US5583797A
Expired / Lapsed
US
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Method and apparatus for wheel alignment audit
Assignee: Ford Global Technologies LLC
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Filing: 1994-11-03
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Granted: 1996-12-10
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Expires: 2014-11-03
Abstract
Abstract A method and apparatus for auditing motor vehicle wheel alignment includes a sensor for passively detecting physical cartesian relationships of at least one wheel on each motor vehicle, and a test station positioned for serially addressing each of the plurality of motor vehicles. A programmed computer control calculates measurements in response to representative signals from the sensors to identify the conditions of caster, camber and toe on the vehicle. A programmed analyzer for processing statistical process control techniques generates statistical data responsive to calculated measurements from the program computer control. Preferably, the test station is conveniently located along the production line for continuous but non-invasive detection of vehicle compliance with a predetermined level of standard deviation. Preferably, a feedback control responsive to the calculated measurements can adjust production fixture specifications or alignment settings when the analyzer identifies a threshold level of variation from the standard deviation. In the preferred embodiment, the test station has a tire rotator to adjust the sensed data for run-out.
Inventors
- 👤 Jerry H. Fluegge
- 👤 Prem R. Kumar
- 👤 Erich Mau
- 👤 Michael C. Mazzella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:09
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/26; G01B11/275; G01B11/2755; G01B2210/00; G01B2210/10; G01B2210/14; G01B2210/20; G01B2210/22
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
139 words
A wheel alignment auditing apparatus for an installed motor vehicle wheel for monitoring conditions of caster, camber and toe-in comprising: a test station positioned for serially addressing each of a plurality of motor vehicles proceeding from a production line, said test station having at least one rotator for rotating said vehicle wheels in said test station; at least one sensor for passively detecting physical cartesian relationships of at least one wheel on said each motor vehicle, and generating a representative signal; a programmed computer control for calculating measurements for at least one of said conditions from said representative signal; and a programmed analyzer for processing statistical process control (SPC) techniques to generate statistical data responsive to said measurements for identifying wheel alignment compliance with a predetermined level of standard deviation; wherein said test station comprises a dual strand conveyer.
Claim 2
Dependent Claim
139 words
A wheel alignment auditing apparatus for an installed motor vehicle wheel for monitoring conditions of caster, camber and toe-in comprising: a test station positioned for serially addressing each of a plurality of motor vehicles proceeding from a production line, said test station having at least one rotator for rotating said vehicle wheels in said test station; at least one sensor for passively detecting physical cartesian relationships of at least one wheel on said each motor vehicle, and generating a representative signal; a programmed computer control for calculating measurements for at least one of said conditions from said representative signal; and a programmed analyzer for processing statistical process control (SPC) techniques to generate statistical data responsive to said measurements for identifying wheel alignment compliance with a predetermined level of standard deviation; wherein said test station comprises a dual strand conveyer.
Claim 3
Dependent Claim
41 words
The invention as defined in claim 1 and further comprising: a feedback control responsive to said calculated measurement for adjusting production machines for aligning said wheel when said analyzer identifies a predetermined level of variation from said predetermined level of deviation.
Claim 4
Dependent Claim
18 words
The invention as defined in claim 1 wherein said at least one sensor comprises a light source sensor.
Claim 5
Dependent Claim
15 words
The invention as defined in claim 3 wherein said sensor comprises a laser beam sensor.
Claim 6
Dependent Claim
14 words
The invention as defined in claim 3 wherein said sensor comprises a LIDAR sensor.
Claim 7
Dependent Claim
17 words
The invention as defined in claim 1 wherein said at least one sensor comprises a microwave sensor.
Claim 8
Dependent Claim
17 words
The invention as defined in claim 1 wherein said at least one sensor comprises an ultrasonic sensor.
Claim 9
Dependent Claim
17 words
The invention as defined in claim 1 wherein said test station comprises a dynamometer roll test station.
Claim 10
Dependent Claim
17 words
The invention as defined in claim 1 and further comprising an automated displacement support for said sensor.
Claim 11
Independent Claim
104 words
A method for auditing motor vehicle wheel alignment comprising: rotating a motor vehicle mounted wheel at a test station; passively sensing physical cartesian relationships of said motor vehicle wheel as it rotates and generating a responsive signal for each sensed relationship; calculating a measurement for at least one of said conditions from said responsive signal; processing statistical process control techniques including identifying a tested vehicle wheel's compliance with a predetermined level of standard deviation; calculating a first output for communicating a particular vehicle compliance condition at a production line work station; and determining a production analysis for selecting said predetermined level of standard deviation.
Claim 12
Independent Claim
104 words
A method for auditing motor vehicle wheel alignment comprising: rotating a motor vehicle mounted wheel at a test station; passively sensing physical cartesian relationships of said motor vehicle wheel as it rotates and generating a responsive signal for each sensed relationship; calculating a measurement for at least one of said conditions from said responsive signal; processing statistical process control techniques including identifying a tested vehicle wheel's compliance with a predetermined level of standard deviation; calculating a first output for communicating a particular vehicle compliance condition at a production line work station; and determining a production analysis for selecting said predetermined level of standard deviation.
Claim 13
Dependent Claim
27 words
The invention as defined in claim 10 wherein said method comprises adjusting equipment for a subsequently produced vehicle wheel by signalling a feedback signal from said processing.
Claim 14
Dependent Claim
20 words
The invention as defined in claim 10 wherein said rotating step comprises transferring said motor vehicle along a conveyor strand.
Claim 15
Dependent Claim
128 words
A wheel alignment auditor for motor vehicle production comprising: a passive test station on a production line for serially addressing each of the production vehicles; a non-contact sensor for passively detecting physical cartesian relationships of caster, camber and toe-in, and generating a representative signal for each of said detected physical relationships; a computer controlled calculator for determining measurements from said representative signals; a processor for statistical process control techniques to generate statistical data responsive to said measurements for identifying compliance with a predetermined level of standard deviation; an adjuster for realigning production specifications in response to identification of a threshold of compliance outside a predetermined level of compliance; and feedback control to a remote station off-line from said production line for repair of selected motor vehicles from production.
Claim 16
Dependent Claim
128 words
A wheel alignment auditor for motor vehicle production comprising: a passive test station on a production line for serially addressing each of the production vehicles; a non-contact sensor for passively detecting physical cartesian relationships of caster, camber and toe-in, and generating a representative signal for each of said detected physical relationships; a computer controlled calculator for determining measurements from said representative signals; a processor for statistical process control techniques to generate statistical data responsive to said measurements for identifying compliance with a predetermined level of standard deviation; an adjuster for realigning production specifications in response to identification of a threshold of compliance outside a predetermined level of compliance; and feedback control to a remote station off-line from said production line for repair of selected motor vehicles from production.
Claim 17
Dependent Claim
142 words
A wheel alignment auditing apparatus for an installed motor vehicle wheel for monitoring conditions of caster, camber and toe-in comprising: a test station positioned for serially addressing each of a plurality of motor vehicles proceeding from a production line, said test station having at least one rotator for rotating said vehicle wheels in said test station; at least one sensor for passively detecting physical cartesian relationships of at least one wheel on said each motor vehicle, and generating a representative signal; a programmed computer control for calculating measurements for at least one of said conditions from said representative signal; and a programmed analyzer for processing statistical process control (SPC) techniques to generate statistical data responsive to said measurements for identifying wheel alignment compliance with a predetermined level of standard deviation; wherein said at least one sensor comprises a LIDAR light source sensor.
Claim 18
Dependent Claim
142 words
A wheel alignment auditing apparatus for an installed motor vehicle wheel for monitoring conditions of caster, camber and toe-in comprising: a test station positioned for serially addressing each of a plurality of motor vehicles proceeding from a production line, said test station having at least one rotator for rotating said vehicle wheels in said test station; at least one sensor for passively detecting physical cartesian relationships of at least one wheel on said each motor vehicle, and generating a representative signal; a programmed computer control for calculating measurements for at least one of said conditions from said representative signal; and a programmed analyzer for processing statistical process control (SPC) techniques to generate statistical data responsive to said measurements for identifying wheel alignment compliance with a predetermined level of standard deviation; wherein said at least one sensor comprises a LIDAR light source sensor.
Claim 19
Dependent Claim
140 words
A wheel alignment auditing apparatus for an installed motor vehicle wheel for monitoring conditions of caster, camber and toe-in comprising: a test station positioned for serially addressing each of a plurality of motor vehicles proceeding from a production line, said test station having at least one rotator for rotating said vehicle wheels in said test station; at least one sensor for passively detecting physical cartesian relationships of at least one wheel on said each motor vehicle, and generating a representative signal; a programmed computer control for calculating measurements for at least one of said conditions from said representative signal; and a programmed analyzer for processing statistical process control (SPC) techniques to generate statistical data responsive to said measurements for identifying wheel alignment compliance with a predetermined level of standard deviation; wherein said at least one sensor comprises a microwave sensor.
Claim 20
Dependent Claim
140 words
A wheel alignment auditing apparatus for an installed motor vehicle wheel for monitoring conditions of caster, camber and toe-in comprising: a test station positioned for serially addressing each of a plurality of motor vehicles proceeding from a production line, said test station having at least one rotator for rotating said vehicle wheels in said test station; at least one sensor for passively detecting physical cartesian relationships of at least one wheel on said each motor vehicle, and generating a representative signal; a programmed computer control for calculating measurements for at least one of said conditions from said representative signal; and a programmed analyzer for processing statistical process control (SPC) techniques to generate statistical data responsive to said measurements for identifying wheel alignment compliance with a predetermined level of standard deviation; wherein said at least one sensor comprises a microwave sensor.
Claim 21
Dependent Claim
140 words
A wheel alignment auditing apparatus for an installed motor vehicle wheel for monitoring conditions of caster, camber and toe-in comprising: a test station positioned for serially addressing each of a plurality of motor vehicles proceeding from a production line, said test station having at least one rotator for rotating said vehicle wheels in said test station; at least one sensor for passively detecting physical cartesian relationships of at least one wheel on said each motor vehicle, and generating a representative signal; a programmed computer control for calculating measurements for at least one of said conditions from said representative signal; and a programmed analyzer for processing statistical process control (SPC) techniques to generate statistical data responsive to said measurements for identifying wheel alignment compliance with a predetermined level of standard deviation; wherein said at least one sensor comprises an ultrasonic sensor.
Claim 22
Dependent Claim
140 words
A wheel alignment auditing apparatus for an installed motor vehicle wheel for monitoring conditions of caster, camber and toe-in comprising: a test station positioned for serially addressing each of a plurality of motor vehicles proceeding from a production line, said test station having at least one rotator for rotating said vehicle wheels in said test station; at least one sensor for passively detecting physical cartesian relationships of at least one wheel on said each motor vehicle, and generating a representative signal; a programmed computer control for calculating measurements for at least one of said conditions from said representative signal; and a programmed analyzer for processing statistical process control (SPC) techniques to generate statistical data responsive to said measurements for identifying wheel alignment compliance with a predetermined level of standard deviation; wherein said at least one sensor comprises an ultrasonic sensor.
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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) | 1999-12-10 | 2000-06-10 | 2000-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-10 | 2004-06-10 | 2004-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-10 | 2008-06-10 | 2008-12-10 | $7700.00 | Window Closed / Lapsed |