Sensor for detecting a position of a transducer magnet

Patent metadata

Field	Value
Publication number	US-9726520-B2
Application number	US-201414770156-A
Country	US
Kind code	B2
Filing date	Feb 24, 2014
Priority date	Mar 1, 2013
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A sensor for detecting a position of a transducer magnet in a movement direction, including: —a coil carrier extending in the movement direction, —a first coil extending in the movement direction that is wound onto the coil carrier and—a second and a third coil oriented according to the first coil, which are wound onto the coil carrier such that the second and third coils accordingly form a first and second transformer with the first coil, the transformation ratio of which is dependent on the position of the transducer magnet, —wherein at least the second coil or the third coil is arranged between the coil carrier and the first coil.

First claim

The invention claimed is:

1. A sensor for detecting a position of a transducer magnet in a direction of movement, comprising:
a coil carrier, which extends in the direction of movement,
a first coil, which extends in the direction of movement and is wound up on the coil carrier, and
a second and a third coil, which are aligned according to the first coil and are wound up on the coil carrier, so that the second and third coils correspondingly form with the first coil a first and a second transformer, the transformation ratio of which is dependent on the position of the transducer magnet,
at least the second or third coil being arranged such that the coil carrier is positioned on a first side of the second or third coil and the first coil is positioned on a second side of the second or third coil opposite the first side.

2. The sensor as claimed in claim 1 , wherein the coil carrier comprises a main body which extends in the direction of movement and has a first and a second slot, which runs at least in certain regions in the circumferential direction around the direction of movement and in which the second and the third coil is correspondingly accommodated.

3. The sensor as claimed in claim 2 , wherein the second and third coils fill their corresponding slot up to an outer lateral surface of the main body, so that the second and third coils finish flush with the outer lateral surface of the main body.

4. The sensor as claimed in claim 2 , wherein the main body comprising a recess, which runs at least in certain regions in the circumferential direction around the direction of movement and is formed between the slots when viewed in the direction of movement.

5. The sensor as claimed in claim 4 , a surface of the main body being formed at an obtuse angle when considered in the direction of movement.

6. The sensor as claimed in claim 1 , the second and third coils being compactly wound coils in comparison with the first coil.

7. The sensor as claimed in claim 1 , the second coil and the third coil are arranged between the coil carrier and the first coil.

8. The sensor as claimed in claim 1 , the coil carrier (being produced from plastic, by an injection-molding process.

9. A device for actuating a brake system of a vehicle, comprising a brake pedal for setting a braking force by displacing the brake pedal in a direction of movement and a sensor according to claim 1 for detecting the position of the brake pedal in the direction of movement and for outputting a signal indicating the braking force to be set, in dependence on the detected position of the brake pedal.

10. A method for producing a sensor as claimed in claim 1 , comprising:
winding the second and third coils onto the coil carrier, and
winding the first coil onto the coil carrier over the second and third coils wound onto the coil carrier such that the coil carrier is positioned on the first side of the second and third coils and the first coil is positioned on the second side of the second and third coils opposite the first side.

11. The sensor as claimed in claim 3 , wherein the main body comprising a recess, which runs at least in certain regions in the circumferential direction around the direction of movement and is formed between the slots when viewed in the direction of movement.

Assignees

• Continental Teves Ag & Co Ohg

Inventors

• Acker Heinrich

Classifications

• G01D5/2046 Primary

  by a movable ferromagnetic element, e.g. a core · CPC title