HANDLE team, Energy Harvesting Advisor: Prof.Dimitri Peroulis ; Graduate advisor:Abbas Semnani Team Member: Shuozhengyang Wang. Calculation: 1. Simulate the magnetic to a magnetic dipole moment . Use the equation from Wikipedia for the magnetic dipole moment: m is the dipole moment
1. Simulate the magnetic to a magnetic dipole moment.
Use the equation from Wikipedia for the magnetic dipole moment:
m is the dipole moment
is the magnetic constant
r is the distance from the point to the center of a bar. Therefore, in this design, it will be the distance between two legs.
ūĚúÉ is the angle between r and the vertical line.
So here r= 0.2 m ,
is the magnetic constant.
=1.25663706 √ó 10-6¬†m kg s-2A-2
Put the number into the equation,
So, the magnetic field intensity is:
B = 0.022 T
2. Assume when people is standing, the magnetic flux is totally into the metal circle loops, and when the stride reaches the most, magnetic flux is 0. The change of magnetic flux when people‚Äôs walking, is from totally magnetic flux to zero.
‚ąÖ is the magnetic flux, and B is the magnetic field intensity.
ūĚĎÖ‚Ä≤ is the radius of the metal circle loop, and in this design:ūĚĎÖ‚Ä≤ =0.04 m
E is the voltage from the change of magnetic flux.
‚ąÜūĚĎ° is the time change of two legs while walking.n is the number of turns.
=0.5s (for every steps)
P is the power from this electric field. R is the output load, so normally R is 50 ohm.
P=0.05w, -0= 4.84,=0.5s
n=163.34, so n=163
Object: Energy Harvesting
1. Generate power in the order of 10s of mW from everyday activities like walking or working in an office environment2. Power is needed around chest area3 . Inexpensive meaning using either commercially available components and cost-effective manufacturing if custom components are needed.