Underfoot Pressure Measurement System While Walking with a Pressure Sensor

Abstract

This research is a quasi-experimental study with the following objectives: 1) to develop a foot pressure measurement system during walking using efficient pressure sensors as a tool for analyzing the characteristics of weight distribution under the feet, and 2) to create a standard graph for comparing the characteristics of weight distribution under the feet during walking. The sample groups consist of: 1) the target group selected through purposive sampling from individuals with normal foot structure and normal weight-bearing while walking, wearing shoes equipped with pressure measurement devices. There are a total of 5 participants in this group, and their data is used to create the standard graph. And 2) the general population group selected through simple random sampling from individuals who are capable of wearing shoes with pressure measurement devices. There are a total of 3 participants in this group, and they are used to evaluate the system's performance. The research process includes: 1) Designing the system using force sensors and microcontrollers to measure pressure, 2) Developing devices and software to ensure the system operates efficiently with a tolerance of ±5%, 3) Creating standard graphs for comparing the pressure distribution during walking, using the system on the target group, and 4) Evaluating the system's performance by applying it to a general population. The research findings revealed that: 1) The system for measuring pressure under the feet while walking, using sensor-based force measurement, proved to be effective for the research objectives. It was able to accurately measure and analyze pressure values and present the results in graph format, with deviations within the specified criteria. 2) The generated standard graph allowed for a comparison of the distribution of pressure under the feet during walking. Any position where the pressure deviated significantly from the standard graph indicated higher-than-normal pressure, which could potentially lead to foot injuries.