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Electronics => Electronics => Topic started by: karmax on December 22, 2009, 10:24:17 AM

Title: ultrasonic sensor for obstacle detection
Post by: karmax on December 22, 2009, 10:24:17 AM

i tried a no of circuits for obstacle avoidance using ultrasonic but no one works. if any one have any circuit that surely works .please let me knw . i will be very thankful..

Title: Re: ultrasonic sensor for obstacle detection
Post by: little-c on December 22, 2009, 10:57:14 AM

what sort of things have you tried?
why dont they work?

is it a code or hardware issue?

are the sensors working?

are the sensors looking where they are supposed to?

Title: Re: ultrasonic sensor for obstacle detection
Post by: z.s.tar.gz on December 23, 2009, 02:25:29 PM

A different approach would be posting what you're using now so somebody can look at it and tell you what's wrong. Pictures and schematics make all the difference!

Title: Re: ultrasonic sensor for obstacle detection
Post by: karmax on December 26, 2009, 04:05:03 AM

Quote from: little-c on December 22, 2009, 10:57:14 AM

what sort of things have you tried?
why dont they work?

is it a code or hardware issue?

are the sensors working?

are the sensors looking where they are supposed to?

http://www.google.co.in/imgres?imgurl=http://www.leang.com/robotics/info/articles/minison/sonar.gif&imgrefurl=http://www.leang.com/robotics/info/articles/minison/minison.html&h=550&w=648&sz=10&tbnid=O5S8Y7CDMZcH4M:&tbnh=116&tbnw=137&prev=/images%3Fq%3Dsonar%2Bcircuit&usg=__KpiWWYnPK8WJfCdN-tIqO5Uo3qY=&ei=Rd81S_K3EozW7APt0ZX9BQ&sa=X&oi=image_result&resnum=6&ct=image&ved=0CBoQ9QEwBQ (http://www.google.co.in/imgres?imgurl=http://www.leang.com/robotics/info/articles/minison/sonar.gif&imgrefurl=http://www.leang.com/robotics/info/articles/minison/minison.html&h=550&w=648&sz=10&tbnid=O5S8Y7CDMZcH4M:&tbnh=116&tbnw=137&prev=/images%3Fq%3Dsonar%2Bcircuit&usg=__KpiWWYnPK8WJfCdN-tIqO5Uo3qY=&ei=Rd81S_K3EozW7APt0ZX9BQ&sa=X&oi=image_result&resnum=6&ct=image&ved=0CBoQ9QEwBQ)i tried this circuit but problem is it works some time good but some time not ....circuit does nt have fixed threshold so that i can judge that above this range it will work and just small from this range it will not work there is no such range thats the major problem ...please help me for the same...

Title: Re: ultrasonic sensor for obstacle detection
Post by: billhowl on December 26, 2009, 09:11:10 PM

(http://instruct1.cit.cornell.edu/courses/ee476/FinalProjects/s2007/jjl49_mar97/jjl49_mar97/ParKontroller_schematic.JPG)
http://instruct1.cit.cornell.edu/courses/ee476/FinalProjects/s2007/jjl49_mar97/jjl49_mar97/index.htm (http://instruct1.cit.cornell.edu/courses/ee476/FinalProjects/s2007/jjl49_mar97/jjl49_mar97/index.htm)
You may try this