JPH03198876A - Measuring instrument of lie and loft angles of golf club head - Google Patents

Abstract

PURPOSE:To improve the measuring accuracy and provide ease of fast measuring by a method wherein an auxiliary measuring plate, on which a lot of parallel measuring lines are engraved, is attached on a shaft, the auxiliary measuring plate and the groove face of a head are projected by CCD cameras, and a computer performs an arithmetic process to detect the lie and loft angles. CONSTITUTION:An auxiliary measuring plate P is a flat plate on which a lot of parallel measuring lines are engraved at regular distances, and attached on a shaft of a golf club to be detected or on the neck of the shaft. The golf club is set on a measuring table 1 so that the groove face H1 of the golf club can be seen through a window 2 and the auxiliary measuring plate P through a window 3. Then, while lit up by illuminating lamps 4 and 5, the groove face H1 and the auxiliary measuring plate P are projected by a CCD cameras 6 and 7. The image signals of the CCD cameras 6 and 7 are input to a computer 8 through an input substrate 9, and then output to a printer 10 or a display 11 after processed by an arithmetic circuit. Thereby, the lie and loft angles are simultaneously measured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for simultaneously measuring the lie and loft angles of golf clubs, particularly iron heads.

[Conventional technology]

Conventionally, the lie and loft angles of iron heads in golf clubs have been measured by placing a special measuring ruler at a predetermined position on the iron head, reading the scale, and measuring the lie angle and loft angle individually.

[Problem to be solved by the invention]

Therefore, this contact measurement method has large measurement errors, lacks accuracy, and is inefficient.

An object of the present invention is to measure both lie and loft angles simultaneously and with high accuracy in a non-contact manner.

[Means to solve the problem]

In order to achieve the above object, the present invention fixes to the shaft of a golf club a measurement auxiliary plate having measurement lines of 11t2 arranged at equal intervals parallel to the axis of the shaft, and the groove surface of this auxiliary plate and the club head. An illuminator and a CCD camera are installed in the measurement table with a window hole drilled so that the window can be seen.The measurement line and groove line of the groove surface and auxiliary plate are captured by the CCI) camera, and this is calculated by a computer to determine the club. The gist is that the lie angle and loft angle of the head are measured.

〔Example〕

Hereinafter, the golf club head lie loft angle measuring device (n) of the present invention will be explained based on the illustrated embodiment.

In general, the iron head of a golf club has a radius of 100 degrees to the iron at the connection part with the shaft, as shown in Figure 3.
(The angle formed by the groove on the full surface is defined as the groove angle θl, and the shaft S
When the angle formed by the axis of is the shaft angle θS, the lie angle θL1
and loft angle θI.

2 is related to the 6-layer groove angle and the shaft angle θS.

This is shown by the following equation.

θL1=f(θ−・θS) θI, 22g (θ−・θS) However, it is difficult to directly measure the lie angle and loft angle of a club head having an aN structure.

Therefore, if the groove angle and shaft angle are known from the above formula, the lie angle and loft angle can be determined by calculation.

In the present invention, light is irradiated onto a club head fixed under certain conditions by a measuring device, the groove angle and shaft angle are checked using a CCD camera, and the lie angle and loft angle are calculated by a computer. .

In the figure, reference numeral 1 denotes a measuring table having the required size. This measuring table 1 is box-shaped, and allows a golf club to be placed on the top. Window holes 2 and 3 for projecting the image of the measurement auxiliary plate attached to the table are bored on one side of the measuring table and on the m side, respectively.

Inside the measurement table 1, an illuminator 4.5 and a CCD camera 6.7 are provided which illuminate the groove surface H1 of the club head and the measurement auxiliary plate P outside the measurement table through the respective window holes 2 and 3. Therefore, the groove surface J (I) of the club head H seen through the window hole 2 is illuminated by the illuminator 4, and this full surface is reflected by the CCD camera 6.
Illumination f! of the surface of the measurement method P seen through the window hole 3! 5, and this auxiliary board is imaged by CCI) camera 7. This CCD
A CCD camera video input board 9 built into the computer 8 is connected to the camera 6.7.

Note that the computer 8 has a printer 10. Of course, a display 11 and a keyboard 12 are connected.

The measurement auxiliary plate P has a flat plate shape, and has a large number of parallel measurement lines engraved at predetermined equal intervals on the surface thereof, and a shaft S on the back surface where the measurement lines and the shaft axis are 'IN' T. In this way, two shaft fixing tools P2 for holding the shaft are arranged.

To measure the lie angle and loft angle of a golf club using the measuring device configured as described above, first attach a measurement auxiliary plate to the measurement auxiliary shaft temporarily supported on the shaft or shaft attachment part of the golf club being tested. Fix P. and,
This golf club is placed so that the groove surface H1 is in the window hole 2, and the measurement auxiliary plate P
The specimens are placed on the measuring table 1''2 so that they can be seen through the window holes 3, respectively. Then, the groove surface TII measurement auxiliary plate P surface is illuminated with an illuminator 4.5 and imaged with a CCD camera 6.7. The video signal from the CCD camera 6.7 is inputted to the computer 8 via the input board 9, where it is calculated by an arithmetic circuit, and output to the printer 10 or the display II, or simultaneously.

This allows the lie angle and loft angle to be measured simultaneously.

It is also possible to measure the lie angle and loft angle with two CCD cameras 16. In this case, one CCD camera 16 and an illuminator are installed in the N4 area, and this
The CD camera 16 faces the window hole 2 and directly targets the club head I.
(and a reversible mirror 17 in front of this window hole 2, that is, between the window hole 2 and the CCD camera 16)
is provided, and the positions of the window holes 2, 3 and the mirror 17 are determined so that the window hole 3 is reflected by this mirror when the mirror 17 is reversed.

〔Effect of the invention〕

According to the present invention, a measurement auxiliary plate with many parallel measurement lines parallel to the axis of the shaft is attached to the shaft, the entire surface of this auxiliary plate and the head is imaged by a CCI camera, and this is recorded by a computer. Since the lie angle and loft angle are measured by calculation, there are advantages such as high measurement accuracy, easy measurement, and fast measurement speed.

[Brief explanation of drawings]

The drawings show one embodiment of the measuring device of the present invention, and FIG. 1 is an explanatory view of the entire structure, FIG. 2 is an explanatory view of the outside of the measuring table, FIG. FIG. 1 is a measurement stand, 2 and 3 are window holes, 4 and 5 are illuminators, (3, 7
, 1+3 is a CCD camera, 8 is a computer, and 17 is a reversing mirror.

Claims (1)

[Claims] (1) A measurement auxiliary plate with measurement lines engraved at equal intervals parallel to the axis of the shaft is fixed to the shaft of the golf club, and a window is opened so that the groove surface of the auxiliary plate and the club head can be seen. An illuminator and a CCD camera are installed in a measurement table with a hole drilled in the groove, and the measurement line and groove line of the groove surface and auxiliary plate are captured by the CCD camera, and this is calculated by a computer to determine the lie angle and loft angle of the club head. A lie loft angle measuring device for a golf club head, characterized in that it measures the lie loft angle of a golf club head.