Devices¶
Sensors (Input)¶
Devices that detects the state of a physical environment, and quantitatively provides a corresponding output as an electrical/optical signal.
Sensor Fusion¶
Combining measurements of the same quantity from multiple sensors, to obtain a combined information with lower uncertainty than any of the individual sensors. Using multiple sensors for the quantity also allows us to verify each sensor wrt others.
If we have \(s\) sensors, $$ \begin{aligned} \mu_\text{S} &= \left( \sum \limits_s^S \dfrac{\mu_s}{\sigma^2_s} \right) \sigma^2_{S} \ \sigma^2_\text{S} &= \dfrac{1}{\sum \limits_s^S \dfrac{1}{\sigma^2_s} } \end{aligned} $$ where \(S\) refers to the combination of all the sensors
Effectors (Output)¶
Devices that perform some action such as emitting light, sound, motor, etc