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Design, Development, and Testing of Load Cell Accelerometers

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Conference

2018 ASEE Annual Conference & Exposition

Location

Salt Lake City, Utah

Publication Date

June 23, 2018

Start Date

June 23, 2018

End Date

July 27, 2018

Conference Session

Instrumentation Division Technical Session 2

Tagged Division

Instrumentation

Page Count

13

Permanent URL

https://peer.asee.org/30272

Download Count

35

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Paper Authors

biography

Dale H. Litwhiler Pennsylvania State University, Berks Campus

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Dale H. Litwhiler is an Associate Professor at Penn State, Berks Campus in Reading, PA. He received his B.S. from Penn State University, M.S. from Syracuse University, and Ph.D. from Lehigh University all in electrical engineering. Prior to beginning his academic career, he worked with IBM Federal Systems and Lockheed Martin Commercial Space Systems as a hardware and software design engineer.

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Abstract

As part of an instrumentation and measurement theory course for third-year Mechanical Engineering students, accelerometers were produced using a mini load cell beam (100 grams max) as the sensing element. The students worked in small teams to design, develop, and test a custom accelerometer with a measurement range of ±4g. Although using a load cell does not represent a practical approach to modern accelerometer design, it does provide a means for investigating many of the design considerations and concepts required to understand accelerometer operation. The students were given specifications for the accelerometer and made design tradeoffs and decisions to meet the requirements. Students were also required to develop and implement a test procedure to verify specification compliance. A modest budget was provided to allow the design teams to purchase materials. The campus machine shop is very well equipped and staffed and was available to help fabricate custom parts. 3-D printing of parts was also an option for the teams to use. An instrumentation amplifier circuit board kit was available for the students to integrate into their design. The project provided a very good means of unifying many aspects of the course. The fabrication experience gained through this project is also a valuable component of the mechanical engineering curriculum. This paper presents examples of student accelerometer designs and data from prototype testing. Equipment and methods used to test the prototypes are also presented and discussed.

Litwhiler, D. H. (2018, June), Design, Development, and Testing of Load Cell Accelerometers Paper presented at 2018 ASEE Annual Conference & Exposition , Salt Lake City, Utah. https://peer.asee.org/30272

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