WO1998001721B1 - Apparatus and method for tire condition assessment - Google Patents
Apparatus and method for tire condition assessmentInfo
- Publication number
- WO1998001721B1 WO1998001721B1 PCT/IB1997/001100 IB9701100W WO9801721B1 WO 1998001721 B1 WO1998001721 B1 WO 1998001721B1 IB 9701100 W IB9701100 W IB 9701100W WO 9801721 B1 WO9801721 B1 WO 9801721B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tire
- radiation
- reflected
- vehicle
- analysis function
- Prior art date
Links
- 238000004458 analytical method Methods 0.000 claims abstract 14
- 238000006073 displacement reaction Methods 0.000 claims abstract 5
- 230000002093 peripheral Effects 0.000 claims 4
- 230000000694 effects Effects 0.000 claims 2
- 238000010191 image analysis Methods 0.000 claims 2
- 230000000875 corresponding Effects 0.000 claims 1
- 230000001419 dependent Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000000295 complement Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000003287 optical Effects 0.000 abstract 1
Abstract
Method and apparatus for automotive tire condition and other article assessment is based upon radiation analysis of a rotated tire. Analysis of reflected radition on the basis of intensity sensing provides a measure of tread depth and sidewall profile, together with tread location and other data. By positional analysis of the tread depth locations there is provided complementary information on the tread wear pattern. Sidewall profile determination enables identification of other tire condition factors. Tread depth and sidewall profile are also determined by laser or other radiation line image displacement techniques and a mounting system is provided for the apparatus enabling determinations to be made without the use of a roller bed. Proper positional alignment of the wheel to the apparatus is determined by means of a reference datum derived from reflected radiation within the apparatus. Proper defined proximity of the tire is defined by a pair of alignment bars positioned over an optical window of the apparatus.
Claims
AMENDED CLAIMS
[received by the International Bureau on 5 February 1998 (05.02.98); original claims 8 and 25 cancelled; original claims 1, 15, 26-29 amended; new claim 31 added; remaining claims unchanged (8 pages)]
1. A method of tire condition assessment comprising the steps of
(a) mounting a tire to be tested for rotation;
(b) directing incident radiation onto two or more peripherally spaced locations on the tire;
(c) detecting radiation reflected from each of the locations on the tire;
(d) processing the detected radiation to provide a radiation analysis function including information relative to a profile of the tire; and
(e) determining at least one characteristic of the condition of the tire by reference to its profile.
2. A method according to claim 1, and further comprising the step of performing an image analysis function in relation to the reflected radiation.
3. A method according to claim 1, and further comprising the step of effecting an intensity analysis function in relation to the reflected radiation.
4. A method according to claim 1, wherein the radiation is laser radiation, and the radiation analysis function includes the step of effecting an image displacement analysis function in relation to the reflected radiation.
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5. A method according to claim 1, wherein the determining step includes obtaining a measure of tread location and/or depth with respect to tire.
6. A method according to claim 1 , wherein the mounting step includes mounting the tire while the tire remains mounted on a vehicle by supporting the tire and at least a portion of the vehicle weight on associated roller means at a defined positional relationship with respect to the radiation directing and detection locations .
7. A method according to claim 1, wherein the directing step includes applying the radiation as a band or stripe or line to the tire across at least a portion of the lateral width of the tire and in an incident direction inclined with respect to a radius to the tire at a given peripheral location on the tire; and the detecting step includes receiving radiation from at least said portion of the lateral width of the tire, thereby to enable providing in the processing step a measure of tread depth at said peripheral location on the tire, on the basis of image displacement or offset by the tread depth.
9. A method according to claim 1, wherein the mounting step includes mounting a radiation source and a radiation detector adjacent the tire by supporting same from the structure of a vehicle on which the tire is mounted, the
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processing and determining steps being carried out during movement of the vehicle or after such movement.
10. The method of claim 1, including the step of employing, as a reference base for positional analysis of the tire with respect to apparatus providing the radiation, a reflected portion of the incident radiation reflected from a surface of known attitude with respect to the apparatus .
11. A method according to claim 10, wherein said surface of known attitude is on a window of the apparatus, the method including using as said reflected portion of said incident energy an internally reflected portion thereof.
12. A method according to claim 11, including providing abutment means for abutting engagement with a tire to be tested, and causing abutment between said tire and the abutment means in order to define a predetermined proximity of the tire with respect to the apparatus .
13. A method according to claim 12, including positioning the abutment means between the window through which said incident energy proceeds and the tire.
14. A method of making diagnostic and/or maintenance determinations of tire or wheel data on an automotive vehicle wheel without removing same from the vehicle, the method
comprising the step of:
(a) removably mounting diagnostic and/or maintenance apparatus on the vehicle by means of disenagageable mounting means adapted to mount the apparatus at a position adjacent the wheel;
(b) rotating the wheel; and
(c) making diagnostic and/or maintenance determinations with the apparatus either during or after rotation of the wheel.
15. Apparatus for tire condition assessment comprising:
(a) mounting means for rotatably supporting a tire to be tested;
(b) a radiation source located for directing incident radiation onto two or more peripherally spaced locations on the tire to be tested;
(c) a radiation detector located for detecting radiation reflected from each of the locations on the tire; and
(d) a signal processor connected to said radiation detector and adapted to provide a radiation analysis function including information relative to a profile of the tire in relation to reflected radiation detected by said detector;
(e) said signal processor including means adapted to determine at least one characteristic of the condition of the tire by reference to its profile.
16. Apparatus according to claim 15,. herein said signal
37
processor includes means to perform an image analysis function in relation to the reflected radiation.
17. Apparatus according to claim 15, wherein said signal processor includes means to effect an intensity analysis function in relation to he reflected radiation.
18. Apparatus according to claim 15, wherein said radiation source includes a laser source, and said signal processor includes means to effect an image displacement analysis function in relation to the reflected radiation.
19. Apparatus according to claim 15, wherein said signal processor includes means to determine a measure of the tread depth of the tire.
20. Apparatus according to claim 15, wherein said mounting means includes roller means adapted to support at least one vehicle wheel with the tire to be tested located on said at least one vehicle wheel without demounting thereof, said roller means being located in a definable positional relationship with respect to said radiation source and said radiation detector.
21. Apparatus according to claim 20, wherein said mounting means includes a drive and drive control means for rotating the tire to be tested, said signal processor
38
including means to coordinate said analysis function with the rate of rotation of the tire by said drive.
22. Apparatus according to claim 15, wherein said radiation source includes means to apply the incident radiation as a band or stripe or line to the tire across at least a portion of the lateral width of the tire and in an incident direction inclined to a radius to the tire at a peripheral location on the tire; and said radiation detector includes means to receive radiation from at least said portion of the lateral width of the tire, said signal processor including means to provide a measure of tread depth at said peripheral location on the basis of image displacement or offset by the tread depth.
23. Apparatus according to claim 22, wherein said signal processor includes means to develop a profile of the tire from tread determinations at a plurality of locations.
24. Apparatus according to claim 15, and further comprising support means to support said radiation source and said radiation detector from structure of a vehicle on which the tire is mounted.
26. Apparatus according to claim 31, wherein said surface of known attitude includes a window and said reflected portion of said radiation is an internally reflected portion
39
40
thereof .
27. Apparatus according to claim 31, and further comprising abutment means engageable with the tire to enable a defined proximity to be established between said apparatus and the tire.
28. Apparatus according to claim 31, and further comprising means supporting said abutment means in use between said window and the tire.
29. Apparatus according to claim 31, wherein said abutment means includes a pair of alignment bars disposed over said window for simultaneous abutting engagement with the tire in use.
30. Apparatus for making diagnostic and/or maintenance determinations of tire and/or wheel data on an automotive vehicle wheel without removing same from the vehicle, comprising: diagnostic and/or maintenance mechanism and support means removably mounting said diagnostic and/or maintenance mechanism on the vehicle at a location adjacent the wheel.
31. Apparatus for tire condition assessment comprising: (a) mounting means for rotatably supporting a tire to be tested;
40
41
(b) a radiation source located for directing incident radiation onto the tire to be tested;
(c) a radiation detector located for detecting radiation reflected from the tire;
(d) reflection means providing a reflection surface of known attitude with respect to the apparatus for reflecting a portion of said incident radiation for use as a reference base for positional analysis of the tire; and
(e) a signal processor connected to said radiation detector and adapted to provide a radiation analysis function including information relative to a profile of the tire in relation to reflected radiation detected by said detector;
(f) said signal processor including means adapted to determine at least one characteristic of the condition of the tire by reference to its profile.
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STATEMENT UNDER ARTICLE 19
Each of claims 1 and 15 has been amended to incorporate therein the subject matter of previous claim 8 which has been cancelled. New claim 31 is an independent claim corresponding to previous dependent claim 25, which has been cancelled. Claims 26 to 29 have been amended to change the dependencies thereof from claim 25 to claim 31.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50499698A JP3464678B2 (en) | 1996-07-04 | 1997-07-03 | Apparatus and method for evaluating tire condition |
Applications Claiming Priority (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9614025.6A GB9614025D0 (en) | 1996-07-04 | 1996-07-04 | Tyre tread assessment |
| GB9614025.6 | 1996-07-04 | ||
| GBGB9614591.7A GB9614591D0 (en) | 1996-07-11 | 1996-07-11 | Tyre tread assessment |
| GB9614591.7 | 1996-07-11 | ||
| GB9618397.5 | 1996-09-04 | ||
| GBGB9618397.5A GB9618397D0 (en) | 1996-09-04 | 1996-09-04 | tyre tread assessment |
| GBGB9624309.2A GB9624309D0 (en) | 1996-11-22 | 1996-11-22 | Tyre tread assessment |
| GB9624309.2 | 1996-11-22 | ||
| GBGB9708779.5A GB9708779D0 (en) | 1996-07-04 | 1997-05-01 | Tyre tread assessment |
| GB9708779.5 | 1997-05-01 | ||
| GB9709841A GB2314928B (en) | 1996-07-04 | 1997-05-16 | Tyre condition assessment |
| GB9709841.2 | 1997-05-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1998001721A1 WO1998001721A1 (en) | 1998-01-15 |
| WO1998001721B1 true WO1998001721B1 (en) | 1998-04-09 |
Family
ID=27547263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB1997/001100 WO1998001721A1 (en) | 1996-07-04 | 1997-07-03 | Apparatus and method for tire condition assessment |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6069966A (en) |
| EP (1) | EP0816799A3 (en) |
| JP (1) | JP3464678B2 (en) |
| KR (1) | KR20000023566A (en) |
| CN (1) | CN1227629A (en) |
| CA (1) | CA2259664A1 (en) |
| WO (1) | WO1998001721A1 (en) |
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1997
- 1997-06-27 EP EP97304630A patent/EP0816799A3/en not_active Withdrawn
- 1997-07-03 CA CA002259664A patent/CA2259664A1/en not_active Abandoned
- 1997-07-03 JP JP50499698A patent/JP3464678B2/en not_active Expired - Fee Related
- 1997-07-03 US US08/888,213 patent/US6069966A/en not_active Expired - Fee Related
- 1997-07-03 CN CN97197188A patent/CN1227629A/en active Pending
- 1997-07-03 WO PCT/IB1997/001100 patent/WO1998001721A1/en active IP Right Grant
-
1999
- 1999-01-04 KR KR1019997000010A patent/KR20000023566A/en active IP Right Grant
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