week 11 Flashcards
1
Q
where can sensors be found
A
- automotive
- biomedical eg. pacemakers
2
Q
how does a sensor work- process?
A
- Change in stimulus response
- sensing element- front of sensor exposed to stimulus
3 transmission link - signal processing- signal manipulated
- electrical signal
3
Q
sensor defintion
A
a device that produces a signal in response to a specific physical stimulus
4
Q
transducer definition
A
a device which converts energy from 1 form to another
5
Q
what is an active sensor
A
sensor modulates an external signal in response to stimulus
eg. motion sensor in automatic doors, it actively emits signals to sense environment
6
Q
passive sensor?
A
doesn’t need additional energy source, generates a signal in response to external stimulus
eg. thermometer
7
Q
absolute sensor?
A
sensor response to stimulus is in refernce to physical state
eg. GPS
8
Q
relative sensor?
A
sensor response to stimulus is relative to a specified reference
eg. Phone
