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Absolute position magnetic encoder of large center hole axial magnetization structure

An axial magnetization, absolute position technology, applied in the direction of instruments, measuring devices, conversion sensor output, etc., can solve the problem that a single position sensor cannot take into account high precision, high reliability and low cost at the same time, and is conducive to wiring, Compact, low-cost and simple structure

Inactive Publication Date: 2016-03-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing single position sensor cannot simultaneously meet the requirements of high precision, high reliability and low cost, and provides an absolute position magnetic encoder with a large central hole axial magnetization structure

Method used

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  • Absolute position magnetic encoder of large center hole axial magnetization structure
  • Absolute position magnetic encoder of large center hole axial magnetization structure
  • Absolute position magnetic encoder of large center hole axial magnetization structure

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specific Embodiment approach 1

[0012] Specific implementation mode one: the following combination Figure 1-Figure 3 Describe this embodiment, the absolute position magnetic encoder with the axial magnetization structure of the large central hole described in this embodiment, the magnetic code disc 1 of the magnetic encoder is a ring structure, magnetized along the axial direction of the ring, and the magnetic code A sensitive chip detection circuit board 4 is arranged in parallel above the disc 1, and the sensitive chip detection circuit board 4 is vertically fixed on the circuit board 5, the circuit board 5 is a ring structure, and the magnetic code disc 1 is located within the ring of the circuit board 5, and , the circuit board 5 is coaxially arranged with the magnetic code disc 1, the magnetic code disc 1 is used as a rotor to rotate under the drive of the motor, the circuit board 5 is used as a stator, and there is a gap of 0.4 mm between the circuit board 5 and the magnetic code disc 1; the magnetic c...

specific Embodiment approach 2

[0017] Embodiment 2: In this embodiment, Embodiment 1 is further described. The inner diameter of the central hole of the circuit board 5 is larger than 25 mm.

[0018] In this embodiment, the central hole with an inner diameter greater than 25mm is beneficial for routing the internal cables of the robot, and can effectively prevent the problem that the internal cables are entangled with each other when the robot is working.

specific Embodiment approach 3

[0019] Specific implementation mode three: the following combination figure 1 Describe this embodiment, this embodiment will further explain Embodiment 1, the main code track 2 of the outer ring is the main code track of 64 pairs of magnetic poles, and the vernier code track 3 of the inner ring is the vernier code track of 63 pairs of magnetic poles.

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Abstract

The invention provides an absolute position magnetic encoder of a large center hole axial magnetization structure, relates to an absolute type magnetic encoder, and aims at solving the problem that an existing single position sensor cannot simultaneously consider high accuracy, high reliability and low cost. A magnetic coded disk of the magnetic encoder provided by the invention is of a circular ring structure, is magnetized along the axial direction of the circular ring, a sensitive chip inspection circuit board is arranged parallelly above the magnetic coded disk and is vertically fixed on a circuit board which is of a circular ring structure, the magnetic coded disk is located within the circular ring of the circuit board, besides, the circuit board is coaxially arranged with the magnetic coded disk, the magnetic coded disk serving as a rotor rotates under the driving of a motor, the circuit board serves as a stator, and a 0.4mm gap is reserved between the circuit board and the magnetic coded disk; two circles of code channels, namely an outer circle of main code channel and an inner circle of vernier code channel, are uniformly arranged on the outer surface of the magnetic coded disk, the outer circle of main code channel and the inner circle of vernier code channel are mutually misaligned. The absolute position magnetic encoder of the large center hole axial magnetization structure is used in a robot control system.

Description

technical field [0001] The invention relates to an absolute magnetic encoder. Background technique [0002] In the robot control system, in order to control the motor, a position sensor is needed to provide the position information of the rotor. With the development of science and technology, the requirements for position detection in various fields are constantly increasing, and the traditional position sensor can no longer meet the special requirements of some application fields due to its own characteristics. For example, the resolver is large in size and low in precision, so it cannot be widely used in occasions where the volume of the position sensor is strict and the control precision is high. Although the photoelectric encoder has high precision and small size, it cannot Poor, unable to work in harsh environments such as dust and humidity, thus greatly limiting its application; although the magnetoresistive encoder basically overcomes the defects of the photoelectric...

Claims

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Application Information

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IPC IPC(8): G01D5/249
CPCG01D5/249
Inventor 倪风雷史士财刘宏
Owner HARBIN INST OF TECH
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