A test system and method for evaluating foaming agent performance based on force sensor

Abstract

The present invention relates to a test system and method for evaluating foaming agent performance based on a force sensor. This system, which belongs to the technical field of flotation agent evaluation methods, addresses the inaccurate and labor-intensive foam state evaluation methods of existing technologies. The system comprises a feeding device, an aeration device, a force sensor testing device, and a data acquisition device. The feeding device is used to deliver the test agent to the force sensor testing device, the aeration device is used to deliver gas to the force sensor testing device, and the data acquisition device is used to collect and record data generated by the force sensor testing device. This system provides more accurate guidance for evaluating foaming agent performance.

Description

Technical Field

[0001] The present invention relates to the technical field of flotation agent evaluation methods, and in particular to a test system and method for evaluating foaming agent performance based on a force sensor. Background Art

[0002] Coal is one of my country's primary energy sources and is crucial to the development of the national economy. Its position in my country's energy structure will remain unchanged for a long time to come. With the increasing mechanization of coal mining and the maturity of heavy medium separation technology for lump coal, coal separation has developed characteristics such as fineness and high ash content, leading to technical issues such as weak slime recovery and substandard quality. The difficulty of separating coal slime has become a common concern in the industry and a pressing issue that needs to be addressed. In recent years, flotation technology has increasingly demonstrated its strong advantages in separating (micro)fine coal particles, playing a significant role in resolving this issue.

[0003] Froth flotation selectively separates target minerals from gangue based on differences in the physical and chemical properties of mineral surfaces. During the flotation process, as the hydration film between bubble particles thins and ruptures, particles collide with bubbles. Hydrophobic particles tend to adhere to these bubbles, forming mineralized bubbles that rise to the froth phase and are discharged as concentrate, while hydrophilic particles remain in the slurry and eventually sink to the bottom as tailings. The particle-bubble mineralization process is a core step in flotation, and therefore, the formation and stability of the froth directly impact flotation performance.

[0004] Foamability and stability are two important indicators for evaluating froth and, to a certain extent, can predict flotation results. Foamability refers to the rate of froth growth and the amount of froth generated; foam stability refers to the ability of the froth to maintain its original state, that is, the ease with which bubbles merge and burst. When the froth layer is unstable, bubbles are more likely to merge and burst, resulting in a decrease in flotation yield. However, an overly stable froth layer can complicate concentrate dewatering operations. Therefore, both an unstable and overly stable froth layer are detrimental to flotation. In recent years, scholars both domestically and internationally have conducted extensive research on froth properties.

[0005] In the past, the main method for testing macroscopic foam layer stability was the airflow method. This method typically employed a combination of dynamic and static methods, with evaluation metrics such as the maximum foam layer height and the foam (half-)life. This method relied primarily on visual observation by the tester. This traditional method increased the workload and resulted in significant errors. Therefore, the development of a testing method and system with real-time and high-precision recording was crucial. Summary of the Invention

[0006] In view of the above analysis, the embodiments of the present invention aim to provide a testing system and method for evaluating foaming agent performance based on a force sensor, so as to solve the problems of inaccurate and labor-intensive existing foam state evaluation methods, thereby providing more accurate guidance for evaluating foaming agent performance.

[0007] On the one hand, the present invention provides a test system for evaluating the performance of a foaming agent based on a force sensor, comprising a feeding device, an inflation device, a force sensor testing device and a data acquisition device; the feeding device is used to deliver the agent to be tested to the force sensor testing device, the inflation device is used to deliver gas to the force sensor testing device, and the data acquisition device is used to collect and record data generated by the force sensor testing device.

[0008] Furthermore, the force sensor testing device includes an aerated flotation column, a force sensor and a displacement movable device, the force sensor is located inside the aerated flotation column, the displacement movable device is connected to the inner wall of the aerated flotation column, and one end of the force sensor is connected to the displacement movable device.

[0009] Furthermore, there are two force sensors, and the two force sensors are at the same horizontal height.

[0010] Furthermore, the force sensor can move up and down on the inner wall surface of the air flotation column along the movable displacement device.

[0011] Furthermore, a porous sand core and an air chamber are provided in the aerated flotation column, the air chamber is located below the porous sand core, and the porous sand core is provided at the lower part of the aerated flotation column.

[0012] Furthermore, the feeding device includes a foaming agent pre-dispersion device, a flow guide pipe, a valve, a peristaltic pump and a feeding pipe which are connected in sequence.

[0013] Furthermore, the aerated flotation column is also provided with a feed port, an air inlet and a discharge port. The feed port is located at the upper middle position of the wall of the aerated flotation column and is connected to the feed pipe. The air inlet is located at the lower position of the wall of the aerated flotation column and is connected to the air chamber. The discharge port is located in the area where the porous sand core is located and is connected to the discharge pipe.

[0014] Furthermore, the inflation device includes an air pump, a gas flow meter and an inflation tube connected in sequence; one end of the inflation tube is connected to the air inlet.

[0015] Furthermore, the data acquisition device includes a signal amplifier, a data acquisition card and a computer. The signal amplifier is connected to the force sensor via a wire, the data acquisition card is connected to the signal amplifier via a wire, and the computer is connected to the data acquisition card.

[0016] In another aspect, the present invention provides a method for evaluating the performance of a foaming agent based on a force sensor, using the above-mentioned testing system for evaluating the performance of a foaming agent based on a force sensor, the steps comprising:

[0017] Step 1: Place weights of different masses on the force sensor, record the changes in the voltage signal generated by the test, and determine the corresponding linear relationship between the measured voltage signal and the weight of the weight to create a corresponding standard curve;

[0018] Step 2: Turn on the peristaltic pump head and inject the pre-configured uniform foaming agent solution into the aerated flotation column through the feed pipe;

[0019] Step 3: Turn on the air pump and gas flow meter to generate bubbles in the aerated flotation column;

[0020] Step 4: Recording of force signals during foam growth;

[0021] During the process of bubble generation, the bubbles continuously float up in the liquid and form a foam layer on the top. The force sensor inside the aerated flotation column will be subjected to an upward force, and the electrical signal is recorded by the data acquisition device.

[0022] Step 5: When the foam layer is highly stable, turn off the air pump and gas flow meter, and the bubbles begin to merge and burst;

[0023] Step 6: Recording of force signals during the foam decay process;

[0024] During the decay process, due to the merging of bubbles, the foam layer gradually decreases, and the force sensor inside the aerated flotation column will be subjected to a downward force, wherein the electrical signal is recorded by the data acquisition device;

[0025] Step 7: Place the force sensor in the tested foaming agent solution;

[0026] Step 8: Place weights of different masses on the force sensor, record the changes in the voltage signal generated by the test, and determine the corresponding linear relationship between the measured voltage signal and the weight of the weight to create a corresponding standard curve;

[0027] Step 9: Turn on the air pump and gas flow meter and set the air speed;

[0028] Step 10: Recording of force signal of gas holdup;

[0029] During the inflation process, bubbles are generated inside the liquid, which will generate electrical signals for the force sensor placed in the liquid. The electrical signals are recorded through the data acquisition device.

[0030] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0031] (1) The present invention can record experimental data through a force sensor and obtain a force curve through signal conversion processing. From the force curve, the changing trends of foam growth rate, growth capacity, water carrying capacity, decay capacity, drainage capacity and gas content can be qualitatively analyzed. That is, the idea of ​​micro-nanomechanics is used to realize the multifunctional and multi-index integration of foam evaluation indicators.

[0032] (2) The present invention can relatively reduce the workload of test personnel and avoid minor differences generated during the test process from not being observed and recorded. The data monitored and recorded by this method can well correspond to the test process, realizing real-time and accurate recording of test data, facilitating subsequent analysis and making qualitative evaluations of the foaming agent performance.

[0033] (3) The present invention solves the problem of inaccurate and time-consuming evaluation of foam status by test personnel, thereby providing more accurate guidance for evaluating the performance of foaming agents.

[0034] (4) The present invention sets a movable displacement component in the air flotation column, so that the force sensor can be flexibly moved up and down in the column, which can meet the changes in different test conditions and requirements and improve the test efficiency.

[0035] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following description, and some advantages will become apparent from the description or be learned through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0037] Figure 1 Schematic diagram of the structure of the testing system for evaluating the performance of the foaming agent of the present invention;

[0038] Figure 2 is a schematic diagram of the force sensor structure of the present invention;

[0039] Figure 3 Schematic diagram of the force sensor testing device structure of the present invention;

[0040] Figure 4 It is a schematic diagram of the connection structure between the force sensor and the slider of the present invention.

[0041] Reference numerals:

[0042] 1-feeding device; 11-pre-dispersion device; 12-flow guide tube; 13-valve; 14-peristaltic pump; 15-feeding pipe; 2-inflating device; 21-air pump; 22-gas flow meter; 23-inflating pipe; 3-force sensor testing device; 31-inflated flotation column; 311-feeding port; 312-air inlet; 313-discharge port; 314-porous sand core; 315-air chamber; 32-force sensor; 33-displacement movable device; 331-sliding groove; 332-sliding block; 333-displacement control bolt; 4-data acquisition device; 41-signal amplifier; 42-data acquisition card; 43-computer. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0044] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the term "connected" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection. It can also mean a mechanical connection or an electrical connection. It can also mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The terms "top," "bottom," "above," "below," and "on" used throughout the description refer to relative positions of components of a device, such as the relative positions of top and bottom substrates within a device. It will be understood that devices are multifunctional regardless of their orientation in space.

[0046] Example 1

[0047] A specific embodiment of the present invention, as Figure 1-Figure 2 As shown, a test system for evaluating the performance of a foaming agent based on a force sensor is disclosed, comprising a feeding device 1, an inflation device 2, a force sensor testing device 3, and a data acquisition device 4. The feeding device 1 is connected to the force sensor testing device 3, the inflation device 2 is connected to the force sensor testing device 3, and the force sensor testing device 3 is electrically connected to the data acquisition device 4. The feeding device 1 is used to deliver the test agent to the force sensor testing device 3, the inflation device 2 is used to deliver gas to the force sensor testing device 3, and the data acquisition device 4 is used to collect and record data generated by the force sensor testing device 3.

[0048] Compared with traditional testing devices, the testing system for evaluating the performance of foaming agents in this embodiment adopts the concept of micro-nanomechanics and applies force sensors to the testing system for evaluating the performance of foaming agents. This can relatively reduce the workload of test personnel and avoid minor differences generated during the test process from not being observed and recorded. The data monitored and recorded by the device can well correspond to the test process, realizing real-time and accurate recording of test data, facilitating subsequent analysis and making qualitative evaluations of the foaming agent performance.

[0049] The force sensor testing device 3 includes an aerated flotation column 31, which is provided with a porous sand core 314 and an air chamber 315. The air chamber 315 is located below the porous sand core 314. Specifically, the porous sand core 314 is located at the bottom of the aerated flotation column 31. The space between the porous sand core 314 and the bottom of the aerated flotation column 31 is the air chamber 315, which is used to generate bubbles.

[0050] The aerated flotation column 31 is also provided with a feed port 311, an air inlet 312 and a discharge port 313. The feed port 311 is arranged at the upper middle position of the wall of the aerated flotation column 31 and is connected to the feed pipe 15. The air inlet 312 is arranged at the lower position of the wall of the aerated flotation column 31 and is connected to the air chamber 315. The discharge port 313 is arranged in the area where the porous sand core 314 is located and is connected to the discharge pipe.

[0051] The force sensor testing device 3 also includes a force sensor 32 and a displacement movable device 33. The force sensor 32 is arranged inside the air flotation column 31; specifically, the displacement movable device 33 is arranged on the inner wall of the air flotation column 31. The force sensor 32 is connected to the displacement movable device 33 as a movable component and can move up and down on the displacement movable device 33.

[0052] In order to reduce the test error and ensure the accuracy of the test results, preferably, two force sensors 32 that are bilaterally symmetrical and at the same level are set in the flotation column, and their average value is finally taken as the test result.

[0053] The two force sensors 32 are used to detect the dynamic changes of foam properties such as liquid content, gas content, and drainage rate in the foam during the foam growth and decay process. As a sensing device, it can convert the detected information into electrical signal output according to a certain rule.

[0054] It should be noted that this embodiment is intended to evaluate the performance of the foaming agent. During the foam growth and decay processes and in the gas holdup test, the foam growth rate and the amount of foam generated, the merger and collapse of bubbles, the amount of liquid discharged during the foam decay process, and the internal pressure of the foaming agent solution during the inflation process all change with time. The signal detected by the force sensor 32 records the above series of changes generated during the entire test process.

[0055] like Figure 3-Figure 4 As shown, in order to enable the two force sensors 32 to adapt to different test conditions and move up and down in the air flotation column 31, two movable displacement devices 33 are provided on the inner wall of the air flotation column 31. The movable displacement devices 33 include a sliding groove 331, a slider 332 and a displacement control bolt 333. Specifically, the sliding groove 331 is fixed to the inner wall of the air flotation column 31 by bolts and serves as a guide rail. The slider 332 is embedded in the sliding groove 331. The force sensor 32 is fixed to the slider 332. The displacement control bolt 333 is provided at the top of the sliding groove 331. The lower part of the displacement control bolt 333 is connected to the slider 332 to control the position height of the force sensor 32 fixed to the slider 332 in the air flotation column 31. Specifically, by turning the displacement control bolt 333, the slider 332 fixed to the force sensor 32 moves downward along the sliding groove 331 under the drive of the displacement control bolt 333, so that the force sensor 32 is placed at another height. It is understandable that reversely turning the displacement control bolt 333 can cause the slider 332 to move upward along the sliding slot 331 .

[0056] In order to facilitate the feeding of the test agent into the force sensor testing device 3, the testing system is also provided with a feeding device 1, which includes a foaming agent pre-dispersion device 11, a flow guide tube 12, a valve 13, a peristaltic pump 14 and a feed pipe 15; specifically, the pre-dispersion device 11, the flow guide tube 12, the valve 13, the peristaltic pump 14 and the feed pipe 15 are connected in sequence, and one end of the feed pipe 15 is connected to the feed port 311 on the wall of the aerated flotation column 31.

[0057] In this embodiment, the test system is equipped with an aeration device 2, which includes an air pump 21, a gas flowmeter 22, and an aeration tube 23. Specifically, the air pump 21 and the gas flowmeter 22 are connected by a conduit, and the air pump 21, the gas flowmeter 22, and the aeration tube 23 are connected in sequence. One end of the aeration tube 23 is connected to an air inlet 312 on the wall of the aeration flotation column 31. During the test, the air velocity can be freely adjusted according to different test conditions.

[0058] In order to convert the test changes detected by the force sensor 32 into the required data, the test system is also provided with a data acquisition device 4, including a wire, a signal amplifier 41, a data acquisition card 42 and a computer 43; specifically, the signal amplifier 41 is connected to the two force sensors 32 via a wire for amplifying the output signal, the data acquisition card 42 is connected to the signal amplifier 41 via a wire for collecting and storing data, and the computer 43 is connected to the data acquisition card 42 for recording and observing real-time changes in the output data.

[0059] In this embodiment, the feeding device 1 is connected to the feed port 311 on the force sensor testing device 3 through the feed pipe 15, the inflation device 2 is connected to the air inlet 312 on the force sensor testing device 3 through the inflation pipe 23, and the force sensor testing device 3 is connected to the signal amplifier 41 of the data acquisition device 4 through a wire.

[0060] Example 2

[0061] Another specific embodiment of the present invention discloses a test method for evaluating the performance of a foaming agent based on a force sensor, using the test system for evaluating the performance of a foaming agent based on a force sensor of Example 1, the steps comprising:

[0062] Step 1: Create a standard curve.

[0063] Place weights of different masses on the force sensor 32, record the changes in the voltage signal generated by the test, and determine the corresponding linear relationship between the measured voltage signal and the weight of the weight to create a corresponding standard curve;

[0064] Specifically, the force sensor 32 in this embodiment uses a bimorph as a cantilever beam to measure applied force. The bimorph is a piezoelectric device that exhibits a reversible piezoelectric effect. When a material deforms under an external force or an opposing external force, an internal charge is generated. When a force F is applied to the end of the bimorph cantilever beam, the lower surface experiences compressive strain, while the upper surface experiences expansion, and vice versa. The charge Q accumulated on the bimorph surface can be calculated using Equation (1):

[0065]

[0066] Where F is the applied force; device dimensions: L is the length, t is the thickness; d is the 31 - Charge constant of the piezoelectric material.

[0067] The force F at the end of the chip cantilever beam can be calculated by formula (2):

[0068]

[0069] Where E and I are the Young's modulus and moment of inertia of the cantilever beam, respectively.

[0070] The deformation y of the bimorph tip along the central axis is linearly related to the applied force, resulting in a proportional change in surface charge. Therefore, the output electrical signal is linearly related to the applied gravity, and the bimorph force can be described by Hooke's law (F = K·y).

[0071] Step 2: Inject the foaming agent solution.

[0072] Open valve 13, start the peristaltic pump 14, and inject the pre-mixed, homogeneous foaming agent solution into the air flotation column 31 through the feed pipe 15 and the feed port 311 on the side wall of the air flotation column 31. In this embodiment, typical non-ionic foaming agents such as sec-octanol, MIBC, and n-pentanol, as well as one of the cationic foaming agent DTAB and the anionic foaming agent SDS are used. The type and amount of foaming agent can be selected based on the experimental requirements and objectives.

[0073] Step 3: Inflate.

[0074] Turn on the air pump 21 and the gas flow meter 22. The gas is sucked into the air chamber 315 of the aerated flotation column 31 from the air inlet 312 through the inflation pipe 23, and passes through the porous sand core 314 to generate bubbles in the column of the aerated flotation column 31. Different gas speeds can be adjusted according to the test plan.

[0075] Step 4: Recording of force signals during foam growth.

[0076] During the bubble generation process, bubbles continuously converge toward the upper portion of the aerated flotation column 31, forming a foam layer. At this point, an upward force is applied to the force sensor 32 within the column. The signal response is displayed and recorded on the computer 43 via the signal amplifier 41 and data acquisition card 42. The corresponding force can be calculated based on the standard curve measured in step 1. Different foaming agents have varying bubble generation speeds and capacities, and thus exert varying forces on the force sensor. The test results can be used to analyze the foaming ability and water-carrying capacity of the foaming agent.

[0077] Step 5: Stop inflation.

[0078] When the height of the foam layer is stable, the air pump 21 and the gas flow meter 22 are turned off, the inflation is completed, the bubbles begin to merge and burst, the foam decay begins, and the height of the foam layer gradually decreases.

[0079] Step 6: Recording of force signals during the foam decay process.

[0080] During the decay of the foam layer, a downward force is applied to the force sensor 32 inside the column. This signal response is displayed and recorded on the computer 43 via the signal amplifier 41 and the data acquisition card 42. The corresponding force can be calculated based on the standard curve measured in step 1. Different foaming agents have different foaming abilities and bubble merger and collapse speeds, resulting in different forces acting on the force sensor 32. In the early stages of decay, the drainage of the foam layer is primarily by gravity. Due to the different liquid contents in the foam, a higher liquid content results in a higher drainage rate. The foaming agent's foam stabilization and drainage capabilities can be analyzed based on the test results.

[0081] Step 7: Change the force sensor position.

[0082] The position of the force sensor 32 is changed, and the displacement control bolt 333 is twisted to move the slider 332 fixing the force sensor 32 downward along the sliding groove 331 , so that the force sensor 32 is placed in the foaming agent solution to be tested.

[0083] Step 8: Create a standard curve.

[0084] Weights of varying masses were placed on a force sensor 32 placed in a foaming agent solution. The resulting voltage signal was recorded, and a linear relationship was established between the measured voltage signal and the applied weight, creating a corresponding standard curve. This confirmed a good linear relationship between the electrical signal and the applied weight.

[0085] Step 9: Inflate.

[0086] Turn on the air pump 21 and the gas flow meter 22, and fix the gas speed.

[0087] Step 10: Recording of force signal of gas holdup.

[0088] During the aeration process, bubbles form within the liquid, causing the internal pressure to change. This change causes force sensor 32 placed in the liquid to generate an electrical signal. This signal response is displayed and recorded on computer 43 via signal amplifier 41 and data acquisition card 42. The corresponding force can be calculated based on the standard curve measured in step 8. For a constant amount of aeration, the rising speed and size distribution of bubbles in the liquid phase determine the gas holdup in the solution. The gas holdup varies in different frother solutions.

[0089] It should be noted that when it is necessary to test the performance of other foaming agents, repeat steps 1 to 10.

[0090] Compared to traditional foaming agent performance evaluation methods, the present embodiment utilizes a force sensor to evaluate foaming agent performance. This testing system and method can significantly reduce the workload of test personnel and prevent minor differences occurring during the test from being lost. The data monitored and recorded by this method closely corresponds to the test process, enabling real-time and accurate recording of test data, facilitating subsequent analysis and qualitative evaluation of foaming agent performance. This present invention addresses the issues of inaccurate and time-consuming foam state evaluation by test personnel, thereby providing more accurate guidance for evaluating foaming agent performance.

[0091] Compared with traditional foam stability test devices and methods, the present invention can record experimental data through a force sensor and obtain a force curve through signal conversion processing. From the force curve, the changing trends of foam growth rate, growth capacity, water carrying capacity, decay capacity, drainage capacity and gas content can be qualitatively analyzed. That is, the idea of ​​micro-nano mechanics is used to realize the multifunctional and multi-indicator integration of foam evaluation indicators.

[0092] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A test method for evaluating the performance of a foaming agent based on a force sensor, characterized in that: A test system for evaluating the performance of a foaming agent using a force sensor includes the following steps: Step 1: Create a standard curve between the voltage signal of the force sensor in air and the weight of the weight; place weights of different masses on the force sensor, record the change in the voltage signal generated by the test, and determine the corresponding linear relationship based on the measured voltage signal and the weight of the weight to create a corresponding standard curve; Step 2: Inject the foaming agent solution; open the valve, start the pump head of the peristaltic pump, and inject the pre-stirred and uniform foaming agent solution into the column of the air flotation column through the feed port on the side wall of the air flotation column through the feed pipe; Step 3: Inflate; turn on the air pump and gas flowmeter, and gas is sucked into the air chamber of the air flotation column through the air inlet through the air filling pipe, and passes through the porous sand core to generate bubbles in the column of the air flotation column; Step 4: Record the force signal of the foam growth process; during the bubble generation process, the bubbles continuously converge to the upper part of the column of the air flotation column to form a foam layer. At this time, the force sensor inside the column is subjected to an upward force, and the signal response is amplified by the signal The device and data acquisition card display and record on the computer; Step 5: Stop inflation; When the foam layer height is stable, turn off the air pump and gas flow meter, inflation ends, bubbles begin to merge and burst, foam decay begins, and the foam layer height gradually decreases; Step 6: Record the force signal of the foam decay process; During the decay of the foam layer, a downward force is applied to the force sensor inside the column, and the signal response is displayed and recorded on the computer through the signal amplifier and data acquisition card; Step 7: Change the position of the force sensor; Twist the displacement control bolt to move the slider fixing the force sensor down along the sliding groove, and place the force sensor in the tested foaming agent solution; Step 8: Make a standard curve between the voltage signal of the force sensor in the foaming agent solution and the weight of the weight; Place weights of different masses on the force sensor placed in the foaming agent solution, record the voltage signal changes generated by the test, and determine the corresponding linear relationship between the measured voltage signal and the weight of the weight to make a corresponding standard curve; Step 9: Inflate; Step 10: Record the force signal of the gas content; During the inflation process, the force sensor in the liquid generates an electrical signal, and the signal response is displayed and recorded on the computer through the signal amplifier and data acquisition card; A test system for evaluating the performance of a foaming agent based on a force sensor includes a feeding device, an inflation device, a force sensor testing device, and a data acquisition device; the feeding device is used to deliver the test agent to the force sensor testing device, the inflation device is used to deliver gas to the force sensor testing device, and the data acquisition device is used to collect and record data generated by the force sensor testing device; The force sensor testing device includes an inflatable flotation column, a force sensor and a displacement movable device. The force sensor is located in the inflatable flotation column and can move up and down along the inner wall of the inflatable flotation column. The displacement movable device is arranged on the inner wall of the inflatable flotation column. The displacement movable device includes a sliding groove, a slider and a displacement control bolt. The sliding groove is fixed on the inner wall of the inflatable flotation column, the slider is embedded in the sliding groove, the force sensor is fixed on the slider, the displacement control bolt is arranged at the top of the sliding groove, and the lower part of the displacement control bolt is connected to the slider.

2. The test method for evaluating the performance of a foaming agent based on a force sensor according to claim 1, characterized in that: The porous sand core is arranged at the lower part of the aerated flotation column.

3. The test method for evaluating the performance of a foaming agent based on a force sensor according to claim 1, characterized in that: The feeding device includes a foaming agent pre-dispersing device and a peristaltic pump, and the foaming agent pre-dispersing device is communicated with the peristaltic pump.

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