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Rotor surface magnetic detection method for simultaneously collecting magnetic field data and position data

A technology of magnetic field data and simultaneous acquisition, applied in the direction of measuring device, measuring magnetic variable, converting sensor output, etc., can solve the problem of inability to provide the corresponding relationship between magnetic field data and position data, and achieve the effect of low cost and high precision

Active Publication Date: 2019-12-20
麦格雷博电子(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking the acquisition rate of 10K / S as an example, if a buffer area of ​​1k is set, an interrupt signal will be sent when 0.5K data is "half full" collected, that is, 10K / 0.5k=20 interrupts can be generated per second , That is, an interrupt will be generated every 50ms. The software reads the position data during the interrupt processing. The position data read each time can only correspond to 0.5k magnetic field data, and it still cannot provide high-precision correspondence between magnetic field data and position data.

Method used

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  • Rotor surface magnetic detection method for simultaneously collecting magnetic field data and position data
  • Rotor surface magnetic detection method for simultaneously collecting magnetic field data and position data
  • Rotor surface magnetic detection method for simultaneously collecting magnetic field data and position data

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Embodiment 1

[0035] Preferably, the position data acquisition unit is an incremental encoder, the output signal lines of the incremental encoder are A+, A-, B+, B-, Z+, Z-, and the incremental encoder A+, The position data signals output by A-, B+, B-, Z+, and Z-, in this embodiment, the A, B, and Z phase signals of the incremental encoder are collected as digital signals, and the increments are collected using the IO interface of the single-chip microcomputer Type encoder A, B, Z phase signal (each signal has only two possibilities of 0 or 1, only occupies one data bit, 8 data bits in one byte are enough, and the extra bits can be empty or Fill in 1 value or 0 value), the 3-byte 24-bit data corresponding to the magnetic field data is bound together, and a 4-byte 32-bit data packet is used to represent the one-to-one correspondence between a magnetic field and a position. Therefore, the amount of data in this way is relatively small, and because the DMA mode cannot be used, only one AD con...

Embodiment 2

[0037] Preferably, the position data acquisition unit is an incremental encoder, the output signal lines of the incremental encoder are A+, A-, B+, B-, Z+, Z-, and the incremental encoder A+, The position data signal output by A-, B+, B-, Z+, Z-, and the position data signal output by the incremental encoder is collected as an analog signal, and the incremental encoder A, B, Z and the magnetic field are collected at the same time The data signal has 4 channels of analog signals (24-bit AD converter, each data occupies 24 data bits, which is 3 bytes). Since A+ and A-, B+ and B-, Z+ and Z- are differential signals, A+ is the inversion signal of A-, B+ is the inversion signal of B-, and Z+ is the inversion signal of Z-, then A+ and A - indicates the same pulse signal, B+ and B- indicate the same pulse signal, Z+ and Z- indicate the same pulse signal, among the above 4 analog signals, there are actually 4 analog signals of A+, B+, Z+ and magnetic field data signals, or A-, B-, Z-...

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Abstract

The invention discloses a rotor surface magnetic detection method for simultaneously collecting magnetic field data and position data. The method comprises the following steps: setting a position dataacquisition unit; adjusting the rotational speed of a rotor, and carrying out position data acquisition and magnetic field data acquisition; correspondingly binding the magnetic field data and the position data to form a data packet; and transmitting the data packet to application software for unbinding, calculating position data corresponding to each magnetic field data, obtaining a rotor angleposition value corresponding to each magnetic field value, and determining a corresponding relationship between each magnetic field and the position. According to the method, an incremental encoder isarranged on a rotating mechanism to output the position data, an AD conversion chip is used for correspondingly binding the received magnetic fields and the position data and then sending the magnetic fields and the position data to the application software to unbind the data according to a binding sequence, the position data are analyzed, the corresponding relationship between the magnetic fielddata and the position data is obtained, synchronous acquisition of the magnetic field data and the position data of the rotor is realized by a Gauss meter, the acquisition speed is not influenced, and the method is low in cost and high in precision.

Description

technical field [0001] The invention relates to the field of surface magnetic detection of motor rotors, in particular to a rotor surface magnetic detection method for simultaneously collecting magnetic field data and position data. Background technique [0002] In the prior art, the Gauss meter collects magnetic field data and position data separately. In application scenarios such as permanent magnet motor rotor surface magnetic detection, a high-precision correspondence between the magnetic field data and the probe position is required. It is hoped that the collected Each magnetic field data obtained can correspond to a specific position data. However, the two solutions commonly used in the prior art are difficult to achieve one-to-one data correspondence: [0003] 1. The gauss meter collects magnetic field data, and the motion control card provides position data. Because the magnetic field data and position data come from two different hardware modules, the computer nee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/07G01R33/00G01D5/245
CPCG01D5/2451G01R33/0023G01R33/07
Inventor 彭林玉明进舒克茂
Owner 麦格雷博电子(深圳)有限公司