JPS6244275A - Golf swing analyser - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a golf swing analysis device for visually analyzing a golfer's swing motion.

[Prior art]

A device for visually analyzing a golfer's swing motion is known. For example, JP-A-60-2486
Publication No. 4 discloses a golf swing analysis device that displays on a display television a video image of a golfer's swing motion and data showing the time course of the weight distribution on the golfer's legs during the swing, superimposed on the video image and the data showing the time course of the weight distribution on the golfer's legs during the swing. .

[Problem that the invention seeks to solve]

When visually analyzing a golf player's swing motion, it is important to examine not only continuous changes in swing form but also the form at ball impact. When examining a swing motion in detail, the swing motion video is usually played back in slow motion, frame by frame, or as a still image. However, the swing motion near the pole impact is very fast, so if you use commonly available video recording equipment,
It is not always possible to reliably capture the image of the form at the time of ball impact. Using a super-high-speed video camera increases the possibility of capturing footage of the ball impact, but the drawback is that it becomes a very expensive system.

[Means for solving problems]

As a means for solving the above-mentioned problems, the present invention provides a first photographing device that continuously photographs the golfer's swing motion, converts it into a video signal, and outputs it, and a first photographing device that continuously photographs the golfer's swing motion, converts it into a video signal, and outputs it, and a first photographing device that captures the golfer's form at the time of ball impact during the swing. A second photographing device takes a picture, converts it into a video signal, and outputs it, and synthesizes the video signal output from the first photographing device and the video signal output from the second photographing device, and generates a temporal change in the golfer's swing motion. A golf swing analysis device is provided, comprising a video signal processing means for displaying a series of composite images representing the following on a display television.

[For production]

According to the above means, the golfer's swing motion is continuously photographed by the first photographing device, while the swing form at the time of ball impact is photographed from approximately the same location by the second photographing device.

The video signal output from the second photographing device is combined with the video signal output from the first photographing device by a video signal processing device, resulting in a series of composite images representing the time course of the golfer's swing motion, which is displayed on the display television. Is displayed. In this way, the swing form at the time of ball impact can be reliably captured using a second imaging device that is separate from the first imaging device for continuous imaging, so an expensive high-speed video imaging device is not required and an inexpensive The equipment will enable detailed examination of the time course of swing motion, including impact form.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the overall configuration of a golf swing analysis device according to a first embodiment of the present invention. In the same figure, 1
1 is a general video photographing device as a first photographing device for continuously photographing a golfer's swing motion;
Reference numeral 12 denotes an electrophotographic photographing device as a second photographing device arranged adjacent to the video photographing device 11, 13 a weight distribution measuring device for measuring changes in the golfer's weight distribution, and 14 a golf club during swing. 15 is a CRT display 1; a swing characteristic measuring device for measuring the movement of the ball, the speed of the hit ball, the flight direction, etc.;
6 and a personal computer equipped with a disk drive device 17, 18 a keyboard manual device, 19 a video disk recording device, 20 an A/D converter, 21 a printer device, and 22 a video printer device.

As shown in FIG. 2, the weight distribution measuring device 13 includes a total load measuring stand 23 supported by three load detectors, e.g. load cells 23a to 23c, and three load detectors e.g. Load cell 24a-2
4c and a pair of one-legged load measuring stands 24°25 supported by 25a to 25c. When a golfer places both feet one foot at a time on the load measuring table 24.25, each load cell 23a-23c, 24a-24c, 25a-25
An electric signal corresponding to a change in the load applied to c is output from each load cell. Load cells 23a to 23c, 24a
From the relationship between the relative positions of ~24c, 25a ~25c and the load detected by each load cell, the time course of the weight distribution on both legs of the golfer and the time-dependent change in the position of the golfer's center of gravity on the horizontal coordinate plane are calculated. can be found.

As for the calculation method, for example, the method disclosed in Japanese Utility Model Application Publication No. 60-2573 can be adopted.

As shown in FIG. 3, the swing characteristic measuring device 14 includes a mat 26 having a ball support pin 27 at a predetermined position, and two rows of photoelectric conversion element groups 28 and 29 arranged vertically on one side of the mat 26. and a pair of light emitting element groups 30 and 31 that emit light beams from predetermined positions on the other side of the cloak 26 toward the photoelectric conversion elements 28 and 29, respectively. When the ball is hit, one of the light beams directed toward each photoelectric conversion element is blocked by the ball, so that a pulsed detection signal is output from the photoelectric conversion element whose light reception is blocked. The ball launch angle, ball launch speed, etc. can be calculated and determined from the relationship between the position of the light emitting element group 30, 31, the position of the photoelectric conversion element that outputs the detection signal, and the ball position at the time of impact. For example, as a calculation method, JP-A No. 5
The method disclosed in Japanese Patent No. 9-46982 can be adopted.

The swing characteristic measuring device 14 performs necessary calculations using an internally provided arithmetic processing device, and sends the data of the calculation results to the personal computer 15.

As shown in FIG. 4, the swing characteristic measuring device 14 includes a magnetic sensor 32 embedded in the mat 26. As shown in FIG. The magnetic sensor 32 is provided at a position immediately in front of the ball support pin 27 in the swing direction of the golf club 33. A permanent magnet 35 is embedded in the head 34 of the golf club 33, and when the head 34 of the swung golf club 33 approaches the magnetic sensor 32, the magnetic sensor 32
A detection signal is output from.

FIG. 5 is a circuit block diagram of an embodiment of the golf swing analysis device according to the present invention. In the figure, 40 is a microcomputer in a personal computer I5, and read-only memory (ROM) 41. It comprises a random access memory (RAM>42), a central processing unit (CPU) 43 with a clock signal generator, and an I10 interface 44, which are connected to each other by a bidirectional bus 45.

The load cells 238 to 25C of the weight distribution measuring device 13 are A
I10 interface 4 via /D converter 20
Connected to 4. Also, I10 interface 4
4 includes a data output terminal of the swing characteristic measuring device 14, a magnetic sensor 32, and a keyboard input device 18. Disk drive device 17, video printer device 22. Printer devices 21 and the like are connected to each.

Furthermore, the I10 interface 44 includes a video timer device 46 connected to the video camera 11, an electrophotographic device 12 having a built-in magnetic disk storage device 47, and a video signal synthesis processing section for synthesizing and outputting video signals. electronic switching switch 48, CRT display 16,
A video disc recording device 19 and the like as a video storage device are connected. A floppy disk 49 loaded into the disk drive device 17 stores in advance various programs necessary for swing motion analysis.

In the golf swing analysis device having the above configuration, when investigating a golfer's swing motion, the program stored in the floppy disk 49 is loaded, and a start signal is inputted using the keyboard 18, and a start command signal is sent to the video timer 46 via the I10 interface 44. is provided, and a video recording device 19 is provided.
A recording command signal is given to The video timer 46 starts timer counting and gives a signal to the video shooting device 11 to start shooting.

The video photographing device 11 photographs the golfer on the one-legged load measuring table 24.degree. 25 from the front, converts the video information into an electrical signal, and sends the electrical signal to the video timer 46. When the time preset by the video timer 46 has elapsed, the video photographing device 11
Alternatively, the photographing operation is ended when a command signal for stopping photographing is input from the keyboard 18.

The video signal output from the video photographing device 11 is superimposed with a timer count display signal in the video timer 46 and sent to one video signal input terminal 48a of the electronic changeover switch 48. The other video signal input terminal 48b of the switch 48 is connected to the video signal output terminal of the electrophotographic device 12. Signal output terminal 4 of switch 48
8c is connected to a signal input terminal of the superimpose processing section 50. When the input terminal 48a and the output terminal 48c of the switch 48 are connected, the video signal output from the video camera 11 is sent to the superimpose processing section 50 via the video timer 46 and the switch 48. , when the input terminal 48b and the output terminal 48c of the switch 48 are connected, the electrophotographic apparatus 1
The video signal output from 2 is sent to a superimpose processing section 50 via a switch 48. A signal output terminal of the superimpose processing section 50 is connected to a signal input terminal of the display 16 and the recording device 19.

After the start of video shooting by the video shooting device 11 until the end of the video shooting, the microcomputer 40 uses time-sharing interrupt processing to calculate data regarding the temporal transition of the weight distribution of the golfer.

That is, the microcomputer 40 receives the load cell 23 which has been converted into a digital signal by the A/D converter 20.
Output signals from a to 25c are I10 interface 4
4, and calculates data representing the magnitude of the load on the left and right feet of the golfer, the position of the golfer's center of gravity on the horizontal plane, etc. The data signal obtained by the calculation is sent to the I10 interface 44.
The signal is then sent to the signal input terminal of the superimpose processing section 50. Further, these data signals are stored on the floppy disk 49 as necessary. The data signal sent to the superimpose processing section 50 is superimposed with the video image signal in the superimposition processing section 50. The video image signal superimposed with the data signal is sent to the display 16 and also to the video recording device 19 where it is stored on a video disc.

The magnetic sensor 32 is connected to the golf club head 34 during the swing.
When the microcomputer 40 detects this and sends an output signal to the I10 interface 44, the microcomputer 40 performs the photographed image synthesis process shown in FIG. 6, giving priority to other processes. That is, referring to FIG. 6, when a detection signal is input from the magnetic sensor 32 to the I10 interface 44 (step 60), the microcomputer 40 detects the electrophotographic device 12.
A photographing command signal is sent to (step 61). Magnetic sensor 3
2. Rad 34 to the golf club at a position in front of the ball.
Therefore, there is a time lag between the time when the head 34 actually impacts the ball and the time when the magnetic sensor emits a detection signal.

The time for this deviation varies depending on swing speed, but
Since the time is minute, the electrophotographic device I2 can capture the golfer's form almost at the moment of ball impact. By adjusting the time interval from the time when the detection signal is input to the microcomputer 40 until the time when the photographing command signal is output to the electrophotographic apparatus 12 to match the average time difference, the photographing by the electrophotographic apparatus 12 can be easily performed. The timing of the ball can be more accurately brought closer to the timing of the ball impact. Electrophotography device 11
The impact form of the golfer photographed by 2 is converted into an electric signal and stored in the magnetic storage device 47.

In the next step 62, when a signal indicating that the video image signal captured by the video camera 11 immediately before the ball impact has been output from the video timer 46 is input from the video timer 46 to the I10 interface 44, the I10 An input terminal switching command signal is sent from the interface 44 to the electronic changeover switch 48, and the input terminal 48b of the switch 48 is connected to the output terminal 48C. Next, in step 63, a video signal output command signal is sent from the I10 interface 44 to the electrophotographic device 12, and the video signal is output from the electrophotographic device 12. The electrophotographic image signal sent to the switch 48 is superimposed with the data signal in the superimpose processing section 50, and is displayed on the display 16 and stored in the video recording device 19. After the predetermined time has elapsed, the process proceeds to step 64, where the I10 interface 4
4 to the switch 48, the input terminal 48a and the output terminal 48c are connected again, and the video image signal output from the video timer 46 is sent to the switch 48.
The image is then sent to the superimpose processing section 50.

As described above, the electrophotographic image signal that captures the impact form is synthesized between the video image signal that captures the form immediately before the ball impact and the video image signal that captures the form immediately after the ball impact. It is output from the changeover switch 48. Then, the video composite signal output from the switch 48 is superimposed with the data signal in the superimpose processing section 50, and is stored in the recording device 19 as video information.

Therefore, in the golf swing analysis device according to this embodiment, by the playback operation of the recording device 19, the swing motion video including the electrophotographic video stored in the recording device 19 and the data regarding the temporal transition of the weight distribution on both legs of the golfer are stored in the recording device 19. can be displayed on the display 16.

On the other hand, data signals such as head speed, ball speed, ball flight direction, etc., which are measured and calculated by the swing characteristic measuring device 14 during the swing, are stored on a floppy disk 49 through the I10 interface 44, and are recorded as images from the recording device 19. When the signal is reproduced, it is read from the floppy disk 49, sent from the I10 interface 44 to the superimpose processing section 5o, and superimposed on the video signal sent from the recording device 19 to the superimpose processing section 50. is displayed on the display 16. FIGS. 7(a) to 7fd) show the reproduction display state of the display 16. FIG. The golfer's swing form is projected approximately in the center of the screen of the display 16, and bar graphs indicating the amount of weight applied to the left and right feet are displayed on the left and right sides of the bottom of the screen. The timer count value is displayed in the upper right corner of the screen. FIG. 7(a) shows the swing form at address. In this screen, it can be seen that the golfer's weight is distributed almost evenly on both feet. Figure 7 (bl
shows the swing form during tickback. In this screen, it can be seen that the golfer's weight is mostly on his right foot. Figure 7tc) shows the swing form at pole impact.

This image was taken by the electrophotographic device 12. In this screen, it can be seen that the golfer's weight is mostly on his left foot. This screen also displays the head speed (H5) obtained by the swing characteristic measuring device 14.
) and ball speed (BS) are displayed in the upper left corner of the screen. FIG. 7fdl shows the follow-through state. In this screen, it can be seen that the golfer's weight is mostly on his left foot. Figure 7(a)
, 7(bl) and 7(d+) were taken by the video recording device 11. The images from FIG. 7(al to 7(d) were taken by the recording device 19. It can be viewed continuously through normal playback processing, but it can also be viewed by slow playback, frame-by-frame playback, stop, and other operations.

The golfer's swing motion can be photographed from above the golfer. In this case, the video photographing device 11 and the electrophotographic device 12 may be moved above the golfer, but the video photographing device and the electrophotographic device may be installed in front of and above the golfer, respectively. FIG. 8(al) to FIG. 8(d+) show the screen display state of the display 16 when the changes in the swing motion from address to follow-through are photographed from above the golfer. A locus indicating the movement of the center of gravity position is displayed as the image changes.The data indicating the center of gravity position is calculated by the microcomputer 15 based on the signals output from the load cells 23a to 25c of the weight distribution detection device 13. Since the state of movement of the center of gravity position forward, backward, left, and right on the horizontal plane is displayed in correspondence with changes in the swing form, it is possible to more accurately examine the state of the golfer's weight movement during the swing.

Note that the image displayed on the display 16 can be printed out by the video printer 22, and only the various measurement data stored on the floppy disk 49 can be printed out by the printer 21.

FIG. 9 shows a second embodiment of the invention.

In the figures, the same reference numerals are given to the same components as in the first embodiment.

In this embodiment, the video signal output from the video recording device 11 is sent to the video timer device 46, and within the video timer device 46, a data signal indicating a timer count number is superimposed on the video video signal to produce a video signal. The signal is sent from the timer device 46 to the superimpose processing section 50.

On the other hand, during video recording, the microcomputer 40 reads the output signals of the load cells 23c to 25c converted into digital signals by a time-sharing interrupt, calculates data representing the time course of the golfer's weight distribution, and outputs the data signal. is output to the superimpose processing section 50. Data signals are stored on the floppy disk 49 as needed. In the superimpose processing section 50, the data signal is superimposed on the video image signal, and the video image signal superimposed with the data signal is sent from the superimposition processing section 50 to the CRT display 16, and the video disk recording device 19. and stored on a video disc. Data θ indicating the storage address of each video image is simultaneously stored on the video disk.

When a detection signal is input from the magnetic sensor 32 to the I10 interface 44 during the swing, the microcomputer 40 gives priority to other processing and performs the electrophotographic apparatus shown in FIG. 10. That is, when the detection signal from the magnetic sensor 32 is input through the ■/○ interface 44 (step 71), the storage address data θ of the latest video image stored on the video disk is read from the video disk recording device 19, and the storage address data θ of the latest video image stored on the video disk is read. Data signal to RAM4
2 or the floppy disk 49 (step 72). Next, in step 73, a command signal for photographing and video signal storage is sent from the I10 interface 44 to the electrophotographic device 12. As a result, the electrophotographic device 12 photographs the golfer's swing form at the time of ball impact, converts the video information into an electrical signal, and stores the video signal in the magnetic storage device 47 built into the electrophotographic device 12. .

Data signals such as head speed, ball speed, ball launch direction, etc. measured and calculated by the swing characteristic measuring device 14 during the swing are stored on the floppy disk 49 through the I10 interface 44.
When a video signal is played back from the recording device 19, the video signal is read from the floppy disk 49 and sent from the I10 interface 44 to the superimpose processing section 50; superimposed on display 16
will be displayed.

In this embodiment, when the video disc recording device 19 performs playback processing, the microcomputer 4
0, the video recording image and the electrophotographic image are combined. Referring to FIG. 11, when the video disk recording device 19 starts playback processing, the video image signal stored on the video disk is sent to the superimpose processing section 50, and the video image signal output from the video disk is sent to the superimpose processing section 50. Storage address data is input to the I10 interface 44 (Step 7 80).

Microcomputer 40 has I10 interface 4
A comparison is made to see if the address data input from 4 matches the address data θ stored at the time of photographing (step 81). If it is different from the address data θ, steps 82 to 84 are jumped and the routine is ended. If the address data input from the video disc recording device 19 matches the address data θ stored at the time of shooting, the process advances from step 81 to step 82, and a command signal for pausing the playback operation of the video disc recording device 19 is sent. send. Next, in step 83, a command signal for outputting a video signal is sent to the electrophotographic device 12. As a result, the impact video signal stored in the storage device 47 of the electrophotographic device 12 is sent to the superimpose processing section 50. When the output of the video signal from the electrophotographic device 50 is finished, the microcomputer 4
0 sends a command signal for canceling the pause to the video disc recording device 19 (step 84), and the routine process ends. In the superimpose processing section 50, the swing characteristic measuring device 1 is applied to the video image signal and the electrophotographic image signal.
The data signal obtained from 4 is superimposed,
It is displayed on the CRT display 16.

Although the illustrated embodiments have been described above, the present invention is not limited to the embodiments described above, and various changes can be made to the constituent elements within the scope of the invention described in the claims. can.

For example, in the embodiment described above, a video photographing device is used as a photographing device for continuously photographing the golfer's swing motion, but instead of the video photographing device, an electronic photographing device is used to continuously photograph the golfer's swing motion, and , the swing form at the time of ball impact may be photographed by another electrophotographic device. Also,
As a modification of the second embodiment, the impact video signal stored in the electrophotographic device 12 is stored in the video disk recording device 19 after video recording, and the electrophotographic image signal is outputted from the video disk recording device 19 during playback. You can also do this. Images captured and stored by the electrophotographic device 12 can also be displayed independently on the CRT display 16.

Further, in the first and second embodiments, the video recording device may use a video tape storage medium. Furthermore, a sensor is provided to detect the start of the golfer's tick bank, and a detection signal from this sensor is sent to the microcomputer 40.
A command signal for resetting the count value may be sent to the timer/counter device 46 when the input signal is input to the I10 interface 44 of the timer/counter device 46, and the superimposition of the video signal and the count data may be started from that point.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a first photographing device that continuously photographs the golfer's swing motion and a second photographing device that photographs the swing form at the time of ball impact are used. By combining the video signal output from the first imaging device and the video signal output from the second imaging device, it is possible to obtain a series of composite images that represent the time course of the golfer's swing motion, thereby eliminating the need for expensive high-speed video. It is possible to provide a golf swing analysis device that does not require an I-shape device and can examine the temporal transition of swing motion including impact form in detail using inexpensive equipment.

[Brief explanation of the drawing]

1 is a perspective view of the overall configuration of a golf swing analysis device showing a first embodiment of the present invention; FIG. 2 is a plan view of a weight distribution measuring device; FIG. 3 is a perspective view of essential parts of a swing characteristic measuring device; 4 is a cross-sectional side view of essential parts of the swing characteristic measuring device, FIG. 5 is a circuit block diagram of the golf swing analysis device according to the first embodiment of the present invention, and FIG. 6 is a microcomputer according to the first embodiment of the present invention. Flowchart showing the photographed video signal synthesis processing operation of FIG. , Fig. 8 (al to Fig. 8! d) are diagrams showing the time course of the image/data display state of the CRT display when the golfer's swing motion is photographed from above, and Fig. 9 is a diagram showing the time course of the image/data display state of the CRT display when the golfer's swing motion is photographed from above. A circuit block diagram of a golf swing analysis device showing a second embodiment, FIG. 10 is a flowchart showing an electrophotographic processing operation of a microcomputer in a second embodiment of the present invention, and FIG. 11 is a circuit block diagram of a golf swing analysis device in a second embodiment of the present invention. It is a flowchart showing the playback video synthesis processing operation of the microcomputer. 11... Video shooting device (first shooting device), 12...
・Electronic photographing device (second photographing device), 13... Weight distribution measuring device, ``°°°'': 7: iGo2゛16...C 19... Video recording device, 40... - Microcomputer, 47... Magnetic disk storage device, 48... Electronic changeover switch, 50... Superimpose processing unit. Figure 1 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] 1. A first photographing device that continuously photographs the golfer's swing motion, converts it into a video signal, and outputs it; and a first photographing device that photographs the golfer's form at the time of ball impact during the swing and converts it into a video signal. and a second photographing device that outputs a video signal output from the first photographing device and a video signal output from the second photographing device to generate a series of composite images representing the temporal transition of the golfer's swing motion. A golf swing analysis device comprising a video signal processing means for displaying on a display television. 2. The first photographing device is a video photographing device, and the second photographing device is a video photographing device.
The golf swing analysis device according to claim 1, wherein the photographing device is an electrophotographic device. 3. The golf swing analysis device according to claim 1, wherein the first photographing device and the second photographing device are electrophotographic devices. 4. The video signal processing means includes a video signal synthesis processing unit that combines and outputs the video signal output from the first imaging device and the video signal output from the second imaging device, and Claim 1, characterized in that it comprises a control section that controls the timing of signal synthesis, and a video storage device that stores the composite video signal output from the video signal synthesis processing section and outputs it to a display television. 1
The golf swing analysis device described in 2. 5.Furthermore, there is a weight distribution measuring device that converts changes in weight distribution between the golfer's legs during the swing into electrical signals for each foot and outputs the same, and a weight distribution measuring device that processes the signals output from the weight distribution measuring device and calculates the changes during the swing. a data processing unit that outputs a data signal related to a temporal change in weight distribution of the golfer; and a data signal output from the data processing unit that is superimposed on a composite video signal output from the video signal synthesis processing unit to store the video. 5. The golf swing analysis device according to claim 4, further comprising a superimpose processing section for storing data in the device. 6. The video signal processing means stores the video signal output from the first photographing device and outputs it to the display television.
a video storage device, a second video storage device that stores the video signal output from the second imaging device and outputs it to the display television; and a second video storage device that stores the video signal output from the first video storage device and
The first video signal is synthesized with the video signal output from the video storage device so that a series of composite video representing the time course of the golfer's swing motion is displayed on the display television.
2. The golf swing analysis device according to claim 1, further comprising a video storage device and a control section that controls the timing of output of the video signal from the second video storage device. 7.Furthermore, there is a weight distribution measuring device that converts changes in weight distribution between the golfer's legs during the swing into electrical signals for each foot and outputs the same, and a weight distribution measuring device that processes the signals output from the weight distribution measuring device and calculates the changes during the swing. a data processing unit that outputs a data signal regarding the temporal transition of the golfer's weight distribution;
7. The golf swing analysis device according to claim 6, further comprising a superimpose processing section for storing data in a video storage device.