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Absolute encoder subdivision acquisition system and measurement method thereof

An absolute encoder and acquisition system technology, applied in the encoder field, can solve problems such as low reliability, high cost, and long cycle, and achieve the effects of improving redundancy and reliability, low development cost, and improving resolution

Inactive Publication Date: 2016-06-01
浙鲁(枣庄)现代智慧农业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited volume of the reading head of the encoder, a special optical amplification system must be designed, and the development of the optical amplification system has the disadvantages of high cost and long cycle. less reliable

Method used

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  • Absolute encoder subdivision acquisition system and measurement method thereof
  • Absolute encoder subdivision acquisition system and measurement method thereof
  • Absolute encoder subdivision acquisition system and measurement method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] refer to figure 1 , a subdivision acquisition system of an absolute encoder, including a parallel light source 1, an indicating grating 2, a standard grating 3, a photodetector module 4 and a signal processing module 5, the standard grating 3 adopts a grating scale, and the standard grating 3 is equipped with There are incremental code tracks 31 and absolute code tracks 32, indicating that the grating 2 is provided with a grating track 21 corresponding to the incremental code track 31 and an opening part 22 corresponding to the absolute code track 32, and the parallel light emitted by the parallel light source 1 The light beam is transmitted through the indicating grating 2 and the grating ruler in turn and reaches the photodetector module 4. The photodetector module 4 collects the arriving optical signal and converts it into a measurement electrical signal and then sends it to the signal processing module 5. After the signal is processed, the absolute position value an...

Embodiment 2

[0065] The difference between this embodiment and Embodiment 1 is that the standard grating 3 adopts a circular encoder 3a, refer to Image 6 , a subdivision acquisition system of an absolute encoder, including a parallel light source 1, an indicating grating 2, a circular encoder 3a, a photodetector module 4, and a signal processing module 5, and the circular encoder 3a is provided with an incremental code track 31 and the absolute code track 32, indicating that the grating 2 is provided with a grating track 21 corresponding to the incremental code track 31 and an opening 22 corresponding to the absolute code track 32, and the parallel light beam emitted by the parallel light source 1 passes through a dichroic prism 6 After the light is split and incident on the circular encoder 3a for reflection, the resulting reflected light passes through the beam splitting prism 6 and the indicating grating 2 in turn and then reaches the photodetector module 4. The photodetector module 4 c...

Embodiment 3

[0070] A measurement method for a subdivision acquisition system of an absolute encoder, comprising:

[0071] S1. Install the standard grating 3 on the object to be measured, and drive the object to be measured to move;

[0072] S2. The parallel light beams emitted by the parallel light source 1 reach the photodetector module after passing between the incremental code track 31 and the grating track 21, between the absolute code track 32 and the opening part 22; the incremental code track 31 and Between the grating track 21, between the absolute code track 32 and the opening part 22, the joint effect on the parallel beam depends on the position between the incremental code track 31 and the grating track 21, between the absolute code track 32 and the opening part 22 The sequence is divided into transmission through the grating track 21 and the incremental code track 31 in sequence, transmission through the opening part 22 and the absolute code track 32 in sequence, and transmiss...

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Abstract

The invention discloses an absolute encoder subdivision acquisition system and a measurement method thereof. The system comprises a parallel light source, an indicating grating, a standard grating, a photoelectric detector module and a signal processing module, wherein the standard grating is provided with an incremental code track and an absolute code track; the indicating grating is provided with a grating ruled orbit corresponding to the incremental code track and an opening part corresponding to the absolute code track; parallel light beams emitted by the parallel light source reach the photoelectric detector module under common effects between the indicating grating and the standard grating; the photoelectric detector module acquires reached light signals, converts the light signals into measurement electric signals and sends the measurement electric signals to the signal processing module; and the signal processing module processes the measurement electric signals, acquires an absolute position value and an incremental position value, checks the absolute position value and the incremental position value and then outputs a position measurement value. The resolution of the absolute encoder can be improved, the redundancy and the reliability of the system are improved, the development difficulty is small, the development cost is low, and the system and the method of the invention can be widely applied to a grating encoder industry.

Description

technical field [0001] The invention relates to the field of encoders, in particular to a subdivision acquisition system of an absolute encoder and a measurement method thereof. Background technique [0002] Encoders used for position measurement are widely used in the machining industry, and their performance affects the quality of machining. At present, the known encoders of tools used to precisely measure the movement displacement of objects mainly include incremental and absolute encoders. Among them, absolute encoders are gradually being used more and more. Its main advantage is that there is no need to find the reference origin, and the position can be measured when the power is turned off after the power is turned off. There is no need for "return to zero" operation, so it has a wide application prospect in CNC machine tools. [0003] Absolute encoders can be divided into absolute circular encoders and absolute grating rulers. The former is an encoder used to detect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00
CPCG01B11/00
Inventor 柴宁王新力廖剑祥
Owner 浙鲁(枣庄)现代智慧农业有限公司
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