mobiLLD: Exploring the Detection of Leg Length Discrepancy and Altering Gait with Mobile Smart Insoles Denys J.C. Matthies, Don Samitha Elvitigala, Annis Fu, Deborah Yin, and Suranga Nanayakkara 1Technical University of Applied Sciences Lübeck, Germany 2Augmented Human Lab, Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand
[email protected] 2{samitha,annis,deborah,suranga}@ahlab.org, Measured Detect LLD with Inertial Measurement Units Gait Parameters ~23% Pressure-Sensitive Insoles of the world population suffer of significant Leg Length Alter Gait Stance Time Ground Reaction Center of Pressure Discrepancy using Vibrotactile Feedback Force Figure 1: A vast group of people, ~23% of the world population, suffers from significant Leg Length Discrepancy (LLD)of 10mm or more [35]. This condition causes uneven gait, often resulting in health issues, including spinal pain and headache. We explore the detection of LLD using a mobile smart insole system. We use Inertial Measurement Units (IMU) and pressure- sensitive insoles to measure gait parameters, such as Stance Time, Ground Reaction Force (GRF), and Center of Pressure (CoP). To alter asymmetrical gait, we augment vibrotactile feedback under the foot. ABSTRACT ACM Reference Format: Leg length discrepancy (LLD) is common and typically burdens Denys J.C. Matthies, Don Samitha Elvitigala, Annis Fu, Deborah Yin, and Suranga Nanayakkara. 2021. mobiLLD: Exploring the Detection of Leg the spine and hip causing a variety of health issues including back Length Discrepancy and Altering Gait with Mobile Smart Insoles. In The pain and headache. Common orthopaedic solutions target correct- 14th PErvasive Technologies Related to Assistive Environments Conference ing gait, typically by shoe lifts.