JPH0147753B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speed measuring device for measuring the speed of a baseball or the like.

Conventionally, when a pitcher 1 throws a ball 2 toward a net 3, a measuring circuit 4 emits radio waves or ultrasonic waves toward the ball 2, and the difference in frequency (wavelength) between the emitted wave and the reflected wave (Doppler effect) ) There is a speed measuring device that calculates the speed of the ball 2 from the pitcher 1.
A person is required to operate the speed measuring device at a position facing the ball, and it is not possible for one person to easily measure the speed of the ball.

That is, when one person wants to measure his or her own ball speed, for example, one person turns on the power to the speed measuring device, goes to a predetermined position, throws the ball 2, stores the measurement results during this time in the control device 5, and measures again. It is extremely troublesome to go back to the location and look at the measurement results, and the measuring device has the drawback of wasting a large amount of power. In fact, in a measurement device that oscillates radio waves using a Gunn diode, a current of 150 mA is consumed in the oscillating part at a power supply voltage of 8 V, which is a practical problem considering that it is generally used outdoors and is powered by batteries. Therefore, it is difficult to measure by one person using this method.

The present invention has been devised in view of the above matters,
A detailed explanation will be given below using an example shown in the drawings. still,
Identical parts between the present invention and the conventional example are designated by the same numbers.

Figure 1 is a usage diagram of a conventional speed measuring device.
2 is a pitcher, 2 is a ball, 3 is a net, 4 is a speed measuring circuit section, 5 is a control device for the measuring circuit section 4,
6 is a stand.

FIG. 2 is a block circuit diagram of the speed measuring device of the present invention, in which 51 is a general control circuit, 52 and 53 are operation switches, and 54 is an audio output device.

The operation switch 53 is a switch for switching between manual measurement and automatic measurement, and when it is turned on the contact 53a side, it constitutes a manual measurement circuit that measures the ball speed when the operation switch 52 is closed, and when it is turned on the contact 53b side. When the test is performed, an automatic measurement circuit is configured.

Now, when the operation switch 53 is turned on to the contact 53a side, an output signal Oa ₁ is generated to turn on and off the power of the measuring circuit 4 as shown in the timing chart of FIG.
becomes “H” level, and the power supply of the measuring circuit 4 is turned on.
Turn on.

Then, when the operation switch 52 is pressed and closed,
This is taken in by Ia ₀ , and the output signal Oa ₀ for turning on and off the power of the oscillation section of the measuring circuit 4 becomes "H" level, and becomes "L" level after speed measurement. Therefore, the measurement data Ia ₃ is transmitted from Ob ₀ to Obi to the display device 5.
5 is output.

Next, the automatic measurement mode will be explained with reference to the timing chart in FIG. Connect the operating switch 53 to the contact 53
When it is input to the b side, an instruction to output an oscillation sound of "beep" is issued from Oc ₀ to Oci to the audio output device 54 at regular intervals T. T is, for example, about 30 to 60 seconds, and the period Ti of the "H" level of Oa ₁ is, for example, about 5 seconds.

Then, after Oa ₁ reaches "H" level, Oa ₀
The sampling pulse signal that turns on and off the power of the oscillation part of the measurement circuit 4 is the sampling period Ts.
Appears every (for example, 0.2 seconds). This signal is continuously output only while Oa ₁ is at "H" level. The reason why the sampling pulse signal is generated intermittently is that there is no need to output the signal during the measurement value processing time and to save power. Further, the above Ts can be set according to the speed of the moving object.

The results measured every Ts are stored in the general control circuit 51, and the maximum speed is selected, and the result is Oc ₀
~Oci outputs the data, and the audio output device 54 pronounces, for example, "Kyuuji yugokiro."

At the timing of Oc ₀ to Oci in Fig. 4, I makes a “beep”.
Indicates the point in time when ``Kyuujiyugokiro''
indicates the point at which it is pronounced. The above operation is repeated every fixed period T.

Here, the audio output device 54 will be explained.

Taking the timing shown in FIG. 4 (b) as an example, the value of the start address of the word order pattern of the sentence (here, b) is output to the output ports Oc ₀ to ci of the general control circuit 51, and is latched into the address counter AC ₁ . Ru.
ROM ₁ contains as data the start address of each segment in ROM ₂ , which stores audio digital quantization information for word segments shown later.

Therefore, the data N10 is set in the address counter _AC2 , and _the D/A converter D/A, low pass filter LPF, driver
A signal is sent to the DR and then to the speaker SP, and audio is output. That is, "Kyuu" is sounded in accordance with the count up of the address counter _AC2 . An end code EF ₂ is included at the end of the "Kyu" information, and when the EF ₂ discriminator JEF ₂ detects this, the address counter AC ₂ is cleared and the address counter AC ₁ is counted up.

Therefore, N11 is set in the address counter _AC2 , and the sentence is repeatedly pronounced in the same manner. An end code EF ₁ is included at the end of (b), and when the EF ₁ discriminator JEF ₁ detects this, it clears the address counter AC ₁ .

With the above steps, it is pronounced as "Kyuujiyugokiro".

Incidentally, the signal "bleep" for turning on the power of the measuring circuit 4 may be audible "nage teku dasai" (please throw), or the display 55 may be made to flash "pikatsu". Also, if most of the power consumption of the measurement circuit 4 is consumed by the oscillation section, it is possible to divide the power supply into two parts, turn only the oscillation section's power on and off, and issue this signal. .

As described above, the present invention enables one person to easily throw the ball in accordance with the signal from the measuring device, measure the ball speed by energizing the measuring circuit only at this time, and output the result by voice. This has the remarkable effect of making it possible to economically measure moving objects such as baseballs.

[Brief explanation of drawings]

Figure 1 is a usage diagram of a conventional speed measuring device, Figure 2
Figure 3 is a block circuit diagram of the speed measuring device of the present invention.
The figure is a timing chart showing the operating mode of the manual measuring circuit in the speed measuring device of the present invention, Figure 4 is a timing chart showing the operating mode of the automatic measuring circuit in the speed measuring device of the present invention, and Figure 5 is the audio output. An explanatory diagram of the operation of the device is shown. 4: Measuring circuit, 51: General control circuit, 54: Audio output device.

Claims (1)

[Scope of Claims] 1. In a speed measuring device that measures the speed of a moving object such as a ball by irradiating radio waves or ultrasonic waves to the ball using the Doppler effect, a signal is given to turn on the power to the measuring circuit, and the measurement is performed simultaneously. Means for repeatedly turning on the power of the circuit and turning it off after a predetermined time Ti elapses at regular intervals; and sampling at a sampling period Ts during the predetermined time Ti while the power of the measuring circuit is turned on. It is characterized by comprising a control circuit having means for automatically measuring the speed of the moving object by continuously generating pulses, and means for outputting the measurement results from the measuring circuit in the form of audio. Speed measuring device.