A simulated tide system with automatic calibration function

Abstract

This invention discloses a simulated tide system with automatic calibration function, including a water tank, a first water storage tank, a second water storage tank, and a controller. A soil layer simulation device is provided in the middle of the water tank. The soil layer simulation device includes a frame, an aquifer, and an impermeable layer, and the water content of each aquifer is different. A first cavity and a second cavity are respectively provided in the water tank on both sides of the soil layer simulation device. Pressure-type water level collectors are provided inside the first cavity and the second cavity, and each water level collector is equipped with an automatic calibration device. The system of this application uses water level collectors with automatic calibration devices to improve the accuracy of experimental data. Furthermore, by setting up the frame, aquifer, and multiple water pumps and electric valves, it can simulate the exchange process between seawater and groundwater during tidal fluctuations, and then determine the impact of groundwater flow on the exchange between seawater and groundwater, providing support for coastal disaster prevention and mitigation.

Description

Technical Field

[0001] This invention relates to the field of tide simulation system technology, specifically a tide simulation system with automatic calibration function. Background Technology

[0002] Existing seawater intrusion tidal simulation devices typically use a simple pusher plate to create wave momentum during experiments. This method relies on a limited set of experimental factors and neglects soil composition and the control of water pressure and flow in the underground freshwater layer, thus affecting the experimental results. Furthermore, to achieve more accurate water level data collection, a simulated tidal system with automatic calibration is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a simulated tide system with automatic calibration function to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a simulated tide system with automatic calibration function, comprising a water tank, a first water storage tank for holding seawater, and a second water storage tank for holding groundwater. A soil layer simulation device is provided in the middle of the water tank. The soil layer simulation device includes a frame constructed of permeable partitions. Multiple partitions are arranged on the frame, each partition containing an aquifer. Except for the uppermost aquifer, a clay-based waterproof layer is laid flat on the upper side of the remaining aquifers. Each aquifer contains a measuring electrode for measuring seawater concentration. A first cavity simulating seawater tides is provided on one side of the water tank located within the soil layer simulation device. Multiple second cavities simulating groundwater layers are provided on the other side of the water tank located within the soil layer simulation device. Each second cavity is connected to an aquifer in a one-to-one correspondence. Water level collectors are provided inside both the first and second cavities.

[0005] Preferably, the side wall of the water tank is connected to a first inlet pipe for injecting seawater from the first water storage tank into the first cavity and a first outlet pipe for discharging seawater from the first cavity into the first water storage tank. A first water pump and a first electric valve are connected in series on the first inlet pipe and the first outlet pipe, respectively.

[0006] The second water storage tank is equipped with a second water inlet pipe for injecting underground fresh water into the second cavity. A second water pump is connected in series on the second water inlet pipe, and a second electric valve is connected in series on a branch of the second water inlet pipe.

[0007] Preferably, a partition is fixedly connected to the middle of each second cavity, and there is a gap between the partition and the soil layer simulation device. The second water tank is provided with a second water outlet pipe for discharging the groundwater inside the second cavity to the second water tank. A third water pump is connected in series on the second water outlet pipe, and the second water outlet pipe and the second water inlet pipe are symmetrically arranged relative to the partition.

[0008] Preferably, a wave-making plate is oscillatingly connected to the inner wall of the first cavity away from the soil layer simulation device, and a crankshaft is rotatably connected to the side wall of the water tank. The crankshaft is driven to rotate by a first motor, and a connecting rod is rotatably connected to the middle of the crankshaft. The end of the connecting rod away from the crankshaft is rotatably connected to the rear side wall of the wave-making plate.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] 1. This invention comprises a soil layer simulation device consisting of a frame, an aquifer, and an impermeable layer. The aquifer is placed within the frame, and each aquifer is separated by the impermeable layer, making the soil layer simulation device closer to the original soil layer. Furthermore, groundwater at different water levels is injected into different second cavities, thereby controlling the pressure of the groundwater in each layer. This simulates the exchange process between seawater and groundwater during tidal fluctuations, providing reliable experimental data and supporting coastal disaster prevention and mitigation.

[0011] 2. By activating the second and third water pumps, the groundwater inside the second cavity circulates, thereby obtaining data on the impact of the groundwater flow on the exchange between seawater and groundwater, further improving the accuracy of the experimental data. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 This is a front view of the overall structure of the present invention;

[0014] Figure 3 This is a schematic diagram of the soil layer simulation device of the present invention, including the first cavity and the second cavity.

[0015] Figure 4 This is a schematic diagram of the structure of the frame, the aquifer, and the second cavity of the present invention;

[0016] Figure 5 This is an exploded view of the frame, aquifer, waterproof layer, and measuring electrodes of the present invention.

[0017] Figure 6 This is a schematic diagram of the structure of the second water storage tank, the second water inlet pipe, the second water outlet pipe and the water tank of the present invention;

[0018] Figure 7 This is a schematic diagram of the structure of the frame, water-bearing layer, partition, and second cavity of the present invention.

[0019] Figure 8 This is a schematic diagram (I) of the structure of the base, measuring cylinder, and solenoid valve of the present invention;

[0020] Figure 9 This is a schematic diagram (II) of the structure of the base, measuring cylinder, and solenoid valve of the present invention;

[0021] Figure 10 This is an exploded view of the base, water level collector, measuring cylinder, column, and solenoid valve of the present invention.

[0022] Figure 11 This is a cross-sectional view of the base, water level collector, measuring cylinder, pump casing, and gear of the present invention.

[0023] Figure 12 This is a schematic diagram (I) of the structure of the water tank, wave generator, and crankshaft of the present invention;

[0024] Figure 13 This is a schematic diagram (II) of the structure of the water tank, wave generator, and crankshaft of the present invention;

[0025] Figure 14 This is a cross-sectional view I of the first water outlet pipe, valve body, first water channel, second water channel and sealing plug of the present invention;

[0026] Figure 15 This is a cross-sectional view II of the first water outlet pipe, valve body, first water channel, second water channel and sealing plug of the present invention;

[0027] Figure 16 This is a simplified circuit control diagram of the present invention.

[0028] In the diagram: 1. Water tank; 2. First water storage tank; 3. Second water storage tank; 4. Soil layer simulation device; 401. Frame; 402. Aquifer; 403. Impermeable layer; 5. First cavity; 6. First inlet pipe; 7. First outlet pipe; 8. First water pump; 9. First electric valve; 901. Valve body; 902. First water channel; 903. Second water channel; 904. Electric push rod; 905. Sealing plug; 10. Measuring electrode; 11. Second cavity; 12. Second inlet pipe; 1 3. Second water pump; 14. Second electric valve; 15. Baffle plate; 16. Second outlet pipe; 17. Third water pump; 18. Water level collector; 19. Wavemaker; 20. Crankshaft; 21. Connecting rod; 22. First motor; 23. Automatic calibration device; 2301. Base; 2302. Column; 2303. Mounting base; 2304. Measuring cylinder; 2305. Solenoid valve; 2306. Two-way pump; 2307. Pump casing; 2308. Gear; 2309. Second motor. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1-16 This invention provides a technical solution: a simulated tide system with automatic calibration function, including a water tank 1, a first water storage tank 2 for holding seawater, and a second water storage tank 3 for holding groundwater. The device also includes a controller that controls the operation of the entire device. A soil layer simulation device 4 is provided in the middle of the water tank 1. The soil layer simulation device 4 includes a frame 401 made of permeable partitions. Multiple partitions are arranged on the frame 401. The frame 401 can be made of glass, and the side walls of the frame 401 have openings for water permeability. Each partition is filled with an aquifer 402. The water content of each aquifer 402 is different and can be formed by different sands or a mixture of sand and soil. For example, each aquifer 402 can be composed of sand particles of different coarseness. The coarseness of the sand grains is selected based on the actual soil moisture content. Coarser sand grains have a higher moisture content, and vice versa. Based on this characteristic, the aquifer 402 more closely resembles the actual soil layer. Except for the uppermost aquifer 402, a clay-based impermeable layer 403 is laid flat on top of the other aquifers 402. This impermeable layer 403 isolates adjacent aquifers 402, preventing rapid cross-flow of water and making the soil layer simulation more realistic. Each aquifer 402 is equipped with a measuring electrode 10 for measuring seawater concentration. The measuring electrode 10 is electrically connected to the controller and is used to measure... The function of measuring the seawater (salt) concentration in aquifer 402 (other types of electrodes can also be used) is to measure the conductivity of seawater in aquifer 402 through measuring electrode 10. The measuring electrode 10 transmits the measured data to the controller. The controller calculates the amount of seawater in aquifer 402 based on the received data, thereby obtaining seawater intrusion tidal simulation data. In addition, the whole structure is made of transparent material, which is convenient for direct external observation. Colored dyes can also be added to the second cavity 11 or the first cavity 5 to visually observe the exchange process. In addition, some substances that are easy to detect can also be added to it, and the permeation and exchange process can be detected by different measuring electrodes 10.

[0031] The water tank 1 is located on one side of the soil layer simulation device 4 and has a first cavity 5 for simulating seawater tides. The water tank 1 is located on the other side of the soil layer simulation device 4 and has a plurality of second cavities 11 for simulating groundwater layers. Each second cavity 11 is connected to the aquifer 402 in a one-to-one correspondence. The first cavity 5 and the second cavity 11 are both equipped with water level collectors 18.

[0032] Water level collector 18 can be a pressure-type water level collector, such as... Figure 8-11 As shown, to improve the accuracy of the water level collector 18, each water level collector 18 is equipped with an automatic calibration device 23. The automatic calibration device 23 includes a base 2301, with the water level collector 18 mounted on the upper side of the base 2301. Multiple columns 2302 are mounted on the base 2301, and mounting bases 2303 are fixedly connected to the upper ends of the columns 2302. A measuring cylinder 2304 is slidably connected between the base 2301 and the mounting base 2303, and the side wall of the measuring cylinder 2304 is slidably fitted onto the columns 2302. The measuring cylinder 2304 is driven to slide by a solenoid valve 2305. Figure 8-9 As shown, the solenoid valve 2305 is fixedly mounted on the upper side of the mounting base 2303, and the output shaft of the solenoid valve 2305 is connected to the measuring cylinder 2304, thereby driving the measuring cylinder 2304 to move vertically upward or downward. The lower end of the measuring cylinder 2304 is in movable contact with the upper side of the base 2301, and the bottom of the measuring cylinder 2304 is open. Figure 9 As shown, when the measuring cylinder 2304 slides downwards and its bottom presses against the upper side of the base 2301, the bottom of the measuring cylinder 2304 is sealed, and at this time, the inside of the measuring cylinder 2304 can be filled with liquid, such as... Figure 8 As shown, when the measuring cylinder 2304 slides upward and its bottom disengages from the upper side of the base 2301, the bottom of the measuring cylinder 2304 opens, and a through hole is provided at the upper end of the measuring cylinder 2304. A bidirectional pump 2306 for driving water flow is fixedly connected to one side wall of the measuring cylinder 2304. The bidirectional pump 2306 includes a pump housing 2307, and two gears 2308 for driving water flow are rotatably connected inside the pump housing 2307. The two gears 2308 are driven to rotate by a second motor 2309. The second motor 2309 is fixedly installed on the side wall of the pump casing 2307, and its output shaft is connected to any one of the gears 2308. When the second motor 2309 starts, it drives the two gears 2308 to rotate in the forward or reverse direction. When the two gears 2308 rotate, they can inject water into the inside of the measuring cylinder 2304 or drain the water from the inside of the measuring cylinder 2304 (the water is injected or drained according to the rotation direction of the gears 2308). Water grooves are provided on both sides of the connection between the two gears 2308.

[0033] The controllers are all electrically connected to the water level collector 18, the solenoid valve 2305, and the bidirectional pump 2306 (second motor 2309).

[0034] The water level sensor 18 located inside the second cavity 11 is calibrated using the same method as the water level sensor 18 located inside the first cavity 5. The calibration steps for the water level sensor 18 are as follows (taking the water level sensor 18 inside the first cavity 5 as an example):

[0035] Step 1: When the amount of seawater injected into the first cavity 5 is lower than the height of the measuring cylinder 2304 during the experiment, the solenoid valve 2305 is activated. At this time, the solenoid valve 2305 drives the measuring cylinder 2304 to slide downward, so that the bottom of the measuring cylinder 2304 presses against the upper side of the base 2301 and seals it.

[0036] Step 2: Start the second motor 2309, which drives the two gears 2308 to rotate, causing the bidirectional pump 2306 to discharge the liquid inside the measuring cylinder 2304, thus placing the water level collector 18 inside the measuring cylinder 2304 in the air. The controller reads the value of the water level collector 18 in this state and performs zero-point correction on the water level collector 18 to complete the calibration.

[0037] Step 3: After the bidirectional pump 2306 is started in reverse, water is injected into the liquid vector cylinder 2304 in the first cavity 5 until the water inside the measuring cylinder 2304 flows out from the upper through hole of the measuring cylinder 2304. At this time, the water level collector 18 measures the water level in the measuring cylinder 2304 to obtain the value D and sends the data D to the controller.

[0038] Step 4: The controller compares the received data D with the previously known height data of the measuring cylinder 2304 to obtain the measurement error data D1;

[0039] Step 5: The controller compares the data D1 with the allowable error range of the water level collector 18 to complete the verification of the water level collector 18;

[0040] Step 6: If data D1 is within the allowable error range of the water level collector 18, the water level collector 18 is in normal use. At this time, the solenoid valve 2305 drives the measuring cylinder 2304 to slide upward, causing the measuring cylinder 2304 to detach from the upper side of the base 2301. At this time, the water level collector 18 is inside the first cavity 5, and detects the water level of the seawater in the first cavity 5 and transmits the detected data to the controller. If data D1 exceeds the allowable error range of the water level collector 18, the water level collector 18 cannot be used normally, and the controller will issue an alarm.

[0041] Specifically, the side wall of the water tank 1 is connected to a first inlet pipe 6 for injecting seawater from the first water storage tank 2 into the first cavity 5 and a first outlet pipe 7 for discharging seawater from the first cavity 5 into the first water storage tank 2. A first water pump 8 and a first electric valve 9 are connected in series on the first inlet pipe 6 and the first outlet pipe 7, respectively. Figure 1 As shown, when the first water pump 8 starts, it draws seawater from the first water storage tank 2 and injects it into the first cavity 5 through the first inlet pipe 6, thereby raising the seawater level inside the first cavity 5 and simulating the rising tide process. When the first electric valve 9 opens, the seawater inside the first cavity 5 is discharged into the first water storage tank 2 through the first outlet pipe 7, thereby simulating the receding tide process. Both the first water pump 8 and the first electric valve 9 are electrically connected to the controller. The controller can control the starting of the first water pump 8 and the first electric valve 9, and can also control the water flow rate when the first water pump 8 and the first electric valve 9 are open. At this time, the rising and receding tide speeds during the tide simulation can be controlled.

[0042] like Figure 14-15 As shown, the first electric valve 9 includes a valve body 901, a first water channel 902, a second water channel 903, an electric push rod 904, and a sealing plug 905. The first water channel 902 and the second water channel 903 are located inside the valve body 901 and are connected to the first water outlet pipes 7 on both sides of the valve body 901. The electric push rod 904 is fixed on the side wall of the valve body 901, and the sealing plug 905 is fixedly connected to the output shaft of the electric push rod 904. The electric push rod 904 causes the sealing plug 905 to slide inside the valve body 901, thereby blocking and isolating the first water channel 902 and the second water channel 903, thus regulating the on / off state of the first water outlet pipe 7.

[0043] The second water tank 3 is equipped with a second water inlet pipe 12 for injecting underground fresh water into the second cavity 11. A second water pump 13 is connected in series on the second water inlet pipe 12, and a second electric valve 14 is connected in series on a branch of the second water inlet pipe 12. The structure of the second electric valve 14 is the same as that of the first electric valve 9. When the second water pump 13 is started and the second electric valve 14 corresponding to the second cavity 11 is opened, the underground fresh water in the second water tank 3 will be injected into the corresponding second cavity 11. At this time, the water level of the underground fresh water in the second cavity 11 can be adjusted, thereby adjusting the water pressure in the second cavity 11, so that the simulated data of the underground fresh water in the second cavity 11 is closer to reality.

[0044] To ensure the fluidity of the groundwater inside the second cavity 11, specifically, a partition 15 is fixedly connected to the middle of each second cavity 11. The partition 15 has a gap with the soil layer simulation device 4. The second water storage tank 3 is equipped with a second outlet pipe 16 for discharging the groundwater inside the second cavity 11 to the second water storage tank 3. A third water pump 17 is connected in series on the second outlet pipe 16. The second outlet pipe 16 and the second inlet pipe 12 are symmetrically arranged with respect to the partition 15. The second outlet pipe 16 and the second inlet pipe 12 have the same structure. A second electric valve 14 is also provided on the second outlet pipe 16. The second water pump 13, the third water pump 17, the second electric valve 14 on the second outlet pipe 16 and the second electric valve 14 on the second inlet pipe 12 are all electrically connected to the controller.

[0045] When the controller starts the second water pump 13 and the second electric valve 14 on the second inlet pipe 12, the underground freshwater inside the second water tank 3 is injected into the interior of each second cavity 11, so that the water level inside the second cavity 11 is at the height required for the experiment. When it is necessary to make the water inside the second cavity 11 flow, the controller simultaneously starts the second water pump 13 and the third water pump 17 (the flow rates of the second water pump 13 and the third water pump 17 are the same), and the controller controls the second electric valve 14 on the second outlet pipe 16 and the second electric valve 14 on the second inlet pipe 12 to open (the symmetrical second electric valves 14 open to the same degree). This enables the water to flow inside the second cavity 11, and then the data on the impact of the underground freshwater flow on the exchange between seawater and underground freshwater can be obtained, further improving the accuracy of the experimental data. In addition, the water flow velocity inside the second cavity 11 can be adjusted by the opening degree of the second electric valve 14, which helps to make the water flow velocity inside the second cavity 11 closer to the actual groundwater flow.

[0046] like Figure 12-13As shown, to make the seawater tide simulation in the first cavity 5 more realistic, specifically, a wave-making plate 19 is oscillatingly connected to the inner wall of the first cavity 5 away from the soil layer simulation device 4, and a crankshaft 20 is rotatably connected to the side wall of the water tank 1. The crankshaft 20 is driven to rotate by a first motor 22, which is fixedly connected to the side wall of the water tank 1. The output shaft of the first motor 22 is connected to one end of the crankshaft 20 via a belt. When the first motor 22 starts, the output shaft of the first motor 22 drives the crankshaft 20 to rotate. A connecting rod 21 is rotatably connected to the middle of crankshaft 20. The end of the connecting rod 21 away from crankshaft 20 is rotatably connected to the rear side wall of wave-making plate 19. When crankshaft 20 rotates, crankshaft 20 pulls wave-making plate 19 through connecting rod 21, causing wave-making plate 19 to swing back and forth inside the first cavity 5. This causes wave-making plate 19 to push the seawater in the first cavity 5 to move and form waves, thereby making the seawater tide simulation closer to reality. The first motor 22 is electrically connected to the controller, which can control the speed of the first motor 22 and thus adjust the frequency of the simulated waves.

[0047] Work process:

[0048] Experimental data, including tidal data, wave data, and data from each of the second cavities 11, are input into the controller beforehand.

[0049] Tidal data includes high tide level, high tide time, low tide level, and low tide time;

[0050] Wave data includes wave frequency;

[0051] The data for each second cavity 11 includes the level of freshwater injected into each second cavity 11;

[0052] Experimental simulation steps:

[0053] Step 1: The controller starts the second water pump 13 and the second electric valve 14, so that the groundwater in the second water tank 3 is injected into the interior of each second cavity 11 at a certain rate. The water level collector 18 detects the water level in the second cavity 11. When the water level reaches the preset water level, the controller controls the corresponding second electric valve 14 to close. When the water level in all the second cavities 11 reaches the preset water level, the controller controls the second water pump 13 to stop.

[0054] Step 2: The controller controls the first water pump 8 to start, so that the seawater inside the first water tank 2 is injected into the first cavity 5 at a predetermined rate. The water level collector 18 detects the water level inside the first cavity 5, thereby realizing the simulation of high tide. At the same time, the controller controls the first motor 22 to drive the wave-making plate 19 to circulate and create waves at a predetermined wave-making frequency.

[0055] Step 3: When the water level collector 18 detects that the water level inside the first cavity 5 has reached a predetermined height, the controller stops the first water pump 8 and controls the first electric valve 9 to start, so that the seawater inside the first cavity 5 is discharged from the first outlet pipe 7 to the inside of the first water storage tank 2 at a predetermined speed, and then the tide is simulated.

[0056] In the above steps, the measuring electrode 10 detects the salt concentration of each aquifer 402 in real time and transmits the measured data to the controller for storage, thereby obtaining data on the exchange process between seawater and groundwater during simulated tidal fluctuations. Of course, the type of measuring electrode 10 can be changed according to the actual situation, such as electrodes used to measure parameters such as conductivity, nitrogen content, and COD.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A simulated tide system with automatic calibration function, comprising a water tank (1), a first water storage tank (2) and a second water storage tank (3), and a controller for controlling the operation of the entire device, a soil layer simulation device (4) is arranged in the middle of the water tank (1), the soil layer simulation device (4) comprises a frame (401) with water-permeable partition plates lapped, a plurality of partitions are arranged on the frame (401), the inside of each partition is filled with a water-containing layer (402), a water-impermeable layer (403) composed of clay is laid on the upper side of each water-containing layer (402) except the uppermost water-containing layer (402), and a measuring electrode (10) is arranged in the inside of each water-containing layer (402), a first cavity (5) for simulating seawater tide is arranged on one side of the water tank (1) where the soil layer simulation device (4) is located, a plurality of second cavities (11) for simulating groundwater layers are arranged on the other side of the water tank (1) where the soil layer simulation device (4) is located, each second cavity (11) corresponds to a water-containing layer (402) and communicates with it, and a water level collector (18) is arranged in the inside of each of the first cavity (5) and the second cavity (11), A first cavity (5) is arranged on one side of the water tank (1) where the soil layer simulation device (4) is located, and a wave-making plate (19) is swingably connected to the inner side wall of the first cavity (5) away from the soil layer simulation device (4), characterized in that The water-containing layers (402) are formed by sand or a mixture of sand and soil, and the water content of each water-containing layer (402) is different, and the water tank (1) and the frame (401) are made of transparent material, Each water level collector (18) is provided with an automatic calibration device (23), the automatic calibration device (23) comprises a base (2301), the water level collector (18) is arranged on the upper side of the base (2301), a measuring cylinder (2304) is slidably arranged on the base (2301), the measuring cylinder (2304) is driven to move vertically upward or downward by an electromagnetic valve (2305), the bottom of the measuring cylinder (2304) is provided with an opening, when the measuring cylinder (2304) slides downward and its bottom presses against the upper side of the base (2301), the bottom of the measuring cylinder (2304) is closed, at this time the inside of the measuring cylinder (2304) can contain liquid, a through hole is formed in the upper end of the measuring cylinder (2304), a bidirectional pump (2306) for driving water flow is fixedly connected to the side wall of the measuring cylinder (2304), and the bidirectional pump (2306) injects water into the inside of the measuring cylinder (2304) or discharges water in the inside of the measuring cylinder (2304); A first water inlet pipe (6) and a first water outlet pipe (7) are connected to the side wall of the water tank (1); A second water inlet pipe (12) is arranged on the second water storage tank (3), a second water pump (13) is connected in series to the second water inlet pipe (12), and a second electric valve (14) is connected in series to the branch of the second water inlet pipe (12); A first water pump (8) and a first electric valve (9) are connected in series to the first water inlet pipe (6) and the first water outlet pipe (7) respectively, and the experimental simulation steps of the simulated tide system are as follows, The first step: the controller controls the start of the second water pump (13) and the second electric valve (14), so that the underground fresh water in the second water storage tank (3) is injected into each second cavity 11, and the water level in the second cavity (11) is detected by the water level collector (18). When the water level reaches the preset water level, the controller controls the corresponding second electric valve (14) to close. When the water level in all second cavities (11) reaches the preset water level, the controller controls the second water pump (13) to stop; The second step: the controller controls the start of the first water pump (8), so that the seawater in the first water storage tank (2) is injected into the first cavity (5) at a predetermined rate. The water level in the first cavity (5) is detected by the water level collector (18) to realize the simulation of the tide rise. At the same time, the controller controls the first motor (22) to drive the wave making plate (19) to swing at a predetermined wave making frequency to make waves; The third step: when the water level collector (18) detects that the water level in the first cavity (5) reaches the predetermined height, the controller stops the first water pump (8), and the controller controls the first electric valve (9) to start, so that the seawater in the first cavity (5) is discharged from the first water outlet pipe (7) to the inside of the first water storage tank (2) at a predetermined speed, and then the ebb tide simulation is performed; The calibration steps of the water level collector (18) are as follows: The first step: when the amount of seawater injected into the first cavity (5) is lower than the height of the measuring cylinder (2304) during the experiment, start the electromagnetic valve (2305). At this time, the electromagnetic valve (2305) drives the measuring cylinder (2304) to slide downward, so that the bottom of the measuring cylinder (2304) seals against the upper side of the base (2301); The second step: start the second motor (2309) to drive the bidirectional pump (2306) to discharge the liquid in the measuring cylinder (2304), so that the water level collector (18) in the measuring cylinder (2304) is placed in the air. The controller reads the value of the water level collector (18) in this state, and the controller corrects the zero point of the water level collector (18) to complete the calibration; The third step: after reversing the start of the bidirectional pump (2306), the liquid in the first cavity (5) is injected into the inside of the measuring cylinder (2304), so that the water in the measuring cylinder (2304) flows out from the upper end hole of the measuring cylinder (2304). At this time, the water level collector (18) measures the water level in the measuring cylinder (2304) to obtain a value D, and sends the data D to the controller; The fourth step: the controller compares the received data D with the height data of the measuring cylinder (2304) obtained in advance to obtain the measurement error data D1; The fifth step: the controller compares the data D1 with the allowable error range of the water level collector (18) to complete the verification of the water level collector (18); The sixth step: if the data D1 is within the allowable error range of the water level collector (18), the water level collector (18) is normal; if the data D1 is beyond the allowable error range of the water level collector (18), the water level collector (18) cannot be used normally, and the controller alarms.

2. A simulated tide system with automatic calibration function according to claim 1, characterized in that: The middle part of each second cavity (11) is fixedly connected with a partition plate (15), the partition plate (15) is spaced apart from the soil layer simulation device (4), the second water storage tank (3) is provided with a second water outlet pipe (16) for discharging underground fresh water in the second cavity (11) to the second water storage tank (3), the second water outlet pipe (16) is connected with a third water pump (17) in series, the second water outlet pipe (16) is also provided with a second electric valve (14), and the second water pump (13), the third water pump (17), the second electric valve (14) on the second water outlet pipe (16) and the second electric valve (14) on the second water inlet pipe (12) are electrically connected with the controller.

3. The analog tide system with automatic calibration function according to claim 1, characterized in that: The controller controls the starting of the second water pump (13) and the third water pump (17) at the same time, and controls the second electric valve (14) on the second water outlet pipe (16) and the second electric valve (14) on the second water inlet pipe (12) to be opened to realize the water flow in the second cavity (11).

4. The analog tide system with automatic calibration function according to claim 1, characterized in that: The base (2301) is provided with a plurality of stand columns (2302), the upper ends of the plurality of stand columns (2302) are fixedly connected with mounting seats (2303), a measuring cylinder (2304) is slidingly arranged between the base (2301) and the mounting seat (2303), the side wall of the measuring cylinder (2304) is slidingly sleeved on the stand column (2302), an electromagnetic valve (2305) is fixedly installed on the upper side of the mounting seat (2303), and the output shaft of the electromagnetic valve (2305) is connected with the measuring cylinder (2304).

5. The analog tide system with automatic calibration function according to claim 1, characterized in that: The bidirectional pump (2306) comprises a pump shell (2307), two gears (2308) for driving water flow are rotatably connected in the pump shell (2307), the two gears (2308) are driven to rotate by a second motor (2309), the second motor (2309) is fixedly installed on the side wall of the pump shell (2307), and the output shaft of the second motor (2309) is connected with any gear (2308), when the second motor (2309) is started, the second motor (2309) drives the two gears (2308) to rotate in the forward direction or the reverse direction.

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