EA011542B1 - Method for determining human's (sportsman) moving activity and device therefor - Google Patents

Abstract

A method foe determining human's moving activity, more particular to a certain body part (hand) characterized in that an electromechanical device is arranged on a human's hand, the device reacts on the movement which serves as a storage battery recharging unit, wherein the recharging current being a unit of human's moving activity is digitized and computed a value based thereon equavalent to the moving activity stored in RAM, the data of which can be read via a high-speed interface to an outer PC, e.g. for storing in the database.

Description

The invention relates to the field of sports medicine and relates to a method for determining the physical activity of a person (athlete), or rather its separate part (hand or foot), and a device for its implementation.

There is a method of recording the movement of a person, which consists in carrying out high-speed photography, entering images into a computer and its subsequent processing in order to calculate the parameters of movement, including motor activity. This method has several disadvantages: low accuracy of determination of parameters due to different angles of the position of the subject in time; the lengthy process of making calculations associated with the need to enter a large number of image frames in a computer and its analysis; assumes certain conditions of illumination of a person during filming; involves the presence of a person within the line of sight of the camera (s); has a high cost.

There is another method of registering movements of a person or its individual parts, which consists in placing elements sensitive to a change in their position in space at significant points of the human body, using known means to record and process the received information using a computer to obtain data on the nature of movements. person In the known method, a number of passive reflecting elements are used - tags that illuminate and carry out high-speed shooting with the help of 3 or more television cameras connected with high-speed analog input channels from a specialized computer.

This method also has a number of disadvantages, since it requires a person to be within sight, requires a person to be irradiated with various kinds of electromagnetic radiation (illumination) and requires additional equipment to illuminate the tags, a device for implementing this method is characterized by high cost.

A number of similar methods are also known, based on measuring distances to marks on certain parts of the human body by measuring other physical quantities based on the use of Hall sensors, electromagnetic, electrostatic and other sensors. All these methods and devices that implement them have common drawbacks: the need for a person to be exposed to electromagnetic or electrostatic fields; limited scope due to the finite sensitivity of the sensors; lower than optical methods accuracy, high cost.

The closest to the essence of the invention are the method and device VI 2257846 C1 "Method of registration of human movements and device for its implementation."

The described method consists in placing elements sensitive to changes in their position in space at significant points of the human body, using information sensitive to the signals of these elements, processing information received from them and processing the recorded information using a computer to obtain data on the nature of human movements. According to the invention, a three-coordinate device for measuring angular deviations is placed on a human body (for example, on a hand), including three angular velocity sensors, each of which is entiruyut towards one of three mutually perpendicular axes (X, Υ, Ζ) and record the signals output from these sensors in the non-volatile memory from which information is then used for subsequent processing. Note that in the description of the device implemented by this method, it is indicated that it is autonomous, i.e. not associated with other devices, including an external computer, power supplies, etc. In other words, such an autonomous device has batteries - electrochemical batteries or accumulators from which the device is powered.

The objectives of the present invention are to create a simpler method of registering the physical activity of a person (athlete), or rather its separate part (hand), which would not require the traditional use of traditional sensors measuring linear or angular velocities (semiconductor gyroscopes or accelerometers) for its implementation;

would not require external exposure (illumination) of the subject;

would not require the subject to bind to a specific limited area - the range of the sensors;

would not require a specific orientation of a person relative to the means receiving sensor signals;

would have a lower cost due to the absence of semiconductor displacement sensors; would have a simpler device structure (reduced hardware costs);

would provide longer operation of the measuring device by recharging the battery during operation.

The task is achieved by the fact that in the method and device for determining the motor activity of a person at a significant point (for example, on the arm) instead of a three-coordinate device for measuring angular deviations, including three semiconductor angular velocity sensors (gyroscope), each of which is oriented in one of three directions. mutually perpendicular axes (X, Υ, Ζ), place an electromechanical device that reacts to the movement of a person’s hand, similar, for example, to a wristwatch recharging mechanism, which is does not play the role of the mechanism of charging pi

- 1 011542 thawing battery (battery), and the battery charge current is a measure of human movement. The charge current is digitized using an analog-to-digital converter and processed directly in the measuring device, the same data can be read into an external computer to save the results (for example, in the database of athletes).

Let us consider several options for the implementation of electromechanical devices that react to the movement of a person’s hand, similar to the mechanism for recharging a wristwatch.

One of the options for the implementation of an electromechanical recharging device is that it contains a disk segment mounted on a freely rotating axis located in the center of the circle of the disk segment. When a person moves, this disk segment can rotate freely due to gravity and inertia. The axis of the segment is connected to the clock spring, which can freely compress when the segment rotates in the corresponding direction, but cannot unwind, since this is prevented by a mechanical latch. This spring unwinds relatively slowly through several gears and sets in motion a special wheel with an electric winding that rotates in a magnetic field created by a system of permanent magnets. A wheel with a winding and a system of permanent magnets form the simplest electric generator, since This wheel plays the role of a rotor. Thus, when a person is walking, if a disk segment rotates in the direction coinciding with the direction of the spring plant, it is compressed. A compressed spring spins the rotor of a miniature electric generator (through a system of gear wheels) that generates an alternating voltage of a certain magnitude.

The second variant also has a disk segment fixed on a freely rotating axis located in the center of the disk circumference. When a person moves, this disk segment can rotate freely due to gravity and inertia. The axis of the segment is simultaneously the rotor of a miniature electric generator. When a person’s arm moves and, accordingly, when a disc segment is rotated, a miniature electric generator produces an alternating voltage of a certain size.

The voltage from the output of the winding of a miniature electric generator passes through a rectifying diode bridge and is fed to a capacitor, on which the voltage is integrated, and then, through a fixed resistor, to the supply battery. Thus, the electromechanical device recharges the battery during operation, and the charge current flowing through the fixed resistor is equivalent to the motor activity of the human hand.

Obviously, such a device costs significantly less than, for example, a three-coordinate device for measuring angular deviations, which includes three semiconductor angular velocity sensors (gyroscope). For example, one Angular Velocity Speed Sensor of the Ap1od Osu1CC5 AOHYA8150EV company costs $ 50 | 1Shr: // \\ l \ l \ '. A1od.sot |. Those. a system of three sensors - respectively, more than $ 150. In addition, as mentioned above, the constant recharge of the battery, which is powered by a stand-alone device, increases its continuous operation time.

Thus, it is obvious how to simplify the device, and reduce its cost and increase the time of continuous operation. In addition, the proposed method and device provide a fairly high measurement accuracy; do not require harsh lighting or human exposure to any fields; do not limit the area of a person's location; provide higher speed data recording than high-speed photography; allow you to record the movement of a person (or its parts) for a considerable time and at a considerable distance.

The invention is further explained in the description of a specific variant of its implementation and in the accompanying drawing, which shows a functional diagram of a device for determining the human motor activity according to the invention.

The drawing shows a functional diagram of a device for determining a person’s motor activity, or rather, a separate part of it (arms, legs) containing an electromechanical charging device 1 with charging circuits (a diode bridge, an integrating capacitor and a resistor) and a battery, analog multiplexer 2, analog-digital converter 3, microcontroller 4, memory block 5 and high-speed interface I8B 6.

The windings of the electro generator of the electromechanical charging device are connected to the corresponding inputs of the semiconductor rectifier bridge UE. the outputs of which are connected to the outputs of the integrating capacitor C, and through a fixed resistor I with the corresponding battery outputs, the signals from both outputs of the constant resistor I are connected to the inputs of the analog multiplexer 2, the output of which is connected to the input of the analog-digital converter 3, the output of which is connected to the corresponding the inputs of the microcontroller 4, one group of outputs of which is connected to the control inputs of the analog multiplexer 2, the second group of inputs / outputs of the microcontroller 4 is connected with the inputs / outputs of the RAM block 5, and the third group of inputs / outputs of the microcontroller 4 is connected to the inputs / outputs of the high-speed interface I8B 6, the output of which can be connected to an external computer.

The method of registration of human movements will become clear from the description of the operation of the device.

The device works as follows. When a person's hand moves with a device attached to it for determining the motor activity of an electromechanical recharging device 1

- 2 011542 produces some alternating voltage, which is rectified on the diode rectifier bridge UE, integrates on the capacitor C and through a constant resistor K. enters the battery, recharging it (it is used to power the autonomous device). Both outputs of the constant resistor K are connected to the inputs of the analog multiplexer 2. Signals from the outputs of the resistor K, formed by the charge current of the battery and equivalent motor activity, are fed to the input of the analog-digital converter 3 through the analog multiplexer 2, which is controlled by the microcontroller 4. The signals are digitized into analog -digital converter 3 and from its output are fed to the inputs of the microcontroller 4, in which the calculation of the motor activity and the accumulation of the obtained value in the block RAM 5. Other inputs / outputs of the microcontroller 4 are connected to the inputs / outputs of the high-speed interface I8B 6, the output of which can be connected to an external computer for quick reading of accumulated data. The nodes of the analog multiplexer 2, analog-digital converter 3, microcontroller 4, memory block 5, interface I8B 6 are the internal nodes of the modern microcircuit of the C8051E342 microcontroller manufactured by 8thWayBoog1ope5.

The advantages of the proposed method and device are that they reduce hardware costs compared with the prototype; reduce the cost of the device compared to the prototype; do not use any semiconductor sensors that react to movement; provide longer operation of the autonomous measuring device from the battery due to its recharging during operation;

there is no need for human exposure to external electrostatic, electromagnetic or other fields that are harmful to health;

the person being tested is completely free of territorial restrictions (neither by fasteners, nor by the equipment used, nor by the zone of visibility or radio reception);

the test person is free from a certain orientation in space, for example, so that the sensors are illuminated or rotated towards the receiving antenna or the photodetector;

The registration rate for this method and device is significantly higher than in opposing devices, since it is not limited by the need for manual measurements, throughput of communication channels, etc.

The devices used in the claimed method are autonomous, i.e. they do not have communication with the computer or with external power during measurements and recording, therefore they have no wires or other elements that interfere with the natural movement of the test person.

Claims (4)

CLAIM 1. A method for determining the motor activity of a person, consisting in the fact that at sensitive points in the human body are placed elements that are sensitive to changes in their position in space, using the means sensitive to the signals of these elements, they record information received from them and process the recorded information to obtain data on motor activity, characterized in that a single autonomous microcontroller device is placed on the human body, including an electromechanical device that responds to movement, which e acts as a mechanism for recharging the battery, and the recharging current, which is a measure of a person’s motor activity, digitizes and calculates on its basis a value equivalent to motor activity, which is accumulated in RAM, data from which can be read through a high-speed interface to an external computer, for example , to save to the database. 2. A device for determining the motor activity of a person, comprising means for determining movement, an analog multiplexer, an analog-to-digital converter, a microcontroller, a high-speed I8V interface, characterized in that the means for determining movement is made in the form of an electromechanical device that responds to the movement of a person’s hand, similar, for example , the mechanism of recharging watches, which charges the battery, and the recharging current, which is a measure of the motor actively human capacitance, it is measured on a resistor whose outputs are connected to the inputs of an analog multiplexer, the output of which is connected to the input of an analog-to-digital converter, the output of which is connected to the inputs of the microcontroller, the outputs of which are connected to the inputs of the analog multiplexer, RAM, and the high-speed I8V interface. 3. The device according to claim 2, in which the electromechanical charging device comprises a disk segment mounted on a freely rotating axis located in the center of the circle of the disk segment, the axis of the segment is connected to a clock spring, which can freely compress when the segment rotates in the corresponding direction, but can spin only through a few gears that drive the rotor of a miniature electric generator, rotating in a magnetic field of permanent magnets, which produces during its rotation AC voltage of a certain value. - 3 011542 4. The device according to claim 2, in which the electromechanical recharging device comprises a disk segment mounted on a freely rotating axis located in the center of the circle of the disk segment, which is also the rotor of a miniature electric generator that generates an alternating voltage of a certain magnitude when moving.