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Device for subdividing sine signal and cosine signal of position sensor and coding data, and implementation method thereof

A data encoding and sensor technology, applied in the detection field, can solve the problems of unsatisfactory adaptability and practicability, difficulty in rapid and wide application, etc., and achieve the effect of improving the accuracy of data reading and detection accuracy

Active Publication Date: 2013-05-01
GSK CNC EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its adaptability and practicability are not ideal, and it is difficult to quickly and widely apply it.

Method used

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  • Device for subdividing sine signal and cosine signal of position sensor and coding data, and implementation method thereof
  • Device for subdividing sine signal and cosine signal of position sensor and coding data, and implementation method thereof
  • Device for subdividing sine signal and cosine signal of position sensor and coding data, and implementation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The present invention subdivides and encodes the sine and cosine signals of the position sensor, such as figure 1 shown, including:

[0056] Encoder, used to output 1Vpp sine differential signal, 1Vpp cosine differential signal and one-cycle signal;

[0057] The first signal conditioning module is used to process the 1Vpp sinusoidal differential signal output from the encoder, filter the input noise, and amplify the signal by 2 times;

[0058] The second signal conditioning module is used to process the 1Vpp cosine differential signal output from the encoder, filter the input noise, and amplify the signal by 2 times;

[0059] The first analog-to-digital converter is used for high-speed sampling of the sinusoidal differential signal from the first signal conditioning module;

[0060] The second analog-to-digital converter is used for high-speed sampling of the cosine differential signal from the second signal conditioning module;

[0061] The first comparator is used ...

Embodiment 2

[0075] by combining figure 1 The device in the specific implementation is as follows:

[0076] 1. The first signal conditioning module and the second signal conditioning module are sine and cosine signal adjustment circuits, using differential input and differential output to the first analog-to-digital converter and the second analog-to-digital converter, and the signal is guaranteed by hardware The ability to suppress noise enables accurate transmission and detection of signals. The first signal conditioning module and the second signal conditioning module amplify the 1Vpp sine-cosine signal of the encoder by 2 times and then send it to the first analog-to-digital converter and the second analog-to-digital converter. Wherein the first signal conditioning module and the second signal conditioning module both use high-precision (full) differential operational amplifiers.

[0077] 2. The sine and cosine signals conditioned by the first signal conditioning module and the secon...

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Abstract

The invention provides a device for subdividing sine signals and cosine signals of a position sensor and coding data, comprising a coder, a first signal conditioning module, a second signal conditioning module, a first analog-to-digital converter, a second analog-to-digital converter, a first comparator, a second comparator, a third comparator, a FPGA (Field Programmable Gate Array) module, a DSP(Digital Signal Processor) module and an output module. The invention further provides a method for subdividing sine signals and cosine signals of the position sensor and coding data. In the method, the multiple interpolation subdivision carried out on the sine signals and cosine signals output by the coder, and detection precision of the position signal is improved to achieve high resolution control and reduce the cost of the high-precision coder.

Description

technical field [0001] The invention relates to a device for detecting, processing and outputting an encoder output signal, in particular to a device for subdividing and encoding data of sine and cosine signals of a position sensor and its realization method. Background technique [0002] The encoder is the core functional part of the measurement system in the numerical control system, and its accuracy affects the control accuracy of the data device. The development of the encoder is from the original incremental square wave output to the sine and cosine 1Vpp signal / absolute value data output, and also from the incremental method to the absolute value method, the resolution is getting finer and the accuracy is getting higher and higher . The encoder sampling square wave output in the early numerical control or measurement system cannot meet the requirements of high-precision position and absolute position. With the development of the machine tool industry, the requirements...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/64G01D5/244
Inventor 杨俊平曾庆明宋师黄扬根
Owner GSK CNC EQUIP
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