US5811683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for location of anomalous signal in a radial bearing
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1997-04-02
•
Granted: 1998-09-22
•
Expires: 2017-04-02
Abstract
Abstract A method for locating a source position of an anomalous signal in a radial bearing comprises using a signal detection sensor, an inner-ring positional detection sensor for detecting a rotational position of a bearing inner ring, and a ball positional detection sensor for detecting a revolution position of bearing-balls. Signals from the signal detection sensor, inner-ring positional detection sensor, and ball positional detection sensor are used to locate positions of contact between balls and the inner or outer ring at a time of anomalous signal generation, within a load zone, as an anomalous signal source position.
Inventors
- 👤 Takeo Yoshioka
- 👤 Atsushi Korenaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:12
CPC Classifications
G; G01; G01M; G01M13/00; G01M13/04; G01M13/045; F; F16; F16C; F16C19/00; F16C19/52; F16C19/527
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
180 words
An apparatus for locating a source position of an anomalous signal in a radial bearing that includes an inner ring, an outer ring coaxial with the inner ring, and a plurality of balls between the inner ring and the outer ring, said apparatus comprising: (a) a track of at least one of the inner ring and outer ring divided into a predetermined number of equal sections; (b) an inner-ring positional detection sensor to detect a rotational position of the inner ring; (c) a ball positional detection sensor to detect a revolution position of the balls; (d) a signal detection sensor to detect an anomalous signal generated from the radial bearing; (e) an arithmetic unit to calculate positions of contact between the balls and the inner or outer ring from outputs from said inner-ring positional detection sensor and said ball positional detection sensor when said signal detection sensor detects said anomalous signal; and (f) means for locating as an anomalous signal source position one of said predetermined number of equal sections from which a largest number of anomalous signals are generated.
Claim 2
Independent Claim
180 words
An apparatus for locating a source position of an anomalous signal in a radial bearing that includes an inner ring, an outer ring coaxial with the inner ring, and a plurality of balls between the inner ring and the outer ring, said apparatus comprising: (a) a track of at least one of the inner ring and outer ring divided into a predetermined number of equal sections; (b) an inner-ring positional detection sensor to detect a rotational position of the inner ring; (c) a ball positional detection sensor to detect a revolution position of the balls; (d) a signal detection sensor to detect an anomalous signal generated from the radial bearing; (e) an arithmetic unit to calculate positions of contact between the balls and the inner or outer ring from outputs from said inner-ring positional detection sensor and said ball positional detection sensor when said signal detection sensor detects said anomalous signal; and (f) means for locating as an anomalous signal source position one of said predetermined number of equal sections from which a largest number of anomalous signals are generated.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1, wherein the inner ring is divided into 82 equal sections and the outer ring is divided into 17 equal sections.
Claim 4
Independent Claim
185 words
A method for locating a source position of an anomalous signal in a radial bearing that includes an inner ring, an outer ring coaxial with the inner ring, and a plurality of balls between the inner ring and the outer ring, said method comprising the steps of: (a) dividing a track of at least one of the inner ring and outer ring into a predetermined number of equal sections; (b) using an inner-ring positional detection sensor to detect a rotational position of the inner ring; (c) using a ball positional detection sensor to detect a revolution position of the balls; (d) using a signal detection sensor to detect an anomalous signal generated from the radial bearing; (e) using an arithmetic unit to calculate positions of contact between the balls and the inner or outer ring from outputs from said inner-ring positional detection sensor and said ball positional detection sensor when said signal detection sensor detects said anomalous signal; and (f) locating as an anomalous signal source position one of said predetermined number of equal sections from which a largest number of anomalous signals are generated.
Claim 5
Independent Claim
185 words
A method for locating a source position of an anomalous signal in a radial bearing that includes an inner ring, an outer ring coaxial with the inner ring, and a plurality of balls between the inner ring and the outer ring, said method comprising the steps of: (a) dividing a track of at least one of the inner ring and outer ring into a predetermined number of equal sections; (b) using an inner-ring positional detection sensor to detect a rotational position of the inner ring; (c) using a ball positional detection sensor to detect a revolution position of the balls; (d) using a signal detection sensor to detect an anomalous signal generated from the radial bearing; (e) using an arithmetic unit to calculate positions of contact between the balls and the inner or outer ring from outputs from said inner-ring positional detection sensor and said ball positional detection sensor when said signal detection sensor detects said anomalous signal; and (f) locating as an anomalous signal source position one of said predetermined number of equal sections from which a largest number of anomalous signals are generated.
Claim 6
Dependent Claim
26 words
The method of claim 3, wherein the dividing step divides the inner ring into 82 equal sections and divides the outer ring into 17 equal sections.
Claim 7
Dependent Claim
31 words
The method of claim 3, wherein the step (f) locates said one of said predetermined number of equal sections by forming a histogram of said calculated positions from the step (e).
Claim 8
Dependent Claim
31 words
The method of claim 4, wherein the step (f) locates said one of said predetermined number of equal sections by forming a histogram of said calculated positions from the step (e).
Claim 9
Dependent Claim
30 words
The method of claim 3, wherein the inner-ring positional detection sensor is fixed on a predetermined axis and the ball positional sensor is fixed clockwise 135° from the predetermined axis.
Claim 10
Dependent Claim
30 words
The method of claim 4, wherein the inner-ring positional detection sensor is fixed on a predetermined axis and the ball positional sensor is fixed clockwise 135° from the predetermined axis.
Claim 11
Dependent Claim
30 words
The method of claim 5, wherein the inner-ring positional detection sensor is fixed on a predetermined axis and the ball positional sensor is fixed clockwise 135° from the predetermined axis.
Claim 12
Dependent Claim
30 words
The method of claim 6, wherein the inner-ring positional detection sensor is fixed on a predetermined axis and the ball positional sensor is fixed clockwise 135° from the predetermined axis.
Claim 13
Dependent Claim
26 words
The apparatus of claim 1, wherein the means locates said one of said predetermined number of equal sections by forming a histogram of said calculated positions.
Claim 14
Dependent Claim
26 words
The apparatus of claim 2, wherein the means locates said one of said predetermined number of equal sections by forming a histogram of said calculated positions.
Claim 15
Dependent Claim
30 words
The apparatus of claim 1, wherein the inner-ring positional detection sensor is fixed on a predetermined axis and the ball positional sensor is fixed clockwise 135° from the predetermined axis.
Claim 16
Dependent Claim
30 words
The apparatus of claim 2, wherein the inner-ring positional detection sensor is fixed on a predetermined axis and the ball positional sensor is fixed clockwise 135° from the predetermined axis.
Claim 17
Dependent Claim
30 words
The apparatus of claim 11, wherein the inner-ring positional detection sensor is fixed on a predetermined axis and the ball positional sensor is fixed clockwise 135° from the predetermined axis.
Claim 18
Dependent Claim
30 words
The apparatus of claim 12, wherein the inner-ring positional detection sensor is fixed on a predetermined axis and the ball positional sensor is fixed clockwise 135° from the predetermined axis.
References Cited (Backward Citations)
US4669315A
Cited
US4991442A
Cited
JPH03120460A
Cited
US5142916A
Cited
US5200697A
Cited
US5200697B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-21 | 2002-03-23 | 2002-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-21 | 2006-03-23 | 2006-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-21 | 2010-03-23 | 2010-09-22 | $7700.00 | Window Closed / Lapsed |