The flexible sensor-based human motion capture system is used to evaluate the effectiveness of a low-back passive exoskeleton. The results discern the effects of the exoskeleton, including increased peak lumbar flexion, decreased peak hip flexion, and decreased lumbar flexion moment and back muscle activities. A paper describing this work is published in Ergonomics.

A miniaturized flexible inertial sensor is utilized to capture human motion with a novel algorithm. The left video shows a simulated lower body (presented by red linkages) motion using my proposed method. A paper describing this work is published in Ergonomics.

This project aims to develop a smartphone-based approach to evaluate the balance of older people in the community. We use two smartphones to capture and analyze subjects' specific motions (including Sit-to-Stand and Timed-Up-and-Go): one phone is placed on the human sternum to capture the trunk motion data using its Inertial Measurement Unit (IMU), while the other one is mounted on a tripod to record videos of the motion. OpenPose is utilized to extract the human body key markers from the videos, which will then be integrated with the IMU data to analyze the subject's balance.  

A first-of-its-kind study that integrates a gamut of state-of-the-art imaging modalities (dynamic radiography, computed tomography (CT), and magnetic resonance imaging (MRI)) and biodynamic measurements (motion capture, electromyography (EMG), force sensing) is established to investigate holistically the in vivo responses of the neck and its various interconnected musculoskeletal components during functional activities. Subject-specific neck models are constructed accordingly. Click here to learn more. 

A novel alignment-free algorithm is developed for the flexible sensors to enable ambulatory gait kinematics measurement. This study also evaluates the sensor placement strategy and a lateral thigh placement is suggested by the results. Click here to learn more. 

This project will develop a fall evaluation (left) and rehabilitation (right) system with specialized footplates equipped with force-plates and the ability to generate antero-laterally (A-L), postero-laterally (P-L), antero-posteriorly (A-P), and mediolaterally (M-L) balance perturbations during walking on the ground (left) and stepping on the elliptical trainer (right). The devices will be used to investigate individual fall mechanisms and conduct subject-specific fall prevention training.