Abstract: Acoustic absorbers are formed for ultrasound transducers. The acoustic absorber provides desired attenuation, impedance, and thermal conductivity qualities based on a filler of rubber, ceramic, and metal particles. The relative amounts of the different fillers may be adjusted to tune the acoustic attenuation, thermal conductivity, and/or acoustic impedance.

Abstract: Disclosed is an ultrasonic sensor control device including a transmission control section configured to control a transmitting device configured to transmit a transmission ultrasonic wave, a receiving section configured to receive a reception ultrasonic wave, a frequency determining section configured to determine a result of comparing a reception frequency that is a frequency of the reception ultrasonic wave received by the receiving section and that is a frequency capable of being received by the receiving section, with a transmission frequency of the transmission ultrasonic wave that is transmitted under the control of the transmission control section, and a frequency switching section configured to change the transmission frequency and the reception frequency on the basis of a result of the determination by the frequency determining section.

Abstract: This disclose relates to a robust method for automatic real-time monitoring or post-job evaluation of hydraulic fracturing operations based on predictive deconvolution of the wellhead pressure oscillations.

Abstract: An object detection device includes a drive signal generation unit provided to generate a drive signal for driving a transmitter configured to transmit a search wave to the outside, and a control unit provided to control output of the drive signal from the drive signal generation unit to the transmitter. The drive signal generation unit generates a first drive signal corresponding to a first search wave and a second drive signal corresponding to a second search wave having an encoding scheme that is different from the encoding scheme of the first search wave. The control unit causes the drive signal generation unit to output the first drive signal and the second drive signal to the transmitter at different timings so that one of the first and second search waves is transmitted in a transmission interval between transmissions of the other search wave.

Abstract: The present invention relates to a method for receiving data transmitted acoustically. The method includes the steps of receiving an acoustically transmitted signal; and decoding the signal using, at least, a first plurality of voters to extract the data. The first plurality of voters comprise differing values for a first acoustic characteristic to address interference. A system and software are also disclosed.

Abstract: The invention relates to a method for operating ultrasonic sensors) for a motor vehicle, including emitting a plurality of ultrasonic signals by respective ultrasonic sensors. The ultrasonic signals include a sequence of elementary signals. The elementary signals have signal pauses and a plurality of different signal pulses. The ultrasonic signals differ from one another by the sequence of the elementary signals. The method further includes receiving reflected ultrasonic signals, wherein the received ultrasonic signals are associated with the emitted ultrasonic signals on the basis of the sequences of the elementary signals.

Abstract: A fish finder system for a vessel is provided with an interface to connect with a transducer configured to transmit an ultrasonic signal into a water body and receive a reflected echo signal, and an autopilot device configured to control a rudder being attached to the vessel. Further, the fish finder system is provided with processing circuitry communicatively coupled to the interface and configured to detect a position of a fishing rig, measure a vector from the vessel to the fishing rig, and generate a rudder control signal for the autopilot device to control the rudder based on the measured vector.

Abstract: A method and apparatus for evaluating light-weight cement (LWC) bond conditions in production well in presence or absence of the tubing. The apparatus includes a tool string that can be lowered into the casing or the tubing. The tool string includes a segmented transducer ring matrix to excite the surrounding medium resulting in vibrations. The tool string further includes an impedance measurement circuit that can determine natural resonance frequencies of the structural components. The impedance measurement circuit can determine certain non-harmonic resonance mode shapes for mechanical impedance measurements that are sensitive to the LWC bond conditions. A machine learning model can be used for segmented impedance measurements to correct effects from the tubing eccentricity inside the casing. Lab calibration generates bond index mapping table and the field logging impedance measurement data can be processed into the bond indexes to further evaluate LWC bond conditions.

Abstract: A sonar target locking system to position a sonar assembly to maintain the sonar array of the sonar assembly pointing at a position of a user-set (desired) target even when the watercraft is rotating or moving in various motions. The sonar target locking system includes electro-mechanical assembly that can be steered electrically to maintain the sonar array pointing at the position of the desired target. The system may be activated using at least one of a foot pedal, handheld remote control, or a display of a fish finder head unit. The system may use GPS and IMU inputs to generate control signals to steer the electro-mechanical assembly to maintain the sonar array pointing at the position of the desired target.

Abstract: A communication system (1) comprising a first and a second underwater wearable device to be worn by a swimmer at mutually distant locations is disclosed herein. The communication system is configured to derive information pertaining to the swimmer from properties of a version of the acoustic signal transmitted from a first communication module of the first underwater wearable device to a second communication module of the second underwater wearable device.

Abstract: A synchronization wire for synchronizing sonar ping transmissions from sonar transducer elements or arrays is provided. The synchronization wire includes first and second connection points. The first connection point is configured to connect the synchronization wire to a first sonar module that is configured to control transmission of a first sonar ping from a first sonar transducer. The second connection point is configured to connect the synchronization wire to a second sonar module that is configured to control transmission of a second sonar ping from a second sonar transducer. The synchronization wire is configured to transfer an electrical current between the first and second sonar modules. The synchronization wire is configured to enable synchronization of the first and second sonar modules through the use of the electrical current. Processing circuitry in sonar modules may cause or prevent transmission of sonar pings based on the voltage level on the synchronization wire.

Abstract: Sonar steering systems offering improved functionality and ease of use for an operator (e.g., an angler) are provided. A sonar steering system is configured to automatically adjust the directional coverage volume of the sonar system in a hands-free manner to allow the operator to focus on other tasks. Some such sonar steering systems are configured to adjust the directional coverage volume of the sonar transducers to maintain a target such as an area of interest (AOI) within the sonar display despite movement of the watercraft relative to the target. Accordingly, the coverage volume may be automatically adjusted to maintain the aim of the sonar transducers at a target that is moving through the water, such as a school of fish.

Abstract: A location position system can include a plurality of beacons arranged a grid formation divided into a plurality of sub-grids. A mobile computing device can implement a location position application and can receive a radio signal from a particular beacon of the plurality of beacons. The radio signal can comprise a data component uniquely identifying the particular beacon, which can be used to identify a particular sub-grid of the plurality of sub-grids. An audio signal can be received from each of a set of sub-grid beacons associated with the particular sub-grid. Each audio signal can: (i) have a frequency in the frequency range of 16 kHz to 24 kHz and a transmission delay from a reference time, (ii) lack any additional identifying data, and (iii) be separately transmitted from the radio signal transmitted by the particular beacon. The mobile computing device can determine its position based on the received audio signals.

Abstract: A stern operatively mounted universal transducer for boat includes a mounting device, having upper and lower brackets, for securement to the boat, preferably its transom, the upper and lower brackets secure a drive cylinder, which when operative, lowers a drive rod for shifting a sonic transducer upwardly above the water, or downwardly into the water to scope the surrounding underwater typography. A pair of guide rods shiftably extend through the upper and lower brackets, and at their upper ends, secure to a motor and gear housing, the guide rods at their lower ends secure to a base plate. A transducer shaft extends into the motor housing which provides for its pivoting, and at its lower end, extends downwardly through the base plate, and secures a transducer mounting plate, to which the transducer is affixed, in preparation for its usage.

Abstract: The invention relates to a method for determining a functional status of an ultrasonic sensor (5a) of an ultrasonic sensor device (5) for a motor vehicle (1), which is designed to emit an ultrasonic signal (8) into an environment (4) of the motor vehicle (1) and/or to receive an echo signal (9) of the ultrasonic signal (8), wherein an electrical test signal (P) is generated, which is applied to the ultrasonic sensor (5a), wherein at least one electrical characteristic parameter (K) of the ultrasonic sensor (5a) affected by the electrical test signal (P) is evaluated and as a function thereof a transfer function (13) of the ultrasonic sensor (5a) is determined, which is compared with a reference transfer function (11) and the functional state of the ultrasonic sensor (5a) is determined depending on the comparison.

Abstract: Smart glasses including a first audio device, a second audio device, a frame including a first portion, a second portion, and a third portion, the second portion and the third portion are moveable in relation to the first portion, the second portion including the first audio device and the third portion including the second audio device, and a processor configured to cause the first audio device to generate a signal, receive the signal via the second audio device, estimate a distance based on the received signal, and determine a configuration of the frame.

Abstract: A marine survey system and method for ultrahigh resolution (UHR) mapping of a marine bottom (B) below a body of water (W) by means of a frame (20) towed as a whole by one or more towing cables (12) at a distance (Xf) behind a marine vessel (10) moving over the water (W) in a movement direction (V). The frame (20) comprises a rigid framework (23) and a plurality of independent acoustic sources (21), wherein each acoustic source (21) is independently controlled to emit a separate acoustic wave (A) propagating through the water (W) and reflecting off bottom regions of the marine bottom (B) for the mapping thereof. The acoustic sources (21) are kept fixated by the rigid framework (23) at a source-to-source distance (Ys) less than four meters in a transverse direction (Y) perpendicular to the movement direction (V) of the vessel (10) to distinguish the bottom regions with an ultrahigh resolution (Ry) of less than two meters at least in the transverse direction (Y).

Abstract: A method for estimating structural vibration in real time includes steps described below.

Abstract: The present invention is directed to a transducer module including a two-piece protective assembly offering mechanical protection for one or more transducer elements (i.e., transmitter(s) and/or receiver(s)) provided within. The two-piece protective assembly comprises an internal rigid housing including a cavity formed by a set of walls or projections extending from a rear portion thereof. The cavity is shaped and/or sized to receive the one or more transducer elements within. The two-piece protective assembly further includes a cover overmolded and coupled to the rigid housing and sealing the one or more transducer elements within the cavity of the housing.

Abstract: A digital transmit beamformer for an ultrasound system has a waveform sample memory which stores sequences of samples of different pulse transmit waveforms of differing pulse widths. The memory is shared by a plurality of transmit channels, each of which can access its own selected sample sequence, independent of the selections by other channels. Waveform sample readout by the channels occurs substantially simultaneously during a transmit event, producing a transmit beam from a transmit aperture with different pulse waveforms applied to different elements of the transmit aperture. Higher energy waveforms with wider pulse widths are applied to central elements of the aperture and lower energy waveforms with narrower pulse widths are applied to lateral elements of the aperture to produce an apodized transmit beam.