[HoE] Re: [HOE] Sensors

["Requiem" <Requiem@etheric.freeserve.co.uk>]

>>Sensor I am a little dense on the difference between passive and active
>>sensors
>>Do Passive sensors only detect other things giving off the thing that it
>>senses, whereas an active sensor can build a picture of its
>>surroundings? Could someone give me a couple of examples of different
>>sensors please?


I know it's really annoying when people say this, but:
First post, so I _do_ hope this is going to the right place.

Anyway, as I see it, the various 'human sense' sensors:
Sound:Passive - Microphone, Active - Sonar
Sight:Passive - Camera, Active - Laser tripwire (break the beam, Bye bye
baby!)
Touch:Passive - Pressure plate/Motion sensor (from air pressure)
            Active - Can't think of a thing.
Taste/Smell:Passive - Chemical detector, Active - Don't even _go_ there.

Anyway, hope this gets there and doesn't really annoy anyone (that can do
anything about it, that is)

Requiem (for the fallen)