SENSOR ASSEMBLY WITH AN ENCODER DISC

摘要

A sensor assembly with an inductive sensor and a marking ring that is rotatably mountable is provided. The marking ring is spaced apart from and aligned with the inductive sensor, and includes a non-ferrous body and a ferrous material ring that is located at least partially within the non-ferrous body and adapted to pass in proximity to the inductive sensor upon rotation of the marking ring. The ferrous material ring includes protrusions that vary non-uniformly in at least one of spacing, distance from the inductive sensor to a facing portion of the ferrous material ring, or mass, in a circumferential direction around the marking ring. The inductive sensor detects a rotational angle position of the marking ring based on the protrusions of the ferrous material ring as they pass the inductive sensor.

主权项

1. A sensor assembly, comprising:
an inductive sensor; a marking ring rotatably mountable in a position spaced apart from and aligned with the inductive sensor, the marking ring includes a non-ferrous body and a ferrous material ring located at least partially within the non-ferrous body adapted to pass in proximity to the inductive sensor upon rotation of the marking ring; and the ferrous material ring includes protrusions that vary non-uniformly in at least one of (a) spacing, (b) distance from the inductive sensor to a facing portion of the ferrous material ring, or (c) mass, in a circumferential direction around the marking ring, wherein the inductive sensor detects a rotational angle position of the marking ring based on the protrusions of the ferrous material ring as they pass the inductive sensor.