Measuring device and method for short-term synchronous tidal level of beach shallow sea wind power plant site
Patent Information
- Application Number
- CN202510440076.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-10-16
AI Technical Summary
[0003](1)滩浅海潮间带的强风、潮流、波浪和船舶尾流对潮位的测量影响较大，潮位压力传感器记录真实潮位的同时，也叠加记录了波浪和船舶尾流的数据，还有潮流及强风对压力传感器的影响，导致实际潮位测量数据偏差较大
[0027] In summary, the beneficial technical effects of this invention are as follows: The short-term synchronous tide level measuring device and method for shallow sea wind farm sites provided in this application include a tide gauge barrel, a self-contained pressure sensor, and a laser rangefinder. The bottom of the tide gauge barrel is located on the seabed, and the top of the tide gauge barrel extends to the upper part of the horizontal plane. The top of the tide gauge barrel is fixedly connected to the bottom plate of the wharf through a connector. The self-contained pressure sensor is disposed on the inner peripheral wall near the bottom of the tide gauge barrel, and there is a preset distance between the bottom of the self-contained pressure sensor and the bottom of the tide gauge barrel. Multiple filter holes for filtering out fluctuations in the sea surface are provided on the outer peripheral wall near the bottom of the tide gauge barrel. Multiple filter holes are connected to the inner cavity of the tide gauge barrel; a laser rangefinder is located inside the tide gauge barrel, with its top connected to the inner top of the barrel; a self-contained pressure sensor is used to acquire tide level data; the laser rangefinder is used to measure changes in tide level in real time for verification and calibration with the tide level data from the self-contained pressure sensor; the measurement process is as follows: site selection - calibration - adjusting the flatness of the tide gauge barrel - data recording and collection - data checking - compiling the tide level curve - datum calculation; compared with traditional shallow sea tide level measurement devices, this device avoids the influence of strong winds, waves, currents, and ship wakes on tide level data, thus improving the accuracy of actual tide level measurement data.
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Figure CN122921113A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of marine surveying technology, and in particular to a measuring device and method for short-term synchronous tide level measurement at shallow sea wind farm sites. Background Technology
[0002] Currently, for multi-beam synchronous tide level measurement and single-beam synchronous tide level observation in geophysical surveys for new energy and oil and gas development in shallow waters, the high technical requirements and complex measurement environment of shallow waters present challenges. Therefore, it is necessary to address the difficulties in tide gauge measurement by adopting a vertical, hollow pipeline tide gauge system and its associated pressure sensor equipment and methods. Existing tide gauge methods involve direct suspension on the shore. Due to the influence of wind, waves, currents, and nearby vessels, the tide level pressure sensor acquires conventional tide level data superimposed with complex wave data due to the influence of strong winds, waves, coastal currents, and vessel wakes, severely affecting the data quality and analytical accuracy of tide level measurements. The following two problems exist in field applications:
[0003] (1) Strong winds, tides, waves and ship wakes in the intertidal zone of shallow seas have a significant impact on the measurement of tide levels. While the tide pressure sensor records the actual tide level, it also records the data of waves and ship wakes. In addition, the influence of tides and strong winds on the pressure sensor leads to a large deviation in the actual tide level measurement data.
[0004] (2) Conventional tide gauges use steel wire ropes or nylon ropes to tie the tide pressure sensor to the end, and then use counterweights to measure the tide data. The tide gauge is simple, and the steel wire rope or nylon rope is easily damaged and broken due to the repeated friction of waves and currents. This can lead to the loss of tide gauge equipment and data, affect the progress of multi-beam or single-beam survey operations, and increase the project operation cost. Summary of the Invention
[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a short-term synchronous tide level measurement device and method for shallow sea wind farm sites. Its advantages include avoiding the influence of strong winds, waves, currents, and ship wakes on tide level data, thus improving the accuracy of actual tide level measurements. Simultaneously, it effectively enhances the stability and reliability of synchronous tide level data acquisition during multibeam or single-beam water depth topography surveys in shallow seas, improves the technical level of multibeam or single-beam water depth topography tide level correction, increases project efficiency, and reduces project operating costs.
[0006] The above-mentioned objective of this invention is achieved through the following technical solution: Firstly, this invention provides a short-term synchronous tide level measuring device for shallow sea wind farm sites, comprising a tide gauge barrel, a self-contained pressure sensor, and a laser rangefinder. The bottom of the tide gauge barrel is located on the seabed, and the top of the tide gauge barrel extends to the upper part of the horizontal plane. The top of the tide gauge barrel is fixedly connected to the bottom plate of the wharf via a connector. The self-contained pressure sensor is disposed on the inner peripheral wall near the bottom of the tide gauge barrel, with a predetermined distance between the bottom of the self-contained pressure sensor and the bottom of the tide gauge barrel. Multiple filter holes for filtering out fluctuations in the sea surface are provided on the outer peripheral wall near the bottom of the tide gauge barrel, and all of the filter holes communicate with the inner cavity of the tide gauge barrel. The laser rangefinder is located inside the tide gauge barrel, and the top of the laser rangefinder is connected to the inner top of the tide gauge barrel. The self-contained pressure sensor is used to acquire tide level data. The laser rangefinder is used to measure changes in tide level in real time for verification and calibration with the tide level data from the self-contained pressure sensor.
[0007] Preferably, the short-term synchronous tide level measuring device for shallow sea wind farm sites provided by the present invention includes a tide gauge barrel comprising a barrel body and at least two counterweights. Both counterweights are disposed on the outer peripheral wall near the bottom end of the barrel body, and are arranged opposite to each other. The barrel body forms a cavity. A self-contained pressure sensor is located within the cavity and is disposed on the inner peripheral wall near the bottom end of the barrel body. The bottom end of the self-contained pressure sensor is spaced at a predetermined distance from the bottom end of the barrel body. Multiple filter holes are disposed on the outer peripheral wall near the bottom end of the barrel body and communicate with the cavity. A laser rangefinder is located within the cavity, and its top end is connected to the inner top of the barrel body.
[0008] Preferably, the measuring device for short-term synchronous tide level at shallow sea wind farm sites provided by the present invention has a barrel made of steel.
[0009] Preferably, the short-term synchronous tide level measuring device for shallow sea wind farm sites provided by the present invention includes a barrel body comprising an end cap and multiple cylindrical sections. The multiple cylindrical sections are sequentially threaded together to form a barrel unit, and the multiple cylindrical sections are sequentially connected to form the accommodating cavity. The end cap is placed on the top of the barrel unit and is sealed to the top of the barrel unit through a flange interface. Multiple filter holes are provided on the outer peripheral wall near the bottom of the barrel unit, and the multiple filter holes are all connected to the accommodating cavity.
[0010] Preferably, in the short-term synchronous tide level measuring device for shallow sea wind farm sites provided by the present invention, a scale is marked on the outer peripheral wall of the barrel, and the zero mark of the scale starts from the bottom of the self-contained pressure sensor; the scale is used to read the vertical distance from the self-contained pressure sensor to the elevation control point.
[0011] Preferably, in the short-term synchronous tide level measuring device for shallow sea wind farm sites provided by the present invention, the calculation formula for the aperture d of the filter orifice is as follows:
[0012] d = D / C
[0013] Where C is a constant with a value of 30; and D is the inner diameter of the barrel.
[0014] Preferably, in the short-term synchronous tide level measuring device for shallow sea wind farm sites provided by the present invention, the counterweight is made of lead.
[0015] Preferably, the short-term synchronous tide level measuring device for shallow sea wind farm sites provided by the present invention further includes a level, which is disposed at the top of the tide gauge barrel and is used to adjust the horizontality and verticality of the tide gauge barrel.
[0016] On the other hand, the present invention provides a method for measuring the short-term synchronous tide level of a shallow sea wind farm site as described above, comprising the following steps:
[0017] Select tide gauge points;
[0018] The data obtained by the laser rangefinder and the self-contained pressure sensor are compared and verified.
[0019] Adjust the levelness and verticality of the tide gauge barrel;
[0020] Tide level data is obtained by measuring the self-contained pressure sensor.
[0021] After the measurement is completed, remove the self-contained pressure sensor, download the tide level data, and check the quality of the tide level data;
[0022] Compile tidal level curves for synchronous tidal level measurements during multibeam or singlebeam bathymetric surveys;
[0023] The relationship between the local theoretical lowest tide level and the 1985 national elevation datum was calculated based on the tide level curve.
[0024] Preferably, in the measurement method of the short-term synchronous tide level measuring device for shallow sea wind farm sites provided by the present invention, the calculation formula for the water depth D1 of the 1985 National Height Datum is as follows:
[0025] D1 = H - h1
[0026] Where H is the instantaneous water depth value, obtained by single-beam or multi-beam measurement; h1 is the tidal level data.
[0027] In summary, the beneficial technical effects of this invention are as follows: The short-term synchronous tide level measuring device and method for shallow sea wind farm sites provided in this application include a tide gauge barrel, a self-contained pressure sensor, and a laser rangefinder. The bottom of the tide gauge barrel is located on the seabed, and the top of the tide gauge barrel extends to the upper part of the horizontal plane. The top of the tide gauge barrel is fixedly connected to the bottom plate of the wharf through a connector. The self-contained pressure sensor is disposed on the inner peripheral wall near the bottom of the tide gauge barrel, and there is a preset distance between the bottom of the self-contained pressure sensor and the bottom of the tide gauge barrel. Multiple filter holes for filtering out fluctuations in the sea surface are provided on the outer peripheral wall near the bottom of the tide gauge barrel. Multiple filter holes are connected to the inner cavity of the tide gauge barrel; a laser rangefinder is located inside the tide gauge barrel, with its top connected to the inner top of the barrel; a self-contained pressure sensor is used to acquire tide level data; the laser rangefinder is used to measure changes in tide level in real time for verification and calibration with the tide level data from the self-contained pressure sensor; the measurement process is as follows: site selection - calibration - adjusting the flatness of the tide gauge barrel - data recording and collection - data checking - compiling the tide level curve - datum calculation; compared with traditional shallow sea tide level measurement devices, this device avoids the influence of strong winds, waves, currents, and ship wakes on tide level data, thus improving the accuracy of actual tide level measurement data. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall structure of the short-term synchronous tide level measuring device for shallow sea wind farm sites provided in an embodiment of the present invention.
[0029] Figure 2 This is a schematic diagram of the connection structure between the tide gauge barrel and the counterweight in the short-term synchronous tide level measuring device for shallow sea wind farm sites provided in an embodiment of the present invention.
[0030] Figure 3 This is a cross-sectional view of the connection structure between two adjacent cylindrical sections in the short-term synchronous tide level measuring device for shallow sea wind farm sites provided in this embodiment of the invention.
[0031] Figure 4 This is a flowchart of a measurement method for a short-term synchronous tide level measuring device for shallow sea wind farm sites, provided in another embodiment of the present invention.
[0032] Figure 5 This is a schematic diagram of the reference surface conversion in the measurement method of the short-term synchronous tide level measurement device for shallow sea wind farm sites provided in the embodiments of the present invention.
[0033] In the diagram, 1 is the measuring device; 10 is the tide gauge barrel; 11 is the barrel body; 111 is the filter hole; 112 is the end cap; 113 is the barrel unit; 1131 is the first cylindrical part; 1132 is the second cylindrical part; 114 is the scale; 12 is the counterweight; 20 is the self-contained pressure sensor; 30 is the laser rangefinder; 40 is the level; 50 is the ground stake; and 60 is the first retaining ring. Detailed Implementation
[0034] The present invention will be further described in detail below with reference to the accompanying drawings.
[0035] Reference Figure 1 and Figure 2 This invention discloses a short-term synchronous tide level measuring device 1 for shallow sea wind farm sites, comprising a tide gauge 10, a self-contained pressure sensor 20, and a laser rangefinder 30. The bottom of the tide gauge 10 is located on the seabed, and the top of the tide gauge 10 extends to the upper part of the horizontal plane. The top of the tide gauge 10 is fixedly connected to the bottom plate of the wharf via a connector. The self-contained pressure sensor 20 is disposed on the inner peripheral wall near the bottom of the tide gauge 10, with a preset distance between the bottom of the self-contained pressure sensor 20 and the bottom of the tide gauge 10. Multiple laser rangefinders are disposed on the outer peripheral wall near the bottom of the tide gauge 10. A filter aperture 111 filters out fluctuations in the sea surface, and multiple filter apertures 111 are connected to the inner cavity of the tide gauge 10; a laser rangefinder 30 is located inside the tide gauge 10, and the top of the laser rangefinder 30 is connected to the inner top of the tide gauge 10; a self-contained pressure sensor 20 is used to acquire tide level data; the laser rangefinder 30 is used to measure changes in tide level in real time, so as to verify and check the tide level data with the self-contained pressure sensor 20; compared with traditional shallow sea tide level measurement devices, this device avoids the influence of strong winds, waves, currents and ship wakes on tide level data, thus improving the accuracy of actual tide level measurement data.
[0036] To eliminate the effects of strong winds, waves, currents, and ship wakes, a tide gauge 10 is installed near the shore or at the dock. The tide gauge 10 is fixed to the seabed, with its top higher than the water level of the dock or near the shore. A filter hole 111 is installed on the outer perimeter near the bottom of the tide gauge 10. The filter hole 111 communicates with the seawater outside the tide gauge 10, using a "small hole filter" method to filter out seawater fluctuations. The seawater outside the tide gauge 10 fluctuates under the influence of swells, and the "blocking" effect of the small hole... The sea surface inside the tide gauge 10 is almost unaffected, changing only with the tides to accurately record tidal variations. This setup effectively improves the stability and reliability of simultaneous tidal data acquisition during multibeam or singlebeam water depth topography surveys in shallow waters, enhancing the analytical accuracy of water depth topography tidal level correction. Simultaneously, it effectively completes water depth topography measurements and high-precision tide gauges, possessing both high efficiency and flexible operability. This can improve the quality of measurement data for new energy and oil and gas development in shallow waters, thereby increasing project operational efficiency.
[0037] It should be noted that the self-contained pressure sensor 20 and the laser rangefinder 30 are components well known to those skilled in the art, and their structures will not be described in detail here.
[0038] Specifically, the self-contained pressure sensor 20 and the laser rangefinder 30 are both located inside the tide gauge 10. The self-contained pressure sensor 20 is connected to the inner peripheral wall of the tide gauge 10 through the first retaining ring 60. The two first retaining rings 60 respectively bind the upper and lower ends of the self-contained pressure sensor 20 to the U-shaped bracket on the inner peripheral wall of the tide gauge 10.
[0039] Among them, such as Figure 2 As shown in this embodiment, three rows of filter holes 111 are provided on the outer peripheral wall near the bottom of the tide gauge 10. The three rows of filter holes 111 are spaced apart along the center line of the tide gauge 10. All three rows of filter holes 111 are located between the bottom of the self-contained pressure sensor 20 and the bottom of the tide gauge 10. This arrangement avoids affecting the measurement accuracy of the self-contained pressure sensor 20.
[0040] Specifically, the horizontal hole distance between two adjacent filter holes 111 in the horizontal direction ranges from 0.1m to 0.3m, and the vertical hole distance between two adjacent filter holes 111 in the vertical direction ranges from 0.1m to 0.3m. In this embodiment, the horizontal hole distance is 0.2m and the vertical hole distance is 0.2m.
[0041] In this embodiment, the self-contained pressure sensor 20 is a self-contained integrated pressure sensor. Before tide measurement, the sampling interval is set, generally recording tide level data once every 5 minutes. The self-contained pressure sensor 20 is arranged on the inner peripheral wall near the bottom of the tide gauge 10. The bottom of the self-contained pressure sensor 20 and the bottom of the tide gauge 10 (i.e., the seabed) are spaced at a preset distance, which ranges from 0.3m to 0.7m. In this embodiment, the preset distance is 0.5m.
[0042] For example, the connector can be a ground spike 50, or it can be a steel wire rope. In the possible implementation of the connector using a ground spike 50, one end of the ground spike 50 is inserted into the bottom plate of the dock, and the other end of the ground spike 50 is connected to a second retaining ring tied to the top of the tide gauge 10. By setting the ground spike 50, the ground spike 50 is used to fix the top position of the tide gauge 10.
[0043] Furthermore, in this embodiment, the tide gauge 10 includes a barrel body 11 and at least two counterweights 12. Both counterweights 12 are disposed on the outer peripheral wall near the bottom end of the barrel body 11, and the two counterweights 12 are arranged opposite to each other. The barrel body 11 forms a cavity. A self-contained pressure sensor 20 is located in the cavity and is disposed on the inner peripheral wall near the bottom end of the barrel body 11. The bottom end of the self-contained pressure sensor 20 is spaced apart from the bottom end of the barrel body 11 by a preset distance. Multiple filter holes 111 are disposed on the outer peripheral wall near the bottom end of the barrel body 11, and the multiple filter holes 111 are connected to the cavity. A laser rangefinder 30 is located in the cavity, and the top end of the laser rangefinder 30 is connected to the inner top of the barrel body 11.
[0044] For example, the counterweight 12 can be made of lead, or of course, it can be made of iron.
[0045] The weight of the counterweight 12 ranges from 18kg to 22kg. In this embodiment, the weight of the counterweight 12 is 20kg. The counterweight 12 is in the shape of a ring. The counterweight 12 is fixed to the outside of the bottom of the barrel 11 and is fastened to the barrel 11 with a third retaining ring. The counterweight 12 is used to fix the bottom of the barrel 11.
[0046] Among them, the length of barrel 11 is greater than 8m and the diameter is greater than 0.6m.
[0047] For example, the barrel body 11 can be made of steel. Of course, the barrel body 11 can also be made of iron.
[0048] Specifically, the bottom of the barrel 11 is fixed to the seabed surface by a counterweight 12, the top of the barrel 11 extends to the upper part of the horizontal plane, the top of the barrel 11 is 1m above the highest tide level, the wall thickness of the barrel 11 is greater than 1.0cm, and the inner wall is smooth.
[0049] It should be noted that the barrel body 11 must be vertical, sturdy, and safe.
[0050] The formula for calculating the aperture d of filter hole 111 is as follows:
[0051] d=D / C (1)
[0052] In equation (1), C is a constant with a value of 30; D is the inner diameter of barrel 11.
[0053] In this embodiment, the aperture d of the filter hole 111 is 0.02m.
[0054] Furthermore, in this embodiment, the barrel body 11 includes an end cap 112 and multiple cylindrical portions. The multiple cylindrical portions are sequentially threaded together to form a barrel unit 113. The multiple cylindrical portions are sequentially connected to form an accommodating cavity. The end cap 112 is placed on the top of the barrel unit 113. The end cap 112 is sealed to the top of the barrel unit 113 through a flange interface. Multiple filter holes 111 are provided on the outer peripheral wall near the bottom of the barrel unit 113. The multiple filter holes 111 are all connected to the accommodating cavity.
[0055] Specifically, the top of the laser rangefinder 30 is fixedly connected to the bottom surface of the end cap 112.
[0056] like Figure 3 As shown, two adjacent cylindrical portions include a first cylindrical portion 1131 and a second cylindrical portion 1132. An internal thread is provided on the inner peripheral wall near the top end of the first cylindrical portion 1131, and an external thread adapted to the internal thread is provided on the outer peripheral wall near the bottom end of the second cylindrical portion 1132. The bottom end of the second cylindrical portion 1132 is screwed into the top end of the first cylindrical portion 1131. The first cylindrical portion 1131 and the second cylindrical portion 1132 are threadedly connected and communicate with each other.
[0057] In this embodiment, the number of cylindrical sections is 4. Of course, the number of cylindrical sections can also be 5 or 6.
[0058] The length of each cylindrical section ranges from 1.2m to 1.7m. In this embodiment, the length of each cylindrical section is 1.5m. Each pair of adjacent cylindrical sections is connected by threads. The top of the uppermost cylindrical section is sealed to the end cap 112 via a flange interface. Three rows of filter holes 111 are provided on the outer peripheral wall of the lowermost cylindrical section near its bottom end. The counterweight 12 is disposed on the outer side of the bottom of the lowermost cylindrical section. The self-contained pressure sensor 20 is disposed on the inner peripheral wall of the lowermost cylindrical section near its bottom.
[0059] Furthermore, in this embodiment, a scale 114 is marked on the outer peripheral wall of the barrel 11, and the zero mark of the scale 114 starts from the bottom of the self-contained pressure sensor 20; the scale 114 is used to read the vertical distance from the self-contained pressure sensor 20 to the elevation control point.
[0060] In this embodiment, there are two scales 114. Scales 114 are marked on opposite sides of the outer periphery of the barrel 11. The scales 114 are marked in red on the outer periphery of the barrel 11 according to the graduation rules of a meter stick. This arrangement facilitates clear reading. The zero mark of the scales 114 starts from the bottom of the self-contained pressure sensor 20 and is marked on the outer periphery of each cylindrical section according to its length. This is used to read the vertical distance from the self-contained pressure sensor 20 to the elevation control point, which facilitates the calculation of the relationship between the local theoretical lowest tide level and the 1985 National Elevation Datum.
[0061] Furthermore, the short-term synchronous tide level measuring device 1 for shallow sea wind farm sites provided in this embodiment also includes a level 40. The level 40 is set at the top of the tide gauge 10. The level 40 is used to adjust the horizontality and verticality of the tide gauge 10 to ensure the horizontality and verticality of the self-contained pressure sensor 20.
[0062] Specifically, the level 40 is installed on the outside of the barrel 11 and at the top of the end cap 112. The level 40 is fixed to the end cap 112 by a fourth retaining ring.
[0063] The top of the laser rangefinder 30 is mounted on the transverse liner inside the end cover 112.
[0064] Continue to refer to Figure 4 and Figure 5 Another embodiment provides a method for measuring the short-term synchronous tide level of a shallow sea wind farm site as described above using the measuring device 1, comprising the following steps:
[0065] S1. Select a tide gauge point.
[0066] It should be noted that the seabed surface of the selected tide gauge point must be flat and free from erosion.
[0067] Specifically, select a station located near the survey area, preferably close to the main tidal zone. Select a flat seabed on the nautical chart, or obtain a flat seabed by using multibeam bathymetry to scan the water depth and topography of the tide gauge point, as the location for setting up the tide gauge barrel 10.
[0068] S2. Compare and verify the data obtained by using the laser rangefinder 30 and the self-contained pressure sensor 20.
[0069] Specifically, before starting tide level observation, the data measured by the laser rangefinder 30 and the self-contained pressure sensor 20 are compared and verified to ensure the accuracy of the tide level data measured by the self-contained pressure sensor 20.
[0070] S3. Adjust the horizontal and vertical alignment of the tide gauge 10.
[0071] Specifically, the level and verticality of the tide gauge 10 are adjusted using a level 40.
[0072] S4. Tide level data is obtained by measuring the self-contained pressure sensor 20.
[0073] Specifically, the sampling interval of the self-contained pressure sensor 20 was set before the tide gauge test. The self-contained pressure sensor 20 recorded the tide level data once every 5 minutes and stored the measurement data in a self-contained manner.
[0074] S5. After the measurement is completed, remove the self-contained pressure sensor 20, download the tide level data, and check the quality of the tide level data.
[0075] Specifically, after completing the water depth and topography measurement task using multibeam or single beam, the self-contained pressure sensor 20 is removed, the tide level data is downloaded, and the quality of the tide level data is checked.
[0076] After obtaining tide level data by measuring the self-contained pressure sensor 20 in S4, and before removing the self-contained pressure sensor 20, downloading the tide level data, and checking the quality of the tide level data in S5, the following measures are also taken: when establishing a short-term synchronous tide gauge station, the geographical and environmental conditions of the station are considered, and the safety of the tide gauge barrel 10 is ensured by having a dedicated person to guard it.
[0077] S6. Compile tidal curves for synchronous tidal measurements during water depth and topography surveys using multibeam or single beam methods.
[0078] S7. Calculate the relationship between the local theoretical lowest tide level and the 1985 National Elevation Datum based on the tide level curve.
[0079] Furthermore, in this embodiment, the formula for calculating the water depth D1 of the 1985 National Elevation Datum is as follows:
[0080] D1 = H - h1(2)
[0081] In equation (2), H is the instantaneous water depth value, which is obtained by single-beam or multi-beam measurement; h1 is the tidal level data.
[0082] It should be noted that the instantaneous water depth is the water depth at sea level fluctuations.
[0083] The formula for calculating the water depth D2 of the local theoretical lowest tide level is as follows:
[0084] D2=D1+h2(3)
[0085] In equation (3), D1 is the water depth of the 1985 National Elevation Datum; h2 is the difference between the local theoretical lowest tide level and the 1985 National Elevation Datum.
[0086] This application provides a short-term synchronous tide level measuring device 1 and a measuring method for shallow sea wind farm sites. The measuring device 1 includes a tide gauge 10, a self-contained pressure sensor 20, and a laser rangefinder 30. The bottom of the tide gauge 10 is located on the seabed, and the top of the tide gauge 10 extends to the upper part of the horizontal plane. The top of the tide gauge 10 is fixedly connected to the bottom plate of the wharf via a connector. The self-contained pressure sensor 20 is disposed on the inner peripheral wall near the bottom of the tide gauge 10, with a preset distance between the bottom of the self-contained pressure sensor 20 and the bottom of the tide gauge 10. Multiple filter holes 111 are provided on the outer peripheral wall near the bottom of the tide gauge 10 to filter out fluctuations in the sea surface. All 111 are connected to the inner cavity of the tide gauge 10; the laser rangefinder 30 is located inside the tide gauge 10, and the top of the laser rangefinder 30 is connected to the inner top of the tide gauge 10; the self-contained pressure sensor 20 is used to acquire tide level data; the laser rangefinder 30 is used to measure the changes in tide level in real time, so as to verify and check the tide level data with the self-contained pressure sensor 20; the measurement process is as follows: site selection - calibration - adjusting the flatness of the tide gauge 10 - data recording and collection - data checking - compiling the tide level curve - datum calculation; compared with the traditional shallow sea tide level measurement device, it avoids the influence of strong winds, waves, currents and ship wakes on the tide level data, and improves the accuracy of the actual tide level measurement data.
[0087] The device 1 for short-term synchronous tide level measurement at shallow sea wind farm sites provided by the present invention has the following advantages: the device has a simple structure, is easy to manufacture, and is easy to operate.
[0088] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0089] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.
Claims
1. A device for short-term synchronous tide level measurement at shallow sea wind farm sites, characterized in that: Includes a tide gauge, a self-contained pressure sensor, and a laser rangefinder; The bottom of the tide gauge barrel is located on the seabed, and the top of the tide gauge barrel extends to the upper part of the horizontal plane. The top of the tide gauge barrel is fixedly connected to the bottom plate of the dock through a connector. The self-contained pressure sensor is set on the inner peripheral wall near the bottom of the tide gauge barrel. The bottom of the self-contained pressure sensor is spaced at a preset distance from the bottom of the tide gauge barrel. Multiple filter holes for filtering out the fluctuations of the sea surface are provided on the outer peripheral wall near the bottom of the tide gauge barrel. All of the multiple filter holes are connected to the inner cavity of the tide gauge barrel. The laser rangefinder is located inside the tide gauge barrel, and the top of the laser rangefinder is connected to the inner top of the tide gauge barrel. The self-contained pressure sensor is used to acquire tide level data; the laser rangefinder is used to measure the changes in tide level in real time, so as to verify and check the tide level data with the self-contained pressure sensor.
2. The short-term synchronous tide level measuring device for shallow sea wind farm sites according to claim 1, characterized in that: The tide gauge includes a barrel body and at least two counterweights. The two counterweights are disposed on the outer peripheral wall near the bottom end of the barrel body and are arranged opposite to each other. The barrel body forms a cavity. The self-contained pressure sensor is located in the cavity and is disposed on the inner peripheral wall near the bottom end of the barrel body. The bottom end of the self-contained pressure sensor is spaced at a predetermined distance from the bottom end of the barrel body. A plurality of filter holes are disposed on the outer peripheral wall near the bottom end of the barrel body and are connected to the cavity. The laser rangefinder is located inside the accommodating cavity, and the top of the laser rangefinder is connected to the inner top of the barrel.
3. The short-term synchronous tide level measuring device for shallow sea wind farm sites according to claim 2, characterized in that: The barrel body is made of steel.
4. The short-term synchronous tide level measuring device for shallow sea wind farm sites according to any one of claims 2-3, characterized in that: The barrel body includes an end cap and multiple cylindrical sections. The multiple cylindrical sections are sequentially threaded together to form a barrel unit. The multiple cylindrical sections are sequentially connected to form the accommodating cavity. The end cap is placed on the top of the barrel unit and is sealed to the top of the barrel unit through a flange interface. Multiple filter holes are provided on the outer peripheral wall near the bottom of the barrel unit, and the multiple filter holes are all connected to the accommodating cavity.
5. The short-term synchronous tide level measuring device for shallow sea wind farm sites according to claim 2, characterized in that: A scale is marked on the outer peripheral wall of the barrel, and the zero mark of the scale starts from the bottom of the self-contained pressure sensor. The scale is used to read the vertical distance from the self-contained pressure sensor to the elevation control point.
6. The short-term synchronous tide level measuring device for shallow sea wind farm sites according to claim 2, characterized in that: The formula for calculating the aperture diameter d of the filter hole is: d = D / C Where C is a constant with a value of 30; and D is the inner diameter of the barrel.
7. The short-term synchronous tide level measuring device for shallow sea wind farm sites according to claim 2, characterized in that: The counterweight is made of lead.
8. The short-term synchronous tide level measuring device for shallow sea wind farm sites according to claim 1, characterized in that: It also includes a level, which is set at the top of the tide gauge barrel and is used to adjust the horizontality and verticality of the tide gauge barrel.
9. A method for measuring short-term synchronous tide levels at shallow sea wind farm sites as described in any one of claims 1 to 8, characterized in that: Includes the following steps: Select tide gauge points; The data obtained by the laser rangefinder and the self-contained pressure sensor are compared and verified. Adjust the levelness and verticality of the tide gauge barrel; Tide level data is obtained by measuring the self-contained pressure sensor. After the measurement is completed, remove the self-contained pressure sensor, download the tide level data, and check the quality of the tide level data; Compile tidal level curves for synchronous tidal level measurements during multibeam or singlebeam bathymetric surveys; The relationship between the local theoretical lowest tide level and the 1985 national elevation datum was calculated based on the tide level curve.
10. The measurement method of the short-term synchronous tide level measuring device for shallow sea wind farm sites according to claim 9, characterized in that: The formula for calculating the water depth D1 in the 1985 National Height Datum is as follows: D1 = H - h1 Where H is the instantaneous water depth value, obtained by single-beam or multi-beam measurement; h1 is the tidal level data.