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Gather System of Grating Ruler Subdivision Based on PCI Bus and CPLD

Author: WangChangQian
Tutor: CheYing
School: Changchun University of Science and Technology
Course: Measuring Technology and Instruments
Keywords: Grating subdivision PCI bus CPLD
CLC: TP274.2
Type: Master's thesis
Year: 2009
Downloads: 214
Quote: 1
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Abstract


The grating is widely used in the field of modern precision measurement displacement sensor , in particular, plays an important role in the measurement of linear displacement and angular displacement . The grating is based on the principle of Mohr provisions , the measurement accuracy is proportional to the grid density by grating ruling process and photoelectric conversion device volume grating resolution is difficult to have greatly improved , so by subdivision technology the best way to improve the measurement accuracy of the grating . The design list and compare the advantages and disadvantages of the various segmentation method , using a combination of hardware and software orthogonal subdivision method to achieve the scale subdivision . This article describes the scale works , grating subdivision method , and the phase grating technology , a detailed study and analysis of the PCI bus communication protocols , designed based on the PCI bus interface chip CH365 PCI bus interface bridge . The design and preparation of the PCI bus interface card driver under Windows . CPLD is used in the design of digital logic circuits , effectively reduce PCB area , and to improve the circuit portability and stability . This design can be achieved grating phase difference of 90 ° square wave signal segmentation, sinusoidal signal 200 subdivision , slightly modified to achieve a variety of segmentation .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system > Data collection and processing systems
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