Sensor assembly for a rotary sensor

A sensor assembly for a rotary sensor, comprising:

• a sensor housing configured to be secured relative to a mounting environment, the sensor housing defining a cavity;
• a sensor shield having a first plate and a second plate, the first plate coupled to a first side of the sensor housing and the second plate coupled to a second side of the sensor housing, wherein the sensor shield is composed of a highly permeable material;
• and
• a sensor comprising a printed circuit board having an arc shape, wherein the sensor is disposed within the cavity of the sensor housing, the sensor comprising:
• a first array of sensor elements disposed along an inner circumference of the printed circuit board in a radially outward direction, wherein the first array of sensor elements is disposed on a first side of the printed circuit board;
• and
• a second array of sensor elements aligned along the inner circumference of the printed circuit board and disposed on the first side of the printed circuit board;
• wherein at least a portion of the sensor shield is disposed between one or more of the first array of sensor elements and the second array of sensor elements and the mounting environment such that the sensor shield is configured to act as a polepiece that enables a uniform field to be provided to the sensor by isolating the one or more of the first array of sensor elements and the second array of sensor elements from a magnetic field defined by a ferrous object within the mounting environment.

A rotary sensor for detecting a change in position of a rotary shaft, the rotary sensor comprising:

• a sensor housing configured to be secured relative to a mounting environment, the sensor housing defining a cavity;
• a sensor disposed within the cavity, wherein the sensor comprises a printed circuit board having an arc shape, wherein the printed circuit board comprises a plurality of sensor elements disposed along an inner circumference of the printed circuit board in a radially outward direction;
• a sensor shield defining a slot along a length of the sensor shield, wherein the sensor shield is composed of a highly permeable material and at least a portion of the sensor shield is disposed between the plurality of sensor elements and the mounting environment such that the sensor shield is configured to act as a polepiece that enables a uniform field to be provided to the sensor by isolating the plurality of sensor elements from a magnetic field defined by a ferrous object within the mounting environment;
• a bearing disposed within the cavity of the sensor housing, and positioned adjacent to the inner circumference of the printed circuit board;
• and
• the rotary shaft, rotatable about a rotational axis, wherein the rotary shaft is engaged with the bearing, and wherein the sensor housing, the bearing, and the rotary shaft are aligned along the rotational axis.