RU2472173C2 - Radio measuring system for digital recording of parameters of movement of athletes - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: movements of athletes in coordinates of the playing field are determined using radio signal sources mounted on the athletes and receivers of these signals which are fixed near the playing field. Results of calculation at each given time interval using high-speed computing devices are used to record in digital form coordinates of movements of athletes during the game and resultant displacement and the path of movement of an athlete are determined. The invention enables to evaluate the efficiency of movement of each athlete in a team and evaluate their influence on the outcome of the game.

EFFECT: enabling simultaneous digital recording of parameters of movements of athletes during a game and faster recording.

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Description

The invention relates to measuring radio systems for determining the location of any objects.

In the measuring radio complex uses the method of triangulation measurements of the position of any objects on the ground.

The complex is designed for digital recording of athletes moving parameters in the process of sports action. It can be used in sports such as football, hockey, figure skating, skiing, athletics and walking.

Registration of the parameters of the movement of athletes in the process of sports action is important for assessing the effectiveness of each of them, their contribution to the final result and assessing the quality of sports action in general.

According to the registration results, statistical data processing can be performed using mathematical statistics methods.

The novelty of the invention lies in the fact that the complex is multi-channel and provides simultaneous digital registration of the parameters of the athletes' movement, namely, the path, speed and acceleration in individual sections of the terrain during the entire continuous sports action.

At present, the change in the location of athletes and their movement is determined either by visual direct observation or by television means. These tools do not allow continuous determination and simultaneous registration of the parameters of the movement of several athletes in separate sections of the playing field or track along which the athletes move.

Existing satellite navigation systems cannot be applied due to their significant inertia and the inability to simultaneously digitally record the parameters of the movement of athletes in the game.

This measuring complex simultaneously digitally records the parameters of the movement of athletes according to the results of a triangulation measurement of the coordinates of the location of each athlete participating in the sports action, calculates their change in individual sections of the movement in the accepted time intervals.

The measuring complex includes:

- a tracking radio system that provides tracking of the movement of athletes;

- computing devices;

- recording devices that record movement parameters on any information carriers

In the process of operation, narrowly directed antennas, the number of which should be equal to the number of athletes, at the selected time intervals simultaneously receive radio signals from radio signal sources located on moving athletes. Radio frequencies must be spaced apart.

The maximum value of the received radio signal measures two angles between the directions to the source of the radio signal and the base on which the antennas with receivers are installed.

At these two angles, the computing devices calculate the coordinates of the athlete's location and their change over the accepted time interval during the movement. Moreover, the shorter the accepted time interval, the greater the speed of the computer, the more accurately the trajectories of the athletes will be determined.

For example, playing football or hockey, the playing field is presented in a flat coordinate system.

,

и игрового поля х, у.The measurement scheme is shown in the drawing. On it, the playing field is limited by lines between points 1, 2, 3, 4 and is presented in two coordinate systems - the main

,

and playing field x, y.

The origin of the playing field is taken at point 0, located in its center.

, которая находится на пересечении базисной линии В и диагонали, проходящей через точки 1, 3 и 0.The origin of the main system is taken at a point

, which is located at the intersection of the baseline B and the diagonal passing through points 1, 3 and 0.

и N располагают стационарные устройства с приемниками радиосигналов. На каждого спортсмена приходится по два приемника, каждый из которых настроен на свою частоту, соответствующую частоте источника радиосигнала.At points

and N have stationary devices with radio receivers. For each athlete there are two receivers, each of which is tuned to its own frequency, corresponding to the frequency of the radio signal source.

Point N is found at the intersection of the diagonal passing through points 2, 4 and the center of the field, and the baseline B.

The distance d ₁ from the origin of the main system to point A ₁ at which the athlete is currently located is determined by the well-known formula:

The distance d ₂ from the origin of the main system to point A ₂ , to which the athlete has moved for the interval instead of Δt, is determined by the formula:

и N и базовой линией В.In these formulas, α ₁ , α ₂ , β ₁ , β ₂ are the angles between the directions to the athlete located at points A ₁ and A ₂ from the points

and N and baseline B.

,

,

,

в основной системе координат, а затем координаты спортсмена x₁, x₂, y₁, y₂ в системе координат игрового поля.These formulas first determine the coordinates

,

,

,

in the main coordinate system, and then the coordinates of the athlete x ₁ , x ₂ , y ₁ , y ₂ in the coordinate system of the playing field.

The movement ΔS of the athlete from point A ₁ to point A ₂ for the time interval Δt is determined by the formula:

,

here

,

,

,

,

Respectively

,

,

,

The average athlete's speed in this interval is determined by the formula

The total movement for a certain time interval T is determined by the formula:

The procedure of the operator consists in the initial setup of the receivers of radio signals from each of the athletes. Further, tracking the movement of athletes and recording the results are automatic.

An embodiment of radio equipment is possible when the signal receiver and, therefore, the baseline B will not be located in the plane of the playing field, but at a certain height N. In this case, the trigonometric measurement scheme becomes three-dimensional, and the movements of athletes on the playing field are calculated in a three-dimensional coordinate system .

The effect of the use of the measuring complex is to improve the quality of the athletes ’performances, to increase their sports achievements, due to the ability to register movement parameters in digital form and the ability to quantify performance parameters throughout the entire sports action. Due to the possibilities of using methods of mathematical statistics, a better assessment of the interaction of athletes in game sports is achieved in the post-match analysis of the game.

Ultimately, this can be expressed in improving athletic performance and winning prizes in many sports.

Claims (1)

A radio-technical measuring complex for digital recording of athletes moving parameters is multichannel, characterized in that it includes radio signal sources that are located on each moving athlete during the game, radio signals receivers that are placed stationary in the corresponding points of the playing field to track the movement of athletes by receiving radio signals tuned to frequencies corresponding to the frequency of radio sources of athletes, device for calculating A set for receiving data from these receivers and determining angles between the directions of movement of athletes from one point to another point on the playing field for selected time intervals, as well as simultaneously calculating the parameters of movement of each athlete on the playing field during a sports action and a digital recording device of the received parameters .