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Originally Posted by WM6
As we know, correct speed for gold target is 1.73m per second.
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This opens a new problem...
If we put the PD on a swiveling tripod that is towed on a trailer, then we will have two velocities to contend with. There will be the linear velocity of the trailer and the angular velocity of the rotary motor. The problem becomes how to maintain 1.73m per second with both of these motions. I would propose that the simplest solution is to drive the car at exactly 1.73m per second, with no angular velocity at the tripod. In this condition, we must insure that the PD is pointed in the direction where you want to hunt treasure. Then when we hear the beeps, we will know the line which is perpendicular to the road where we can find treasure. After establishing this line, we can make a second pass from the road with the PD turned to a 45 degree angle to the road. This will give us a second line at 45 degrees that we can use to triangulate and find the precise location to put the shovel in the ground.
Of course, we could drive slower, and allow some slow rotational speed, but we must have a complex rotational motor firmware that will factor in the forward velocity and compensate the angular velocity during the arc to maintain exactly 1.73m per second.
While this is more difficult, it will save us the trouble of making a second pass to triangulate... we can pinpoint on a single pass.
Best wishes,
J_P