Physical pressure experiment demonstration device with pressure tactile feedback

Abstract

The invention relates to the technical field of demonstration appliances, in particular to a physical pressure experiment demonstration device with pressure tactile feedback, which comprises a pressure test component, a pressure feedback glove and a gesture recognition component. Pressure tactile feedback is introduced into physical experiment teaching, and the experience of students is effectively improved through cooperation of tactile sense and visual sense. When the lifting assembly drives the pressure intensity sensing assembly to move in liquid, the water pressure sensor collects depth pressure intensity data in real time, the depth pressure intensity data is converted into quantifiable tactile stimulation through the signal processing unit, and students can directly sense the physical law that pressure intensity increases along with depth through palms. Compared with a traditional mode of simply observing the height of the liquid column, the somatosensory feedback generated by the method provided by the invention concrete an abstract concept, realizes multi-sensory collaborative cognition, and remarkably reduces the understanding threshold. Meanwhile, the experiment device is controlled in a gesture recognition mode, and operation convenience and interestingness are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of demonstration tools, in particular to a physical pressure experiment demonstration device with pressure tactile feedback. Background Art

[0002] Pressure is fundamental, pivotal, and practically important in physics teaching. It is a key concept connecting mechanics, thermodynamics, fluid dynamics, and even engineering applications. Traditional pressure demonstration devices are often based on mechanical structural designs. For example, they use the height difference of the liquid level in a U-shaped tube to show the change of liquid pressure with depth, or use replaceable components of weights and pressure areas to verify the relationship between pressure and pressure. With the development of sensing technology, some experimental devices have begun to introduce digital sensors (such as pressure sensors and displacement sensors) to achieve real-time data collection and analysis, improving measurement accuracy.

[0003] CN201720111667.8 and CN201520070333.1 respectively disclose two liquid pressure demonstration experimental devices that can demonstrate pressure conditions at different water depths by adjusting the liquid level. However, these devices suffer from the following issues: 1. Lack of interactivity and user experience. Traditional devices rely on visual observation (such as liquid column height and scale markings) and lack multi-sensory collaborative feedback. Students cannot intuitively perceive pressure changes through touch, especially the dynamic changes in internal liquid pressure, making it difficult to understand abstract concepts. 2. Lack of operational flexibility. Existing devices (such as CN201720111667.8) require manual adjustment of the lifting mechanism, resulting in slow lifting speed and low change efficiency, making them difficult to adapt to classroom demonstration needs. Summary of the Invention

[0004] Existing physical pressure experiment devices have significant deficiencies in real-time tactile feedback and human-computer interaction, which limits teaching effectiveness. This invention provides a physical pressure experiment demonstration device with pressure tactile feedback. By integrating dynamic pressure sensing, gesture-driven lifting and lowering control, and a closed-loop tactile feedback loop, it achieves an integrated "operation-perception-feedback" experimental process, addressing the core issues of weak interactivity, low security, and insufficient cognitive efficiency in traditional experiments.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A physical pressure experiment demonstration device with pressure tactile feedback, comprising a pressure test component, a pressure feedback glove, and a gesture recognition component; The pressure testing assembly includes a container, a receiving cavity for holding liquid is provided in the container, a pressure sensing assembly and a lifting assembly are provided in the receiving cavity, and a liquid inlet is provided at the top of the container; The pressure feedback glove comprises a glove body, on which are provided a plurality of air bags and an inflation assembly for inflating the air bags; The gesture recognition component includes a reflective ball, a camera component and a signal processing unit. The reflective ball is arranged on the glove body. The camera component is used to capture the gesture image of the operator after wearing the pressure feedback glove and transmit it to the signal processing unit. The signal processing unit recognizes the arrangement of the reflective balls in the gesture image and generates instructions. The lifting component drives the pressure sensing component to move up and down based on the instructions.

[0006] As an improvement, the number of the reflective balls is four, which are respectively arranged on both sides of the glove body corresponding to the wrist, and on the front and back sides of the index finger.

[0007] As an improvement, the signal processing unit performs data processing as follows: Step 1: Collect gesture images and remove noise through Gaussian filtering; Step 2: Extract the HSV color gamut features of the reflective ball and segment the foreground and background; Step 3: Compress the gesture feature vector based on PCA dimensionality reduction method; Step 4: Use the SVM classifier to match the preset gesture command library and generate commands.

[0008] As an improvement, a reflective ball seat is provided on the glove body, and the reflective ball seat and the reflective ball are provided with mutually cooperating magnetic suction parts, and the surface of the reflective ball is coated with reflective material.

[0009] As an improvement, the lifting assembly includes a motor and a secondary screw telescopic structure; the motor is arranged at the top of the container, and the secondary screw telescopic structure is arranged in the accommodating cavity; The two-stage screw telescopic structure includes an outer sleeve, a first screw, a second screw, a first sleeve, and a second sleeve; the outer sleeve is fixedly connected to the top of the accommodating chamber, the first screw is passed through the outer sleeve and is rotatably connected to the outer sleeve; the first sleeve is provided with a threaded hole and is threadedly connected to the first screw, the inner wall of the outer sleeve is provided with a first groove, and the outer side of the first sleeve is provided with a first protrusion that cooperates with the first groove; The second screw is disposed in the first sleeve. The second screw is hollow and sleeved on the outside of the first screw. The second screw is rotatably connected to the first sleeve. The first screw is provided with a second groove. The inner wall of the second screw is provided with a second protrusion that cooperates with the second groove, so that the second screw rotates synchronously with the first screw. The second sleeve is sleeved on the outside of the second screw rod. The second sleeve is provided with a second threaded hole and is threadedly connected to the second screw rod.

[0010] As an improvement, the pressure detection assembly includes a balloon and a water pressure sensor. A balloon mounting seat is provided at the end of the second sleeve. The water pressure sensor is adhered to the surface of the balloon and is electrically connected to the signal processing unit via a wire.

[0011] As an improvement, the glove body is provided with a plurality of reinforcement parts made of rubber, which cover the wrist and the back of the hand and extend to the base of the fingers.

[0012] As an improvement, the airbag includes a back-of-hand airbag and a palm airbag. The number of the palm airbag is one corresponding to the palm position, and the number of the back-of-hand airbag is multiple, which are respectively arranged under the reinforcement part.

[0013] As an improvement, the inflation assembly includes an air pump and a solenoid valve array. The air pump is located on one side of the glove body and is used to inflate the palm airbag and the back airbag. The solenoid valve array is connected to each airbag respectively. The glove body is provided with a power supply assembly and a communication assembly. The communication assembly is wirelessly connected to a signal processing unit via Bluetooth. The signal processing unit generates a pressure control instruction based on the data of the pressure sensing assembly and controls the inflation intensity of the airbag by adjusting the opening and closing time of the solenoid valve. The power supply component is used to supply power to the communication component and the air pump.

[0014] As an improvement, the container is made of a transparent acrylic material and is provided with scale markings.

[0015] The advantages of the present invention are: 1. This invention introduces pressure tactile feedback into physics experiment teaching, effectively improving students' experience by combining touch with vision. When the lifting component drives the pressure sensing component to move in the liquid, the water pressure sensor collects depth pressure data in real time, which is converted into quantifiable tactile stimulation by the signal processing unit, allowing students to directly perceive the physical law of "pressure increasing with depth" through their palms. Compared with the traditional method of simply observing the height of the liquid column, the somatosensory feedback generated by this invention concretizes abstract concepts, and uses multi-sensory collaborative cognition to significantly lower the threshold for understanding.

[0016] 2. This invention uses gesture recognition to control the experimental device, significantly increasing the fun of operation. Furthermore, compared to traditional experimental methods that require manual adjustment after approaching the experimental device, this invention allows for remote control via gestures, making operation much simpler. This invention also utilizes a two-stage screw lift structure, significantly improving lift stability and stroke, and increasing the pressure range. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0018] Figure 2 This is a structural diagram of the pressure testing component in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0019] Figure 3 This is a diagram of the internal structure of the pressure test assembly in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0020] Figure 4 This is a structural diagram of the secondary screw telescopic structure in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0021] Figure 5 This is an exploded view of the secondary screw telescopic structure in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0022] Figure 6 This is a structural diagram of the first screw in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0023] Figure 7 This is a structural diagram of the first sleeve in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0024] Figure 8 This is a schematic diagram of the outer sleeve and the first sleeve in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0025] Figure 9 This is a structural diagram of the bottom of the second screw in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0026] Figure 10 This is a structural diagram of the top of the first screw in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0027] Figure 11 This is a structural diagram of the second sleeve in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0028] Figure 12 This is a structural diagram of a pressure feedback glove in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0029] Figure 13 This is a structural diagram of the inner side of a pressure feedback glove in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0030] Figure 14 This is a structural diagram of the interior of a pressure feedback glove in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0031] Figure 15This is a structural diagram of the air blowing component in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0032] Figure 16 This is a structural diagram of the reflective ball seat in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0033] Figure 17 This is a flow chart of data processing performed by a signal processing unit in a physical pressure experiment demonstration device with pressure tactile feedback in Example 1.

[0034] Indicated in the figure: 1. Pressure test assembly; 11. Container; 12. Receiving chamber; 13. Liquid inlet; 14. Flip cover; 2. Pressure feedback glove; 21. Glove body; 22. Airbag; 221. Back airbag; 222. Palm airbag; 23. Inflating assembly; 231. Air pump; 232. Solenoid valve array; 24. Reinforcement; 25. Air pressure sensor; 26. Power supply assembly; 27. Reflective ball seat; 3. Gesture recognition assembly; 31. Reflective ball; 32. Camera assembly; 4. Pressure sensing assembly; 41. Balloon; 42. Water pressure sensor; 5. Lifting assembly Component; 51, motor; 52, secondary screw telescopic structure; 521, outer sleeve; 5211, first groove; 522, first screw; 5221, annular groove; 5222, keyway; 5223, second groove; 523, second screw; 5231, annular protrusion; 5232, second protrusion; 524, first sleeve; 5241, threaded hole; 5242, first protrusion; 5243, third groove; 525, second sleeve; 5251, second threaded hole; 5252, third protrusion; 5253, balloon mounting seat. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] Example 1 This embodiment is a physical pressure experiment demonstration device with pressure tactile feedback, such as Figure 1 As shown, it includes a pressure testing component 1, a pressure feedback glove 2, and a gesture recognition component 3. The gesture recognition component 3 includes a reflective ball 31, a camera component 32, and a signal processing unit.

[0037] like Figure 2As shown, the pressure test assembly 1 includes a container 11, which has a chamber 12 for holding liquid. The chamber 12 contains a pressure sensing assembly 4 and a lifting assembly 5. The top of the container 11 is provided with a liquid inlet 13, which is covered with a flip cover 14. The container 11 is made of transparent acrylic material to facilitate experimental observation. The surface of the container 11 can also be provided with a scale indicating the water depth.

[0038] like Figure 3 As shown, the lifting assembly 5 includes a motor 51 and a two-stage screw telescopic structure 52 ; the motor 51 is arranged on the top of the container 11 , and the two-stage screw telescopic structure 52 is arranged in the accommodating cavity 11 .

[0039] like Figure 4 and Figure 5 As shown, the secondary screw telescopic structure 52 includes an outer sleeve 521, a first screw 522, a second screw 523, a first sleeve 524 and a second sleeve 525. The outer sleeve 521 is fixedly connected to the top of the accommodating chamber 11, and the first screw 522 is passed through the outer sleeve 521 and is rotatably connected to the outer sleeve 521. Figure 6 As shown, the first screw rod 522 is provided with an annular groove 5221 and is rotatably connected to the outer sleeve 521 through the annular groove 5221. The tail end of the first screw rod 522 is provided with a keyway 5222 and is connected to the output shaft of the motor 51 through the keyway 5222.

[0040] like Figure 7 and Figure 8 As shown, the first sleeve 524 is provided with a threaded hole 5241, which is threadedly connected to the first screw 522. The inner wall of the outer sleeve 521 is provided with a first groove 5211, and the outer side of the first sleeve 524 is provided with a first protrusion 5242 that cooperates with the first groove 5211. Because the first screw 522 is threadedly connected to the first sleeve 524, when the motor 51 drives the first screw 522 to rotate, the first screw 522 pushes the first sleeve 524 to slide along the first groove 5211, forming a first-stage telescopic structure.

[0041] like Figure 9 and Figure 10 As shown, the second screw 523 is disposed within the first sleeve 524. The second screw 523 is hollow and sleeved on the outside of the first screw 522. An annular protrusion 5231 is provided at the bottom of the second screw 523, and an annular groove corresponding to the annular protrusion is provided within the first sleeve 524, allowing the second screw 523 to be rotatably connected to the first sleeve 524. A second groove 5223 is provided on the first screw 522, and a second protrusion 5232 is provided on the inner wall of the second screw 523 to cooperate with the second groove 5223, allowing the second screw 523 to rotate synchronously with the first screw 522. When the first screw 522 pushes the first sleeve 523 to slide, the second screw 523 can translate synchronously with the first sleeve 524 and can also rotate synchronously with the first screw 522.

[0042] like Figure 8 and Figure 11 As shown, the second sleeve 525 is disposed outside the second screw 523 and within the first sleeve 524. The second sleeve 525 is provided with a second threaded hole 5251, which is threadedly engaged with the second screw 523. A third groove 5243 is provided on the inner wall of the first sleeve 524, and a third protrusion 5252 is provided on the second sleeve 525 that engages with the third groove 5243. When the second screw 523 rotates, it pushes the second sleeve 525 to slide along the third groove 5243, forming a second-stage telescopic structure.

[0043] like Figure 3 and Figure 11 As shown, the pressure detection component 4 includes a balloon 41 and a water pressure sensor 42. A balloon mounting seat 5253 is provided at the end 525 of the second sleeve. The water pressure sensor 42 is attached to the surface of the balloon 41 and is electrically connected to the signal processing unit through a wire. When in use, the balloon 41 can be filled with a certain amount of gas and then tied to the balloon mounting seat 5253. After the balloon 41 is filled with gas, it has a certain pressure inside. When the balloon 41 follows the lifting component 5 to sink into different water depths, the volume of the balloon 41 can change according to the external water pressure, thereby improving the observation effect. The water pressure sensor 42 can feed back the water pressure information to the signal processing unit to facilitate subsequent instructions. The water pressure sensor 42 and the connection between it and the wire are waterproofed to avoid damage caused by water ingress.

[0044] like Figure 12 、 Figure 13 and Figure 14 As shown, the pressure feedback glove 2 includes a glove body 21 , on which a plurality of air bags 22 and an inflation assembly 23 for inflating the air bags 22 are provided.

[0045] The glove body 21 is equipped with several rubber reinforcements 24, which cover the wrist and back of the hand and extend to the base of the fingers. The airbags 22 include a back airbag 221 and a palm airbag 222. There is one palm airbag 222 per palm position, while there are multiple back airbags 221, each located below the reinforcements 24. The reinforcements 24 provide a certain degree of support. When inflated, the airbags 22 exert greater pressure on the hand.

[0046] like Figure 15 As shown, the inflation assembly 23 includes an air pump 231 and a solenoid valve array 232. The air pump 231 is located on one side of the glove body 21 and is used to inflate the palm airbags 222 and the back of the hand airbags 221. The solenoid valve array 232 is connected to each airbag 22. An air pressure sensor 25 is located within the palm airbag 222.

[0047] The glove body 21 is equipped with a power supply assembly 26 and a communication assembly. The communication assembly is wirelessly connected to the signal processing unit via Bluetooth. The signal processing unit generates pressure control instructions based on data from the pressure sensing assembly 4. The signal processing unit controls the inflation intensity of the airbag 22 by adjusting the opening and closing time of the solenoid valve array 232. The air pressure sensor 25 provides feedback on the air pressure within the palm airbag 222.

[0048] The power supply component 26 is used to supply power to the communication component, the air pressure sensor 25 and the air pump 231 .

[0049] like Figure 1 、 Figure 12 and Figure 13 As shown, the gesture recognition component 3 includes reflective balls 31, a camera component 32, and a signal processing unit. The reflective balls are attached to the glove body. The camera component captures the gesture image of the operator wearing the pressure feedback glove and transmits it to the signal processing unit. The signal processing unit identifies the arrangement of the reflective balls in the gesture image and generates a command. The lifting component drives the pressure sensing component up and down based on the command.

[0050] There are four reflective balls 31, which are respectively arranged on both sides of the glove body 21 corresponding to the wrist, and the front and back sides of the index finger. Figure 16 As shown, a reflective ball seat 27 is provided on the glove body 21 , and the reflective ball seat 27 and the reflective ball 31 are provided with mutually cooperating magnetic attraction parts, and the surface of the reflective ball is coated with reflective material.

[0051] like Figure 17 As shown, the process of data processing performed by the signal processing unit is as follows: Step 1: Collect gesture images and remove noise through Gaussian filtering.

[0052] The camera assembly 32 captures 640×480 RGB frames at 120 fps and then convolves the entire image with a 3×3 Gaussian kernel (σ≈1.0). This Gaussian filter effectively removes noise from the image, leaving the reflective ball's edges clean and its position stable. This reduces the error in subsequent coordinate capture to sub-pixel levels, preventing unsteady movement caused by hand tremors.

[0053] Step 2: Extract the HSV color gamut features of the reflective ball and segment the foreground and background.

[0054] Convert the RGB frame to HSV space; set a threshold mask: H∈[0,10]∪[160,180] (red reflective film), S>120, V>80; perform morphological closing on the mask (3×3 kernel) to fill holes; extract the largest connected domain and calculate its centroid (x,y) and area A. Ensure stable operation within a dynamic lighting range of 200–2000 lx, without the need for additional light sources or exposure adjustment, to meet the complex lighting conditions of classrooms.

[0055] Step 3: Compress the gesture feature vector based on PCA dimensionality reduction method.

[0056] Since only one of the reflective balls on the front and back of the index finger can appear in the image, we obtain 8-dimensional features (3 x and 3 y) for the three reflective balls in a frame of image. We take the most recent 20 frames to form a 20×8 matrix, center the matrix, and calculate the covariance to retain the 2-3 principal components with the largest eigenvalues, reducing the 8-dimensional feature set to 2 dimensions.

[0057] Step 4: Use the SVM classifier to match the preset gesture command library and generate commands.

[0058] Load the offline trained RBF-SVM model and feed the PCA feature vector into the SVM. Use a one-to-many strategy to distinguish four types of gestures: {raise, drop, stop, reset}. If the confidence level is > 0.85, output the corresponding command; otherwise, discard it.

[0059] When using this solution, a certain amount of liquid, such as water or saline, is first injected into the container 11. Then, the glove 2 undergoes initialization, including automatically emptying all airbags 22 and returning the air pressure sensor 25 to zero; raising the lifting assembly 5 to its highest position; and turning on the camera assembly 32.

[0060] The operator puts on the pressure feedback glove 2, ensuring that the two reflective balls 31 on the wrist are aligned with the camera assembly 32, and at least one reflective ball on the index finger is aligned with the camera assembly 32. Then the following gesture mapping instructions are used to operate the device.

[0061] Table 1 Gesture command mapping As the pressure detection assembly 4 sinks, the pressure sensed by the water pressure sensor 42 gradually increases. Based on the operating status of the control air inflation assembly 23 detected by the water pressure sensor 42, the signal processing unit feeds the liquid pressure back to the pressure feedback glove 2, thereby enhancing the operator's realistic experience. Furthermore, the signal processing unit can control the pressure amplification factor. Due to the low density of water, the pressure change caused by the height difference is small and not noticeable to the operator. Therefore, the operator's pressure feedback experience can be enhanced by setting the amplification factor.

[0062] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A physical pressure experiment demonstration device with pressure tactile feedback, characterized in that: Including pressure testing components, pressure feedback gloves and gesture recognition components; The pressure testing assembly includes a container, a receiving cavity for holding liquid is provided in the container, a pressure sensing assembly and a lifting assembly are provided in the receiving cavity, and a liquid inlet is provided at the top of the container; The pressure feedback glove comprises a glove body, on which are provided a plurality of air bags and an inflation assembly for inflating the air bags; The gesture recognition component includes a reflective ball, a camera component and a signal processing unit. The reflective ball is arranged on the glove body. The camera component is used to capture the gesture image of the operator after wearing the pressure feedback glove and transmit it to the signal processing unit. The signal processing unit recognizes the arrangement of the reflective balls in the gesture image and generates instructions. The lifting component drives the pressure sensing component to move up and down based on the instructions.

2. A physical pressure experiment demonstration device with pressure tactile feedback according to claim 1, characterized in that: There are four reflective balls, which are respectively arranged on both sides of the glove body corresponding to the wrist, and on the front and back sides of the index finger.

3. The physical pressure experiment demonstration device with pressure tactile feedback according to claim 2, characterized in that: The process of data processing performed by the signal processing unit is as follows: Step 1: Collect gesture images and remove noise through Gaussian filtering; Step 2: Extract the HSV color gamut features of the reflective ball and segment the foreground and background; Step 3: Compress the gesture feature vector based on PCA dimensionality reduction method; Step 4: Use the SVM classifier to match the preset gesture command library and generate commands.

4. The physical pressure experiment demonstration device with pressure tactile feedback according to claim 2, characterized in that: A reflective ball seat is provided on the glove body. Mutually cooperating magnetic suction parts are provided in the reflective ball seat and the reflective ball. The surface of the reflective ball is coated with reflective material.

5. The physical pressure experiment demonstration device with pressure tactile feedback according to claim 1, characterized in that: The lifting assembly includes a motor and a secondary screw telescopic structure; the motor is arranged at the top of the container, and the secondary screw telescopic structure is arranged in the accommodating cavity; The two-stage screw telescopic structure includes an outer sleeve, a first screw, a second screw, a first sleeve, and a second sleeve; the outer sleeve is fixedly connected to the top of the accommodating chamber, the first screw is passed through the outer sleeve and is rotatably connected to the outer sleeve; the first sleeve is provided with a threaded hole and is threadedly connected to the first screw, the inner wall of the outer sleeve is provided with a first groove, and the outer side of the first sleeve is provided with a first protrusion that cooperates with the first groove; The second screw is disposed in the first sleeve. The second screw is hollow and sleeved on the outside of the first screw. The second screw is rotatably connected to the first sleeve. The first screw is provided with a second groove. The inner wall of the second screw is provided with a second protrusion that cooperates with the second groove, so that the second screw rotates synchronously with the first screw. The second sleeve is sleeved on the outside of the second screw rod. The second sleeve is provided with a second threaded hole and is threadedly connected to the second screw rod.

6. The physical pressure experiment demonstration device with pressure tactile feedback according to claim 5, characterized in that: The pressure detection component includes a balloon and a water pressure sensor. A balloon mounting seat is provided at the end of the second sleeve. The water pressure sensor is adhered to the surface of the balloon and is electrically connected to the signal processing unit through a wire.

7. The physical pressure experiment demonstration device with pressure tactile feedback according to claim 1, characterized in that: The glove body is provided with a plurality of reinforcement parts made of rubber, which cover the wrist and the back of the hand and extend to the base of the fingers.

8. The physical pressure experiment demonstration device with pressure tactile feedback according to claim 7, characterized in that: The airbag includes a back of hand airbag and a palm airbag. The number of the palm airbag corresponds to one palm position. The number of the back of hand airbag is multiple and each of them is arranged below the reinforcement part.

9. The physical pressure experiment demonstration device with pressure tactile feedback according to claim 7, characterized in that: The inflation assembly includes an air pump and a solenoid valve array. The air pump is located on one side of the glove body and is used to inflate the palm airbag and the back airbag. The solenoid valve array is connected to each airbag respectively. The glove body is provided with a power supply assembly and a communication assembly. The communication assembly is wirelessly connected to a signal processing unit via Bluetooth. The signal processing unit generates a pressure control instruction based on the data of the pressure sensing assembly and controls the inflation intensity of the airbag by adjusting the opening and closing time of the solenoid valve. The power supply component is used to supply power to the communication component and the air pump.

10. The physical pressure experiment demonstration device with pressure tactile feedback according to claim 1, characterized in that: The container is made of a transparent acrylic material and is provided with scale markings.

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