JPS6139632B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a start signal generator for competitions.

Conventionally, for example, to start a track competition, a gunpowder burst sound is used by a pistol, so a microphone is attached to the wrist of the starter's pistol to detect the burst sound, and this is used as a start signal to trigger a timing circuit. There is something that works.

In addition to this, there are some that operate a micro switch in conjunction with the hammer of a pistol to obtain a start signal.

Both types are prone to misfire troubles, and the probability of misfire is particularly high in rainy weather.

In the former case, there is a high risk that due to a detection error by the microphone, a timing start signal cannot be obtained despite the occurrence of a plosive sound, resulting in a "no time". In the latter case, it was necessary to adjust the explosion sound of the gunpowder and the time lag between the hammer and the microswitch, and it was extremely difficult to achieve an accuracy of, for example, 1/100th of a second using mechanical adjustment.

Additionally, both men also use manual timing to cover up for timing errors, which is started by checking for smoke coming from the pistol.

As a result, it was difficult to see smoke under strong winds or at twilight.

Therefore, the present invention eliminates timing errors by generating a start sound when the timing circuit starts timing by operating a start switch, and also emits light at the same time as the start sound to use it as a start signal for manual timing. It is.

An embodiment of the present invention will be described below based on the drawings. _S1 is the start switch, which is linked to the pistol trigger held by the starter. _S2 is a stop switch, and _S3 is a reset switch.
Q is a clock pulse generation circuit, C is a clock circuit, D
is a decoder, DP is a display device, F ₁ and F ₂ are flip-flop circuits, and G is a gate circuit. W is a one-shot pulse generator, A is an onomatopoeic synthesis circuit that generates a starting sound signal, and SP is a sound generating device. L is a light emitting device such as a xenon lamp, DR is a driving circuit thereof, and r to r are resistors.

In the above configuration, when the starter pulls the trigger and the switch _S1 closes, the flip-flop circuit _F1 is set and the gate circuit G is opened. Therefore, a clock pulse is supplied to the timekeeping circuit C, and timekeeping is started. With the start of this time measurement, the flip-flop circuit _F2 is set, and a pulse is generated from the one-shot pulse generator W. This pulse generates a start sound signal from the onomatopoeic synthesis circuit A, and a start sound is generated from the sound generating device SP.

On the other hand, the light emitting device L emits light due to the above pulse, and the manual timer sees this light and starts manual timekeeping.

Then, once you reach the goal, turn on the stop switch.
This closes _S2 and resets the flip-flop circuits _F1 and _F2 .

As described above, according to the present invention, the start sound is generated by the first reference signal supplied to the timekeeping circuit, so the start sound is generated only after the start of timekeeping is confirmed, and the start sound is generated. It is possible to eliminate timekeeping errors in which the timekeeping does not start even though the timer has been set.

In addition, the light is emitted at the same time as the start sound, making it easier for manual timers to confirm the start.
Manual timing can be performed reliably.

[Brief explanation of the drawing]

The drawing is an electrical circuit diagram showing an embodiment of the present invention. S ₁ ...Start switch, A...Onomatopoeic synthesis circuit, SP...Sound generation device, L...Sound generation device, C...
timing circuit.

Claims (1)

[Scope of Claims] 1. A signal generating circuit that generates a reference signal for timekeeping when a start switch is operated, a timekeeping circuit that measures time by receiving a reference signal from this signal generation circuit, and a signal that is supplied to this timekeeping circuit. A start signal generating device for competitions, comprising an onomatopoeic synthesis circuit that generates a starting sound signal based on an initial reference signal, and a sound generating device that generates a start sound in response to the sound signal. 2. A signal generation circuit that generates a reference signal for timekeeping when the start switch is operated, a timekeeping circuit that measures time by receiving the reference signal from this signal generation circuit, and a first reference signal supplied to this timekeeping circuit. Therefore, a start signal generation circuit for a competition includes an onomatopoeic synthesis circuit that generates a sound signal for a start, a sound generation device that generates a start sound in response to the sound signal, and a light emitting device that emits light in response to the first reference signal. Device.