IR Proximity sensor

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VictorPS

Member

• Jul 4, 2006

• #1

IR Proximity sensor
When using IR method to detect human pass by,TX/RX put side by side,
reflection type without using reflector, what is the max practical range I
can get? Right now I can only get 1 meter, can the range be increase without using reflector?
My target is at least 2meter. Can it be done?

 

V

VictorPS

Member

• Jul 5, 2006

• #2

Anyone can advice?
Or what is the known max range for the IR Proximity sensor in the market?
Thank you.

 

akg

New Member

• Jul 6, 2006

• #3

using the burst method might help. i assume ur emitter is an IR diode. pulse a high current(ref: datasheet) through the diode for a very short duration .

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Jul 6, 2006

• #4

It's NOT a good method, IR reflection is highly dependent on the object doing the reflecting - if you're getting reliable 1m range from normally dressed people I would suspect that's probably good going?.

Dress the people in shiny foil, and you should make 5 or 6m.

It's more common to use ultrasonics for this, and doppler shift changes, or (better still) is microwave radar - which is what you usually find on automatic shop doors.

 

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Paul Obrien

Guest

• Jul 6, 2006

• #5

you're vewry very well to get 1metre after that distance most go to the polariod sonar which will work out to around 4 metres.

 

audioguru

Well-Known Member

Most Helpful Member

• Jul 6, 2006

• #6

A cheap PIR detector from RadioShack picked up normally dressed people over a wide area at a distance of 12m easily. It detects movement from their heat and doesn't radiate IR itself.
Cheap motion detectors for outdoors houselights also have a pretty good range.

 

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mnoman

New Member

• Jul 7, 2006

• #7

Victor can u give me the ckt of this proximit IR sensor as I am not getting the desirable range plz help me