A gesture recognition device and method based on pressure sensing

Abstract

The application discloses a gesture recognition device and method based on pressure sensing, and relates to the technical field of gesture recognition. The device comprises a mounting block, a deformation frame arranged on the mounting block, a touch block arranged on the deformation frame and forming a deformation area with the deformation frame, a circuit board arranged at the bottom of the deformation frame, and a sensor arranged on the circuit board and electrically connected with the circuit board. The sensor can sense the deformation amount of the deformation frame. The four gestures of left sliding, right sliding, light touch and pressing can be recognized by using a single sensor, so that the production process is simplified and the equipment cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of gesture recognition technology, specifically to a gesture recognition device and method based on pressure sensing. Background Technology

[0002] Currently, most similar devices on the market use solutions such as dual pressure sensors, capacitive sensing, and pressure-sensitive ink, which have drawbacks such as complex structural design, complex manufacturing process, small sensing range, and high cost.

[0003] Gesture recognition technology is a way to input commands by sensing the user's hand movements. Existing solutions often use dual pressure sensors, capacitive sensing, pressure-sensitive ink, and other similar methods.

[0004] However, processes such as pressure-sensitive ink printing and capacitor layer etching require extremely high environmental cleanliness and multiple photolithography and curing steps. Dual pressure sensors, on the other hand, require high-precision alignment and assembly to achieve pressure distribution detection, leading to increased equipment thickness and reduced reliability. The aforementioned solutions involve complex structural designs and manufacturing processes, resulting in high costs. Summary of the Invention

[0005] The purpose of this invention is to provide a pressure-sensing gesture recognition device and method that can recognize four gestures—left swipe, right swipe, light touch, and press—using a single sensor, simplifying the production process and reducing equipment costs.

[0006] The above-mentioned optimized structure of the present invention is achieved through the following technical solution: a pressure-sensing gesture recognition device, including a mounting block; A deformable frame is disposed on the mounting block; A touch block, wherein the touch block is disposed on the deformable frame and forms a deformable area with the deformable frame; A circuit board, wherein the circuit board is disposed at the bottom of the deformable frame; A sensor is mounted on and electrically connected to the circuit board, and the sensor can sense the deformation of the deformable frame.

[0007] In some embodiments, the mounting block includes a sealing plate disposed on one side of the deformable frame; Two mounting posts are symmetrically arranged on the sealing plate, and the deformation frame is provided between the two mounting posts.

[0008] In some embodiments, the deformable frame includes two connecting plates, which are symmetrically arranged on both sides of the bottom of the touch block; A base plate, wherein the base plate is arranged parallel to the two base plates; Two inclined plates are respectively disposed between the two connecting plates and the base plate, and the two inclined plates, the base plate and the touch block form the deformation area.

[0009] In some embodiments, the thickness of the connecting plate and the base plate is greater than the thickness of the inclined plate.

[0010] In some embodiments, a limiting structure is further included, the limiting structure including a limiting block disposed on the base plate; Two limiting grooves are symmetrically arranged on the limiting block; Two limit pins are provided on the mounting block and are inserted into the limit groove.

[0011] In some embodiments, the circuit board includes a support portion disposed at the bottom of the base plate; An inclined portion is provided on one side of the support portion and is attached to the bottom surface of one of the inclined plates, and the sensor is provided at the bottom of the inclined portion; A connecting portion is provided on the other side of the support portion and extends outside the mounting groove.

[0012] In some embodiments, the sensing direction of the sensor is perpendicular to the inclined portion.

[0013] In some embodiments, the deformable frame is integrally formed with the touch block.

[0014] A pressure-sensing-based gesture recognition method includes: When the surface of the touch block is lightly touched, the touch block applies a slight downward force to the inclined plate through the connecting plate. Under this force, the inclined plate will deform slightly in one direction, and the deformation of the inclined plate will remain within a certain range. The sensor detects the deformation and does not detect an increasing trend. The circuit board provides feedback to identify this as a light touch gesture. When the surface of the touch block is pressed, the touch block applies a large downward force to the inclined plate through the connecting plate. Under this force, the inclined plate will deform significantly in one direction, and the deformation of the inclined plate will remain within a certain range. The sensor detects the deformation and does not detect an increasing trend, and the circuit board provides feedback to identify this as a pressing gesture. When a swipe is made on the surface of the touch block, the touch block will move laterally within the mounting groove. A lateral force is applied to the inclined plate through the connecting plate. Under this force, the inclined plate will deform significantly in one direction, and the deformation of the inclined plate will tend to increase. The sensor detects this deformation and trend and provides feedback through the circuit board to identify this as a swipe gesture.

[0015] In some embodiments, the direction of deformation of the ramp detected by the sensor can be used to identify whether the gesture is a left or right swipe.

[0016] The above-described technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: This invention forms a trapezoidal deformation frame with a base plate, an inclined plate, a connecting plate, and a touch block. A sensor is set on the circuit board at the corresponding position of one of the inclined plates. The sensor detects the bending direction, deformation magnitude, and whether there is an increasing trend of the inclined plate, and compares it with the set relevant parameters. Thus, a single sensor can realize the recognition of four gestures: swipe left, swipe right, tap, and press. The overall structure is simple, which simplifies the production process and reduces equipment costs.

[0017] In this invention, the thickness of the inclined plate is less than that of the base plate and the connecting plate, thereby forming a stiffness gradient in the deformation frame. This ensures that the inclined plate is the main deformation part when the deformation frame is under stress, avoiding interference from the deformation of the connecting plate and the base plate on the identification, and improving the sensitivity of the inclined plate deformation and the accuracy of the sensor. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention on the fixed shell; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a structural schematic diagram of the identification module of the present invention from another perspective; Figure 4 This is the front view of the identification module of the present invention; Figure 5 This is a front view of the phase-change frame and touch block during a light touch gesture according to the present invention; Figure 6 This is a front view of the phase-change frame and touch block during a press gesture according to the present invention; Figure 7 This is a front view of the phase-change frame and touch block during a left swipe gesture in this invention; Figure 8 This is a front view of the phase-change frame and touch block during a right swipe gesture in this invention.

[0020] In the diagram: 1. Fixed shell; 2. Mounting groove; 3. Mounting block; 31. Sealing plate; 32. Mounting column; 4. Deformation frame; 41. Connecting plate; 42. Inclined plate; 43. Base plate; 5. Touch block; 6. Deformation area; 7. Circuit board; 71. Support part; 72. Connecting part; 73. Inclined part; 8. Sensor; 9. Limiting structure; 91. Limiting block; 92. Limiting groove; 93. Limiting pin. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] refer to Figure 1-4A pressure-sensitive gesture recognition device includes a mounting block 3, a deformable frame 4, a touch block 5, a circuit board 7, and a sensor 8. The mounting block 3 can be placed in a pre-reserved mounting position on the electronic product to be installed. A corresponding groove can be machined into the frame of the electronic product to place the recognition device on the shell of the electronic product. The mounting block 3 is a basic support component, which can be placed in the mounting groove 2 and can be secured by adhesive bonding, providing a reliable mounting foundation for the entire module. The deformation frame 4 is mounted on the mounting block 3 and can deform under stress. The touch block 5 is mounted on the deformation frame 4. The touch block 5 can be made of hard materials such as aluminum alloy or stainless steel. The deformation of the touch block 5 is less than that of the deformation frame 4 to prevent its deformation from exceeding that of the deformation frame 4, thereby affecting the detection effect of the sensor 8 and thus affecting the recognition of gestures. The surface of the touch block 5 can be provided with anti-slip texture and other materials such as rubber can be attached to the surface to improve the feel of touch operation and form a deformation zone 6 with the deformation frame 4. When the touch block 5 is subjected to external force, it can transfer the force to the deformation frame 4, causing the deformation frame 4 to produce corresponding radial bending deformation in the deformation zone 6. Circuit board 7 is located at the bottom of the deformable frame 4. It can integrate key circuit modules such as amplifier circuits, filter circuits, and analog-to-digital converters. The design can be customized according to actual needs. Sensor 8 is located on and electrically connected to circuit board 7. Sensor 8 can be a deformation sensor or a pressure sensor. Sensor 8 senses the deformation of the deformable frame 4 and, through analysis of the deformation, recognizes gestures. Circuit board 7 can also include an analysis module to analyze the data fed back by sensor 8 to recognize corresponding gestures.

[0026] In some embodiments, the device includes a fixed housing 1 and a mounting groove 2. The fixed housing 1 provides an installation structure for the identification module, and the identification device can be assembled as a whole through the fixed housing 1, which facilitates installation on electronic products and protects them to ensure stable operation. The mounting groove 2 is provided on the fixed housing 1. The shape of the mounting groove 2 can be designed according to the identification device and can be fixed by adhesive, which facilitates the installation of the identification device. The top of the mounting groove 2 is provided with an opening, which allows the top of the touch block 5 to be exposed, thereby facilitating touch during identification operation.

[0027] In some embodiments, the mounting block 3 includes a sealing plate 31 and mounting posts 32 to achieve precise assembly with the mounting groove 2 and stable support of the deformation frame 4. The sealing plate 31 is inserted into the mounting groove 2 and can be fixed by adhesive. Two mounting posts 32 are symmetrically arranged on the sealing plate 31, can be welded and fixed, and can be embedded in the positioning holes in the mounting groove 2 to form a three-point support structure to ensure the installation accuracy of the mounting block 3. A deformation frame 4 is provided between the two mounting posts 32 to provide installation space for the deformation frame 4.

[0028] In some embodiments, the deformation frame 4 includes two connecting plates 41, a base plate 43, and two inclined plates 42. The two connecting plates 41 are symmetrically arranged on both sides of the bottom of the touch block 5 and can be bonded to the bottom of the touch block 5 with silicone adhesive or fixed by welding. The base plate 43 is arranged parallel to the two base plates 43 and is fixed to the top of the mounting column 32 of the mounting block 3 by bolts, forming the bottom support of the deformation frame 4. The two inclined plates 42 are respectively arranged between the two connecting plates 41 and the base plate 43 and can be fixed by welding. They can be made of 0.5mm thick beryllium bronze alloy, and the specific material and thickness can be set according to the actual use requirements. The inclination angle can be 45°. The two inclined plates 42, the base plate 43, and the touch block 5 form a trapezoidal deformation zone 6. When the touch block 5 is compressed, the inclined plates 42 undergo bending deformation through the transmission of the connecting plates 41. The two ends of the inclined plate 42, together with the connecting plate 41 and the base plate 43, can form a lever structure. The farther the same pressure is from the fulcrum, the larger the input lever arm, and the greater the deformation of the inclined plate 42.

[0029] In some embodiments, the thickness of the connecting plate 41 and the base plate 43 is greater than the thickness of the inclined plate 42. The thickness difference is designed to form a stiffness gradient of the deformation frame 4, ensuring that the inclined plate 42 becomes the main deformation part when the deformation frame 4 is under force, thereby avoiding interference from the deformation of the connecting plate 41 and the base plate 43 under force on the identification, and thus improving the sensitivity of the deformation of the inclined plate 42 and the accuracy of the sensor 8.

[0030] In some embodiments, to ensure the motion stability of the deformable frame 4, a limiting structure 9 is also included. The limiting structure 9 includes a limiting block 91, two limiting grooves 92, and two limiting pins 93. The limiting block 91 is disposed on the base plate 43 and can be welded and fixed. Two parallel limiting grooves 92 are opened on the top surface. The cross-section can be rectangular. Molybdenum disulfide grease can be applied to the grooves to improve the lubricity of the inner wall of the limiting grooves 92. The two limiting pins 93 are disposed on the sealing plate 31 of the mounting block 3 and are inserted into the limiting grooves 92, which can be a clearance fit. When the deformable frame 4 is compressed, the limiting pins 93 cooperate with the limiting grooves 92 to provide lateral support force for the deformable frame 4, limit the lateral displacement of the deformable frame 4, and ensure the positional stability of the deformable frame 4.

[0031] In some embodiments, the circuit board 7 includes a support portion 71, an inclined portion 73, and a connecting portion 72, which can realize the precise fit of the sensor 8 and signal transmission. The support portion 71 is located at the bottom of the base plate 43 and can be fixed to the bottom of the base plate 43 by screws, providing rigid support for the circuit board. The inclined portion 73 is located on one side of the support portion 71 and fits against the bottom surface of one of the inclined plates 42. The sensor 8 is located at the bottom of the inclined portion 73 and can be glued and fixed. The connecting portion 72 is located on the other side of the support portion 71 and extends to the outside of the mounting groove 2, which can connect to external signal lines. The connecting portion 72 can be Z-shaped, which can enhance the overall connection strength of the circuit board 7. At the same time, the connection position of the connecting portion 72 and the inclined portion 73 can be changed to facilitate the routing of the circuit board 7.

[0032] In some embodiments, the sensing direction of the sensor 8 is perpendicular to the tilt 73, that is, consistent with the normal direction of the inclined plate 42, to ensure maximum capture of the bending strain of the inclined plate 42, improve the sensitivity of the measurement, and thus improve the accuracy of the identification.

[0033] In some embodiments, the deformable frame 4 and the touch block 5 are integrally formed by CNC machining, which can enhance the connection strength between the deformable frame 4 and the touch block 5, thereby improving the service life of the recognition device.

[0034] refer to Figure 3-5 A pressure-sensing-based gesture recognition method includes: when the surface of the touch block 5 is lightly touched, the touch block 5 is subjected to a slight downward force, and the connecting plate 41 applies a slight downward force to the inclined plate 42. Under this force, the two inclined plates 42 will undergo slight outward deformation, and the deformation of the two inclined plates 42 will remain within a certain range. The sensor 8 detects the deformation and does not detect an increasing trend, and feeds the data back to the circuit board 7. The circuit board 7 compares the data, and if the data is within the light touch range, the circuit board 7 recognizes that it is a light touch gesture.

[0035] refer to Figure 6 When the surface of the touch block 5 is pressed, the touch block 5 is subjected to a large downward force, which is applied to the inclined plate 42 through the connecting plate 41. Under this force, the inclined plate 42 will deform outwards significantly, and the deformation of the inclined plate 42 will remain within a certain range. The sensor 8 detects the deformation and does not detect an increasing trend, and feeds the data back to the circuit board 7. The circuit board 7 compares the data and finds that it is within the pressing range. The circuit board 7 then recognizes that this is a pressing gesture.

[0036] refer to Figure 7When swiping left on the surface of touch block 5, the touch block 5 will move to the left in the mounting groove 2 due to friction. The connecting plate 41 applies a leftward pushing force to the inclined plate 42. One inclined plate 42 (corresponding to the sensor 8) will bend outward under this force, and the other inclined plate 42 will bend inward under this force. The deformation of both inclined plates 42 tends to increase. The sensor 8 detects the deformation and trend and feeds the data back to the circuit board 7. The circuit board 7 compares the data. The data is within the left swipe range, the bending deformation direction is inward, and it has an increasing trend. The circuit board 7 recognizes that this is a left swipe gesture.

[0037] refer to Figure 8 When the touch block 5 is swiped to the right, the touch block 5 will move to the right in the mounting groove 2 due to friction. The connecting plate 41 applies a rightward pushing force to the inclined plate 42. One inclined plate 42 (corresponding to the sensor 8) will bend inward under this force, and the other inclined plate 42 will bend outward under this force. The deformation of both inclined plates 42 tends to increase. The sensor 8 detects the deformation and trend and feeds the data back to the circuit board 7. The circuit board 7 compares the data. The data is within the right swipe range, the bending deformation direction is outward, and it has an increasing trend. The circuit board 7 recognizes that this is a right swipe gesture.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure-sensing gesture recognition device, characterized in that: Including mounting block (3); Deformation frame (4), the deformation frame (4) is disposed on the mounting block (3); Touch block (5), the touch block (5) is disposed on the deformable frame (4) and forms a deformable area (6) with the deformable frame (4); Circuit board (7), the circuit board (7) is disposed at the bottom of the deformable frame (4); Sensor (8), the sensor (8) is disposed on the circuit board (7) and electrically connected to the circuit board (7), the sensor (8) can sense the deformation of the deformable frame (4); The deformable frame (4) includes two connecting plates (41), which are symmetrically arranged on both sides of the bottom of the touch block (5); The base plate (43) is arranged parallel to the two connecting plates (41); Two inclined plates (42) are respectively disposed between the two connecting plates (41) and the bottom plate (43). The two inclined plates (42), the bottom plate (43) and the touch block (5) form the deformation area (6).

2. The pressure-sensing gesture recognition device according to claim 1, characterized in that: The mounting block (3) includes a sealing plate (31), which is disposed on one side of the deformable frame (4); Two mounting posts (32) are symmetrically arranged on the sealing plate (31), and the deformation frame (4) is provided between the two mounting posts (32).

3. The pressure-sensing gesture recognition device according to claim 1, characterized in that: The thickness of the connecting plate (41) and the base plate (43) is greater than the thickness of the inclined plate (42).

4. The gesture recognition device based on pressure sensing according to claim 1, characterized in that: It also includes a limiting structure (9), which includes a limiting block (91) and the limiting block (91) is disposed on the base plate (43); Two limiting grooves (92) are symmetrically arranged on the limiting block (91); Two limit pins (93) are provided on the mounting block (3) and are inserted into the limit groove (92).

5. A pressure-sensing-based gesture recognition device according to claim 1, characterized in that: The circuit board (7) includes a support (71) which is located at the bottom of the base plate (43); Inclined portion (73), the inclined portion (73) is provided on one side of the support portion (71) and attached to the bottom surface of one of the inclined plates (42), and the sensor (8) is provided at the bottom of the inclined portion (73). A connecting part (72) is provided on the other side of the support part (71).

6. A pressure-sensing-based gesture recognition device according to claim 5, characterized in that: The sensing direction of the sensor (8) is perpendicular to the inclined part (73).

7. A pressure-sensing-based gesture recognition device according to claim 1, characterized in that: The deformable frame (4) and the touch block (5) are integrally formed.

8. A pressure-sensing-based gesture recognition method, using a pressure-sensing-based gesture recognition device as described in any one of claims 1-7, characterized in that: include: When the surface of the touch block (5) is lightly touched, the touch block (5) applies a slight downward force to the inclined plate (42) through the connecting plate (41). Under this force, the inclined plate (42) will deform slightly in one direction, and the deformation of the inclined plate (42) will remain within a certain range. The sensor (8) detects the deformation and does not detect an increasing trend. The feedback is provided through the circuit board (7) to identify that this is a light touch gesture. When the surface of the touch block (5) is pressed, the touch block (5) applies a large downward force to the inclined plate (42) through the connecting plate (41). Under this force, the inclined plate (42) will deform in one direction and the deformation of the inclined plate (42) will remain within a certain range. The sensor (8) detects the deformation and does not detect an increasing trend. The sensor (7) provides feedback and identifies the press gesture. When sliding on the surface of the touch block (5), the touch block (5) will move laterally in the mounting groove (2), and the connecting plate (41) will apply a lateral force to the inclined plate (42). Under this force, the inclined plate (42) will deform in one direction, and the deformation of the inclined plate (42) will tend to increase. The sensor (8) detects the deformation and trend, and feeds back through the circuit board (7) to identify that this is a sliding gesture.

9. A gesture recognition method based on pressure sensing according to claim 8, characterized in that: Based on the direction of deformation of the inclined plate (42) detected by the sensor (8), it can be identified that the gesture is a left or right swipe.

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