obstruction detection

[indomitable12345]

i want to design a robot which can detect obstruction present in front of it within the range of 30-140 cm and within the lateral precision on +-15 cm..can anyone help me in finding a solution to this obstruction detection problem??

 

[flatulent]

One way is to send out IR or visible range beams and detect their return. Turn the beam on and off at a specific rate so that you can separate the returned beam from reflections of light and IR from other sources.

 

[IanP]

This can be done with sound or light (IR) ..
Borh methods are compared in the following publication:
"Robot Wall Sensors, Sound vs. Light"
**broken link removed**

Regards,
IanP

 

[folks]

i want to design a robot which can detect obstruction present in front of it within the range of 30-140 cm and within the lateral precision on +-15 cm..can anyone help me in finding a solution to this obstruction detection problem??

Hello.
I designed one. To detect the objects I use infrared diodes and receiving modules of TV. With a microcontroller I sent the infrared signal, later, activate to timer of the microcontroller and later the signal arrived to module receiver, then calculated the Time-Distance. I recommend much these modules, they are very precise and with great distance.

Sorry for my stupid english
Regards.