SU1741832A1 - Arrangement for training volleyball players - Google Patents

Abstract

SUMMARY OF THE INVENTION: By using a block of time intervals, a pulse of a given duration and pulse at a predetermined time interval, as well as the introduction of a differentiating chain that extracts the initial moment of signal generation by the sensor, the device can be used to simplify the pattern of control signals for catapults. 2 hp f-ly, 4 ill.

Description

The invention relates to sports equipment and is intended to train and evaluate the speed of a motor reaction in volleyball.

The closest in technical essence (basic) is a device for training volleyball players, which contains elements AND, NOT, a display unit connected to a time block and a time measurement unit, two sensors connected to a game action task block, which is connected through OR elements with catapults.

This device not only fixes the speed of the athlete's reaction, but also allows using different methods (dissected, sensory, re-response) to train the speed of the motor reaction in conditions close to real game actions when the athlete plays defense. However, the drawback of the device is the complexity of the electronic control circuit of the catapults.

The aim of the invention is to simplify the device.

This goal is achieved by the fact that the block of time intervals operates in the mode of forming a pulse of a predetermined duration and in the mode of forming a pulse at a specified interval of time, which greatly simplifies the scheme of controlling the catapults in the automatic mode.

Figure 1 presents the structural diagram of the proposed device; in fig. 2 is a block diagram of one of the variants of the block of time intervals; in fig. 3 - diagram of the operation of the block of time intervals; in fig. 4 is a diagram of the operation of the device.

The device contains an indication unit 1, first 2 and second 3 sensors unit 4 for measuring time parameters, unit 5 for setting game actions, unit 6 for time intervals, differentiating chain 7, first element AND 8, first element OR 9,

WITH

with

x |

00

from th

the catapult 10, the second element And 11, the second element OR 12 and the catapult 13.

The display unit 1 is designed to turn on the alarm device about the beginning of the game action by the athlete, as well as to indicate the device is ready for operation and about the variant of the selected mode of operation.

The first sensor 2 is designed to generate a signal about the end of the latent reaction time. It is made on the basis of normally closed contacts. The second sensor 3 is designed to generate a signal that the athlete has completed moving to a predetermined area of the playing field. It is made on the basis of normally open contacts. Sensors 2 and 3 are located on the playing field.

The unit 4 for measuring time parameters is intended for fixing the latent reaction time and time from the beginning of the signal to the athlete's action until he is ready for playing actions in a given area of the playing field. It is made on the basis of electronic stopwatches.

Block 5 task game action is designed to select the mode of operation of the device. It contains two three-position switches T1, T2, one dual two-position switch TZ and has five outputs.

The block of 6 time intervals (BVI) is intended for the formation of a pulse of a given duration and the formation of a pulse after a predetermined time interval. It consists of two differentiating chains (DC) 14 and 16 and two waiting multivibrators 15 and 17.

The catapult 10 is located above the grid, directed to the zone of sensor 2 or 3, depending on the setting of the game combination, and is intended to simulate an attack hit, i.e. for use by the athlete on the bottom. The catapult 13 is located above or behind the net and is designed to simulate a fraudulent strike (discount) or transfer the game for the game from above.

The device works as follows.

The athlete occupies the initial position on the platform, under which the first sensor 2 is located. The coach switches on the device (Start command). In this case, the indicator of the display unit 1 is activated and the stopwatches of the unit 4 for measuring time parameters are turned on. Turning on the alarm is for the athlete to take action. The athlete moves to the second sensor 3. At the same time, the first sensor 2 at the time of removal of the load

stops one of the stopwatches, which records the latent reaction time. When the athlete steps onto the pad of the second sensor 3, the second one stops

A stopwatch that captures the total time taken to complete the action.

When training the speed of the motor reaction followed by the game action, the trainer sets the different game situations by turning on the switches of the block 5 of the task of playing actions. For operation in manual mode, setting the switch T1 in the I or II position is connected to the device first or second

the sensor, and the installation of the switch T2 in the I or I position are connected to the catapult 10 or 13.

To work in automatic mode, you need to connect one of the sensors with switch T1, set switch T2 to position III, and select one of two modes of operation for BVI 6 with switch TZ: mode I of formation of a pulse of a given duration or mode II of formation of a pulse after a predetermined time interval.

Operation of BVI 6. The Start (fig. 3a) pulse from DC 14 triggers the first waiting multivibrator 15, at the first output of which a pulse of a predetermined duration is formed (3), the other output has a pulse of opposite polarity (Fig. 3) . At the end of the pulse Gz, the trigger pulse (Fig. 3g) arrives at

the input of the multivibrator 17, on one output of which a signal of duration t is formed (fig. Zd), and on its other output - a signal of anti-polarity polarity (fig.ze).

In the automatic mode, when a signal is received from one of the sensors in block 5 of the game action setting from the output of the DC 7, the signal simultaneously arrives at the first inputs of the And 8 and 11 elements. If at this moment, from the first output of the BVI 6, the second input of the And 8 element receives a signal then the catapult 10 is triggered. If there is no such signal, then to the second input of the And 11 element the signal comes from the third output of the BVI 6.

Then the catapult 13 is triggered.

The device is used as follows.

Training i f reaction speeds by the method of re-ir, ro First sensor 2

located in the zone from which the athlete begins to move on the signal signaling device. The second sensor 3 is located in the zone where the attacker from the catapult 10 will be struck. Switch T1 is in position I.

At the signal of the detector, the athlete moves with a maximum speed to the zone of the second sensor 3. Depending on the selected manual mode, i.e. installation of T2 in the I or II position, includes a catapult 10 or 13. In this case, the coach can tell in advance which catapults are turned on, or turn them on without informing the athlete.

The athlete is announced the time gz for which he must move to the zone of the second sensor 3. The device is switched to automatic mode of operation - to position III, TK - to position I). On a signal, the start-up BVI 6 generates a pulse of a predetermined duration gz (Fig. 4, mode I), and the athlete begins to move to the zone of sensor 3. If the time for performing the action Tp is less than or equal to the set one, i.e. 3 (la mode 4), the signal from sensor 3 in the form of a single pulse from DC 7 arrives at the first input of elements 8 and 11 at the time the signal from the BVI 6 arrives at the second input of element 8, at the output of which a signal is generated , including the catapult 10. If the execution time of the action is more than the specified, i.e. t p g c (fig. 4, mode 16), then the signal from sensor 3 through DC 7 enters the first input of elements 8 and 11 at the moment when there is no signal at the second input of element 8 and there is a signal at the second input of element 11 11. This triggers a catapult 13.

In both cases, a simple reaction training is combined with a selection reaction.

Training reaction speed sensory method.

The location of the sensors is the same. The training is carried out in three stages. At the first stage, the worker performs the movement, trying to respond to the signal with the maximum speed. It moves from the first sensor 2 to the second sensor 3. In this case, the catapults are turned on either manually by a trainer or a BVI b operating in mode I. After each attempt, the coach tells the athlete the indicated time.

In the second stage, the task is also performed at the highest speed. But this time, the coach asks the occupant how much time, in his opinion, he performed the movement. The mode of operation of the catapult is set as in the first stage. After this, the sportsman is informed of the actual time.

At the third stage, it is proposed to perform the exercise with a different, predetermined speed. With this BVI 6

works in mode II (figure 4. mode II), i.e. forming a pulse at a predetermined time interval. If the athlete performed the exercise for the time of ghz (Fig. 4, Pa mode), then at the second input of the element And 8 there is no signal, and the second input of the element And 11 receives the signal from the fourth output of the BVI b. At the output of the element 11, a signal is generated that includes the catapult 13. Similarly, in the case of FIG. 4, the Pb mode triggers a catapult 13, since there is no signal at the second input of the And 8 element. If the athlete performed the exercise in exactly the specified time interval, i.e. p-hz (FIG. 4, Iv mode), then the catapult 10 is triggered, because the inputs from element And 8 simultaneously receive signals from BVI 6 and from the sensor.

Training speed reaction dismembered method.

In this case, only the first sensor 2 is used. The switch T1 is set to position II. The action of the catapult 10 is directed to the sensor zone. In this case, all the indicated variants of the work of the catapults are possible.

The device allows you to train the speed of reaction and without the work of catapults, which can be used in the first stages of training an athlete. The use of catapults allows to train complex reactions with the issuance of urgent information to the athlete about the speed of the action performed, except in cases where this is not required by the method of training. That is, depending on how the catapult is triggered, the athlete can evaluate his actions. In all cases of the athlete's actions, the coach evaluates by block stopwatches and timing measurements.

The use of the BVI 6 scheme, which ensures that the unit operates not only in the pulse shaping mode at a predetermined time interval, but also in the pulse shaping mode, during which the athlete must perform the exercise, simplifies the algorithm of comparative analysis of the pulse shaping moments by the sensor and the BVI. The use of a differentiating chain, through which the signal from the sensor passes, makes it possible to isolate the initial moment of the formation of the signal and exclude its further arrival at the inputs of the AND elements, which also simplifies the control circuit. As a result, the electronic circuit of the proposed device is simplified 5-6 times as compared with the base device.

The proposed device can be used to train the reaction not only in volleyball, but also in other sports games.

Claims (2)

1. A device for training volleyball players, containing time blocks, indication and measurement, time parameters, first and second channels from the connected AND, OR and catapults elements, game action task block, outputs connected to the second inputs of the OR elements And the second inputs of the elements And, sensors, outputs connected to the block of measurement of temporal parameters and the block of the task of game actions, characterized in that, in order to simplify the device, a differentiating Chain, outputs connected to the second the inputs of the elements are And, and the input - with the fifth output of the block of the task of game actions, the input connected to the outputs of the block of time intervals. 2. The device according to claim 1, wherein the block of time intervals contains differentiating chains and waiting multivibrators, the starting input through the first differentiating chain connected to the input of the first waiting multivibrator, the first output of which is the first output of the block of time intervals, the second output is the third output of the block of time intervals and through the second differentiating chain is connected to the input of the second waiting multivibrator, the first output of which is the second, and the second - the fourth output block time intervals. Set long-2 / pi FIG. 7 / 7777 ////////// I U7 ///////////// G I93 rohnd p-b one CH7 / U Y / 7 // 777/7/77 //// JC one li / zonmashpi-r-hvutjfi 3t / Y one T2 //////////////, : 7, R I99 rohmd n-% g w and / kyog-g goxiig g И99 $ ohprd p-Ј d I99  n-i- Ј  UJ91 // 7W 02- |, gODCg About SC8ll7iL T pulse formation mode $ adancho / g duration impulse over a time interval T feti Brie ////////// g / / ////// / 77/7 A L № / №У / {/ Ј / У№М. WU (kr & z z catapult Kt5) Gr-G3 A D1L them ush / 2.ash (cpaSaroiDagT, catapa K 5) ty ///////// 77777 ds V (3 ipyj pa & a-n gaeT catapol-aKlo) feti ush / 2.ash (cpaSaroiDagT, catapa K 5) ty ///////// 77777 .