KR19990038181A - Baseball glove having a means for measuring the speed of the baseball and baseball ball speed measurement apparatus using the same - Google Patents

Abstract

The present invention relates to a glove capable of measuring the speed of a baseball. The front surface of the glove according to the present invention is provided with a sensor capable of measuring the amount of impact, the electrical signal of the sensor is converted using a microcomputer and arithmetic processing to estimate the speed of the baseball. In order to estimate this estimation more accurately, data on the amount of impact is prepared and a correction operation is performed. The estimated speed of the baseball is displayed through a device such as an LCD.

Description

A baseball glove having a means for measuring the speed of a baseball and a baseball speed measuring apparatus using the same.

The present invention relates to a baseball glove for receiving a pitched baseball, in particular a baseball glove having a means for measuring the speed of the baseball by direct contact.

In general, a speed gun is usually used to measure the speed of a baseball. The speed gun is a device that is used in various ways to measure the speed of various objects, such as a car or an airplane, and measures the speed of an object by using a change in the amount of light of the object or a Doppler effect.

However, speed guns are complicated and expensive and are not widely available to the general public or baseball players. In addition, in order to measure the speed with a speed gun, there is a problem that a person or a device holding such a speed gun is required in addition to the person receiving the ball and the person throwing the ball.

SUMMARY OF THE INVENTION An object of the present invention is to provide a baseball glove having a means for measuring a speed of a baseball that can be manufactured relatively inexpensively and relatively cheaply, and a baseball speed measuring apparatus using the same.

It is another object of the present invention to provide a baseball glove having an additional function of recording a baseball player's pitching content in addition to the original function of the baseball glove, and a baseball measuring device using the same.

Still another object of the present invention is to provide a baseball glove that can more fully absorb the impact of a baseball to further protect the hands and wrists of the person wearing the baseball glove.

1 is a front view of a baseball glove according to the present invention;

2 is a rear view of a baseball glove according to the present invention; And

3 is a schematic block diagram of a microcomputer for processing signals of a sensor according to the present invention.

<Description of Symbols for Major Parts of Drawings>

1: glove 3: sensor

11: Thumb insert 27: Glove rear recess

28: connecting device 29: pocket

This object of the present invention is characterized in that it is provided with a shell of a predetermined shape for receiving the user's hand and protecting the user's hand from the impact of the baseball and means for measuring the speed of the baseball on the skin. Baseball gloves are achieved.

It is also an object of the present invention, the baseball glove for receiving the user's hand, and protects the user's hand from the impact of the baseball; Sensor means provided at a predetermined position on the baseball glove in contact with the baseball and outputting an electrical signal corresponding to an impact amount of the baseball that has collided on the baseball glove; And a microcomputer that receives the electrical signal of the sensor means and estimates the speed of the baseball.

Preferably, the apparatus for measuring the speed of the baseball is a strain gauge which is a sensor capable of measuring pressure, more preferably a strong impact resistance. Means for measuring the pressure are preferably provided on the front envelope wall of the baseball glove in contact with the baseball. One device for measuring the speed of such a baseball may be provided at the center of the baseball glove, but more preferably, a plurality of devices may be provided at various positions to determine the pitch of the baseball, or each corresponding position at various positions of the sensor. The signal for may be output. Instead of strain gauges, various sensors for measuring piezoelectric elements and other pressures may be used. Surfaces of these sensors can be provided with shock absorbing means having a low hysteresis in order to reduce the error value according to the service life of the glove while preventing damage to the sensor that may be caused by direct contact of the baseball.

Preferably, the device for measuring the speed of the baseball is connected to the microcomputer through a wire or the like. Such a microcomputer has a microprocessor, an input / output unit, a storage means, and predetermined input / output means. The input / output unit may be provided on the baseball glove or may be provided separately from the baseball glove. When the input / output unit is provided independently of the baseball glove, the input / output unit may be connected through a wire, and when the wire is inappropriate, an infrared communication means or the like may be used.

When the throwed baseball hits the baseball glove, the means for measuring the speed of the baseball sends a predetermined signal to the microcomputer, and the microcomputer measures the speed of the baseball through the size and time of the signal.

Preferably, the signal generated by the means for measuring the speed of the baseball is converted into a digital signal through the A / D converter, the microcomputer receives the signal and estimates the speed of the baseball using the data stored in the storage means do.

The method of estimating a baseball may be as follows. The sensor may estimate the speed of the baseball based on the maximum signal generated after contact with the baseball, and measure the speed of the baseball based on the integral of the signal over the duration of the impact. This is closely related to the performance of the microcomputer and the sensor, and different methods can be used depending on the available computers and sensors.

In the method of measuring the speed of a baseball based on the maximum value of a signal, a purpose can be achieved with a relatively small memory capacity. In this method, the stored value is updated whenever a higher value signal is input to the storage device, and the existing stored value is kept as it is when the input value is small. Then, the speed of the baseball can be estimated by reading the value of the storage means, ROM, or file that stores the relationship between the signal value and the speed. On the other hand, the method of measuring the speed of the baseball by the integral value requires a higher system specification because the signal value must be integrated over time.

A method for generating data for estimating the speed of a baseball from a signal of a sensor will be described below. While measuring the speed of the ball thrown by means of a speed gun or the like, the signal generated by the sensor when the ball hits the baseball glove is measured. The signal values of the corresponding sensors are stored for various speeds. As described above, in the case of a sensor having a plurality of sensors or outputting signals for various positions of the sensors, a plurality of input values for changes in pitch are also stored. The speed value of the baseball measured by the sensor signal value and the speed gun of the thrown baseball is stored. Based on these data values, interpolation can be performed to estimate the speed of the baseball.

However, in the case of measuring data on various types of gloves with a speed gun, it is possible to prepare relatively accurate data, but it may be inefficient. The glove may be different in material, thickness, shape, and the like, and accordingly, a difference may occur in the measured value of the sensor even for the same baseball speed. In order to eliminate this error, it is necessary to prepare sensor measurement and baseball speed data for each glove with a speed gun, but since it is uneconomical, the following method can be used. First, a reference glove equipped with a sensor according to the present invention, and an impactor specially designed for applying a predetermined impact value to the glove are prepared. This impactor applies a predetermined impact to the sensor attached to the glove. A function of the velocity value of the baseball and the impact value of the impactor by comparing the impact value according to the impactor and the measured value of the glove sensor and comparing the data with the speed data of the baseball and the speed value measured by the baseball with the speed gun. Find a relationship. After obtaining this functional relationship, the speed of the baseball measured by the speed gun for the various gloves is not compared with the measured value of the sensor, and the sensor can be easily measured by the impact machine at the factory producing the glove. Signal value can be corrected.

The data thus measured is preferably displayed by display means such as an LCD. In addition, the above-described microcomputer can be provided with a program that can provide statistical data on the pitching speed and pitch of each athlete. Such a program may be structured to provide a systematic management record for each athlete.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings, but the present invention is not limited to this embodiment.

1 shows a front view of a glove according to the invention. The glove 1 according to the present invention is provided with a pocket 29, and a single sensor 3 is inserted into the pocket 29 in a downward direction. Using this method has the advantage that the exchange of the sensor can be made very convenient. The envelope of the pocket here serves as the aforementioned shock absorbing means. As can be seen in the rear view of FIG. 2, the signal generated from the sensor 3 is transmitted to the connecting device 28 via a wire. The connection device 28 and the corresponding connector (not shown) are used to transmit the signal of the sensor to the microcomputer. The connecting device 28 is fixed to the glove rear recess 27 by using an adhesive. Some of the mandatory operations in the glove according to the invention, for example the actuation of the sensor immediately before a baseball pitch, etc., are operated by a switch provided on the thumb insert 11 of the glove 1 (not shown).

In the present embodiment, a plurality of strain gauges are disposed on a plate-shaped rubber plate, and a sensor having a form of outputting a corresponding voltage according to the deformation of the rubber plate is used. Such a sensor also serves to reduce the amount of impact of the baseball that can be applied to the user wearing the glove.

The process input to the microcomputer and processed is shown in FIG. The signal of the sensor 3 is input to the first input unit 15 of the microcomputer via the connecting device 28 of the glove 1 according to the invention. The first input unit 15 is provided with a signal amplification circuit, an A / D converter, a sampling circuit, and the like, which can be easily understood by a person skilled in the field of interfacing. Is converted to. The CPU reads out the speed value corresponding to the digital value from the storage means 25, or if there is no accurate speed value corresponding to the signal, one speed value higher than the speed value corresponding to the signal value and one speed value lower than this value. And then interpolate linearly or nonlinearly to estimate the baseball speed. In the present embodiment, there are two modes in the method of performing these operations. One is a mode of estimating the speed of the baseball based only on the digital value of the signal of the sensor 3 described above without performing a separate operation, and the other is a history of the usage period of the sensor. The variable (A1) to compensate for the phenomenon, the variable (A2) to compensate for the change in elasticity according to the use period of the baseball, and the variable (A3) according to the palm elasticity by the person using the glove are included in the digital value described above. This is a mode for multiplying and estimating the final result speed based on this. If a sufficiently accurate speed is measured in the electronic mode, it will not be necessary to use the latter mode. The predetermined signal from the input means 35 having a keyboard or switch panel or the like is transmitted to the second input unit 30. The input means 35 performs an operation for operating the glove of the present embodiment, and makes it possible to perform various operations. The CPU 20 and the storage means 25 perform a correction operation on the signal of the first input portion 15 to display the necessary information to the output means 45 through the output portion 40. In the present embodiment, the output means 45 is configured as LCD, but CRT or the like may be used. The signal from the switch provided to the thumb insert 11 was configured to enter the first input.

In the present embodiment, the glove user switches the microcomputer to the sensor signal detection state by a switch provided in the thumb insertion unit 11 before the opponent throws the baseball. Accordingly, the microcomputer measures the present sensor signal value and stores the signal value as a reference signal and stores it in the storage means. Until the baseball hits the glove, the microcomputer stores the digital signal for the received sensor signal value in the storage means. If the signal is continuously input and a signal larger than the previous signal is input, the value stored in the storage means is updated, but otherwise, the previous value is maintained in the digital value. This state continues until the user using the glove releases the sensor signal detection state with the switch provided in the thumb insert 11. Therefore, only the maximum impact value is finally left in the storage means. Based on this maximum impact value and the above-mentioned reference signal, necessary calculations are performed to estimate the speed of the baseball.

The glove according to the present invention can easily measure the speed of the baseball, and can measure the pitch of the baseball through the arrangement and program of the appropriate sensor. In addition, the program has a built-in function to record and calculate pitching records, so that the pitching of baseball players can be managed statistically and scientifically with a small number of people and at a low cost.

Claims (2)

In the baseball glove to receive the thrown baseball, An outer skin of a predetermined shape for receiving a user's hand and protecting the user's hand from the impact of the baseball; And And a means for measuring the speed of the baseball on the outer skin. In the device for measuring the speed of the baseball thrown, A baseball glove for receiving a user's hand and protecting the user's hand from the impact of the baseball; Sensor means provided at a predetermined position on the baseball glove in contact with the baseball and outputting an electrical signal corresponding to an impact amount of the baseball that has collided on the baseball glove; And And a microcomputer for calculating the speed of the baseball by receiving an electrical signal from the sensor means.