Gesture recognition device and method based on pressure sensing

Abstract

The invention discloses a gesture recognition device and method based on pressure induction, and relates to the technical field of gesture recognition, the gesture recognition 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 quantity of the deformation frame; the four gestures of left sliding, right sliding, light touch and pressing can be recognized through a single sensor, the production process is simplified, and the equipment cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gesture recognition, in particular to a gesture recognition device and method based on pressure sensing. BACKGROUND

[0002] At present, similar devices on the market mostly adopt double pressure sensors, capacitive sensing, pressure-sensitive ink and other schemes, which have the disadvantages of complex structure design, complicated production process, small sensing range, high cost and the like.

[0003] Gesture recognition technology is a way of realizing instruction input by sensing user hand actions, and existing schemes mostly adopt double pressure sensors, capacitive sensing, pressure-sensitive ink and other schemes.

[0004] However, pressure-sensitive ink printing, capacitive layer etching and other processes have very high requirements for environmental cleanliness, and require multiple photoetching and curing processes, and double pressure sensors need high-precision alignment assembly to realize pressure distribution detection, resulting in increased device thickness and reduced reliability. The above-mentioned schemes have complex structure design, complicated production process and high cost. SUMMARY

[0005] The purpose of the present application is to provide a gesture recognition device and method based on pressure sensing, which can realize the recognition of four gestures of left swipe, right swipe, light touch and press by a single sensor, simplifying the production process and reducing the cost of the device.

[0006] The above-optimized structure of the present application is realized by the following technical scheme: a gesture recognition device based on pressure sensing, comprising 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; a sensor arranged on the circuit board and electrically connected with the circuit board, the sensor being capable of sensing the deformation amount of the deformation frame.

[0007] In some embodiments, the mounting block comprises a blocking plate arranged on one side of the deformation frame; two mounting columns symmetrically arranged on the blocking plate, and the deformation frame being arranged between the two mounting columns.

[0008] In some embodiments, the deformation frame comprises two connecting plates symmetrically arranged on both sides of the bottom of the touch block; a bottom plate arranged in parallel with the two bottom plates; Two inclined plates, two of the inclined plates are respectively arranged between two of the connecting plates and the bottom plate, and the two inclined plates, the bottom plate and the touch block form the deformation area.

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

[0010] In some embodiments, further comprising a limiting structure, the limiting structure comprises a limiting block, the limiting block is arranged on the bottom plate; Two limiting grooves, two of the limiting grooves are symmetrically arranged on the limiting block; Two limiting pins, two of the limiting pins are arranged on the mounting block and are inserted into the limiting grooves.

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

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

[0013] In some embodiments, the deformation frame and the touch block are integrally processed and formed.

[0014] A gesture recognition method based on pressure sensing, comprising: 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, the inclined plate will slightly deform in a direction under the action of the force, and the deformation amount of the inclined plate will remain within a certain range, the sensor detects the deformation amount and does not detect an increasing trend, and feedbacks through the circuit board, recognizing this time as a light touch gesture; When the surface of the touch block is pressed, the touch block applies a larger downward force to the inclined plate through the connecting plate, the inclined plate will deform greatly in a direction under the action of the force, and the deformation amount of the inclined plate will remain within a certain range, the sensor detects the deformation amount and does not detect an increasing trend, and feedbacks through the circuit board, recognizing this time as a press gesture; When sliding on the surface of the touch block, the touch block moves laterally in the mounting groove, a lateral force is applied to the inclined plate through the connecting plate, the inclined plate is deformed greatly in a direction under the action of the force, and the deformation amount of the inclined plate has a trend of increasing, the sensor detects the deformation direction, the deformation amount and the trend, and feeds back through the circuit board, and identifies that this is a sliding gesture.

[0015] In some embodiments, according to the direction of the deformation of the inclined plate detected by the sensor, a left or right sliding gesture can be identified.

[0016] The one or more technical solutions described above in the embodiments of the present application have at least the following technical effects or advantages: The present application forms a deformation frame in a trapezoidal structure by the bottom plate, the inclined plate, the connecting plate and the touch block, and sets a sensor on the circuit board corresponding to the position of one of the inclined plates, detects the bending direction, the deformation amount and whether there is an increasing trend of the inclined plate through the sensor, and compares with the set related parameters, so that the identification of the four gestures of left sliding, right sliding, tapping and pressing can be realized through a single sensor, the overall structure is simple, the production process is simplified, and the equipment cost is reduced.

[0017] The thickness of the inclined plate is less than the thickness of the bottom plate and the connecting plate, so as to form a stiffness gradient of the deformation frame, ensure that the inclined plate is the main deformation part when the deformation frame is stressed, avoid the interference of the deformation of the connecting plate and the bottom plate on the identification, improve the sensitivity of the deformation of the inclined plate, and improve the accuracy of the sensor. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating any creative labor.

[0019] Figure 1 It is a structural schematic diagram of the present application on the fixed shell. Figure 2 It is a structural schematic diagram of the present application. Figure 3 It is a structural schematic diagram of another view of the recognition module of the present application. Figure 4 It is a front view of the recognition module of the present application. Figure 5 It is a front view of the phase change frame and the touch block when the tapping gesture of the present application. Figure 6 It is a front view of the phase change frame and the touch block when the pressing gesture of the present application. Figure 7 Figure 1 is a front view of a phase change frame and a touch block when a left sliding gesture is performed according to the present application; Figure 8 Figure 2 is a front view of a phase change frame and a touch block when a right sliding gesture is performed according to the present application.

[0020] In the figure: 1, fixed shell; 2, mounting groove; 3, mounting block; 31, blocking plate; 32, mounting column; 4, deformation frame; 41, connecting plate; 42, inclined plate; 43, bottom 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 DESCRIPTION

[0021] Embodiments of the present application are described in detail below with reference to the accompanying drawings, wherein the same or similar notations are used to 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 are intended to explain the present application, and should not be understood as limiting the present application.

[0022] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0024] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Reference Figures 1-4The utility model provides a gesture recognition device based on pressure sensing, including installation block 3, deformation frame 4, touch block 5, circuit board 7, sensor 8, installation block 3 can be arranged in the installation position reserved in the electronic product to be installed, can be processed and leave the corresponding recess on the frame of electronic product, to place the recognition device on the shell of electronic product, installation block 3 is the basic support component, can be arranged in the installation slot 2, can be ensured firm by bonding, can provide reliable installation base for whole module, deformation frame 4 is arranged on installation block 3, can be deformed when being stressed, touch block 5 is arranged on deformation frame 4, touch block 5 can be made of hard material such as aluminum alloy or stainless steel, the deformation of touch block 5 is less than the deformation of deformation frame 4, can prevent its deformation from exceeding the deformation of deformation frame 4, to affect the detection effect of sensor 8, and then affect the recognition of gesture, the surface of touch block 5 can be provided with anti -skid texture, and other materials such as rubber can be pasted on the surface, to improve the feeling of touch operation, and form deformation area 6 with deformation frame 4, when touch block 5 is acted on by external force, the force can be transmitted to deformation frame 4, to make deformation frame 4 produce corresponding radial bending deformation in deformation area 6, circuit board 7 is arranged on the bottom of deformation frame 4, and the key circuit modules such as amplification circuit, filter circuit and analog-digital converter can be integrated on it, and the actual demand can be designed, sensor 8 is arranged on circuit board 7 and is electrically connected with circuit board 7, sensor 8 can be a deformation sensor, can be a pressure sensor, the deformation of deformation frame 4 can be sensed through sensor 8, and the recognition of gesture is realized through the judgment and analysis of deformation.

[0026] In some embodiments, the fixed shell 1 can provide an installation structure for the recognition module, and the overall assembly of the recognition device can be realized through the fixed shell 1, so that the installation on the electronic product is facilitated, and the recognition device can be protected to ensure stable operation. The installation slot 2 is arranged on the fixed shell 1, and the shape of the installation slot 2 can be designed according to the recognition device. The installation slot 2 can be fixed by bonding, which facilitates the installation of the recognition device. The top of the installation slot 2 is provided with an opening, which facilitates the exposure of the top of the touch block 5, thereby facilitating touch during recognition operation.

[0027] In some embodiments, the installation block 3 includes a blocking plate 31 and installation columns 32 to realize precise assembly with the installation slot 2 and stable support of the deformation frame 4. The blocking plate 31 is inserted and matched with the installation slot 2 and can be fixed by bonding. The two installation columns 32 are symmetrically arranged on the blocking plate 31, can be fixed by welding, and can be embedded in the positioning holes in the installation slot 2 to form a three-point support structure, which ensures the installation precision of the installation block 3. The deformation frame 4 is arranged between the two installation columns 32 to provide installation space for the deformation frame 4.

[0028] In some embodiments, the deformation frame 4 includes two connecting plates 41, a bottom plate 43, and two inclined plates 42. The two connecting plates 41 are symmetrically arranged at the bottom of the touch block 5 and can be bonded to the bottom of the touch block 5 by silicone adhesive or fixed by welding. The bottom plate 43 is arranged in parallel with the two connecting plates 41 and is fixed on the top of the mounting column 32 of the mounting block 3 by bolts to form the bottom support of the deformation frame 4. The two inclined plates 42 are arranged between the two connecting plates 41 and the bottom plate 43 and can be fixed by welding. The inclined plates 42 can be made of 0.5mm thick beryllium bronze alloy, and the specific material and thickness can be set according to actual use requirements. The inclination angle can be 45°. The two inclined plates 42, the bottom plate 43, and the touch block 5 form a trapezoidal deformation area 6. When the touch block 5 is pressed, the connecting plate 41 transmits the pressure to make the inclined plate 42 bend and deform. The two end points of the inclined plate 42, the connecting plate 41, and the bottom plate 43 form a lever structure. The farther the pressure distance from the fulcrum, the greater the input arm, and the greater the deformation of the inclined plate 42.

[0029] In some embodiments, the thickness of the connecting plate 41 and the bottom plate 43 is greater than the thickness of the inclined plate 42. The thickness difference is designed to form the stiffness gradient of the deformation frame 4, ensuring that the inclined plate 42 becomes the main deformation part when the deformation frame 4 is stressed, thereby avoiding the interference of the deformation of the connecting plate 41 and the bottom plate 43 on recognition, and further 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 movement stability of the deformation frame 4, a limiting structure 9 is further included. The limiting structure 9 includes a limiting block 91, two limiting grooves 92, and two limiting pins 93. The limiting block 91 is arranged on the bottom plate 43 and can be fixed by welding. The top surface is provided with two parallel limiting grooves 92, which can be rectangular in cross-section. The inside of the groove can be coated with molybdenum disulfide grease to improve the lubricity of the inner wall of the limiting groove 92. The two limiting pins 93 are arranged on the plugging plate 31 of the mounting block 3 and are inserted and matched with the limiting grooves 92, which can be a clearance fit. When the deformation frame 4 is pressed, the limiting pin 93 cooperates with the limiting groove 92 to provide lateral support force for the deformation frame 4, limit the lateral displacement of the deformation frame 4, and ensure the position stability of the deformation frame 4.

[0031] In some embodiments, the circuit board 7 comprises a support part 71, an inclined part 73 and a connecting part 72, which can realize accurate fitting and signal transmission of the sensor 8. The support part 71 is arranged at the bottom of the bottom plate 43 and can be fixed to the bottom of the bottom plate 43 by screws to provide rigid support for the circuit board. The inclined part 73 is arranged on one side of the support part 71 and is attached to the bottom surface of one of the inclined plates 42. The sensor 8 is arranged at the bottom of the inclined part 73 and can be fixed by adhesion. The connecting part 72 is arranged on the other side of the support part 71 and extends out of the mounting groove 2, which can connect external signal lines. The connecting part 72 can be Z-shaped, which can enhance the overall connection strength of the circuit board 7 and change the connection position of the connecting part 72 and the inclined part 73 to facilitate wiring of the circuit board 7.

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

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

[0034] Reference Figures 3-5 A gesture recognition method based on pressure sensing, comprising: when tapping the surface of the touch block 5, the touch block 5 receives a slight downward force, which is transmitted to the inclined plates 42 through the connecting plates 41. The two inclined plates 42 will slightly deform outward under the action of the force, and the deformation amount of the two inclined plates 42 will remain within a certain range. The sensor 8 detects the deformation amount and does not detect an increasing trend, and feeds back the data to the circuit board 7. The circuit board 7 compares the data, which is within the tapping range, and feeds back that this is a tapping gesture.

[0035] Reference Figure 6 When pressing the surface of the touch block 5, the touch block 5 receives a larger downward force, which is transmitted to the inclined plates 42 through the connecting plates 41. The inclined plates 42 will deform outward under the action of the force, and the deformation amount of the inclined plates 42 will remain within a certain range. The sensor 8 detects the deformation amount and does not detect an increasing trend, and feeds back the data to the circuit board 7. The circuit board 7 compares the data, which is within the pressing range, and feeds back that this is a pressing gesture.

[0036] Reference Figure 7When the touch block 5 is right-slid on the surface of the touch block 5, the touch block 5 moves rightward in the installation groove 2 under the action of friction force, a leftward pushing force is applied to the inclined plates 42 through the connecting plates 41, one of the inclined plates 42 (corresponding to the sensor 8) is deformed and bent outward under the action of the pushing force, the other inclined plate 42 is deformed and bent inward under the action of the pushing force, and the deformation amounts of the two inclined plates 42 both have a trend of increasing, the sensor 8 detects the deformation amounts and the trend and feeds back the data to the circuit board 7, the circuit board 7 compares the data, the data is within the right-slid range, the bending deformation direction is outward, and the trend is increasing, and the circuit board 7 feeds back to recognize that this is a right-slid gesture.

[0037] Reference Figure 8 When the touch block 5 is right-slid on the surface of the touch block 5, the touch block 5 moves rightward in the installation groove 2 under the action of friction force, a leftward pushing force is applied to the inclined plates 42 through the connecting plates 41, one of the inclined plates 42 (corresponding to the sensor 8) is deformed and bent outward under the action of the pushing force, the other inclined plate 42 is deformed and bent inward under the action of the pushing force, and the deformation amounts of the two inclined plates 42 both have a trend of increasing, the sensor 8 detects the deformation amounts and the trend and feeds back the data to the circuit board 7, the circuit board 7 compares the data, the data is within the right-slid range, the bending deformation direction is outward, and the trend is increasing, and the circuit board 7 feeds back to recognize that this is a right-slid gesture.

[0038] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A pressure-sensing based gesture recognition device, characterized by: The installation block (3) comprises a blocking plate (31) arranged on one side of the deformation frame (4); The deformation frame (4) is arranged on the installation block (3); The touch block (5) is arranged on the deformation frame (4) and forms a deformation area (6) with the deformation frame (4); The circuit board (7) is arranged at the bottom of the deformation frame (4); The sensor (8) is arranged on the circuit board (7) and electrically connected with the circuit board (7), and the sensor (8) can sense the deformation amount of the deformation frame (4).

2. The gesture recognition device based on pressure sensing according to claim 1, characterized in that: The installation block (3) comprises a blocking plate (31) arranged on one side of the deformation frame (4); Two installation columns (32) are symmetrically arranged on the blocking plate (31), and the deformation frame (4) is arranged between the two installation columns (32).

3. The gesture recognition device based on pressure sensing according to claim 1, wherein: The deformation frame (4) comprises two connecting plates (41) symmetrically arranged on both sides of the bottom of the touch block (5); The bottom plate (43) is arranged in parallel with the two bottom plates (43); Two inclined plates (42) are respectively arranged between the two connecting plates (41) and the bottom plate (43), and the two inclined plates (42) form the deformation area (6) with the bottom plate (43) and the touch block (5).

4. The gesture recognition device based on pressure sensing as claimed in claim 3, wherein: The thickness of the connecting plate (41) and the bottom plate (43) is greater than the thickness of the inclined plate (42).

5. The gesture recognition device based on pressure sensing as claimed in claim 3, wherein: The limiting structure (9) comprises a limiting block (91) arranged on the bottom plate (43); Two limiting grooves (92) are symmetrically arranged on the limiting block (91); Two limiting pins (93) are arranged on the installation block (3) and are inserted into the limiting grooves (92).

6. The gesture recognition device based on pressure sensing as claimed in claim 3, wherein: The circuit board (7) comprises a support portion (71) arranged at the bottom of the bottom plate (43); An inclined portion (73) is arranged on one side of the support portion (71) and is attached to the bottom surface of one of the inclined plates (42), and the bottom of the inclined portion (73) is provided with the sensor (8); A connecting portion (72) is arranged on the other side of the support portion (71).

7. The gesture recognition device based on pressure sensing as claimed in claim 6, wherein: The sensing direction of the sensor (8) is perpendicular to the inclined portion (73).

8. The gesture recognition device based on pressure sensing as claimed in claim 1, wherein: The deformation frame (4) and the touch block (5) are integrally processed and formed.

9. A pressure-sensitive gesture recognition method using a pressure-sensitive gesture recognition device according to any one of claims 3-8, characterized in that: 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), the inclined plate (42) will slightly deform in one direction under the action of the force, and the deformation amount of the inclined plate (42) will remain within a certain range, the sensor (8) detects the deformation amount and does not detect the trend of increase, and feedbacks through the circuit board (7), and identifies that the current is a light touch gesture; ​ When pressing the surface of the touch block (5), the touch block (5) applies a greater downward force to the inclined plate (42) through the connecting plate (41), the inclined plate (42) will be greatly deformed in a direction under the force, and the deformation amount of the inclined plate (42) will remain within a certain range, the sensor (8) detects the deformation amount and does not detect the increasing trend, and feeds back through the circuit board (7), identifying this time as a pressing gesture; When sliding on the surface of the touch block (5), the touch block (5) will move horizontally in the installation groove (2), and apply a horizontal force to the inclined plate (42) through the connecting plate (41), the inclined plate (42) will be greatly deformed in a direction under the force, and the deformation amount of the inclined plate (42) will have a trend of increasing, the sensor (8) detects the deformation amount and the trend, and feeds back through the circuit board (7), identifying this time as a sliding gesture.

10. The gesture recognition method based on pressure sensing according to claim 9, wherein: According to the direction of the deformation of the inclined plate (42) detected by the sensor (8), it can be identified that this time is a left or right sliding gesture.

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