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Design of Grating Signal Acquisition & Processing Card Based on Programmable Logic Device

Author: LiJianPing
Tutor: LiuShuGui
School: Tianjin University
Course: Measuring Technology and Instruments
Keywords: Coordinate Measuring Machine Programmable logic device USB bus Data acquisition
CLC: TH721
Type: Master's thesis
Year: 2007
Downloads: 90
Quote: 1
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Abstract


The programmable logic device gradually replace traditional digital devices become the mainstream chip for digital integrated circuits , it has small size , speed , quality of light , a high degree of security , the development cycle is short , the advantages of small design risk ; fast USB bus has a transfer speed , hot swappable , plug-and-play , easy to expand and occupy less system resources . Increasing requirements of modern industrial production and scientific research , data collection , market demand for programmable logic devices , USB bus technologies with traditional data processing acquisition system characteristics combined developed based on programmable logic devices data processing , data acquisition system based on USB bus . The careful analysis of improvement on the coordinate measuring machine currently used in Tianjin University indigenously developed based on the characteristics of the data acquisition and processing card of the ISA bus , its part of the data processing using programmable logic devices instead of the traditional 74 series chips , can solve lack of welding, lack of weld lead capture card can not work properly , and save PCB board surface resources . USB bus - based data acquisition system is designed to overcome the shortcomings of the traditional data acquisition card based on the ISA bus . The acquisition of the data processing system has a good real-time , high reliability , and easy to use features . Of this work are as follows : the capture card data processing function analysis to determine the design of the whole system ; 2 , read the manual of a large number of chips to determine the model of chip design , draw a circuit diagram of the entire system ; achieve four subdivision to 24 reversible counting the latch signal processing , data strobe function , under in QuartusII environment , using Verilog HDL language programming ; 4 , in Keil uVision2 environment , using C51 language USB internal firmware testing procedures and the preparation of PC -based WDM driver structure in the Visual Studio environment using C language . 5 , in a laboratory environment , developed in their laboratory simulation grating signal occurs card , commissioning the development of data acquisition and processing card to the requirements of the subject .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Coordinates,computer tools,the counter > Coordinates and automatically coordinates
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