SU1659078A1 - Device for indicating "out" balls - Google Patents

Abstract

This invention relates to sports games. The purpose of the invention is to simplify the device and increase noise immunity. The device is simplified by the introduction of differentiating chains, as a result of which the amount of equipment is reduced and noise immunity is increased. The device can be useful for judges to objectively control the ball - in the field or behind, near the boundary line. 1 hp f-ly. 2 Il.

Description

The invention relates to sports games and can be used to control the fall of the ball outside the playing field in volleyball.

The purpose of the invention is to simplify the design and increase noise immunity.

Figure 1 shows the structural diagram of the device; 2 shows timing diagrams for the operation of the device.

The device contains m 1, micro radio transmitter 2, receiver 3, NOT 4 element, first differential circuit (DC) 5, delayed element b, second differentiating circuit 7, m comparison blocks 8, m pressure sensors 9, indication block 10, differentiating circuit 11 , element 12, trigger 13, element 14, differentiating chain 15 and element 16.

The device works as follows.

MW 1 with microradio transmitter 2, while in the game, at any touch, radiates a radio signal, which is perceived and converted by receiver 3 into a signal of a certain duration hm (Fig. 2a). The digital indicator of the display unit 10 fixes the duration of the touch time. The same signal arrives at the input of the differentiating circuit 7, which at the time ti forms a pulse along the leading edge (Fig. 2b) and sends it to the 1st input of the And 12 element of the comparison unit 8 (Fig. 2b). At the end of the signal at the output of the element HE 4, a signal appears that enters the input of the differentiating circuit 5, which forms a pulse at the falling edge at time ta (fig.2d), which is delayed for some time T3 by the delay element 6 (FIG. 201) and sets the trigger 13 to its original state, in which the left shoulder is in state 1, and the right arm in state O.

The sensor 9, when sensing pressure (from the impact of the ball, the player's feet, etc.) generates a signal (FIG. 2e), which enters through the inputs of the comparison unit 8 to the input of the differentiating circuit 11 and the input of the HE element 14. At the same time, the circuit 11 forms at time ti by

ABOUT

ate

CHE VI

00

the leading edge of the signal is a pulse (Fig. 2g), which arrives at the 2nd input of the And 12 element, and a target 15 forms a pulse at the trailing edge of the signal at the time t2 (Fig 2a), which arrives at the input of the And 16 element.

If during the game the touch of the pad of one of the sensors occurs, the signals from the meter and the sensor enter the device at the same time. Then the differentiating circuits 7 and 11 simultaneously form pulses on the leading edge of the signals, which arrive at the 1st and 2nd inputs element 12. From the output of element 12 (fig.2i), the signal enters the input of the left arm of the trigger 13 and changes its state to the opposite, in which the 1st input of the element 16 enters 1 (fig. 2k).

At the end of the touch, the action of the signals ceases. At the outputs of the HE elements 4 and 14, the signals appear, according to which the differentiating circuits 5 and 15 form pulses, arriving respectively at the 2nd and 3rd inputs of the And 16 element. 16, a signal is generated (Fig. 2L), which is fed to the input of the display unit, indicating that the ball is out.

The signal from output 5 after a small delay by the delay element 6 sets the trigger 13 to its initial state. The delay is necessary so that the installation of the trigger 13 to the initial state occurs after the formation of the signal at the output of the element AND 16.

If the signals from the meter and the sensor do not enter the device simultaneously, i.e. m h does not touch the sensor, then at the output of the element 12 there is no signal, the trigger 13 keeps the zero level at the output of the right arm and, therefore, the 1st input of the element 16 does not receive a signal.

In the case of coincidence of the onset of the signals from the sensor and the meter, but with a different time of their termination, the following occurs. The trigger 13 generates at the output a signal that arrives at the 1st input of the element And 16. However, the signals at the 2nd and 3rd inputs of the element And 16 do not arrive simultaneously. In addition, at the end of the signal generated by the gun, the trigger 13 is reset. Thus, at the output of the comparison unit 8, there is no signal,

The operation algorithm of the signal comparison unit 8 ensures that the detector turns on only when the ball falls outside the playing field into the area of one of the sensors 9. At the same time, any other touch of the player by the player is fixed by a digital indicator according to the algorithm in the prototype.

Claims (2)

Claims 1. Device for detecting hit-outs, comprising a touch sensor The meter with the transmitter installed inside the meter, the receiver associated with the display unit, located around the perimeter of the playground pressure sensors connected to the comparison units, the output connected to the display unit, NOT elements, delays, characterized in that, in order to increase noise immunity, differentiating circuits are introduced into the device, with the first the differentiating circuit is connected to the receiver output through the NOT element and to the input of the delay element, the output of which is connected to the second inputs of the comparison units, and the second differentiating circuit is connected to the output of the receiver and the output to the third inputs of the comparison unit, while the input of the delay element is connected to the fourth inputs of the blocks compare. 2. Device pop. 1, characterized in that each comparison unit contains elements I. It is NOT, the RS flip-flop and the differentiating circuits, the first input of the comparison block being the first input the differentiating circuit and the element, the output of the first differentiating circuit is connected to the first input of the element I, the second input of which is the third input of the comparison unit and the output connected to the S input, the RS flip-flop, the R input of which is the second input of the comparison unit and the output The RS flip-flop is connected to the first input of the second element AND, the second input of which is the fourth input of the comparison unit, the third input is connected to the second differentiating circuit, and the output is the output of the comparison unit. 1