
CSIE54600 Pervasive Computing Lecture02: Overview
Note 22
4th Enabler:
Sensors/Actuators
z Miniaturized cameras,
microphones,...
z Fingerprint sensor
z Radio sensors
z RFID (Radio Frequency
Identification)
Pervasive Computing Overview 42
z Location sensors
z e.g., GPS
z ...
Example: Radio Sensors
z No external power supply
z Energy from the
z Piezoelectric(壓電性的) and
pyroelectric(焦熱電性的)
materials transform changes
in pressure or temperature
into energy
Pervasive Computing Overview 43
z RF signal is transmitted via an antenna (20 m distance)
z Applications: temperature surveillance, remote control
(e.g., wireless light switch),...
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