Wireless Measurement System for Real-Time Kinematic Analysis of Human Motion

Kinematics measurement of human body joints and limbs is the estimation of simplified human movements and its positioning. By analyzing the displacement and angular motion of these parts, one can assess the functional performance, physiological parameters, develop prosthetic devices, diagnose joint diseases and health problems related to musculoskeletal as well as understand the biomechanics of human movement. Joint kinematics based on inertial measurement system (IMU) is extensively gaining popularity for research and development. The study focuses on accelerometric based measurement system with Micro electromechanical device (MEMS). The experimental setup is concerned on the design and development of a Wi-Fi based practical compact device integrating MPU 6050 sensor and a ESP32 micro-controller. A web server is created and integrated to get the real time data from the wireless device and designed as such to display the 3-D model and the parameters monitored. Taking a single subject, the experimental setup is concluded with the measurement of acceleration, angular velocity and orientation for knee motion, chest motion and wrist motion. Acceleration and rotational velocity values are plotted across time to illustrate and examine the dynamic changes in the motion characteristics of knee, chest and wrist joints during flexion, extension for knee and wrist and normal breathing function for chest. Researchers can learn more about the kinematics and biomechanics of these joints by observing how acceleration and rotational velocity fluctuate, peak, and change direction throughout motions. It facilitates comprehension of the complex movement patterns, speed fluctuations and dynamic reactions of these joints.