106 results about "QuakeFinder" patented technology

A self-contained data acquisition unit is provided for acquiring seismic data. The unit has a microprocessor and an antenna adapted to receive an electromagnetic signal. A decoder is connected with the microprocessor and adapted to convert received electromagnetic signals to dual-tone multiple-frequency (“DTMF”) digits. A geophone interface is provided with a geophone for collecting acoustic data incident on the geophone. A memory is connected with the geophone interface for storing a representation of the collected acoustic data and for storing a representation of a reference electromagnetic signal to be used in synchronizing acoustic data collected by other data acquisition units. A battery power source is connected with the microprocessor.

Arrangement for use for seismic surveys of geological formations in a seabed, where a plurality of such arrangements, which are provided with sensor units 26, are placed on the seabed for collecting pressure waves and shear waves reflected from the geological formations. There exist arrangements for transferring seismic data to a surface receiver placed on a vessel, an offshore installation, or an onshore installation. Each sensor unit 26 is held by a carrier 10 and is connected to a cylindrically skirt-shaped structure 19 adapted to be led down into the seabed, and each sensor unit 26 comprises at least one geophone. The carrier 10 comprises a holder 12 for the cylindrically skirt-shaped structure 19, which structure 19 shall penetrate down into the seabed, as this holder 12 is adapted to be moved between a lower position and an upper position, to be able to be mechanically released from the skirt-shaped structure 19.

A system for the transmission of data by seismic wave, the system having at least one transmitting unit, that at least one transmitting unit comprising a first processing unit encoding a first signal, the first processing unit being coupled to a digital to analog converter, an amplifier amplifying the first signal, and a seismic pressure wave inducer transmitting the first signal to a geological feature; and at least one receiving unit, the receiving unit comprising at least one receiver coupled to the geological feature for receiving the first signal, and an analog to digital converter whereby the first signal is transferred from the geophone and is conveyed to a second processing unit, the second processing unit being configured to identify and decode the first signal.

The invention discloses an omnidirectional vector seismic data processing method and apparatus, a computer readable storage medium and a device, applied to an omnidirectional vector geophone. Wherein the method comprises: collecting omnidirectional vector seismic data of the omnidirectional vector geophone, and performing a pre-processing operation on the omnidirectional vector seismic data; performing pressure and shear waves separation operation on the omnidirectional vector seismic data after the data is subject to the pre-processing operation, to obtain pressure wave data and shear wave data; sequentially performing space vector calculation, a wave field recovery operation and an imaging operation on the pressure wave data and the shear wave data, and then performing modeling to obtain a pressure wave velocity model and a shear wave velocity model. The invention solves the problem of the existing seismic exploration technology that cannot measure and process divergence data and curl data of seismic wave field, so as to improve construction, lithology, fluid exploration accuracy and reliability and promote seismic exploration to be developed from structural exploration to lithology exploration and fluid exploration.

The transmission system combines a self-contained, wireless seismic acquisition unit and a wireless, line of site, communications unit to form a plurality of individual short-range transmission networks and also a mid-range, line of sight transmission network. Each seismic unit has a power source, a short-range transmitter / receiver disposed within a casing and a geophone disposed within the casing. Each wireless communications unit is formed of an elongated support structure on which is mounted an independent power source, mid-range radio transmitter / receiver; and a short-range transmitter / receiver configured to wirelessly communicate with the short-range transmitter / receiver of the acquisition unit. Preferably, when deployed, the acquisition unit is buried under the surface of the ground, while the wireless communications unit is positioned in the near vicinity of the buried unit so as to vertically protrude above the ground. The acquisition unit and the wireless communications unit communicate by short-range transmissions, while the wireless communications unit communicates with other seismic acquisition systems using mid-range radio transmission. When multiple seismic acquisition unit / wireless communications units are deployed in an array, the system can pass collected seismic and quality control data in relay fashion back to a control station and / or pass timing and control signals out to the array.

A method for identifying and suppressing water column reverberations (“multiple reflections”) in two-component ocean bottom seismic data is disclosed. The method involves processing the hydrophone (P) data and the geophone (Z) data separately to produce two stacked images of the subsurface (21). Analyzing the stacked P-image and the stacked Z-image together can be used to identify multiple reflections (22). Analyzing the stacked / ′-image and the stacked Z-image together with an image of the subsurface created from hydrophone and geophone data combined in the usual way (PZ-image) (20) can be used to identify residual multiples in the PZ image (23). The stacked P and Z images can be combined using an existing PZ combination technique to suppress multiples (24). The efficiency of the PZ combination technique at suppressing multiples is increased because of the higher signal-to-noise ratio of stacked data.

The invention relates to a seismic detector for a pull-type crawler, which comprises a shell and a grounding end connected with the front end of the shell and arranged outside a rubber belt track; the shell is arranged at the inside of the rubber belt track, and the grounding end and the shell are connected to be fixed on the rubber belt track; a detector core is rigidly fixed in the inner cavity of the shell and is closed by a thread end cover arranged at the tail end of the detector core; the bottom end of the detector core is provided with a signal lead; during seismic measuring, as the detector core body and the shell package are rigidly fixed and the shell of the detector and the ground form an absolute mass body, the detector can better measure the particle vibration of the earth surface. The seismic detector is suitable for the rigid packaging requirements between the shell and all vibration-type and other mechanical sensor core bodies. A contact, which is coupled with the ground, of the detector with the minitype structure is connected onto the mobile rubber belt track by threads, so the seismic detector is stable in work, reliable, efficient, suitable for various geological surfaces to carry out geophysical prospecting, low in manufacturing cost, simple and conveniently connected with a lower computer.

The invention relates to a system for automatically detecting and sorting spring pieces for a seismic detector. The system comprises a controller system, a measuring mechanism and a sorting mechanism, and is characterized in that: the measuring mechanism and the sorting mechanism synchronously work under control of the control system, namely when the measuring mechanism detects the current spring piece and calculates an elastic coefficient, a supporting force and a sorting coordinate of the spring piece, the sorting mechanism takes the last detected spring piece from a piece carrying plate, and hangs the taken spring piece on the corresponding hanging pin on a sorting board according to a coordinate value of the spring piece on the sorting board, which is sent by a controller. In a measuring process, when the measured spring piece is taken away, an operator only places the spring piece to be detected on the piece carrying plate and turns on a measuring button, so that the following detecting and sorting processes are not intervened by the operator. A plurality of machines can be operated by one person and the system has the advantages of high precision, high speed, high efficiency, simpleness in operation and low labor intensity.