TY - GEN
T1 - Porous Triboelectric Nanogenerator to Enhance Self-powered Load Monitoring of Total Knee Replacement
AU - Mahmoudi, Elham
AU - Redgrift, Adam Garry
AU - Salman, Emre
AU - Stanacevic, Milutin
AU - Willing, Ryan
AU - Towfighian, Shahrzad
N1 - Publisher Copyright:
© 2025 SPIE.
PY - 2025
Y1 - 2025
N2 - Developing self-powered, durable pressure sensors for Total Knee Replacement (TKR) enhances longevity, ensures consistent performance, and provides critical post-operative information. This study presents a triboelectric nanogenerator (TENG) integrated into an instrumented knee implant for energy harvesting and pressure sensing. Operating in vertical contact mode, it utilizes porous silicone rubber (SR) dielectric to improve electrical stability, and mechanical durability. The nanogenerator divides the tibial tray into two compartments for load imbalance detection. Tests simulating human walking showed the device withstands forces up to 2200N, generating a maximum of 18µW at 1Hz under harmonic load and a maximum of 7.5µW at 0.8Hz under gait loading with a VIVO joint simulator. The performance of the TENG was stable over 3000 cycles generating a peak-to-peak voltage of 350V . The porous structure enhances charge trapping, energy storage, and system efficiency. The increased power compared to previous work enhances energy harvesting capability and strengthens its potential for self-powered, real-time load monitoring at the knee joint.
AB - Developing self-powered, durable pressure sensors for Total Knee Replacement (TKR) enhances longevity, ensures consistent performance, and provides critical post-operative information. This study presents a triboelectric nanogenerator (TENG) integrated into an instrumented knee implant for energy harvesting and pressure sensing. Operating in vertical contact mode, it utilizes porous silicone rubber (SR) dielectric to improve electrical stability, and mechanical durability. The nanogenerator divides the tibial tray into two compartments for load imbalance detection. Tests simulating human walking showed the device withstands forces up to 2200N, generating a maximum of 18µW at 1Hz under harmonic load and a maximum of 7.5µW at 0.8Hz under gait loading with a VIVO joint simulator. The performance of the TENG was stable over 3000 cycles generating a peak-to-peak voltage of 350V . The porous structure enhances charge trapping, energy storage, and system efficiency. The increased power compared to previous work enhances energy harvesting capability and strengthens its potential for self-powered, real-time load monitoring at the knee joint.
KW - Biomedical Sensor
KW - Energy harvesting
KW - Porous silicone rubber
KW - Self-powered sensors
KW - Total knee replacement
KW - Triboelectric nanogenerator
UR - https://www.scopus.com/pages/publications/105014735927
U2 - 10.1117/12.3052525
DO - 10.1117/12.3052525
M3 - Conference contribution
AN - SCOPUS:105014735927
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Health Monitoring of Structural and Biological Systems XIX
A2 - Su, Zhongqing
A2 - Peters, Kara J.
A2 - Ricci, Fabrizio
A2 - Rizzo, Piervincenzo
PB - SPIE
T2 - Health Monitoring of Structural and Biological Systems XIX 2025
Y2 - 17 March 2025 through 20 March 2025
ER -