摘要:
An ultrasound imager supports several ultrasonic transducers simultaneously. The imager polls the transducer connection ports to determine which transducers are connected to which port and displays attributes of each transducer in conjunction with a port identification on the screen. The user selects which transducer is to be driven using a trackball or cursor arrow which directs an indicator to point to the selected transducer.
摘要:
A Frequency Dispersive Transmitting Array (30) for propagating composite e energy (10) emulates narrow-band beams (20) of different frequencies which can be simultaneously radiated in all directions, or in any subset of directions, relative to an array (42) of radiating elements (32) because of the addition and cancellation of components of wave energy (10) radiated, is disclosed. A signal source (34) provides input signals (36), having frequencies which may be acoustic or electromagnetic, which are coupled by feedline (37) to radiating elements (32) through a plurality of time delay devices (38). Each one of time delay devices (38) is interposed between successive ones of radiating elements (32) and delays emission of replicas of signals (36) therefrom by a time delay .tau..sub.0 which is a multiple of the period of the dominant frequency radiated in a direction broadside to the array. Window weighting function devices (40) are coupled into feedline (37) modifying signals (36) ahead of radiating elements (32) to control the behavior of side lobes of the beam as in a conventional beam-forming array. Frequency dispersion of the beams (20) is controlled by selection of the bandwidth of input signals (36) having frequencies in a desired spectrum depending on the use of the system. Direction (.theta.) of an object from transmitting array (30) is determinable from the frequency of wave energy (10) either directly received at the object or reflected by the object to a remote receiver, because each direction (.theta.) corresponds to a distinct frequency (f) of transmitted wave energy (10).
摘要:
A beam former method and an apparatus therefor in an ultrasonic imaging system, in which switching of delay elements is performed by means of delay switches in a section in which no ultrasonic wave transmission/reception is performed and switching noise generated in this section is stored as a noise signal into a memory. The stored noise signal is subtracted from a reception signal which is obtained through ultrasonic wave transmission/reception and which contains switching noise superimposed thereon to thereby obtain a reception signal from which the noise has been eliminated.
摘要:
A combination of integrated circuit (IC) flatpacs used in combination to tch selected sonar microphone inputs from a circular receiving array to position a beam containing a sounding target intermediate to an equal number of left and right microphone pickups and selectively switching through weighted delay circuits for beam forming to present the target in this receiving beam electronically on a flat display with digital control of "coarse" seven and one-half degrees and "fine" one-tenth degree increments to provide a display of the bearing of the target.
摘要:
In an ultrasonodiagnostic tomography apparatus for transmitting focused sound wave from a plurality of transducers forming an array to a predetermined focus point and for carrying out beam formation for receiving sound from said focus point with dynamic focusing, wherein the width of transmission beam at said focus point is controlled by means of said transducers so that the width of transmission beam at said focus point may be larger than the width of receiving beam from said focus point.
摘要:
An ultrasonic diagnosis apparatus is provided with a plurality of phased array transducer elements arranged in a row. The number of simultaneously driven transducer elements is changed in response to a rate pulse to increase the ultrasonic scanning line density without increasing the number of the transducer elements, while the position of the focal point is adjusted to maintain the minimum width position of the ultrasonic beam provided by the group of the simultaneously driven transducer elements substantially constant irrespective of the change of the number of the simultaneously driven transducer elements by controlling the phase of transmitted and received ultrasonic waves by means of delay elements.
摘要:
A sonar apparatus incorporating steered time compressor means for time coessing and steering hydrophone information. Novel control circuitry enables time compressing and steering operations to be performed in a single storage device.
摘要:
Unipolar acoustic pulses of relatively large amplitude and short duration are formed by driving an electroacoustical transducer with a generally staircase-shaped waveform, advantageously through a low pass filter. The applied waveform is formed by linearly summing constituent electrical pulses of preselected amplitude, duration, polarity, and relative time of occurrence. The transducer driving signal acts to reinforce the transducer output in the desired direction, while opposing its output in the reverse direction.
摘要:
A speaker system includes a first speaker and a second speaker. The first speaker includes a first sound signal input interface configured to acquire a first sound signal, and a first sound emitter configured to output a first sound based on the first sound signal in a state in which a position of a host device is fixed. The second speaker includes a second sound signal input interface configured to acquire a second sound signal, a moving body that includes a position information acquisition interface configured to acquire information relating to position and that is configured to move based on the information relating to position, and a second sound emitter configured to output a second sound based on the second sound signal.
摘要:
An ultrasound probe has a two dimensional matrix array transducer and a digital microbeamformer. The microbeamformer comprises a plurality of transmitters and amplifiers coupled to elements of the array transducer, a plurality of low power analog to digital converters and digital beamforming circuitry coupled to the amplifiers, a microbeamformer controller, a power supply and a USB controller which cumulatively consume three watts or less.