RU197549U1 - HUMAN HAND MOVEMENT DYNAMIC CORRECTION - Google Patents

Abstract

The utility model relates to medical equipment, namely to means of teaching a person motor skills under the influence of external factors. The device comprises a housing in which the unit for setting the target and the trajectory of movement to it, the control unit for the trajectory of movement of the hand, the block for impaired hand movement, the communication unit and the control unit are located. The case is equipped with an electromagnet, a gyroscope, an eccentric drive connected to a block of impaired hand movement. The case is fixed on the human hand. The unit for setting the target and the motion path through the communication unit is connected to the control unit and has the ability to visualize the target and the desired motion path. The block of impaired hand movement through the communication unit is connected to the control unit and has the ability to interfere with the movement of the hand by mechanical action on the device. The control unit of the trajectory of movement through the communication unit interacts with the control unit in order to compare the path of movement of the hand with a given path to achieve the goal. Achieving increased reliability of accurate and rapid movement of a person’s hand in the presence of factors opposing its implementation, provides a simulator for training. 3 s.p. f-ly, 2 ill.

Description

The utility model relates to means of teaching a person motor skills under the influence of external factors.

A device in the form of a sensory glove used as a manipulator is known [1]. According to the known invention, a person performing active flexion-extension of the hand and fingers, ensures compliance with the specified movements of the visual object displayed on the computer screen. This causes the triggering of sensitive elements and their computer registration. Due to objective computer analysis of sensorimotor processes, it is possible to rehabilitate the motor function of the patient’s hand with damage to the central nervous system with the participation of the patient in the rehabilitation process.

The disadvantages of this technical solution include the lack of the ability to take into account external factors that create violations of the sensorimotor field.

The closest device in technical essence is the training system according to patent US2003077556, testing the physiological and kinesthetic systems of the subject for synergistic improvement of cognitive function [2]. The interactive system includes a tracking system for determining location changes, a display of prompts for interactive movement and encourages the athlete to participate in cognitive training.

The system contains a unit for tracking the position of the body or the trajectory of its movement based on optical sensors that transmit data through the communication unit to the control unit (computer). The control unit is equipped with a memory element and is used to compare the trajectory of the simulated movement with a given trajectory of movement. The computer processes the information and transmits the video signal to the video display. The device includes a printer for printing test and training output. The computer may be connected to the data input device through a wired or wireless connection. In addition, the system contains a block against movement, for example, stretchable elastic harnesses that create resistance opposite to movement, which accelerates the learning process due to well-known principles of sports training.

The disadvantage of the system is the inability to introduce random, independent of the subject’s behavior, interference into the movement, which does not allow to realize the process of cognitive adaptation to accurate and fast movement under the influence of external factors.

In real life conditions, a person is constantly faced with the fact that his motor activity depends on vibrations, shocks, a forced change in body position, a change in the weight of body parts caused, for example, by acceleration. Especially often faced with such phenomena are people employed in professions associated with increased risk - drivers, firefighters, pilots, divers, astronauts. Willingness to counteract an external factor in the implementation of motor activity in this case becomes a professionally important quality.

The problem to which the invention is directed is to create a technical system that provides the ability to form the ability to counteract random external factors that violate the accuracy and speed of the movements of the human hand.

The technical result consists in increasing the reliability of accurate and fast movement of a person’s hand in the presence of factors that impede its implementation.

The specified technical result is achieved by using a device for dynamic correction of the movement of a person’s hand, containing a housing mounted on the person’s hand, in which a unit for setting a target and a trajectory of movement to it with a set of test data, a block for controlling the trajectory of a hand, a block of impaired hand movement, a communication unit are placed and control unit. The mentioned unit for setting the target and the motion path through the communication unit is connected to the control unit and has the ability to visualize the target and the desired motion path to this target on a flat screen-type surface. The mentioned block of impaired movement of the arm is connected to the control unit and may interfere with the movement of the arm by mechanical action of the device on the arm, while the casing is equipped with an electromagnet, gyroscope, eccentric drive connected to the block of impaired arm movement. The said motion path control unit interacts with the control unit and compares the motion path of the hand with a predetermined motion path.

Like the prototype device, the claimed device can store a set of specified visual trajectories and compare them with the performed movement of the hand of the subject. The arsenal of tools for creating visual images in space or on a plane is well known: optical transfer to the plane of the points of a three-dimensional object, visualization of the ray path on the oscilloscope screen, construction of holographic images, virtual 3D-visualization of images using special glasses or helmets [3].

In the particular case of the implementation of the claimed device, the procedure for visualizing the target and a given trajectory of movement can be carried out on a monitor screen or computer display.

In addition, the control unit can generate a command to visualize a given trajectory according to a given algorithm, i.e. demonstrate one of the test tasks, for example, issue a command to visualize a straight line, then a complex wavy curve, then a set of numbers randomly located on the plane.

The small-sized (based on several microcircuits) device can be mounted on the hand with a bracelet or suction cup.

The invention is illustrated by drawings.

In FIG. 1 shows a block diagram of a device, where 1 is a block for setting a target and a motion path; 2 - control unit of the trajectory of movement; 3 - block movement disorders; 4 - communication unit; 5 - control unit.

FIG. 2 illustrates an example of a specific embodiment of a device;

The numbers indicate:

1 - target setting unit defining a specific test path from a set of test data (curved line);

2 - touch unit for monitoring the path of the hand;

3 - block movement of the arm;

4 - communication unit between the blocks;

5 - control unit;

6 - goal;

7 - case;

8 - a device for mounting the housing on the hand of a person.

The claimed device for the dynamic correction of the movement of a person’s hand (Fig. 2) is a body 7 that is mounted on a person’s hand, for example, using a suction cup or a bracelet 8. The case comprises a unit for setting a target and a movement path to it 1, a control unit for the movement of the hand 2 , block of impaired movement of the hand 3. The mentioned block for setting the target and the trajectory of movement 1 has the ability to visualize the target and set the trajectory of movement to it, for example, points t1, t2 ... tn glowing on the monitor screen. Functional blocks 1, 2, 3 through the communication unit 4 are electrically interacting with the control unit 5, made, for example, based on a memory chip. The device has an independent power supply element (not shown in the figure). The mentioned block of movement disruption 3 has the ability to introduce random interference with the movement of the hand by mechanical action on the hand through the housing 7. The source of such effects may be vibration, shock of the core of the electromagnet, gyroscopic forces and other influences that prevent the accurate and fast movement of the hand along a predetermined path.

The device operates as follows (figure 2):

The body of the device is fixed on the hand of a person. After activation, the device visualizes the trajectory required for repetition. For this, the unit for setting the target and the trajectory of movement 2 gives an image of the target 6 and a sample of the trajectory of movement towards it, along which the person moves the index finger or the held tool. In this case, the control unit 5 turns to the unit for setting the target and the trajectory of movement 1 and visualizes one of the test motion trajectories contained in it, which the subject must repeat with the hand as accurately as possible. The control unit 5 according to a predetermined program activates a block of movement disturbance 3, located in the housing 7, which prevents the accurate and fast movement of the hand along a predetermined path through mechanical action on the hand.

Hand movement is hindered by an inertial device in the form of an eccentric located on the shaft of an electric motor, an electromagnet that changes the position of a magnetic core of sufficient mass, and a gyroscope that prevents its axis from turning.

The movement of the hand along a predetermined path and the accuracy of the path when the goal is reached is estimated by the control unit 5 based on the data of the motion path control unit 2. The motion path control unit identifies the position of the fingertip or held tool (e.g., pointer) during movement. The trajectory control unit is equipped with a position sensor (optical, electromagnetic, mechanical, capacitive). The simplest option is a distance sensor. Digital data is sent to the control unit.

A given trajectory of movement can be a model of a real movement or serving an action performed in everyday life, sports, games or work activities. The trajectory can be defined as a visual pattern, for example, as a set of points, one of which is the target. In special cases, this can be a curved line enveloping several points, a set of increasing numbers that the subject must point to sequentially, etc. The task and the trajectory of movement to it are set by the command of the control unit, in accordance with which the block of the task of the trajectory of the hand movement implements the task from the set of test data. With repeated use, the device acts as a simulator.

The control unit implements the logic in accordance with which each point of the trajectory is associated with the probability of the start of the block of movement disturbance. The simplest cases are as follows: a block of motion disruption is triggered when a neighborhood of a point of a trajectory with a given radius, for example, with a radius of several millimeters, is reached. To satisfy this condition, it is sufficient to use the proximity sensor, which gives a signal to the control unit, which triggers the jamming mechanism. An additional condition for the triggering of a block of movement violation can be indicators of speed and accuracy of movement. In this case, the probability of triggering the block of movement disturbance will be determined by the adaptive process and depend on the speed and accuracy of the movement in the mode close to real time.

The communication unit 4 provides the transfer of information between the control unit and the remaining units and can be implemented in both wired and wireless versions.

The housing 7 is designed to design the device in a single design and to accommodate the above blocks. A block of movement disorders with an inertial device is placed in such a way that its effect when introducing interference to hand movement is most effective.

Mounting the housing 8 on the arm, in addition, provides the spatial position of the sensors of the motion path control unit, the readings of which are necessary to track the movement corrections and the degree of cognitive adaptation of the test subject to external influences.

The surface with a given path can be implemented in the form of a plane with the lines shown on it, or a set of points, each of which is identified by a digital or alphanumeric code (Figure 2). A sequence of signs and curves with given characteristics of position in space is also possible.

The accuracy of the repetition of the trajectory is estimated by the control unit 5 based on the data of the control unit of the trajectory of movement 2, which at each moment of time compares the trajectory of the human hand with a given trajectory, interpreting the difference as an indicator of the accuracy of the movement. In accordance with a predetermined algorithm, when a certain accuracy indicator is reached at a random or predetermined point in the motion path, a control signal is transmitted to the motion disturbance block (4), which changes the kinestatic balance of the pointing arm. To restore the accuracy of the movement, it is necessary to apply additional force and carry out a correction. The accuracy of the movement and the magnitude of the necessary corrections are evaluated by the control unit for the trajectory of movement of the arm 2, associated with the control unit.

A decrease in the number of necessary corrections in a repetitive motor act is interpreted as cognitive adaptation, a learning effect that increases the reliability of the precise movement of a person’s hand in the presence of factors that oppose its implementation. The technical result is to increase the reliability of accurate and rapid movement of a person’s hand in the presence of external factors that impede its implementation.

Sources of information taken into account:

1. Patent RU 2494670, IPC A61B 5/00, A61B 5/04, A61B 5/11, G09B 9/00, G09B 19/00. A method for correcting fine motor skills using sensory gloves. Publ. 06/20/2013, bull. Number 17.

2 Patent US2003077556, Education system challenging a subject's physiologic and kinesthetic systems to synergistically enhance cognitive function, 04.24.2003 (prototype).

3. Belova Z.S. Presentation of scientific information by visual aids. Cheboksary: Publishing house of the Chuvash University, 1997. - 58 p.

Claims (4)

1. A device for dynamically correcting the movement of a person’s hand, comprising a housing mounted on a person’s hand, in which a unit for setting a target and a trajectory of movement to it with a set of test data, a control unit for the trajectory of movement of the hand, a control unit and a communication unit between the blocks are located, the unit for setting the target and the trajectory of movement to it through the communication unit is connected to the control unit and has the ability to send a command to visualize the target and the specified trajectory of movement to it on a flat surface, characterized in that the device’s body is equipped with a block of impaired hand movement, which is connected through the communication unit to the control unit and has the ability to introduce random interference with the movement of the hand by mechanical action on the body, and the said block of control of the path of the hand through the communication unit is connected to the control unit and has the ability to compare the path of the hand with a given path to achieve the goal, while the body is equipped with an electromagnet, gyro in an osprey, an eccentric drive, connected to a block of impaired hand movement. 2. The device according to claim 1, wherein said unit for setting a target and a predetermined motion path to it visualizes a target and a motion path to it on a video monitor screen. 3. The device according to claim 1, in which said control unit gives a command to visualize the target and the trajectory of movement to it according to a predetermined algorithm for accessing the set of test data. 4. The device according to claim 1, in which said block for monitoring the path of the hand is made on the basis of distance sensors.

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