1. Field of the Invention
The present invention relates to the identification of spherical objects and in particular to the identification of coded golf balls in a golf game or a golf driving range as disclosed in WO 99/48046.
2. Description of the Related Art
A problem in detecting a spherical object (such as a golf ball) when it is stationary or moving in a straight line, is that the orientation of a transponder within the object may be such that it is not detected by a sensing antenna. Moreover, in automated golf driving ranges as disclosed in WO 99/48046, stopping a ball for code-reading purposes introduces unnecessary delay.
Accordingly the present invention seeks to provide an arrangement for reading a coded object while it is moving.
When moving golf balls around an automated golf driving range, they can accumulate upstream of reading devices. This can cause jamming. In addition, certain code-reading technologies are incapable of discriminating between two balls if they are too close.
Accordingly the present invention also seeks to overcome or reduce this problem.
In accordance with a first aspect of the present invention, there is provided a device for recording the code of a coded spherical object as it is moving comprising a sensing member and a path for conveying objects through or past the member, the means defining the path including a helical track along which the objects are constrained to move.
As the objects move along the track they rotate about different axes in space, so that, whatever their initial orientation, their code can be read by the sensing member, i.e. there can be no blind spots undetected by the sensing member.
As the objects move along the track they rotate about different axes in space, so that, whatever their initial orientation, their code can be read by the sensing member, i.e. there can be no blind spots undetected by the sensing member.
The code is preferably stored in an r.f. identification tag contained within a golf ball. The balls may be as disclosed in PCT/GB00/02461. In this case the sensing member is an antenna, which may have coils passing around and/or along the helical track.
The helical track is preferably arranged on the inside surface of a hollow cylindrical or frusto-conical member.
The helical track may be part of a driven member operated by an electric motor. The driven member may extend horizontally, in which case the inlet of the helical track can be configured to admit only one ball at a time. Means, such as a leaf spring, can be provided to engage inserted balls such that a following ball cannot enter the track immediately after an initial ball, nor can the following ball cause jamming.
Alternatively the axis of the helical track may be arranged vertically in which case the balls can move under the effect of gravity. This arrangement is particular suitable for coding technologies which can operate even with touching balls. Of course, a ball separation device may be provided upstream of the helical track if required.
According to a second aspect of the present invention, there is provided a method of ensuring that the code of a coded spherical object can be read by a sensing member comprising moving the object along a helical track and at the same time through or past the sensing member.
The helical track produces the desired rotational movement of the spherical object.
Preferred embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings of which:
Referring to the drawings,
In use, a golf ball (not shown in
An advantage of the above arrangement is that is prevents balls passing the code reading antenna without having their code read. In addition there is no need to stop the ball to have its code read. Any debris entering the inlet 25 passes straight through the device without jamming or damaging it. An advantage of the horizontal arrangement in underground locations, is that it minimises the depth of excavation needed to accommodate it.
Various modifications may be made to the above-described embodiment. For example, the axis of the screw may be arranged vertically.
The antenna coils may extend cylindrically around the axis of the helical screw or they may extend longitudinally along only part of the circumference thereof.
Another advantage of this arrangement is that it separates successive golf balls such as 41 and 42 in the conveying path. This is necessary for certain coding technologies, which are unable to reliably discriminate between immediately adjacent balls.
The antenna can be arranged inside core 62 if desired.
The second and third embodiments are suitable for coding technologies which can discriminate between immediately-adjacent golf balls. However, if desired a ball separating device may be provided upstream to maintain a desired minimum distance between successive balls.
Referring now to
Surrounding the exit of the housing 81 at the bottom is an antenna coil 85 for reading the code on a passing ball.
An advantage of the fourth embodiment is that it is generally compact and occupies less space than the third embodiment. In addition, the coded ball being read is enclosed within a housing and thus protected from external influences. An advantage of placing the detection coil at a spacing from the entrance to the housing is that, by the time the ball reaches the coil, it is undergoing a steady rotation with no tendency to slide.
In modifications, the housing 81 may be inclined to the vertical. It may also be oriented horizontally or near horizontally provided that there are means for assisting in moving the ball down the device, e.g. a blower for producing a moving air stream. The dimensions and materials may be changed as desired.
Referring now to
A housing 95 for circuitry associated with the ball identification device is attached to the locking ring 93 by means of a clip connection. Housing 95 has connectors 96 for enabling electrical connections to be made to printed circuit boards within housing 95. In use, the exit end 97 of the housing 91 is arranged below the ball-receiving end so that balls descend through the housing under the effects of gravity. The antenna coil 98 is arranged upstream of the exit end 97. Alternatively the antenna coil can be located within housing 95.
The features and modifications of the various embodiments described may be combined or interchanged as desired.
The above-described ball identification devices can be used with other types of code-reading. For example bar codes or other optical codes can be detected by an optical reader arranged inside the housing of the device. An external reader can be used when the housing is transparent. The articles identified may be any other objects which roll. The articles need not be coded in which case the reader simply detects their presence.
Number | Date | Country | Kind |
---|---|---|---|
0028102.2 | Nov 2000 | GB | national |
0112968.3 | May 2001 | GB | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/GB01/05097 | 11/19/2001 | WO | 00 | 9/16/2003 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO02/41240 | 5/23/2002 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
5722543 | Jarmuzewski | Mar 1998 | A |
6607123 | Jollifee et al. | Aug 2003 | B1 |
6685575 | Anderson | Feb 2004 | B1 |
Number | Date | Country |
---|---|---|
11137758 | May 1999 | JP |
2000229140 | Aug 2000 | JP |
WO 9617657 | Jun 1996 | WO |
WO 9948046 | Sep 1999 | WO |
Number | Date | Country | |
---|---|---|---|
20040048686 A1 | Mar 2004 | US |