Rotation detector
First Claim
Patent Images
1. A rotation detector, comprising:
- a first distance sensor disposed to face a body that rotates about an axis with a gear portion formed non-parallel to a rotation axis for continuously measuring a distance from the gear portion during rotation of the rotating body;
a second distance sensor disposed at a position different from the first distance sensor along a direction parallel to the rotation axis for continuously measuring a distance from the gear portion during rotation of the rotating body; and
an axis shift detecting portion for detecting an axis shift of the rotation axis based on a variation in the distance measured by at least one of the first and second distance sensors,wherein the axis shift detecting portion detects axis shifts along an x-axis, a y-axis and a z-axis as well as angular shifts of the axis of rotation.
1 Assignment
0 Petitions
Accused Products
Abstract
A rotation detector includes a first distance sensor disposed to face a rotating body with a gear portion formed non-parallel to a rotation axis for continuously measuring a distance from the gear portion during rotation of the rotating body, a second distance sensor disposed at a position different from the first distance sensor in a direction of the rotation axis for continuously measuring a distance from the gear portion during rotation of the rotating body, and an axis shift detecting portion for detecting an axis shift of the rotation axis based on a variation in the distance measured by at least one of the first and second distance sensors.
8 Citations
8 Claims
-
1. A rotation detector, comprising:
-
a first distance sensor disposed to face a body that rotates about an axis with a gear portion formed non-parallel to a rotation axis for continuously measuring a distance from the gear portion during rotation of the rotating body; a second distance sensor disposed at a position different from the first distance sensor along a direction parallel to the rotation axis for continuously measuring a distance from the gear portion during rotation of the rotating body; and an axis shift detecting portion for detecting an axis shift of the rotation axis based on a variation in the distance measured by at least one of the first and second distance sensors, wherein the axis shift detecting portion detects axis shifts along an x-axis, a y-axis and a z-axis as well as angular shifts of the axis of rotation. - View Dependent Claims (2, 3, 4, 5, 8)
-
-
6. A rotation detector, comprising:
-
a first distance sensor disposed to face a body that rotates about an axis with a gear portion formed non-parallel to a rotation axis for continuously measuring a distance from the gear portion during rotation of the rotating body; a second distance sensor disposed at a position different from the first distance sensor along a direction parallel to the rotation axis for continuously measuring a distance from the gear portion during rotation of the rotating body, and an axis shift detecting portion for detecting an axis shift of the rotation axis based on a variation in the distance measured by at least one of the first and second distance sensors, wherein the first and second distance sensors are disposed at positions to provide the same argument on an x-y plane centered around the rotation axis. - View Dependent Claims (7)
-
Specification