MAGNETIC SENSOR METHOD AND APPARATUS
First Claim
1. A modulating magnetic field device comprising:
- a base structure;
a processor;
at least one magnetic sensor operatively connected to the processor;
a rotating member which rotates relative to the base structure and the at least one magnetic sensor;
at least one flux concentrator operatively connected to the rotating member;
whereby as the rotating member turns, the at least one flux concentrator shields the magnetic sensor so as to modulate the output of the at least one magnetic sensor to the processor.
1 Assignment
0 Petitions
Accused Products
Abstract
A magnetic field sensing device comprising at least one magnetic sensor attached to a base structure, rotating member; and at least one flux concentrator mounted on the rotating member; whereby as the rotating member turns, the at least one flux concentrator shields the magnetic sensor so as to modulate the output of the at least one magnetic sensor. A second embodiment comprises a rotating member that rotates about an axis with at least one flux concentrator positioned thereon having a longitudinal axis in the radial direction of the rotating member; and at least one vector-type magnetic sensor fixedly mounted in the near proximity to the axis of the rotating member such that the magnetic field detected is modulated due to the rotation of the rotating member. Optionally, at least one fixed flux concentrator may be positioned along the periphery of the rotating member so as to increase magnetic flux input.
10 Citations
20 Claims
-
1. A modulating magnetic field device comprising:
-
a base structure; a processor; at least one magnetic sensor operatively connected to the processor; a rotating member which rotates relative to the base structure and the at least one magnetic sensor; at least one flux concentrator operatively connected to the rotating member; whereby as the rotating member turns, the at least one flux concentrator shields the magnetic sensor so as to modulate the output of the at least one magnetic sensor to the processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method of modulating a magnetic field comprising:
-
rotating a member about its axis, positioning at least one flux concentrator on the rotating member having a longitudinal axis in the radial direction of a the rotating member; mounting at least one vector-type magnetic sensor in the near proximity to said axis; operatively connecting the at least one vector-type sensor to a processor so as to provide output of the at least one sensor to the processor;
the at least one magnetic sensor being configured to optimally detect a magnetic field in the direction of a predetermined vector;whereby as the at least one flux concentrator revolves around the magnetic sensor, when the longitudinal axis of the at least one flux concentrator is in alignment with direction of the predetermined vector, the magnetic field flowing from the at least one flux concentrator to the at least one vector-type magnetic sensor is at a maximum and when the at least one flux concentrator rotates away from this aligned position, the flux flowing from the at least one flux concentrator to the at least one vector type magnetic sensor will decrease so as to modulate the output of the sensor to the processor.
-
-
10. A modulating magnetic field device comprising:
-
a base structure; a processor; a rotating member that rotates about an axis; at least one flux concentrator operatively connected to the rotating member having a longitudinal axis in the radial direction of the rotating member; at least one vector-type magnetic sensor fixedly mounted in the near proximity to said axis and operatively connected to said processor so as to provide output to the processor; the at least one magnetic sensor having configured to detect a magnetic field in the direction of a predetermined vector; whereby as the at least one flux concentrator revolves around the magnetic sensor, when the longitudinal axis of the at least one flux concentrator is in alignment with direction of the predetermined vector, the magnetic field flowing from the at least one flux concentrator to the at least one vector-type magnetic sensor is at a maximum and when the at least one flux concentrator rotates away from this aligned position, the magnetic field flowing from the at least one flux concentrator to the at least one vector type magnetic sensor will decrease so as to modulate the output of the sensor to the processor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification