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Design and Realization of the Measurement Integrated Automatic Test-Equipment

Author: KongChenJie
Tutor: SuShuJing；ZhangYanJun
School: University of North
Course: Measuring Technology and Instruments
Keywords: Automatic Test FPGA USB Bus CAN Bus
CLC: TP274
Type: Master's thesis
Year: 2011
Downloads: 51
Quote: 2
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Abstract


The measurement integrated automatic test-equipment is designed specially to measure the measurement integrated controller, data transformation unit one and data transformation unit two. It is mainly used to unit testing in producing or debugging, and to inspection the feasibility and performance of the electrical equipment. This test-equipment can provide a variety of signals when testing the electrical equipment, and can acquisition, display, storage, automatic interpretation the data encoded by electrical equipment.According to the specific requirements of system function, the thesis presents the design program in term of the design concept of modularization, divided into the USB bus communication module, CAN bus communication module, digital signals module, analog signals module, PCM code transmission module and power supply module for the system. The system selects the USB bus interface for the data transmission between the hardware and computer, FPGA as the central controller, achievement CAN bus’s reliable communication between node and node, 4-channel digital signal’s correct transmission, 64-channel analog signal’s precision output and PCM code’s no error receive.The thesis introduces circuit and logic-timing design according to the function of each module. It conducts a detail analysis of the key technology which the issue needs to be solved. Including the interference design of communication protocol between USB bus and FPGA, the power isolation design of CAN bus, the redundant circuit design of CAN bus, the different communication rate design of CAN bus, the internal RAM design of FPGA and the anti-electromagnetic interference design of system.The measurement in automatic test-equipment is jointed test with the measurement integrated controller, data transformation unit one and data transformation unit two, have achieved the detection of its performance. Through the analysis of each module’s test results, the test-equipment can meet all mission’s requirements.

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