SU1650172A1 - Device for measuring sportsman motion parameters - Google Patents

Abstract

The invention makes it possible to increase the range of the device. The contact device 4 starts via the first radio transmitter 3 and the radio receiver 5 ultrasonic transmitter 1. The ultrasonic receiver 2 via the second radio transmitter 9 and the radio receiver 10, connected via loop antenna 6, transmits a signal to the time measurement unit 7, where it is detected and output to the indicator 8 the length of the running step. 1 pf-ly, 1 ill.

Description

The invention relates to devices and systems for monitoring and controlling the training process in sports and can be used to measure the parameters of the athlete's movement, namely the length of 5 running steps and the durations of the supporting and flight phases of running movement.

The purpose of the invention is the increase in the range of the device.

The drawing shows a block diagram 10 of the device.

The device contains ultrasound. transmitter 1 and receiver 2, the first radio transmitter 3 mounted on the athlete with the contact device 4, the first radio receiver 15 nick 5 connected to the loop antenna 6. The output of the first radio receiver 5 is connected to the first input of the time interval measuring unit 7, the output of which is connected to the input of the unit 8 indications. The device 20 also contains a second radio transmitter 9 and a radio receiver 10, the output of the ultrasonic receiver 2 being connected to the input of the second radio transmitter 9. The input of the second radio receiver 10 is connected to the loop antenna 6. The output of the first radio receiver 5 is connected to the ultrasonic transmitter 1, and the output of the second the radio 10 is connected to the second input of the unit 7 measuring time intervals. thirty

The first 5 and second 10 receivers differ only in tuning frequencies and are performed according to the simplest direct gain circuit, which contains a series-connected input filter of concentrated selection, a radio frequency amplifier, a detector, and a low-pass filter.

The first 3 and second 9 transmitters are transistor generators assembled according to the scheme of capacitive 40 three-point and working on a belt-shaped transmitting antenna.

The measurement unit 7 and the indication unit 8 can be performed both hardware and software using 45 microcomputers, for example, a serial microcomputer Electronics NMS 11100.1. Software implementation is preferable, since it is convenient to use a display or 50 printing device, which is part of the serial complex based on this microcomputer, as an indication unit 8.

The device operates as follows.

In the initial state, the contact device 4 is turned off and the first transmitter 3 does not work. At the moment of touching the foot of the support surface, the contact device 4 includes the first transmitter 3 and a signal is induced in the loopback receiving antenna 6, which is amplified by the first receiver 5 and fed to the measuring unit 7 and an ultrasonic transmitter that starts to emit ultrasonic vibrations into the air. In the measurement circuit, the signal from the output of the first receiver 5 starts the unit 7 for measuring time intervals.

Ultrasonic vibrations emitted by the ultrasonic transmitter 1 are received by the ultrasonic receiver 2 attached to the athlete with a delay due to the distance from the athlete to the ultrasonic transmitter 1 and the propagation velocity of the ultrasonic vibrations. The signal from the output of the ultrasound receiver is relayed by the second transmitter 9 and through the receiving antenna 6 is transmitted to the input of the second receiver 10. The tuning frequencies of the first 5 and second 10 receivers and the corresponding first and second 9 transmitters are different enough to ensure the reception of signals in these receivers without mutual interference .

The signal from the output of the second receiver 10 is fed to the second input of the time interval measuring unit 7 and stops the time counting in it. The measurement result from the output of the block 7 measuring time intervals enters block 8 of the display. When the foot is removed from the surface, the contact device 4 turns off the first transmitter 3. When the signal at the output of the first receiver 5 disappears, the ultrasonic transmitter 1 turns off and the time interval measurement unit 7 stops, which captures the time of the reference phase and displays it on the display unit 8, after which the device is ready to the next measurement cycle.

The length of the running step can be calculated by the formula where Tm and T _P p - the delay time of the propagation of ultrasonic waves in the current and previous measurement cycles;

v ₃ b is the speed of sound in air.

Compared with the prototype device, the proposed device provides a significant increase in range, which can reach up to 100 m, covering the range of distances of sprinting and run sectors in long jumps, triple and in height with a pole.

Claims (1)

SUMMARY OF THE INVENTION A device for measuring the parameters of an athlete's movement, comprising an ultrasonic transmitter and a receiver, a first radio transmitter with a contact device for attaching to an athlete, a first radio receiver connected to a loop antenna by an input and an output of a time interval measuring unit, the output of which is connected to an indication unit , 10 characterized in that, in order to increase the range of the device, a second radio transmitter and a radio receiver are additionally introduced into the device, the output being ultrasound kovogo receiver 5 is connected to a second transmitter, the second radio input is connected to the loop antenna, the first radio output is further coupled with an ultrasonic transmitter, radio receiver and an output connected to the second input of the second unit of measurement of time intervals.