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Appendix K: Glossary
BiT
o
Built in test
Black Box
o
Robot data recorder that tracks information during the robot’s life.
Chassis
o
The plastic structure/frame of the Roomba
Cleaning frame assembly
o
The cleaning assembly includes the pivoting self adjusting frame
that supports the brushes, brush guard, brush motor and gearbox.
Debris
o
Dirt that is being picked up by the Roomba
Encoder
o
A sensor that relays information to the pcb
Force field
o
An IR avoidance beam that ensures the Roomba does not bump
into it. Present in the Home Base and virtual Wall
Home base
o
The self charging station
Infra Red (IR)
o
A wave of light with wavelengths greater than those of visible
light (0.75 and 1000 µm
)
. IR does not pass through walls.
Light Emitting Diode (LED)
o
Semiconductor light source that emits visible light or invisible
infrared radiation.
Mobility
o
Capable of moving or being moved readily
Panic Spin
o
A systematic escape behavior that the robot enters when it thinks
it is stuck. The robot senses that its front wheel is not turning and
abruptly changes course with a rapid spin.
PWM
o
Pulse width modulation
Radio Frequency (RF)
o
The frequency range from 10 kHz to 100 GHz used for
transmitting data, audio, or video. RF passes through walls.
RCON
o
Room Confinement (reference to the omni-directional IR sensor
that sits on top of Roomba’s bumper)
Stasis
o
Refers to things that are not moving or changing
User interface (UI)
o
The physical means and method of interaction between users and
products
Virtual
o
Is not physical
