Magnetic motion sensor

• US 6,584,846 B2
• Filed: 05/03/2001
• Issued: 07/01/2003
• Est. Priority Date: 09/28/2000
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Wesselak, Viktor
• Primary Examiner(s): MOLLER, RICHARD ALAN
• Application Number:
  US09/848,686
• Publication Number:
  US 20020070728A1
• Time in Patent Office: 789 Days
• Field of Search: 735/143.1, 735/143.3, 735/143.9, 324/207.14, 324/207.15, 324/207.21, 324/207.24, 324/207.25
• US Class Current: 73/514.31
• CPC Class Codes: G01D 5/147 influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other

Abstract

A magnetic motion sensor, having a mobile magnet that generates an essentially homogeneous magnetic field with a magnetic-field direction, and having a coupling element which is stationary within the magnetic field, and wherein a motion-dependent physical quantity is induced in the coupling element when the magnet moves perpendicular to the magnetic-field direction, and the induced quantity is measured and output by a sampling element.

Claims

1. A magnetic motion sensor, comprising a mobile magnet that generates an essentially homogeneous magnetic field with a magnetic-field direction, and a coupling element which is stationary within the magnetic field, wherein a motion-dependent physical quantity is induced in the coupling element when the magnet moves perpendicular to the magnetic-field direction.

2. The motion sensor according to claim 1, wherein the motion of the magnet is a translational motion.

3. The motion sensor according to claim 1, wherein the motion of the magnet is a rotational motion.

4. The motion sensor according to claim 1, wherein the motion-dependent physical quantity is a force.

5. The motion sensor according to claim 1, wherein motion-dependent physical quantity is a current.

6. The motion sensor according to claim 1, wherein the motion-dependent physical quantity is proportional to velocity.

7. The motion sensor according to claim 1, wherein the motion-dependent physical quantity is proportional to acceleration.

8. The motion sensor according to claim 1, wherein the magnet is designed as a permanent magnet.

9. The motion sensor according to claim 1, wherein the coupling element is a solid body.

10. The motion sensor according to claim 1, wherein the coupling element is designed as an electrically conductive element.

11. The motion sensor according to claim 2, wherein the sampling element is mechanically connected to the coupling element.

12. The motion sensor according to claim 1, further comprising a sampling element wherein the induced motion-dependent physical quantity is measured and outputted.

13. The motion sensor according to claim 1, wherein the motion-dependent physical quantity is a moment.