US 2019/0195656 A1 · METHOD FOR DETECTING ANGLE OF ROTATION USING AUTOMATIC GAIN ADJUSTMENT ALGORITHM AND APPARATUS THEREOF

Abstract

A rotation angle detecting method includes detecting a first rotation angle based on a first measured magnetic value received from a first hall element, detecting a first magnetic value received from a second hall element corresponding to the first detected rotation angle, adjusting a gain based on a first difference value between a second measured magnetic value received from the second hall element, in response to one of the magnetic pieces being rotated at the first rotation angle, and the first magnetic value, redetecting a second rotation angle by applying the gain to the first magnetic value and redetecting a second magnetic value received from the second hall element, corresponding to the second rotation angle, and outputting the second rotation angle as a confirmed rotation angle in response to a second difference value between the second magnetic value and the second measured magnetic value becoming less than a delta value.

Claims16

Dependent claims

A rotation angle detecting method of a rotation angle detecting apparatus comprising hall elements and magnetic pieces, the method comprising:

detecting a first rotation angle based on a first measured magnetic value received from a first hall element;
detecting a first magnetic value received from a second hall element corresponding to the first detected rotation angle;
adjusting a gain based on a first difference value between a second measured magnetic value received from the second hall element, in response to one of the magnetic pieces being rotated at the first rotation angle, and the first magnetic value;
redetecting a second rotation angle by applying the gain to the first magnetic value and redetecting a second magnetic value received from the second hall element, corresponding to the second rotation angle;
and
outputting the second rotation angle as a confirmed rotation angle in response to a second difference value between the second magnetic value and the second measured magnetic value becoming less than a delta value.

3 more elements

A rotation angle detecting apparatus comprising:

magnetic pieces located in a rotary body;
a hall sensor comprising at least three hall elements configured to measure magnetic values of each of the magnetic pieces;
and
a signal processor configured to
adjust a gain by applying a first measured magnetic value received from a first hall element to a second hall element and detecting a confirmed rotation angle, by
calculating a first magnetic value by applying a first rotation angle detected based on the first measured magnetic value to a second hall element,
adjusting a gain based on a first difference value between the first magnetic value and a second measured magnetic value received from the second hall element, in response to one of the magnet pieces being rotated at the first rotation angle, and the first detected magnetic value, and
outputting the second rotation angle as the confirmed rotation angle based on a comparison result of a second difference value between a second magnetic value redetected based on the gain and the second measured magnetic value with the first difference value.

5 more elements

Dependencies are inferred from the claim text.

Method for detecting angle of rotation using automatic gain adjustment algorithm and apparatus thereof

Life of this patent

Method for detecting angle of rotation using automatic gain adjustment algorithm and apparatus thereof

Life of this patent

Abstract

Claims16