Sensor device for measuring the position of an element

Patent metadata

Field	Value
Publication number	US-11740105-B2
Application number	US-202117174498-A
Country	US
Kind code	B2
Filing date	Feb 12, 2021
Priority date	Feb 13, 2020
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

A sensor device for measuring a rotational position of an element that is rotatable about an axis of rotation includes a sender member emitting a magnetic field, a first receiving member formed by a first conductor and receiving the magnetic field, and a second receiving member formed by a second conductor and receiving the magnetic field. The first receiving member and the second receiving member are arranged within an annular ring segment having a period along a circumferential direction about the axis of rotation. The first conductor and the second conductor each define a plurality of loops. A shape of each of the loops follows in the circumferential direction a base function with half the period, the shape of only some of the loops deviates from the base function by a correction function.

First claim

What is claimed is:

1. A sensor device for measuring a rotational position of an element that is rotatable about an axis of rotation, comprising:
a sender member emitting a magnetic field;
a first receiving member formed by a first conductor and receiving the magnetic field; and
a second receiving member formed by a second conductor and receiving the magnetic field, the first receiving member and the second receiving member arranged within an annular ring segment having a period along a circumferential direction about the axis of rotation, the first conductor and the second conductor each define a plurality of loops, a shape of each of the loops follows in the circumferential direction a base function with half the period, the base function is composed of a plurality of trigonometric functions, the shape of only some of the loops of one of the first conductor and the second conductor deviates from the base function by a correction function and the shape of the other of the loops of the one of the first conductor and the second conductor follows the base function.

2. The sensor device of claim 1 , wherein the first conductor forms an even number of first loops and the second conductor forms an odd number of second loops.

3. The sensor device of claim 2 , wherein the first loops are eye-shaped.

4. The sensor device of claim 2 , wherein the second loops are candy-shaped.

5. The sensor device of claim 1 , wherein a centroid of each of a plurality of areas delimited by the first conductor and the second conductor is substantially equal in the circumferential direction.

6. The sensor device of claim 1 , wherein the correction function is derived by changing an amplitude and/or a phase of at least one of the trigonometric functions.

7. The sensor device of claim 1 , wherein each loop is substantially mirror symmetrical with respect to the circumferential direction.

8. The sensor device of claim 1 , wherein the first conductor and the second conductor follow a substantially mirror symmetrical trace with respect to a radial direction.

9. The sensor device of claim 1 , wherein the loops of the first conductor are shifted by a quarter of the period along the circumferential direction with respect to the loops of the second conductor.

10. The sensor device of claim 1 , wherein a pair of abutting loops of the loops of the first conductor are wound in opposite directions and a pair of abutting loops of the loops of the second conductor are wound in opposite directions.

11. The sensor device of claim 1 , wherein a plurality of curved sections of the first conductor and the second conductor define the loops in the circumferential direction.

12. The sensor device of claim 1 , wherein the sender member is a coil.

13. The sensor device of claim 1 , wherein the sender member surrounds the first receiving member and the second receiving member.

14. The sensor device of claim 1 , wherein the sender member and/or at least one of the first receiving member and the second receiving member substantially lie in a plane.

15. The sensor device of claim 1 , wherein at least one of the first receiving member and the second receiving member is formed by a conductive path on a printed circuit board.

16. A sensor device for measuring a linear position of an element that is movable linearly along an axis, comprising:
a sender member emitting a magnetic field;
a first receiving member formed by a first conductor and receiving the magnetic field;

and a second receiving member formed by a second conductor and receiving the magnetic field, the first receiving member and the second receiving member arranged within a segment having a length along the axis, the first conductor and the second conductor each define a plurality of loops, a shape of each of the loops follows along the axis a base function with half the length, the base function is composed of a plurality of trigonometric functions, the shape of only some of the loops of one of the first conductor and the second conductor deviates from the base function by a correction function and the shape of the other of the loops of the one of the first conductor and the second conductor follows the base function.

Assignees

• Te Connectivity Belgium Bv
• Te Connectivity Germany Gmbh

Inventors

• Ocket Tom
• Becker Tobias
• Harz Moritz

Classifications

• G01D5/2006 Primary

  by influencing the self-induction of one or more coils (G01D5/22 takes precedence) · CPC title

• H01F7/20

  without armatures (cores H01F3/00; coils H01F5/00 {; shaping metal by applying magnetic forces B21D26/14; electromagnets specially adapted for NMR applications G01R33/381}) · CPC title

• G01B7/003 Primary

  for measuring position, not involving coordinate determination (coordinate measuring G01B7/004) · CPC title

• G01D5/2053 Primary

  by a movable non-ferromagnetic conductive element · CPC title