CN108507548B - Measuring device and measuring method for geometrical morphology of submarine pits - Google Patents
Measuring device and measuring method for geometrical morphology of submarine pits Download PDFInfo
- Publication number
- CN108507548B CN108507548B CN201810411036.7A CN201810411036A CN108507548B CN 108507548 B CN108507548 B CN 108507548B CN 201810411036 A CN201810411036 A CN 201810411036A CN 108507548 B CN108507548 B CN 108507548B
- Authority
- CN
- China
- Prior art keywords
- inclination angle
- diameter
- sensor
- circular ring
- geomagnetic sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 7
- 239000004744 fabric Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 3
- 238000009958 sewing Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention provides a device for measuring geometrical morphology of a submarine pit, which comprises a bracket, a supporting frame and a measuring device, wherein the bracket comprises a circular ring and a conical tripod; the tripod and the circular ring are coaxially arranged, and the bottom end surface of the tripod is fixedly connected with the upper end surface of the circular ring; the diameter of the reference cloth is larger than that of the circular ring, and the periphery of the reference cloth is fixed on the circular ring; the zipper is fixedly connected with one end of the tripod far away from the circular ring; the inclination sensors are uniformly distributed on the four diameter lines of the reference cloth; the geomagnetic sensor is arranged on one diameter line on which the inclination angle sensor is arranged and used for measuring the azimuth angle of the diameter line; the inclination angle sensor and the geomagnetic sensor are respectively connected with a lead, the lead is divided into three strands, the three strands are bound at three sides of the tripod, and the three strands are bound together with the zipper after being collected; the length of the lead is greater than the water depth, and one end of the lead is connected to the reading instrument; and the reading instrument reads out the numerical values of each inclination angle sensor and the geomagnetic sensor, and then calculates the inclination angle of each inclination angle sensor and the azimuth angle of the geomagnetic sensor.
Description
Technical Field
The invention relates to the field of marine geological disasters, in particular to a device and a method for measuring geometrical forms of seabed pits.
Background
The seabed pits are one of the common geological disasters of the ocean, generally, the seabed pits are formed by three reasons, namely, under the action of strong waves, positive pressure and negative pressure cause arc shearing damage to seabed soil bodies, and partial soil bodies are continuously brought out of the original positions, so that pits are formed on the surface of the seabed; secondly, the seabed is liquefied, sand blasting and water bleeding occur, the ejected sand is taken away, and a pit is formed on the seabed; and thirdly, erosion occurs at the position with lower local seabed soil strength, and a pit is formed on the surface of the seabed. The understanding of the geometrical shape of the pits is of great significance in defining the formation mechanism, the development rule and the influence on the engineering. The traditional pit geometric shape measurement is based on a water depth measurement method, water depths at different positions are measured, and the pit geometric shape is indirectly converted.
Disclosure of Invention
The invention aims to provide a device and a method for measuring geometrical shapes of a submarine pit, which have the advantages of simple structure, convenience in implementation and accurate result.
In order to achieve the above object, the present invention provides a geometric shape measuring apparatus for a dimple in a sea floor, comprising: the device comprises a datum cloth, a bracket, a zipper, an inclination angle sensor, a geomagnetic sensor, a lead and a reading instrument;
the bracket comprises a circular ring and a conical tripod; the tripod and the circular ring are coaxially arranged, and the bottom end surface of the tripod is fixedly connected with the upper end surface of the circular ring; the diameter of the reference cloth is larger than that of the circular ring, and the periphery of the reference cloth is fixed on the circular ring; the zipper is fixedly connected with one end of the tripod far away from the circular ring;
the inclination angle sensors are uniformly distributed on four diameter lines of the reference cloth, included angles among the four diameter lines are 45 degrees, and the distance between the inclination angle sensors on each diameter line is 10-20 cm;
the geomagnetic sensor is arranged on one diameter line on which the inclination angle sensor is arranged and used for measuring the azimuth angle of the diameter line; the inclination angle sensor and the geomagnetic sensor are respectively connected with a lead, the lead is divided into three strands, the three strands are bound at three sides of the tripod, and the three strands are bound together with the zipper after being collected; the length of the lead is greater than the water depth, and one end of the lead is connected to a reading instrument; and the reading instrument reads out the numerical values of each inclination angle sensor and the geomagnetic sensor, and then calculates the inclination angle of each inclination angle sensor and the azimuth angle of the geomagnetic sensor.
In a preferred embodiment: the diameter of the reference cloth is two times or more than two times of the diameter of the circular ring.
In a preferred embodiment: the reference cloth is canvas.
In a preferred embodiment: the inclination angle sensor and the geomagnetic sensor are fixed on the reference cloth through sewing threads.
The invention also provides a method for measuring the geometrical morphology of the submarine pit by using the measuring device, which comprises the following steps:
1) firstly, connecting a measuring device on land, and transporting the measuring device to a sea level right above a pit by adopting a ship;
2) slowly lowering the measuring device by adopting a winch, enabling the central position of the reference cloth to coincide with the deepest part of the pit, connecting wires of the inclination angle sensor and the geomagnetic sensor with a reading instrument, and measuring and recording numerical values of the inclination angle sensor and the geomagnetic sensor;
3) the geometrical form of the pit section measured by the inclination angle sensors on any diameter line is drawn, and the inclination angle measured by the ith inclination angle sensor from the end is α assuming that the distance between the inclination angle sensors on a certain diameter line is LiDrawing a line segment with a length of L, and rotating the line segment by α degreesi(ii) a Drawing the distances among all the inclination angle sensors on the diameter line in sequence, and rotating the corresponding angles;
4) connecting the line segments with each rotation angle end to end in sequence; drawing a spline curve to pass through the end points of each line segment, wherein the spline curve represents the geometrical shape of the concave section at the corresponding diameter line;
5) repeating the steps 3 and 4 to obtain the geometrical forms of the sections of the pits corresponding to all the diameter lines, and further obtaining the azimuth of each section by combining the azimuth angle measured by the geomagnetic sensor.
Drawings
FIG. 1 is a front view of a measuring device in a preferred embodiment of the invention;
fig. 2 is a top view of a measuring device in a preferred embodiment of the invention.
In the figure:
Geomagnetic sensor 5
Reading instrument 7
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Referring to fig. 1 and 2, a subsea pit geometry measuring apparatus includes: the device comprises a datum cloth 1, a support 2, a zipper 3, an inclination angle sensor 4, a geomagnetic sensor 5, a lead and a reading instrument 7;
the bracket 2 comprises a circular ring and a conical tripod; the tripod and the circular ring are coaxially arranged, and the bottom end surface of the tripod is fixedly connected with the upper end surface of the circular ring; the diameter of the reference cloth 1 is larger than that of the circular ring, and the periphery of the reference cloth 1 is fixed on the circular ring; the zipper 3 is fixedly connected with one end of the tripod far away from the circular ring;
the inclination angle sensors 4 are uniformly distributed on four diameter lines of the reference cloth 1, included angles among the four diameter lines are 45 degrees, and the distance between the inclination angle sensors 4 on each diameter line is 10-20 cm;
the geomagnetic sensor 5 is arranged on one diameter line on which the inclination angle sensor 4 is arranged and used for measuring the azimuth angle of the diameter line; the inclination angle sensor 4 and the geomagnetic sensor 5 are respectively connected with a lead, the lead is divided into three strands, the three strands are bound at three sides of the tripod, and the three strands are bound with the zipper 3 after being collected; the length of the lead is greater than the water depth, and one end of the lead is connected to a reading instrument 7; the reading device 7 reads out the values of each of the inclination sensors 4 and the geomagnetic sensor 5, and further calculates the inclination of each of the inclination sensors 4 and the azimuth of the geomagnetic sensor 5.
In order to ensure that the reference cloth 1 can be adapted to the shape of the pit, the reference cloth 1 must be larger than the circular ring, and in the embodiment, the diameter of the reference cloth 1 is two times or more than the diameter of the circular ring.
In order to ensure that the reference cloth 1 has enough strength and cannot be scraped by rocks in the pit, the reference cloth 1 is canvas.
In order to ensure that the tilt sensor 4 and the geomagnetic sensor 5 do not change their positions on the reference cloth 1, the tilt sensor 4 and the geomagnetic sensor 5 are fixed to the reference cloth 1 by sewing threads.
The method for measuring the geometrical morphology of the submarine pit by using the device comprises the following steps:
1) firstly, connecting a measuring device on land, and transporting the measuring device to a sea level right above a pit by adopting a ship;
2) slowly lowering the measuring device by adopting a winch, enabling the central position of the reference cloth to coincide with the deepest part of the pit, connecting the wires of the inclination angle sensor 4 and the geomagnetic sensor 5 with a reading instrument 7, and measuring and recording the numerical values of each inclination angle sensor 4 and the geomagnetic sensor 5;
3) drawing the pit section measured by the inclination angle sensor 4 on any diameter lineGeometrical form, assuming that the pitch of each tilt sensor 4 on a certain diameter line is L, the tilt angle measured by the i-th tilt sensor 4 from the end is αiDrawing a line segment with a length of L, and rotating the line segment by α degreesi(ii) a Drawing the distances among all the inclination angle sensors 4 on the diameter line in sequence, and rotating the corresponding angles;
4) connecting the line segments with each rotation angle end to end in sequence; drawing a spline curve to pass through the end points of each line segment, wherein the spline curve represents the geometrical shape of the concave section at the corresponding diameter line;
5) repeating the steps 3 and 4 to obtain the geometrical forms of the sections of the pits corresponding to all the diameter lines, and further obtaining the azimuth of each section by combining the azimuth angle measured by the geomagnetic sensor 5.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (5)
1. A subsea pit geometry measuring device, comprising: the device comprises a datum cloth, a bracket, a zipper, an inclination angle sensor, a geomagnetic sensor, a lead and a reading instrument;
the bracket comprises a circular ring and a conical tripod; the tripod and the circular ring are coaxially arranged, and the bottom end surface of the tripod is fixedly connected with the upper end surface of the circular ring; the diameter of the reference cloth is larger than that of the circular ring, and the periphery of the reference cloth is fixed on the circular ring; the zipper is fixedly connected with one end of the tripod far away from the circular ring;
the inclination angle sensors are uniformly distributed on four diameter lines of the reference cloth, included angles among the four diameter lines are 45 degrees, and the distance between the inclination angle sensors on each diameter line is 10-20 cm;
the geomagnetic sensor is arranged on one diameter line on which the inclination angle sensor is arranged and used for measuring the azimuth angle of the diameter line; the inclination angle sensor and the geomagnetic sensor are respectively connected with a lead, the lead is divided into three strands, the three strands are bound at three sides of the tripod, and the three strands are bound together with the zipper after being collected; the length of the lead is greater than the water depth, and one end of the lead is connected to a reading instrument; and the reading instrument reads out the numerical values of each inclination angle sensor and the geomagnetic sensor, and then calculates the inclination angle of each inclination angle sensor and the azimuth angle of the geomagnetic sensor.
2. A subsea pit geometry measuring device according to claim 1, characterized in that: the diameter of the reference cloth is two times or more than two times of the diameter of the circular ring.
3. A subsea pit geometry measuring device according to claim 1, characterized in that: the reference cloth is canvas.
4. A subsea pit geometry measuring device according to claim 1, characterized in that: the inclination angle sensor and the geomagnetic sensor are fixed on the reference cloth through sewing threads.
5. A method for subsea pit geometry measurement using a measuring device according to any of claims 1-4, characterized by the steps of:
1) firstly, connecting a measuring device on land, and transporting the measuring device to a sea level right above a pit by adopting a ship;
2) slowly lowering the measuring device by adopting a winch, enabling the central position of the reference cloth to coincide with the deepest part of the pit, connecting wires of the inclination angle sensor and the geomagnetic sensor with a reading instrument, and measuring and recording numerical values of the inclination angle sensor and the geomagnetic sensor;
3) inclination angle sensor measurement on any diameter lineThe geometry of the pit section obtained is that assuming that the pitch of the tilt sensors on a certain diameter line is L, the tilt angle measured by the ith tilt sensor from the end is αiDrawing a line segment with a length of L, and rotating the line segment by α degreesi(ii) a Drawing the distances among all the inclination angle sensors on the diameter line in sequence, and rotating the corresponding angles;
4) connecting the line segments with each rotation angle end to end in sequence; drawing a spline curve to pass through the end points of each line segment, wherein the spline curve represents the geometrical shape of the concave section at the corresponding diameter line;
5) repeating the steps 3 and 4 to obtain the geometrical forms of the sections of the pits corresponding to all the diameter lines, and further obtaining the azimuth of each section by combining the azimuth angle measured by the geomagnetic sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810411036.7A CN108507548B (en) | 2018-05-02 | 2018-05-02 | Measuring device and measuring method for geometrical morphology of submarine pits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810411036.7A CN108507548B (en) | 2018-05-02 | 2018-05-02 | Measuring device and measuring method for geometrical morphology of submarine pits |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108507548A CN108507548A (en) | 2018-09-07 |
| CN108507548B true CN108507548B (en) | 2020-08-07 |
Family
ID=63399512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810411036.7A Expired - Fee Related CN108507548B (en) | 2018-05-02 | 2018-05-02 | Measuring device and measuring method for geometrical morphology of submarine pits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108507548B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166673A (en) * | 2021-12-01 | 2022-03-11 | 福建工程学院 | Method for predicting rising displacement of seabed arc oscillation shearing damage soil body under wave action |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001116550A (en) * | 1999-10-15 | 2001-04-27 | Nishimatsu Constr Co Ltd | Water bottom ground depth measuring meter and depth measuring method |
| JP5800326B1 (en) * | 2015-02-18 | 2015-10-28 | 株式会社岡田建工 | Laser irradiation equipment installation stand |
| CN106885890B (en) * | 2017-01-09 | 2019-01-25 | 华侨大学 | A kind of Potential of Seabed Under Wave Loading soil body disaster formation simulator |
-
2018
- 2018-05-02 CN CN201810411036.7A patent/CN108507548B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN108507548A (en) | 2018-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2019100321A4 (en) | A multistage penetrating in-situ device and method to observe sand waves on the seabed based on resistivity probe | |
| CN109579802B (en) | Multistage injection type submarine sand wave in-situ observation device and method | |
| CN103144751B (en) | A kind of beach shallow sea sediment strength in situ detection device and method | |
| CN107063196B (en) | Seabed sand waves migration observation device and method based on pressure gauge | |
| CN113432648A (en) | System and method for long-term observation of seabed soft clay deformation and sliding induced by deep-sea internal waves | |
| CN107700458A (en) | Feeler inspection is flowed entirely with the pyriform base expanding and base expanding of Yu Haiyang ultra-soft soil in-situ test to pop one's head in | |
| CN106985973B (en) | A kind of sea area probing sand anchor cast anchor and the method that weighs anchor | |
| CN203078741U (en) | In-situ detection device of strength of beach and shallow sea sediments | |
| CN112049005A (en) | Underwater pier detection device | |
| CN108507548B (en) | Measuring device and measuring method for geometrical morphology of submarine pits | |
| CN107462891B (en) | Three-point type deep sea submerged buoy positioning method | |
| CN210294255U (en) | Soft soil field soil body parameter long distance continuous measuring device | |
| CN107747306A (en) | A kind of cross with Yu Haiyang ultra-soft soil in-situ test flows feeler inspection probe entirely | |
| CN105953971A (en) | Beach shallow sea pore water pressure in situ observation system based on vibratory liquefaction principle | |
| US4660184A (en) | Device for use in borehole-seismic measurements at sea | |
| CN109178203B (en) | Ship attitude calibration method for actual measurement of floating support installation | |
| CN111271513B (en) | Visualized positioning and guiding method for submarine cable management | |
| CN210294256U (en) | Continuous measuring device of soil body parameter in soft soil field on a large scale | |
| JP2004271326A (en) | Seabed behavior measurement system | |
| CN106980140A (en) | A kind of survey grid detected for submarine target magnetic method and its measuring method | |
| CN113562119B (en) | Device and method for measuring deep sea profile flow | |
| CN103410135B (en) | Riverbed level measurement method based on network drill rod detection | |
| CN212388353U (en) | Underwater pier detection device | |
| CN205691769U (en) | A kind of fixed haulage rod of side scan sonar | |
| CN211368838U (en) | Underwater milling groove guiding and positioning device suitable for deepwater embedded foundation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200807 |