College - Author 1
College of Engineering
Department - Author 1
Biomedical Engineering Department
Degree Name - Author 1
BS in Biomedical Engineering
College - Author 2
College of Engineering
Department - Author 2
Biomedical Engineering Department
Degree - Author 2
BS in Biomedical Engineering
College - Author 3
College of Engineering
Department - Author 3
Biomedical Engineering Department
Degree - Author 3
BS in Biomedical Engineering
Date
6-2025
Primary Advisor
Iian Black, College of Engineering, Biomedical Engineering Department
Abstract/Summary
Technology relating to upper-limb amputations has seen many advances in recent years, especially in terms of function and aesthetic appeal. Although these improvements exist, comfort is often a primary concern among prosthetic users and can lead to prosthetic abandonment [1]. Without a standardized method of measuring force concentrations in patients, high rates of discomfort and potential tissue damage remain. The goal of this project is to create a force mapping system for upper-limb amputees to help minimize discomfort in socket fit during the fitting process using real-time data and software to view force concentrations. To accomplish this goal, background research to discover the clinical relevance was performed, as well as a review of existing technologies. Customer requirements were identified through a combination of research and conversations with the project sponsor. Comfort, cost, repeatable use, identification of force concentrations and the ability to acquire data in real time were identified as the most important customer requirements. Engineering specifications were translated from the list of customer requirements; the most important specifications were identified as the measurement of normal force, cost, the data refresh time, and weight. A morphology was created to assess the function and form of the device and combine preliminary ideas into a single table. Decision making tools such as a Pugh Matrix and Failure Mode and Effects Analysis were used during the conceptual design phase to finalize a conceptual model. The project timeline was structured using a Gantt Chart. The final critical design was outlined, accompanied with calculations, finite element analysis, material selection, and sensor specifications. Manufacturing processes were outlined including materials and components, with a populated bill of materials. The manufacturing processes were followed to develop an initial prototype for demonstration. Test plan protocols were then developed and discussed in detail with specifications in regards to expected results and pass criteria. A functional test was performed to ensure that the wand could consistently detect imperfections and bumps consistently while also verifying that it does not give false readings. It was determined through this test that there was less than a 10% deviation in force values, therefore passing the test. After the completion of testing, the results were analyzed and the consequences of testing were discussed. It was discovered through the sensor temperature test that an increase in sensor temperature causes less than a 10% deviation in force values, therefore passing the test. The instructions for the use of the device were also outlined in detail. Lastly, discussions and conclusions from the design process were included to reflect upon the project. Using all of these tools, this project aims to create a novel method in which the lives of upper-limb amputee patients can be improved. With adaptive and lightweight technology, this device has the potential to improve current methods of prosthetic fitting.
URL: https://digitalcommons.calpoly.edu/bmedsp/227