Patent ID: 11883955
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC B  G | IPC B  G

Claim 0:
1. An autonomous delivery robot, comprising:
a plurality of wheels;
a plurality of motors, each of the plurality of motors being configured to rotate a different one of the plurality of wheels;
a braking system comprising a plurality of brake modules, each of the plurality of brake modules being configured to engage a different wheel of a first subset of the plurality of wheels to stop movement of the wheel when the brake module is unpowered; and
a controller configured to perform an operation to test the braking system upon a power up of the autonomous delivery robot, the operation comprising:
instructing each of the plurality of motors to drive its respective wheel in a first direction, while the plurality of brake modules are engaged with the first subset of the plurality of wheels;
monitoring, for each of the first subset of the plurality of wheels, a first amount of rotation of the wheel, while each of the plurality of wheels is driven in the first direction;
upon determining that the first amount of rotation for each of the first subset of the plurality of wheels is less than a predetermined amount of rotation, instructing each of the plurality of motors to drive its respective wheel in a second direction, while the plurality of brake modules are engaged with the first subset of the plurality of wheels;
monitoring, for each of the first subset of the plurality of wheels, a second amount of rotation of the wheel, while each of the plurality of wheels is driven in the second direction; and
upon determining that the second amount of rotation of at least one of the wheels in the first subset of the plurality of wheels is greater than the predetermined amount of rotation, (i) determining that a test of the braking system has failed and (ii) performing at least one action, based on the determination that the test of the braking system has failed.