from the surface units and to determine its position from the message signals. To augment the message signals from the surface units at locations distant from the surface units, acoustic transceiver units may be used. The acoustic transceiver units are attached to the streamer cables at ranges between the surface units and distant acoustic receiver units. The acoustic transceiver units each include an acoustic receiver that performs as the receivers in the acoustic receiver units and an acoustic transmitter to transmit acoustic message signals representing its position and an optional time stamp into the water to be received by the acoustic receiver units. In this way, the positions and shapes of towed streamer cables can be determined.
Abstract:
The present invention provides an adaptive filtering method for substantially eliminating ground roll noise encountered during seismic data acquisition. An apparatus for acquiring seismic data is provided that includes an adaptive filtering circuit coupled to a multi-axis sensor device.
Abstract:
A digital optical switch apparatus and method for manufacture. The apparatus includes a mirror assembly (112) coupled to a top cap (110) and to a bottom cap (114).
Abstract:
The present invention provides a method and apparatus of acquiring and processing seismic data. One or more controllers (200) are each coupled to seismic sensors (110a-d) to form a line of data acquisition units (106a-d). A main controller (102) is coupled to a crossover line unit (104) and to a power supply. Power and data control is distributed among the main controller (102), the crossover line controller (104) and each of the plurality of data acquition units (106a-d).
Abstract:
A seismic data acquisition system includes a connector housing and a mating electrical circuitry module. A single interface couples electrical circuitry housed in he electrical circuitry module to one or more signal data carriers that are consolidated at a single location in the connector housing. Preferably, the connector housing. Preferably, the connector housing and electrical circuitry module each have a substantially contaminant-free interior regardless of whether these two parts are mated. An alternate connector housing has two plug casings, each of which are provided with a plug. A complementary alternate electrical circuitry module includes two receptacles complementary alternate electrical circuitry module includes two receptacles complementary to the plugs and an interior space for holding the electrical circuitry. A locking pin disposed within the plug casing selectively engages the electrical circuitry and the carriers and external devices includes providing a single communication interface between the carrier and the electrical circuitry.