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J GroffJ Groff 07/27/2014 at 17:190 Comments

Now that all the ultrasonics are in place the time has come to determine their optimum  use. Basically, the faster you are moving the less time you have stop and the less time something can be in range. The decision to halt forward momentum is based on how long something is in range vs closing distance which is all a function of speed. Its a classic time, speed distance calculation which as I see it becomes a linear programming problem in three dimensions. Using the speed axis as Y, the X plane becomes time something is in range and Z becomes distance. The attached photo shows the relationships via graph.