Sensor that can detect short range obstruction

Have you looked at any sensors so far?

I"m thinking of using an PIR or Ultrasonic motion sensor

I saw a device made by some students for a final year project at Curtin University that used Ultrasonic. The application was suitable as they wanted it to be used as a walking stick but I can a few problems for above the waist if it need to be wide angle.

• There is plenty of Broadband IR noise from the sun so it may saturate the signal.
• The Ultrasonic sensor is a better bet but is directional. How directional will end being how the sensor is read and a few things.

Lot of testing to be done but I would steer toward Ultrasonic than IR. IR though is cheaper and easier to implement so it should not take long to see any bugs develop.

Malcolm

Hey, I did a couple of posts on using ultrasonic and pir sensors with the Ras Pi in the stem section, you can check them out here:

PIR-fect

Ping))) Me!!!

they're just basic examples of how to use them, but they are simple devices.

Mike

Check out Maxbotix sensors - they have a selection of sensors with different beam angles.

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Hi,

An ultrasonic sensor should do your work at the primary level.

Also, you may set range for the ultrasonic sensor so that it will work only for the short range (say, 1-5 metres).

Do let me know of your progress.

Akhil kapoor

http://www.25robot.com/2015/04/getting-started-with-robotics.html

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Okay.

Did you do the right search using different keywords on the web ?