The Phantom Trailer
Effortlessly
moving loads by bicycle since 2005
The Masterminds:
The Concept:
Though bicycles are superior to automobiles in many
ways, few people use their bicycles to pick up groceries because it is
inconvenient to move heavy loads with a bicycle. We set out to build a self-powered bike
trailer that would address this barrier to bike use.
Using a simple power system, coupled with a
relative-position sensor and feedback control, we built a trailer that
“follows” a bicycle without actually applying any forward or backward force on
the bike or rider.
Design Highlights:
Simple Implementation:
Single sensor
Utilized an existing drive train
P-I controller
High Load Capacity (100lbs of cargo)
Steel Chassis
HD linear bearings
Electronic Braking System
When the sensors indicate that the trailer is too
close to the bicycle, the control system disconnects the motor amplifier and,
using solid-state relays, crosses the motor terminals to activate the
motor-brake system.
Adaptability
System can be made modular
Trailer can easily be converted into a
shopping cart
Integrated into the shopping experience
Valuable components are not left outside
The Result:
Pictures (click on
thumbnail for larger image)
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Movies
