Electrorheological valve, electrorheological valve array and touch pattern display device

Abstract

The invention relates to the technical field of electrorheological valves, and discloses an electrorheological valve, an electrorheological valve array and a touch pattern display device.The electrorheological valve comprises a plurality of electrode plates and at least one isolation plate, the electrode plates are arranged in parallel in a stacked mode, voltages with different polarities are applied to the adjacent electrode plates, and the isolation plate is arranged between the electrode plates; each isolation plate is fixedly arranged between two adjacent electrode plates; each electrode plate is of a porous structure, and the projection coincidence degree of holes of two adjacent electrode plates on a plane perpendicular to a porous axis is within a preset range; each isolation plate is provided with a through hole covering all the holes of the two adjacent electrode plates, the through hole of each isolation plate is filled with electrorheological fluid, and the through hole is used for forming an electrorheological fluid flow channel; when no external electric field exists, the electrorheological fluid is fluid and can flow through the flow channel. The electrorheological valve is high in rigidity, good in structural stability and low in machining cost.

Description

Technical Field

[0001] The present invention relates to the technical field of electrorheological valves, and particularly to an electrorheological valve, an electrorheological valve array, and a tactile graphic display device. Background Art

[0002] With the development of technology, visually impaired people also need to enjoy the achievements of information development in the Internet era. Receiving graphic information is an essential and indispensable part of reading. Therefore, reducing the cost of a dot matrix Braille display and commercializing the two-dimensional tactile graphic display technology for visually impaired people have important economic significance and significant social significance. This provides a new opportunity for the electrorheological technology based on the intelligent material electrorheological fluid to commercialize the two-dimensional tactile graphic display technology.

[0003] Electrorheological fluid has an electrorheological effect in which its own viscosity and yield stress can be modulated steplessly and reversibly under the action of the electric field strength provided by an applied electric field. The electrorheological valve is one of the main forms of its application.

[0004] A structure of an existing electrorheological valve is as Figure 1 shown. The electrodes are composed of metal meshes, and the metal meshes are stacked in a laminated manner with insulating gaskets; the electric field changes non-uniformly, and the electric field distribution is controlled by the thickness of the insulating gasket and the staggering and rotation angles between adjacent copper meshes. However, the wire diameter of the mesh electrodes of this structure is on the order of hundreds of micrometers, and the stiffness is insufficient. During the assembly process, the deformation and displacement of the metal wires are likely to occur, thereby affecting the actual electric field distribution of the valve, or even causing short circuits between the positive and negative electrodes and affecting the product yield. The stability of the electric field strength and electric field distribution is crucial for the pressure drop of the electrorheological valve, that is, the operating stability of the valve. These deficiencies are not conducive to the commercialization of the two-dimensional tactile graphic display device such as a Braille dot matrix display. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to solve the problems of low stiffness of the mesh electrode valve in the prior art and easy displacement and deformation during the assembly process, so as to provide an electrorheological valve, an electrorheological valve array, and a tactile graphic display device.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides an electrorheological valve, comprising: a plurality of electrode plates and at least one spacer plate, wherein each electrode plate is arranged in parallel and stacked, different polar voltages are applied to adjacent electrode plates, and each spacer plate is fixedly arranged between two adjacent electrode plates; each electrode plate is a porous structure, and the coincidence degree of the holes of two adjacent electrode plates in the projection on a plane perpendicular to the porous axis is within a preset range; each spacer plate is provided with a through hole covering all the holes of two adjacent electrode plates, and each through hole of the spacer plate is filled with an electrorheological fluid, and the through hole is used to form an electrorheological fluid flow channel; when there is no external electric field, the electrorheological fluid is a fluid and can flow through the flow channel.

[0008] For the electrorheological valve provided by the present invention, compared with the existing mesh electrode structure, the electrode plates with a porous structure are formed by one-time processing, are not easily bent and deformed, have stronger stiffness, and have regular shapes, which can make the processing technology stable, provide the consistency of the products processed by the production line, is conducive to reducing the cost of related application products, and expanding the application scenarios.

[0009] In an optional embodiment, the periphery of each through hole of the spacer plate is hermetically connected to the adjacent electrode plate.

[0010] In an optional embodiment, the electrode plate is formed by using a printed circuit board process.

[0011] For the electrorheological valve provided by the present invention, the porous electrode plates of the present invention can be processed by a mature printed circuit board industrial processing technology, and the processing technology is stable and has good consistency.

[0012] In an optional embodiment, by adjusting the hole patterns of two adjacent electrode plates and the coincidence angle of their projections on a plane perpendicular to the porous axis, the electric field distribution and intensity are adjusted, and further the yield stress of the electrorheological fluid in the non-uniform electric field coverage area is adjusted, so as to adjust the resistance of the flow channel.

[0013] For the electrorheological valve provided by the present invention, by adjusting the hole patterns of each electrode plate and the coincidence angle of their projections, the electric field intensity is flexibly adjusted, so as to realize the flexible adjustment of the resistance of the electrorheological fluid, make the sensitivity of the electrorheological valve adjustable, have high flexibility and a wide application range.

[0014] In a second aspect, the present invention provides an electrorheological valve array, comprising: a plurality of conductive plates, at least one insulating plate, and a plurality of identical electrorheological valves of the first aspect, wherein each conductive plate is arranged in parallel and stacked, different polarities of voltages are applied to adjacent conductive plates, and each insulating plate is fixedly arranged between two adjacent ones; after determining the positions of a plurality of electrode plates on any one conductive plate according to a preset quantity and a preset arrangement pattern and then punching a porous pattern of the electrode plates, punching a porous pattern of the electrode plates on other conductive plates according to the same electrode plate arrangement pattern, and then covering metal films on the upper and lower surfaces at the positions of the electrode plates in each conductive plate, thereby forming a plurality of electrode plates; according to the same electrode plate arrangement pattern, through holes covering all the hole patterns of adjacent two electrode plate units are formed on each insulating plate, and the number of through holes on each insulating plate is the same as the number of electrode plate units on each conductive plate.

[0015] The electrorheological valve array provided by the present invention can freely set the positions and quantities of the electrorheological valves according to the usage requirements, and simultaneously manufacture the porous patterns of the electrodes of the electrorheological valves when processing and printing the conductive plates, and form them in one processing, so that the electrorheological valve array has modularization, reduces the production difficulty and production cost, and centrally controls the forms of the electrorheological fluids in a plurality of electrorheological valves through the conductive plate device, and flexibly adjusts the flow rates of the electrorheological valves to meet various application requirements.

[0016] In an optional embodiment, metal films are covered on the pore walls of the through holes of each electrode plate.

[0017] In an optional embodiment, both the conductive plate and the insulating plate include: a plurality of assembly holes, wherein the assembly holes are used for fixedly connecting the conductive plate and the insulating plate.

[0018] In an optional embodiment, each insulating plate is hermetically connected to the adjacent conductive plate.

[0019] In a third aspect, the present invention provides a tactile graphics display device, comprising: a plurality of bumps, a power mechanism, and the electrorheological valve array of the second aspect, wherein each bump is respectively arranged on the top of an electrorheological valve; the power mechanism is communicated with each flow channel, and the power mechanism is used for conveying or extracting the electrorheological fluid to each flow channel; when there is no external electric field, the power mechanism drives the electrorheological fluid to flow in the flow channel, thereby pushing the bumps to move up and down.

[0020] The tactile graphic display device provided by the present invention is equipped with an electrorheological valve array composed of a plurality of electrorheological valves. By adjusting the resistance of the electrorheological fluid using an externally applied electric field, a power mechanism is used to drive the electrorheological fluid to push the bumps to move. The electrode plates of the electrorheological valves for bump display operate in a stationary state without relative movement, the power consumption of the entire device is low, and the electrorheological valve array is formed in one processing, with strong stiffness. When the user touches and presses the device, the electrode plates of the electrorheological valves are not easily deformed, improving the service life and user experience of the device.

[0021] In an alternative embodiment, when a certain externally applied electric field is applied, the yield strength of the electrorheological fluid in the electrorheological valve increases, and the resistance of the pressure drop of the electrorheological valve increases to be greater than the driving pressure of the power mechanism. After the pressure connection between the bump and the power mechanism is disconnected, the bump maintains a stationary state and stops moving. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 is a schematic structural diagram of a reticular electrorheological valve in the related art;

[0024] Figure 2 is a structural sectional view of an electrorheological valve according to an embodiment of the present invention;

[0025] Figure 3 is a structural top view of an electrorheological valve according to an embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of an electrorheological valve array according to an embodiment of the present invention;

[0027] Figure 5 is a structural sectional view of an electrorheological valve array according to an embodiment of the present invention;

[0028] Figure 6 is a schematic structural diagram of a tactile graphic display device according to an embodiment of the present invention;

[0029] Figure 7 is a trend diagram of the pressure drop of the electrorheological valve array varying with the externally applied voltage according to an embodiment of the present invention. Detailed Embodiments

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can also be the communication inside two components. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Under the action of the electric field strength provided by an external electric field, the viscosity and yield stress of an electrorheological fluid can be modulated steplessly and reversibly. As the electric field strength increases, it can change from a liquid state to a quasi-solid state, and the resistance gradually increases. The electrorheological valve is one of the main application forms. In related technologies, as Figure 1 shown, the electrorheological valve has a mesh electrode structure. The electrodes are composed of metal meshes, and the metal meshes are stacked in a laminated manner with insulating gaskets; the electrode gaps change non-uniformly and are controlled by the thickness of the insulating gaskets and the staggered and rotation angles between adjacent copper meshes. The flow cross-section of the valve is mainly controlled by the density of the metal grids, and the cross-section of the valve flow channel and the electrode gap are no longer the same parameter. Therefore, the performance control quantities of the valve are controlled separately, providing more means and a larger space for valve design.

[0035] However, the disadvantage of the mesh structure is that the wire diameter of the metal wire constituting the mesh electrode is relatively small, on the order of hundreds of micrometers, and its stiffness is insufficient. During the assembly process, it is easy to cause deformation and displacement of the metal wire, thereby affecting the actual electric field distribution of the valve, and even causing a short circuit between the positive and negative electrodes, affecting the yield of the product.

[0036] In order to improve the stiffness of the electrorheological valve, this embodiment provides an electrorheological valve 11. Figure 2 FIG. is a cross-sectional view of the electrorheological valve 11 in the vertical direction. The electrorheological valve 11 includes: a plurality of electrode plates 111 and at least one isolation plate 112.

[0037] Figure 2 Taking the electro-rheological valve 11 including three electrode plates 111 and two separator plates 112 as an example, each electrode plate 111 is arranged in parallel and laminated. Different polar voltages are applied to adjacent electrode plates 111. Each separator plate 112 is fixedly arranged between two adjacent electrode plates 111; each electrode plate 111 has a porous structure, and the coincidence degree of the projections of the holes 113 of two adjacent electrode plates 111 on a plane perpendicular to the porous axis is within a preset range. Each separator plate 112 is provided with a through hole 114 covering all the holes of two adjacent electrode plates 111. The through hole 114 of each separator plate 112 is filled with electro-rheological fluid, and the through hole is used to form an electro-rheological fluid flow channel; when there is no external electric field, the electro-rheological fluid is a fluid and can flow through the flow channel.

[0038] Specifically, Figure 2 In it, each electrode plate 111 is provided with a plurality of holes 113. The shape, aperture, quantity, and distribution position of the holes 113 on each electrode plate can be set as required. Each electrode plate 111 is formed by one-time processing, and the holes 113 are obtained by drilling holes in the electrode plate 111, which ensures the stiffness of the electrode plate 111 and avoids deformation. Each separator plate 112 is arranged between two adjacent electrode plates 111. Each separator plate 112 is respectively provided with a through hole 114, and the through hole 114 covers all the holes 113 on the adjacent electrode plates 111. The periphery of the through hole 114 of the separator plate 112 is hermetically connected to the adjacent electrode plates 111 to prevent the electro-rheological fluid in the through hole 114 from flowing into the inter-plate gap.

[0039] Figure 2 In it, by adjusting the coincidence angle of the projections of the holes 113 of two adjacent electrode plates 111 on a plane perpendicular to the porous axis, the electric field distribution and intensity are adjusted, and then the yield stress of the electro-rheological fluid in the non-uniform electric field coverage area is adjusted, so as to adjust the resistance of the flow channel.

[0040] Specifically, Figure 3 Taking two adjacent identical electrode plates 111 as an example, the solid line represents the holes 113 on the upper electrode plate 111, and the dotted line represents the holes 113 on the lower electrode plate 111. The intersection of the holes 113 on two adjacent electrode plates 111 forms a flow channel for the electro-rheological fluid to flow through. When an external electric field is applied to the electrode plate 111, an edge electric field will be formed between the holes 113 of the adjacent upper and lower electrode plates, and the intensity of the edge electric field determines the resistance of the electro-rheological fluid. If the holes 113 of all the electrode plates 111 completely coincide, it will cause the edge electric field intensity to be extremely small, and the electro-rheological fluid maintains a liquid flow state under the action of the edge electric field, and the resistance hardly changes, so that the pressure drop of the electro-rheological valve 11 is very small and the blocking ability is lost.

[0041] Therefore, Figure 3 in Figure 3 , the coincidence degree of the projections of the holes 113 on all the electrode plates 111 in the electrorheological valve 11 of this embodiment on a plane perpendicular to the porous axis should be greater than 0% and less than 100%. Technicians can adjust the strength of the edge electric field and the resistance of the electrorheological fluid by adjusting the coincidence degree, so as to adjust the pressure drop of the electrorheological valve 11.

[0042] The electrorheological valve provided in this embodiment, compared with the existing mesh electrode structure, the holes on the electrode plate with a porous structure are formed by punching in one process when manufacturing the electrode plate. The electrode plate is not easy to bend and deform, has stronger stiffness, and has a regular shape, which can make the processing technology stable, provide the consistency of the products processed by the production line, is beneficial to reducing the cost of related application products, the valve pressure drop is flexibly adjustable, and the application scenario is expanded.

[0043] In some optional implementation manners, Figure 2 in Figure 2 , the electrode plate 111 is formed by using a printed circuit board process.

[0044] Exemplarily, Figure 2 in Figure 2 , the porous electrode structure of the electrorheological valve 11 can use existing mature batch processing technologies, such as the printed circuit board process. The circuit board substrate is epoxy resin. The electrode pattern on the surface of the electrode plate 111 is left after etching the copper clad laminate. During the production process of the electrode plate 111, punching is directly performed according to the porous pattern, and it can be formed in one process, with high processing accuracy, high position repeat accuracy, and the advantages of modularization, which greatly reduces the processing cost and improves the stiffness.

[0045] This embodiment provides an electrorheological valve array 1, as Figure 4 shown, including: a plurality of conductive plates 12, at least one insulating plate 13, and a plurality of identical electrorheological valves 11 of the above embodiment and any of its optional implementation manners. Wherein, each of the conductive plates 12 is arranged in parallel and stacked, different polar voltages are applied to adjacent conductive plates 12, and each insulating plate 13 is fixedly arranged between two adjacent conductive plates 12; after determining the positions of a plurality of electrode plates on any one of the conductive plates 12 according to a preset quantity and a preset arrangement manner and then performing punching on the porous pattern of the electrode plates, and then performing punching on the porous pattern of the electrode plates on other conductive plates 12 according to the same electrode plate arrangement manner, metal films are covered on the upper and lower surfaces at the positions of the electrode plates 11 in each conductive plate, so as to form a plurality of electrode plates;

[0046] Specifically, Figure 4In the [description], the porous copper-clad sheets at the positions of the electrorheological valves 11 in each row of the electrorheological valve array 1 are electrically connected. First, on the substrate of a conductive plate 12, according to the number of required electrorheological valves 11, the positions and numbers of the corresponding electrode plates are determined, and the small holes are processed at one time at the places where holes need to be drilled, and then copper foil is coated. The copper-clad process is generally classified according to the copper-clad amount per unit area. The thickness of the copper foil corresponding to 1 ounce of copper-clad amount is about 35 microns. The copper-clad patterns on the upper surface and the lower surface of the conductive plate 12 (i.e., a porous electrode plate) are the same, and there is also copper cladding on the pore walls of the holes in each electrode plate. The thickness of the copper cladding with 1 ounce of copper-clad amount is about 18 microns, which is used to ensure that the copper-clad parts on the upper and lower surfaces of the electrode plate in the electrorheological valve 11 are electrically connected. When stacking multiple electrode plates to form the electrorheological valve 11 later, the effectiveness of the electrical connection of the electrorheological valve 11 is ensured.

[0047] Figure 4 In the [description], according to the same arrangement mode of the electrode plates, through holes covering all the holes of two adjacent electrode plates are formed on each insulating plate 13. The number of through holes on each insulating plate 13 is the same as the number of electrode plates on each conductive plate 12, that is, the same as the number of all the electrorheological valves 11 in the electrorheological valve array 1.

[0048] Specifically, Figure 4 In the [description], the insulating plate 13 is provided with through holes according to the positions of the electrode plates on the adjacent conductive plates 12. There is a through hole for filling the electrorheological fluid between every two adjacent upper and lower electrode plates, and the area of the through hole covers the porous electrode area on the electrode plate. When three conductive plates 12 and two insulating plates 13 are stacked, the upper conductive plate 12 and the lower conductive plate 12 are connected to the negative electrode, and the middle conductive plate 12 is connected to the positive electrode. Then, after stacking, a two-layer series-connected electrorheological valve array 1 composed of multiple electrorheological valves 11 with the same distributed electric field intensity can be obtained. By adjusting the magnitude of the applied electric field, the resistance of the electrorheological fluid in each electrorheological valve 11 can be adjusted, so as to adjust the overall pressure drop of the corresponding electrorheological valve 11 and the electrorheological valve array 1. It should be noted that the porous electrode structure electrorheological valve can provide a non-uniform control electric field, and at the same time has the characteristics of decoupling the zero-field flow channel resistance and the control parameters of the valve pressure drop under the applied electric field. The zero-field flow channel resistance of the electrorheological valve and its control parameters of the valve pressure drop are in a weakly coupled state.

[0049] The electrorheological valve array provided by this embodiment can freely set the positions and numbers of the electrorheological valves according to the usage requirements, combine multiple electrorheological valves into one body through a conductive plate device, and be formed at one time, so that the electrorheological valve array has modularization, reducing the production difficulty and production cost. The morphology of the electrorheological fluid in multiple electrorheological valves is centrally controlled through the conductive plate device, and the flow rate of the electrorheological valve is flexibly adjusted to meet various application requirements.

[0050] In some alternative embodiments, such as Figure 5 shown, the conductive plate 12 and the insulating plate 13 both include: a plurality of assembly holes 14, wherein the assembly holes 14 are used to fixedly connect the conductive plate 12 and the insulating plate 13. Each of the insulating plates 13 is hermetically connected to the adjacent conductive plate 12. The number of the assembly holes is determined according to the required sealing pressure and the display area. The larger the display area, the more assembly holes are required. Similarly, the greater the required sealing pressure, the more assembly holes are used and the closer the distribution of the assembly holes is.

[0051] Exemplarily, Figure 5 taking an example that each electrorheological valve 11 includes two electrode plates 111 and one separator plate 112, outside the electrorheological valve 11, the insulating plate 13 is hermetically connected to the adjacent conductive plate 12.

[0052] It should be noted that those skilled in the art can set the number and positions of the assembly holes 14 as needed to ensure that the electrorheological fluid in the electrorheological valve 11 can flow through the flow channels. Braille, also known as dot writing or raised writing, is a writing system designed for the blind and perceived by touch. Since the size of the Braille bumps is very small, it brings many technical limitations to the research and development of refreshable Braille displays. Currently, only single-line 40-cell Braille displays are on the market and they are expensive, making it difficult for ordinary visually impaired people to afford. Therefore, reducing the cost of the matrix Braille bump display and commercializing the two-dimensional tactile graphics display technology for the visually impaired population is of great significance. The electrorheological technology based on the intelligent material electrorheological fluid provides a new opportunity for the commercialization of the two-dimensional tactile graphics display technology.

[0053] This embodiment provides a tactile graphics display device, such as Figure 6 shown, including: a plurality of bumps 2, a power mechanism 3, and an electrorheological valve array 1 in the second aspect, wherein each bump 2 is respectively disposed on the top of an electrorheological valve 11; the power mechanism 3 is in communication with the flow channels of each electrorheological valve 11, and the power mechanism 3 is used to convey or extract electrorheological fluid to each flow channel.

[0054] Specifically, Figure 6In the embodiment, voltages of different polarities are applied to adjacent conductive plates 12, and each bump 2 is connected to the flow channel and electrorheological fluid cavity 4 in the electrorheological valve 11 below. When there is no external electric field, the electrorheological fluid in the electrorheological fluid cavity 4 can, under the hydraulic pressure of the power mechanism 3, drive the corresponding bump 2 to move up and down through the flow channel in each electrorheological valve 11. When a certain external electric field is applied, the electrorheological fluid in the electrorheological fluid cavity 4 and the flow channel of each electrorheological valve 11 transforms into a "quasi-solid state". When the resistance increases to a level greater than the driving pressure of the power mechanism 3, the electrorheological valve 11 has a certain valve pressure drop. The yield strength of the electrorheological fluid in the electrorheological valve 11 increases, and the pressure drop of the electrorheological valve 11 increases, so that after the pressure connection between the bump 2 and the power mechanism 3 is disconnected, the bump 2 remains stationary.

[0055] For example, refer to Figure 7 The zero-field flow resistance of the ER valve array is 16.7 kPa. As the applied voltage increases, the valve pressure drop across the ER valve array increases monotonically. When the applied voltage is 420 V, the valve pressure drop reaches 80.5 kPa. The ER window is greater than 50 kPa, providing sufficient margin for "on" and "off" control. Therefore, by applying an external electric field, adjusting the magnitude of the applied electric field, or adjusting the flow channel area of each ER valve 11, valve performance can be modified, the refresh rate of the bump 2 can be improved, and the electronic control cost can be improved, achieving independent control of the motion state of the bump 2.

[0056] The tactile graphic display device provided in this embodiment is equipped with an electrorheological valve array consisting of multiple electrorheological valves. An external electric field is used to adjust the resistance of the electrorheological fluid, thereby enabling a power mechanism to drive the electrorheological fluid to move the raised dots. The electrode plates of the electrorheological valves used for the raised dot display operate in a static state without relative motion, resulting in low power consumption for the entire device. Furthermore, the electrorheological valve array is manufactured in a single process, providing high rigidity. This prevents deformation when the user touches and presses the device, improving its lifespan and user experience.

[0057] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An electrorheological valve, characterized in that, Comprising: Multiple electrode plates and at least one separator plate, wherein, Each of the electrode plates is arranged in parallel and stacked, different polar voltages are applied to adjacent electrode plates, and each separator plate is fixedly arranged between two adjacent electrode plates; Each of the electrode plates has a porous structure, and the coincidence degree of the projections of the holes of two adjacent electrode plates on a plane perpendicular to the porous axis is within a preset range; each separator plate is provided with through holes covering all the holes on two adjacent electrode plates, and each through hole of each separator plate is filled with an electrorheological fluid, and the through holes are used to form electrorheological fluid flow channels; When there is no external electric field, the electrorheological fluid is a fluid and can flow through the flow channels.

2. The electrorheological valve according to claim 1, wherein The periphery of the through hole of each separator plate is hermetically connected to the adjacent electrode plate.

3. The electrorheological valve according to claim 1, wherein The electrode plate is manufactured and formed by using a printed circuit board process.

4. The electrorheological valve according to any one of claims 1 to 3, wherein By adjusting the coincidence angle of the projections of the holes of two adjacent electrode plates on a plane perpendicular to the porous axis, the electric field distribution and intensity are adjusted, and further the yield stress of the electrorheological fluid in the non-uniform electric field coverage area is adjusted, thereby adjusting the resistance of the flow channel.

5. An electrorheological valve array, characterized in that Comprising: Multiple conductive plates, at least one insulating plate and multiple electrorheological valves according to any one of claims 1 to 4, wherein, Each of the conductive plates is arranged in parallel and stacked, different polar voltages are applied to adjacent conductive plates, and each insulating plate is fixedly arranged between two adjacent conductive plates; After determining the positions of multiple electrode plates on any one of the conductive plates according to a preset quantity and a preset arrangement mode and then punching the porous patterns of the electrode plates, and then punching the porous patterns of the electrode plates on other conductive plates according to the same electrode plate arrangement mode, metal films are covered on the upper and lower surfaces of the electrode plate positions in each conductive plate, thereby forming multiple electrode plates; According to the same electrode plate arrangement mode, through holes covering all the holes on two adjacent electrode plates are opened on each insulating plate, and the number of through holes on each insulating plate is the same as the number of electrode plates on each conductive plate.

6. The electrorheological valve array according to claim 5, wherein The inner wall of the through hole of each electrode plate is covered with a metal film.

7. The electrorheological valve array according to claim 5 or 6, characterized in that, The conductive plate and the insulating plate each include: multiple assembly holes, wherein, The assembly holes are used for fixedly connecting the conductive plate and the insulating plate.

8. The electrorheological valve array according to claim 7, wherein Each insulating plate is hermetically connected to the adjacent conductive plate.

9. A tactile graphic display device, characterized in that, Comprising: Multiple bumps, a power mechanism and an electrorheological valve array according to any one of claims 5 to 8, wherein, Each of the bumps is respectively arranged on the top of an electrorheological valve; The power mechanism is communicated with each flow channel, and the power mechanism is used for conveying or pumping the electrorheological fluid to each flow channel; When there is no externally applied electric field, the driving mechanism drives the electrorheological fluid to flow in the flow channel, thereby driving the up and down movement of the bump.

10. The tactile graphic display device according to claim 9, characterized in that When a certain externally applied electric field is applied, the yield strength of the electrorheological fluid in the electrorheological valve increases, and the pressure drop of the electrorheological valve increases to be greater than the driving pressure of the driving mechanism, so that after the pressure connection between the bump and the driving mechanism is disconnected, the bump maintains a static state.

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