June 22, 2008
June 22, 2008
June 25, 2008
Electrical and Computer
13.548.1 - 13.548.12
Enhancing One Students’ Design Skills in an Electrical Engineering Capstone Senior Design Project by Learning from the Design and Hardware Construction of an Annunciator
This paper reports on the use of the design and hardware building of an annunciator (a temperature monitor device) in a capstone senior design project course to provide an introduction to innovative instrumentation design, development and hardware construction techniques to an electrical engineering undergraduate student. The annunciator system is an excellent student learning tool because its design and implementation develops and enhances students’ knowledge of several interesting and challenging aspects of analog and digital system engineering and signal processing.
Only one student (the co-author of this paper) enrolled in the capstone senior design project course offered in fall semester 2007. For her project, the student applied various hardware design techniques to develop and implement an annunciator for a unit of the State of California Department of Water Resources Harvey O. Banks Water Pumping Plant. Since the water pumping unit already exists, the new student-designed annunciator system is designed to operate in compliance with the current setup of the plant. The student-designed annunciator system is designed to be completely compatible with the 13.8 KV switchgear, and to meet other specific requirements. For example, it is suitable for normal operation at 125 V DC and continuous operation over a range of 100–150 V DC. The annunciator system is programmable and expandable to accept up to four different inputs. It also consists of output signals, such as pushbuttons for testing, acknowledging, and resetting the device.
The dual-alarm annunciator is wired to terminal blocks at the rear of the annunciator, and uses a flashing light device as well as audible alarm horn to make notifications and provide warnings when the monitored oil level and oil temperature in each water pump deviate from a preset range. These warnings are visible in the window display of the annunciator, and are heard by sounding a loud alarm/buzzer. The student installed the new system into the existing electrical prints, which date back to the 1960s. The design was retested and verified by plant engineers before the installation. The annunciator system project provided the student with in-depth knowledge and hands-on experience with designing, developing and testing a sophisticated working system that meets practical real-world engineering requirements, constraints and specifications. The instructor for the capstone design course has suggested similar annunciator design projects to electrical and computer engineering and engineering physics students taking the current (spring semester) offering of the capstone senior design project course, and plans to continue to suggest the project to students in future offerings of the course.
Guzman, R., & Golanbari, M. (2008, June), Enhancing One Students’ Design Skills In An Electrical Engineering Capstone Senior Design Project By Learning From The Design And Hardware Construction Of An Annunciator Paper presented at 2008 Annual Conference & Exposition, Pittsburgh, Pennsylvania. https://peer.asee.org/3122
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