US 2017/0254676 A1 · HIGH-RESOLUTION MULTI-TURN SENSING APPARATUS AND METHODS

Abstract

High-resolution multi-turn sensing apparatus and methods. A method can be implemented to sense a rotational position of a shaft having a longitudinal axis. Such a method can include determining a turn number of the shaft with a first magnet arranged in a non-contact manner with a first magnetic sensor to allow measurement of a linear position of the first magnet relative to the first magnetic sensor. The linear position can be representative of a turn number of the shaft. The method can further include determining an angular position of the shaft within a given turn with a second magnet positioned at an end of the shaft along the longitudinal axis and arranged relative to a second magnetic sensor. The method can further include combining the turn number with the angular position to generate one or more output signals representative of a measured rotational position of the shaft.

Claims20

Dependent claims

A method for sensing a rotational position of a shaft having a longitudinal axis, the method comprising:

determining a turn number of the shaft with a first magnet arranged in a non-contact manner with a first magnetic sensor to allow measurement of a linear position of the first magnet relative to the first magnetic sensor, the linear position representative of a turn number of the shaft;
determining an angular position of the shaft within a given turn with a second magnet positioned at an end of the shaft along the longitudinal axis and arranged relative to a second magnetic sensor;
and
combining the turn number with the angular position to generate one or more output signals representative of a measured rotational position of the shaft.

1 more element

Dependencies are inferred from the claim text.

High-resolution multi-turn sensing apparatus and methods

Life of this patent

High-resolution multi-turn sensing apparatus and methods

Life of this patent

Abstract

Claims20