IR proximity sensor for long range detection

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varuntejavarma

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Hello,

I have to design a low cost Ir proximity sensor for long range detection upto 1.5 metres. I have modulated my signal using pic mcu and used a tsop sensor at reciever side. But i could get only upto 10 cms range maximum. I have tried using high intensity Ir emitters but saw no improvement.
I am a newbie in this field and have no idea on how to increase the detection range. Anyone kindly help me out to solve this problem. I dont want to give up. any kind of help is appreciated.

Reagrds
 

Like in any radio or light system, you must use focusing to get most of available light power into a narrow beam.
For IR sensing you can use spherical or parabolic mirrors or lenses, also use a black pipe for the receive sensor to limit the effect of surrounding light.
 

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