Buried Wire RF for Golf Cart Traffic Control

[rickkalil]

Can anyone give me some guidance in designing an ‘invisible fence’ with a buried RF wire that can be detected from approx 30ft away? I saw this: https://www.robotshop.com/en/robotshop-perimeter-wire-generator-sensor-soldering-kit.html?utm_campaign=diy-perimeter-wire-generator-and-sensor&utm_medium=blog&utm_source=rb-community#TogetherProducts Can this be ‘amped up’ to get the desired detection range, or do I need completely different components?

[geraldinebc15]

Hello @rickkalil and welcome to the forum

I’m not an expert on this topic but I think these forum posts will come in handy:

Buried wire fence

    Hey all, well I am revisiting my lawnmower project, well not really concerned with mowing lawn but more of an outdoor autonomous robot for my backyard..     Anyway I spent ALOT of time with circuits over the past winter and with no real success. So to cut rapidly to the chase what I am trying to design/figure out is a buried wire fence type solution that I can put in my back yard with 2 sensors (left/right) on the robot and when it gets close to the wire it can either avoid it or follow it h…

Inductive Guidance

       I am trying to build a robot lawnmower(yes another guy trying this).. I need to understand Inductive guidance or RF technology a bit better to build a buried wire circuit for this.. I have read alot on the web and am starting to understand inductor/capacitor circuits.. I built a transmitter using a 555 and a 2n2222 to raise the current in the wire.. I then built a L/C circuit with a 339 comparator and I can tune it to pick up the signal from the wire(I can see this on my oscilliscope)..  …

As well as this blog post:

DIY Perimeter Wire Generator and Sensor | RobotShop Community

I hope those can help you out

[pjutras]

Thanks, Geraldine for the response.

@rickkalil you can follow this blog for additional information: https://community.robotshop.com/blog/show/diy-perimeter-wire-generator-and-sensor

[rickkalil]

Thanks for the response Geraldine. I read those forum posts and the blog before I posted my question. If my understanding is correct, I’m trying to use an RF system, not an inductive system. What I don’t know is how far away the sensor will detect the buried RF wire. I’m hoping someone with some expertise on RF buried wire (similar to the invisible dog fence) can tell me how to build my circuits to achieve detection 30ft away from a buried wire that is about 500ft in total length.