should i use a pressure sensor?
Infared Distance Sensor?
I've read about people achieving surprisingly good resolution with a pressure sensor
QuotePing? Best of the three but not to sure about the reflectivity of the surface and any turbulence caused by the copter.
Quote from: PeterH on Nov 08, 2012, 04:49 pmI've read about people achieving surprisingly good resolution with a pressure sensor To within a few inches of altitude? Underneath a helicopter rotor?
Could you use a linear CCD array as a detector and an offset and angled laser pointing at the ground. The CCD (maybe through IR filter) sees the laser dot on the ground and knows to hover higher/lower to get dot in required position on CCD array. See
I thought of that, too, but it needs image processing to work.
Hover means to be so close to the ground that you can produce a pressure which will allow you to "sit" on it like a cushion.