Abstract: An obstacle detection apparatus for vehicles includes: a first ultrasonic sensor for detecting a distance to an obstacle; a second ultrasonic sensor at a position of the vehicle for receiving a reflection wave from the obstacle of an ultrasonic wave from the first ultrasonic wave; a notifier that gives a notification of detecting the obstacle present within a preset distance in one or more of predetermined notification areas including a first notification area for the first ultrasonic sensor, and a second notification area for the second ultrasonic sensor detects the obstacle for the vehicle; and a controller that controls contents to be notified by the notifier. Furthermore, the controller determines whether a first indirect wave distance and a second indirect wave distance are used to determine whether to give the notification of detecting the obstacle in the first notification area.
October 21, 2015
Date of Patent:
July 20, 2021
DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
Abstract: The present technology provides an acoustic transmission member that includes a core layer layered between two skin layers, the skin layers being formed of a material having a higher elastic modulus than a material of the core layer. A thickness ds of the skin layers is formed such that Equation (1) is satisfied, where f is the center frequency of the transmission frequency band, cw is the acoustic velocity in the medium surrounding the acoustic transmission member, ? is the wavelength corresponding to the center frequency in the medium, Cds is the longitudinal wave acoustic velocity in the skin layer, and n is a discretionary natural number.
Abstract: A transducer system with transducer and circuitry for applying a pulse train at a single frequency to excite the transducer. The transducer is operable to receive an echo waveform in response to the pulse train. The system also comprises circuitry for determining a time of flight as between a first reference time associated with the pulse train and a second reference time associated with the echo waveform.
Abstract: A marine electronic system is provided including a transducer housing including a first transducer element configured transmit one or more first sonar signals into a body of water and a second transducer element configured to transmit one or more second sonar signals into the body of water. A length of the first transducer element is longer than a length of the second transducer element. The transducer housing also includes at least one third transducer element configured to receive first sonar returns from the first sonar signals and second sonar returns from the second sonar signals. The system includes a sonar signal processor configured to receive the first sonar returns, receive the second sonar returns, and determine sonar image data based on both the first sonar returns and second sonar returns. A transducer housing with a forward scanning portion and a downward scanning portion is also provided.
Abstract: An acoustic sensor, including a carrier element, a diaphragm element, which is situated on a first side of the carrier element, and an electroacoustic transducer, which is situated on a side of the diaphragm element facing the carrier element and is configured to induce at least a region of the diaphragm element to vibrate; at at least an edge region, the diaphragm element having a retaining region, which extends in the direction of the carrier element and embraces a subregion of the carrier element.
Abstract: A transducer array for an ultrasound imaging system includes a substrate and a single array comprising individual sub-sets of transducer elements disposed on the substrate, wherein the individual sub-sets are physically separate from each other and spatially arranged contiguous to each other. An apparatus includes a transducer array with a substrate and a single array comprising individual sub-sets of transducer elements disposed on the substrate, wherein the individual sub-sets are not in physical contact with each other and are serially arranged with respect to each other. The apparatus further includes transmit circuitry that conveys an excitation pulse to the transducer array, receive circuitry that receives a signal indicative of an ultrasound echo from the transducer array, and a beamformer that processes the received signal, generating ultrasound image data.
Abstract: Disclosed is a method of forming a transmission beam with a transducer array comprising a plurality of transducers, the method comprising: receiving at least one desired property for an intended transmission beam; determining an optimised operation parameter for a transducer of the transducer array based on the received at least one desired property and an array model for modelling a relationship between at least one beam property and at least one transducer protection property whilst taking into account of an acoustic mutual coupling of the plurality of transducers of the transducer array; and generating the transmission beam using the optimised operation parameter on the transducer array.
Abstract: One example includes an ultrasonic ranging system. The system includes an ultrasonic transducer configured to transmit an ultrasonic signal and to receive reflected ultrasonic signal paths having been reflected from a plurality of target objects during a ranging operation. The system also includes a ranging processor configured to detect a location associated with the plurality of target objects based on monitoring phase information associated with the reflected ultrasonic signal paths.
Abstract: Methods and systems for generating an image of a subterranean formation from recorded seismic data obtained in a marine seismic survey of a subterranean formation are described. Methods and systems compute a volume of migrated seismic data obtained from the recorded seismic data. Spectrally enhanced traces of the migrated seismic data are computed in overlapping windows of the volume of migrated seismic data. The spectrally enhanced traces of the volume of migrated seismic data are used to generate a spectrally enhanced image of the subterranean formation.
Abstract: An ultrasound scanning system includes a probe adaptor, a plurality of channel modules and a backend controller. The probe adaptor is connected to an ultrasound probe and has a plurality of frontend channels. Each of the channel modules has an identification code and includes a switch, a transmitter, a transmitter beamformer, a receiver and a receiver beamformer, wherein the switch is coupled to the probe adaptor, the transmitter is coupled to the switch, the transmitter beamformer is coupled to the transmitter, the receiver is coupled to the switch, and the receiver beamformer is coupled to the receiver. The backend controller is coupled to the probe adaptor, the transmitter beamformer of each of the channel modules and the receiver beamformer of each of the channel modules.
Abstract: A sensing device comprises a charge pump, a MEMS sensor, a source follower and a PGA. The charge pump is configured to provide a pump voltage. The MEMS sensor is electrically connected to the charge pump and configured to generate an input voltage according to environment variations. The source follower is electrically connected to the MEMS sensor and configured to generate a followed reference voltage according to the pump voltage and to generate a followed input voltage according to the input voltage. The PGA has an input end of the PGA electrically connected to the source follower and is configured to generate two-ended differential output voltages outputted through a first output end and a second output end according to a difference between the followed reference voltage and the followed input voltage.
Abstract: Systems and methods are disclosed for performing imaging with a crossed-electrode ultrasound transducer array, where ultrasound transducer array is configured for focusing in one direction via conventional time-delay phased array beamforming, and for focusing in a second direction via a Fresnel aperture formed via the application of bias voltages. The ultrasound transducer array connections are switched between transmit and receive operations, such that the Fresnel aperture is generated in the first direction upon transmit, and in the second direction upon receive. One or both of the transmit Fresnel aperture and the receive Fresnel aperture are configured as a set of delay-corrected Fresnel sub-apertures, where the delay associated with each Fresnel sub-aperture is selected to compensate for variations in path lengths between the Fresnel sub-apertures and the focal point.
Abstract: An audio capture device for a submersible camera including a supporting structure to prevent a waterproof membrane from deflecting beyond a point that will cause damage to the membrane. A microphone assembly includes a microphone for detecting ambient sound and generating an electrical signal representing the ambient sound. The microphone assembly is covered by a waterproof membrane to prevent water from reaching the microphone assembly. One or more supporting rings near the waterproof membrane prevents the waterproof membrane from deflecting more than a threshold deflection.
Abstract: A hull-fitted electronic device (2) for a vessel is provided. The hull-fitted electronic device is adapted to be attached to a seat (10) having a through hole (11), the seat being attachable to a hull (20) of the vessel such that the through hole of the seat is aligned with a through hole (12) of the hull. The hull-fitted electronic device comprises a transducer (16) adapted to generate a signal to be transmitted into the water outside the hull, and a housing (14) encapsulating the transducer and having a lower portion (3) and a flange portion (4). The lower portion and at least the portion of the flange portion located closest to the lower portion are covered by a surface (5) of a material (17) being watertight and transparent to the signal generated by the transducer. A portion of the surface forms a window (13) of the housing arranged to transmit the signal of the transducer.
Abstract: The invention relates to an arrangement for seismic acquisition the spacing between each adjacent pairs of receiver and sources lines is not all the same. Some receiver and/or source lines and/or receiver and/or source spacings are larger and some are smaller to provide a higher quality wavefield reconstruction when covering a larger total area or for a similar total area of seismic data acquisition while providing a wavefield that is optimally sampled by the receivers and sources so that the wavefield reconstruction is suitable for subsurface imaging needs.
Abstract: A light ranging system including a housing; a shaft defining an axis of rotation; a first circuit board assembly disposed within and coupled to the housing in a fixed relationship such that the first circuit board assembly is aligned along a first plane perpendicular to the axis of rotation, the first circuit board assembly including a plurality of first circuit elements disposed on a first circuit board; a second circuit board assembly spaced apart from the first circuit board assembly within the housing in a second plane parallel to the first plane and rotationally coupled to the shaft such that the second circuit board assembly rotates about the axis of rotation, the second circuit board assembly including a plurality of second circuit elements disposed on a second circuit board and aligned with and configured to function in wireless cooperation with at least one of the first plurality of circuit elements; and a light ranging device electrically connected to and coupled to rotate with the second circuit bo
December 4, 2018
Date of Patent:
April 6, 2021
Angus Pacala, Mark Frichtl, Marvin Shu, Eric Younge
Abstract: A three-dimensional space detection system, including: a locating base station, a label device to be located, and a computing device. The locating base station synchronizes a base time point to the label device to be located, sends an ultrasonic signal to the label device to be located, rotationally sends a first laser plane signal about a first rotation axis, and rotationally sends a second laser plane signal about a second rotation axis perpendicular to the first rotation axis. The label device to be located synchronizes a base time point from the locating base station, detects the ultrasonic signal, the first laser plane signal and the second laser plane signal.
Abstract: Multi-directional ultrasonic transducers useful for small downhole applications where two or more separate or larger transducers are too large. The transducer includes a backing material having two or more piezoelectric elements attached thereto. The piezoelectric elements are attached to the backing such that each elements transmit ultrasounds in different directions. An encapsulating material surrounds both the piezoelectric elements and the backing. Since the piezoelectric elements share the same backing and the same encapsulation, the form factor of the multi-directional transducer is greatly reduced in comparison to conventional transducer designs.
Abstract: An apparatus and method of measuring a level of fluid in a container and of enhancing reliability of an ultrasonic fluid measurement probe. A base comprises a transducer chamber, wherein the transducer chamber comprises a transducer chamber floor, a transducer chamber edge, and transducer chamber walls extending from the transducer chamber floor to the transducer chamber edge. An ultrasonic transducer is attached to the transducer chamber floor. A cap is welded to the transducer chamber edge such that the cap, along with the transducer chamber floor and the transducer chamber walls, encloses the transducer chamber to form an enclosed air space between the ultrasonic transducer and the cap.
Abstract: A tracking system includes a first device and a second device. The first device includes plural ultrasonic sources and an inertial measurement unit configured to detect inertial data. The second device includes at least one ultrasonic receiver and a processor. The processor is configured to receive the inertial data, estimate an orientation of the first device according to the received inertial data, determine a first ultrasonic transmitter from the ultrasonic transmitters according to the orientation of the first device and a location of the first device, and send an enablement command about the first ultrasonic transmitter to the first device. The enabled transmitter of the ultrasonic transmitters sends ultrasounds according to the enablement command, the at least one ultrasonic receiver is configured to receive the ultrasounds from the first ultrasonic transmitter, and the processor determines the location of the first device according to the received ultrasounds.