Fire Fighting Robot Proximity Sensor

[Mohamed Saa]

Hi , i have a project of " Fire Fighting Robot " :roll:

and i'm having a problem in the proximity sensor that i want to use many IR sensors instead of using ultasonic ( very expensive ) but the maze area will be affected by :
- The light level of the surrounding in the testing area
- The room will be lit by overhead high pressure sodium vapour lights.

so how can i overcome the effect of these things

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Thanks in advance.

 

[jiripolivka]

So you must use an IR filter passing only the light from your IR source. In addition you should modulate YOUR IR light (a chopper) and use a selective amplifier after the photodetector, to avoid unwanted response.