JPH06178840A - Microwave type hitting speed measuring apparatus - Google Patents

Abstract

PURPOSE:To enable the measuring of a moving speed of a club head at the hitting of a ball and an initial speed of the ball hit by radiating a microwave to perform an arithmetic processing of the reflected wave from the club head and then, the reflected wave from the ball. CONSTITUTION:When a club is swung, a microwave is radiated from a Doppler sensor 1 with a function of radiating microwaves and when the hitting sound of the ball hit with the club is detected by a microphone 14, the reflected wave of a club head received by the Doppler sensor 1 undergoes an arithmetic processing at a first processing section 3 to calculate a moving speed of the club head at the hitting of the ball. The results of the calculation are shown on a display 7. Thereafter, among the reflected wave of the club head and the reflected wave of the ball received by the Doppler sensor 1, the frequency of the reflected wave of the club head is cut with a filter 9. Then, the reflected wave of the ball alone undergoes an arithmetic processing a[ a second processing section 8 to calculate the initial speed of the ball hit and the results of the calculation are shown on a display 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in practice of golf and the like, and is capable of measuring both the moving speed of the club head at the time of hitting and the initial speed of the ball hit. Type hitting speed measuring device.

[0002]

2. Description of the Related Art Conventionally, a plurality of magnetic sensors or photoelectric sensors are embedded in a base mat as a device for measuring the head speed during a swing of a golf club and the initial velocity of a hit ball. A device that detects the moving state and displays the head speed (Japanese Patent Publication No. Sho 63-29550, etc.), and processes the images taken by a high-speed camera or a video camera to display the head speed and the initial speed of the hit ball. And a device for measuring the velocity of a hit ball using a microwave Doppler radar (Japanese Patent Laid-Open No. 57-44).
No. 871) are known.

[0003]

However, in the case of the above-mentioned device, although it is inexpensive, it is necessary to swing right above the base mat, so that it is not convenient to use, and only the head speed can be measured. Met. In addition, in the case of the other device, there is an advantage that the measurement can be performed with high accuracy and the function is increased, but the circuit configuration for the image processing becomes very complicated, so that there is a disadvantage that the device becomes expensive. . In the case of the further device, only the speed of the hit ball can be measured, and the speed of the club head is not measured together.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to radiate a microwave and perform arithmetic processing on the reflected wave to obtain a club head When calculating the moving speed and the initial speed of the ball, the club head and the ball are in a state of overlapping at the moment when the ball is hit, so the reflected wave at that time is processed to calculate the moving speed of the club head. After hitting, the club head and the ball are separated, so the reflected wave of the club head is cut out of the reflected waves at that time, and only the reflected wave of the ball is arithmetically processed to calculate the initial velocity of the ball. Accordingly, it is an object of the present invention to provide a microwave-type hitting speed measuring device capable of measuring the moving speed of the club head at the time of hitting and the initial speed of the hit ball.

That is, according to the present invention, in order to achieve the above object, a microwave radiator for radiating a microwave from behind the ball placed at the ball set position and a club head at the time of swing is hit. A microphone that detects the hitting sound of the hit ball, a Doppler sensor that receives the reflected wave of the microwave from the club head during the swing and the reflected wave of the microwave from the hit ball, and the microphone that hits the ball. When detecting the, the first processing unit for processing the reflected wave of the club head received by the Doppler sensor to calculate the moving speed of the club head, and the reflected wave of the club head received by the Doppler sensor thereafter and the ball Of the reflected waves, the reflected wave of the club head is cut, and only the reflected wave of the ball is calculated and the A second processing section for calculating the initial velocity of Le, the one in which the calculated processing result has a structure that includes a display means for displaying each by each processing unit.

Further, according to the present invention, a third processing unit for calculating the flight distance of the ball on the basis of the processing result of the second processing unit for calculating the initial velocity of the ball and the processing result from the third processing unit. It is also characterized in that it has a display means for displaying.

[0007]

With the above construction, the club head and the ball are in an overlapping state at the moment when the ball is hit by the swing of the club. In this state, the reflected wave from the club head is transmitted to the Doppler sensor. While being received, the sound of the ball striking the ball is detected by the microphone. When the hitting sound of the ball is detected, the reflected wave of the club head received by the Doppler sensor at the time of the detection is arithmetically processed in the first processing unit that calculates the moving speed of the club head, and the processing result is displayed on the display means. Is displayed. Therefore, from this display, the moving speed of the club head at the time of hitting can be known.

On the other hand, since the ball after hitting will fly in a direction different from the swing trajectory of the club head, the club head and the ball will be in a separated state after that, and in this state, reflection from the club head will occur. The waves and the reflected waves from the hit ball are received by the Doppler sensor. Therefore, if the reflected wave of the club head is cut out of the received reflected waves, only the reflected wave of the ball is arithmetically processed in the second processing unit that calculates the initial velocity of the ball, and the processing result is It is displayed on the display means. Therefore, the initial velocity of the ball hit can be known from this display.

When the processing result of the second processing unit for calculating the initial velocity of the ball is further processed by the third processing unit for calculating the flight distance of the ball and the processing result is displayed on the display means, From the display, the flight distance of the ball hit can be known.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a Doppler sensor that also has the function of a microwave radiator that radiates a microwave beam of a predetermined frequency, and is installed, for example, about 1 meter behind the ball B placed at the ball set position in the striking direction.
Reference numeral 2 is an amplifier that amplifies the Doppler signal of the reflected wave received by the Doppler sensor 1, and 3 is a first processing unit that calculates the moving speed of the club head at the time of impact by processing the output from the amplifier 2. It is configured by a computer including a comparator 4, a counter 5, and a divider 6. Reference numeral 7 is a display as a display means to which the output from the divider 6 is inputted, and the moving speed of the club head H calculated by the first processing unit 3 is digitally displayed. The second 8 calculates the initial velocity of the ball hit by calculating the output from the amplifier 2
The processing unit is composed of a computer including a filter 9 for cutting frequency components below the frequency of the reflected wave of the club head H, a comparator 10, a counter 11, a divider 12, and a delay circuit 16 described later. Reference numeral 13 is a display as a display means to which the output from the divider 12 is input, and is adapted to digitally display the initial velocity of the ball B calculated by the second processing section 8. Although not shown, when the Doppler signal of the reflected wave output from the amplifier 2 is processed by the first processing unit 3 or the second processing unit 8, after the Doppler signal is converted into a digital signal by the A / D converter, , Are to be processed.

Reference numeral 14 is a microphone for detecting the hitting sound of the ball B hit by the club head H during a swing.
It is installed in parallel with the Doppler sensor 1. The microphone 14 outputs a signal when it detects the hit sound of the ball B, and the output signal is the amplifier 1
After being amplified by 5, the signal is input to the counter 5 of the first processing unit 3 and to the filter 9 of the second processing unit 8 via this counter 5 and to the counter 11 via the delay circuit 16 to receive these counters. 5, the filter 9 and the counter 11 are activated. Reference numeral 17 represents a power source.

The operation of the above embodiment will be described below.
At the moment when the ball B is hit by the swing of the club, the club head H and the ball B are in a state of overlapping (state shown by the solid line in FIG. 2), and in this state, the milo wave reflected from the club head H The reflected wave is received by the Doppler sensor 1, and the sound of the ball B hit by the hit is detected by the microphone 14. When the hitting sound of the ball B is detected, the reflected wave of the club head H received by the Doppler sensor 1 at that time is arithmetically processed by the comparator 4 of the first processing unit 3 which calculates the moving speed of the club head, and the Doppler The degree of deviation from the frequency radiated from the sensor (microwave radiator) 1 is detected, and the moving speed of the club head H at that time is calculated from the degree of deviation. An output from the microphone 14 is generated by detecting the hitting sound of the ball B, and the output is input to the counter 5 of the first processing unit 3 via the amplifier 15, so that the counter 5 is activated. When the counter 5 is in the operating state, the processing result calculated by the comparator 4 is input to the display 7 via the divider 6, and the display speed of the display 7 indicates the moving speed of the club head H at the time of hitting. be able to. In the above case, after the hitting sound of the ball B is generated by hitting, there is a time delay of about 5 mS (5/1000 seconds) until the hitting sound is detected by the rear microphone 14. The reflected wave of the club head H is processed by the first processing unit 3
In the calculation processing in, the microphone 14 is set to calculate the Doppler signal of the reflected wave received by the Doppler sensor 1 5 mS before the time when the hit sound of the ball B is detected.

On the other hand, since the ball B after hitting will fly in a direction different from the swing trajectory of the club head H, the club head H and the ball B will be in a separated state thereafter (two points in FIG. 2). (State of chain line), in this state, the reflected wave of the Mylok wave reflected from the club head H and the reflected wave of the microwave reflected from the hit ball B are received by the Doppler sensor 1.

Depending on the type of club used, when the ball B is hit by a wood club, for example, the initial velocity of the ball B is usually faster than the moving velocity of the club head H. , The reflected wave from the ball B has a higher Doppler frequency than that from the club head H (FIG. 3). Therefore, when the reflected wave of the club head H and the reflected wave of the ball B received by the Doppler sensor 1 are input to the comparator 10 of the second processing unit 8 via the amplifier 2, those that are equal to or lower than the frequency of the reflected wave of the club head H. Has its frequency component cut by the filter 9, and only the reflected wave of the ball B is input to the comparator 10 for arithmetic processing, and the degree of deviation from the frequency radiated from the Doppler sensor (microwave radiator) 1 is detected. Along with
The initial velocity of the ball B at that time is calculated from the degree of deviation. The microphone 1 is detected by the hitting sound of the ball B.
The signal output from 4 is delayed by the delay circuit 16 until the reflected wave from the ball B is received by the Doppler sensor 1 and then input to the counter 11, so that the counter 11 is activated. When the counter 11 is in the operating state, the calculation result calculated by the comparator 10 is input to the display 13 via the divider 12, and the initial speed of the ball B hit by the display 13 is known. You can

The reflected wave of the ball B is measured by the Doppler sensor 1
When receiving by, the head H of the swung club
When hiding behind the body of the person who swung, that is, when the hit ball B flies 2-3 meters, the reflected wave of the highest quality waveform can be received. Therefore, the reflected wave received at that time is received by the comparator 10. Timing is set to perform arithmetic processing.

The Doppler sensor 1 receives the reflected wave from the club head H and the reflected wave from the hit ball B as well as the reflected waves from various peripheral objects in a mixed state. A function is provided for searching a high-quality waveform portion in the reflected wave of the club head H and the reflected wave of the ball B, and the high-quality waveform portion is arithmetically processed in the respective processing units 3 and 8.

In the above description, it is assumed that the initial speed of the ball B hit is faster than the moving speed of the club head H at the time of hitting. However, in some cases, the moving speed of the club head H is high. The initial velocity of the ball B may be slower than that. In such a case, the ball B
Since the reflected wave from B has a Doppler frequency lower than that of the club head H, it is processed by the filter 9 when the reflected wave of the ball B is input to the comparator 10, and is attenuated to the comparator 10. Is entered.
Even in such a state, the comparator 10 can perform the arithmetic processing. However, depending on the initial velocity of the ball, the attenuation degree of the reflected wave of the ball B is large, and thus the arithmetic processing may not be possible. In that case, it is preferable to display the miss shot on the display 13 or the like.

In the above embodiment, the case where the moving speed of the club head at the time of hitting and the initial speed of the hit ball are measured has been described. Furthermore, the flight distance of the ball is determined based on the initial speed of the ball. By calculating and displaying it, the flight distance of the ball can also be measured. That is, it is generally known that the flight distance of a ball hit is four times the initial velocity of the ball. Therefore, in the above-described embodiment, the second processing unit 8 that calculates the initial velocity of the ball B Third, calculating the flight distance of the ball based on the processing result
By providing the processing section and the display means for displaying the processing result calculated by the third processing section, the flight distance of the ball can be measured. Since a device for calculating the flight distance of the ball based on the initial velocity of the ball is already known, the third processing unit may be configured using such a device. Regarding the display means,
Other than the displays 7 and 13, other than the above, the display 7 and the display 13 may also be used so as to alternately display the initial velocity of the ball.

[0019]

As described above, according to the present invention,
At the moment when the ball is hit, the club head and the ball are in an overlapping state, so the reflected wave received by the Doppler sensor at that time is arithmetically processed in the first processing unit to calculate the moving speed of the club head, and After hitting, the club head and the ball are in a separated state. Therefore, of the reflected waves received by the Doppler sensor at that time, the reflected wave of the club head is cut, and only the reflected wave of the ball is arithmetically processed in the second processing unit. Since the initial velocity of the ball is calculated by using a microwave type striking speed measuring device capable of accurately measuring the moving velocity of the club head at the time of striking and the initial velocity of the ball hit by a simple structure. Is obtained.

Further, according to the present invention, the first processing unit, the second processing unit, and the like can be configured by using an LSI such as a microprocessor, and can be implemented with a simple circuit configuration, so that the size is small. There is an advantage that the device can be provided relatively inexpensively.

Further, a third processing unit for calculating the flight distance of the ball based on the processing result of the first processing unit for calculating the initial velocity of the ball, and display means for displaying the processing result from the third processing unit. In addition to the moving speed of the club head and the initial speed of the hit ball, the flight distance of the hit ball can be measured, so that a microwave hitting speed measuring device that is more convenient to use can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a correlation diagram of a positional relationship between a club head and a ball when hit.

FIG. 3 is a density distribution diagram showing spectra of a reflected wave of a club head and a reflected wave of a ball.

[Explanation of symbols]

1 Doppler sensor having the function of a microwave radiator 3 First processing unit 7 for calculating the moving speed of the club head 7 Display (display means) 8 Second processing unit for calculating the initial speed of the ball 9 Filter 13 Display (display means) ) 14 microphone B ball H club head

Claims (2)

[Claims] 1. A microwave radiator that radiates microwaves to a ball placed at a ball set position from behind in a striking direction, and a microphone that detects a hitting sound of a ball hit by a club head during a swing. , A Doppler sensor that receives a reflected wave of a microwave from a club head during a swing and a reflected wave of a microwave from a struck ball, and a Doppler sensor when the microphone detects a ball hitting sound The first processing unit that calculates the moving speed of the club head by calculating the reflected wave of the club head, and the reflected wave of the club head and the reflected wave of the ball received by the Doppler sensor after that,
A second processing unit that cuts the reflected wave of the club head and calculates only the reflected wave of the ball to calculate the initial velocity of the ball, and a display unit that displays the processing result calculated by each processing unit. Microwave type hammering speed measuring device equipped with. 2. A flight distance of the ball is calculated based on a processing result of a second processing unit which calculates an initial velocity of the ball.
The microwave type hammering speed measuring device according to claim 1, further comprising a processing unit and a display unit for displaying a processing result from the third processing unit.