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A gear type magnetic encoder based on missing tooth structure

A magnetic encoder and gear-type technology, applied in the field of magnetic encoders, can solve problems such as difficult to control the uniformity of materials, difficult to accurately control the magnetization position, and difficult to further improve the magnetic moment of the code disc and the uniformity of strength and weakness.

Inactive Publication Date: 2019-08-23
CSIC NO 710 RES & DEV INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetic ring is a cylindrical ring structure formed by injection molding, die-casting or casting by ferromagnetic material powder and plastic material as a binder. It is difficult to control the uniformity of the material in the process, and the magnetization position is also difficult. It is difficult to control precisely, making it difficult to further improve the size, strength and uniformity of the magnetic moment on the code disc

Method used

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  • A gear type magnetic encoder based on missing tooth structure
  • A gear type magnetic encoder based on missing tooth structure
  • A gear type magnetic encoder based on missing tooth structure

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Embodiment Construction

[0027] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0028] The present invention provides a gear-type magnetic encoder based on giant reluctance, such as figure 1 As shown, the encoder includes a gear 2 and a magnetic induction read head 1, and the distance between the gear and the magnetic induction read head is 0.1-0.2mm.

[0029] The gear 2 includes normal teeth, as shown in 2-2, and a missing tooth 2-3, and the missing tooth gap 2-4 corresponding to the missing tooth 2-3 is as shown in image 3 As shown, the length of the missing tooth 2-3 is half of the length of the tooth 2-2, and the structure of the normal tooth and the missing tooth is as follows image 3 shown. The center of the gear 2 is provided with a gear center hole 2-1, and the measured rotating shaft passes through the center hole and is installed and fixed with the gear by screws.

[0030] When the gear 2 rotates with the rotating shaft...

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Abstract

The invention provides a gear-type magnetic encoder based on a tooth-missing structure, which can collect the disturbance signal generated by the gear rotating with the shaft to the surrounding magnetic field, and then output the sine wave including the rotational position, speed and zero position of the gear after signal processing Signal. The gear-type magnetic encoder in the present invention adopts a separate design and includes a gear and a magnetic induction read head. It is characterized in that one tooth in the gear is a missing tooth, and the length of the missing tooth is half of the gear tooth; The above-mentioned magnetic induction read head collects the magnetic field variation caused by gear teeth and tooth gaps. The invention provides a gear-type magnetic encoder based on a tooth-missing structure. The encoder adopts a single gear, and the gear is specially designed. There is a tooth missing on the gear used. The gear structure is simple, small in size, low in cost, and easy to install In use, the gears of the magnetic encoder are directly made of silicon steel gears, which have a high protection level and strong resistance to vibration and shock.

Description

technical field [0001] The invention relates to the technical field of magnetic encoders, in particular to a gear-type magnetic encoder based on a tooth-missing structure. Background technique [0002] An encoder is a sensor used to detect the speed, position, angle, distance or count of mechanical motion. With the rapid development of the industrial automation industry, a large number of industrial control equipment such as numerical control and servo systems are used, and the precision requirements of mechanical equipment numerical control With continuous improvement, the types of encoder products continue to increase, and the application ratio has also been greatly improved. The entire market is expanding rapidly. At present, the commonly used encoders mainly include photoelectric encoders and magnetic encoders. [0003] A magnetic encoder is composed of a magnetic induction read head and a magnetic ring. When the magnetic encoder works, the magnetic ring is connected wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/249
Inventor 于晓东窦珂
Owner CSIC NO 710 RES & DEV INST
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