With the load resistance set to 1000 , the device was tested
on human participants while they walked and ran on a treadmill.
The vest containing the energy harvester, accelerometer and data
acquisition hardware was fitted to the participant. The treadmill
speed started at 2 mph (3.2 km/h) and the participant was asked
to walk for 1 min while data was collected. The data included the
energy harvester voltage (with load resistor attached), and the
acceleration in the direction the levitating magnet moves. After
2 mph (3.2 km/h), the speed was increased by 0.5 mph (0.8 km/h)
increments until 4 mph, then the increment increased to 1 mph
(1.6 km/h). The participant was asked to go up to whatever speed
they felt comfortable at, but no more than 7 mph (11.3 km/h). A
total of 8 participants had a maximum speed of 7 mph (11.3 km/h)
while 2 had a maximum speed of 6 mph (9.7 km/h). In addition to
collecting the voltage and acceleration,the point at which each participant
switched from a walking gait to a jogging/running gait was
noted.
With the load resistance set to 1000 , the device was tested
on human participants while they walked and ran on a treadmill.
The vest containing the energy harvester, accelerometer and data
acquisition hardware was fitted to the participant. The treadmill
speed started at 2 mph (3.2 km/h) and the participant was asked
to walk for 1 min while data was collected. The data included the
energy harvester voltage (with load resistor attached), and the
acceleration in the direction the levitating magnet moves. After
2 mph (3.2 km/h), the speed was increased by 0.5 mph (0.8 km/h)
increments until 4 mph, then the increment increased to 1 mph
(1.6 km/h). The participant was asked to go up to whatever speed
they felt comfortable at, but no more than 7 mph (11.3 km/h). A
total of 8 participants had a maximum speed of 7 mph (11.3 km/h)
while 2 had a maximum speed of 6 mph (9.7 km/h). In addition to
collecting the voltage and acceleration,the point at which each participant
switched from a walking gait to a jogging/running gait was
noted.
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