# US 10,480,580 B2 · Bearing comprising an angular movement sensor

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- Number: US 10,480,580 B2
- Document ID: US10480580B2
- Status: Granted
- Kind: B2
- Application number: 15/542,474
- Filed: 2016-01-13
- Published: 2018-09-27
- Granted: 2019-11-19
- Earliest claimed: 2015-01-13
- Assignees: Hutchinson
- Applicants: Hutchinson
- Inventors: Yohan Maniouloux; Gor Lebedev
- Web page: https://patentgrep.com/patent/US10480580B2

## CPC

- F16C 33/581: {integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels}
- F16C 19/163: {with angular contact}
- G01D 5/2053: {by a movable non-ferromagnetic conductive element}
- G01P 3/443: {mounted in bearings (bearings F16C)}
- F16C 2233/00: Monitoring condition, e.g. temperature, load, vibration
- G01D 5/2452: {incorporating two or more tracks having an (n, n+1, ...) relationship}
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G})

## Abstract

Disclosed is a bearing including a bearing ring and an inductive angular displacement sensor of the bearing ring, which includes a transducer and a target. The target is formed from a single conductive metal part and including a face with a base wall and one or a plurality of metal studs projecting from this base wall. The target is fastened firmly to the bearing ring, or is machined directly in the bearing ring.

## Claims

### Claim 1

Bearing comprising a bearing ring and an inductive angular displacement sensor of said bearing ring, said inductive sensor comprising:
a transducer including at least one primary winding suitable for producing a magnetic excitation, and at least one secondary winding including at least one turn, suitable for supplying an electromotive force at the terminals thereof in the presence of said excitation;
a target suitable for moving parallel with the transducer; and
said target being formed from a single conductive metal part and comprising a face with a base wall and one or a plurality of metal studs projecting from this base wall, said target being oriented towards the transducer of the inductive sensor, said studs thereby forming conductive patterns;
wherein said target is fastened firmly to the bearing ring, for which the angular displacement is measured by the transducer, or the target is machined directly in the bearing ring for which the angular displacement is measured by the transducer; and
wherein the conductive patterns are distributed along a zone having a dimension Dtot in a circular direction, said patterns being defined by the overlay of at least a first set of elementary periodic patterns having a period approximately equal to Dtot/N, including N first elementary conductive patterns of a dimension approximately equal to Dtot/2N in said direction, regularly distributed along said zone, and of a second set of elementary periodic patterns having a period approximately equal to Dtot/(N+r), including N+r second elementary patterns of a dimension approximately equal to Dtot/2(N+r) in said direction, regularly distributed along said zone, where N is an integer greater than or equal to 2 and r is a positive integer, different to zero and less than or equal to N−1, wherein the first and second elementary conductive patterns overlap at least partially.

### Claim 2 (depends on 1)

Bearing according to claim 1, wherein the target is fastened firmly to the bearing ring by a metal-on-metal force-fitting and/or metal-metal welding technique.

### Claim 3 (depends on 1)

Bearing according to claim 1, wherein the target is machined using a method chosen from a list comprising etching, sintering, molding, and embossing.

### Claim 4 (depends on 1)

Bearing according to claim 1, wherein the stud(s) have a height between 0.1 mm and 30 mm.

### Claim 5 (depends on 1)

Bearing according to claim 1, wherein the stud(s) have a height between 0.5 mm and 1.5 mm.

### Claim 6 (depends on 1)

Bearing according to claim 1, wherein the target has the general shape of a disk, and the studs are distributed along a circular annular strip.

### Claim 7 (depends on 1)

Bearing according to claim 1, wherein the first and second elementary conductive patterns have respectively the shape of portions of first and second overlaid strips parallel with said direction.

### Claim 8 (depends on 1)

Bearing according to claim 1, wherein N is an even number.

### Claim 9 (depends on 1)

Bearing according to claim 1, wherein r is equal to 1.

### Claim 10 (depends on 1)

Bearing according to claim 1, wherein the bearing ring is a ball bearing ring.