JPS5885187A - Electronic time piece with vibration discriminator - Google Patents

Abstract

PURPOSE:To elevate the training efficiency of a sport requiring striking by informing of the vibration above a fixed level out of the vibrations transmitted to an electronic wrist watch from a striking means at the impact. CONSTITUTION:A vibration sensor 1 converts the vibrtion of a wrist watch into an electrical signal, which is applied to a reversible counter 4 via a LPF3 after amplifier 2. Pulse signals above a fixed level are counted and a time alarming sound proportional to the count thereof is generated from an alarm 8 through a driving circuit 7 under the control of a control circuit 9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic timepiece with a vibration determination device that determines the number or duration of vibrations whose amplitude exceeds a certain level.

In sports such as baseball, tennis, table tennis, and golf, the strength and skill of hitting a flying ball with a bat, racket, or other means of impact are the keys to winning or losing. The principle is to store energy while swinging the hitting means, supply that energy to the ball when hitting, and the ball gains kinetic energy to fly. In addition, the hitting means has a hitting center (sweet spot), and if you impact at this position, the energy transfer efficiency is good, you can get a powerful ball quality, and it is easy to control, so you can impact with a sweet spot. It is necessary. On the other hand, the energy that is not converted into kinetic energy of the ball remains in the striking means and causes natural vibrations, so the lower the transmission efficiency, the greater the vibration energy and the greater the vibration transmitted to the hand. Although the amplitude and frequency of vibration differ depending on the striking means, the further the excitation force is away from the sweet spot, the greater the excitation force will be, and it will take a longer time to decay. Therefore, it can be said that an impact that has a small amplitude and decays quickly is a penetrating impact.

An object of the present invention is to determine the quality of impact by measuring the number or time that the striking means vibrates with an amplitude above a certain level, and to appeal to the auditory or visual sense.

Hereinafter, a case will be described with reference to the drawings in which the device according to the present invention is installed inside an electronic wristwatch and is operated by vibrations transmitted from a striking means to the electronic wristwatch via the wrist.

FIG. 1 is a block diagram outlining the invention.

1 is a vibration sensor, 2 is an amplifier circuit, 3 is a lohas filter, 4 is a reversible counter, 5 is a decoder, 6 is a control circuit, 7
8 is an alarm drive circuit, 8 is an alarm, and 9 is a clock circuit. Here, the vibration sensor 1 converts the vibration of the wristwatch into an electrical signal, which is amplified by the amplification circuit.

The 21st (α, b) is the output waveform of the amplifier circuit 2 when a signal is input from the vibration sensor 1, and is a waveform in which a noise component is mixed into the low frequency natural frequency component caused by the striking means. FIG. 2 α shows the waveform when the ball is hit near the sweet spot, and FIG. 2 shows the waveform when the ball is hit at a position away from the sweet spot.

Figure 3 α and b are the output waveforms of the low-pass filter 3,
This corresponds to FIGS. 2a and b. Obviously, the amplitude when hitting at the sweet spot is smaller and decays faster.

FIG. 4 shows the reversible counter 4. This is an embodiment of the decoder 5 and the control circuit 6. 10,11°14.17,1
8, 19.22 is an AND gate, 5 is a decoder consisting of an inverted 5-person AND gate, 13.20 is an OR gate,
4 is a reversible counter consisting of a reversible 5-stage binary counter, 15 is an R-S latch, 16 is a D flip 70-tube, and 21 is a 2-stage binary counter. Next, the reversible counter 4 consisting of the above elements. Decoder 5. The operation of each part when an actual signal is input to the control circuit 6 will be explained.

FIG. 5 is a time chart for explaining the operation of each part. The input signal shown in FIG. 5 α is converted into the binary signal shown in FIG. , reaches the H# level, the latch 15 is set, the D flip 70 knob 16 and the AND gate 17 output one pulse of 32 KHz as shown in the figure d, resetting the counter 4 and Since one input terminal of the AND gate 19 is set to the 'H' level, a 16 Hz clock signal is applied to the counter 21. On the other hand, since the input signal is supplied to the reset terminal of the counter 21 via the OR gate 20, the output of the AND gate 22 (D) is at the -p'' level. When the reset input is removed and 3 pulses of the clock signal are input,
When the AND gate 22 becomes 1H# level, the upper counter 4 is placed in a down-counting mode, and a clock of 16H5E is supplied to the counter 4 via the AND gate 10 and the OR gate 13. Prevent clock signal input. Therefore, the counter 4 is counted down by a 16 Hz pulse, and when all the outputs Q1 to Q become "L" level, the AND gate 5 having the inverted input becomes "H" level, and the AND gate 20. The counter 21 is reset via the OR gate 22. That is, as shown in FIG. 5D, the output waveform of the AND gate 22 becomes "H# level" after (π×3)=α19 seconds after the input signal stops, and the 8 pulses shown in FIG. When input, πX(8-4): After maintaining the "H" level for 0.25 seconds, it becomes the 'L' level. Similarly, when 61 pulses are input, the level is maintained at ``H'' for 1.69 seconds, so if the alarm is driven during this period, an alarm will sound for the time corresponding to the vibration. Setting the latch 15 after receiving the input prevents malfunctions caused by sudden noise, and
This is to determine the minimum number of pulses to drive the alarm, and is not limited to four pulses.

The above embodiment is a method of driving an alarm, but 1. At the same time, it can also be displayed optically.

FIG. 6 shows an embodiment in which the counter is provided with a five-stage memory 25 for storing the number of input pulses, a decoder 24, a display drive circuit 25, and a display device @26. According to this embodiment, since the number of pulses caused by vibration is stored and displayed, it is possible to visually determine the quality of the impact.

Further, in the above two embodiments, the operation is performed depending on the number of times the vibration exceeds a certain level, but the operation can also be performed depending on the length of time during which the vibration exceeds a certain level.

Figure 7 shows -, while the signal is input continuously,
In this embodiment, a timer circuit for causing the counter 4 to count the pulses of t buffer 261, 27.z) is inserted between the low-pass filter 3 and the circuit shown in FIG. ANDGATE 29.30. It consists of an R-S latch 28. When the signal is input, the R-S latch 28 is set and the counter is reset as long as the signal continues, so the AND gate 29 is set to "L".
"If the signal is kept at the same level, and the signal stops, and 6 pulses of the 16HH clock signal are counted, the above AND gate 2
9 becomes 1H", the R-S latch 28 is reset. Also, the output of the R-8 latch 28 is connected to the AND gate 60 whose other input terminal receives the clock signal of 32H2+. The counter 4 counts the number of pulses corresponding to the time the signal is input.

Note that the number of stages of the counter and the frequency of the clock signal in the above three embodiments are determined depending on the natural frequency and damping time of the striking means, and are not limited to the above embodiments.

As described in detail above, among the vibrations transmitted from the hitting means to the electronic wristwatch at the time of impact, the amount of vibration above a certain level is notified. tennis, table tennis,
To clearly and easily notify the player and the instructor of the superiority or inferiority of batting when practicing batting in golf or the like. In addition, by optically displaying it, it is possible to know not only audibly but also visually, and by operating the circuit based on the duration of continuous vibration rather than the number of vibrations, it is possible to determine the relationship between the natural frequency of the striking means. This will give you an idea of the amount of time required for decay. Therefore, in the practice of sports that require batting means, the present invention has a great effect on improving batting, and the significance of the present invention is very great.

[Brief explanation of the drawing]

FIG. 1 is a block diagram according to the present invention. Figures 2 α and 4 are output waveform diagrams of the amplifier circuit, Figure 3 αlb is an output waveform diagram of the low-pass filter, Figure 4 is a configuration diagram of the reversible counter, decoder, and control circuit according to the present invention, and Figure 5
The figure is a time chart showing the operation waveforms of each part of the reversible counter, decoder and control circuit according to the present invention, FIG. 6 is a block diagram of the display means according to the present invention, and FIG. 7 is a timer circuit according to the present invention. 1... Vibration sensor 2... Amplifier circuit 3j-... Low pass filter 4... Reversible counter 5... Decoder 6... Control circuit 7...Alarm drive circuit 8...Alarm 21.27...2 stage binary counter 2
3...5 stage memory 24...decoder 25...display drive circuit 26...display device Figure 1 Figure 3 Figure S Figure q

Claims (1)

[Scope of Claims] (1) A vibration pickup and amplifier circuit that generates an electrical output proportional to at least the amplitude of vibration, and a circuit that converts the output voltage into a binary pulse signal based on a constant level;
An electronic timepiece with a vibration determination device, comprising a circuit that counts the number of binary signals, a control circuit that generates a time alarm sound proportional to the counted number, and an alarm drive circuit. (2) The electronic timepiece with a vibration determination device according to claim 1, further comprising means for optically displaying the count number. (8) The vibration determination according to claim 1, which includes a timer circuit that counts the number of pulses of a predetermined frequency during a period when the output voltage of a device that generates an electrical output proportional to the amplitude of vibration exceeds a certain level. Electronic clock with device.