Patent ID: 9189083
Filing Date: 2015-11-17
Classification: A61B,G06F,G16H

Abstract:
1. A portable measurement system comprising: a controller that emits by way of a probe ultrasonic waveforms from three or more ultrasonic transducers on a probe in a three-dimensional sensing space; ultrasonic transducers on a probe in a three-dimensional sensing space; digitally samples by way of a receiver ultrasonic waveforms from three or more microphones on a receiver to produce sampled received ultrasonic waveforms; tracks a relative location and movement of the probe in the three-dimensional ultrasonic sensing space from differential time of flight waveform analysis of the sampled received ultrasonic waveforms; suppresses a ringing portion of the received ultrasonic waveforms that overlap with digitally sampled acoustic waveforms received at the microphones; minimizes distortion associated with ultrasonic transducer ring-down during generation of a high-resolution position tracking of the probe, where the controller applies a weighting of a Time of Flight (TOF) ultrasonic distance measurement as a function of distance between the probe and the receiver, wherein the distance is 10 cm to 90 cm for permitting three-dimensional interaction.