Asee peer logo

Development of a software tool to improve educational outcomes in a time constant measurement experiment

Download Paper |

Conference

2025 ASEE Southeast Conference

Location

Mississippi State University, Mississippi

Publication Date

March 9, 2025

Start Date

March 9, 2025

End Date

March 11, 2025

Conference Session

Professional Papers

Tagged Topic

Professional Papers

Page Count

14

DOI

10.18260/1-2--54207

Permanent URL

https://peer.asee.org/54207

Download Count

22

Paper Authors

author page

Kenneth Marek Mercer University

Download Paper |

Abstract

In a junior level mechanical engineering experimental measurements laboratory course, students perform an experiment in which they determine time constants of various electronic temperature sensors, based on a lumped capacitance heat transfer model. In the past, many students have struggled with the mechanics of calculating the time constant using Microsoft Excel, often spending excess time on it and/or generating erroneous results. While such deficiencies are correctable with additional feedback and instruction, the additional time would come with an opportunity cost of other potential lab activities. It is preferable instead to spend available lab time on other tasks, such as interpreting the meaning of the time constants, and hypothesizing and testing different aspects of the experiment that can affect the calculated time constants. Since these preferred activities necessarily rely on the correct calculation of time constants, a software tool was developed which can be used to more quickly and easily calculate time constants. It is a graphical program which runs on GNU Octave, and it has the capability to import raw data, select subsets of the data to analyze, and calculate the time constant based on the user’s selections. The new tool is designed for use during the laboratory period, so that students can receive feedback on their analysis and correct common mistakes before leaving the laboratory. The tool also calculates time constants several times faster than could be accomplished using Excel, thus reducing the amount of time students must spend calculating time constants and allowing students to collect and analyze many more data sets than they did previously. The new tool also incorporates more graphical interaction and feedback than students experienced with Excel. The ease of use, speed, and new feedback provided by the software tool allows additional improvements to be made to the experiment. These include obtaining a larger number of time constant values, on which to perform better statistical analyses, as well as facilitating additional inquiries into the experimental data on multiple cognitive levels. This paper discusses the purpose, function, and effectiveness of the tool, including estimates of time saved. It also discusses how the additional experimental analysis improvements, made possible by the new software tool, impact student understanding and course learning outcomes.

Marek, K. (2025, March), Development of a software tool to improve educational outcomes in a time constant measurement experiment Paper presented at 2025 ASEE Southeast Conference , Mississippi State University, Mississippi. 10.18260/1-2--54207

ASEE holds the copyright on this document. It may be read by the public free of charge. Authors may archive their work on personal websites or in institutional repositories with the following citation: © 2025 American Society for Engineering Education. Other scholars may excerpt or quote from these materials with the same citation. When excerpting or quoting from Conference Proceedings, authors should, in addition to noting the ASEE copyright, list all the original authors and their institutions and name the host city of the conference. - Last updated April 1, 2015