Small buoy wave observation instrument verification method based on large-scale wave water tank

Abstract

The invention relates to the technical field of port navigation channel engineering, and discloses a small buoy wave observation instrument verification method based on a large-scale wave water tank, which comprises the following steps of: hoisting a small buoy observation instrument into the large-scale wave water tank by determining a wave height verification point, a wave period verification point and a flow velocity verification point; an anchor system of the small buoy observation instrument is fixed to the bottom of the large-scale wave water tank, monitoring equipment is arranged at the position corresponding to the large-scale wave water tank, flow generation parameters of the flow velocity verification point are input into a flow generation system of the large-scale wave water tank, and the flow generation system is started; when the flow velocity of the water flow reaches the flow velocity of the flow velocity verification point, corresponding wave making parameters are input into a wave making system of the large-scale wave water tank, and the wave making system is started to simulate waves; according to the method, the wave data of the monitoring equipment in the preset acquisition time period are synchronously collected, the wave characteristic value of each verification point is calculated, and whether the small buoy observation instrument is qualified or not is judged in combination with the expected standard, so that the verification reliability and accuracy of the small buoy wave observation instrument are improved.

Description

Technical Field

[0001] The invention relates to the technical field of port and waterway engineering, and in particular to a calibration method for a small buoy wave observation instrument based on a large-scale wave flume. Background Art

[0002] Wave buoys are buoy systems used to measure wave height, period, and wave direction. They are widely used in the fields of marine engineering and water transport engineering, and are important instruments and equipment in the field of marine engineering and water transport engineering monitoring. Small marine environment monitoring buoys are disc-shaped devices with a diameter of no more than 3 meters. They can carry a variety of sensors or instruments and equipment for fixed-point, automatic, long-term and continuous collection, processing, storage and transmission of conventional hydrological and meteorological data. Small marine environment monitoring buoys are composed of buoy bodies and anchor systems, buoy collection and transmission systems, communication transmission systems, and buoy detectors; the power supply system is composed of solar panels and maintenance-free batteries; the receiving shore station is composed of satellite communication machine PRS / CDMA receiving modules and data processing computers. Commonly used wave buoys are based on acceleration sensors. Their wave measurement method is that when measuring waves, the buoy moves accordingly with the changes in the sea surface, which represents the motion state of water particles, and the result is calculated and output as an acceleration signal. The discrete acceleration signal is acquired by the acquisition circuit, that is, a series of vertical acceleration values ​​are acquired at a certain sampling rate to obtain data such as wave height, wave period, and power spectrum.

[0003] In the prior art, various types of indoor detection devices have been developed to calibrate wave buoys in laboratories. Most laboratory calibration methods use mechanical devices to simulate simple fluctuations (sine waves) of water particles in the ocean, such as rubber rope method or spring system calibration, pendulum calibration, vertical lifting sine simulation calibration and rotating sine simulation calibration. Actual ocean waves are extremely complex in form, with extremely irregular waveforms and uncertain propagation directions. The ideal sinusoidal motion in the laboratory cannot fully simulate the complex waveforms and changes in propagation directions under actual sea conditions. In addition, these methods do not consider the influence of the combined effects of waves and currents under real sea conditions, nor do they install wave measuring sensors and power supply systems inside the floating body and equip the corresponding anchoring system on the outside for accuracy testing. Therefore, it is very necessary to use a large-scale wave test tank that can simulate real sea conditions to carry out the calibration of small buoy wave observation instruments.

[0004] Therefore, there is an urgent need for a calibration method for a small buoy wave observation instrument based on a large-scale wave tank to improve the reliability and accuracy of the calibration of the small buoy wave observation instrument. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a calibration method for a small buoy wave observation instrument based on a large-scale wave tank. By conducting simulation experiments in a large-scale wave tank, the actual ocean environment can be simulated to improve the efficiency and accuracy of the calibration.

[0006] The present invention provides a calibration method for a small buoy wave observation instrument based on a large-scale wave tank, comprising the following steps: S1. Determine the wave height verification point, wave period verification point and flow velocity verification point; S2. According to the wave height verification point, hoist the small buoy observation instrument into the large-scale wave tank, and fix the anchor of the small buoy observation instrument to the bottom of the large-scale wave tank; S3. According to the position of the small buoy observation instrument, a monitoring device is arranged at the corresponding large-scale wave tank position; the monitoring device includes a high-speed camera, a high-precision video wave height meter and a current meter; S4, inputting the flow parameters of the flow velocity verification point into the flow generation system of the large-scale wave flume, and starting the flow generation system; S5. When the water flow velocity reaches the velocity at the velocity verification point, the corresponding wave making parameters are input into the wave making system of the large-scale wave flume according to the determined wave height verification point and wave period verification point, and the wave making system is started to simulate waves; S6. synchronously collect wave data of monitoring equipment within a preset collection period; S7, calculating the wave characteristic value of each verification point according to the wave data; S8. Determine whether the small buoy observation instrument is qualified based on the wave characteristic values ​​and expected standards.

[0007] In some embodiments, the wave height detection points include regular wave height detection points and irregular wave height detection points, wherein: The wave height verification points of the regular waves are 1.00m, 2.00m, and 3.00m; The wave height verification points of the irregular waves are 0.80m, 1.60m and 2.40m.

[0008] In some embodiments, the selection of the wave period verification point at each wave height verification point is determined in the following manner: Set 5 wave period verification points at each regular wave height verification point; Three wave period verification points are set at each wave height verification point of the irregular wave.

[0009] In some embodiments, the formula for selecting the calibration points for each wave period is: ; Where: Indicates the value of the ith wave cycle test point corresponding to the wave height test point; Indicates the maximum value of the wave period range corresponding to each wave height detection point; Indicates the minimum value of the wave period range corresponding to each wave height detection point.

[0010] In some embodiments, the maximum value of the wave period range corresponding to each wave height detection point and the minimum value of the wave period range corresponding to each wave height detection point are calculated as: The maximum value of the wave period range corresponding to each wave height detection point When it is greater than 10 s, = 10 s; The minimum value of the wave period range corresponding to each wave height detection point ;in, It indicates the height of the wave height verification point; g indicates the value of gravitational acceleration.

[0011] In some embodiments, the flow velocity calibration points are 0.08 m / s, 0.16 m / s, and 0.24 m / s.

[0012] In some embodiments, the S6 further comprises: When the preset collection period has not ended, but wave data of 100 complete wave numbers have been collected, the operation of the large-scale wave tank is terminated.

[0013] In some embodiments, the wave includes: wave height data, wave period data, flow velocity data, and waveform data; The wave characteristic values ​​include: average wave height, significant wave height, 1% wave height, maximum wave height, average wave period, significant wave period, spectrum peak period, total energy of wave energy spectrum and spectrum peak energy of wave energy spectrum.

[0014] In some embodiments, the S8 specifically includes: Calculate the error between the wave characteristic value and the expected standard; Set the error threshold for each wave feature; If all error values ​​are less than or equal to the error threshold, the small buoy observation instrument is judged to be qualified; If any error value is greater than the error threshold, the small buoy observation instrument is judged to be unqualified.

[0015] The embodiments of the present invention have the following technical effects: 1. By using a large-scale wave tank to simulate wave conditions close to the real ocean environment, the complex waveforms and propagation direction changes under actual sea conditions can be reproduced more accurately, thereby improving the accuracy of calibration.

[0016] 2. During the calibration process, not only the wave characteristics are taken into consideration, but also the influence of water flow velocity on the buoy performance. By determining the wave height calibration points, wave period calibration points and flow velocity calibration points, the small buoy observation instrument is hoisted into the large-scale wave tank and the anchor is fixed to ensure the reliability and stability of the buoy under various complex sea conditions.

[0017] 3. By assembling wave measuring sensors, power supply systems, etc. inside the buoy and equipping the corresponding anchoring system on the periphery, a comprehensive system integration test was carried out to ensure the overall performance of the buoy in actual application.

[0018] 4. By using advanced equipment such as high-speed cameras, high-precision video wave height meters and current meters, wave data is collected synchronously and detailed wave characteristic values ​​are calculated, providing a scientific basis for the performance evaluation of the buoy.

[0019] 5. By setting a reasonable error threshold, it ensures that the buoy can meet the expected standards under various conditions, thereby improving the credibility of the buoy measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a flow chart of a calibration method of a small buoy wave observation instrument based on a large-scale wave tank provided by an embodiment of the present invention; Figure 2 It is a layout diagram of a large-scale wave tank test tank provided by an embodiment of the present invention; Figure 3 This is a layout diagram of a small buoy wave observation instrument provided by an embodiment of the present invention in a large-scale wave tank. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0023] The small buoy wave observation instrument is a widely used monitoring instrument in the field of marine engineering and water transport engineering, with obvious industry characteristics. Waves are one of the six key elements of marine hydrological observation. Due to the limitations of historical conditions and technical levels, the existing technologies include rubber rope systems, pulley rope systems, pendulum calibration systems, vertical lifting systems, lever knocking systems, etc., which are recognized as rotating sine simulation correction systems. The above systems all use indoor mechanical devices to simulate the simple fluctuations (sine waves) of water particles in the ocean. The actual waves are irregular random waves, and are accompanied by ocean currents, so it is impossible to use indoor mechanical devices to simulate the actual sea conditions. In addition, the sensors and power supply systems are not installed inside the floating body and the corresponding anchor system is not equipped outside to consider the conditions of wave and current combined action for accuracy detection, and there is a lack of verification of the actual measurement accuracy of the buoy. The accuracy and traceability of wave data information have become hidden dangers during use. Through the large-scale prototype wave tank to restore the actual sea conditions, simulate random waves and currents, conduct comparative tests on small wave buoy detectors, and conduct metrological calibration, which provides a reference for the metrological calibration of small buoy observation instruments and improves the measurement accuracy of small buoy observation instruments.

[0024] Before calibrating the small buoy wave observation instrument based on a large-scale wave tank, an appearance inspection should be carried out first. Use visual and manual methods to carefully check the appearance of the small buoy observation instrument. This step is crucial because it can intuitively reflect whether the instrument has suffered obvious collisions or scratches. At the same time, check the structural components of the small buoy observation instrument to ensure that their mechanical connections are firm and there is no looseness or deformation. If the instrument is found to be unqualified during the appearance inspection, such as obvious collision marks, scratches, or loose mechanical connections of structural components, the calibration should be stopped immediately and the instrument should be judged to be unqualified. It should be noted that although the subsequent calibration and inspection during use allow the instrument to have appearance defects that do not affect the measurement performance, these defects should not affect the normal use and accuracy of the instrument. Then, the instrument is powered on for inspection. If the instrument does not meet the requirements during the power-on inspection, such as failure to start, abnormal display, or unstable performance, the calibration should be stopped immediately and the instrument should be judged to be unqualified.

[0025] Figure 1 is a flow chart of a calibration method for a small buoy wave observation instrument based on a large-scale wave tank provided by an embodiment of the present invention, see Figure 1 .

[0026] The present invention provides a calibration method for a small buoy wave observation instrument based on a large-scale wave tank, comprising the following steps: S1. Determine the wave height verification point, wave period verification point and flow velocity verification point; In some embodiments, the wave height verification points include wave height verification points for regular waves and wave height verification points for irregular waves, wherein the wave height verification points for regular waves are 1.00m, 2.00m, and 3.00m; and the wave height verification points for irregular waves are 0.80m, 1.60m, and 2.40m.

[0027] In some embodiments, the selection of the wave period calibration point at each wave height calibration point is determined in the following manner: 5 wave period calibration points are set at each regular wave height calibration point; and 3 wave period calibration points are set at each irregular wave height calibration point.

[0028] In some embodiments, the formula for selecting the calibration points for each wave period is: ; Where: Indicates the value of the ith wave cycle test point corresponding to the wave height test point; Indicates the maximum value of the wave period range corresponding to each wave height detection point; Indicates the minimum value of the wave period range corresponding to each wave height detection point.

[0029] In some embodiments, the maximum value of the wave period range corresponding to each wave height detection point and the minimum value of the wave period range corresponding to each wave height detection point are calculated as: The maximum value of the wave period range corresponding to each wave height detection point When it is greater than 10 s, = 10 s; the minimum value of the wave period range corresponding to each wave height detection point ;in, It indicates the height of the wave height verification point; g indicates the value of gravitational acceleration.

[0030] For example, g is 9.8 m / s 2 When , the above formula is used to calculate: The minimum value of the wave period range corresponding to each wave height detection point of the regular wave is: =1.00m, =2.6s; when =2.00m, =3.7s; when =3.00m, =4.5s.

[0031] The minimum value of the wave period range corresponding to each wave height detection point of the irregular wave is: =0.80m, =2.3s; when =1.60m, =3.3s; when =2.40m, =4.0s.

[0032] In some embodiments, the flow velocity calibration points are 0.08 m / s, 0.16 m / s, and 0.24 m / s.

[0033] S2. According to the wave height calibration point, hoist the small buoy observation instrument into the large-scale wave tank, and fix the anchor of the small buoy observation instrument to the bottom of the large-scale wave tank; ensure the safety and stability of the instrument during the installation process, and check whether the instrument function module can be used normally, such as Figure 3 shown.

[0034] S3. According to the position of the small buoy observation instrument, monitoring equipment is arranged at the corresponding large-scale wave tank position; the monitoring equipment includes a high-speed camera, a high-precision video wave height meter and a current meter; the high-speed camera is used to monitor the movement of the buoy in real time and capture the dynamic response of the buoy under the action of waves; the high-precision video wave height meter uses video image analysis technology to accurately measure parameters such as wave height and period; the current meter measures the water flow velocity in the tank and provides flow velocity data for the calibration of the buoy observation instrument.

[0035] S4, inputting the flow parameters of the flow velocity verification point into the flow generation system of the large-scale wave flume, and starting the flow generation system; Specifically, according to the specific values ​​of the flow velocity calibration points, for each flow velocity calibration point, the corresponding flow making parameters are input into the flow making system of the large-scale wave flume. The flow making parameters usually include water flow velocity, water flow direction, water flow duration, etc.

[0036] S5. When the water flow velocity reaches the velocity at the velocity verification point, the corresponding wave making parameters are input into the wave making system of the large-scale wave flume according to the determined wave height verification point and wave period verification point, and the wave making system is started to simulate waves; The wave-making parameters include but are not limited to: wave height verification point, wave period verification point, water depth in front of the board, number of waves, etc.

[0037] S6. Synchronously collect wave data of the monitoring equipment within a preset collection period; the wave data includes: wave height data, wave period data, flow velocity data and waveform data; It is worth noting that different small-scale buoy observation instruments have different preset collection periods, and the operation time of the large-scale wave and current flume should not be less than the preset collection period.

[0038] Furthermore, when the preset collection period has not ended, but wave data of 100 complete wave numbers have been collected, the operation of the large-scale wave tank is terminated.

[0039] S7. Calculate the wave characteristic values ​​of each calibration point according to the wave data; the wave characteristic values ​​include: average wave height, effective wave height, 1% wave height, maximum wave height, average wave period, effective wave period, spectrum peak period, total energy of wave energy spectrum and spectrum peak energy of wave energy spectrum.

[0040] S8. Judging whether the small buoy observation instrument is qualified according to the wave characteristic value and the expected standard, specifically including: Calculate the error between the wave characteristic value and the expected standard; Set the error threshold for each wave feature; If all error values ​​are less than or equal to the error threshold, the small buoy observation instrument is judged to be qualified; If any error value is greater than the error threshold, the small buoy observation instrument is judged to be unqualified.

[0041] In some embodiments, the error between the wave characteristic value and the expected standard is calculated as follows: 1. The calculation formula for the error value of the average wave height is: ;in, Indicates the error value of the average wave height of regular waves; It represents the average wave height value measured by the regular wave small buoy observation instrument; Represents the standard wave height value simulated by a large-scale wave tank.

[0042] 2. The calculation formula for the error value of effective wave height is: ;in, Indicates the error value of the effective wave height of irregular waves; It represents the effective wave height value measured by the irregular wave small buoy observation instrument; Represents the standard significant wave height value simulated by a large-scale wave tank.

[0043] 3. The calculation formula for the error value of 1% wave height is: ;in, It indicates the error value of the 1% wave height of irregular waves; It represents the 1% wave height value measured by the irregular wave small buoy observation instrument; It represents the standard 1% wave height value simulated by a large-scale wave tank.

[0044] 4. The calculation formula for the error value of the maximum wave height is: ;in, Indicates the error value of the maximum wave height of irregular waves; It represents the maximum wave height value measured by the irregular wave small buoy observation instrument; Represents the standard maximum wave height value simulated by a large-scale wave and flow flume.

[0045] 5. The calculation formula of the error value of the average wave period is: ;in, Indicates the error value of the average wave height of regular waves; It represents the average wave height value measured by the regular wave small buoy observation instrument; Represents the standard wave period value simulated by a large-scale wave flow flume.

[0046] 6. The calculation formula of the error value of the effective wave period is: ;in, Indicates the error value of the effective wave period of the irregular wave; It represents the effective wave period value measured by the irregular small wave float observation instrument; Represents the standard effective wave period value of large-scale wave and flow flume simulation.

[0047] The error calculation formula of the spectrum peak period is: ;in, Indicates the error value of the irregular spectrum peak period; It represents the spectrum peak period value measured by the irregular wave small buoy observation instrument; Represents the standard spectrum peak period value of large-scale wave flow flume simulation.

[0048] 7. During the verification process, the collected signal data is analyzed by computer and the error value of the total energy of the wave energy spectrum is verified. The calculation formula is: ; In the formula, Indicates the error value of the total energy indication of the irregular wave energy spectrum; It represents the total energy value of the wave energy spectrum measured by the irregular wave small buoy observation instrument; Represents the total energy value of the standard wave energy spectrum simulated by a large-scale wave and flow flume.

[0049] 8. The error value verification of the wave energy spectrum peak energy and the error value verification of the wave energy spectrum total energy are carried out simultaneously. The calculation formula is: ;in, Indicates the error value of the peak energy indication of the irregular wave energy spectrum; It represents the peak energy value of the wave energy spectrum measured by the regular wave buoy; Represents the peak energy value of the standard wave energy spectrum simulated by a large-scale wave flow flume.

[0050] like Figure 2As shown in the figure, the large-scale wave tank is 456 m long, 5 m wide, and 12 m deep in the test section. The maximum wave-making capacity is 3.5 m for regular waves, and the effective wave-making period is 2-10s. The bidirectional flow field simulation system of 4 axial flow pumps can simulate ocean waves close to the prototype, and is equipped with instruments for accurately measuring the undulation of the wave surface. Prototype ocean wave comparison tests have been carried out on SBF6-1 ocean buoys and SBF3-2 ocean buoys in this large-scale wave tank. The test results show that under the action of regular waves, the error value of the wave height of the tested ocean buoy is as high as 15%, and under the action of irregular waves, the error value of the wave height of the tested ocean buoy is as high as 18%. The difference in wave energy density at the peak frequency of the spectrum is significantly as high as 30%. Under the same working conditions, when the water flow velocity increases, the relative error value increases accordingly. From the actual sea condition comparison test, we can see that the actual measurement accuracy of ocean buoys is affected by factors such as wave characteristics, current size, and whether they are equipped with anchors. Therefore, it is very necessary to use a large-scale wave tank that can simulate real sea conditions to calibrate small buoy wave observation instruments.

[0051] This application simulates the actual wave environment in a large-scale wave tank to calibrate the small wave buoy observation instrument, thus solving the accuracy problem caused by environmental differences that may exist in traditional calibration methods. This application not only takes into account the wave height and wave period of regular waves, but also takes into account the situation of irregular waves, and gives specific calibration point values, which increases the comprehensiveness and accuracy of the calibration. By setting specific flow velocity calibration points, the performance of the observation instrument under different flow velocity conditions can be further verified. Using a variety of equipment such as high-speed cameras, high-precision video wave height meters and flow meters, comprehensive collection and analysis of wave data can be achieved, improving the accuracy and reliability of the calibration. By calculating multiple wave characteristic values ​​such as average wave height and effective wave height, and comparing them with the expected standards, the qualification of the observation instrument can be judged more accurately.

[0052] The present application can realize accurate calibration of small buoy wave observation instruments, and improve the reliability and accuracy of observation data. By conducting simulation experiments in a large-scale wave tank, the interference of complex factors in the actual marine environment can be avoided, and the efficiency and accuracy of calibration can be improved. Compared with the calibration method in the prior art, the accuracy and reliability of calibration are improved.

[0053] It should be noted that the terms used in the present invention are only for describing specific embodiments, rather than limiting the scope of the present application. As shown in the present specification, unless the context clearly indicates an exception, the words "one", "a", "a kind of" and / or "the" do not specifically refer to the singular, but may also include the plural. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method or device including the elements.

[0054] It should also be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A calibration method for a small buoy wave observation instrument based on a large-scale wave tank, characterized in that: The steps include: S1. Determine the wave height verification point, wave period verification point and flow velocity verification point; S2. According to the wave height verification point, hoist the small buoy observation instrument into the large-scale wave tank, and fix the anchor of the small buoy observation instrument to the bottom of the large-scale wave tank; S3. According to the position of the small buoy observation instrument, a monitoring device is arranged at the corresponding large-scale wave tank position; the monitoring device includes a high-speed camera, a high-precision video wave height meter and a current meter; S4, inputting the flow parameters of the flow velocity verification point into the flow generation system of the large-scale wave flume, and starting the flow generation system; S5. When the water flow velocity reaches the velocity at the velocity verification point, the corresponding wave making parameters are input into the wave making system of the large-scale wave flume according to the determined wave height verification point and wave period verification point, and the wave making system is started to simulate waves; S6. synchronously collect wave data of monitoring equipment within a preset collection period; S7, calculating the wave characteristic value of each verification point according to the wave data; S8. Determine whether the small buoy observation instrument is qualified based on the wave characteristic values ​​and expected standards.

2. A calibration method for a small buoy wave observation instrument based on a large-scale wave tank according to claim 1, characterized in that: The wave height detection points include regular wave height detection points and irregular wave height detection points, wherein: The wave height verification points of the regular waves are 1.00m, 2.00m, and 3.00m; The wave height verification points of the irregular waves are 0.80m, 1.60m and 2.40m.

3. The method for calibrating a small buoy wave observation instrument based on a large-scale wave tank according to claim 2 is characterized in that: The selection of the wave period verification point at each wave height verification point is determined in the following manner: Set 5 wave period verification points at each regular wave height verification point; Three wave period verification points are set at each wave height verification point of the irregular wave.

4. A method for calibrating a small buoy wave observation instrument based on a large-scale wave tank according to claim 3, characterized in that: The formula for selecting the calibration points for each wave period is: ； Where: Indicates the value of the ith wave cycle test point corresponding to the wave height test point; Indicates the maximum value of the wave period range corresponding to each wave height detection point; Indicates the minimum value of the wave period range corresponding to each wave height detection point.

5. The method for calibrating a small buoy wave observation instrument based on a large-scale wave tank according to claim 4 is characterized in that: The maximum value of the wave period range corresponding to each wave height detection point and the minimum value of the wave period range corresponding to each wave height detection point are calculated as: The maximum value of the wave period range corresponding to each wave height detection point When it is greater than 10 s, = 10 s; The minimum value of the wave period range corresponding to each wave height detection point ;in, It indicates the height of the wave height verification point; g indicates the value of gravitational acceleration.

6. The method for calibrating a small buoy wave observation instrument based on a large-scale wave tank according to claim 1 is characterized in that: The flow velocity verification points are 0.08m / s, 0.16m / s, and 0.24m / s.

7. The method for calibrating a small buoy wave observation instrument based on a large-scale wave tank according to claim 1 is characterized in that , said S6, further comprises: When the preset collection period has not ended, but wave data of 100 complete wave numbers have been collected, the operation of the large-scale wave tank is terminated.

8. The method for calibrating a small buoy wave observation instrument based on a large-scale wave tank according to claim 1 is characterized in that: The wave includes: wave height data, wave period data, flow velocity data and waveform data; The wave characteristic values ​​include: average wave height, significant wave height, 1% wave height, maximum wave height, average wave period, significant wave period, spectrum peak period, total energy of wave energy spectrum and spectrum peak energy of wave energy spectrum.

9. The method for calibrating a small buoy wave observation instrument based on a large-scale wave tank according to claim 1 is characterized in that: The S8 specifically includes: Calculate the error between the wave characteristic value and the expected standard; Set the error threshold for each wave feature; If all error values ​​are less than or equal to the error threshold, the small buoy observation instrument is judged to be qualified; If any error value is greater than the error threshold, the small buoy observation instrument is judged to be unqualified.

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