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Photo-magnetic hybrid coder

A hybrid, encoder technology, applied in the field of encoders, can solve the problems of insufficient positioning accuracy, poor anti-electromagnetic interference capability, complex sensor technology, etc., and achieve the effect of convenient installation and debugging and thin volume.

Inactive Publication Date: 2015-10-28
CHENGDU EBRIDGE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If only photoelectric sensors are used, it is necessary to set multi-turn code tracks when making absolute encoders or servo encoders, resulting in increased volume and complicated sensor technology
If only the magnetoelectric sensor is used, its positioning accuracy cannot meet the accuracy requirements of the photoelectric encoder. In addition, the magnetoelectric sensor also needs a signal processing circuit for auxiliary use. At the same time, the anti-electromagnetic interference ability of the magnetoelectric sensor is worse than that of the photoelectric sensor. many

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as Figure 1-5 As shown, the present invention includes a rotary motion device 1, a circuit board mounting bracket 2 and an encoder wheel 3. The circuit board mounting bracket 2 is fixed on the stator end surface 11 of the rotary motion assembly 1, and is characterized in that it also includes a photoelectric sensor 22 and a magnetoelectric sensor. Sensor 24, the circuit board mounting bracket 2 is provided with a photoelectric sensor circuit board 21 and a magnetoelectric sensor circuit board 23, the photoelectric sensor 22 is mounted on the photoelectric sensor circuit board 21, and the magnetoelectric sensor 24 is mounted on the magnetoelectric sensor circuit board 23 The code wheel 3 includes two disc surfaces 311 and a wheel surface 31 located between the two disc surfaces 311, the magnetoelectric sensor 24 is arranged on the side of the code wheel disc surface 311, and the axial direction of the code wheel 3 They are perpendicular to each other, and the photoe...

Embodiment 2

[0025] This embodiment is preferably as follows on the basis of embodiment 1: two photoelectric sensors 22 and two magnetoelectric sensors 24. Using two photoelectric sensors to collect the difference information of the photoelectric signals can correct the position deviation collected by a single sensor and improve the accuracy of the encoder; using two magnetoelectric sensors to collect the difference information of the magnetoelectric signals separately can improve the position accuracy of the magnetoelectric sensor , Thereby improving the output bit of the magnetic encoder in the absolute encoder, reducing the number of code channels set by the photoelectric sensor, thereby reducing the volume of the encoder.

Embodiment 3

[0027] This embodiment is preferred on the basis of the above-mentioned embodiments: In order to provide protection and sealing of the internal structure of the encoder, a housing 4 is also fixed on the circuit board mounting bracket 2, and the housing 4 covers the magnetic sensor circuit board 23 and the circuit board Install the entire area between bracket 2.

[0028] At least one code bar ring is arranged on the wheel surface 31 of the code wheel 3, each code bar ring has a plurality of mutually parallel code bars, and any code bar is parallel to the axis of the code wheel 3.

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Abstract

The invention discloses a photo-magnetic hybrid coder, which comprises a rotational motion device, a circuit board installation bracket and a coding wheel, wherein the circuit board installation bracket is fixed at a stator end face of the rotational motion assembly. The photo-magnetic hybrid coder is characterized by further comprising a photoelectric sensor and a magnetoelectric sensor, the circuit board installation bracket is provided with a photoelectric sensor circuit board and a magnetoelectric sensor circuit board, the photoelectric sensor is installed on the photoelectric sensor circuit board, and the magnetoelectric sensor is installed on the magnetoelectric sensor circuit board. The coding wheel comprises two disc faces and a wheel face located between the two disc faces, the magnetoelectric sensor is arranged at the side surface of the disc face of the coding wheel and mutually vertical with the axial direction of the coding wheel, and the photoelectric sensor is arranged in a cavity between the two disc faces of the coding wheel. Through the structure disclosed by the invention, the photoelectric sensor and the magnetoelectric sensor are combined together, defects existing in using the photoelectric sensor or the magnetoelectric sensor independently are overcome through playing the advantages of the magnetoelectric sensor and the photoelectric sensor, and the purposes of size minimization and convenient debugging are achieved.

Description

Technical field [0001] The present invention relates to the field of mechanical manufacturing, in particular to an encoder using both magnetoelectric and photoelectric sensors. Background technique [0002] An encoder is a device that compiles and converts a signal (such as a bit stream) or data into a signal form that can be used for communication, transmission and storage. The encoder converts angular displacement or linear displacement into electrical signals. The former is called a code wheel and the latter is called a code ruler. Encoders can be divided into contact type and non-contact type according to the reading mode; encoders can be divided into two types: incremental and absolute according to the working principle. The incremental encoder converts the displacement into a periodic electric signal, and then converts this electric signal into a counting pulse, and the number of pulses is used to indicate the magnitude of the displacement. [0003] Encoders on the market n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/54
Inventor 吕力
Owner CHENGDU EBRIDGE TECH