The document discusses biomechanical energy harvesting, which involves generating electricity from human movement. It introduces three methods: compressing shoe soles, using a spring-loaded backpack, and a biomechanical energy harvesting system. The biomechanical system harvests energy from walking with little extra effort using springs engaged by muscle activity. It generates 7W of power continuously and 5W in generative braking mode, with a cost of harvesting of only 2.3 and 0.7 respectively. The technology could potentially power portable devices and assist muscles during walking.

1. Biomechanical Energy Harvesting
BIOMECHANICAL
ENERGY HARVESTING
WELCOME
A presentation by:
THOMASKUTTY JOSEPH
S7.B
ROLL NO. 51
Index Introduction
 Introduction
 Human based energy harvesting  Humans are rich source of energy
 Comparisons
 Biomechanical energy harvesting
 Structure of device
 Walking mechanics
 Cost of harvesting
 Power generation comparison
 COH comparison
 Future scope
 Conclusion  These devices are ordinary called human based energy
harvesting systems
Human Based Energy Harvesting The Compression of the Shoe Sole
 The compression of the shoe sole
 The spring-loaded backpack
 Biomechanical Energy Harvesting System
College of Engg: Chengannur thomask_j@yahoo.co.in

2. Biomechanical Energy Harvesting
The spring-loaded backpack Biomechanical Energy Harvesting system
Advantages
 Walking is everyday human activities
 Little extra effort
 Light in weight
 High efficiency
The Structure of Device Walking Mechanics & Muscle Activity
Cost of Harvesting (COH) Power Generating Comparison
 “A dimensionless quantity defined as the  The compression of the shoe sole
additional metabolic power in watts required to  0.8 W
1
generate W of electrical power”  The spring-loaded backpack
 7.4 W
 Biomechanical energy harvesting
 COH= ∆ Metabolic _Power
 7 W (continuous generation mode)
∆ Electrical _ Power
 5 W (generative breaking mode)
College of Engg: Chengannur thomask_j@yahoo.co.in

3. Biomechanical Energy Harvesting
COH Comparison Future Scope…
 The compression of the shoe sole  The future versions of this technology may prove useful to
 ??? (bigger than 2 other mode) the general public for powering their portable devices
 The spring-loaded backpack  The key principles are considerably more general than the
 6.4 current embodiment—energy harvesters that operate about
body joints and selectively engage power generation have
 Biomechanical energy harvesting the potential to improve the quality of life for the user
 2.3(continuous generation mode) without increasing their effort.
 0.7(generative breaking mode)
Conclusion References
 Biomechanical energy harvesting generates electricity  J. M. Donelan, Q. Li, V. Naing, J. A. Hoffer, D. J. Weber,
during human walking with little extra effort and A. D. Kuo, "Biomechanical energy harvesting:
generating electricity during walking with minimal
 This technology assists muscles in performing negative
user effort," Science, vol. 319, pp. 807-10, Feb 8 2008.
work  T. Starner and J. A. Paradiso, "Human generated power
for mobile electronics," in Low-power electronics
design, C. Piguet, Ed. Boca Raton: CRC Press, 2005.
 The efficiency is bigger than other conventional power
 www.technovelgy.com
generator
 www.tutor4physics.com
 www.engadget.com
THANK YOU…
College of Engg: Chengannur thomask_j@yahoo.co.in