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A data processing method for the blind area of ​​a linear steel belt encoder when measuring angles

A data processing and encoder technology, which is applied in the field of high-precision encoder signal processing to achieve the effects of high angle measurement compensation accuracy, low complexity, and easy real-time online implementation.

Active Publication Date: 2020-01-31
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

Since the center of the rotation axis of the azimuth axis of a large-scale photoelectric telescope has the requirements for transmission optical path and wiring, it is necessary to use a photoelectric encoder with a large inner aperture, which makes the traditional circular optical encoder no longer applicable

Method used

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  • A data processing method for the blind area of ​​a linear steel belt encoder when measuring angles
  • A data processing method for the blind area of ​​a linear steel belt encoder when measuring angles
  • A data processing method for the blind area of ​​a linear steel belt encoder when measuring angles

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Embodiment Construction

[0054]In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0055] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate c...

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Abstract

The invention relates to the field of signal processing of high-precision encoders, in particular to a method for processing blind area data of a linear steel belt encoder when measuring angles, comprising: rotating the linear steel belt shaft system for more than one revolution, and recording the full circle of four encoder reading heads Based on the data, the total code value of the whole circle is initially estimated; based on the continuity of the reading difference of the diameter reading head, the total code value of the whole circle is estimated twice to obtain the final total code value of the whole circle; the reading of each reading head passing through the blind zone The data is corrected according to the final total code value of the whole circle; the corrected reading data of the 4 reading heads are synthesized into an encoder absolute position data. Compared with the existing speed measurement compensation method of the radial reading head, this data processing method considers the situation that the relative relationship of the radial reading head changes, and the angle measurement compensation accuracy is higher, and the data continuity is better. The total code value of the whole circle, the compensation interval and the compensation slope are all calibrated in advance and written into the decoding program of the encoder. The data processing algorithm has low complexity and is easy to realize online in real time.

Description

technical field [0001] The invention relates to a method for processing blind area data when a linear steel belt encoder measures angles, in particular to a method for processing blind area data when a linear steel belt encoder is used for angle measurement of a shaft system of a large-scale photoelectric telescope, and belongs to high-precision encoders the field of signal processing. Background technique [0002] With the development of the field of deep space exploration, the diameter of the ground-based photoelectric imaging telescope is getting larger and larger, and the requirements for the positioning accuracy of the telescope are getting higher and higher, which also puts forward higher requirements for the position feedback sensor-encoder. Since the center of the rotation axis of the azimuth axis of a large-scale photoelectric telescope has the requirements for transmission light path and wiring, it is necessary to use a photoelectric encoder with a large inner aper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/22G01D5/12
CPCG01B21/22G01D5/12
Inventor 杨晓霞王建立王帅邓永停刘洋
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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