CN111984157A

CN111984157A - Gesture recognition device and lifting device

Info

Publication number: CN111984157A
Application number: CN202010772595.8A
Authority: CN
Inventors: 陆小健; 赖春成
Original assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Current assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2020-11-24

Abstract

The invention relates to the field of intelligent recognition, in particular to a gesture recognition device and a lifting device. The gesture recognition device comprises a sensor for sensing gestures and generating sensing signals and a processor for performing gesture recognition on the sensing signals, and is characterized in that the sensor comprises a first conducting layer, an insulating layer and a second conducting layer which are sequentially arranged from top to bottom, the first conducting layer is provided with an RX electrode and a TX electrode which are used for forming an electric field, and the gesture recognition device further comprises a signal enhancement circuit which is connected with the RX electrode or/and the TX electrode and is used for enhancing the electric field. By using the present invention, the following effects can be achieved: the electric field between the RX electrode and the TX electrode is strengthened through the signal enhancement circuit, so that a user can make a gesture at a position far away from the gesture recognition device, and the user experience is improved.

Description

Gesture recognition device and lifting device

Technical Field

The invention relates to the field of intelligent recognition, in particular to a gesture recognition device and a lifting device.

Background

Gesture recognition: as the name implies, the ability of the core controller to read and understand human upper limb gestures, and based thereon, also to send control commands based on that understanding. The current research on gesture recognition aims to design and develop a system in which a core controller takes gesture recognition as input and maps the gesture recognition as output to realize control over an actuator. Generally, the gesture recognition can be classified into contact gesture recognition and non-contact gesture recognition according to the distinction of the gesture capturing sensor.

As one of non-contact gesture recognition, the 3D gesture sensing module is based on an electric field induction principle, a core element of the 3D gesture sensing module is a 3D gesture recognition chip, and a 3D signal processing unit can process gesture signals so as to recognize different gesture instructions. The gesture recognition module further comprises an electric field of a transmitter and a receiver, and the design and the layout of the gesture recognition module need to be carried out according to certain rules, so that a good gesture recognition effect is achieved. However, in the existing non-contact gesture recognition technology based on the electric field sensing principle, because an electric field signal is weak, a user can only operate near the 3D gesture sensing module and can be sensed by the 3D gesture sensing module to sense a gesture signal, and therefore user experience is affected.

Disclosure of Invention

In order to solve the above problems, the present invention provides a gesture recognition device and a lifting device.

The gesture recognition device comprises a sensor used for sensing gestures and generating sensing signals and a processor used for performing gesture recognition on the sensing signals, wherein the sensor comprises a first conducting layer, an insulating layer and a second conducting layer which are sequentially arranged from top to bottom, the first conducting layer is provided with an RX electrode and a TX electrode which are used for forming an electric field, and the gesture recognition device further comprises a signal enhancement circuit which is connected with the RX electrode or/and the TX electrode and is used for enhancing the electric field.

Preferably, the signal enhancement circuit comprises a boost regulator U1 for performing boost regulation on the input voltage, a level converter U2 connected with the boost regulator U1 and used for performing further boost conversion on the output voltage of the boost regulator U1, and further comprises a capacitor C1, an inductor L1, a diode D1, resistors R1 and R2, one end of the capacitor C1 is connected with a common ground, the other end of the capacitor C1 is connected with an input voltage end, the VIN end and the EN end of the boost regulator U1 are connected with the input voltage end, the GND end of the boost regulator U1 is connected with the common ground, the SW end of the boost regulator U1 is connected with one end of the inductor L1 and the anode of the diode D1, the FB end of the boost regulator U1 is connected with one end of the resistor R1 and one end of the resistor R2, the other end of the inductor L1 is connected with the input voltage end, the other end of the resistor R573R 5 is connected with the cathode of the diode D1, the other end of the resistor R2 is connected with a common ground, and the output end of the level shifter U2 is connected with an RX electrode or/and a TX electrode.

Preferably, the signal enhancement circuit further comprises capacitors C2 and C3, one end of the capacitor C2 is connected to the input end of the level shifter U2, the other end of the capacitor C3 is connected to the common ground, and one end of the capacitor C3 is connected to the input end of the level shifter U2, and the other end of the capacitor C3 is connected to the common ground.

Preferably, the signal enhancement circuit comprises a voltage follower U3 for amplifying the input current, and the output end of the voltage follower U3 is connected with the RX electrode or/and the TX electrode.

Preferably, the first conductive layer and the second conductive layer are separated by 0.5 mm-2 mm.

Preferably, the RX electrodes and the TX electrodes are symmetrically distributed on the first conductive layer.

Preferably, the distance between the RX electrode and the TX electrode is kept between 3mm and 5 mm.

The lifting device comprises a controller, a lifting mechanism connected with the controller and a gesture recognition device connected with the controller.

Preferably, the portable electronic device further comprises a lifting desktop, wherein the lifting desktop is provided with a mounting hole, and the gesture recognition device is arranged in the mounting hole.

Preferably, still including the lift desktop, gesture recognition device includes the recognition device body, with this body coupling of recognition device be used for sending control command's button module and shell, the controller receives the control command of button module and controls elevating system, the shell is fixed in the lower surface of lift desktop, the button module telescopic is located in the shell.

1. An electric field between the RX electrode and the TX electrode is strengthened through the signal enhancement circuit, so that a user can make a gesture at a position far away from the gesture recognition device, and the user experience is improved;

the TX electrode and the RX electrode are arranged on the same layer, and the signal intensity is higher because no insulating layer is interfered between the TX electrode and the RX electrode. Therefore, when the user makes a gesture, the user can be farther away from the gesture recognition device, and the user experience is improved.

By using the present invention, the following effects can be achieved:

in the embodiment, the lifting device recognizes the gesture by using the gesture recognition device, and controls the lifting or lowering of the lifting device according to the specific gesture. In the control of the lifting device, a direct contact process is avoided.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural diagram of a gesture recognition apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a sensor in a gesture recognition apparatus according to an embodiment of the present invention;

FIG. 3 is a circuit diagram of a signal enhancement circuit in a gesture recognition apparatus according to an embodiment of the present invention;

FIG. 4 is another circuit diagram of a signal enhancement circuit in a gesture recognition apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an RX electrode and a TX electrode in a gesture recognition apparatus according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a lifting device according to a second embodiment of the present invention;

fig. 7 is a schematic view of a first mounting structure of a gesture recognition device in a lifting device according to a second embodiment of the present invention;

fig. 8 is a schematic view of a second mounting structure of the gesture recognition device in the lifting device according to the second embodiment of the invention.

Fig. 9 is a schematic structural diagram of a gesture recognition device in a lifting device according to a second embodiment of the present invention;

FIG. 10 is a schematic connection diagram of a key module in a gesture recognition apparatus of a lifting apparatus according to a second embodiment of the present invention;

fig. 11 is a schematic diagram of an internal structure of a gesture recognition device in a lifting device according to a second embodiment of the present invention.

Wherein, 1-sensor; 2-a processor; 11-a first conductive layer; 12-an insulating layer; 13-a second conductive layer; 14-RX electrode; 15-TX electrode; 16-a boost circuit; 101-a controller; 102-a lifting mechanism; 103-gesture recognition means; 104-lifting the desktop; 1031-identifying the apparatus body; 1032-key module; 1033-a housing; 1034-nixie tube; 1035-Ring indicator light.

Detailed Description

The technical solutions of the present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

Example one

A first embodiment of the present invention provides a gesture recognition apparatus, as shown in fig. 1 to 2, including a sensor 1 for sensing a gesture and generating a sensing signal, and a processor 2 for performing gesture recognition on the sensing signal, where the sensor 1 includes a first conductive layer 11, an insulating layer 12, and a second conductive layer 13, which are sequentially arranged from top to bottom, the first conductive layer is provided with an RX electrode 14 and a TX electrode 15 for forming an electric field, the second conductive layer 13 is connected to a common ground, and the first conductive layer further includes a signal enhancement circuit 16 connected to the RX electrode 14 or/and the TX electrode 15 for enhancing the electric field.

When a voltage is applied to the gesture recognition apparatus, a constant electric field is formed between the RX electrode 14 and the TX electrode 15. When a human hand or finger enters the electric field, the electric field is distorted. Due to the conductivity of the human body itself, the electric field lines are directed to the human hand and insulated from the ground. The processor measures the source of distortion according to the electric field changes at different positions and the received change signals, thereby judging the position and gesture of the human hand.

In one embodiment, RX electrodes 14 or/and TX electrodes 15 are boosted by signal enhancement circuit 16 to enhance the electric field. In an actual circuit, the voltage of one of the RX electrode 14 or the TX electrode 15 may be boosted, or the voltage of the RX electrode 14 and the TX electrode 15 may be boosted at the same time, so as to achieve the effect of strengthening the electric field, so that a user may make a gesture at a position farther from the gesture recognition device, thereby improving user experience.

Specifically, as shown in fig. 3, the signal enhancement circuit 16 includes a boost regulator U1 for performing boost regulation on the input voltage, and a level shifter U2 connected to the boost regulator U1 for further performing boost conversion on the output voltage of the boost regulator U1. The signal enhancement circuit 16 further includes a capacitor C1, an inductor L1, a diode D1, resistors R1, R2, wherein one end of the capacitor C1 is connected to a common ground, the other end of the capacitor C is connected to the input voltage terminal 5V, the VIN terminal and the EN terminal of the boost regulator U1 are connected to the input voltage terminal, the GND terminal of the boost regulator U1 is connected to the common ground, the SW terminal of the boost regulator U1 is connected to one end of the inductor L1 and the anode of the diode D1, the FB terminal of the boost regulator U1 is connected to one end of the resistor R1 and one end of the resistor R2, the other end of the inductor L1 is connected to the input voltage terminal, the other end of the resistor R1 is connected to the cathode of the diode D1 and the input end of the level shifter U2, the other end of the resistor R2 is connected to the common ground, and the output end of the level shifter U. The boost circuit further comprises capacitors C2 and C3, one end of the capacitor C2 is connected with the input end of the level shifter U2, the other end of the capacitor C3 is connected with the input end of the level shifter U2, and the other end of the capacitor C3 is connected with the common ground.

The boost regulator U1 can adjust the output voltage according to actual requirements, for example, when the gesture recognition device is installed under a shield, the output voltage needs to be increased, or the output voltage can be adjusted according to the shielding capability of the shield against the electric field. Under normal conditions, the output voltage is controlled to be 12-18V.

In an embodiment, the RX electrode 14 or/and the TX electrode 15 may also be input current amplified by the signal enhancement circuit 16 to enhance the electric field. In an actual circuit, current amplification can be performed on one type of electrodes in the RX electrode 14 or the TX electrode 15, or current amplification can be performed on the RX electrode 14 and the TX electrode 15 at the same time, so that an effect of strengthening an electric field is achieved, and therefore a user can make a gesture at a position farther away from the gesture recognition device, and user experience is improved.

Specifically, as shown in fig. 4, the signal enhancement circuit 16 includes a voltage follower U3 for amplifying the input current, and the output terminal of the voltage follower U3 is connected to the RX electrode 14 or/and the TX electrode 15. The output impedance of the voltage follower U3 tends to zero, and the output voltage is not affected by the load impedance change in the output power range allowed by the operational amplifier, and is equivalent to a constant voltage source, and can provide the current required by the load, so that the voltage follower U3 can realize current amplification, thereby strengthening the electric field between the RX electrode 14 and the TX electrode 15.

In the prior art, the TX electrode is placed below the RX electrode, resulting in a weakening of the electric field due to the presence of the intermediate insulating layer. In this embodiment, the TX electrode and the RX electrode are disposed in the same layer, and since there is no interference of the insulating layer between the TX electrode and the RX electrode, the signal strength is greater. Therefore, when the user makes a gesture, the user can be farther away from the gesture recognition device, and the user experience is improved.

When the insulating layer is made of a PCB material (r is 5), the distance between the first conducting layer and the second conducting layer is 1mm-2 mm; when the insulating layer is of a plastic material (r <3), the distance is reduced to 0.5 mm. The first conducting layer and the second conducting layer are separated by 0.5 mm-2 mm.

The RX electrodes 14 and the TX electrodes 15 are symmetrically distributed on the first conductive layer. As shown in fig. 5, the sensor comprises four RX electrodes 14, one TX electrode 15, the four RX electrodes 14 being aligned in a rectangular frame along the sensor plate edges, which are named in four basic directions: north, west, south and east electrodes. The length of which should be arranged according to the length allowed by the size of the equipment. It is preferable to balance the lengths of the two vertical electrodes and the two horizontal electrodes, and if the recognition range should remain symmetrical in both directions, the electrodes should be designed symmetrically, with a suggested distance between the two RX electrodes 14 of 1.5 mm. The TX electrode 15 is placed in the center of the RX electrode 14 frame, allowing openings and openings for the TX electrode 15, but it is recommended that the TX electrode 15 cover 70% -80% of the electrode area.

It should be noted that the distribution of the RX electrodes 14 and the TX electrodes 15 may also be in other shapes, for example, four RX electrodes 14 form a ring, and the TX electrodes 15 are disposed in the middle of the ring frame.

To limit noise coupling between the TX electrode 15 and the RX electrode 14, the distance between the RX electrode 14 and the TX electrode 15 must be kept between 3mm and 5 mm.

Example two

A second embodiment of the present invention provides a lifting device, as shown in fig. 6, including a controller 101, a lifting mechanism 102 connected to the controller, and a gesture recognition device 103 connected to the controller in the first embodiment.

Traditional elevating gear passes through the button or touch operation mode, and the contact in-process easily causes the pollution and spreads through the hand, is not suitable for places such as hospital, food industry that require high to sanitary condition.

In the embodiment, the lifting device recognizes the gesture by using the gesture recognition device, and controls the lifting or lowering of the lifting device according to the specific gesture. During the control of the lifting device, the process of contacting is avoided.

In an embodiment, as shown in fig. 7, the lifting device further includes a lifting table top 104, the lifting table top 104 is provided with a mounting hole, and the gesture recognition device 103 is disposed in the mounting hole. And the gesture recognition device is fixedly arranged in the mounting hole, so that the gesture recognition device is prevented from falling.

In an embodiment, as shown in fig. 8 to 10, the lifting device further includes a lifting table 104, the gesture recognition device 103 includes a recognition device body 1031, a key module 1032 connected to the recognition device body 1031 and used for sending a control command, and a housing 1033, the controller 101 receives the control command of the key module 1032 and controls the lifting mechanism 102, the housing 1033 is fixed on a lower surface of the lifting table, and the key module 1032 is telescopically disposed in the housing.

The lifting device can control the lifting mechanism 102 through the gesture recognition device 103, and can also control the lifting mechanism 102 to lift through the key module 1032. When the gesture recognition device 103 is used for control, the key module 1032 is arranged below the lifting table top 104, and the hidden design does not affect the beauty and use of the lifting device. When using button module 1032 control, locate button module 1032 outside the lift table through telescopic structure, convenience of customers's key operation realizes elevating system's lifting control. The key module 1032 can specifically perform key operation by using a common key or a touch screen key.

As shown in fig. 11, the retractable key module 1032 can be disposed in the housing by a spring snap, and can be ejected by pressing the key module 1032 and restored by pushing the key module 1032. The key module 1032 can also be arranged in the housing in a sliding rail design mode. It should be noted that the present invention does not limit the specific telescopic structure of the key module 1032 and the housing.

In one embodiment, as shown in fig. 9, gesture recognition device 103 further includes a nixie tube 1034 and a circular ring indicator light 1035. When the device enters a low power state, any gesture can be waken up, nixie tube 1034 and ring-shaped indicator light 1035 are on, and nixie tube 1034 displays the current height of the lifting desktop. When the system detects no gesture operation for a period of time, the system again enters a low power state, and the nixie tube 1034 and the annular indicator light 1035 are extinguished. It should be noted that the nixie tube 1034 in this embodiment may also be replaced by a TFT liquid crystal screen, an OLED, an electronic paper, an ink screen, or other display devices.

Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The gesture recognition device comprises a sensor for sensing gestures and generating sensing signals and a processor for performing gesture recognition on the sensing signals, and is characterized in that the sensor comprises a first conducting layer, an insulating layer and a second conducting layer which are sequentially arranged from top to bottom, the first conducting layer is provided with an RX electrode and a TX electrode which are used for forming an electric field, and the gesture recognition device further comprises a signal enhancement circuit which is connected with the RX electrode or/and the TX electrode and is used for enhancing the electric field.

2. The gesture recognition device according to claim 1, wherein the signal enhancement circuit comprises a boost regulator U1 for performing boost regulation on the input voltage, and a level shifter U2 connected with the boost regulator U1 for performing further boost conversion on the output voltage of the boost regulator U1, and further comprises a capacitor C1, an inductor L1, a diode D1, and resistors R1 and R2, wherein one end of the capacitor C1 is connected with a common ground, the other end of the capacitor C1 is connected with an input voltage end, the VIN end and the EN end of the boost regulator U1 are connected with the input voltage end, the GND end of the boost regulator U1 is connected with the common ground, the SW end of the boost regulator U1 is connected with one end of the inductor L1 and the anode of the diode D1, the FB end of the boost regulator U1 is connected with one end of the resistor R1 and one end of the resistor R2, the other end of the inductor L1 is connected with the input voltage end, the other end of the resistor R5 is connected with the cathode of the diode D1 and the input end, the other end of the resistor R2 is connected with a common ground, and the output end of the level shifter U2 is connected with an RX electrode or/and a TX electrode.

3. The gesture recognition device of claim 2, wherein the signal enhancement circuit further comprises capacitors C2, C3, wherein one end of the capacitor C2 is connected to an input terminal of a level shifter U2, and the other end is connected to a common ground, and one end of the capacitor C3 is connected to an input terminal of a level shifter U2, and the other end is connected to the common ground.

4. The gesture recognition device of claim 1, wherein the signal enhancement circuit comprises a voltage follower U3 for amplifying an input current, an output terminal of the voltage follower U3 being connected to an RX electrode or/and a TX electrode.

5. The gesture recognition device of claim 1, wherein the first conductive layer is separated from the second conductive layer by 0.5mm to 2 mm.

6. The gesture recognition device of claim 1, wherein the RX and TX electrodes are symmetrically distributed on the first conductive layer.

7. The gesture recognition apparatus according to claim 1, wherein a distance between the RX electrode and the TX electrode is maintained between 3mm and 5 mm.

8. The lifting device comprises a controller and a lifting mechanism connected with the controller, and is characterized by further comprising the gesture recognition device according to any one of claims 1-7, wherein the gesture recognition device is connected with the controller.

9. The lifting device as claimed in claim 8, further comprising a lifting table top, wherein the lifting table top is provided with a mounting hole, and the gesture recognition device is disposed in the mounting hole.

10. The lifting device as claimed in claim 8, further comprising a lifting desktop, wherein the gesture recognition device comprises a recognition device body, a key module connected with the recognition device body and used for sending a control command, and a housing, the controller receives the control command from the key module and controls the lifting mechanism, the housing is fixed on the lower surface of the lifting desktop, and the key module is telescopically arranged in the housing.