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

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: 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: 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.

Abstract: The present disclosure relates to a generally-applicable measurement technique based on coherent quantum enhancement effects and provides embodiments with nonlinear optics. The technique utilizes parametric nonlinear processes where the information-carrying electromagnetic quanta in a number of electromagnetic modes are converted phase coherently to signature quanta in a single mode or a few modes. The phase coherence means that while the quanta before conversion may have unequal or uncertain phase values across the modes, the signature quanta converted from those different modes have the (near) uniform phase. This can lead to significant increase in the signal to noise ratio in detecting weak signal buried in strong background noise. Applications can be found in remote sensing, ranging, biological imaging, field imaging, target detection and identification, covert communications, and other fields that can benefit from improved signal to noise ratios by using the phase coherent effect.

Abstract: A distance measurement system includes a light transmitter to generate a modulated light signal, a light sensor to generate measurement signals from reflected light among four quad phase angles with respect to a phase of the generated light signal, and a controller. The controller selects a first set of quad phase angles, and generates first measurement signals at the quad phase angles of the first set. Based on the first measurement signals, the controller computes a first phase angle between the generated light signal and the reflected light signal, generates a second set of quad phase angles based on the first phase angle, and generates second measurement signals at the quad phase angles of the second set. Further, based on the second measurement signals, the controller computes a second phase angle between the generated light signal and the reflected light signal and calculates a distance using the second phase angle.

Abstract: An underwater imaging system is disclosed. A boat sonar transducer is configured to transmit and receive sonar signals and generate an image of water and surfaces using received sonar signals. An active echo system is configured to be positioned within the water to remotely communicate with the boat sonar transducer. The active echo system includes an ultrasound transducer configured to detect sonar signals transmitted by the boat sonar transducer and transmit an active echo pulse, or a series of active echo pulses, back to the boat sonar transducer. A microprocessor is configured to drive the ultrasound transducer to transmit the active echo pulse, or series of active echo pulses, back to the boat sonar transducer in response to the ultrasound transducer detecting sonar signals transmitted by the boat sonar transducer.

Abstract: A three dimensional image measurement system including a first optical system and a second optical system is provided. The first optical system is adapted to output a structural light beam and a zero order light beam. There is an angle between the structural light beam and the zero order light beam. The first optical system performs an optical operation to project the structural light beam to a three dimensional object to obtain three dimensional information of the three dimensional object. The second optical system is adapted to receive the zero order light beam and perform another optical operation by using the zero order light beam. The first optical system includes a plurality of optical elements. The value of the angle between the structural light beam and the zero order light beam is determined according to position parameters of the optical elements.

Abstract: A time of flight sensor has a photosensitive image region (1) comprising a linear array of M pixels; a storage region (2) comprising M columns of N storage elements, and transfer circuitry to transfer data along the M columns of storage from an input storage element connected to a respective one of the M pixels along column of N storage elements to an output storage element at a transfer frequency Ft, each row of M storage elements storing data captured at the same time; and a readout section (3) arranged to read out data from the output end of the M columns of the storage region at a readout frequency Fr. In this way the readout frequency and transfer frequency may be separately controlled. An amplifier (4) may be connected to the readout section. An optical shield (5) may shield the storage elements leaving the photosensitive image region unshielded. The elements may be elements of a charge coupled array.

Abstract: The present disclosure relates to a method for identification of a noise point used for a LiDAR, comprising: receiving a point cloud generated by the LiDAR; obtaining at least one of reflectivity and continuity parameter of a point in the point cloud, and a distance between the point and the LiDAR; and determining whether the point is a noise point at least based on at least one of the reflectivity and the continuity parameter, and the distance.

Abstract: Provided are a beam steering apparatus, a method of driving the beam steering apparatus, and a light detection and ranging (LiDAR) system including the beam steering apparatus. The beam steering apparatus includes: a phase modulation device configured to modulate a phase of incident light and emit at least first emitted light and second emitted light; and a beam reflection device configured to reflect, to an object, at least one from among the first emitted light and the second emitted light. The phase modulation device includes a plurality of channels configured to independently modulate the phase of the incident light, and a binary phase profile is formed when one of first and second phase values ?1 and ?2 is applied to each of the plurality of channels.