JPH0428612Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of the Invention] The present invention relates to a club trajectory display device for displaying the trajectory of a golf club during a shot and for correcting the shot.

[Summary of the idea]

The trajectory indicator according to the present invention has a transmission type photoelectric switch whose light emitting/receiving elements face each other and is arranged perpendicular to the shot direction and at a certain angle from the shot direction.
By detecting the point in time when the golf club passes, the trajectory of the shot can be displayed reliably. In this way, the trajectory of time will be displayed with a relatively simple structure, and you will be able to correct the shot yourself.

[Prior art and its problems]

Conventionally, as a trajectory indicator for displaying the trajectory of a golf club when shot, there is a device in which a large number of photoelectric sensors 2 and 3 are arranged perpendicularly along the axis of the shot trajectory on a rubber mat 1, as shown in FIG. Are known. This trajectory display device detects the head 4 of the golf club using photoelectric sensors 2 and 3, and displays the trajectory based on the path it passes. However, in such a conventional trajectory indicator, if the resolution of the height display is to be increased, the number of sensors will increase, and in order to bury many sensors under the mat 1, it is necessary to provide a large number of openings in the mat 1. The problem was that the structure was complicated. Further, it is preferable that such a corrective mat be a mat with grass, as shown in the sectional view in FIG. 5b, so that the player will not be burdened even if the club head 4 is directly hit against the mat. However, since grass-covered mats cannot be processed with openings, a rubber mat whose cross-sectional view is shown in FIG. 5a is used as the mat for the locus indicator. Therefore, when the club head hits the pin directly during a shot, there is a problem in that an impact may be applied to the player's hands.

[Purpose of invention]

The present invention was devised in view of the problems of conventional trajectory display devices, and has a relatively simple structure and high resolution, making it possible to practice shots without putting a burden on the driver. The purpose is to provide a trajectory indicator that can be used.

[Structure and effect of the idea]

(Structure of the invention) The present invention is a club trajectory display device that displays the trajectory of a golf club during a shot. The first and third transmission type photoelectric switches arranged as shown in FIG. A second transmission type photoelectric switch, a first time difference detection means for calculating a detection time difference between the first and third photoelectric switches, a second photoelectric switch, and one of the first and third photoelectric switches. a second time difference detection means for calculating the detection time difference with the photoelectric switch; and a data conversion means for calculating a passing trajectory parallel to the center line of the club head based on the output ratio of the first and second time difference detection means. The present invention is characterized by comprising display means for displaying the passing locus detected by the data conversion means.

(Function) According to the present invention having such features, three transmission type photoelectric switches are arranged along the center line of the locus in the vertical direction and at a certain angle from the center direction. Therefore, as the golf club passes, the photoelectric switches are sequentially blocked from light. The speed at the tip of the golf club can be detected, and since the shading time differs depending on the passing position, the trajectory of the golf club can be detected based on the shading time.

(Effects of the Invention) Therefore, in the present invention, the trajectory of the golf club can be displayed with a relatively simple configuration regardless of the speed of the golf club. Furthermore, since the light emitting/receiving element of the photoelectric switch is arranged at the end of the pine, there is no need to provide an opening in the pine itself and bury the sensor therein, and the pine with grass can be used as is.

[Explanation of Examples]

FIG. 1 is a schematic diagram showing the structure of a club trajectory indicator according to an embodiment of the present invention, and FIG. 2 is a block diagram showing its electrical configuration. In these figures, a first photoelectric switch 6 consisting of a light emitter 6T and a light receiver 6R is placed vertically on the pine 5 with grass along the central axis of the pine, and a light emitter is placed at an angle of 45° from the central axis, for example. 7T and a light receiving section 7R, and a third photoelectric switch 8 consisting of a light projecting section 8T and a light receiving section 8R at a position perpendicular to the central axis.
is installed. Each photoelectric switch 6-8
shows the club head 4 when shooting a golf ball 10 fixed on a tee pin 9 on a mat.
It is configured to detect a signal when the light is blocked by the passage of the light.

Now, in the trajectory display of this embodiment, as shown in FIG.
15 and 16. Waveform shaping circuit 14-1
6 emits a pulse signal based on the falling output when the optical signal is cut off in each of the light receiving sections 6R to 8R, and the output of the waveform shaping circuit 14 is RS.
The output of the waveform shaping circuit 15 is connected to the set input terminal of the flip-flop 17.
The output of the waveform shaping circuit 16 is input to the set input terminal of
They are connected to the reset input terminals of RS flip-flops 17 and 18, respectively. RS flip-flop 1
7 and 18, respectively, while the photoelectric switches 6 and 8 and the club head 5 between the photoelectric switches 7 and 8 pass,
A gate circuit 19,
Give 20. A clock signal from a clock generator 21 is applied to the other input terminals of the gate circuits 19 and 20, and the clock signal is applied to the counters 22 and 23 only for the gate opening time.
The counters 22 and 23 calculate the time passing between the photoelectric switches 6 and 8 and between the photoelectric switches 7 and 8 by counting the clock signal.
Its output is given to a data conversion circuit 24. The data conversion circuit 24 also includes a waveform shaping circuit 16.
The output of is given. The data conversion circuit 24 is a data conversion means that calculates the trajectory of the club head 4 based on the output from the ratio of the counters 22 and 23, and provides the output to the display 25. The display device 25 displays the trajectory of the club head 4 based on the data conversion output, and for example, displays the trajectory divided into two parts, that is, five parts, at the center, outside and inside the center, respectively, using a light emitting diode or the like. be.

(Operation of this embodiment) FIG. 3 is a diagram showing the relationship between the photoelectric switch and the trajectory of the club head. As shown in FIG. 3, the trajectory la of the club head 4 inside the center line 26, the trajectory lb coinciding with the center line 26, the trajectory lc when the club head 4 passes outside the center axis, and the passing time are shown. In this figure, the photoelectric switch 7 is arranged diagonally with respect to the center line 26, so the transit times t _1a , t _1b , t _1c between the photoelectric switches 7 and 8 depend on the trajectory of the club head 4 as shown in the figure. . This time also varies depending on the speed of the club head 4 itself. Therefore, in the present invention, the passage time of the photoelectric switch 6 and the photoelectric switch 8 corresponding to the speed of the club head 4 itself is
t _2a to _{t 2c} are detected, and the trajectory of the club head 4 is detected based on the ratio of this transit time to the transit time between the photoelectric switches 7 and 8.

For example, the ratio of the transit time when passing through the trajectory la is
If la1=t _1a /t _2a , the ratio of the transit time when passing through the trajectory lb is lb1=t _1b /t _2b , and the ratio of the transit time when passing through the trajectory lc is lc1=t _1c /t _2c , then la1＜lb1＜
It becomes lc1.

Therefore, in the above-described block diagram, when a player shoots the golf ball 10 on the tee peg 9, the light from the photoelectric switches 6 to 8 is blocked by the speed and trajectory of the club, and the light from the flip-flop 1 is blocked.
7 and 18 operate for a predetermined time. Therefore counter 2
2 and 23, the transit time between the photoelectric switches 6 and 8 and between the photoelectric switches 7 and 8 is calculated. After passing through the photoelectric switch 8, a conversion start signal is given to the data conversion circuit 24. Data conversion circuit 24
By calculating this ratio, the trajectory of the golf club can be calculated regardless of the speed of the club head 4. The locus thus determined is displayed on the display 25 in five stages.

As described above, according to the present invention, a club trajectory indicator can be constructed simply by attaching a photoelectric switch around the mat and signal processing its output without performing any processing on the mat itself. Therefore, it is possible to obtain a high-resolution display with a relatively simple structure, and it is also possible to use mats with grass or various types of mats.

In this embodiment, in order to detect the trajectory of the club head, the photoelectric switches 6 and 8 and the passage time of the photoelectric switches 7 and 8 are detected, respectively. The trajectory can also be calculated by detecting time.

Furthermore, in this embodiment, the trajectory of the club head is displayed in five stages based on the output of the data conversion circuit.
It goes without saying that the configuration can be configured to display even more detailed trajectories.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the use of a club track indicator according to one embodiment of the present invention, FIG. 2 is a block diagram showing its electrical configuration, FIG. 3 is a diagram showing the positional relationship between the club track and a photoelectric switch, FIG. 4 is a schematic diagram showing a conventional club track indicator, and FIG.
FIG. 5b is a partial cross-sectional view of a mat with grass. 5: Grass mat; 6, 7, 8: Photoelectric switch; 6R, 7R, 8R: Light receiving unit; 14-16:
...wave shaping circuit, 17, 18...flip-flop, 21...clock generator, 22, 23...
Counter, 24...data conversion circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] A club trajectory display device that displays the trajectory of a golf club during a shot, the light emitting and receiving portions facing each other across the center line of the pin,
first and third transmission type photoelectric switches arranged to have optical axes perpendicular to the center line, and a light emitting/receiving part facing each other across the center line of the mat;
a second transmissive photoelectric switch arranged to have an optical axis inclined at a predetermined angle from the center line; and a first time difference detection means for calculating a detection time difference between the first and third photoelectric switches. , a second time difference detection means for calculating a detection time difference between the second photoelectric switch and one of the first and third photoelectric switches; and the first and second time difference detection means. A club characterized by comprising: data converting means for calculating a passing locus parallel to the center line of the club head according to an output ratio of the data converting means; and display means for displaying the passing locus detected by the data converting means. Trajectory indicator.