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Design of Equivalent Equipment for External System on a Measurement System

Author: ZhangPengFei
Tutor: CuiYongJun；ShenSanMin
School: University of North
Course: Measuring Technology and Instruments
Keywords: Equivalent Equipment FPGA USB Electromagnetic Compatibility
CLC: TP274
Type: Master's thesis
Year: 2011
Downloads: 51
Quote: 1
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Abstract


Equivalent Equipment for External System mainly used for playing on Missile Control , platforms, velocity top, servo system and measurement system interface, resulting in the signal of analog, digital and switch command, used to simulate the data of external systems in laboratories, assembly plants, and technical positions and coordinate with measurement system to test the system data .Equivalent Equipment for External System belong to the automatic test systems, We propose the design of Equivalent Equipment for External System through understanding the status and the trends of ATS at home and abroad and analyzeing the function and indicators of the measurement system . In the system, FPGA is the central controller, USB interface is used to do the data transmission, RS422 bus is used to communications with the measurement system. as the interface. The system mainly consist of computer control software , hardware platform and Peripheral Cables. The computer control software is the virtual instrument panel of the system, which completes human-computer interaction and the receiving &sending of data.While the hardware platform system is mainly used for sending and receiving the data of A variety of digital and analog signals, external cables for connecting devices with the measurement system is used to realize the data communication between external system and measurement systems.The design project of the whole system, the realization principle of each functional module, as well as various problems encountered in designing process and the corresponding steps are analyzed and discussed thoroughly. In the program design, we change out of unreasonable design through rigorous analysis and discussion of all aspects .In the hardware design,through performancing analysis of the chip ,we taken effective measures to prevent misuse of the system.This thesis makes analysis against possible problems of electromagnetic compatibility in the circuit board,finally provides the design method of EMC to PCB.From the docking test between Equivalent Equipment for External System and measurement system,the results show that the system works normally, and the function of indicators meet the system requirements too.

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