CN205620560U - Super shallow sea territory seabed high accuracy gravity measurement system - Google Patents

Super shallow sea territory seabed high accuracy gravity measurement system Download PDF

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Publication number
CN205620560U
CN205620560U CN201620485470.6U CN201620485470U CN205620560U CN 205620560 U CN205620560 U CN 205620560U CN 201620485470 U CN201620485470 U CN 201620485470U CN 205620560 U CN205620560 U CN 205620560U
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China
Prior art keywords
gravimeter
seabed
shallow sea
gravity
super shallow
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CN201620485470.6U
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Inventor
刘洪波
王恩强
吴治国
孔祥明
韩玉珍
陈宏杰
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Shandong Institute of Geophysical and Geochemical Exploration
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Shandong Institute of Geophysical and Geochemical Exploration
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Abstract

The utility model relates to a super shallow sea territory seabed high accuracy gravity measurement system, including gravity appearance system, bathymetric survey appearance, navigation and positioning equipment, power supply unit, power supply unit connects gravity appearance system, bathymetric survey appearance, navigation and positioning equipment respectively, and gravity appearance system includes locater and the locater antenna of being connected with the locater including the gravity appearance that slips into the seabed, navigation and positioning equipment, and the focus of locater antenna and gravity appearance is on same plumb line. The gravity appearance sinks to seabed instantaneous reading in the twinkling of an eye to assurance measurement coordinate can be tried one's best and truly reflected the measurement station coordinate. Utilize the utility model discloses can satisfy the position error of mean square is less than the required precision that 10m reaches 2m even.

Description

A kind of super shallow sea seabed High-Precision Gravimeter Survey system
Technical field
This utility model relates to a kind of super shallow sea seabed High-Precision Gravimeter Survey system, is specifically related to 0~50m depth of water seabed high accuracy weight Force measuring system, belongs to gravity measurement field.
Background technology
At present, an ultra shallow (the 0~50m depth of water) seabed, marine site High-Precision Gravimeter Survey system mainly uses to be developed based on CG-3 type gravimeter, Being limited by instrument, automatic leveling limit is ± 15 ° under water.Hermetically sealed can is cast iron casting, and relatively cumbersome, maintenance cost is big.This system exists Big problem is to utilize GPS to carry out plane positioning waterborne, and positioning precision is poor, and plane positioning precision is at ± more than 10m, thus can only answer For small scale, low precision gravimetric prospecting.
Summary of the invention
For the deficiencies in the prior art, this utility model provides a kind of super shallow sea seabed High-Precision Gravimeter Survey system;
This utility model reasonable in design, by position finder and the improvement of localization method, positioning precision is brought up to ± 10m within, Can be applicable to High-Precision Gravimeter Survey.
The technical solution of the utility model is:
A kind of super shallow sea seabed High-Precision Gravimeter Survey system, including gravimeter system, Water depth measuring instrument, navigation equipment, power supply Device, described electric supply installation connects described gravimeter system, described Water depth measuring instrument, described navigation equipment, described gravimeter respectively System includes the gravimeter slipping into seabed, and described navigation equipment includes position finder and the position finder antenna being connected with described position finder, institute State the center of gravity of position finder antenna and described gravimeter on same vertical line.
Owing to cannot position under water, so position finder antenna with gravimeter center of gravity on same plumb line, and should sink to seabed wink at gravimeter Between instantaneous reading, with ensure measure coordinate can try one's best truly reflect measuring point coordinate.But owing to by flow action, location can produce deviation, by Test data is seen now, when the depth of water is less than 50m, utilizes the method can meet mean square error of a point and is even up to ± 2m less than specification ± 10m Required precision.
Preferred according to this utility model, described gravity measuring system also includes that winch, described gravimeter system also include and described gravimeter The control system connected by communication cable, described winch, described control system connect described electric supply installation respectively.
Control system is remotely controlled operation to gravimeter, by being coupled together with gravimeter communication cable by control system, utilizes winch to incite somebody to action Gravimeter sinks to seabed, carries out leveling and survey measurements.In order to check whether gravimeter leaks, carry out water leakage monitoring by control system, Alarm signal is sent when gravimeter leaks.In order to ensure that gravimeter keeps temperature constant state, gravimeter is entered by control system by communication cable Row heating, to ensure that gravimeter is not affected normal reading by ambient temperature.
Preferred according to this utility model, described gravity measuring system also includes workboat, described position finder, described electric supply installation, described Control system, described winch are arranged on described workboat.
Preferred according to this utility model, described Water depth measuring instrument includes the first pressure transducer, the second pressure transducer, described first pressure Force transducer is arranged in described control system, and described second pressure transducer is arranged in described gravimeter.
The principle of water-depth measurement is that the water pressure sensed by pressure transducer is changed into the signal of telecommunication, shows as water depth ratio after processing of circuit Illustrate.The depth of water: h=(P1-P2)/ρ g is asked for by formula.H represents that the depth of water, P1 represent the pressure in seabed, by the second pressure Sensor reads, and P2 represents the pressure on sea, is read by the first pressure transducer.
Preferred according to this utility model, it is provided with gas-tight silo in described gravimeter, described gas-tight silo is spheroid, a diameter of 58-62cm.
The effect one of gas-tight silo be isolation sea water to gravimeter electronic component and the immersion of circuit, two be overcome sea water flowing sensitive to gravimeter The vibration of system, thus form stable gravity measuring system.Gas-tight silo can ensure in the 600m depth of water water-tight.In order to reduce gravity Instrument is affected by current, at gas-tight silo for adding counterweight frame.
Preferred according to this utility model, described gravimeter system is INO sea-floor gravity meter gravimeter.
INO sea-floor gravity meter gravimeter is the sea-bottom gravimeter of the up-to-date development of first Dary company of Canada, the spirit of this device Quick system is still quartz spring structure, and it is with the full-automatic gravimeter of CG-5 as core, it is ensured that the high sensitivity of gravimeter.This instrument can Reading under heeling condition in ± 200 second of arcs.
Preferred according to this utility model, described position finder is GPS.
Navigation uses handhold GPS, after being input in GPS by theory measuring point, utilizes some navigation feature to navigate.
Land and the depth of water use SDCORS network RTK pattern less than 2 meters of shoal plane positioning, use many away from marine site, land plane positioning Function satellite satellite-based augmentation system (MSAS).
Preferred according to this utility model, described electric supply installation be power be the threephase generator of 10kw.
Preferred according to this utility model, described winch is hydraulic wireline winch.
Preferred according to this utility model, the power of described workboat is 400 horsepowers.
The beneficial effects of the utility model are:
This utility model position finder antenna with gravimeter center of gravity on same plumb line, and should sink to seabed moment instantaneous reading at gravimeter, Can try one's best with guarantee measurement coordinate and truly reflect measuring point coordinate, this utility model is remotely controlled operation by control system to gravimeter, passes through Control system is coupled together with gravimeter communication cable, utilizes winch that gravimeter smoothly sinks to seabed, carry out leveling and measure reading Number, positioning precision is brought up to ± below 10m by this utility model, even up to ± 2m.
Accompanying drawing explanation
Fig. 1 is the structural representation of the gravity measuring system of embodiment.
1, GPS, 2, gps antenna, 3, electromotor, 4. control system, 5, winch, 6, gravimeter, 7, pressure transducer, 8, Workboat.
Detailed description of the invention
Below in conjunction with Figure of description and embodiment, this utility model is further qualified, but is not limited to this.
Embodiment
A kind of super shallow sea seabed High-Precision Gravimeter Survey system, including workboat 8, GPS1, gps antenna 2, INO sea-floor Gravity meter gravimeter, electromotor 3, winch 5, INO sea-floor gravity meter gravimeter include gravimeter 6, Control system 4;
Arranging GPS1, electromotor 3, control system 4, winch 5 on workboat 8, gravimeter 6 slips into seabed, and GPS1 is by communication electricity Cable connects gps antenna 2, and electromotor 3 connects GPS1, winch 5, control system 4 respectively by service cable, and control system 4 passes through Communication cable connects gravimeter 6.The center of gravity of gps antenna 2 and gravimeter 6 is on a vertical line.As shown in Figure 1.
Control system 4 is remotely controlled operation to gravimeter 6, by control system 4 is coupled together with communication cable with gravimeter 6, and profit With winch 5, gravimeter 6 is sunk to seabed, carry out leveling and survey measurements.In order to check whether gravimeter 6 leaks, pass through control system 4 carry out water leakage monitoring, send alarm signal when gravimeter 6 leaks.In order to ensure that gravimeter 6 keeps temperature constant state, control system 4 By communication cable, gravimeter 6 is heated, to ensure that gravimeter 6 is not affected normal reading by ambient temperature.
Gps antenna 2 with gravimeter 6 center of gravity on same plumb line, and should sink to seabed moment instantaneous reading at gravimeter 6, to ensure Measurement coordinate can be tried one's best and truly be reflected measuring point coordinate.
INO sea-floor gravity meter gravimeter is the sea-bottom gravimeter of the up-to-date development of first Dary company of Canada, the spirit of this device Quick system is still quartz spring structure, and it is with the full-automatic gravimeter of CG-5 as core, it is ensured that the high sensitivity of gravimeter 6.This instrument Can under the heeling condition in ± 200 second of arcs reading.
INO sea-floor gravity meter gravimeter also includes self-level(l)ing device, pressure inductor 7, gas-tight silo;
Self-level(l)ing device is made up of X, Y-direction servomotor.By self-level(l)ing device can by gravimeter 6 leveling in ± 20 second of arcs, To ensure reading under level.
The effect one of gas-tight silo be isolation sea water to gravimeter 6 electronic component and the immersion of circuit, two be overcome sea water flow to gravimeter 6 The vibration of sensitive system, thus form stable measurement system.Gas-tight silo is spheroid, a diameter of 60cm, it is ensured that in the 600m depth of water Water-tight.Affected by current to reduce gravimeter 6, at gas-tight silo for adding counterweight frame.
Gravity measuring system also includes Water depth measuring instrument, and including two pressure transducers, one of them pressure transducer is arranged on described manipulation In system 4, another pressure transducer 7 is arranged in described gravimeter 6.
The principle of water-depth measurement is that the water pressure that pressure transducer 7 senses is changed into the signal of telecommunication, as water depth ratio after processing of circuit Show.The depth of water: h=(P1-P2)/ρ g is asked for by formula.H represents that the depth of water, P1 represent that the pressure P2 in seabed represents sea On pressure.
Electromotor 3 is the threephase generator of 10kw for power.
Winch 5 is hydraulic wireline winch.
The power of workboat 8 is 400 horsepowers.
Positioning precision is brought up to ± 2m by this utility model.

Claims (10)

1. a super shallow sea seabed High-Precision Gravimeter Survey system, including gravimeter system, Water depth measuring instrument, navigation equipment, Electric supply installation, described electric supply installation connects described gravimeter system, described Water depth measuring instrument, described navigation equipment respectively, described heavy Power instrument system includes the gravimeter slipping into seabed, and described navigation equipment includes position finder and the position finder sky being connected with described position finder The center of gravity of line, described position finder antenna and described gravimeter is on same vertical line.
A kind of super shallow sea seabed the most according to claim 1 High-Precision Gravimeter Survey system, it is characterised in that described gravity is surveyed Amount system also includes that winch, described gravimeter system also include the control system being connected with described gravimeter by communication cable, described winch, Described control system connects described electric supply installation respectively.
A kind of super shallow sea seabed the most according to claim 2 High-Precision Gravimeter Survey system, it is characterised in that described gravity is surveyed Amount system also includes that workboat, described position finder, described electric supply installation, described control system, described winch are arranged at described workboat On.
A kind of super shallow sea seabed the most according to claim 2 High-Precision Gravimeter Survey system, it is characterised in that the described depth of water is surveyed Amount instrument includes that the first pressure transducer, the second pressure transducer, described first pressure transducer are arranged in described control system, described the Two pressure transducers are arranged in described gravimeter.
A kind of super shallow sea seabed the most according to claim 1 High-Precision Gravimeter Survey system, it is characterised in that described gravimeter Inside being provided with gas-tight silo, described gas-tight silo is spheroid, a diameter of 58-62cm.
A kind of super shallow sea seabed the most according to claim 1 High-Precision Gravimeter Survey system, it is characterised in that described gravimeter System is INO sea-floor gravity meter gravimeter.
A kind of super shallow sea seabed the most according to claim 1 High-Precision Gravimeter Survey system, it is characterised in that described position finder For GPS.
8. according to the arbitrary described a kind of super shallow sea seabed High-Precision Gravimeter Survey system of claim 1-7, it is characterised in that described Electric supply installation be power be the threephase generator of 10kw.
A kind of super shallow sea seabed the most according to claim 2 High-Precision Gravimeter Survey system, it is characterised in that described winch is Hydraulic wireline winch.
A kind of super shallow sea seabed the most according to claim 3 High-Precision Gravimeter Survey system, it is characterised in that described workboat Power be 400 horsepowers.
CN201620485470.6U 2016-05-24 2016-05-24 Super shallow sea territory seabed high accuracy gravity measurement system Active CN205620560U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109085655A (en) * 2018-09-19 2018-12-25 中国船舶重工集团公司第七0七研究所 A kind of underwater platform gravity measurement scheme and verification method
CN111504302A (en) * 2020-05-13 2020-08-07 中国人民解放军61540部队 Gravity beacon navigation path planning method and system combining sea power information
CN113777661A (en) * 2021-08-24 2021-12-10 青岛海洋地质研究所 Offshore bottom gravity measurement device and measurement method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109085655A (en) * 2018-09-19 2018-12-25 中国船舶重工集团公司第七0七研究所 A kind of underwater platform gravity measurement scheme and verification method
CN109085655B (en) * 2018-09-19 2020-06-19 中国船舶重工集团公司第七0七研究所 Underwater platform gravity measurement scheme and verification method
CN111504302A (en) * 2020-05-13 2020-08-07 中国人民解放军61540部队 Gravity beacon navigation path planning method and system combining sea power information
CN111504302B (en) * 2020-05-13 2021-08-31 中国人民解放军61540部队 Gravity beacon navigation path planning method and system combining sea power information
CN113777661A (en) * 2021-08-24 2021-12-10 青岛海洋地质研究所 Offshore bottom gravity measurement device and measurement method
CN113777661B (en) * 2021-08-24 2022-06-28 青岛海洋地质研究所 Offshore bottom gravity measurement device and measurement method

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