CN216053116U

CN216053116U - Gesture recognition equipment and data gloves

Info

Publication number: CN216053116U
Application number: CN202122583166.9U
Authority: CN
Inventors: 汤新才
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-03-15
Anticipated expiration: 2031-10-26

Abstract

The utility model discloses gesture recognition equipment and a data glove, which comprise a circuit board and a plastic optical fiber sensor, wherein the circuit board is provided with a plurality of first optical fibers; the circuit board is provided with a light source driving module, a data acquisition module, a calculation module, a communication module and a power supply module; the plastic optical fiber sensor comprises an LED light source, a sensitization plastic optical fiber, a photoelectric detector, a connecting structural member, a hollow hose and a fixed ring sheet; the communication module is used for communicating with an external terminal; the power supply module is used for supplying power to the gesture recognition equipment; the light source driving module is used for driving the LED light source; the data acquisition module is used for acquiring original data of the photoelectric detector; the calculation module is used for processing the original data. According to the utility model, the optical fiber sensor is applied to the technical field of gesture recognition, so that the advantage of gesture recognition is greatly improved.

Description

Gesture recognition equipment and data gloves

Technical Field

The utility model relates to the technical field of gesture interaction, in particular to gesture recognition equipment and a data glove.

Background

Gesture recognition may recognize human gestures through algorithms, and users may use simple gestures to control or interact with devices, letting computers understand human behavior. At present, gesture recognition can be applied to smart home, such as hardware devices such as intelligent household appliances, household robots and wearable devices, and the corresponding functions are controlled through gestures of a user, so that a man-machine interaction mode is more intelligent and natural.

Most of the existing gesture recognition adopts a visual sensor, such as a structured light sensor, a binocular or laser radar sensor, and the like, which is easily influenced by ambient light. With the development of science and technology, the optical fiber sensor is developing towards the directions of sensitivity, accuracy, strong adaptability, compactness and intellectualization. Fiber optic sensors have a number of excellent properties, such as: it is not influenced by ambient light, and has the performance of resisting electromagnetic and atomic radiation interference, and the mechanical properties of thin diameter, soft quality, light weight and the like. If the optical fiber sensor is applied to the technical field of gesture recognition, the advantage of gesture recognition is greatly improved.

The above background disclosure is only for the purpose of aiding understanding of the inventive concepts and solutions of the present invention, and it is not necessary for them to belong to the prior art of this patent application, and it should not be used for evaluating the novelty and inventive step of this patent application in the case that there is no clear evidence that the above contents are disclosed before the filing date of this patent application.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a gesture recognition device and a data glove, so as to solve at least one of the above-mentioned problems.

In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:

a gesture recognition device comprises a circuit board and a plastic optical fiber sensor; the circuit board is provided with a light source driving module, a data acquisition module, a calculation module, a communication module and a power supply module; the plastic optical fiber sensor comprises an LED light source, a sensitization plastic optical fiber, a photoelectric detector, a connecting structural member, a hollow hose and a fixed ring sheet; the communication module is used for communicating with an external terminal; the power supply module is used for supplying power to the gesture recognition equipment; the light source driving module is used for driving the LED light source; the data acquisition module is used for acquiring original data of the photoelectric detector; the calculation module is used for processing the original data.

In some embodiments, a through hole is formed in the hollow hose, through which the sensitized plastic optical fiber can pass, the sensitized plastic optical fiber is placed in the through hole, and two ends of the sensitized plastic optical fiber protrude out of the hollow hose.

In some embodiments, the connecting structure comprises a first connecting member and a second connecting member; the fixed ring piece comprises a first fixed ring piece and a second fixed ring piece; the LED light source is coupled with one end of the sensitization plastic optical fiber through a first connecting structural member, and the photoelectric detector is coupled with the other end of the sensitization plastic optical fiber through a second connecting structural member.

In some embodiments, the hollow hose and the first and second connecting members are respectively connected and fixed by the first and second fixing ring pieces.

In some embodiments, the sensitized plastic optical fiber, the LED light source, and the photodetector are arranged in coaxial butt-joint.

In some embodiments, one side of the sensitized plastic optical fiber is provided with a light leakage area, and the light leakage area is positioned on one side of the cross section of the optical fiber along the axis.

In some embodiments, the first and second connection structures are internally provided with spaces for accommodating the LED light source and the photodetector, respectively.

In some embodiments, the first connecting member and the second connecting member are fixedly connected to the first fixing ring piece and the second fixing ring piece by one or a combination of bonding and heat shrinking.

The other technical scheme of the utility model is as follows:

a data glove comprises the gesture recognition equipment and a glove body in any one of the technical schemes; the glove body is provided with at least one plastic optical fiber sensor corresponding to the finger joints so as to be used for detecting the bending angles of the finger joints, and the plastic optical fiber sensors are connected with the circuit board through leads.

In some embodiments, at least one plastic optical fiber sensor is arranged on the glove body corresponding to the wrist joint for detecting the bending direction and angle of the wrist.

The technical scheme of the utility model has the beneficial effects that:

compared with the prior art, the gesture recognition equipment and the data glove have the advantages that the optical fiber sensor is applied to the technical field of gesture recognition, and the advantages of gesture recognition are greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a gesture recognition device according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of a plastic fiber optic sensor of a gesture recognition device according to one embodiment of the present invention;

FIG. 3 is a schematic diagram of four structural shapes of a plastic optical fiber sensor of a gesture recognition device according to an embodiment of the utility model;

FIG. 4 is a schematic diagram of three structural shapes of a sensitized plastic optical fiber of a plastic optical fiber sensor of a gesture recognition device according to an embodiment of the utility model;

FIG. 5 is a perspective view of a data glove according to another embodiment of the present invention;

FIG. 6 is an illustration of another perspective structure of a data glove according to another embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the embodiments of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. The connection may be for fixation or for circuit connection.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way limiting of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 and 2, a gesture recognition apparatus 100 according to an embodiment of the present invention includes a circuit board 1 and a plastic optical fiber sensor 2; the circuit board 1 is provided with a light source driving module 10, a data acquisition module 11, a calculation module 12, a communication module 13 and a power supply module 14; the plastic optical fiber sensor 2 comprises an LED light source 20, a sensitization plastic optical fiber 21, a photoelectric detector 22, a connecting structural member, a hollow hose 24 and a fixed ring sheet; the communication module 13 is used for communicating with an external terminal; the power supply module 14 is used for supplying power to the gesture recognition device; the light source driving module 10 is configured to drive the LED light source 20; the data acquisition module 11 is used for acquiring raw data of the photoelectric detector 22; the calculation module 12 is used for processing the raw data. In some embodiments, the calculation module 12 calculates joint bending angles and gestures based on raw data of the photodetectors 22. It will be appreciated that in some embodiments, the calculation of joint bending angles and gestures may also be performed on the external terminal. The photodetector 22 is connected to the data acquisition module 11 through a lead 3.

In some embodiments, the light source driving module 10 may adjust the light emitting power of the LED light source 20 in addition to driving the LED light source, so as to improve the variability of the plurality of plastic optical fiber sensors 2; the data acquisition module 11 is configured to acquire original data of the photodetector 22, and adjust a resistance of a sampling resistor connected to the photodetector 22 to change the size of the original data; the data acquisition module 11 and the light source driving module 10 are matched to adjust the sensitivity of the plastic optical fiber sensor 2. Specifically, the light source driving module 10 is used to change the light emitting power of the LED light source 20, and the light emitting power of the LED light source 20 is positively correlated with the sensitivity of the plastic optical fiber sensor; and changing the resistance value of a sampling resistor connected with the photoelectric detector 22 by using the data acquisition module 11, wherein the resistance value of the sampling resistor is positively correlated with the sensitivity of the plastic optical fiber sensor.

In some embodiments, the LED light source 20 has a central wavelength of 400nm-1000nm, preferably 630nm, 650nm, 850nm, 940 nm.

Specifically, referring to fig. 1 and 2, the connecting structure includes a first connecting member 23 and a second connecting member 23'; the fixing ring piece comprises a first fixing ring piece 25 and a second fixing ring piece 25'; a through hole for the sensitization plastic optical fiber to pass through is arranged in the hollow hose 24, the sensitization plastic optical fiber 21 is placed in the through hole, and two ends of the sensitization plastic optical fiber 21 protrude out of the hollow hose 24; the LED light source 20 is coupled with one end of the sensitized plastic optical fiber 21 through a first connecting member 23, and the photodetector 22 is coupled with the other end of the sensitized plastic optical fiber 21 through a second connecting structure member 23'; the hollow hose 24, the first connecting member 23 and the second connecting member 23 'are respectively connected and fixed by the first fixing ring piece 25 and the second fixing ring piece 25'.

Specifically, the sensitized plastic optical fiber 21, the LED light source 20, and the photodetector 22 are arranged to be coaxially butted.

The plastic optical fiber sensor 2 adopts a light intensity demodulation principle, and one side of the sensitization plastic optical fiber 21 is provided with a light leakage area 210, so that light loss change can be generated during bending, and the positive and negative directions of the bending can be identified. The diameter range of the sensitization plastic optical fiber is 0.20mm to 2.00mm, the proportion of the surface area of the light leakage area in the total sensitization plastic optical fiber surface area is less than or equal to 50%, and the light leakage area is positioned on one side of the optical fiber along the axial section.

As shown in fig. 4 (a), (b), and (c), in some embodiments, the light leakage area 210 may be obtained by polishing a plastic optical fiber with a cladding layer made of PA, and removing a portion of the core and the cladding. The light leakage area 210 may be in a zigzag shape, a flat shape, or a frosted shape, and the shape is not particularly limited in the embodiment of the present invention, and any shape may be adopted as long as the shape does not depart from the gist of the present invention.

Specifically, the light leakage area 210 is defined as being located at the outer side of the bend as the forward bending direction, and being located at the inner side of the bend as the reverse bending direction, the transmission light loss of the sensitized plastic optical fiber is M, and the flat state light loss of the sensitized plastic optical fiber is set as M0. When the sensitization plastic optical fiber is positively bent from a straight state, M is increased; when the bending direction is reversed, M is reduced, so that the bending direction can be judged by comparing the sizes of M and M0.

In some embodiments, the light leakage area 210 may be obtained by removing a portion of the core and cladding by using a mold hot press molding method, a milling or grinding process molding method, a hand milling method, or the like.

In some embodiments, the LED light source 20 is an infrared emitting tube with a center wavelength of 940 nm; correspondingly, the photodetector 22 is an infrared receiving tube with a central wavelength of 940 nm. In some embodiments, the sensitization plastic optical fiber is made of a common bare plastic optical fiber with the diameter of 0.75mm after a part of a fiber core and a cladding are removed through polishing; the first fixing ring piece and the second fixing ring piece are PVC heat-shrinkable tubes, and the length of each PVC heat-shrinkable tube is 10 mm.

In some embodiments, the plastic optical fiber is fixed with the first connecting structural member and the second connecting structural member by gluing. Spaces for accommodating the LED light source and the photoelectric detector and connecting holes for allowing the sensitized plastic optical fibers to pass through are respectively arranged in the first connecting structural member and the second connecting structural member. In some embodiments, the first and second connecting members are made of a stainless steel material, i.e., POM. The hollow hose is made of silica gel, and is internally provided with a through hole for the bent sensitivity-enhanced plastic optical fiber to pass through.

In some embodiments, the connection and fixation of the sensitized plastic optical fiber with the first connection member and the second connection member is screw tightening and pressing.

The first connecting member and the second connecting member are connected and fixed with the first fixing ring piece and the second fixing ring piece in one or a combination of bonding and thermal shrinkage.

Referring to fig. 3 (a), (b), (c) and (d), in some embodiments, the cross-sectional shapes of the connecting structure and the hollow hose may be circular, triangular, square, trapezoid, etc.

The gesture recognition method provided by the embodiment of the utility model comprises the following steps:

s10, acquiring the angle of the finger joint based on the original data of the plastic optical fiber sensor;

in some embodiments, the method for acquiring the joint angle is to acquire the maximum light loss α 1 and the minimum light loss α 2 of the plastic optical fiber sensor at the joint through the opening and closing actions of the joint, and set the joint angle a1 corresponding to α 1 and the joint angle a2 corresponding to α 2, where the relationship between the real-time light loss α of the plastic optical fiber sensor and the real-time angle a of the joint is as follows: a ═ α - α 1)/(α 2- α 1)) × (a2-a1) + a 1. Specifically, the maximum degree of opening and closing grasping is performed by the fingers for multiple times to obtain the average value of the maximum light loss and the minimum light loss at the joints, and the joint angle is obtained through calibration. Wherein, the finger joints of the index finger, the middle finger, the ring finger and the little finger are not provided with plastic optical fiber sensors, and the bending angles of the finger joints of the four fingers are approximately equal to 2/3 of the bending angles of the interphalangeal joints of the fingers.

In some embodiments, the method for obtaining the joint angle includes obtaining a real-time joint angle a through a measurement device, obtaining a real-time light loss α through the data acquisition module, and obtaining a corresponding functional relationship between a and α through data fitting as follows: a ═ f (α).

S20, presetting the angle value or angle range of each joint of each gesture, establishing a database, and comparing the current angle value of each joint with the database through a calculation module after a user makes a certain gesture to calculate the current gesture.

According to the gesture recognition device and method provided by the embodiment of the utility model, the optical fiber sensor is applied to the technical field of gesture recognition, so that the advantage of gesture recognition is greatly improved.

Referring to fig. 5 and 6, as another embodiment of the present invention, a data glove 200 is further provided, which includes the gesture recognition device and the glove body according to any of the foregoing embodiments; the glove body is provided with at least one plastic optical fiber sensor 2 corresponding to the finger joints, the plastic optical fiber sensor 2 is used for detecting the bending angles of the finger joints, and the plastic optical fiber sensor 2 is connected with the circuit board 1 through a lead 3.

In some embodiments, at least one said plastic fiber sensor 2 is provided on the glove body corresponding to the wrist joint for detecting the bending direction and angle of the wrist.

In some embodiments, a spatial position sensor 4 is disposed on the glove body corresponding to the back of the hand for detecting the spatial position, the moving speed and the moving track of the hand; in some applications, the spatial position sensor 4 may select an inertial measurement unit IMU.

In some embodiments, the glove body is provided with L layers of flexible materials at the joint position, L is greater than or equal to 2, and the plastic optical fiber sensor is arranged between the upper layer of flexible material and the lower layer of flexible material and fixed at the joint position of the glove body in a sewing limiting manner.

In some embodiments, in order to detect gestures more comprehensively, the number of plastic optical fiber sensors can be increased, and particularly, the plastic optical fiber sensors can be arranged at joints of a finger wrist and at the open and close positions of the finger roots so as to detect the angles of the finger joints and the open and close angles of the finger roots. In other embodiments, of course, the plastic optical fiber sensor may be additionally disposed at other positions, and is not particularly limited in the embodiments of the present invention, and any arrangement may be adopted without departing from the spirit of the present invention, and the present invention shall fall within the protection scope of the present invention.

It is to be understood that the foregoing is a more detailed description of the utility model, and that specific embodiments are not to be considered as limiting the utility model. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the utility model, and these substitutions and modifications should be considered to fall within the scope of the utility model. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model.

In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the utility model as defined by the appended claims.

Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. One of ordinary skill in the art will readily appreciate that the above-disclosed, presently existing or later to be developed, processes, machines, manufacture, compositions of matter, means, methods, or steps, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.

Claims

1. A gesture recognition device, characterized by: the optical fiber sensor comprises a circuit board and a plastic optical fiber sensor; the circuit board is provided with a light source driving module, a data acquisition module, a calculation module, a communication module and a power supply module; the plastic optical fiber sensor comprises an LED light source, a sensitization plastic optical fiber, a photoelectric detector, a connecting structural member, a hollow hose and a fixed ring sheet; the communication module is used for communicating with an external terminal; the power supply module is used for supplying power to the gesture recognition equipment; the light source driving module is used for driving the LED light source; the data acquisition module is used for acquiring original data of the photoelectric detector; the calculation module is used for processing the original data.

2. The gesture recognition device of claim 1, wherein: the inside of the hollow hose is provided with a through hole for the sensitization plastic optical fiber to pass through, the sensitization plastic optical fiber is placed in the through hole, and two ends of the sensitization plastic optical fiber protrude out of the hollow hose.

3. The gesture recognition device of claim 2, wherein: the connecting structure comprises a first connecting component and a second connecting component; the fixed ring piece comprises a first fixed ring piece and a second fixed ring piece; the LED light source is coupled with one end of the sensitization plastic optical fiber through a first connecting structural member, and the photoelectric detector is coupled with the other end of the sensitization plastic optical fiber through a second connecting structural member.

4. The gesture recognition device of claim 3, wherein: the hollow hose, the first connecting component and the second connecting component are respectively connected and fixed through the first fixing ring piece and the second fixing ring piece.

5. The gesture recognition device of claim 4, wherein: the sensitized plastic optical fiber, the LED light source and the photoelectric detector are arranged to be coaxially butted.

6. The gesture recognition device of claim 5, wherein: one side of the sensitization plastic optical fiber is provided with a light leakage area, and the light leakage area is positioned on one side of the cross section of the optical fiber along the axis.

7. The gesture recognition device of claim 6, wherein: spaces for accommodating the LED light source and the photoelectric detector are respectively arranged in the first connecting structural member and the second connecting structural member.

8. The gesture recognition device of claim 7, wherein: the first connecting member and the second connecting member are connected and fixed with the first fixing ring piece and the second fixing ring piece in one or a combination of bonding and thermal shrinkage.

9. A data glove, characterized by: comprising a gesture recognition device according to any one of claims 1-8 and a glove body; the glove body is provided with at least one plastic optical fiber sensor corresponding to the finger joints so as to be used for detecting the bending angles of the finger joints, and the plastic optical fiber sensors are connected with the circuit board through leads.

10. The data glove of claim 9, wherein: the glove body is provided with at least one plastic optical fiber sensor corresponding to the wrist joint for detecting the bending direction and angle of the wrist.