|Go to Dolphin Inspired Sonar.||Modified on|
22 March 2016. I have been mostly off-line for more than a year.
At the moment, I am adapting a simulations program, Sonic Eye, to:
analyze files created from echoes of real clicks of dolphins and
The new program concentrates on Feature-Based Passive (FBP) Sonar, with no active sonar remaining in the code. It simulates a fish that, in animation, can "swim" across the screen, and it simulates echoes-of-a-click arriving at echo-sensors the fish. It computes a picture from the echoes of each click - one picture per click.
While adapting existing code to FBP sonar, I changed the grid of the array of sensors from hexagonal to square, to make easier the work of anyone who might build a real array. Perhaps, simply, an existing array of hydrophones can be adapted to feed data into this new program. Though, the quality of the images might be better if the spacing of the sensors is closer to that in the jaw of a dolphin.
Also, I am programming-in a means to test some new methods of computation. Hopefully, this will either produce better pictures or produce pictures faster. The "book-keeping" involved is driving me crazy.
INTERJECTION of 12 July 2013
01 June 2013
Note of 23 Aug 2013: The Method of Ridges led to the Method of Cells which was enhanced by the Method of Bridges and all were thrown out for the Method of Sheets [2015: all wrapped up into Synchronics]. The images are better now and I am working to improve them. Speed of computation has increased.
Note of 16 Jan 2015: I have been working on explanations of details of the new methods. The latest name for them is Synchronics. Imagine that a click emmanates from the forehead of a dolpin and echoes of that click arrive at various times T at various sensors M. The set of ordered pairs (M,T) is a synchron. The new methods involve ways of teasing synchrons out of the welter of times-of-arrival of features of the click on the various sensors. Each "sensed synchron," can lead to one point in an image for that one click. The methods seem simple in my head, but are not lending themselves to easy expression in words. It is taking me "forever" to get the next patent application written. I have, perhaps stupidly, agreed to continue my teaching job through Spring Semester 2015 -- leaving me little time to make real progress in the writing.