CN201654244U - Shallow sea four-component earthquake information acquisition apparatus - Google Patents
Shallow sea four-component earthquake information acquisition apparatus Download PDFInfo
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- CN201654244U CN201654244U CN2010201615443U CN201020161544U CN201654244U CN 201654244 U CN201654244 U CN 201654244U CN 2010201615443 U CN2010201615443 U CN 2010201615443U CN 201020161544 U CN201020161544 U CN 201020161544U CN 201654244 U CN201654244 U CN 201654244U
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Abstract
The utility model relates to a shallow sea four-component earthquake information acquisition apparatus; which comprises a shell, a top cover, a piezoelectric detector, an upper clapboard, a gimbal table, a sleeve, a lower clapboard and three magnetoelectric detectors; the shell consists of an upper cylindrical shell and a lower cylindrical shell connected by a middle pipeline to form an upper part and a lower part of the shell; the top cover is disposed at the top end of the upper part of the shell, and the piezoelectric detector is arranged in the upper part of the shell; the upper clapboard and the lower clapboard are arranged in the lower part of the shell in parallel and spaced way; the gimbal table is positioned between the upper clapboard and the lower clapboard, and comprises an adjusting disc, a support ring and an inner automatic adjusting frame and an outer automatic adjusting frame; the outer automatic adjusting frame is arranged on the inner wall of the shell between the upper clapboard and the lower clapboard correspondingly, and the outer side of the arranged support ring is correspondingly matched with the outer automatic adjusting frame in rotating way; the adjusting disc is arranged in the support ring in parallel, and is matched with the inner automatic adjusting frame arranged on the support ring axially and vertically in rotating way; and the three magnetoelectric detectors are respectively embedded into location notches arranged on the upper surface of the adjusting disc, and the sleeve is sleeved at the bottom end of the lower part of the shell. The utility model has advantages of simple structure and reliable performance.
Description
Technical field
The utility model relates to a kind of earthquake information and obtains instrument, and particularly a kind of shallow sea four component earthquake information is obtained instrument.
Background technology
At present, marine multi-wave seismic exploration in fact mainly is the transformed wave exploration, promptly excites in the water, and the seabed receives the record that obtains compressional wave and transformed wave.From discipline development, Multi-wave and Multi-component Seismic Exploration makes seismic prospecting develop into the vector earthquake of measurement vector (three-component) by the scalar earthquake of observation scalar (single Z component), is developed into the many ripples explorations that utilize P ripple, S ripple and transformed wave simultaneously by the longitudinal wave exploration that only utilizes the P ripple; Tectonic earthquake by main research structural feature develops into the lithology earthquake of studying structure, stratum, lithology and oil gas simultaneously, makes seismic prospecting generation qualitative leap.
In high-resolution seismic survey, the problem of a key is effectively to suppress the high frequency environment noise, improves the signal to noise ratio (S/N ratio) of high-frequency signal.How to satisfy this point, can obtain high-quality original earthquake data, the seismic signal that the reception dynamic range is bigger, frequency band is wideer, degree of distortion is lower, signal to noise ratio (S/N ratio) is higher than the conventional method collection, provide a kind of simple to operate, obvious results shallow sea four component earthquake information to obtain instrument, have very important significance for practical application, become one of these those skilled in the art problem anxious to be addressed simultaneously.
The utility model content
The purpose of this utility model is to overcome above-mentioned weak point, provides a kind of simple and practical, obvious results shallow sea four component earthquake information to obtain instrument.
The technical scheme that the utility model adopted is for achieving the above object: a kind of shallow sea four component earthquake information is obtained instrument; It is characterized in that this obtains instrument and comprises shell, top cover, piezoelectric seismometer, upper spacer, gimbal, sleeve, lower clapboard and three magneto-electric wave detectors; Described shell is to constitute the shell upper and lower part by two cylinder shells up and down that intermediate duct links to each other, and described top cover is located at the shell upper top, and the built-in piezoelectric seismometer of shell upper; Spaced and parallel is provided with upper and lower dividing plate in the described outer casing underpart; Described gimbal is arranged between the interior upper and lower dividing plate of outer casing underpart housing, and gimbal comprises adjustment disk, support ring and inside and outside automatic adjusting bracket; Be rotatably assorted outside the parallel support ring that is provided with between upper spacer and the lower clapboard, and the outer casing inner wall correspondence is provided with outer adjusting bracket automatically, described outer adjusting bracket automatically and support ring; The parallel adjustment disk of establishing an oblate cylindricality in the support ring, and with support ring on axially the vertical interior automatic adjusting bracket that is provided be rotatably assorted; Described adjustment disk upper surface is provided with locating slot, and described three magneto-electric wave detectors are embedded in the locating slot respectively; The sheathed sleeve in described outer casing underpart bottom; Described three magneto-electric wave detectors are orthogonal thereto on the XYZ direction, and are consistent with Cartesian coordinates, promptly are made up of a vertical magneto-electric wave detector and two horizontal magneto-electric wave detectors; When the Z of three-component seismometer axle and the earth's core direction were inconsistent, because of action of gravity, gimbal can freely rotate, and makes its Z axle consistent with the earth's core direction; Three-component magneto-electric wave detector is as the vitals that picks up the submarine earthquake signal, and the seismic event that any direction is next is decomposed into three components of X, Y, Z of Cartesian coordinates, wherein the big line trend on the X coordinate points surface level; Between upper spacer and lower clapboard, oil body is filled in the gap of described three magneto-electric wave detectors and shell, gimbal, to guarantee the stability of three-component seismometer work; This top cover that obtains instrument is provided with in order to draw the fairlead of piezoelectric seismometer and three magneto-electric wave detector leads.
Described sleeve is provided with pod apertures.
Described upper and lower dividing plate and shell junction are respectively equipped with the round rubber O-ring seal.
The beneficial effects of the utility model are: the principal feature in the utility model can obtain high-quality original earthquake data, than the seismic signal that the reception dynamic range is bigger, frequency band is wideer, degree of distortion is lower, signal to noise ratio (S/N ratio) is higher of conventional method collection.The shell that shallow sea four component earthquake information is obtained instrument has adopted the injection moulding of polyamine fat material, and is withstand voltage, corrosion-resistant, good insulating, good seal performance.Fill oil body in gimbal and the upper and lower dividing plate space,, guarantee that wave detector picks up the weak vibration that seismic event conduction seabed causes in order to satisfy the requirement of damping and coupled characteristic.In addition, adopt multiple-sealed structures such as upper and lower dividing plate and O-ring seal, prevent inside and outside seepage, guarantee the wave detector operate as normal.The utility model is simple in structure, and is reasonable in design, dependable performance, use easy, the effect highly significant.
Description of drawings
Fig. 1 is the utility model one-piece construction synoptic diagram;
Fig. 2 is a gimbal structural representation in the utility model;
Among the figure: 1 top cover; 2 piezoelectric seismometers; 3 upper spacers; 4 gimbals, 4-1 adjustment disk, the outer adjusting bracket automatically of 4-2, automatic adjusting bracket in the 4-3 support ring, 4-4,4-5 through hole; 5 sleeves; 6 pod apertures; 7 lower clapboards; 8 O-ring seals; 9 shells; 10 oil bodies; 11 magneto-electric wave detectors; 12 fairleads.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, details are as follows to embodiment that foundation the utility model provides:
Referring to Fig. 1, Fig. 2, a kind of shallow sea four component earthquake information is obtained instrument; This obtains instrument and comprises shell, top cover 1, piezoelectric seismometer 2, upper spacer 3, gimbal 4, sleeve 5, lower clapboard 7 and three magneto-electric wave detectors 11; Described shell 9 is to constitute shell 9 upper and lower parts by two cylinder shells up and down that intermediate duct links to each other, and described top cover 1 is located at shell 9 upper end, and the built-in piezoelectric seismometer 2 in shell 9 tops; Spaced and parallel is provided with upper spacer 3 and lower clapboard 7 in described shell 9 bottoms; Described gimbal 4 is arranged between the interior upper spacer 3 of shell 9 lower case, the lower clapboard 7, and gimbal 4 comprises adjustment disk 4-1, support ring 4-3 and inside and outside automatic adjusting bracket 4-4,4-2; Parallelly between upper spacer 3 and the lower clapboard 7 be provided with support ring 4-3, and shell 9 inwall correspondences are provided with outer adjusting bracket 4-2 automatically, are rotatably assorted outside described automatic adjusting bracket 4-2 and the support ring 4-3; The parallel adjustment disk 4-1 that establishes an oblate cylindricality in the support ring 4-3, and go up axially with support ring 4-3 that the vertical interior automatic adjusting bracket 4-4 that is provided with is rotatably assorted; The adjustment disk 4-1 upper surface of the oblate cylindricality of described stainless steel is provided with locating slot, and described three magneto-electric wave detectors 11 are embedded in the locating slot; The sheathed sleeve 5 of described shell 9 lower bottom end; Described three magneto-electric wave detectors 11 are orthogonal thereto on the XYZ direction, and are consistent with Cartesian coordinates, promptly are made up of a vertical magneto-electric wave detector 11 and two horizontal magneto-electric wave detectors 11; When the Z of three-component seismometer axle and the earth's core direction were inconsistent, because of action of gravity, gimbal 4 can freely rotate, and makes its Z axle consistent with the earth's core direction; Three-component magneto-electric wave detector 11 is as the vitals that picks up the submarine earthquake signal, and the seismic event that any direction is next is decomposed into three components of X, Y, Z of Cartesian coordinates, wherein the big line trend on the X coordinate points surface level; The oil body 10 that rotates with each wave detector of suitable damping is filled in gap between described three magneto-electric wave detectors 11 and the shell 9; And the top cover 1 of shell 9 is provided with the fairlead 12 in order to the electrical signal lead of drawing piezoelectric seismometer 2 and three magneto-electric wave detectors 11.Described upper spacer 3, lower clapboard 7 are respectively equipped with round rubber O-ring seal 8 with shell 9 junctions.Be arranged with on the described adjustment disk 4-1 and be used to locate and the through hole 4-5 of the interior automatic adjusting bracket of counterweight.
Below the wave detector bag that forms, promptly shell 9 lower bottom end add a sleeve 5, and described sleeve 5 is provided with the steel cylinder of pod apertures 6 for the bottom; Its objective is that node type wave detector system exists unsettled situation in actual use, therefore can produce spurious resonance, its instability is relevant with the situation of putting into sea bed with the sea bed situation.For addressing this problem, a special sleeve 5 is added to right cylinder wave detector bag, promptly in the substrate of shell 9 bottoms; Simultaneously, the pod apertures 6 on the sleeve 5 is convenient to seawater and is flowed into, to guarantee the reception of seismoreceiver to seismic signal.The gimbal 4 of the utility model design be comprehensive automatic rotational structure, makes that the 3-component earthquake detector in the wave detector bag can comprehensive automatic rotation, guarantees correct reception shear wave and compressional wave.
The groundwork situation that shallow sea four component earthquake information is obtained instrument is, at sea during artificial excitation's seismic event, shear wave and compressional wave that seismic event forms through ground return are received by 3-component earthquake detector, and mechanical vibration are converted into electric signal.Because compressional wave is propagated in seawater, can cause variation in water pressure, the sensitive element of piezoelectric seismometer is experienced variation in water pressure, and pressure signal is converted to electric signal.
It is node type wave detector system that the shallow sea four component earthquake information of the utility model design is obtained instrument system, promptly be made up of a piezoelectric seismometer (claiming the seabed rich or nautical receiving set) and three mutually orthogonal magneto-electric wave detectors (vertical geophone and two horizontal geophones), this system can write down compressional wave (P ripple) and shear wave (S ripple) simultaneously.Four wave detectors are placed in the cylindrical wave detector bag, and (ROV) vertically is placed on the sea bed by telecar.
Four components of principle of work: M4C are made up of a pressure geophone and a mutually orthogonal vertical magneto-electric wave detector and two horizontal magneto-electric wave detectors.Increasing a pressure geophone is in order to utilize the pressure geophone character compacting repeatedly reflection roughly opposite with magneto-electric wave detector polarity.Conventional marine streamer is the simple component system, only uses nautical receiving set, direct-recording just P ripple.Conventional OBC (Ocean-Bottom Cable) system's use nautical receiving set and vertical geophone (form two component systems, can write down the vertical component of vector wave field) mainly are record P ripples.The reason that the M4C technology is increased input is usually can not direct-recording S ripple in order to write down.When the P ripple was propagated by rock, its behavior was subjected to rock skeleton (solid portion) and both influences of blowhole space (part is by fluid and/or gas filling).As first approximation, when the S ripple was propagated by rock, its behavior only was subjected to the influence of rock skeleton.Two other critical nature of S ripple is: their velocity of propagation approximately is half of P ripple and can not be present in the fluid that therefore, the wave detector bag must be placed on the sea bed.Writing down two kinds of Bobs only writes down a kind of wave energy and infers more information about rock and the contained fluid composition of rock.The S ripple can be projected on the border of two kinds of rocks of different densities by the P ripple and generate, and this also is the basis of M4C success.Some difference of comparing between P ripple and the S ripple:
(1) seismic work of most of petroleum industry is to utilize the P ripple, usefulness be simple component or two component technology.
(2) P Bob S ripple is in the depths approximately fast 2 times, and to very near sea bed place fast 8 to 10 times (more sometimes).
(3) the S ripple can be changed generation by the P ripple on lithologic interface.
(4) the S ripple can not exist in fluid, and the P ripple can be propagated in fluid and propagate in the fluid of being everlasting.
(5) as first approximation, the S ripple is not subjected to the influence of fluid in the space, and the P ripple is influenced.
(6) two kinds of independent a kind of ripples of Bob can provide more reservoir information.
In a word, the basic functional principle that shallow sea four component earthquake information is obtained instrument is the repeatedly reflection of character compacting that utilizes piezoelectric seismometer roughly opposite with magneto-electric wave detector polarity, reaches the compacting interference wave, and then obtains significant wave.In seismic prospecting, propagate downwards through seawater by the seismic event (P ripple) that artificial excitation's focus is produced, when compressional wave arrives a certain interphase, the conversion of ripple taking place, and then forms compressional wave (P ripple) and shear wave (S ripple).The process that the four component earthquake wave detector is accepted seismic signal can be divided into the two large divisions: a part is, when seismic event was propagated through seawater, seismic event caused that seawater pressure changes, and piezoelectric seismometer is experienced variation in water pressure, and hydraulic pressure is converted to voltage signal; Another part is that the orthogonal type three-component seismometer is accepted the seismic event (P ripple and S ripple) that reflected by the rock stratum, and vibration is converted to electric signal.Shallow sea four component earthquake information is obtained the seismic signal that instrument collects and is transferred to seismic instrument, can obtain the seabed more comprehensively, more real tectonic structure image.
Three mutually orthogonal magneto-electric wave detectors that shallow sea four component earthquake information is obtained in the instrument have essence different with traditional seismoreceiver, and its structural design will be considered following factor:
1, at Tan Hai, water network zone etc., the waters of flowing can make wave detector that horizontal position takes place and move;
2, to guarantee the wave detector optimum coupling of each physics acceptance point of wave detector;
3, overcome the interference that power frequency 50Hz brings to wave detector.
In order to overcome the interference that above factor brings for the wave detector operate as normal, therefore need a kind of 3-component earthquake detector structure that has gimbal of design.
What the 3-component earthquake detector of the utility model design adopted is XYZ orthogonal type three-component seismometer, and it is made up of a vertical geophone and two horizontal geophones.The axial array of three-component seismometer becomes the XYZ orthogonal type, and is consistent with Cartesian coordinates.The seabed 3-component earthquake detector is as the vitals that picks up the submarine earthquake signal, and the seismic event that any direction is next is decomposed into three components of X, Y, Z of Cartesian coordinates, wherein the big line trend on the X coordinate points surface level.Three axles of three wave detectors keep orthogonal, and, can freely rotate in order to make wave detector, keep Z-direction consistent with the earth's core direction, wave detector is placed on the gimbal.In practice, sea bed is rugged, and when the wave detector bag was placed on the sea bed, wave detector bag meeting run-off the straight used the purpose of gimbal to make it vertical exactly, guaranteed correct shear wave and the compressional wave of receiving.The 3-component earthquake detector that has gimbal has remedied the deficiency of conventional 3-component earthquake detector.Its structure coupling is good, the point in past is accepted the face that is converted to accept, and has improved the ability to accept of small-signal; Antijamming capability is strong, and the 50Hz of anti-power frequency mush area disturbs; Light, volume is little, and weight and present string are suitable, easy to carry, and wiring is simple, is convenient to the open-air operating efficiency that improves; Sealing fully, it is non-leakage to reach 50 meters depth of waters; The parallel all the time geometric vertical of wave detector (can place arbitrarily) core body center of gravity.
Gimbal structure in the utility model is to design only considering by the seabed robot wave detector bag vertically to be placed under the situation of sea bed.Consider when the wave detector bag vertically inserts the seabed, because the accident of terrain in seabed can cause the z axle of 3-component earthquake detector and vertical line direction inconsistent.So the effect of gimbal is to guarantee that three-component seismometer remains plumbness, the seismic signal that it is received is truer, more reliable.
Above-mentionedly with reference to embodiment this shallow sea four component earthquake information being obtained the detailed description that instrument carries out, is illustrative rather than determinate; Therefore in the variation and the modification that do not break away under the utility model general plotting, should belong within the protection domain of the present utility model.
Claims (3)
1. a shallow sea four component earthquake information is obtained instrument; It is characterized in that this instrument comprises shell, top cover, piezoelectric seismometer, upper spacer, gimbal, sleeve, lower clapboard and three magneto-electric wave detectors; Described shell is to constitute the shell upper and lower part by two cylinder shells up and down that intermediate duct links to each other, and described top cover is located at the shell upper top, and the built-in piezoelectric seismometer of shell upper; Spaced and parallel is provided with upper and lower dividing plate in the described outer casing underpart; Described gimbal is arranged between the interior upper and lower dividing plate of outer casing underpart housing, and gimbal comprises adjustment disk, support ring and inside and outside automatic adjusting bracket; Be rotatably assorted outside the parallel support ring that is provided with between upper spacer and the lower clapboard, and the outer casing inner wall correspondence is provided with outer adjusting bracket automatically, described outer adjusting bracket automatically and support ring; The parallel adjustment disk of establishing an oblate cylindricality in the support ring, and with support ring on axially the vertical interior automatic adjusting bracket that is provided be rotatably assorted; Described adjustment disk upper surface is provided with locating slot, and described three magneto-electric wave detectors are embedded in the locating slot respectively; The sheathed sleeve in described outer casing underpart bottom; Described three magneto-electric wave detectors are orthogonal thereto on the XYZ direction, and are consistent with Cartesian coordinates, promptly are made up of a vertical magneto-electric wave detector and two horizontal magneto-electric wave detectors; When the Z of three-component seismometer axle and the earth's core direction were inconsistent, because of action of gravity, gimbal can freely rotate, and makes its Z axle consistent with the earth's core direction; Three-component magneto-electric wave detector is as the vitals that picks up the submarine earthquake signal, and the seismic event that any direction is next is decomposed into three components of X, Y, Z of Cartesian coordinates, wherein the big line trend on the X coordinate points surface level; Between upper spacer and lower clapboard, oil body is filled in the gap of described three magneto-electric wave detectors and shell, gimbal; Described top cover is provided with in order to draw the fairlead of piezoelectric seismometer and three magneto-electric wave detector leads.
2. shallow sea according to claim 1 four component earthquake information is obtained instrument; It is characterized in that described sleeve is provided with pod apertures.
3. shallow sea according to claim 1 four component earthquake information is obtained instrument; It is characterized in that described upper and lower dividing plate and shell junction are respectively equipped with O-ring seal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201615443U CN201654244U (en) | 2010-04-16 | 2010-04-16 | Shallow sea four-component earthquake information acquisition apparatus |
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| CN2010201615443U CN201654244U (en) | 2010-04-16 | 2010-04-16 | Shallow sea four-component earthquake information acquisition apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782659A (en) * | 2010-04-16 | 2010-07-21 | 天津科技大学 | Maritime 4-component earthquake wave detection device |
| CN106932027A (en) * | 2017-04-24 | 2017-07-07 | 吉林大学 | Integrate the vibration of optical fiber type seabed and the level sensing device of four components |
-
2010
- 2010-04-16 CN CN2010201615443U patent/CN201654244U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782659A (en) * | 2010-04-16 | 2010-07-21 | 天津科技大学 | Maritime 4-component earthquake wave detection device |
| CN101782659B (en) * | 2010-04-16 | 2011-12-21 | 天津科技大学 | Maritime 4-component earthquake wave detection device |
| CN106932027A (en) * | 2017-04-24 | 2017-07-07 | 吉林大学 | Integrate the vibration of optical fiber type seabed and the level sensing device of four components |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101124 Effective date of abandoning: 20111221 |