Abstract:
Various approaches to generating and maintaining an ultrasound focus at a target region include configuring a controller to cause transmission of treatment ultrasound pulses from a transducer having multiple transducer elements; cause the transducer to transmit focusing ultrasound pulses to the target region and generate an acoustic reflector therein; measure reflections of the focusing ultrasound pulses from the acoustic reflector; based at least in part on the measured reflections, adjust a parameter value associated with one or more transducer elements so as to maintain and/or improve the ultrasound focus at the target region.
Abstract:
A sonar survey system and method excites reflectors using a broadband message that excites all frequencies within the band providing for selection and evaluation of frequencies of interest after the survey is completed.
Abstract:
This disclosure provides a system and method for producing ultrasound images based on Full Waveform Inversion (FWI). The system captures acoustic/(an)elastic waves transmitted through and reflected and/or diffracted from a medium. The system performs an FWI process in a time domain in conjunction with an accurate wave propagation solver. The system produces 3D maps of physical parameters that control wave propagation, such as shear and compressional wavespeeds, mass density, attenuation, Poisson's ratio, bulk and shear moduli, impedance, and even the fourth-order elastic tensor containing up to 21 independent parameters, which are of significant diagnostic value, e.g., for medical imaging and non-destructive testing.
Abstract:
Techniques are disclosed for systems and methods to provide three dimensional target selection for use when operating mobile structures. A three dimensional target selection system includes a logic device configured to communicate with a user interface and receive volume data from a volume data source. The logic device is configured to render a first perspective of a three dimensional representation of the volume data on a display of the user interface, determine a first viewpoint vector within the 3D representation based, at least in part, on a first user input received by the user interface; and identify an object or position within the volume data based, at least in part, on the first viewpoint vector and the first user input.
Abstract:
Es wird unter anderem offenbart ein Verfahren, das folgendes umfasst: Erhalten von Ultraschallechosignaldaten, wobei die Ultraschallechosignaldaten mehrere Datenpunkte umfassen, wobei die Ultraschallechosignaldaten ein von einem Ultraschallsensor erfasstes Ultraschallechosignal zumindest teilweise repräsentieren, und wobei das Ultraschallechosignal auf Reflektionen an einem oder mehreren Reflektionsobjekten zurückgehende Signalanteile umfasst, Gruppieren mehrerer Datenpunkte der Ultraschallechosignaldaten zu einem oder mehreren Datenpunkt-Clustern, Bestimmen von Kenndaten zumindest teilweise in Abhängigkeit eines Datenpunkts und/oder mehrerer Datenpunkte eines Datenpunkt-Clusters der Ultraschallechosignaldaten, Klassifizieren eines oder mehrerer der Reflektionsobjekte zumindest teilweise basierend auf den als Ergebnis des Bestimmens erhaltenen Kenndaten.
Abstract:
Techniques are disclosed for detection and ranging systems and methods to improve range resolution, target separation, and reliability. A method includes selectively attenuating a signal representing a ranging system return or echo from targets so as to suppress side lobes or other undesirable artifacts appearing in the signal due to noise, interference, and/or distortion. A method may additionally or alternatively include rejecting interference events in ranging system returns by comparing a received return with that expected from a target illuminated by the ranging system, as determined by characteristics of its particular ranging sensor, and rejecting or attenuating returns or portions of returns that fail to match those characteristics in time or space. A system (200) configured to perform such methods and comprising a transducer/ antenna (264), a transceiver (234), a controller (220), and/or other logic devices implementing a pulse generator (242), correlator (244), selective attenuator (246), comparator (250), buffer (252), subtractor (254), and/or output circuit (214) is also disclosed.
Abstract:
초음파 장치가 개시된다. 본 초음파 장치는 평면 파를 송신하기 위한 트랜스듀서 및 평면 파를 복수의 서로 다른 진행 방향으로 순차적으로 송신하여 평면 파가 진행되는 송신 범위를 확장시키도록 트랜스듀서를 제어하는 프로세서를 포함하며, 트랜스듀서는 송신된 각 평면 파에 의해 대상체로부터 반사되는 복수의 초음파 신호를 수신하고, 프로세서는 수신된 복수의 초음파 신호를 합성하여, 확장된 송신 범위 중에서 기설정된 적어도 일부 영역을 영상화할 수 있다. 이에 따라, 초음파 장치를 이용하는 사용자에게 좀더 넓은 영상을 제공할 수 있다.
Abstract:
Spoof-detection and liveness analysis is performed using a software-based solution on a user device, such as a smartphone having a camera, audio output component (e.g., earpiece), and audio input component (e.g., microphone). One or more audio signals are emitted from the audio output component of the user device, reflect off a target, and are received back at the audio input component of the device. Based on the reflections, a determination is made as to whether the target is comprised of a three-dimensional face-like structure and/or face-like tissue. Using at least this determination, a finding is made as to whether the target is likely to be spoofed, rather than a legitimate, live person.
Abstract:
The present disclosure provides an intelligent voice assistant system, apparatus and method for a vehicle. In an exemplary embodiment, a system for a vehicle comprises: a ranging sensor configured to generate ranging sensor data with respect to an object adjacent to the vehicle; a controller configured to determine, based on the ranging sensor data, whether a distance between the object and the vehicle is smaller than a threshold if said distance has been unchanged for a predetermined period, and to generate a first vocalization command if it is determined that said distance is smaller than the threshold; and an external speaker configured to output vocalized sound based on said first vocalization command.