Desarrollo de un sistema prototipo para la adquisición, registro y visualización de la marcha humana en miembros inferiores mediante sensores inerciales.

Abstract

The objective of the Curricular integration research project was to develop a prototype system for the acquisition, registration, and visualization of human walking in lower limbs through the use of inertial sensors. The construction process of the Lower Limb Data Acquisition System (LLDAS) was carried out in stages: planning, designing, implementation, and testing. A study of the necessary considerations for analyzing the prototype's walking, software, and hardware requirements was carried out. Six sensor nodes were designed and implemented, which are responsible for registering the extension and flexion angles generated when walking and are transmitted through Wi-Fi communication technology. The base station is responsible for receiving the information, decoding, and presenting it on the GIEBI-ESPOCH intranet web page; the user interacts through a graphical interface in which the information is displayed with characteristic displacement curves and a 3D humanoid avatar that replicates the movements. From the tests carried out, it was determined that the prototype presents a maximum error of 0.69% in the data reading, a coefficient of variation of 1.29% is estimated, determining the system stability, with communication reliability of 100% within the laboratory area, the autonomy of the equipment of 235.56% more than the required time and represents 5.37% of the financial devices investment developed in similar investigations. It is concluded that LLDAS meets the requirements and can be used as an alternative tool for quantitatively registering human walking parameters by specialists. It is recommended to study the possibility of miniaturizing the prototype developed to be incorporated into clothing to avoid influencing the person's natural mobility during the tests and minimize the information errors that may occur.