San Antonio, Texas
June 10, 2012
June 10, 2012
June 13, 2012
25.1248.1 - 25.1248.14
Course Projects with a Focus on Digital Communication ProtocolAbstractIn response to the needs of the power industry, the Electronics Engineering Technology programat _____ University has been revamping the instrumentation course to focus on digitalinstrumentation in particular digital communication protocols.LabVIEW was extensively used in the laboratory sessions, which led to course projects that usedthe Modbus digital communication protocol. Two course projects were designed to familiarizethe students with virtual instrumentation, data acquisition, Modbus communication, and simpleclosed loop control. One involved the instrumentation and control of a brushed DC permanentmagnetic motor; the other involved the instrumentation and control of a small scale temperaturechamber. Students used one computer, functioning as a Modbus slave, to measure the motorspeed or temperature inside the chamber and to turn the motor or the light bulbs on and off.Another computer, functioning as a Modbus master, read the measurements using Modbuscommunication protocol via RS-485 wires, compared the measurements to the set points, madecontrol decisions, and sent the commands to the Modbus slave for actuation.After the successful completion of the LabVIEW based control systems, students were thentasked to design a printed circuit board, including a micro-controller on the board, to replace theLabVIEW based Modbus slave. Instead of using National Instrumentation’s Data AcquisitionCard (DAQ card), sensor circuits, signal conditioning circuits, and a micro-controller were usedfor data acquisition, Modbus communication, and controlling of the motor or light bulbs.Details of the course projects will be discussed in this article.As an effort to continually improve our education program, the effectiveness of the courseprojects has been quantitatively and qualitatively monitored through student and faculty surveys,feedback from former students, and results of examinations.
Zhan, W., & Morgan, J. A., & Porter, J. R. (2012, June), Teaching Digital Communication using LabVIEW Paper presented at 2012 ASEE Annual Conference & Exposition, San Antonio, Texas. https://peer.asee.org/22005
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