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US 12,568,341 B2Granted
Dynamic capping with virtual microphones
AssigneeSim IP Hxr LLC
InventorsBrian Kappus, Benjamin John Oliver Long
Life of this patent
Estimating the term…
Abstract
Estimating the field strength from an ultrasonic phased array can be done by summing the contribution of each transducer to the point of interest. Since this contribution is already calculated when creating a converging spherical wave, it can be reused to add a virtual microphone to the system. By monitoring this microphone and moving it along with new focus points, a robust system of field estimates and regulation may be established.
Claims18
An ultrasonic phased array comprising:
- a plurality of transducers with known relative positions and orientations;
- at least one complex activation coefficient representing a magnitude and phase of a driving signal to at least one of the plurality of transducers;
- a plurality of virtual microphone locations;
- a processor output comprising:
- 1) a computer for computing a transducer complex field from at least one of the plurality of transducers at the plurality of virtual microphone locations;
- 2) a multiplier for multiplying the transducer complex field by an activation coefficient to return a field estimate at the plurality of virtual microphone locations;
- 3) an incorporator for incorporating the field estimate into a weighted average;
- and
- 4) a mover for moving the plurality of virtual microphone locations at a distance composed of a fixed minimum length and a random length;
- wherein if the weighted average exceeds a pressure goal, output is attenuated.
7 more elements
Dependencies are inferred from the claim text.