4 replies to this topic

[VincentA]

Hi Guys, Has anybody tried Ultrasonic Transducer for motion detection? What about efficiency as compared to IR motion detectors? Please share your experience. Want to include one in my coming project (When i'll have my netduino plus). Vincent

[Charles]

While you will not find any code examples, the Arduino forums have been around a long time, much longer than the Nteduino ones. As a result, there is a much larger user base and many more things have been tried. I found this thread over there: http://www.arduino.c...?num=1280365279 It's not exactly what you are looking for, but there looks like some great insight there. There are a number of threads there as well referencing ultrasonic devices specifically for motion sensing. Search around over there and I'm sure you'll find some great stuff!

[VincentA]

Thanks Charles! After a bit of digging i found out couple of nice articles.
Thisone is a pic range finding project. I think what i need to do is continuously measure distance and once I get any deviation raise the motion detected event.

This one is also nice. Once the idea behind is understood its much easy to port to achieve desired result.

[bill.french]

What are you trying to do? This thread I'm sure has lots of good info: http://forums.netdui...ch__1#entry4555 I would guess for motion detection, it's going to be hard to beat something like this for simplicity: http://www.parallax....83/Default.aspx

[VincentA]

hey Bill, thanks! Actually I want to have a motion sensor but If i can get a range finder with it as well its a plus,thats why I started to look out for ultrasonic transducers. My basic ideas is to mount the transducers on a wall and then start checking out the distance every 200-300 mc and if i find any deviation in readings then obviously theres something moving out there. The PIR sensor from parallax or others might be really easy to use but i was thinking if needed i can take out these transducers and use to make a range finder or obstacle finder(for robots) so it kinda serves multiple purposes thats why I am more attracted to ultrasonic transducers. But as per my digging I havent found out project with really nice results but anyways I can make an simple obstacle finder for my autobot Corey mentioned that he hasnt been successful to get good results... So I think i will start a little project as well to check out if i can do something better. Vincent