Apparatus and method for measuring flow and pressure of fluid in supergravity environment

Abstract

Disclosed in the present invention are an apparatus and method for measuring flow and pressure of a fluid in a supergravity environment. Two reservoirs, liquid level monitoring systems, a flow monitoring system, a pumping system, and a pressure monitoring system are all fixed by means of a bottom plate and placed on a geotechnical centrifuge. A flow pump is connected to an oil outlet of the geotechnical centrifuge. Pneumatic ball valves used need a gas source, and the pneumatic ball valves are connected to a gas outlet of the geotechnical centrifuge. Signals of the liquid level monitoring systems, the flow monitoring system, the pumping system, and the pressure monitoring system are all transmitted to a control center by means of a cable. The measurement method comprises: hoisting a measurement apparatus and placing same into a basket of a geotechnical centrifuge, and acquiring the flow and pressure of a fluid by using liquid level monitoring systems, a flow monitoring system, a pressure gauge and the like in a supergravity environment. The present invention is used for simultaneously testing and calibrating devices such as a flow pump, a flow meter, and a pressure sensor in a test by using fluid circulation flow technology in a supergravity environment generated by a geotechnical centrifuge, thereby ensuring normal operation and function implementation of an onboard apparatus.

Description

A device and method for measuring fluid flow rate and pressure under hypergravity conditions. Technical Field

[0001] This invention belongs to the field of fluid motion monitoring, and in particular relates to a device and method for measuring fluid flow rate and pressure under hypergravity conditions. Background Technology

[0002] Exploring the laws governing the motion of matter under different gravitational conditions has always been a topic of great interest. The behavior of matter under microgravity conditions, as an important research subject in space science, has been explored in considerable depth. Currently, humans are beginning to utilize hypergravity to explore the laws governing the motion of matter in nature. Hypergravity centrifuges, through the hypergravity field generated by centrifugal rotation, are an effective means of creating a stable hypergravity field on Earth. Indoor physics experiments using hypergravity fields can simulate real physical processes under normal gravity, achieving the reproduction of stress levels in large-scale media under normal gravity within small-scale media.

[0003] With the continuous development of centrifugal hypergravity technology, the transport of fluids such as water, gas, and slurry has become an inevitable trend in the development of airborne devices towards greater complexity and higher fidelity. Currently, patent CN110987750A designs a one-dimensional permeation erosion test device under hypergravity conditions, which needs to consider water transport and involves equipment such as centrifugal pumps and flow meters; patent CN116297105A designs a mud permeation test device under hypergravity conditions, which needs to consider mud transport and involves equipment such as mud pumps and pressure sensors. Research has found that conventional electromechanical equipment and sensors may malfunction or have limited functionality under hypergravity. Therefore, it is necessary to provide a testing method for fluid equipment and sensors under hypergravity, and to provide calibration methods for pressure head, flow rate generated by head difference, and pumping flow rate to ensure the normal operation and functional realization of airborne devices.

[0004] Summary of the Invention

[0005] To address the problems existing in the background technology, this invention provides a device and method for measuring fluid flow rate and pressure in the hypergravity environment generated by a geotextile centrifuge, utilizing fluid circulation technology. The implementation of this device and method will greatly save time and economic costs, contributing to the development of onboard equipment for geotextile centrifuges.

[0006] The technical solution of this invention is as follows:

[0007] I. A device for measuring fluid flow rate and pressure under hypergravity conditions:

[0008] The device includes a first liquid reservoir, a second liquid reservoir, a liquid level monitoring system, a flow monitoring system, and a pumping system. Both the first and second liquid reservoirs are equipped with liquid level monitoring systems. The output of the first liquid reservoir is connected to the input of the second liquid reservoir via the flow monitoring system. The output of the second liquid reservoir is connected to the input of the first liquid reservoir via the pumping system. The first liquid reservoir, the second liquid reservoir, and the liquid level monitoring system are all fixedly connected to a base plate, which is placed on the basket of the geotextile centrifuge. The liquid level monitoring system, the flow monitoring system, and the pumping system are all electrically connected to an external control center.

[0009] The liquid level monitoring system includes a liquid level sensor, a first liquid level switch module, a second liquid level switch module, two liquid level tubes, and seven industrial cameras. The liquid level sensor is installed on the inner wall of the first liquid reservoir to measure the liquid level in the first liquid reservoir in real time. The two liquid level tubes are respectively installed vertically on the side walls of the first and second liquid reservoirs to observe the changes in the liquid level in the first and second liquid reservoirs. The first and second liquid level switch modules are respectively installed on the side walls of the first and second liquid reservoirs. The first liquid level switch module mainly consists of four vertically spaced liquid level indicator lights, and the second liquid level switch module mainly consists of three vertically spaced liquid level indicator lights. The seven industrial cameras are fixedly connected to the base plate through brackets, and the seven industrial cameras are used to acquire the on / off status of the seven liquid level indicator lights.

[0010] Both the liquid level sensor and the industrial camera are electrically connected to the control center.

[0011] The flow monitoring system includes a flow pipeline, a flow meter, and a first pneumatic ball valve; the output end of the first liquid reservoir is connected to the input end of the second liquid reservoir through the flow pipeline, and the flow meter and the first pneumatic ball valve are sequentially installed on the flow pipeline from the first liquid reservoir to the second liquid reservoir, and the gas input end of the first pneumatic ball valve is connected to the air outlet of the geotextile centrifuge.

[0012] The measuring device also includes two pressure sensors, which are fixedly connected inside the first and second liquid reservoirs, respectively, and are at the same height as the flow pipe. The pressure sensors, flow meter, and first pneumatic ball valve are all connected to the control center, which is used to control the opening and closing degree of the first pneumatic ball valve, thereby controlling the fluid flow rate in the flow pipe.

[0013] The pumping system includes a pumping pipeline, a flow pump, and a second pneumatic ball valve. The output end of the second reservoir is connected to the input end of the first reservoir through the pumping pipeline. The second pneumatic ball valve and the flow pump are sequentially installed on the pumping pipeline from the second reservoir to the first reservoir. The gas input end of the second pneumatic ball valve is connected to the air outlet (605) of the geotextile centrifuge, and the input end of the flow pump is connected to the oil outlet of the geotextile centrifuge. Both the flow pump and the second pneumatic ball valve are connected to the control center, and the control center is used to control the opening and closing degree of the second pneumatic ball valve, thereby controlling the fluid flow rate in the pumping pipeline.

[0014] The oil outlet of the geotextile centrifuge is connected to the input end of the flow pump through the main pipeline. From the oil outlet to the flow pump, the main pipeline is equipped with a solenoid ball valve, a pressure reducing valve, a reversing valve, a proportional speed regulating valve, a pressure sensor, and a gear flow meter. The oil outlet of the geotextile centrifuge is also directly connected to the oil inlet of the flow pump through a secondary pipeline.

[0015] II. A method for measuring fluid flow rate and pressure under hypergravity conditions, comprising the following steps:

[0016] Step S1: Use a crane to hoist the entire measuring device into the second basket of the geotechnical centrifuge. Then, inject clean water into the first liquid reservoir to the target liquid level height H. Connect the liquid level monitoring system, flow monitoring system and pumping system to the control center.

[0017] Step S2: Start the geotextile centrifuge and open the first pneumatic ball valve under hypergravity to allow the liquid in the first reservoir to flow to the second reservoir. At the same time, the liquid level indicator and liquid level sensor are tested for compliance during the liquid flow.

[0018] Step S3: When the liquid levels in the first and second reservoirs are equal, the liquid stops flowing. At this point, close the first pneumatic ball valve and open the second pneumatic ball valve. Use a flow pump to pump the water from the second reservoir back into the first reservoir. Simultaneously, perform a quality check on the flow pump during the liquid pumping process.

[0019] If the flow pump test result is qualified, proceed to step S4;

[0020] Otherwise, stop the experiment, replace the defective flow pump, and repeat step S3 until the test conditions are met.

[0021] Step S4: Open the first pneumatic ball valve to allow the liquid in the first reservoir to flow to the second reservoir, and at the same time, perform a qualification test on the flow meter and pressure sensor during the liquid flow process.

[0022] If the flow meter and pressure sensor test results are qualified, proceed to step S5;

[0023] Otherwise, stop the experiment, replace the unqualified flow meter or pressure sensor, and repeat step S4 until the test conditions are met.

[0024] Step S5: When the liquid levels in the first and second liquid reservoirs are equal, the liquid stops flowing. At this time, close the first pneumatic ball valve and open the second pneumatic ball valve. Use a flow pump to pump the water in the second liquid reservoir back into the first liquid reservoir. After all the water has been pumped back into the first liquid reservoir, close the second pneumatic ball valve and start the first pneumatic ball valve.

[0025] Step S6: Repeat step S5 multiple times to achieve liquid circulation between the first and second liquid reservoirs. During the liquid circulation, the pressure sensor, gear flow meter, and flow meter are used to collect the liquid pressure, pump flow rate of the flow pump, and flow rate of the liquid under the action of water head in real time.

[0026] The specific steps of S2 are as follows:

[0027] Step S2.1: Start the geotextile centrifuge and gradually increase the centrifugal acceleration of the geotextile centrifuge to the preset Ng. After the centrifugal acceleration stabilizes, open the first pneumatic ball valve. Under the action of the head difference, the liquid in the first reservoir flows to the second reservoir through the flow pipe. At the same time, the liquid level indicator and liquid level sensor are tested for compliance during the liquid flow process.

[0028] The specific method for passing the qualification test of the liquid level indicator light in step S2.1 is as follows: During liquid flow, the liquid level indicator light is tested for qualification using a transparent liquid level tube.

[0029] If the liquid level indicator light corresponds to the liquid level in the liquid level tube when it is on or off, it indicates that the liquid level indicator light is qualified.

[0030] Otherwise, it indicates that the liquid level indicator light is faulty;

[0031] The specific method for performing a qualification test on the liquid level sensor in step S2.1 is as follows: The liquid level sensor is tested for qualification by using a transparent liquid level tube to indicate the liquid flow process.

[0032] If the reading of the liquid level sensor matches the liquid level in the liquid level tube, it indicates that the liquid level sensor is qualified.

[0033] Otherwise, it indicates that the liquid level sensor is defective;

[0034] Step S2.2: Determine the qualification of the liquid level switch module. The seven liquid level indicator lights in a qualified liquid level switch module meet the following conditions:

[0035] The liquid level indicator light on the top of the first liquid level switch module is qualified;

[0036] The first liquid level indicator light from bottom to top of the first liquid level switch module is qualified, or the first liquid level indicator light from top to bottom of the second liquid level switch module is qualified;

[0037] The second liquid level indicator light from bottom to top of the first liquid level switch module is qualified, or the second liquid level indicator light from top to bottom of the second liquid level switch module is qualified;

[0038] The third liquid level indicator light from the bottom of the first liquid level switch module is qualified, or the third liquid level indicator light from the top of the second liquid level switch module is qualified;

[0039] If the seven liquid level indicator lights in the liquid level switch module meet the above four conditions, it indicates that the liquid level switch module has passed the test; otherwise, it indicates that the liquid level switch module has failed the test.

[0040] Step S2.3: If at least one of the liquid level switch module and the liquid level sensor passes the test, proceed to step S3.

[0041] Otherwise, stop the experiment, replace the unqualified level sensor / level indicator, and repeat steps S2.1 to S2.2 until the test conditions are met.

[0042] The specific method for performing a qualification test on the flow pump during the liquid pumping process in step S3 is as follows:

[0043] Step S3.1: Open the solenoid ball valve, pressure reducing valve and directional valve, and adjust the proportional speed control valve so that the reading of the gear flow meter reaches the preset pumping hydraulic flow value.

[0044] Step S3.2: Record the moment when the second pneumatic ball valve is opened as the start time T1, and record the moment when the liquid level in the first reservoir reaches the target liquid level H as the end time T2. Close the second pneumatic ball valve and obtain the theoretical pumping hydraulic flow rate Q according to the following formula:

[0045] Where A is the cross-sectional area of ​​the first liquid reservoir;

[0046] Step S3.2: Next, compare the theoretical pumped hydraulic flow rate Q with the reading of the gear flow meter:

[0047] If the error between the reading of the gear flow meter and the theoretical pumped hydraulic flow Q is within ±5%, it indicates that the flow pump is qualified during the liquid pumping process.

[0048] Otherwise, it indicates that the flow pump is unqualified.

[0049] The specific method for performing a qualification test on the pressure sensor in step S4 is as follows:

[0050] First, the theoretical pressure value P of the liquid is obtained using the following formula. h :

[0051] In the formula, P h The theoretical pressure of the liquid at a liquid level height of h is represented by ρ; the liquid density is represented by ω; the angular velocity of the geotextile centrifuge is represented by R. max H is the distance from the center of the geotextile centrifuge shaft to the bottom of the second basket; h is the liquid level height; H1 is the distance from the pressure sensor to the bottom of the reservoir (1,2); H2 is the distance from the bottom of the reservoir (1,2) to the bottom of the second basket.

[0052] Then the theoretical pressure value P of the liquid h Compare with readings from the same liquid level and pressure sensor:

[0053] If the pressure sensor reading differs from the theoretical pressure value P h If the error is within ±5%, the pressure sensor is considered qualified.

[0054] Otherwise, it indicates that the pressure sensor is defective.

[0055] The specific method for performing a qualification test on the flow meter in step S4 is as follows:

[0056] If the liquid level switch module passes the test in step S2.2, the flow meter is tested for compliance using the liquid level indicator light.

[0057] Step S4.1: Start timing from opening the first pneumatic ball valve, and record the flow meter reading every 1 second. When the liquid level in the first reservoir changes to the height of each qualified liquid level indicator light in the liquid level switch module, record the corresponding liquid level change time difference Δt. i (i = 1, 2, 3), and obtain the theoretical flow rate Q' according to the following formula:

[0058] Wherein, Δt1 represents the time required for the liquid level in the first reservoir to drop by a height of ΔH1; Δt2 represents the time required for the liquid level in the first reservoir to drop by a height of ΔH2; Δt3 represents the time required for the liquid level in the first reservoir to drop by a height of ΔH3; ΔH1 represents the height difference between the first and second liquid level indicator lights from top to bottom on the first liquid level switch module; ΔH2 represents the height difference between the second and third liquid level indicator lights from top to bottom on the first liquid level switch module; ΔH3 represents the height difference between the third and fourth liquid level indicator lights from top to bottom on the first liquid level switch module.

[0059] Step S4.2: Then, compare the theoretical flow rate Q' with the flow meter reading:

[0060] If the error between the flow meter reading and the theoretical flow rate Q' is within ±5%, the flow meter is considered qualified.

[0061] Otherwise, it indicates that the flow meter is unqualified;

[0062] If the liquid level sensor passes the test in step S2.1, the flow meter is then tested for compliance using the liquid level sensor.

[0063] Step S4.1: Start timing from the opening of the first pneumatic ball valve, obtain the change in the liquid level sensor reading within a random time interval δt, and obtain the theoretical flow rate Q' according to the following formula:

[0064] Among them, H δt This represents the difference in readings of the level sensor over the time interval δt;

[0065] Step S4.2: Then, compare the theoretical flow rate Q' with the flow meter reading:

[0066] If the error between the flow meter reading and the theoretical flow rate Q' is within ±5%, the flow meter is considered qualified.

[0067] Otherwise, it indicates that the flow meter is unqualified.

[0068] The first liquid reservoir, second liquid reservoir, liquid level monitoring system, flow monitoring system, pumping system, and pressure monitoring system (pressure sensor) of this invention are all fixed by a base plate and placed on a geotextile centrifuge. The flow pump of this invention is a hydraulic pump, connected to the oil outlet of the geotextile centrifuge. The pneumatic ball valve requires an air source and is connected to the air outlet of the geotextile centrifuge. The signals from the liquid level monitoring system, flow monitoring system, pumping system, and pressure monitoring system are all transmitted to the control center via cables. This invention aims to provide a device and method for simultaneously testing and calibrating equipment such as a flow pump, flow meter, pressure sensor, and liquid level monitoring system in a single test, utilizing fluid circulation technology in the hypergravity environment generated by a geotextile centrifuge.

[0069] The beneficial effects of this invention are as follows:

[0070] 1. This invention can obtain the effects of different Ng values ​​on fluid equipment and sensors under hypergravity environment.

[0071] 2. This invention utilizes fluid circulation technology to simultaneously measure the flow rate generated by the pressure head and head difference under hypergravity, as well as the pumping flow rate, in a single experiment, saving experimental costs and time.

[0072] 3. The device of the present invention has a high degree of mechanization, complete communication equipment, and strong logical operation steps, making it easy for test personnel to operate. Attached Figure Description

[0073] Figure 1 is a front view of the structure of the device of the present invention;

[0074] Figure 2 is a top view of the structure of the device of the present invention;

[0075] Figure 3 is a schematic diagram of the geotextile centrifuge of the present invention;

[0076] Figure 4 is a schematic diagram of the device connection principle of the present invention;

[0077] In the diagram: 1. First liquid reservoir; 2. Second liquid reservoir; 3. Base plate; 4. Support frame; 5. Connector; 6. Geotechnical centrifuge; 7. Flow pipe; 8. Pumping pipe; 9. Flow meter; 10. Flow pump; 11. First pneumatic ball valve; 12. Second pneumatic ball valve; 13. Liquid level sensor; 14. Pressure sensor; 15. Liquid level indicator light; 16. Liquid level pipe; 17. Industrial camera; 18. Image acquisition device; 19. Cable; 20. Control center; 21. Solenoid ball valve; 22. Pressure reducing valve; 23. Directional control valve; 24. Proportional speed control valve; 25. Pressure sensor; 26. Gear flow meter; 601. First suspended platform; 602. Counterweight; 603. Second suspended platform; 604. Rotating arm; 605. Air outlet; 606. Oil outlet. Detailed Implementation

[0078] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0079] As shown in Figures 1 and 2, the device includes a first liquid reservoir 1, a second liquid reservoir 2, a liquid level monitoring system, a flow monitoring system, and a pumping system. Both the first liquid reservoir 1 and the second liquid reservoir 2 are equipped with liquid level monitoring systems. The output of the first liquid reservoir 1 is connected to the input of the second liquid reservoir 2 via the flow monitoring system, and the output of the second liquid reservoir 2 is connected to the input of the first liquid reservoir 1 via the pumping system. The first liquid reservoir 1, the second liquid reservoir 2, and the liquid level monitoring systems are all fixedly connected to a base plate 3, which is placed on the basket of the geotextile centrifuge 6. The liquid level monitoring system, the flow monitoring system, and the pumping system are all electrically connected to an external control center 20. The signals from the liquid level monitoring system, the flow monitoring system, and the pumping system are all transmitted to the control center 20 via cable 19.

[0080] As shown in Figure 3, the geotextile centrifuge 6 includes a first basket 601, a second basket 603, and a centrifuge base. The first basket 601 and the second basket 603 are respectively fixedly installed on both sides of the centrifuge base via a rotating arm 604. A counterweight 602 is placed inside the first basket 601. The measuring device is installed inside the second basket 603. An image acquisition device 18 is provided on the rotating arm 604 connecting the second basket 603 and the centrifuge base.

[0081] The liquid level monitoring system includes a liquid level sensor 13, a first liquid level switch module, a second liquid level switch module, two liquid level tubes 16, and seven industrial cameras 17. The liquid level sensor 13 is installed on the inner wall of the first liquid reservoir 1 to measure the liquid level in the first liquid reservoir 1 in real time. The two liquid level tubes 16 are respectively vertically installed on the side walls of the first liquid reservoir 1 and the second liquid reservoir 2 to observe changes in the liquid level in the first liquid reservoir 1 and the second liquid reservoir 2. The first liquid level switch module and the second liquid level switch module are respectively installed on the side walls of the first liquid reservoir 1 and the second liquid reservoir 2. The first liquid level switch module mainly... The first liquid level indicator 15 consists of four vertically spaced liquid level indicator lights 15. The second liquid level switch module mainly consists of three vertically spaced liquid level indicator lights 15. When the liquid reaches the height of the liquid level switch 15, the corresponding liquid level indicator light 15 lights up; otherwise, the liquid level indicator light 15 is off. Seven industrial cameras 17 are fixedly connected to the base plate 3 via bracket 4. The bottom of the bracket 4 is vertically fixedly connected to the base plate 3 via connector 5. The seven industrial cameras 17 are used to acquire the on / off status of the seven liquid level indicator lights 15. The number and distribution height of the industrial cameras 17 are consistent with the liquid level indicator lights 15.

[0082] Both the liquid level sensor 13 and the industrial camera 17 are electrically connected to the control center 20.

[0083] Using the equally spaced liquid level indicator lights 15 as a reference, the pitch angle of the industrial camera 17 under constant gravity is calibrated to enable the industrial camera 17 to read the liquid level readings within a certain range on the liquid level tube 16. In the first liquid level switch module, the top liquid level indicator 15 is located at the top of the first liquid reservoir 1. The liquid level height of the top liquid level indicator 15 is denoted as the target liquid level height H. The liquid level heights of the second, third, and fourth liquid level indicator 15 from top to bottom in the first liquid level switch module are H-ΔH1, H-ΔH1-ΔH2, and H-ΔH1-ΔH2-ΔH3, respectively, where ΔH1 is the height difference between the first and second liquid level indicator 15, ΔH2 is the height difference between the second and third liquid level indicator 15, and ΔH3 is the height difference between the third and fourth liquid level indicator 15. In the second liquid level switch module, the liquid level heights of the first, second, and third liquid level indicator 15 from top to bottom are ΔH1+ΔH2+ΔH3, ΔH1+ΔH2, and ΔH1, respectively. One liquid level indicator 15 in the first liquid level switch module and one liquid level indicator 15 in the second liquid level switch module form a pair of liquid level indicator lights. The sum of the liquid level heights of the two liquid level indicator lights 15 in the same pair is H.

[0084] The flow monitoring system includes a flow pipe 7, a flow meter 9, and a first pneumatic ball valve 11; the output end of the first liquid reservoir 1 is connected to the input end of the second liquid reservoir 2 through the flow pipe 7. The flow meter 9 and the first pneumatic ball valve 11 are sequentially installed on the flow pipe 7 from the first liquid reservoir 1 to the second liquid reservoir 2. The gas input end of the first pneumatic ball valve 11 is connected to the air outlet 605 of the geotextile centrifuge 6. The air outlet 605 of the geotextile centrifuge 6 is used to provide a gas source.

[0085] The measuring device also includes two pressure sensors 14, which are fixedly connected inside the first liquid reservoir 1 and the second liquid reservoir 2, respectively, and the pressure sensors 14 are at the same height as the flow pipe 7. The pressure sensors 14, the flow meter 9 and the first pneumatic ball valve 11 are all connected to the control center 20, and the control center 20 is used to control the opening and closing degree of the first pneumatic ball valve 11, thereby controlling the fluid flow rate in the flow pipe 7.

[0086] The pumping system includes a pumping pipeline 8, a flow pump 10, and a second pneumatic ball valve 12. The output end of the second reservoir 2 is connected to the input end of the first reservoir 1 through the pumping pipeline 8. The second pneumatic ball valve 12 and the flow pump 10 are sequentially installed on the pumping pipeline 8 from the second reservoir 2 to the first reservoir 1. The gas input end of the second pneumatic ball valve 12 is connected to the air outlet 605 of the geotextile centrifuge 6, and the input end of the flow pump 10 is connected to the oil outlet 606 of the geotextile centrifuge 6. The oil outlet 606 of the geotextile centrifuge 6 is used to provide an oil source. The flow pump 10 and the second pneumatic ball valve 12 are both connected to the control center 20, and the control center 20 is used to control the opening and closing degree of the second pneumatic ball valve 12, thereby controlling the fluid flow rate in the pumping pipeline 8.

[0087] The output and input ends of the first liquid reservoir 1 are respectively located at the bottom and bottom surface of the side wall of the first liquid reservoir 1; the input and output ends of the second liquid reservoir 2 are respectively located at the bottom and bottom surface of the side wall of the second liquid reservoir 2. Since the suspension of the pipeline under hypergravity poses a danger, it is necessary to consider whether to add supports based on the actual flow rate and length of the pipeline 7 and pumping pipeline 8.

[0088] As shown in Figure 4, the oil outlet 606 of the geotextile centrifuge 6 is connected to the input end of the flow pump 10 through the main pipeline. From the oil outlet 606 to the main pipeline of the flow pump, there are in sequence an electromagnetic ball valve 21, a pressure reducing valve 22, a reversing valve 23, a proportional speed regulating valve 24, a pressure sensor 25, and a gear flow meter 26. The main pipeline is set on the rotating arm 604 of the geotextile centrifuge 6. The oil outlet 606 of the geotextile centrifuge 6 is also directly connected to the oil inlet end of the flow pump 10 through a secondary pipeline. The electromagnetic ball valve 21, pressure reducing valve 22, reversing valve 23, and proportional speed regulating valve 24 are all used to regulate the hydraulic flow on the pipeline. The pressure sensor 25 is used to measure the magnitude of the input hydraulic pressure, and the gear flow meter 26 is used to measure the magnitude of the input hydraulic oil flow.

[0089] A method for measuring fluid flow rate and pressure under hypergravity conditions includes the following steps:

[0090] First, the airtightness of the apparatus was tested under constant gravity:

[0091] Step 1: Under constant gravity, inject clean water into the first liquid reservoir 1 to the target liquid level height H, where the target liquid level height H is the height of the top liquid level indicator 15 in the first liquid level switch module. When the top liquid level indicator 15 in the first liquid level switch module lights up, stop injecting water.

[0092] Step 2: Open the first pneumatic ball valve 11, so that the liquid in the first reservoir 1 flows to the second reservoir 2 through the flow pipe 7. When the liquid levels in the first reservoir 1 and the second reservoir 2 are equal, the liquid stops flowing. At this time, close the first pneumatic ball valve 11 and open the second pneumatic ball valve 12. Use the flow pump 10 to pump the water in the second reservoir 2 back into the first reservoir 1. After all the water has been pumped back into the first reservoir 1, close the second pneumatic ball valve 12 and start the first pneumatic ball valve 11.

[0093] Step 3: Repeat Step 2 above multiple times to achieve water circulation between the first reservoir 1 and the second reservoir 2, in order to test the sealing performance of the first reservoir 1, the second reservoir 2, the flow pipe 7, and the pumping pipe 8.

[0094] Step 4: In addition, the response time and accuracy of the liquid level sensor 13, liquid level switch 15, liquid level tube 16, industrial camera 17, flow meter 9, first pneumatic ball valve 11, flow pump 10 and second pneumatic ball valve 12 are tested.

[0095] Once the airtightness and precision of each component in the device meet the preset requirements, the next step, loading test under hypergravity environment, will begin.

[0096] Step S1: Use a crane to hoist the entire measuring device into the second basket 603 of the geotextile centrifuge 6. Then, inject clean water into the first liquid reservoir 1 to the target liquid level height H. At this time, the liquid level height of the second liquid reservoir 2 is 0. Connect the liquid level monitoring system, flow monitoring system and pumping system to the control center 20.

[0097] Step S2: Start the geotechnical centrifuge 6 and open the first pneumatic ball valve 11 under hypergravity environment to allow the liquid in the first liquid reservoir 1 to flow to the second liquid reservoir 2. At the same time, the liquid level indicator 15 and the liquid level sensor 13 are tested for compliance during the liquid flow.

[0098] Step S3: When the liquid levels in the first reservoir 1 and the second reservoir 2 are equal, the liquid stops flowing. At this point, the liquid levels in both reservoirs are H / 2. Then, the first pneumatic ball valve 11 is closed and the second pneumatic ball valve 12 is opened. The water in the second reservoir 2 is pumped back into the first reservoir 1 by the flow pump 10. Simultaneously, the flow pump 10 is tested for compliance during the liquid pumping process.

[0099] If the test result of flow pump 10 is qualified, proceed to step S4;

[0100] Otherwise, stop the experiment, replace the defective flow pump 10, and repeat step S3 until the test conditions are met.

[0101] Step S4: Open the first pneumatic ball valve 11 to allow the liquid in the first liquid reservoir 1 to flow to the second liquid reservoir 2, and at the same time perform a qualification test on the flow meter 9 and the pressure sensor 14 during the liquid flow process.

[0102] If the test results of flow meter 9 and pressure sensor 14 are qualified, proceed to step S5;

[0103] Otherwise, stop the experiment, replace the unqualified flow meter 9 or pressure sensor 14, and repeat step S4 until the test conditions are met.

[0104] Step S5: When the liquid levels in the first reservoir 1 and the second reservoir 2 are equal, the liquid stops flowing. At this time, the first pneumatic ball valve 11 is closed and the second pneumatic ball valve 12 is opened. The water in the second reservoir 2 is pumped back into the first reservoir 1 by the flow pump 10. After all the water has been pumped back into the first reservoir 1, the second pneumatic ball valve 12 is closed and the first pneumatic ball valve 11 is started.

[0105] Step S6: Repeat step S5 above multiple times to achieve liquid circulation between the first liquid reservoir 1 and the second liquid reservoir 2. During the liquid circulation, the pressure sensor 14, gear flow meter 26, and flow meter 9 are used to collect the liquid pressure, the pumping flow rate of the flow pump 10, and the flow rate of the liquid under the action of the water head in real time.

[0106] Specifically, step S2 is as follows:

[0107] Step S2.1: Start the geotextile centrifuge 6 and gradually increase the centrifugal acceleration of the geotextile centrifuge 6 to the preset Ng. After the centrifugal acceleration stabilizes for 15 minutes, open the first pneumatic ball valve 11. Under the action of the head difference, the liquid in the first liquid reservoir 1 flows to the second liquid reservoir 2 through the flow pipe 7. At the same time, the liquid level indicator light 15 and the liquid level sensor 13 are tested for compliance during the liquid flow process.

[0108] The specific method for passing the qualification test of the liquid level indicator 15 in step S2.1 is as follows: During the liquid flow process, the liquid level indicator 15 is tested by reading the value of the transparent liquid level tube 16 at the same height as the industrial camera 17 using an industrial camera 17.

[0109] If the liquid level corresponding to the on / off state of the liquid level indicator 15 is consistent with the liquid level in the liquid level tube 16, it indicates that the liquid level indicator 15 is qualified.

[0110] Otherwise, it indicates that the liquid level indicator light 15 is defective;

[0111] Specifically, when the liquid reaches the height of the level switch 15, the corresponding level indicator 15 is lit; otherwise, the level indicator 15 is off. Therefore, the liquid level can be determined by the on / off state of the level indicator 15. The on / off state of the level indicator 15 and the liquid level in the level tube 16 are collected by the industrial camera 17 and then compared to determine whether the level indicator 15 is qualified.

[0112] If the liquid level in the level tube 16 reaches the height of the level indicator light 15, the level indicator light 15 will light up; and if the liquid level in the level tube 16 does not reach the height of the level indicator light 15, the level indicator light 15 will turn off, indicating that the level indicator light 15 is qualified.

[0113] Otherwise, it indicates that the liquid level indicator light 15 is not qualified.

[0114] The specific method for performing a qualification test on the liquid level sensor 13 in step S2.1 is as follows: During liquid flow, the liquid level sensor 13 is tested for qualification by using the reading on the transparent liquid level tube 16.

[0115] If the reading of the liquid level sensor 13 matches the liquid level in the liquid level tube 16, it indicates that the liquid level sensor 13 is qualified.

[0116] Otherwise, it indicates that the liquid level sensor 13 is defective;

[0117] Step S2.2: Determine the qualification of the liquid level switch module. The seven liquid level indicator lights 15 in a qualified liquid level switch module meet the following conditions:

[0118] 1. The liquid level indicator light 15 on the top of the first liquid level switch module is qualified;

[0119] 2. The first liquid level indicator light 15 from bottom to top of the first liquid level switch module is qualified or the first liquid level indicator light 15 from top to bottom of the second liquid level switch module is qualified.

[0120] 3. The second liquid level indicator 15 from bottom to top of the first liquid level switch module is qualified or the second liquid level indicator 15 from top to bottom of the second liquid level switch module is qualified;

[0121] IV. The third liquid level indicator light 15 from the bottom of the first liquid level switch module is qualified, or the third liquid level indicator light 15 from the top of the second liquid level switch module is qualified.

[0122] If the seven liquid level indicator lights 15 in the liquid level switch module meet the above four conditions, it indicates that the liquid level switch module has passed the test; otherwise, it indicates that the liquid level switch module has failed the test.

[0123] The liquid level switch module includes a first liquid level switch module and a second liquid level switch module.

[0124] Step S2.3: If at least one of the liquid level switch module and the liquid level sensor 13 passes the test, proceed to step S3.

[0125] Otherwise, stop the experiment, replace the unqualified level sensor 13 / level indicator light 15, and repeat steps S2.1 to S2.2 until the test conditions are met.

[0126] The specific method for performing a qualification test on the flow pump 10 during the liquid pumping process in step S3 is as follows:

[0127] Step S3.1: Open the solenoid ball valve 21, pressure reducing valve 22 and reversing valve 23, and adjust the proportional speed control valve 24 so that the reading of the gear flow meter 26 reaches the preset pumping hydraulic flow value.

[0128] Step S3.2: Record the moment when the second pneumatic ball valve 12 is opened as the start time T1, and record the moment when the liquid level in the first reservoir 1 reaches the target liquid level H as the end time T2. At the end time, all the liquid is pumped back into the first reservoir 1. Close the second pneumatic ball valve 12 and obtain the theoretical pumping hydraulic flow rate Q according to the following formula:

[0129] Where A is the cross-sectional area of ​​the first liquid reservoir 1;

[0130] Step S3.2: Then, compare the theoretical pumped hydraulic flow rate Q with the reading of the gear flow meter 26:

[0131] If the error between the reading of gear flow meter 26 and the theoretical pumped hydraulic flow rate Q is within ±5%, it indicates that the flow pump 10 is qualified during the liquid pumping process.

[0132] Otherwise, it indicates that the flow pump 10 is unqualified.

[0133] The specific method for performing a qualification test on the pressure sensor 14 in step S4 is as follows:

[0134] First, the theoretical pressure value P of the liquid is obtained using the following formula. h :

[0135] In the formula, P h The theoretical pressure of the liquid at a liquid level height of h is represented by ρ; the liquid density is represented by ω; the rotational angular velocity of the geocentrifuge is represented by R. max H1 is the distance from the center of the shaft of the geotextile centrifuge 6 to the bottom surface of the second basket 603; h is the liquid level height, which is obtained by observing the real-time liquid level in the transparent liquid level tube 16; H1 is the distance from the pressure sensor 14 to the bottom surface of the liquid storage tanks 1 and 2; H2 is the distance from the bottom surface of the liquid storage tanks 1 and 2 to the bottom surface of the second basket 603.

[0136] Then the theoretical pressure value P of the liquid h Compare the readings with those of the same liquid level and pressure sensor 14:

[0137] If the reading of pressure sensor 14 is different from the theoretical pressure value P h If the error is within ±5%, it indicates that the pressure sensor 14 is qualified;

[0138] Otherwise, it indicates that the pressure sensor 14 is defective.

[0139] Step S4 involves a qualification test on the flow meter 9, which can be performed in two ways:

[0140] Method 1: If the liquid level switch module passes the test in step S2.2, use the liquid level indicator light 15 to perform a pass / fail test on the flow meter 9:

[0141] Step S4.1: Start timing from opening the first pneumatic ball valve 11, and record the reading of the flow meter 9 every 1 second. When the liquid level of the first reservoir 1 changes to the height of each qualified liquid level indicator 15 in the liquid level switch module, record the corresponding liquid level change time difference Δt. i (i = 1, 2, 3), and obtain the theoretical flow rate Q' according to the following formula:

[0142] Wherein, Δt1 represents the time required for the liquid level of the first reservoir 1 to drop by a height of ΔH1; Δt2 represents the time required for the liquid level of the first reservoir 1 to drop by a height of ΔH2; Δt3 represents the time required for the liquid level of the first reservoir 1 to drop by a height of ΔH3; ΔH1 represents the height difference between the first and second liquid level indicator lights 15 from top to bottom on the first liquid level switch module; ΔH2 represents the height difference between the second and third liquid level indicator lights 15 from top to bottom on the first liquid level switch module; ΔH3 represents the height difference between the third and fourth liquid level indicator lights 15 from top to bottom on the first liquid level switch module.

[0143] Specifically, Δt1 represents the liquid level of the first reservoir 1, the time required for the liquid level indicator 15 of the first liquid level switch module to drop from the first liquid level indicator 15 to the second liquid level indicator 15; Δt2 represents the liquid level of the first reservoir 1, the time required for the liquid level indicator 15 of the first liquid level switch module to drop from the second liquid level indicator 15 to the third liquid level indicator 15; Δt3 represents the liquid level of the first reservoir 1, the time required for the liquid level indicator 15 of the first liquid level switch module to drop from the third liquid level indicator 15 to the fourth liquid level indicator 15.

[0144] Step S4.2: Then, compare the theoretical flow rate Q' with the reading of flow meter 9:

[0145] If the error between the reading of flow meter 9 and the theoretical flow rate Q' is within ±5%, it indicates that flow meter 9 is qualified.

[0146] Otherwise, it indicates that the flow meter 9 is unqualified;

[0147] Method 2: If the liquid level sensor 13 passes the test in step S2.1, use the liquid level sensor 13 to perform a pass / fail test on the flow meter 9:

[0148] Step S4.1: Start timing from the opening of the first pneumatic ball valve 11, obtain the change in the reading of the liquid level sensor 13 within a random time period δt, and obtain the theoretical flow rate Q' according to the following formula:

[0149] Among them, H δt This represents the difference in readings of level sensor 13 over the time interval δt;

[0150] Step S4.2: Then, compare the theoretical flow rate Q' with the reading of flow meter 9:

[0151] If the error between the reading of flow meter 9 and the theoretical flow rate Q' is within ±5%, it indicates that flow meter 9 is qualified.

[0152] Otherwise, it indicates that the flow meter 9 is unqualified.

[0153] If both the level sensor 13 and the level switch module are qualified, the judgment result of the level sensor 13 on the flow meter 9 shall prevail.

[0154] Those skilled in the art can readily make various changes and modifications based on the provided textual description, drawings, and claims, without departing from the spirit and scope of the invention as defined by the claims. Any modifications or equivalent variations made to the above embodiments based on the technical concept and essence of the invention fall within the protection scope defined by the claims of this invention.

Claims

1. A device for measuring fluid flow rate and pressure under hypergravity conditions, characterized in that: It includes a first liquid reservoir (1), a second liquid reservoir (2), a liquid level monitoring system, a flow monitoring system, and a pumping system; both the first liquid reservoir (1) and the second liquid reservoir (2) are equipped with a liquid level monitoring system. The output end of the first liquid reservoir (1) is connected to the input end of the second liquid reservoir (2) through the flow monitoring system. The output end of the second liquid reservoir (2) is connected to the input end of the first liquid reservoir (1) through the pumping system. The first liquid reservoir (1), the second liquid reservoir (2), and the liquid level monitoring system are all fixedly connected to the base plate (3). The base plate (3) is placed on the basket of the geotechnical centrifuge (6). The liquid level monitoring system, the flow monitoring system, and the pumping system are all electrically connected to the external control center (20).

2. The device for measuring fluid flow rate and pressure under hypergravity environment according to claim 1, characterized in that: The liquid level monitoring system includes a liquid level sensor (13), a first liquid level switch module, a second liquid level switch module, two liquid level tubes (16), and seven industrial cameras (17). The liquid level sensor (13) is installed on the inner wall of the first liquid reservoir (1) to measure the liquid level in the first liquid reservoir (1) in real time. The two liquid level tubes (16) are respectively installed vertically on the side walls of the first liquid reservoir (1) and the second liquid reservoir (2) to observe the changes in the liquid level in the first liquid reservoir (1) and the second liquid reservoir (2). The first liquid level switch module and the second liquid level switch module... The blocks are respectively installed on the side walls of the first liquid reservoir (1) and the second liquid reservoir (2). The first liquid level switch module mainly consists of four vertically spaced liquid level indicator lights (15), and the second liquid level switch module mainly consists of three vertically spaced liquid level indicator lights (15). Seven industrial cameras (17) are fixedly connected to the base plate (3) through the bracket (4). The seven industrial cameras (17) are used to acquire the on / off state of the seven liquid level indicator lights (15). The liquid level sensor (13) and the industrial cameras (17) are both electrically connected to the control center (20).

3. The device for measuring fluid flow rate and pressure under hypergravity environment according to claim 1, characterized in that: The flow monitoring system includes a flow pipe (7), a flow meter (9), and a first pneumatic ball valve (11); the output end of the first liquid reservoir (1) is connected to the input end of the second liquid reservoir (2) through the flow pipe (7), and the flow meter (9) and the first pneumatic ball valve (11) are sequentially installed on the flow pipe (7) from the first liquid reservoir (1) to the second liquid reservoir (2), and the gas input end of the first pneumatic ball valve (11) is connected to the air outlet (605) of the geotextile centrifuge (6); The measuring device also includes two pressure sensors (14), which are fixedly connected inside the first liquid reservoir (1) and the second liquid reservoir (2), respectively, and the pressure sensors (14) are at the same height as the flow pipe (7); the pressure sensors (14), the flow meter (9), and the first pneumatic ball valve (11) are all connected to the control center (20), and the control center (20) is used to control the first pneumatic ball valve (11). The degree of opening and closing is used to control the fluid flow rate in the flow pipe (7).

4. The device for measuring fluid flow rate and pressure under hypergravity environment according to claim 1, characterized in that: The pumping system includes a pumping pipe (8), a flow pump (10), and a second pneumatic ball valve (12). The output end of the second reservoir (2) is connected to the input end of the first reservoir (1) through the pumping pipe (8). The second pneumatic ball valve (12) and the flow pump (10) are sequentially installed on the pumping pipe (8) from the second reservoir (2) to the first reservoir (1). The gas input end of the second pneumatic ball valve (12) is connected to the air outlet (605) of the geotextile centrifuge (6). The input end of the flow pump (10) is connected to the oil outlet (606) of the geotextile centrifuge (6). The flow pump (10) and the second pneumatic ball valve (12) are both connected to the control center (20). The control center (20) is used to control the opening and closing degree of the second pneumatic ball valve (12), thereby controlling the fluid flow rate in the pumping pipe (8).

5. The device for measuring fluid flow rate and pressure under hypergravity environment according to claim 1, characterized in that: The oil outlet (606) of the geotextile centrifuge (6) is connected to the input end of the flow pump (10) through the main pipeline. From the oil outlet (606) to the main pipeline of the flow pump, there are in sequence an electromagnetic ball valve (21), a pressure reducing valve (22), a reversing valve (23), a proportional speed regulating valve (24), a pressure sensor (25), and a gear flow meter (26). The oil outlet (606) of the geotextile centrifuge (6) is also directly connected to the oil inlet of the flow pump (10) through a secondary pipeline.

6. A method for measuring fluid flow rate and pressure under hypergravity conditions using the device described in any one of claims 1-5, characterized in that, Includes the following steps: Step S1: Use a crane to hoist the measuring device into the second basket (603) of the geotechnical centrifuge (6), then inject clean water into the first liquid reservoir (1) to the target liquid level height H, and connect the liquid level monitoring system, flow monitoring system and pumping system to the control center (20); Step S2: Start the geotechnical centrifuge (6), open the first pneumatic ball valve (11) under hypergravity environment, so that the liquid in the first liquid reservoir (1) flows to the second liquid reservoir (2), and at the same time, the liquid level indicator (15) and liquid level sensor (13) are tested for compliance during the liquid flow process. Step S3: When the liquid levels in the first reservoir (1) and the second reservoir (2) are equal, the liquid stops flowing. At this time, the first pneumatic ball valve (11) is closed and the second pneumatic ball valve (12) is opened. The water in the second reservoir (2) is pumped back to the first reservoir (1) by the flow pump (10). At the same time, the flow pump (10) is tested for compliance during the liquid pumping process. If the test result of the flow pump (10) is qualified, then proceed to step S4; Otherwise, stop the experiment, replace the unqualified flow pump (10), and repeat step S3 until the test conditions are met; Step S4: Open the first pneumatic ball valve (11) to allow the liquid in the first reservoir (1) to flow to the second reservoir (2), and simultaneously, during the liquid flow process, the flow meter (9) and pressure sensor (14) are activated. Conduct qualified testing; If the test results of the flow meter (9) and the pressure sensor (14) are qualified, then proceed to step S5; Otherwise, stop the experiment, replace the unqualified flow meter (9) or pressure sensor (14), and repeat step S4 until the test conditions are met; Step S5: When the liquid levels in the first reservoir (1) and the second reservoir (2) are equal, the liquid stops flowing. At this time, close the first pneumatic ball valve (11) and open the second pneumatic ball valve (12). Use the flow pump (10) to pump the water in the second reservoir (2) back into the first reservoir (1). After all the water has been pumped back into the first reservoir (1), close the second pneumatic ball valve (12) and start the first pneumatic ball valve (11). Step S6: Repeat step S5 above multiple times to achieve liquid circulation between the first liquid reservoir (1) and the second liquid reservoir (2). During the liquid circulation, the pressure sensor (14), gear flow meter (26), and flow meter (9) are used to obtain the liquid pressure, the pumping flow of the flow pump (10), and the flow rate of the liquid under the action of the water head in real time.

7. The method for measuring fluid flow rate and pressure under hypergravity conditions according to claim 6, characterized in that: The specific steps of step S2 are as follows: Step S2.1: Start the geotextile centrifuge (6) and gradually increase the centrifugal acceleration of the geotextile centrifuge (6) to the preset Ng. When the centrifugal acceleration is stable, open the first pneumatic ball valve (11). Under the action of the head difference, the liquid in the first reservoir (1) flows to the second reservoir (2) through the flow pipe (7). At the same time, the liquid level indicator (15) and liquid level sensor (13) are tested for compliance during the liquid flow process. The specific method for passing the qualification test of the liquid level indicator (15) in step S2.1 is as follows: During the liquid flow process, the liquid level indicator (15) is tested for qualification by using the transparent liquid level tube (16) to display the reading: If the liquid level corresponding to the on / off state of the liquid level indicator (15) is consistent with the liquid level in the liquid level tube (16), it indicates that the liquid level indicator (15) is qualified. Otherwise, it indicates that the liquid level indicator (15) is not qualified; The specific method for performing a qualification test on the liquid level sensor (13) in step S2.1 is as follows: During the liquid flow process, the liquid level sensor (13) is tested for qualification by using the reading on the transparent liquid level tube (16): If the reading of the liquid level sensor (13) matches the liquid level in the liquid level tube (16), it indicates that the liquid level sensor (13) is qualified. Otherwise, it indicates that the liquid level sensor (13) is unqualified; Step S2.2: Determine the qualification of the liquid level switch module. The seven liquid level indicator lights (15) in a qualified liquid level switch module meet the following conditions: The liquid level indicator light (15) on the top of the first liquid level switch module is qualified; The first liquid level switch module, from bottom to top, shows either the first liquid level indicator light (15) indicating a qualified level or the second liquid level switch... The first liquid level indicator (15) from top to bottom of the module is qualified; The second liquid level indicator (15) from bottom to top of the first liquid level switch module is qualified or the second liquid level indicator (15) from top to bottom of the second liquid level switch module is qualified; The third liquid level indicator (15) from bottom to top of the first liquid level switch module is qualified or the third liquid level indicator (15) from top to bottom of the second liquid level switch module is qualified; If the seven liquid level indicator lights (15) in the liquid level switch module meet the above four conditions, it indicates that the liquid level switch module has passed the test; otherwise, it indicates that the liquid level switch module has failed the test. Step S2.3: If at least one of the liquid level switch module and the liquid level sensor (13) passes the test, then proceed to step S3. Otherwise, stop the experiment, replace the unqualified level sensor (13) / level indicator (15), and repeat steps S2.1 to S2.2 until the test conditions are met.

8. The method for measuring fluid flow rate and pressure under hypergravity conditions according to claim 6, characterized in that: The specific method for performing a qualification test on the flow pump (10) in step S3 during the liquid pumping process is as follows: Step S3.1: Open the solenoid ball valve (21), pressure reducing valve (22) and reversing valve (23), and adjust the proportional speed control valve (24) so ​​that the reading of the gear flow meter (26) reaches the preset pumping hydraulic flow value. Step S3.2: Record the moment when the second pneumatic ball valve (12) is opened as the start time T1, and record the moment when the liquid level in the first reservoir (1) reaches the target liquid level H as the end time T2. Close the second pneumatic ball valve (12) and obtain the theoretical pumping hydraulic flow rate Q: Step S3.2: Then, compare the theoretical pumped hydraulic flow rate Q with the reading of the gear flow meter (26): If the error between the reading of the gear flow meter (26) and the theoretical pumped hydraulic flow rate Q is within ±5%, it indicates that the flow pump (10) is qualified during the liquid pumping process. Otherwise, it indicates that the flow pump (10) is unqualified.

9. The method for measuring fluid flow rate and pressure under hypergravity conditions according to claim 6, characterized in that: The specific method for performing a qualification test on the pressure sensor (14) in step S4 is as follows: First, the theoretical pressure value P of the liquid is obtained. h : Then the theoretical pressure value P of the liquid h Compare with the readings of the same liquid level pressure sensor (14): If the reading of pressure sensor (14) is different from the theoretical pressure value P h If the error between the two is within ±5%, it indicates that the pressure sensor (14) is qualified; Otherwise, it indicates that the pressure sensor (14) is unqualified.

10. The method for measuring fluid flow rate and pressure under hypergravity conditions according to claim 6, characterized in that: The specific method for performing the qualification test on the flow meter (9) in step S4 is as follows: If the liquid level switch module passes the test in step S2.2, the flow meter (9) is tested for compliance using the liquid level indicator light (15). Step S4.1: Start timing from opening the first pneumatic ball valve (11), and record the reading of the flow meter (9) every 1 second. When the liquid level of the first reservoir (1) changes to the height of each qualified liquid level indicator (15) in the liquid level switch module, record the corresponding liquid level change time difference Δt. i (i = 1, 2, 3), and obtain the theoretical flow rate Q' based on the time difference of liquid level change: Step S4.2: Then, compare the theoretical flow rate Q' with the reading of the flow meter (9): If the error between the reading of the flow meter (9) and the theoretical flow rate Q' is within ±5%, it indicates that the flow meter (9) is qualified. Otherwise, it indicates that the flow meter (9) is unqualified; If the liquid level sensor (13) passes the test in step S2.1, the flow meter (9) is tested for compliance using the liquid level sensor (13): Step S4.1: Start timing from the opening of the first pneumatic ball valve (11), obtain the change in the reading of the liquid level sensor (13) within a random time period δt, and obtain the theoretical flow rate Q' based on the change in the reading of the liquid level sensor (13): Step S4.2: Then, compare the theoretical flow rate Q' with the reading of the flow meter (9): If the error between the reading of the flow meter (9) and the theoretical flow rate Q' is within ±5%, it indicates that the flow meter (9) is qualified. Otherwise, it indicates that the flow meter (9) is unqualified.

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