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Calibration method and device for angle encoder

A technology for angle encoders and calibration methods, which is applied in the field of calibration methods and devices for angle encoders, and can solve problems affecting the measurement accuracy of angle encoders, inaccurate working errors, etc.

Active Publication Date: 2014-07-30
HUNAN UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the error of the calibration method of the angle encoder in the prior art is obtained by simple measurement, so the acquisition of its working error is not accurate, which directly affects the measurement accuracy of the angle encoder

Method used

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  • Calibration method and device for angle encoder
  • Calibration method and device for angle encoder
  • Calibration method and device for angle encoder

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Embodiment Construction

[0089] Such as figure 1 As shown, the implementation steps of the calibration method of the angle encoder in this embodiment are as follows:

[0090] 1) The angle encoder to be calibrated is driven by a stepping motor to gradually rotate at a specified angle to complete a rotation of no less than 360 degrees, and the angle encoder to be calibrated is obtained through a high-precision encoder connected to the output shaft of the stepping motor in each The plurality of angle data output from the position of the specified angle is associated with the corresponding position of the specified angle as an angle data group, and finally a plurality of angle data groups respectively corresponding to each position of the specified angle are obtained.

[0091] In the present embodiment, the specific steps of step 1) are as follows:

[0092] 1.1) Regularly collect the angle data output by the angle encoder to be calibrated; at the same time, rotate the angle encoder to be calibrated at a ...

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Abstract

The invention discloses a calibration method and device for an angle encoder. The method comprises the steps that a stepping motor is controlled to rotate by at least 360 degrees step by step, the angle data of the stepping motor after the stepping motor rotates by the appointed angle are collected step by step through a high-precision encoder and the angle encoder to be calibrated so as to obtain a plurality of angle data sets, error factors are initialized, a plurality of error factor sets are generated and serve as particles, and an optimal error factor set is selected as a calibration result to be output according to the particle swarm optimization and the angle data set. The device comprises a host, a stepping motor controller and a base support. The base support is provided with the stepping motor and the high-precision encoder. An output shaft of the stepping motor is respectively connected with the angle encoder and the high-precision encoder. The high-precision encoder and the angle encoder are respectively connected with the host. The stepping motor controller is connected with the stepping motor. The device has the advantages of being high in calibration precision, low in calibration cost, small in needed calibration data size and high in calibration speed.

Description

technical field [0001] The invention relates to high-precision angle measurement technology, in particular to a calibration method and device for an angle encoder. Background technique [0002] Angle sensors used in the automotive and industrial fields mainly include Hall and reluctance angle encoders based on magnetic flux measurement technology, as well as absolute and relative angle encoders based on the photoelectric switch principle. The measurement accuracy of the photoelectric encoder can be very high, but the absolute angle encoder based on the photoelectric principle transmits the absolute angle in the form of code, the processing is more complicated and the cost is higher. Traditional angle encoders based on Hall or reluctance mostly measure the angle by making the gears on the gear plate magnetic, and by collecting the changes in the magnetic field lines brought about by the rotation of the gears. It is difficult to achieve absolute angle measurement, and the inst...

Claims

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Application Information

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IPC IPC(8): G01D18/00
Inventor 王耀南孟步敏申永鹏刘东奇皮钒卢月红
Owner HUNAN UNIV
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