CN115167687A - Space-time combined coding method based on vibrotactile and vibrotactile stimulation device - Google Patents

Abstract

The invention discloses a space-time combined coding method and a vibration-tactile stimulation device based on vibration and touch. The space-time combined coding method is based on graphics, and produces a vibration-tactile stimulation paradigm through multiple separate stimulations combined with space and time. A set of special vibration and tactile alphabets are formed. The vibration and tactile stimulation device transmits external information to the human body on the basis of order. The vibration and tactile stimulation device adopts a ring-shaped design to provide three-dimensional perception in space. The device of the present invention can act on three-dimensional sensing parts such as neck, waist and wrist, improve the influence of perception illusion on the user as much as possible through the pre-coded vibration and tactile stimulation paradigm, and transmit external information to the user through the vibration and tactile sensation, so that the user can obtain corresponding It has the characteristics of rapid learning, accurate identification, and efficient correspondence.

Description

Vibrotactile-based space-time combined coding method and vibrotactile stimulation device

technical field

The invention belongs to the technical field of haptic coding, and in particular relates to a space-time combined coding method based on vibration and touch and a vibration touch stimulation device.

Background technique

As an important source of information for the human body, touch has the characteristics of fast response and obvious perception. For visually impaired patients and other special groups, touch is one of the important ways to obtain information instead of vision. The tactile expression device converts the characteristic information of a specific environmental target into a specific sequence, and can transmit the target information to the user in a comprehensive, accurate and rapid manner under the condition of visual and auditory impairment or occupied visual and auditory channels and other special privacy requirements. The research on tactile expression technology refers to the study of vibration and tactile stimulation devices, the design of information coding schemes, and the transmission of certain information to users by generating specific tactile stimulation on the skin of specific parts of the human body.

Existing tactile sensing devices involve vibration and tactile stimulation on the tip of the tongue, waist, back, fingers, etc., and rarely involve the neck. At the same time, with different vibrotactile stimulation paradigms, the interaction between the spatial and temporal characteristics of stimuli may lead to perceptual illusions including motion illusion and localization illusion. In addition, the existing coding of vibrotactile information is generally based on the Braille code, and learning to associate the coded symbols with tactile perception requires a long time of repetition and extensive training, which is largely a problem for users to learn to use tactile perception. device obstacles.

SUMMARY OF THE INVENTION

Aiming at the shortcomings of the existing vibrotactile expression technologies, the present invention provides a vibrotactile-based space-time combination coding method and a vibrotactile stimulation device.

In order to achieve the above object, the technical scheme of the present invention is as follows:

The space-time combined coding method based on vibrotactile touch includes the following steps:

Graphically process the external information to be transmitted, and generate a graphic instruction, the graphic instruction includes multiple sites and M line segments with directional arrows connecting any two sites, where M is a natural number;

Encode graphics instructions to generate at least one group of vibration stimulation instructions combined with space and time;

Corresponding information, graphic instructions and vibration stimulation instructions one by one, and jointly construct a vibration-tactile alphabet coding table.

Further, the encoding of graphics instructions includes:

Perform numerical sequence on multiple positions in graphics instructions;

Take the non-arrow end of each line segment as the starting point and the arrow end as the end point, and read the numerical order of each site in sequence from the start point to the end point;

The M line segments are sorted and read according to the numerical order of their respective starting points in ascending order.

Further, the vibration stimulation instruction includes:

The vibration motors at two sites are used as a pair of vibration stimulation groups, and the two vibration motors generate a pair of vibration stimulation at separate intervals;

Two pairs of vibration stimulation groups that generate vibration stimulation at relative intervals constitute a set of vibration stimulation instructions, that is, a vibration-tactile stimulation paradigm combining space and time is generated.

Further, a group of the vibration stimulation instructions includes four vibration stimulations generated by a single vibration motor. In the first pair of vibration stimulation groups, the first vibration stimulation is the starting point, and the second vibration stimulation is the end point, and a spatial encoding is performed. , in the same way, in the second pair of vibration stimulation groups, the first vibration stimulation is the starting point, the second vibration stimulation is the end point, and the second spatial encoding is performed; the four vibration stimulations are started successively, which is the time encoding, that is, a kind of time encoding is generated. A vibrotactile stimulation paradigm combining space and time.

Another aspect of the present invention also provides a vibration tactile stimulation device, which includes a ring-shaped wearable device, several placement bags, N vibration motors and a control energy supply module, and the ring-shaped wearable device can be fitted to the three-dimensional sensing part of the human body; Distributed on the ring-shaped wearable device; N vibration motors are placed in a placement bag, N is a non-zero even number, and the number of vibration motors is selected according to needs. The vibration motors use components that can provide vibration stimulation, and each vibration motor is provided with The individual pins are respectively connected with the control energy supply module; the control energy supply module supplies energy to each vibration motor and modulates its vibration intensity.

Further, the control energy supply module controls the N vibration motors to work according to the vibration stimulation instructions obtained by the above coding method.

Further, the ring-shaped wearable device adopts a flexible material collar, wristband, or belt.

Further, the vibration motor adopts a coin motor.

Further, the control power supply module can generate a pulse width modulation drive signal, and the pulse width modulation drive signal modulates the vibration intensity of the vibration motor through a dedicated amplifier circuit.

Beneficial effects: the device of the present invention can act on the three-dimensional perception parts such as the neck, waist, and wrist, and improve the influence of perception illusion on the user as much as possible through a specific vibration and tactile stimulation paradigm. Combined with coding, and designed a set of simple and easy-to-recognize vibration tactile alphabet coding table. Realize the transmission of external information to the user through vibration and touch, so that the user can obtain the corresponding external information, with the characteristics of rapid learning, accurate identification, and efficient correspondence.

Description of drawings

1 is a schematic structural diagram of a ring-shaped device for providing vibration and tactile stimulation according to an embodiment of the present invention;

2 is a schematic diagram of a group of vibrotactile stimulation paradigms in an embodiment of the present invention;

FIG. 3 is a vibrotactile alphabet formed by a vibrotactile-based space-time combination coding method in an embodiment of the present invention.

In the picture, 1-ring collar, 2-placement bag, 3-vibration motor, 4-control energy supply module.

Detailed ways

The present invention will be described below with reference to specific examples. Those skilled in the art can understand that these examples are only for illustrating the present invention, and they do not limit the scope of the present invention in any way.

A vibration tactile stimulation device, which is worn on the neck as an example, as shown in Figure 1, includes an annular collar 1, several placing bags 2, four vibration motors 3 and a control energy supply module 4, and the annular collar 1 is made of elastic material. A number of placement bags 2 are distributed on the annular collar 1 at intervals of 1 cm; four vibration motors 3 are placed in the placement bag 2, and are evenly distributed among them. The coin motor stimulated by vibration, each vibration motor 3 is provided with a separate pin, which is respectively connected with the control energy supply module 4; the control energy supply module 4 supplies energy for each vibration motor 3 and modulates its vibration intensity; the control energy supply module 4. A pulse width modulated drive signal can be generated, and the pulse width modulated drive signal modulates the vibration intensity of the vibration motor 3 through a dedicated amplifier circuit. Wherein, the control energy supply module 3 controls the four vibration motors 3 to work according to the vibration stimulation instructions obtained by the following coding method.

The working principle of vibrotactile stimulation device:

(1) Select the external information to be transmitted, and transmit the information to the vibration and tactile stimulation device;

(2) The vibration-tactile stimulation device will find the corresponding vibration-stimulation instruction according to the pre-coded vibration-tactile letter code table of the received information;

(3) The control energy supply module 4 receives the vibration stimulation instruction, and starts the corresponding vibration motor 3 according to the coding rules;

(4) The vibration motor 3 vibrates according to the vibration stimulation command, and transmits the tactile sensation of human skin.

As shown in Figure 2 and Figure 3, taking 26 English letters as an example, on the other hand, the embodiment of the present invention also provides a space-time combined coding method based on vibration and touch, including the following steps:

Graphically process the external information to be transmitted, and generate a graphic instruction, the graphic instruction includes four points and two line segments with directional arrows connecting the two points;

Encoding the graphics instructions to generate at least one group of vibration stimulation instructions combined with space and time; wherein, the encoding the graphics instructions includes: performing numerical ordering on a plurality of positions in the graphics instructions; using each line segment The end without the arrow is the starting point, and the end with the arrow is the end point. The numerical order of each position is read in order from the starting point to the end point; the numerical order of the two line segments is from small to large according to the numerical order of the respective starting points. perform sorted reads;

Corresponding information, graphic instructions and vibration stimulation instructions one-to-one, and jointly construct a vibration-tactile alphabet coding table as shown in Figure 3.

Specifically, taking "Z" as an example, the circle represents the annular collar, and the numerals 1, 2, 3, and 4 respectively represent the four vibration motors, and the positions on the annular collar correspond to each other. The thick arrow indicates that the first pair of vibration stimuli points from 2 to 4, that is, the motor 2 is first vibrated for a period of time, and then the motor 4 is vibrated. 4. Vibrate for a period of time, then vibrate motor 3 and then vibrate; the generated vibration stimulus command is represented as 2443. That is, the letter "Z" is encoded as the vibration-tactile stimulation paradigm "2443" which combines space and time. Through the selection of different vibration motor positions to achieve space, the vibration time and interval time of different motors can be combined to achieve time selection.

When the above-mentioned vibration tactile stimulation device learns "2443", it sequentially controls the vibration motor 2, the vibration motor 4, the vibration motor 4, and the vibration motor 3 to work according to this coding rule to generate vibration stimulation.

Claims (9)

1. The space-time combination coding method based on vibrotactile is characterized by comprising the following steps:

performing graphical processing on external information to be transmitted to generate a graphical instruction, wherein the graphical instruction comprises a plurality of sites and M line segments which are connected with any two sites and provided with directional arrows, and M is a natural number;

coding the graphic command to generate at least one group of vibration stimulation commands combined with space and time;

and the information, the graphic commands and the vibration stimulation commands are in one-to-one correspondence, and a vibration touch letter coding table is constructed together.

2. A vibrotactile-based space-time coding method according to claim 1, wherein said coding of graphical instructions comprises:

performing digital marking on a plurality of sites in the graphic instruction;

taking an arrow end not in each line segment as a starting point and an arrow end as an end point, and sequentially reading the numerical mark sequence of each site according to the sequence from the starting point to the end point;

and sequencing and reading the M line segments according to the numerical sequence of the respective starting points from small to large.

3. A vibrotactile-based space-time coding method according to claim 1, wherein the vibrotactile stimulation instructions comprise:

the vibration motors at two sites are used as a pair of vibration stimulation groups, and the two vibration motors independently generate a pair of vibration stimulation at intervals;

two pairs of vibration stimulation groups which generate vibration stimulation at opposite intervals form a group of vibration stimulation instructions, namely a vibration touch stimulation paradigm combining space and time is generated.

4. A vibrotactile-based space-time coding method according to claim 3, wherein one set of vibrotactile commands comprises four vibrotactile stimuli generated by a single vibrotactile motor, the first vibrotactile stimulus is a starting point and the second vibrotactile stimulus is an ending point in a first pair of vibrotactile stimuli, and the first vibrotactile stimulus is a starting point and the second vibrotactile stimulus is an ending point in a second pair of vibrotactile stimuli, and the second vibrotactile stimulus is a ending point; the four vibration stimuli are started in sequence, and time coding is carried out, namely a vibration touch stimulus paradigm combining space and time is generated.

5. A vibration touch stimulation device is characterized by comprising annular wearing equipment, a plurality of placing bags, N vibration motors and a control energy supply module, wherein the annular wearing equipment can be attached to a three-dimensional sensing part of a human body; the plurality of placing bags are distributed on the annular wearable equipment at intervals; n vibration motors are respectively placed in a placing bag, N is a nonzero even number, the number of the vibration motors is selected according to needs, the vibration motors are used for providing vibration stimulation elements, and each vibration motor is provided with an independent pin and is respectively connected with a control energy supply module; and the energy supply module is controlled to supply energy to each vibration motor and modulate the vibration intensity of the vibration motor.

6. The vibrotactile stimulation apparatus according to claim 5, wherein the annular wearable device is a collar, or a bracelet, or a belt of flexible material.

7. The vibrotactile stimulation apparatus of claim 5, wherein the vibrotactile motor is a coin motor.

8. The vibrotactile stimulation apparatus of claim 5, wherein the control and energizing module is capable of generating a pulse width modulated drive signal, and the pulse width modulated drive signal modulates the intensity of the vibrotactile motor vibrations via a dedicated amplifier circuit.

9. Vibrotactile stimulation apparatus according to claim 5, characterized in that said control and energy supply module controls the operation of the N vibrotactile motors according to vibrotactile stimulation commands obtained by the coding method according to any one of claims 1 to 4.

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