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Calibration method and device for absolute position reference point of rotary encoder

A rotary encoder and absolute position technology, applied in the direction of instruments, etc., can solve the problems of reduced motor control performance and inaccurate absolute position signals, and achieve the effect of suppressing signal interference and ensuring reliability and accuracy

Active Publication Date: 2022-05-20
SHENZHEN HPMONT TECH
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Problems solved by technology

[0006] In view of this, the embodiment of the present application provides a method and device for calibrating the absolute position reference point of the rotary encoder, so as to at least solve the problem in the prior art that the absolute position signal is not accurate enough to cause the motor control performance to decrease

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  • Calibration method and device for absolute position reference point of rotary encoder
  • Calibration method and device for absolute position reference point of rotary encoder
  • Calibration method and device for absolute position reference point of rotary encoder

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Embodiment Construction

[0020] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0021] In order to illustrate the technical solutions described in this application, specific examples are used below to illustrate.

[0022] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude one or more ...

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Abstract

This application is applicable to the field of electrical control technology, and provides a method and device for calibrating an absolute position reference point of a rotary encoder, wherein the method includes: detecting whether the first real-time rotational speed of a motor equipped with a rotary encoder is zero; When the detected first real-time rotation speed is zero, the first absolute position information and the second absolute position information corresponding to the rotary encoder are respectively obtained before and after the preset time interval; if the first absolute position information and If the second absolute position information is the same, the absolute position reference point of the rotary encoder is calibrated based on the first absolute position information. Therefore, the signal interference in the motor operating environment can be effectively suppressed, and the reliability and accuracy of the calibration result can be guaranteed.

Description

technical field [0001] The application belongs to the technical field of electrical control, and in particular relates to a method and device for calibrating an absolute position reference point of a rotary encoder. Background technique [0002] Accurate estimation of linear position and rotational angle is an important task in industrial automation and similar applications, and rotary encoders are widely used in the field of motor control. Rotary encoders (also known as code discs) are electromechanical devices that convert the rotational position or amount of rotation into analog or digital signals. They are mainly used in scientific research, industrial control, robotics and other fields that require precise rotational position and speed feedback. [0003] At present, the rotary encoder feeds back the rotation variation of the shaft and calculates the rotation direction, position and angle information through the output of two quadrature signals with a phase difference of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D18/00
CPCG01D18/00
Inventor 田清和黄章坤张宁郑伟曹力研
Owner SHENZHEN HPMONT TECH
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