Long distance ping

PBK

Is it possible to use the ping·method to measure long distance, up to·100m?

My project allows sensor both on the robot, and on the home base unit, I need to measure the distance between the two units. I also have RS-485 serial communication between the two units.
The Parallax Ping))) Ultrasonic Sensor only works on short distance, is there any other way, maybe with·a stronger·speaker fx?

Peter

Mike Green

You also would need to focus the beam more narrowly. It would spread out way too far at that sort of distance. You could use a large parabolic reflector with ultrasonic transducers at the focus. It's also possible to make sound lenses, but you'd have to do your own research there ... way out of my league. They would also likely be large to be effective.

Craig Eid

The maximum range for a Sharp distance measuring sensor is 5 meters, achieved with the GP2Y0A710K0F -· http://www.sharpsma.com/Page.aspx/americas/en/part/GP2Y0A710K0F/. It has an analog output and is rather pricey. Contact an applications engineer at Sharp and see if they have any suggestions for your extended range sensing.







▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
························ Craig Eid


··········· Triad Research and Development
Electical Engineering Design and Consulting Services

··················· www.TriadRD.com

Chris Savage

I would say for longer distances like that ultrasonic is not going to work. You’ll probably have to use radar instead. There used to be radar kits available though I haven’t seen one in awhile. You may want to check the laws concerning operating in that band. Take care.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Chris Savage
Parallax Engineering

PBK

Thanks for your reply everybody!

Peter