Hybrid position sensor

Patent metadata

Field	Value
Publication number	US-12078482-B2
Application number	US-202318099421-A
Country	US
Kind code	B2
Filing date	Jan 20, 2023
Priority date	Mar 4, 2020
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

A hybrid position sensor for determining the position of a hybrid target includes a main transducer for obtaining a first signal indicative for a position of the hybrid target within a first range and with a first resolution using a first or second technology; a support transducer for obtaining a second signal indicative for the position of the hybrid target within a second range and with a second resolution using the second technology if the main transducer is using the first technology and vice versa, wherein the first range is smaller than the second and the first resolution is higher than the second, and wherein the first technology is magnet based and the second technology is an inductive technology; a combiner for combining the obtained first signal and second signal to determine the position of the hybrid target.

First claim

The invention claimed is:

1. A hybrid target comprising:
a non-magnetic electrically conductive target; and
an electrically isolating magnet,
wherein the electrically isolating magnet comprises an insulating material; and
wherein the hybrid target is configured for inducing a first signal indicative for a position of the hybrid target within a first range and with a first resolution using the non-magnetic electrically conductive target or the electrically isolating magnet and a second signal indicative for the position of the hybrid target within a second range and with a second resolution by means of the non-magnetic electrically conductive target if the electrically isolating magnet is configured for inducing the first signal and vice versa.

2. The hybrid target according to claim 1 , wherein the electrically conductive target and the electrically isolating magnet are integrated in one component.

3. The hybrid target according to claim 1 , wherein the electrically conductive target and the electrically isolating magnet are separate components that are connected together.

4. The hybrid target according to claim 1 , wherein the electrically conductive target and the electrically isolating magnet are at least partially overlapping.

5. The hybrid target according to claim 1 , wherein at least one of the electrically conductive target and the electrically isolating magnet is a planar component.

6. The hybrid target according to claim 1 , wherein at least one of the electrically conductive target and the electrically isolating magnet is a circular planar component.

7. The hybrid target according to claim 6 , wherein both the electrically conductive target and the electrically isolating magnet are circular planar components, the electrically conductive target and the electrically isolating magnet having a same central axis.

8. The hybrid target according to claim 1 , wherein a radius of the electrically conductive target is smaller than or equal to a radius of the electrically isolating magnet.

9. The hybrid target according to claim 1 , wherein the electrically conductive target comprises a patterned metallic film.

10. The hybrid target according to claim 9 , wherein the patterned metallic film comprises aluminum.

11. The hybrid target according to claim 1 , wherein the electrically conductive target has a thickness of less than 100 μm.

12. The hybrid target according to claim 1 , wherein the electrically conductive target is stacked on the electrically isolating magnet.

13. The hybrid target according to claim 1 , wherein the electrically conductive target and the electrically isolating magnet are stacked together, such that the electrically conductive target and the electrically isolating magnet have a same rotation axis.

14. The hybrid target according to claim 1 , wherein the electrically conductive target comprises a three-lobe conductive target.

15. The hybrid target according to claim 1 , wherein the electrically isolating magnet comprises a two-pole magnet.

16. The hybrid target according to claim 1 , wherein the electrically isolating magnet comprises Neodymium.

17. The hybrid target according to claim 1 , wherein the electrically conductive target comprises Neodymium.

18. The hybrid target according to claim 1 , wherein the electrically isolating magnet comprises ferrite.

19. The hybrid target according to claim 1 , wherein the electrically conductive target comprises nickel.

20. The hybrid target according to claim 1 , wherein the electrically conductive target and the electrically isolating magnet have a same shape.

Assignees

• Melexis Tech Sa

Inventors

• Close Gael
• Lugani Lorenzo

Classifications

• G01D5/16

  by varying resistance · CPC title

• G01D5/145 Primary

  influenced by the relative movement between the Hall device and magnetic fields (see G01R33/06) · CPC title

• G01B7/003 Primary

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

• G01D3/024

  for range change; Arrangements for substituting one sensing member by another · CPC title

• G01D3/036

  on measuring arrangements themselves · CPC title