US5054918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light scanning system for measurement of orientation and physical features of a workpiece
Assignee: Snap On Inc
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Filing: 1990-02-02
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Granted: 1991-10-08
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Expires: 2010-02-02
Abstract
Abstract A structured light scanning system observes, interprets and provides structural feature size, position and movement data in automotive service equipment applications where such feature characteristics must be determined either preliminary to or ultimately for measurement of quantities affecting automotive performance, such as tire/rim assembly balance, runout and alignment or brake surface planarity and smoothness.
Inventors
- 👤 Elizabeth A. Downing
- 👤 Steven W. Rogers
- 👤 Raymond Titsworth
- 👤 Donald J. Christian
- 👤 Michael L. Baird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:10
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/02; G01B; G01B11/00; G01B11/24; G01B11/25; G01B11/2504; G01B2210/00; G01B2210/10; G01B2210/14
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
116 words
A wheel rim/tire assembly parameter measurement apparatus for a dynamic wheel balancer having a spindle for mounting the wheel rim/tire assembly for rotation thereon, comprising light beam projection means mounted on the wheel balancer providing a light beam directed along a path toward a wheel rim/tire assembly on the spindle, optical means for converting said light beam to a beam contained in substantially a single plane, light sensing means exposed to light reflected from the area on the rim/tire assembly impinged by the converted light beam for providing signals responsive thereto, and means receiving said signals provided by said light sensing means for providing data relating to wheel rim/tire assembly feature locations, dimensions and physical configuration.
Claim 2
Dependent Claim
116 words
A wheel rim/tire assembly parameter measurement apparatus for a dynamic wheel balancer having a spindle for mounting the wheel rim/tire assembly for rotation thereon, comprising light beam projection means mounted on the wheel balancer providing a light beam directed along a path toward a wheel rim/tire assembly on the spindle, optical means for converting said light beam to a beam contained in substantially a single plane, light sensing means exposed to light reflected from the area on the rim/tire assembly impinged by the converted light beam for providing signals responsive thereto, and means receiving said signals provided by said light sensing means for providing data relating to wheel rim/tire assembly feature locations, dimensions and physical configuration.
Claim 3
Dependent Claim
43 words
A wheel balancer as in claim 1 wherein said light beam projection means comprises means for mounting said light beam projection means to illuminate the periphery of the wheel rim/tire assembly with said light beam, whereby the wheel rim/tire assembly runout is measured.
Claim 4
Dependent Claim
54 words
A wheel balancer as in claim 1 wherein the wheel rim has an inner rim and an outer rim and wherein said light beam projection means comprises means for mounting said light beam projection means to illuminate the inner and outer rims with said light beam whereby inner and outer rim separation is measured.
Claim 5
Dependent Claim
53 words
A wheel balancer as in claim 3 wherein said light beam projection means comprises a beam splitter for splitting said light beam, and reflector means, each of said beam splitter and said reflector means functioning to direct a portion of said split light beam toward one of the inner and outer rims, respectively.
Claim 6
Dependent Claim
73 words
A wheel balancer as in claim 1 wherein the wheel rim has an inner rim and an outer rim and wherein said light beam projection means comprises means for mounting said light beam projection means to illuminate the inner and outer rims and the periphery of the wheel rim/tire assembly with said light beam whereby rim edge and tire valve locations, inner and outer rim separation, and wheel rim/tire assembly runout are measured.
Claim 7
Dependent Claim
59 words
A wheel balancer as in claim 5 wherein said light sensing means comprises first, second and third light sensors exposed to said inner rim, wheel rim/tire assembly periphery and outer rim respectively, means for digitizing said light sensing means signals, and a digital signal processing for providing said data relating to wheel rim/tire assembly location, dimensions and physical configuration.
Claim 8
Dependent Claim
18 words
A wheel balancer as in claim 1 wherein said light beam projection means comprises a laser light source.
Claim 9
Dependent Claim
54 words
A wheel balancer as in claim 1 wherein said light beam projection means comprises a white light source, and wherein said optical means comprises a collimator interposed in the path of said light beam from said white light source, and a cylindrical lens interposed in the path of said light beam from said collimator.
Claim 10
Dependent Claim
51 words
A wheel balancer as in claim 1 wherein said light sensing means comprises a band pass filter receiving the reflected light and passing filtered reflected light, a lens exposed to and operating to focus the filtered reflected light, and a charge coupled device situated to receive the focused filtered reflected light.
Claim 11
Dependent Claim
49 words
A wheel balancer as in claim 1, wherein said light sensing means comprises a light sensitive camera, and wherein said means coupled to receive said signals responsive to reflected light comprises a vision system for providing said data relating to wheel rim/tire assembly feature locations, dimensions and physical configuration.
Claim 12
Dependent Claim
74 words
A wheel balancer as in claim 1, wherein said light sensing means comprises a two-dimensional charge coupled device array, and wherein said means coupled to receive said signals responsive to reflected light comprises an analog to digital converter providing a digital output, a memory store coupled to receive said digital output, and a microprocessor for accessing said memory store and providing said data relating to wheel rim/tire assembly feature locations, dimensions and physical configuration.
Claim 13
Dependent Claim
56 words
A wheel balancer as in claim 1, wherein said light sensing means comprises a two dimensional light sensing array, and wherein said means coupled to receive said signals responsive to reflected light comprises an analog to digital converter, and a processor for providing said data relating to wheel rim/tire assembly feature locations, dimensions and physical configuration.
Claim 14
Dependent Claim
70 words
A wheel rim/tire assembly parameter measurement apparatus for a dynamic wheel balancer as in claim 1 wherein said light beam projection means comprises first and second light beam projection means, and wherein said light sensing means comprises first and second light sensing means exposed to light reflected from the area on the rim/tire assembly impinged by the converted light beam from said first and second light beam projection means respectively.
Claim 15
Dependent Claim
113 words
Runout measurement apparatus for detecting runout in a rotatable member relative to a spin axis for the rotating member, comprising light beam projection means for projecting a light beam along a path toward the rotatable member, optical means for converting said light beam into a substantially planar beam, light sensing means disposed to receive light from said substantially planar beam which is reflected from the rotatable member, said light sensing means providing an output signal indicative of said planar beam reflection, and signal processing means coupled to said output signal for producing data representing a measurement of change in peripheral position of the rotatable member as it is rotated about the spin axis.
Claim 16
Dependent Claim
113 words
Runout measurement apparatus for detecting runout in a rotatable member relative to a spin axis for the rotating member, comprising light beam projection means for projecting a light beam along a path toward the rotatable member, optical means for converting said light beam into a substantially planar beam, light sensing means disposed to receive light from said substantially planar beam which is reflected from the rotatable member, said light sensing means providing an output signal indicative of said planar beam reflection, and signal processing means coupled to said output signal for producing data representing a measurement of change in peripheral position of the rotatable member as it is rotated about the spin axis.
Claim 17
Dependent Claim
75 words
Runout measurement apparatus as in claim 14 wherein the rotatable member is a brake disc, and wherein said spin axis is defined by the spindle of a brake disc lathe, and wherein said light beam projection means comprises a beam splitter for splitting said light beam, and reflector means, each of said beam splitter and said reflector means functioning to direct a portion of said split light beam toward opposing sides of said brake disc.
Claim 18
Dependent Claim
19 words
Runout measurement apparatus as in claim 15 wherein said light beam projection means further comprises a laser light source.
Claim 19
Dependent Claim
56 words
Runout measurement apparatus as in claim 15 wherein said light beam projection means further comprises a white light source, and wherein said optical means comprises a collimator interposed in the path of said light beam from said white light source, and a cylindrical lens interposed in the path of the said light beam from said collimator.
Claim 20
Dependent Claim
51 words
Runout measurement apparatus as in claim 15 wherein said light sensing means comprises a band pass filter receiving the reflected light and passing filtered reflected light, a lens exposed to and operating to focus the filtered reflected light, and a charge coupled device situated to receive the focused filtered reflected light.
Claim 21
Dependent Claim
70 words
Runout measurement apparatus as in claim 14 wherein said rotatable member is a wheel rim/tire assembly mounted on a vehicle being subjected to wheel alignment, and wherein said spin axis is defined by the spindle on which said wheel rim/tire assembly is mounted, said light beam projection means comprising means for mounting said light beam projection means to illuminate the periphery of the wheel rim/tire assembly with said light beam.
Claim 22
Dependent Claim
45 words
Runout measurement apparatus as in claim 19 wherein the wheel has an inner rim and an outer rim, and wherein said light beam projection means comprises means for mounting said light beam projection means to illuminate said inner and outer rims with said light beam.
Claim 23
Dependent Claim
52 words
Runout measurement apparatus as in claim 20 wherein said light beam projection means comprises a beam splitter for splitting said light beam and reflector means, each of said beam splitter and reflector means functioning to direct a portion of said slit light beam toward one of the inner and outer rims respectively.
Claim 24
Dependent Claim
53 words
Runout measurement apparatus as in claim 19 wherein the wheel has an inner rim and an outer rim and wherein said light beam projection means comprises means for mounting said light beam projection means to illuminate the inner and outer rims and the periphery of the wheel rim/tire assembly with said light beam.
Claim 25
Dependent Claim
18 words
Runout measurement apparatus as in claim 19 wherein said light beam projection means comprises a laser light source.
Claim 26
Dependent Claim
54 words
Runout measurement apparatus as in claim 19 wherein said light beam projection means comprises a white light source, and wherein said optical means comprises a collimator interposed in the path of said light beam from said white light source, and a cylindrical lens interposed in the path of said light beam from said collimator.
Claim 27
Dependent Claim
51 words
Runout measurement apparatus as in claim 19 wherein said light sensing means comprises a band pass filter receiving the reflected light an passing filtered reflected light, a lens exposed to and operating to focus the filtered reflected light, and a charge coupled device situated to receive the focused filtered reflected light.
Claim 28
Dependent Claim
105 words
Apparatus for determining the physical configuration of a body mounted for rotating motion on a spindle, comprising light beam projection means for projecting a light beam along a path directed toward the body on the spindle, optical means for converting said light beam into a beam contained substantially in a single plane and therefore called a planar light beam, light sensing means exposed to light reflected from the portion of the mounted body impinged by the planar light beam for providing output signals responsive thereto, and means coupled to said light sensing means for processing said signals to provide data related to the body configuration.
Claim 29
Dependent Claim
105 words
Apparatus for determining the physical configuration of a body mounted for rotating motion on a spindle, comprising light beam projection means for projecting a light beam along a path directed toward the body on the spindle, optical means for converting said light beam into a beam contained substantially in a single plane and therefore called a planar light beam, light sensing means exposed to light reflected from the portion of the mounted body impinged by the planar light beam for providing output signals responsive thereto, and means coupled to said light sensing means for processing said signals to provide data related to the body configuration.
Claim 30
Dependent Claim
35 words
Apparatus as in claim 26 comprising means for calibrating said light sensing means output signals, whereby said data relating to the body configuration is scaled to provide actual distances and locations in the body configuration.
Claim 31
Dependent Claim
53 words
Apparatus as in claim 26 wherein said body is a brake member having a friction surface thereon and said spindle is defined by a brake lathe, said light beam projection means comprising means for mounting said light beam projection means to illuminate the friction surface of said brake member with said light beam.
Claim 32
Dependent Claim
51 words
Apparatus as in claim 28 wherein said light beam projection means comprises a beam splitter for splitting said light beam, and reflector means, each of said beam splitter and said reflector means functioning to direct a portion of said split light beam towards opposite sides of said brake member friction surfaces.
Claim 33
Dependent Claim
16 words
Apparatus as in claim 28 wherein said light beam projection means comprises a laser light source.
Claim 34
Dependent Claim
52 words
Apparatus as in claim 28 wherein said light beam projection means comprises a white light source, and wherein said optical means comprises a collimator interposed in the path of said light beam from said white light source, and a cylindrical lens interposed in the path of said light beam from said collimator.
Claim 35
Dependent Claim
49 words
Apparatus as in claim 28 wherein said light sensing means comprises a band pass filter receiving the reflected light and passing filtered reflected light, a lens exposed to and operating to focus the filtered reflected light, and a charge coupled device situated to receive the focused filtered reflected light.
Claim 36
Dependent Claim
53 words
Apparatus as in claim 26 wherein said body is a vehicle wheel mounted on a vehicle wheel spindle situated to be accessed by a wheel alignment system, said light beam projection means comprising means for mounting said light beam projection means to illuminate the periphery of the vehicle wheel with said light beam.
Claim 37
Dependent Claim
16 words
Apparatus as in claim 33 wherein said light beam projection means comprises a laser light source.
Claim 38
Dependent Claim
52 words
Apparatus as in claim 33 wherein said light beam projection means comprises a white light source, and wherein said optical means comprises a collimator interposed in the path of said light beam from said white light source, and a cylindrical lens interposed in the path of said light beam from said collimator.
Claim 39
Dependent Claim
49 words
Apparatus as in claim 33 wherein said light sensing means comprises a band pass filter receiving the reflected light and passing filtered reflected light, a lens exposed to and operating to focus the filtered reflected light, and a charge coupled device situated to receive the focused filtered reflected light.
Claim 40
Dependent Claim
47 words
Apparatus as in claim 26 wherein said body is a wheel rim and wherein said spindle extends from a wheel balancer, said light beam projection means comprising means for mounting said light beam projection means to illuminate the periphery of the wheel rim with said light beam.
Claim 41
Dependent Claim
44 words
Apparatus as in claim 37 wherein the wheel rim has an inner rim and an outer rim and wherein said light beam projection means comprises means for mounting said light beam projection means to illuminate said inner and outer rims with said light beam.
Claim 42
Dependent Claim
51 words
Apparatus as in claim 37 wherein said light beam projection means comprises a beam splitter for splitting said light beam, and reflector means, each of said beam splitter and said reflector means functioning to direct a portion of said split light beam toward one of the inner and outer rims respectively.
Claim 43
Dependent Claim
16 words
Apparatus as in claim 37 wherein said light beam projection means comprises a laser light source.
Claim 44
Dependent Claim
52 words
Apparatus as in claim 37 wherein said light beam projection means comprises a white light source, and wherein said optical means comprises a collimator interposed in the path of said light beam from said white light source, and a cylindrical lens interposed in the path of said light beam from said collimator.
Claim 45
Dependent Claim
49 words
Apparatus as in claim 37 wherein said light sensing means comprises a band pass filter receiving the reflected light and passing filtered reflected light, a lens exposed to and operating to focus the filtered reflected light, and a charge coupled device situated to receive the focused filtered reflected light.
Claim 46
Independent Claim
136 words
A method of determining specific physical characteristics and features of a body which has some known general body characteristics and features, the body being mounted for rotational motion on a spindle having a known body coordinate system, comprising the steps of directing a planar light array toward the body from a known direction relative to the body coordinate system, detecting the impingement of said light array on the body from a known direction relative to said planar light array known direction, calibrating the detecting impingement of said light array for distances and locations in the known body coordinate system, and transforming the calibrated detected impingement into discrete distances and positions in the known body coordinate system, wherein the positions of the specific physical characteristics and features of the body are established in the body coordinate system.
Claim 47
Independent Claim
136 words
A method of determining specific physical characteristics and features of a body which has some known general body characteristics and features, the body being mounted for rotational motion on a spindle having a known body coordinate system, comprising the steps of directing a planar light array toward the body from a known direction relative to the body coordinate system, detecting the impingement of said light array on the body from a known direction relative to said planar light array known direction, calibrating the detecting impingement of said light array for distances and locations in the known body coordinate system, and transforming the calibrated detected impingement into discrete distances and positions in the known body coordinate system, wherein the positions of the specific physical characteristics and features of the body are established in the body coordinate system.
Claim 48
Dependent Claim
64 words
A method as in claim 43 wherein the step of transforming comprises the steps of calculating the positions of the detected impingement in a coordinate system with known orientation relative to the planar light array, transforming the positions in the planar light array coordinate system into the known body coordinate system, and extracting body feature data for use in determining the body physical characteristics.
Claim 49
Dependent Claim
53 words
A method as in claim 43 wherein the step of detecting comprises the steps of sensing the positions of impingement along the intersection of the planar light array and the body in two dimensions, and calculating the positions within a coordinate system having known orientation relative to the planar light array known direction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |