User`s guide

17 | P a g e
design was that of a clamp that would be part of one container, holding all the subsystems, which
would have the ability to be engaged and disengaged electronically. This idea was discarded due
to the high amount of power required for the solenoids that it would require as well as the safety
concerns presented if the lock accidently engaged while riding. The second idea was based off
of the boots that are placed on cars; one larger container that would sit on the back of the bicycle
as a luggage rack until needed. The rack would then be placed on the ground and the bicycle
placed on it to lock it. This removed the safety concerns for locking while the bicycle was in
motion but added a lot of bulk and weight to the system. Another idea that was considered was a
small pin that would lock into the hub, or into the spokes of the bicycle to prevent it from being
ridden. This idea was also discarded due to safety concerns and we wished to not edit the frame
of the bicycle. The last and final idea is the design presented in this report. It consists of a
braided cable used for bicycle locks and two different cylinders to lock into. One of the
cylinders will be placed in the circuit housing and be detached using a physical key, this was in
case the battery died and the user needed to remove the lock from a stationary object. The other
cylinder is one housed in a separate casing; this cylinder is fabricated to allow the male cable end
to slide in and become latched. Once the cable is latched it is unable to be removed from the
housing except by extreme measures (breaking the housing or cutting the cable out using a tool
of some sort). This component of the locking mechanism is a bolt that is attached to and held by
a small, high tension spring in the X direction that prevents the bolt from sliding out of the
cylinder. The only way to remove the cable from the cylinder is by energizing a door lock
actuator (DLA) that is attached to the holding bolt. The DLA then pushes the bolt out of the
cylinder and allows another bolt which is also attached to a medium, high tension spring in the Y
direction, to push the cable out of the cylinder thereby disengaging the lock.