JP2656128B2 - Imaging device and face angle measuring device for golf club - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to an imaging apparatus for imaging a movement of a moving object when passing through a predetermined area, and particularly to an imaging apparatus for a golf club which is optimal for golf practice.

[Prior art]

Conventionally, in order to enhance the effect of golf practice, imaging of a golf club before and after hitting a ball has been performed. The imaging method involves firing a strobe light source at a fixed time interval from directly above the golf club head, optically or photoelectrically instantaneously capturing an image, and obtaining a plurality of still images within the field of view of the camera. It is.

[Problems to be solved by the invention]

In the conventional technique described above, in order to properly arrange a plurality of still images that the golf club can see within the field of view of the camera so as not to be too far apart or too close to each other, it is necessary to use a strobe light source. Adjustment of the arc interval is troublesome and time-consuming. Note that proper placement of each still image is an important factor for accurate imaging of a face angle. SUMMARY OF THE INVENTION An object of the present invention is to provide a golf club imaging apparatus that solves the above-mentioned problems of the prior art and has a proper firing interval of a strobe light source to accurately image a golf club before and after hitting. is there.

[Means for Solving the Problems]

In order to solve this problem, an imaging device according to a first aspect of the present invention is a device for imaging a movement of a moving object when passing through a predetermined region, wherein a moving speed of the moving object at a preceding stage of the predetermined region is detected. A sensor, based on an output of the sensor, a calculating unit for calculating a passing time and a firing time interval of the moving object passing through the predetermined area; and a calculating unit of the moving object at the passing time and the firing time interval. A strobe light source that is fired at least twice when passing through a predetermined area; and a light source camera that captures an image of the moving object in a direction perpendicular to the moving direction by each firing of the strobe light source.

[Action]

In the imaging device according to the present invention, the strobe light source is determined based on the moving speed of the moving object detected by the sensor at a position before the predetermined area. At a passing time of the moving object and a time interval of the ignition, the moving object is fired at least twice when the moving object passes through a predetermined area.
An image is taken by a photoelectric camera from a direction perpendicular to the moving direction.

【Example】

Embodiments according to the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a combination of the embodiments. In FIG. 1, reference numeral 1 denotes a golf ball (hereinafter simply referred to as a ball), and reference numerals 2 and 12 denote golf clubs (hereinafter simply referred to as clubs) which are also moving objects in the first invention.
2 is a wood club and 12 is an iron club. Reference numerals 3A and 3B denote optical sensors, and a set of the optical sensors 3A and 3B is used to determine the time during which the club 2 passes immediately before hitting, and the speed immediately before hitting the club 2 is calculated from the passing time. Each of the optical sensors 3A and 3B is of a light transmission type including a light emitting unit and a light receiving unit, but may be of a light reflection type based on reflection from a club. 4A is a photoelectric camera (hereinafter simply referred to as a camera).
The camera 4A has the ball 1 and the club 2 or the club 12
Are imaged so that the still images at each predetermined time point are multiplexed from immediately above. The strobe firing described below functions for capturing the still image. Reference numeral 6 denotes a strobe power source, and reference numeral 7 denotes a strobe light source. The firing of the strobe light source 7 is performed by activation of the strobe power source 6 according to a command from the control / calculation unit 5. The control / arithmetic unit 5 determines the time of the first issuance of the start command, the subsequent time interval, that is, the firing interval, and the number of times of firing, by using the signals from the optical sensors 3A and 3B, , 12, and the speed at that time. In other words, if the speed of each of the clubs 2 and 12 immediately before hitting is high, the firing interval can be narrowed and the positional relationship between the still images can be determined so as to be suitable for calculating the face angle of the club. This will be described below. Reference numeral 8 denotes a frame memory for storing data of still images captured by at least two firings in a predetermined period immediately after the impact. The data of the still image will be described later in detail. Further, the control / calculation unit 5 takes in the data from the frame memory 8 and calculates the face angle of the club based on the data. The details of this calculation will be described later. Reference numeral 9 denotes a display, which displays a calculation result from the control / calculation unit 5, that is, a face angle of the club in a numerical value. The operation of this embodiment will be described with reference to the following examples of captured images. FIG. 2 is a view showing an example of an image taken directly above the head of a wood club, and FIG. 3 is a view showing an example of an image taken immediately above the head of an iron club. The head is provided with a mark representing a straight line, for example, a linear mark, or two or more dot marks on the straight line, in parallel with the intersection line between the face oriented with respect to the ball on the horizontal plane and the horizontal plane. , On the face or on the upper surface adjacent to it. The face angle is defined as the angle between the mark and the direction perpendicular to the intended flight line when the ball is viewed from directly above. Specifically, in FIG. 2, a line mark 10 indicated by oblique hatching is attached to the face 2b of the head 2a of the club 2 as a wood club and the upper surface side adjacent to the ridge line portion with the upper surface. The angle θ between the dashed line perpendicular to the intended flight line U of the ball 1 and the mark 10 is the face angle in this case. In the case of the club 12 as an iron club in FIG. 3, three dot marks 20 on a straight line indicated by a dashed line are marked on the face 12b of the head 12a. In other words, the three dot marks 20 are connected to represent one straight line. The angle θ formed by this straight line and a broken line perpendicular to the intended flying ball line U is the face angle in this case. Now, for the sake of simplicity, it is assumed that the first firing is performed immediately before the hit and the second firing is performed immediately after the hit, and that the firing is only two times. Each value of the face angle θ before and after the impact or a change value of the face angle before and after the impact is obtained based on the double still image captured by each ignition. In the above description, for the sake of convenience, the firing of the strobe light source is performed once each immediately before and immediately after the impact. However, the firing is not limited to this, and generally it is sufficient to fire one or more times immediately before and immediately after the impact. If the number of firings before and after the hit is one or more, the face angle can be measured in detail at as many points. Of course, the number should be determined according to need. The speed of the club is determined based on the detection of the optical sensors 3A and 3B in FIG. 1, and the time of impact of the club is calculated from this speed. The time interval between the first and second firings is determined based on the speed immediately before the club is hit. The reason for this is that a predetermined number of still images relating to the club are captured in the field of view of the camera 4A, and the still images are properly arranged. Of course, the first time point and the time interval of the ignition are related to the predetermined number of still images.

【The invention's effect】

As described above, in the present invention, the strobe light source is fired at least twice at a time interval when the moving object passes through the predetermined point, and each of the firings causes the moving object to move in a direction perpendicular to the moving direction. An image is taken by a photoelectric camera. Therefore, the number of still images related to the moving object required for accurately obtaining the movement at the time of passing the predetermined point in the field of view of the photoelectric camera can be captured in a form that is appropriately arranged. Also, based on the data related to the direction of the sign from the video signal of the photoelectric camera when the head of the golf club is instantaneously imaged from directly above, the face angle of the golf club is changed by the arithmetic unit to the golf ball. Is calculated as the angle formed by the sign and the direction perpendicular to the intended flight line when viewed from directly above, so that the face angle of the golf club before and after the hit is accurately measured, Bad habits and tendencies can be easily corrected, and golf practice can be streamlined.

[Brief description of the drawings]

FIG. 1 is a structural view of an embodiment according to the present invention, FIG. 2 is an exemplary view of an image taken from directly above a head of a wood club, and FIG. 3 is a view taken from directly above a head of an iron club. FIG. 3 is a view showing an example of the image. Description of symbols 1: Ball, 2, 12: Club, 2a, 12a: Head, 2b, 12b: Face, 3A, 3B: Optical sensor, 4A: Camera, 5: Control / calculation unit, 6: Strobe power supply, 7: Strobe Light source, 8: frame memory, 9: display, 10, 20: mark.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukio Koga 1 Fuji-cho Control Co., Ltd., Fuji-cho, Hino-shi, Tokyo (72) Inventor Yoshiyuki Fukushima 1 Fuji-cho Control Co., Ltd. 1 Fuji-cho, Hino-shi, Tokyo (56) References JP-A-63-186672 (JP, A) JP-B-45-9024 (JP, B1)

Claims (1)

(57) [Claims] 1. An apparatus for imaging a movement of a moving object when passing through a predetermined area, a sensor for detecting a moving speed of the moving object at a preceding stage of the predetermined area; A calculating unit for calculating a transit time and a firing time interval through the predetermined area; and a strobe light source that is fired at least twice when the moving object passes through the predetermined area at the transit time and the firing time interval. And an image pickup means for picking up an image of the moving object in a direction perpendicular to the moving direction by each firing of the strobe light source.