Unlock instant, AI-driven research and patent intelligence for your innovation.

Encoder

A technology of encoders and magnetic sensors, applied in the field of encoders, to achieve proper response compensation and improve accuracy

Active Publication Date: 2019-07-05
SANKYO SEIKI MFG CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in reality, the Lissajous waveform may be a circular shape with the center shifted due to sensor deviation, that is, the distance from the intersection point of the Y coordinate and the X coordinate to the circumference of the Lissajous waveform may be different.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Encoder
  • Encoder
  • Encoder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Hereinafter, modes for implementing the invention (hereinafter referred to as "embodiments") will be described with reference to the drawings.

[0033] figure 1 It is a schematic diagram of the hardware configuration of the encoder 1 that performs compensation value correction according to the embodiment of the present invention. figure 2 It is a functional block diagram of the encoder 1, mainly emphasizing the function of compensation and correction.

[0034] The encoder 1 has a control unit 20 and a magnetoresistive element 10 whose output signal changes in conjunction with the rotation of the rotary body. In the present embodiment, a disk-shaped magnet 50 magnetized into a pair of S pole and N pole is used as the rotating body. The magnet 50 is fixed to a frame or the like of the motor device, and is used in a state of being connected to a rotation output shaft or the like of the motor device.

[0035] In the encoder 1 , a Cos signal (A-phase signal) and a Sin si...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a technique for proper response compensation and improved accuracy in an encoder using a magnetoresistive element. The encoder includes a magnetoresistive element (10) and a control unit (20). A control unit (20) includes an ADC (21), an angle calculation unit (22), and a compensation control unit (23). The angle calculation unit (22) acquires the A-phase signal and the B-phase signal from the magnetoresistive element (10) through the ADC (21), and calculates the angular position of the magnet (50). The compensation control unit (23) calculates the Lissajou waveform from the A-phase signal and the B-phase signal, and obtains two consecutive points from predetermined candidate points formed by equally dividing the circular Lissajous waveform. Perpendicular between two points, the point of intersection is calculated as compensation.

Description

technical field [0001] The present invention relates to an encoder, for example, to a magnetic encoder that calculates a rotation angle obtained based on a magnetic sensor output of an A-phase signal and a B-phase signal having a phase difference of π / 2. Background technique [0002] A magnetic linear encoder is known as a device for detecting the amount of displacement and the absolute value of the displacement of an object to be detected. For example, as a magnetic linear encoder, a disk-shaped magnet magnetized to NS poles is rotated, and the change in the magnetic field is detected by a magnetoresistive element, and the obtained Sin signal and Cos signal are AD converted and input to a microcomputer, and the rotation is performed. The absolute value of the position is detected. [0003] In such a magnetic encoder, for example, if the phase of the arctangent signal is used as a parameter, the Sin signal is used as the Y coordinate of the Cartesian coordinate system, and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/244
CPCG01D5/2448G01D5/2449G01D5/12
Inventor 奥村宏克斋藤丰上甲均
Owner SANKYO SEIKI MFG CO LTD