CN202854351U - Single cabin ball three-component seafloor magnetometer - Google Patents

Single cabin ball three-component seafloor magnetometer Download PDF

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Publication number
CN202854351U
CN202854351U CN 201220493697 CN201220493697U CN202854351U CN 202854351 U CN202854351 U CN 202854351U CN 201220493697 CN201220493697 CN 201220493697 CN 201220493697 U CN201220493697 U CN 201220493697U CN 202854351 U CN202854351 U CN 202854351U
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China
Prior art keywords
ball
cabin
fixed
sensor
magnetometer
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Expired - Fee Related
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CN 201220493697
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Chinese (zh)
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黄松
徐亚
郝天珧
游庆瑜
赵春蕾
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Institute of Geology and Geophysics of CAS
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Institute of Geology and Geophysics of CAS
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Abstract

The utility model discloses a single cabin ball three-component seafloor magnetometer which comprises a tripping mechanism (1), an instrument cabin (2) and a base (6). An internal part of the instrument cabin (2) is fixed with a glass cabin ball, the tripping mechanism (1) is positioned at a top end of the instrument cabin (2), and the base (6) is positioned at a bottom end of the instrument cabin (2). The tripping mechanism (1) and the base (6) are fixedly connected through a tension steel wire, and the instrument cabin (2) is fixed in the base (6). The single cabin ball three-component seafloor magnetometer is used for seafloor magnetic field observation, oil and gas exploration and geological survey. Seafloor magnetic field measuring functions of the single cabin ball three-component seafloor magnetometer are integrated in one cabin ball, and problems of complex system, low direction positioning accuracy and inconvenient release and withdrawing of an existing seafloor magnetic detection device are solved.

Description

Single cabin ball three-component sea bottom magnetometer
Technical field
The utility model belongs to the geophysical survey field, specifically belongs to the marine surveys field, and it relates to a kind of seabed field signal detection instrument.
Background technology
Ocean EM exploration is one of a kind of main marine geophysical survey means, and it is applicable to that seismic method be difficult for to be differentiated and electromagnetic method has the zone of advantage, such as carbonate reef arteries and veins, boss, volcanics covering, seabed permafrost band etc.Because complicacy and the excessive risk of sea area mineral resources exploration adopt Comprehensive Geophysics to gather to reduce risks, and improve success ratio and have become the important means that developed country carries out the marine site resource exploration.Being combined in of electromagnetic prospecting and seismic prospecting reduces multi-solution, reduction exploration risk aspect effect is remarkable.Simultaneously, in the shallow sea or sea beach area, electromagnetic survey can also be used to solve some oceanographic engineering problems.Dropped at present the development and application that a large amount of manpower and materials are carried out the ocean EM exploration instrument both at home and abroad.
The seabed magnetic-field measurement generally gathers three components of level and vertical pairwise orthogonal, and each component adopts a coil type Magnetic Sensor usually, and in order to resist seawater pressure, each Magnetic Sensor has independent pressure-bearing cabin.Other parts need other pressure-bearing cabin such as data acquisition component, power supply etc., and in order to realize automatically floating function, need a plurality of cabins ball that buoyancy is provided.According to domestic and international disclosed Patents, the seabed electromagnetic field device generally adopts the similar techniques scheme to realize seabed three-component magnetic-field measurement.System complex, the volume weight of this technical scheme is large, power consumption is high, offshore construction is inconvenient.
The another one difficult problem of seabed magnetic field observation is exactly the accurate detection of instrument attitude.In the prior art three direction sensors such as Magnetic Sensor, aspect sensor, attitude sensor are encapsulated in different pressure-bearings cabin respectively, but how harmonious between these three sensors be a difficult problem that never solves.
Face the complicated of marine surveys, also more and more higher to the instrument requirement of marine surveys.The problem that how to solve miniaturization, the low-power consumption of instrument and accurately detect is focus and the difficulties that this area researchist pays close attention to always.
The utility model content
For the deficiencies in the prior art and problem, it is little and light to the utility model proposes a kind of volume, makes things convenient for offshore construction and throws in the single cabin ball three-component sea bottom magnetometer that reclaims.
According to the technical solution of the utility model, a kind of single cabin ball three-component sea bottom magnetometer is provided, comprise uncoupling rigging 1, instrument room 2 and base 6; Wherein instrument room 2 inside are fixed with glass cabin ball, and uncoupling rigging 1 is positioned at instrument room 2 tops, and base 6 is positioned at instrument room 2 bottoms; Affixed with taut wire between uncoupling rigging 1 and base 6, instrument room 2 is fixed in the base 6; Wherein said single cabin ball three-component sea bottom magnetometer also comprises safety loop 3, taut wire 4, locking Luo bolt 5, base 6, underwater sound sensor 7, glass cabin ball 8, data acquisition unit 9, Magnetic Sensor 11, aspect sensor 12 and attitude sensor 13 and electric supply installation 15; Safety loop 3 is the plastic hoop of external diameter 55cm, internal diameter 45cm, thick 0.6cm; Taut wire 4 is used for fixedly uncoupling rigging and base; Locking Luo bolt 5 is used for fastening taut wire 4 and base 6; Data acquisition unit 9, Magnetic Sensor 11, aspect sensor 12 and attitude sensor 13 are installed on ball 8 inside, glass cabin by fixed support 10 and coupling support 14.
Preferably, glass cabin ball outer tip end is fixed with underwater sound sensor.Glass cabin ball is withstand voltage hollow glass ball.Fixed support is the double-ring structure.The coupling support is the tabular structure of triangle, is installed in the fixed support bottom.
Preferably, described Magnetic Sensor 11 adopts three axis fluxgates probe.Described Magnetic Sensor 11, aspect sensor 12, attitude sensor 13 are fixedly installed on the coupling support 14 together; On the Magnetic Sensor 11 fixed orifice is arranged, be fixed by screws in the centre position of coupling support 14; 13 of aspect sensor 12 and attitude sensors are fixed by screws in the avris of coupling support 14.
Preferably, described uncoupling rigging is bolted the top that is installed on instrument room; Uncoupling rigging is double-decker, comprise stainless steel Luo post, ring Luo bar back up pad, wrapping wire fixed head, wherein, be arranged in parallel up and down around silk fixed head and ring Luo bar back up pad, with several stainless steels Luo post that both are affixed, interconnect after two Luo posts in the stainless steel Luo post pass the wrapping wire fixed head, consist of suspension hook; Luo bar back up pad diameter of bore and instrument room top outside diameter are suitable; Be provided with positive pole, unhook slide block, wrapping wire nail, negative pole around silk fixed head upper surface, a steel wire is followed closely the coiled ring through anodal and order through all wrapping wires, and tighten up the location with set nut and wrapping wire nail.
Use the technical solution of the utility model, can have following beneficial effect:
1, this sea bottom magnetometer that provides of the utility model has solved existing seabed field detecting device system complex, has been not easy to marine the input and the problems such as recovery.
2, this sea bottom magnetometer that provides of the utility model, the field signal sensor does not need to use separately pressure-bearing cabin separate package, can be installed on the same coupling support with the coupling of device attitude sensor, reduce position angle and inclination angle error that field signal is measured.
3, this sea bottom magnetometer that provides of the utility model, the device overall power is low, has prolonged the working time of device, can be used for staying for a long time sea observation.
Description of drawings
Fig. 1 is according to single cabin of the present utility model ball sea bottom magnetometer three-dimensional structure diagram;
Fig. 2 is according to ball sea bottom magnetometer longitudinal section, single cabin of the present utility model synoptic diagram;
Fig. 3 is according to single cabin of the present utility model ball sea bottom magnetometer uncoupling rigging synoptic diagram;
Fig. 4 is according to single cabin of the present utility model ball sea bottom magnetometer understructure synoptic diagram.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, for single cabin of the present utility model ball three-component sea bottom magnetometer three-dimensional structure diagram, mainly formed by uncoupling rigging 1, instrument room 2 and base 6 three parts.Instrument room 2 is placed on the base 6, safety loop 3 is installed in the middle part of instrument room 2, and uncoupling rigging 1 places instrument room 2 tops, be wound in fixed interface on the uncoupling rigging 1 with many taut wires 4 after, with many taut wires 4 of a plurality of clamping screw 5 tensions, instrument room 2 and base 6 are fixed together.Described single cabin ball three-component sea bottom magnetometer compact overall structure, volume are little, lightweight, make things convenient for the offshore construction operation.
As shown in Figure 2, instrument room 2 is divided into second cabin, and instrument room 2 interior placing glass cabin balls 8 are fixed glass cabin ball 8 by spiral compression.Safety loop 3 is a circular ring plastic plate, by spiral compression upper second junction, cabin at instrument room 2, is used for instrument room 2 structural defences.Glass cabin ball 8 is divided into upper and lower hemispheres, and seam crossing seals by clay and adhesive tape.Underwater sound sensor 7 is installed in glass cabin ball 8 episphere outer tip end, is used for the underwater acoustic communication signal and receives and reply.Integral structure is adopted in the inside of glass cabin ball 8, fixed support 10 is installed in ball 8 inside, glass cabin, data acquisition unit 9 is installed in the top of fixed support 10, and electric supply installation 15 is installed in all sides of fixed support 10, and coupling support 14 is installed in the bottom of fixed support 10.Magnetic Sensor 11, aspect sensor 12 and 13 of attitude sensors are fixed on the coupling support 14.
Instrument room 2 is the engineering plastics material, and the machinery that is used for single cabin each parts of ball three-component sea bottom magnetometer is fixed and internal Protection.17 inches hollow glass balls that glass cabin ball 8 adopts Vitrovex company to produce, withstand voltage 6500 meters depth of waters after the sealing are used for the withstand voltage protection of intraware, and the buoyancy of whole device is provided simultaneously.
Magnetic Sensor 11 is for detection of the seabed field signal, adopt three axis fluxgates probe, the probe measurement frequency range is 0-3KHz, internal noise is less than 6pTrms/ √ Hz@1Hz, shell sizes is 3.2 * 3.2 * 15.2cm, has that volume is little, a compact conformation, frequency band range is wide, noise is low advantage.Because volume is little, this parts overall package does not need to use separately pressure-bearing cabin separate package in the glass cabin ball 8, has simplified the structural design of single unit system.
Adopt the design of compact, broadband, low noise three axis fluxgates probe to have obvious advantage at aspects such as system architecture, volume weight, power consumption, cost, offshore construction difficulty.This probe can directly be encapsulated in the ball of glass cabin, does not need independent pressure-bearing cabin, has reduced the volume weight of measurement mechanism.Its power consumption is little, has reduced the battery demand and supply in seabed, has prolonged and has stayed extra large observation time.The system architecture of device has been simplified in the use of single cabin ball, is beneficial to offshore construction and throws in recovery.
Aspect sensor 12 adopts HMR3200 type digital compass for detection of the X-axis of three-component fluxgate and the magnetic declination of earth magnetism direct north, with digital interface, has in axial high sensitivity and linear high-precision characteristics, and precision is controlled at 1 °.Attitude sensor 13 is for detection of the X-axis of three-component fluxgate and the pitch angle of Y-axis and surface level, adopt ADXL345 type digital accelerometer, its power consumption is ultralow, resolution high (13), measurement range reaches ± 16g, it can measure the static weight acceleration in tilt detection is used, its high resolving power (3.9mg/LSB) can be measured the angle change less than 1.0 °.
Coupling support 14 is the rigid block movement of an engineering plastics material, and the tabular structure of triangle is installed in the bottom of fixed support 10.On the Magnetic Sensor 11 fixed orifice is arranged, be fixed by screws in the centre position of coupling support 14,13 of aspect sensor 12 and attitude sensors are fixed by screws in the avris of coupling support 14 upper ends, by data line Magnetic Sensor 11, aspect sensor 12 and attitude sensor 13 are connected to data acquisition unit 9.Sea bottom magnetometer of the prior art adopts subdivision body mechanical means usually, and the orientation of magnetic-field measurement and attitude error are difficult to control, usually greater than more than 3 °.And adopt integrative installation technology mode of the present utility model to guarantee the alignment of magnetic-field measurement and attitude detection, effectively reduce the attitude detection error that separation machinery fixedly brings, make 1 ° of the index that detects the basic proximity transducer of error, improve the accuracy that field signal is measured.
Particularly, Magnetic Sensor, aspect sensor, attitude sensor are fixedly installed in coupling have together reduced position angle and inclination angle error that magnetic signal is measured on the support, the precision of actual attitude is controlled in the error range of accelerometer and direction sensor.The Magnetic Sensor of comparing three directions encapsulates in different pressure-bearings cabin respectively with aspect sensor, attitude sensor, has improved the precision of attitude measurement.
Data acquisition unit 9 is used for collection and the storage of each sensor detection signal, wherein: a) front discharge road signal input part adds and joins single order Passive LC low pass frequency overlapped-resistable filter, adopt utmost point low-noise accurate dual operational amplifier to consist of the instrument amplification circuit, gain is 30dB, it is 10nv/ √ Hz@1Hz that the amplifying circuit noise is folded to input end, has very high antijamming capability; B) oscillatory circuit of instrument employing temperature compensating crystal oscillator formation is as internal clocking, and its precision is better than 5 * 10 in 0 ℃ to 4 ℃ temperature range -8C) data storage capacity is 32G; D) adopt CMOS type device, low voltage power supply, the work clock of lower frequency reduces the idle power consumption of system, overall power＜0.3W simultaneously.The power supply supply burden that alleviated low in energy consumption of single unit system has guaranteed to stay the sea activity duration.
Electric supply installation 15 adopts lithium battery, and magnetometer adopts 10 pieces of 10AH lithium batteries at the bottom of every Taiwan Straits, lithium battery is installed on the side all around of fixed support 10 by Plastic Bandage.
As shown in Figure 3, uncoupling rigging 1 is double-decker, comprise stainless steel Luo post 16, ring Luo bar back up pad 17, wrapping wire fixed head 21, wherein, be arranged in parallel up and down around silk fixed head 21 and ring Luo bar back up pad 17, with several stainless steels Luo post 16 that both are affixed, after passing wrapping wire fixed head 21, two Luo posts in the stainless steel Luo post 16 interconnect, consist of suspension hook 20; Ring Luo bar back up pad 17 diameter of bores and instrument room 2 top outside diameters are suitable.Wrapping wire fixed head 21 upper surfaces are provided with positive pole 24, unhook slide block 18, wrapping wire nail 19, negative pole 22; positive pole 24, negative pole 22 are positioned at the relative both sides of wrapping wire fixed head 21 diameter of bore directions; set nut 25 is spirally connected behind the socket silk pressing pad 15 on anodal 24; set nut 25 is spirally connected behind the socket silk pressing pad 15 on the socket negative pole protective sleeve 23, anodal 24 on the negative pole 22.A steel wire is followed closely 19 coiled rings with order through all wrapping wires through anodal 24, and tighten up the location with set nut 25 and wrapping wire nail 19, unhook slide block 18 is fixed on the wrapping wire fixed head 21, steel wire and two negative poles 22 touch.Utilize characteristic of ocean when instrument reclaims, carry out the electrocorrosion steel wire at two striking point places, unhook slide block 18 is tightened up steel wire 4 and pulls out, and instrument room 2 namely utilizes the buoyant of sea water come-up.
This embodiment is not shown specifically uncoupling rigging 1 in Figure of description, its concrete structure sees also already disclosed technical information of the applicant.
As shown in Figure 4, base 6 adopts glass-reinforced plastic material to make, and sets firmly a disk in the groined type upper surface middle part, and the diameter of disk and instrument room 2 bottom cylindricals are suitable, are used for 2 bottoms, retainer instrument cabin.Base 6 bottom peripheral edge places are uniform-distribution with 8 locking Luo bolts 5; Clamping screw 5 is dismountable affixed with taut wire 4 lower ends, closely link to each other with uncoupling rigging 1 by four corrosion-resistant taut wires 4, its weight and volume is suitable for control rate of sinking and sinking attitude in the sinking process, and can keep correct attitude when instrument sinks to the seabed, and work provides reliable and stable pedestal in the seabed for sea bottom magnetometer.After instrument is received release signal, instrument room 2 come-ups, base is stayed the seabed.
The workflow of single cabin ball three-component sea bottom magnetometer is: 1) before single cabin ball three-component sea bottom magnetometer is thrown in the sea, carry out each component function test, enter next step after confirmation form cabin ball three-component sea bottom magnetometer function is normal, otherwise return maintenance; 2) carry out across the sea GPS to the parameter of clock and setting recording time and collection; 3) single cabin ball three-component sea bottom magnetometer is thrown in into the sea, and made it be lowered into the seabed at Action of Gravity Field, according to setting-up time and continuous parameters recording magnetic field signal and attitude information, and be stored in the internal storage in the ball three-component sea bottom magnetometer of single cabin; 4) reclaim single cabin ball three-component sea bottom magnetometer, send the recovery signal in this marine site, ball three-component sea bottom magnetometer place, list cabin by sonar system, after single cabin ball three-component sea bottom magnetometer is received signal, begin the steel wire that fuses, instrument room and base break away from after about 5 minutes, instrument room floats automatically to the water surface, then instrument room is salvaged and is gone on board; 5) extract recorded data and carry out analyzing and processing.
Above-described implementation example; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is implementation example of the present utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (8)

1. single cabin ball three-component sea bottom magnetometer comprises uncoupling rigging (1), instrument room (2) and base (6); Wherein instrument room (2) inside is fixed with glass cabin ball, and uncoupling rigging (1) is positioned at instrument room (2) top, and base (6) is positioned at instrument room (2) bottom; Affixed with taut wire between uncoupling rigging (1) and base (6), instrument room (2) is fixed in the base (6); It is characterized in that:
Described single cabin ball three-component sea bottom magnetometer also comprises safety loop (3), taut wire (4), locking Luo bolt (5), base (6), underwater sound sensor (7), glass cabin ball (8), data acquisition unit (9), Magnetic Sensor (11), aspect sensor (12) and attitude sensor (13) and electric supply installation (15); Safety loop (3) is the plastic hoop of external diameter 55cm, internal diameter 45cm, thick 0.6cm; Taut wire (4) is used for fixedly uncoupling rigging and base; Locking Luo bolt (5) is used for fastening taut wire (4) and base (6); Data acquisition unit (9), Magnetic Sensor (11), aspect sensor (12) and attitude sensor (13) are installed on glass cabin ball (8) inside by fixed support (10) and coupling support (14).
2. by single cabin claimed in claim 1 ball three-component sea bottom magnetometer, it is characterized in that glass cabin ball outer tip end is fixed with underwater sound sensor.
3. by single cabin claimed in claim 1 ball three-component sea bottom magnetometer, it is characterized in that glass cabin ball is withstand voltage hollow glass ball.
4. by single cabin claimed in claim 1 ball three-component sea bottom magnetometer, it is characterized in that fixed support is the double-ring structure.
5. by single cabin claimed in claim 1 ball three-component sea bottom magnetometer, it is characterized in that the coupling support is the tabular structure of triangle, is installed in the fixed support bottom.
6. by single cabin claimed in claim 1 ball three-component sea bottom magnetometer, it is characterized in that described Magnetic Sensor (11) adopts three axis fluxgates probe.
7. by single cabin claimed in claim 1 ball three-component sea bottom magnetometer, it is characterized in that described Magnetic Sensor (11), aspect sensor (12), attitude sensor (13) are fixedly installed on the coupling support (14) together; Magnetic Sensor has fixed orifice on (11), is fixed by screws in the centre position of coupling support (14); Aspect sensor (12) and attitude sensor (13) then are fixed by screws in the avris of coupling support (14).
8. by single cabin claimed in claim 1 ball three-component sea bottom magnetometer, it is characterized in that described uncoupling rigging is bolted the top that is installed on instrument room; Uncoupling rigging is double-decker, comprises stainless steel Luo post, ring Luo bar back up pad, wrapping wire fixed head; Wherein, be arranged in parallel up and down around silk fixed head and ring Luo bar back up pad, with several stainless steels Luo post that both are affixed.
CN 201220493697 2012-09-26 2012-09-26 Single cabin ball three-component seafloor magnetometer Expired - Fee Related CN202854351U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102854538A (en) * 2012-09-26 2013-01-02 中国科学院地质与地球物理研究所 Single-cabin-ball three-component submarine magnetometer
CN111812693A (en) * 2020-06-28 2020-10-23 中国科学院地质与地球物理研究所 Long-baseline time scale positioning array and control method thereof
CN114200531A (en) * 2022-02-16 2022-03-18 自然资源部第二海洋研究所 Multi-component submarine magnetic field measurement method and device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102854538A (en) * 2012-09-26 2013-01-02 中国科学院地质与地球物理研究所 Single-cabin-ball three-component submarine magnetometer
CN102854538B (en) * 2012-09-26 2013-06-05 中国科学院地质与地球物理研究所 Single-cabin-ball three-component submarine magnetometer
CN111812693A (en) * 2020-06-28 2020-10-23 中国科学院地质与地球物理研究所 Long-baseline time scale positioning array and control method thereof
CN111812693B (en) * 2020-06-28 2021-04-20 中国科学院地质与地球物理研究所 Long-baseline time scale positioning array and control method thereof
CN114200531A (en) * 2022-02-16 2022-03-18 自然资源部第二海洋研究所 Multi-component submarine magnetic field measurement method and device
CN114200531B (en) * 2022-02-16 2022-05-17 自然资源部第二海洋研究所 Multi-component submarine magnetic field measurement method and device

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