Sonar is a great sensor to add to any small-scale robot ... [Graham Chow] built a simple phased-array using two SR04 modules, and it looks like he’s getting decent results.

To answer the question of whether it is possible to put together an ultrasonic 3D imager that would cheaply enable anyone to image objects underwater, [Alec Vercruysse] and fellow team members at ...

UDRI excels in robot accuracy allowing path generation and tool placement from part CAD drawings and coordination of probe/sensor placement ... intelligent process control systems; automated ...