JPH01218473A - Stroking device for sports - Google Patents

Abstract

PURPOSE:To evaluate and decide an actual stroke condition by fitting a sensor to detect oscillating energy to a stroking tool main body, analyzing an output signal, and executing the evaluation decision. CONSTITUTION:An acoustic sensor 5 is fitted to the part of a cavity 6 inside a handle 3. The acoustic sensor 5 measures the oscillation of the air of the cavity 6 generated by the oscillation, and a first band-pass filter 9 of a signal processing part 7 extracts an oscillating energy component Ef1 of an inherent oscillating frequency f1 of the whole of a stick 2. A second band-pass filter 10 extracts an oscillating energy component Ef2 of an oscillating frequency f2 of represent the inherent oscillation of a hammer 4 of the stick 2. An energy ratio Rr at the time of a just meet is set at a setting part 13 beforehand, and the ratio Rr and an energy ratio (Ef2/Ef1)=RS of a measured energy calculated by a second arithmetic part 14 are compare-operated by a third arithmetic part 15, and when the result is approximate to '1', the 'just meet' is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a batting device such as a stick used in a game of gateball or a bat used in a baseball game.

In addition to the above-mentioned conventional hitting devices for technical athletics, there are many other hitting devices such as golf clubs and tennis rackets.

For example, when using a gateball stick, when hitting a ball with the stick, the player relies solely on his or her senses to judge whether the stick collided with the core of the ball, how strong the hitting force was, etc. is the current situation. This also applies to other athletic hitting devices.

Problems to be Solved by the Invention If a player is skilled, he or she can accurately evaluate and judge the state of the batting based on his or her senses, but other players are unable to accurately evaluate and judge their own play. Therefore, it has conventionally been desired to electrically measure, evaluate, and judge the state of the impact.

SUMMARY OF THE INVENTION An object of the present invention is to provide a batting device that can electrically measure the state of a bat through a batting instrument body such as a stick or a bat, and electrically evaluate and determine the state of the bat.

Means for Solving the Problems The athletic hitting device of the present invention includes a sensor for detecting vibration energy attached to the hitting instrument body, and analyzes a specific component of the frequency components of the output signal of the sensor to determine the strength of the hitting. , the degree of hit, and the flight distance.

Effect: According to this configuration, the reaction force generated when the striking instrument body collides with the object to be struck is transmitted through the striking instrument body as vibration energy. The sensor converts this vibration energy into an electrical signal, and the signal processing section evaluates and determines the actual hitting state based on the correlation between the specific frequency component of the sensor and the hitting state.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 shows an embodiment in which the present invention is applied to a gateball stick. A stick 2 that hits a ball 1 is
It consists of a handle 3 whose upper part is held by the player's hand, and a mallet 4 that is connected to the lower end of the handle 3 and collides with the ball 1. It is attached to part 6. A signal processing section 7 analyzes the output signal of the acoustic sensor 5, and is connected to the acoustic sensor 5 through a cable 8. The signal processing section 7 is configured as follows. It has been confirmed that when the ball 1 is hit with the stick 2, the reaction force is transmitted to the stick 2, causing the stick 2 to vibrate. The acoustic sensor 5 measures the vibrations of the air in the cavity 6 generated by the above vibrations.

The first bandpass filter 9 of the signal processing unit 7 extracts the vibrational energy component Et of the natural frequency f1 of the entire stick 2.
Extracting z. The second bandpass filter 10 extracts a vibration energy component E1 having a frequency f2 representing the natural vibration of the mallet 4 of the stick 2.

Figure 2 shows the changes over time in the f1 and f2 configurations during impact, and the area indicated by hatching [fl,
The integral value of the level of f2] represents Eta and Et, respectively. Eft, E, and 2 change depending on the strength of the blow, but Elm is the display device that makes the change noticeable! At 11, an index representing the strength of the blow or a rank of strength is displayed by comparing this index. Weight of ball 1 [230g
:t-10g] is determined, so the flight distance of ball 1 can be expressed by the function F□(El) of El,
The first calculation unit 12 calculates FyuC'Etx), and this is displayed on the display ffl! 11 is displayed.

The degree to which the mallet 4 hits the ball 1 is displayed on the display device 11 in a linear manner.

When mallet 4 hits the core of ball 1 [just meet]
It has been confirmed that (El2/Et1) changes between when it is off-center and when it is off-center. The energy ratio Rr at the time of just meet is set in advance in the setting unit 13, and this and the energy ratio (Eg1/Et□)=Rs of the actual measured energy calculated by the second calculation unit 14 are set in the third calculation unit 1.
5, and in the display device 11, (Rs/Rr)=
If RM is close to "1", "just meet" is displayed.

In the above embodiment, the display of the strength of the blow was determined only according to El, but the function F2 (Eeyu*E
By calculating as ti), it is possible to perform an evaluation judgment that is closer to the actual value.

In the above embodiment, the flight distance display was determined by Fz (Era) only in accordance with Elm, but E, 1 and Et
By calculating as a function F3 (Ertt El2) of a, it is possible to perform an evaluation closer to the actual value.

F2 and F3 in each of the above embodiments can be determined by empirical formulas.

In the above embodiment, there is a cavity 6 in the handle 3 of the stick 2.
As shown in FIG.
7 and place the acoustic sensor 5 in the cavity 16 of this box 17.
Vibration energy can be detected in the same way even if a stick is attached, and each vibration energy can be measured regardless of whether or not there is a cavity 6 in the handle 3 of the stick.

In each of the above embodiments, vibration energy is detected at intervals through the acoustic sensor 5, but as shown in FIG. It goes without saying that the sensor 17 can be used to measure various types of sensors such as an acoustic sensor, a pressure sensor, an acceleration sensor, and a vibration sensor.

In each of the above embodiments, the signal processing unit 7 is configured to evaluate and display three types of impact strength, flight distance, and hit condition. However, the results of the evaluation can be used for batting practice.

Effects of the Invention As described above, according to the present invention, the signal processing section analyzes a specific frequency component of the output signal from the sensor attached to the main body of the hitting instrument, and determines the strength of the hit, the degree of impact, and the flight distance. Since the configuration is configured to evaluate at least one of the elements, it is possible to conduct the evaluation and determination electrically without relying on the player's own senses.

It is particularly effective as a practice device because it allows you to relatively compare the state of each hit.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the athletic hitting device of the present invention;
FIG. 2 is a waveform diagram of a main part of the same device, and FIGS. 3 and 4 are explanatory diagrams showing other embodiments of the sensor. 2... Stick [hitting instrument main body], 5... Acoustic sensor [sensor], 7... Signal processing section. Agent Yoshi Morimoto Private information 7 fF Figure 2 rl -1-Ska, 74@Ii Hidedo Higashi [2...s”y417h Yori-kun recommendation banquet 1st shift N two horizontal runs 28, 3rd Figure g / Figure 4

Claims (1)

[Claims] 1. A sensor that detects vibration energy is attached to the main body of the hitting instrument, and a specific component of the frequency components of the output signal of the sensor is analyzed to evaluate at least one of the strength of the hit, the degree of impact, and the flight distance. An athletic hitting device equipped with a signal processing section for determination.