Sang Ku Kang

US Patent:

20120277063, Nov 1, 2012

Filed:

Apr 26, 2012

Appl. No.:

13/456239

Inventors:

Li-Qun Zhang - Wilmette IL, US
Sang Hoon Kang - Chicago IL, US

Assignee:

REHABTEK LLC - Wilmette IL

International Classification:

A63B 24/00

US Classification:

482 8

Abstract:

A real-time estimation of 3D moments of lower-limb joints using a robotic multi-axis training system with a 6-axis force/torque (F/T) sensors and a 6-DOF goniometer is described. A joint moment such as the knee abduction moment (KAM) can be determined in real-time without using sophisticated optoelectronic motion tracking system. The system also does not require computation of the COP location. The knee adduction moment or any other lower-limb 3D joint moments can be determined conveniently during stepping movement on the training system for real-time biofeedback training on controlling the targeted joint moment(s). The 6-DOF goniometer is convenient to use with other analog signals including the 6-axis F/T and locomotion variables. As an example application, combined with the frontal plane movement on the robotic multi-axis elliptical trainer, it provides a useful tool suitable for clinical setting to help patients with knee OA to reduce potentially damaging peak knee adduction moment through real-time feedback training.