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This thread is privately moderated by Jack Crossfire, who may elect to delete unwanted replies.
Feb 24, 2009, 02:37 PM
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2D sonar 4 U

Another amplifier stage & the dual sonar receivers started working. Anything can be fixed with more op-amps. This circuit is now over 1000000 gain. The receivers worked with all our op-amps, but old problems returned.

12" sensor spacing was pretty good at sensing 2 dimensions in a 4' line 5' above the sensors. Most of the time it got within 1". Distance readings R pretty stable throughout the week, as we increase the sensor count.

Forget about any lower. There's no way a full sized airframe is going to hold its position accurately enough for this to work. We're down to finishing ghetto rotor & flying to higher altitudes with the sonar to get full ranges with engine noise & without reflections.

With all its problems, patents, & high prices, custom sonar is very depressing. Who knows what would happen if the sonar banging was combined with the eternal blizzards of Minnesota.
Last edited by Jack Crossfire; Feb 24, 2009 at 03:00 PM.
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