"Where'd you find the magnetometer for so cheap? Any I've found are in the $20 range."
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warren smith
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wire guidance transmitter and sensor?
Started this discussion. Last reply by Jonathan Dean Dec 23, 2012. 14 Replies 0 Likes
I'm looking for a wire guidance transmitter and sensor system (similar to an invisible dog fence) to control the route of a robot lawnmower. A transmitter puts a RF signal on the buried wire and…Continue
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Kathy Moseler replied to warren smith's discussion wire guidance transmitter and sensor?"How do you think the beacons will affect battery life? Assuming it takes too much power, would it make sense to mount one or more beacons on the charging base instead?"
warren smith replied to warren smith's discussion wire guidance transmitter and sensor?"I have put a snow plow (24" x 12" board with some rubber across the bottom) on the front of my robot mower and, with the help of a magnetometer compass ( $4.35 from China with free shipping), have programmed it to go back and forth across…"
Keith 'DeadlyDad' Olson replied to warren smith's discussion wire guidance transmitter and sensor?"I had another idea: place 3 high-output IR beacons on the mower, then mount an IR filtered webcam (..or 2 or 3 or...) on your roof/etc. VERY low cost, and provides both position and orientation for the lawn mower."
Kathy Moseler replied to warren smith's discussion wire guidance transmitter and sensor?"My company sells commercially available robot lawn mowers. There is a reason most robot mowers go in a random fashion; it's really hard to make them go straight.
Bosch made one that only works in a fenced area. It is available in…"
keith vasilakes replied to warren smith's discussion wire guidance transmitter and sensor?"Use your dog fence and dead reckoning, just measuring where you go and plotting position. stop when you cross the fence.
Using a COTS dog fence is probably the easiest way to do the job. the hard part is all done.
Or you could use sonar to do…"
Keith 'DeadlyDad' Olson replied to warren smith's discussion wire guidance transmitter and sensor?"How about going RFID? You could bury the tags in a grid, then create a map for where to mow and where not to. The signal strength for all of the tags within range would tell the mower precisely where it is. You could push…"
david ottaway replied to warren smith's discussion wire guidance transmitter and sensor?"Ah - I misunderstood and didn't consider your ultimate solution. I thought you wanted it to actually follow the buried wire which would involve a lot of wire and a lot of digging to bury it!
So, you DO have something for it to bump into…"
warren smith replied to warren smith's discussion wire guidance transmitter and sensor?"Thanks for the replies. I can't just depend on hitting something since we have no fences around our yards between neighbors.
My solution was to buy a pet invisible fence…"
david ottaway replied to warren smith's discussion wire guidance transmitter and sensor?"Or, even simpler - my neighbor has a mower that works like a "Roomba" vacuum cleaner. That is, no guidance at all, just go until you hit something, then turn. The randomness assures that, eventually, the whole yard is…"
david ottaway replied to warren smith's discussion wire guidance transmitter and sensor?"Or, If the math doesn't throw you, how about homebrew MPS (Mower Positioning System)? Devise some sort of beacon - could be ultrasonic, Infrared, something that can be detected and not normally occurring in your yard. Then build a…"
david ottaway replied to warren smith's discussion wire guidance transmitter and sensor?"check this out - it may give you some ideas.
http://www.philohome.com/sensors/filoguide.htm
I don't know about finding the signal if the wire is buried (would the dirt shield it?) but maybe if you increase the power?
Dave
"
Marcelo Rodrigues replied to warren smith's discussion wire guidance transmitter and sensor?"Warren,
Why not painting the white line?? Just kidding!!! Hehehehe....
I have never seen this sensors available, probably you have to develop by yourself, what could give a nice product to sell.
The most difficult part, IMHO is to align the robot…"
warren smith replied to warren smith's discussion wire guidance transmitter and sensor?"No reply. This board is not very popular.
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warren smith posted a discussionwire guidance transmitter and sensor?
I'm looking for a wire guidance transmitter and sensor system (similar to an invisible dog fence) to control the route of a robot lawnmower. A transmitter puts a RF signal on the buried wire and sensors on the robot pick up the signal and follow it. This type of equipment is used a lot in industry but industrial grade electronics is very expensive. I am looking for a low-priced transmitter and sensors. I have googled and found nothing. Please don't suggest I paint a white line all over my…See More
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