Arrangements of receiving elements, e.g. geophone pattern (G01V1/20)

G   Physics(394805)
G01   easuring; testing(233827)
G01V1/20                     Arrangements of receiving elements, e.g. geophone pattern(34)

Depth-activated sensor switch and method of switching it off // 2645427
FIELD: physics.SUBSTANCE: present invention relates to switch for marine seismic sensor. Switch includes a bellows having a closed end, a side portion and open end, in which the side portion connects the closed end to the open end, the closed end includes an electrically conductive surface and the side portion acts as a spring; a base plug that includes a first input and a first output terminal on the first side and a second input and a second output terminal on the opposite side; and a plug located at the open end of the bellows and configured to form a chamber within which a second input contact and a second output terminal are provided. Conductive surface closes the second input contact and the second output contact shortly when the pressure, greater than specified pressure (P), acts on electrically conductive surface.EFFECT: technical result is to improve the information content of the received data.23 cl, 13 dwg

Data acquisition device equipped with means of detecting tripout of a set of at least one analogue seismic sensor // 2643208
FIELD: geophysics.SUBSTANCE: invention relates to geophysics and can be used during seismic surveys. Data acquisition device is provided comprising a pair of input terminals configured to be connected to a set of at least one analog seismic sensor generating a useful seismic signal, and a tripout detection means to detect partial or complete tripout of the set of at least one analog seismic sensor. Tripout detection means comprises a means for introducing low current into the set of at least one analog seismic sensor for generating a bias signal partially depending upon the electrical resistance of the set of at least one analog seismic sensor and being added to the useful seismic signal, wherein the bias signal occupies only part of the operating range of the data acquisition device. Tripout detection means also comprises an analog-to-digital converter and a filtering means for converting and filtering the voltage measured on the pair of input terminals in order to obtain a measured value of the bias signal and either a means for analyzing the time variation of the measured value of the bias signal and activating the alarm signal when the predetermined condition is met, or a means for transmitting the measured value of the bias signal to a remote device configured able to analyze the time variation of the measured value of the bias signal and to turn on the alarm when the preset condition is met.EFFECT: higher accuracy of obtained data is provided.9 cl, 6 dwg

Delivery and recovery device, method and application // 2628418
FIELD: transportation.SUBSTANCE: invention application describes the mechanisms and methods by which freely movable remotely operated vehicles (ROVs) can reliably capture and take on board easily controlled seismic sensors (cargo) while they are in the process of moving, using a underwater ship in the water depth. The ROV cargo can be replenished without the need to return the ROV to the underwater ship for additional cargo and without the need for heavy lifting and recovery equipment. Also, a reverse process for returning cargo from ROV to the underwater ship vessel is disclosed.EFFECT: installation, control and removal of cargo from unstable environment are performed more efficiently and reliably.16 cl, 26 dwg

ethod for mounting a seismic sonde in the field // 2607848
FIELD: safety.SUBSTANCE: invention relates to security alarm systems, capable of reliable controlling movement of any objects in the security zone, namely, to auxiliary equipment used during unfolding and mounting a seismic sonde in the field, mounting accuracy of which determines the accuracy of determining coordinates of location of an intruder. Such systems are used for controlling extended objects, for example, the state boundary. Disclosed is a method for mounting a seismic sonde in the field, comprising mounting at least three geophone-seismic vibration sensors, located relative to each other on strictly specified linear and/or angular coordinates and connected with the seismic sonde, equipped with a seismic data processing unit. Novelty is that the geophones are being mounted in points in the field, determined by a stencil azimuth-oriented in the global coordinate system.EFFECT: technical result is higher accuracy of the obtained data.3 cl, 5 dwg

ethod of estimating sound speed in water in acoustic network nodes // 2585300
FIELD: acoustics.SUBSTANCE: method for estimating an underwater acoustic sound velocity in a network of acoustic nodes arranged along towed acoustic linear antennae and in which a plurality of acoustic signals are transmitted between nodes, method comprising steps of: obtaining two predetermined distances each separating a couple of nodes ((A,B), (B,C)) placed along a same first acoustic linear antenna (31); for each couple of first and second nodes ((A,B), (B,C)), obtaining a first propagation duration of an acoustic signal transmitted between said first node and third node (D) placed along a second acoustic linear antenna (32) and a second propagation duration of an acoustic signal transmitted between said second node and said third node (D); and estimating said underwater acoustic sound velocity, as a function of said two predetermined distances and said first and second propagation durations obtained for each couple of nodes.EFFECT: estimation of sound velocity in water in a network of acoustic nodes arranged along towed linear acoustic antennae.12 cl, 7 dwg

odule for processing geophysical data, connector and subunit // 2580874
FIELD: geophysics.SUBSTANCE: invention relates to geophysics and may be used for collection of geophysical data. Disclosed is a module (1) for processing of geophysical data coming from at least one geophysical sensor. Module comprises an electronic board (3) designed for processing of geophysical data obtained from at least one geophysical sensor, two cable section (4), each of which has on one end of the connector (15) for connection with said electronic board. Module differs by the fact that each connector (15) generates one semi-shell and each connector (15) interacts with one other semi-shell so that together they form the housing in which there is an electronic board (3).EFFECT: technical result is increased mechanical strength of the body.20 cl, 16 dwg

Seismic data collection system and method // 2523734
FIELD: physics; geophysics.SUBSTANCE: invention relates to geophysics and can be used in seismic exploration. The invention discloses a seismic exploration method, as well as an apparatus and a system for carrying out said method. The method includes receiving data on particle movement and rotational speed. Data on particle speed are used to obtain a wave field characteristic and data on rotational speed are intended for displaying a wave field gradient characteristic. The apparatus includes an arrangement of seismic sensor units which are configured to take measurements associated with seismic exploration carried out on a surface. Each seismic sensor unit includes a particle movement sensor and a rotation sensor. An image of the investigated geologic environment is constructed from the found values of the wave field characteristic and wave field gradient.EFFECT: high accuracy of exploration data.18 cl, 13 dwg

Connection system for seismometer cable assembly // 2521154
FIELD: machine building.SUBSTANCE: present invention relates to marine seismic researches and, in particular, to a connection system intended for connection of equipment to a marine seismometer cable assembly and disconnection of it from the latter. The proposed group of inventions comprises a connection system to attach an external device to the section of an underwater cable, a bush for rotary joint of the external device to a seismic cable, a method to connect the external device, installed on the underwater cable and fixed to a pair of cups, to a pair of bushes each of which is fitted by a belt element and a raised projection, as well as a method to disconnect the external device, installed on the underwater cable and fixed to a pair of cups each of which is made with a gap, from a pair of bushes each of which is fitted by a raised projection. The connection system comprises the first bush fixed around the underwater cable in a certain location point and fitted by a belt element and a raised projection on its outer surface, the second bush fixed around the underwater cable at a distance from the first bush and fitted by a belt element and a raised projection on its outer surface, the first C-shape cup attached to the first bush so that to be able of turning to the first bush and fitted by the inner surface intended for sliding along the belt element of the first bush, and a gap formed in the said cup by the longitudinal opening between the ends of the C-shape profile while the width of the opening between the said ends is more than the maximal circular size of the projection provided on the first bush or is equal to it, the second C-shape cup attached to the second bush so that to be able of turning to the second bush and fitted by the inner surface intended for sliding along the belt element of the second bush, and a gap formed in the said cup by the longitudinal opening between the ends of the C-shape profile while the width of the opening between the said ends is more than the maximal circular size of the projection provided on the second bush or is equal to it. The proposed bush is fitted by a belt element passing in circular direction around the bush periphery, a raised collar set on the rear end of the belt element and a raised collar set on the opposite front end of the belt element and passing along the part of the bush periphery. The proposed connection method of the external device involves connection of the pair of cups provided with gaps to the external device, turning of bushes in respect to each other to match the projections made on both bushes, pulling of the cups onto the cable in radial direction through the said gap, moving of the cups in the longitudinal direction along the cable so that the matched projections pass through the gaps to the specified position around the inner bush and turning of bushes in respect to each other to shift the projections in respect to each other. The proposed disconnection method of the external device involves turning of bushes in respect to each other to match the projections made on both bushes, moving of the cups in the longitudinal direction along the bushes so that the matched projections are in the gaps until they pass the bush and demounting of the cup fixed to the external device from the cable in radial direction.EFFECT: at following sea, the said external devices are provided with reliable fixation and such pushing forward of the external device is prevented when the cups are disengaged from the belt elements, the above is ensured due to the fact that the projection prevents the cup from leaving the belt element when the gap is shifted circumferentially in relation to the projection.26 cl, 7 dwg

Seismic prospecting // 2396578
FIELD: mining.SUBSTANCE: there is generated seismic disturbance and it is directed to ground surface; to detect response to disturbance there is used interferometre; the said response in form of transferred particles on ground surface is traced and recorded at stage of detecting; transfer of particles on ground surface is analysed during response period at analysing stage. On the interferometre an array of detectors is arranged into a line running in the same direction as a cross component Vt of rate of relative motion of ground surface particles. Also the detectors are arranged to detect light rays with different angular direction. A formed reference beam of coherent light is united with an object beam reflected from surface to obtain mutual interference in form of a speckle structure representing information on relative motion of surface and the interferometre. There is determined a detector in the array with zero or minimal response to total rate Vtot of motion, thus identifying the detector with response direction line which is arranged normally to Vtot. In this way there is established change of direction of Vtot with course of time related to change with cross component V1.EFFECT: simplification of seismic prospecting procedure with detection of P and S- waves.51 cl, 15 dwg
 
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