Abstract: Apparatuses, systems, and methods include a PMUT mechanically coupled to, and electrically isolated from, a receive sensor via a common flexible membrane. The receive sensor may be an optical sensor or a receive only PMUT providing a feedback signal based on a received waveform, VRO(t), to modify the drive voltage Vd(t) of the PMUT. The feedback signal may be used to modify the drive voltage Vd(t) of the PMUT to shorten the ring-down period and may be based on the received waveform, VRO(t), and a desired receive waveform, VROD(t), which may be selected to optimize one or more of Q, bandwidth, resonant frequency, and spectral content of the drive voltage Vd(t). The drive voltage Vd(t) may be modified to a minimize a difference between VRO(t), and a desired receive waveform, VROD(t), or a closed loop weighted (?, ?) sum of the energy of VRO (t) and the blind zone duration.

Abstract: The present invention discloses a system for bridge scour multi-source monitoring, including an intelligent monitoring system, a data industrial personal computer, a 5G remote communication transmission system and a remote scour depth evaluation center. The intelligent monitoring system consists of three subsystems including a high-frequency real-time bridge dynamic characteristic monitoring system, an adjustable sound velocity underwater depth monitoring system and a scoured seabed soil pressure change testing system, which are coupled with one another to carry out triggering control to acquire lateral pile data, thereby forming a multi-source bridge local scour real-time sensing monitoring system, and realizing integration of clock synchronization, dynamic control of scour environment conditions, contact sensors and non-contact sensors.

Abstract: A neural phantom device configured and arranged to produce a magnetic field to simulate a neural signal. The neural phantom device includes a driver having a signal source configured to produce a simulated neural signal, and either i) a carrier wave source configured to produce a carrier wave having a frequency of at least 250 Hz or ii) an optical carrier wave source configured to produce an optical carrier wave, wherein the driver is configured to modulate the simulated neural signal using the carrier wave or optical carrier wave to generate a modulated signal. The neural phantom device also includes a phantom configured to receive the modulated signal, demodulate the modulated signal to recover the simulated neural signal, and generate the magnetic field in response to the simulated neural signal.

Abstract: A method and system for generating an acoustic log. The method may comprise disposing an acoustic logging tool in a wellbore, broadcasting a shaped signal with the acoustic logging tool such that the shaped signal interacts with a boundary of a casing and a material, recording a result signal from the boundary with the acoustic logging tool, and decomposing the result signal into a resonance mode. The method may further comprise applying a bandpass filter to the resonance mode to form a filtered signal, selecting a baseline signal from the filtered signal, removing the baseline signal from the filtered signal, and generating a log from the filtered signal. The system may comprise an acoustic logging tool. The acoustic logging tool may comprise at least one transmitter and at least one receiver. The system may further comprise a conveyance and an information handling system communicatively connected to the acoustic logging tool.

Abstract: A display system of a vehicle includes a person detection device that detects a person on one side of the vehicle in a top view of the vehicle, a display device provided on the vehicle exterior on the side opposite to the one side of the vehicle, and a controller that controls the display device. When the person detection device detects a person, the controller controls the display device to display a warning indicating presence of the person, on a display of the display device.

Abstract: A high-frequency dynamic pressure transducer calibration system and method is provided. The method directs a source onto a diaphragm of a dynamic pressure transducer. An oscillating voltage at a target frequency (or range of frequencies) is generated. The oscillating voltage is coupled to an electrical connector of the dynamic pressure transducer. A deflection pattern of the diaphragm is recorded. The dynamic pressure transducer is calibrated by correlating magnitude of the deflection pattern with the oscillating voltage as a function of the target frequency (or range of frequencies).

Abstract: Disclosed are a directional acoustic sensor, a method of adjusting directional characteristics using the directional acoustic sensor, and a method of attenuating an acoustic signal in a specific direction using the directional acoustic sensor. The directional acoustic sensor includes a plurality of resonance units arranged to have different directionalities and a signal processor configured to adjust directional characteristics by calculating at least one of a sum of and a difference between outputs of the resonance units. In this state, the signal processor attenuates an acoustic signal in a specific direction by using a plurality of directional characteristics obtained by calculating at least one of the sum of and the difference between the outputs of the resonance units at a certain ratio.

Abstract: A scanning device is provided. The scanning device includes a frame having a first portion and a second portion pivotably coupled to the first frame portion. The scanning device also has a first set of wheels coupled with the first frame portion and a second set of wheels coupled with the second frame portion. In addition, the scanning device has a rail movably disposed on the first frame portion that includes a channel and a rail along with a rail arm coupled with the channel. The scanning device has a sensor assembly that includes sensor forks, a sensor coupled with the sensor forks and a sensor arm. The sensor arm is coupled with the sensor forks and with the rail arm. In addition, the sensor is adjustable between a first position and a second position via the rail.

Abstract: Methods for sensing formation properties while drilling a well are described. An antenna system and transceiver electronics system are disposed on a drill collar segment. The antenna system includes at least one transmitter antenna for creating an electromagnetic field and at least one receiver antenna for detecting the electromagnetic field. At least one antenna in the antenna system is a magnetic dipole based antenna having at least two slot based magnetic dipoles. The slot based magnetic dipoles include slots in an outer surface of the drill collar segment, wire holes beneath the outer surface connecting the slots with each other and with the transceiver electronics system, a ferrite rod placed in each slot, and, at least one continuous antenna wire passing through the slots and the wire holes.

Abstract: A multi-core cable testing device is configured to specify a correspondence between ends of an insulated wire at both ends of a multi-core cable including insulated wires. The device includes a signal input unit for inputting a test signal by capacitive coupling into one end of the insulated wire as a testing object at one end of the multi-core cable, a signal output unit for outputting the test signal by capacitive coupling from each end of the insulated wires at the other end of the multicore cable, a correspondence specifying unit for measuring a voltage of the test signal from the signal output unit and for specifying an other side end of the insulated wire based on a measured voltage. At least one of the signal input unit and the signal output unit includes a signal transmission cable for transmitting the test signal and a substrate configured to be connected to the signal transmission cable.

Abstract: The invention relates to a method for operating an ultrasonic sensor (4) of a vehicle (1), in which a sound transducer element (11) of the ultrasonic sensor (4) is excited with a predetermined excitation signal, wherein the excitation signal has a predetermined current amplitude, an electrical test voltage (U) at the sound transducer element (11) resulting from the excitation signal is measured, and a diagnosis of the ultrasonic sensor (4) is carried out on the basis of the test voltage (U), wherein the ultrasonic sensor (4) is excited with the excitation signal in a measuring mode for the transmission of an ultrasonic signal, the electrical test voltage (U) is measured during the transmission, on the basis of the electrical test voltage (U) a reduced diagnosis is carried out, wherein the ultrasonic sensor (4) either continues to be operated in the measuring mode or is operated in a diagnostic mode for a complete diagnosis, depending on a result of the reduced diagnosis.

Abstract: A system includes a communications interface configured to receive a plurality of data series captured by a plurality of sensors. A first database includes at least a first data series of the plurality of data series. A second database includes metadata related to the first data series. One or more processors are configured to receive an instruction including an indication of a computation to perform and metadata filter criteria, query the second database to determine at least a portion of the first data series that satisfies the metadata filter criteria by reference to at least the metadata related to the first data series, access, from the first database and based on results of the query of the second database, the portion of the first data series, and perform the computation on the portion of first data series accessed from the first database.

Abstract: A marine seismic streamer includes plural concentrators, plural segments interposed with the plural concentrators so that a concentrator of the plural concentrators is sandwiched between two segments of the plural segments, a first high-voltage rail HV1 that extends along the plural concentrators and the plural segments, and a second high-voltage rail HV2 that extends along the plural concentrators and the plural segments. In each given concentrator i of the plural concentrators, there is a first switch SW1 placed along one of the first high-voltage rail HV1 and the second high-voltage rail HV2, a second switch SW2 placed between the first high-voltage rail HV1 and the second high-voltage rail HV2, a first local controller implemented in hardware, and a second local controller implemented in a combination of hardware and software, and having an operating system, the first local controller being separated from the second local controller.

Abstract: A core flooding system includes a core holder that encloses a core sample of a subterranean formation. The core holder includes a fluid inlet and a fluid outlet; at least one sensor coupled to the core holder or positioned in the inner volume of the core holder; an acoustic vibrating assembly coupled to the core holder; and a control system communicably coupled to the at least one sensor and the acoustic vibrating assembly. The control system performs operations including operating the acoustic vibrating assembly to transmit at an acoustic wave energy or a vibration energy to the core holder; during the transmission of the at least one of the acoustic wave energy or the vibration energy to the core holder; measuring at least one parameter of the core sample; and based on the at least one measured parameter, determining at least one property of the core sample.

Abstract: A method for calibrating an acoustic calibration tank providing the tanks with reference hydrophones positioned along the tank. The tank is filled with a fluid at a known temperature and pressure. A calibrated reverse hydrophone is positioned in the tank, opposite one of the reference hydrophones. A known acoustic wave is created in the tank using the calibrated reverse hydrophone and the opposite reference hydrophone output is measured. Free field voltage sensitivity is computed for the reference hydrophone. This gives the calibration factor for the reference hydrophone. The calibrated reverse hydrophone can be repositioned. An iterative process can be utilized for the other reference hydrophones, and other known pressures and temperatures.

Abstract: A detectable range is increased in a radar apparatus that measures a distance from a round-trip time of a sound wave. A transmitting unit transmits a plurality of sound waves including different frequency components in order. A receiving unit receives reflected waves obtained as the plurality of sound waves is reflected. An analyzing unit analyzes a frequency component of each of the reflected waves and identifies, for each reflected wave, the sound wave corresponding to the reflected wave among the plurality of sound waves on the basis of the analysis result. A ranging unit acquires a distance corresponding to a period of time from a transmission time of the sound wave corresponding to the reflected wave to a reception time of the reflected wave.

Abstract: An apparatus includes a schlieren imaging assembly and a processor. The schlieren imaging assembly includes one or more two-dimensional (2D) schlieren imaging systems and is configured to acquire two-dimensional (2D) schlieren images of turbulence occurring in fluid media from a plurality of viewing angles. The processor is configured to produce, from the 2D schlieren images, a time-series of three-dimensional (3D) schlieren images corresponding to respective time instances.

Abstract: Disclosed are a directional acoustic sensor, a method of adjusting directional characteristics using the directional acoustic sensor, and a method of attenuating an acoustic signal in a specific direction using the directional acoustic sensor. The directional acoustic sensor includes a plurality of resonance units arranged to have different directionalities and a signal processor configured to adjust directional characteristics by calculating at least one of a sum of and a difference between outputs of the resonance units. In this state, the signal processor attenuates an acoustic signal in a specific direction by using a plurality of directional characteristics obtained by calculating at least one of the sum of and the difference between the outputs of the resonance units at a certain ratio.

Abstract: An apparatus for processing crop, animal feed or components with a drivable tool and at least one NIR sensor system for determining at least feed values, having a scanning head with a spectrometric sensor and at least one light source behind a transparent pane which can be passed by the feed, comprises in a housing of the NIR sensor system a calibration surface, the appearance of which is different from the appearance of the feed to be scanned on the pane, wherein the scanning head is actively adjustable for calibration between a scanning position aligned with the pane and a calibration position aligned with the respective calibration surface.

Abstract: Methods, systems, and computer-readable medium to perform operations for suppressing seafloor geophone seismic data noise. A computing system applies a vertical geophone de-noise process to enhance a compressional wave signal that is free from (independent of) shear energy leakage. This enhances the signal to noise (S/N) ratio of the vertical geophone component and concurrently make the vertical geophone component consistent with a hydrophone component.

Abstract: A method is provided to measure a modulus of complex sensitivity of hydrophone data channels using a quasi-diffuse sound field. In the method, a radiation pattern representing shallow water sources directs to a location as a direct acoustic path and sound reflects to the location from the water bottom as a reflected acoustic path. At least one hydrophone receives the sounds at the location as acoustic signals with an acoustic intensity being the sound intensities along the acoustic paths. The sound intensity at the hydrophones also relates to a zenith angle and a bottom intensity reflection coefficient. The modulus of the frequency dependent sensitivity of the hydrophone is computed from measurements of the voltage output and voltages of reference hydrophones with the sound intensity as factor and with uncertainty reduced by averaging hydrophone sensitivities.

Abstract: An acoustic monitoring system characterizes, classifies, and geo-locates anthropogenic and natural sounds in near real time. The system includes a compact array of three acoustic vector sensors, which measures acoustic pressure and the three-dimensional particle velocity vector associated with the propagation of an acoustic wave, thereby inherently providing bearing information to an underwater source of sound. Beamforming techniques provide sound source localization, allowing for characterization of the acoustic signature of specific underwater acoustic sources.

Abstract: A system and method directed to inspecting a high density polyethylene pipe. The system includes a pipe inspection tool that is positioned about a fused polyethylene pipe joint. The inspection tool may include search units, a pipe carriage, a pulser and a phased array testing instrument programmed to adjust an amplitude response signal from the search units based on a vertically established time corrected gain curve. The inspection tool is rotated around the high density polyethylene pipe joint while propagating acoustical waves at various patterns and angles through the polyethylene pipe joint. Prior to the joint inspection, the inspection tool is calibrated using a calibration tool which includes a block having an array of equal sized bores positioned along different axis' through the block's depth. The block is constructed of the same material type and grade as the pipes that were fused together to form-the polyethylene pipe joint.

Abstract: This disclosure sets forth a system for detecting and determining the onset times of one or more impulsive acoustic events across multiple channels of audio. Audio is segmented into chunks of predefined length and then processed for detecting acoustic onsets, including cross-validating and refining the estimated acoustic onsets to the level of an audio sample. The output of the system is a list of channel-specific timestamped indices corresponding to the audio samples of the onsets of each impulsive acoustic event in the current segment of audio.

Abstract: A method of forming a sound lens having a coating of a first metal, that utilizes a lens-shaped piece of heat resistant material, having a convex major surface, and having a sonic impedance similar to that of human tissue, taken from a group consisting essentially of high temperature plastics and silicone. In the method, the convex major surface is sputter coated with a layer of the first metal, less than 10 microns thick.

Abstract: Ping-based imaging systems may be used for tracking motion of hard or soft objects within an imaged medium. Motion detection and motion tracking may be performed by defining fingerprint points and tracking the position of each fingerprint point based on the echoes of multiple transmitted pings.

Abstract: In a driver for a piezo-electric transducer, when a converter circuit and a sensing circuit are the same circuit, many limitations exist on the accuracy of the sensing, due to multiple parasitic effects arising from the interconnection of the power devices. These limitations may limit viability of the sensing for many applications, in particular an accurate determination of when the force on the piezo-electric transducer is fully removed. Providing an additional switch in the sensing circuit configured to repeatedly zero the sensed voltage across the piezo-electric transducer each time the sensed voltage reaches a threshold voltage generates a plurality of voltage segments between zero and the threshold voltage. Accordingly, a controller may then be configured to generate a digital reconstruction of the sensed voltage across the piezo-electric transducer by adding the plurality of voltage segments.

Abstract: The invention discloses a rock damage acoustic monitoring system including an acoustic emission sensor installed in a borehole of a monitored rock mass and a ground workstation. The acoustic emission sensor is composed of an acoustic emission probe and a probe installation mechanism for installing the acoustic emission probe and a transmission mechanism for transmitting the probe installation mechanism. The probe installation mechanism includes a shell, a probe sleeve installed in the shell, an end cap fixed on the upper end surface of the probe sleeve, and a piston hydro-cylinder arranged between the top of the inner wall of the shell and the end cap. The present invention realizes the control of the moving direction of the shell and the probe sleeve by the piston hydro-cylinder component and the hydraulic pump.

Abstract: The present disclosure relates to an inline sensor including a housing fixable in a wall of a fluid line or a process container. A first transducer for detecting a primary measurand of a medium contained in the fluid line or the process container is integrated into the housing and designed to generate first measurement signals dependent on the primary measurand. A sensor electronics is connected to the first transducer for detecting the first measurement signals and designed to process the first measurement signals. The inline sensor is additionally designed to detect pressure surges occurring in the process container.

Abstract: A system for wireless power delivery including one or more transmitters and receivers. A method for wireless power delivery, preferably including: determining transmitter-receiver proximity; determining transmission parameter values, preferably including determining initial parameter values, evaluating candidate transmission parameter values, performing one or more local optimum searches, and/or performing one or more global optimum searches; and transmitting power based on the transmission parameter values.

Abstract: Various embodiments may provide an airborne system for measuring meteorological parameters, including a high altitude unmanned aerial vehicle (UAV) formed completely or partially of closed-cell polyurethane foam. In various embodiments, the UAV may include extendable wings configured to extend and retract as the UAV climbs and descends to different altitude levels. In various embodiments, the UAV may include one or more infrasonic sensors and wind screening configured to measure one or more meteorological parameters, such as wind shear, seismic waves, magnetic storms, magnetohydrodynamic waves, severe weather, tornadoes, hurricanes, meteors, and lighting. The infrasonic sensors may be configured to determine wind shear at the local and regional level. In various embodiments, other meteorological sensors may also be included in/on the UAV in addition to the infrasonic sensors.

Abstract: A system adapted to provide alert signals to individuals or institutions and/or control signals to utilities control units to automatically stop the flow of gas, water, electricity, oil, etc., such signals being delivered in response to the detection of seismic events, the detection occurring via ground-based monitoring systems and/or satellite-based monitoring systems. The alert and/or control signals are distributed through various broadcasting systems or similar channels of communication, such as radio frequency transmitters, Internet service providers, cell phone wireless carriers, satellite phone service providers and/or security monitoring service providers, to individuals and/or facilities through smartphones, landline telephones, tablets, PC's, voice-controlled web communication devices or the like and/or to signal receivers on utilities control units.

Abstract: Disclosed is a device, suitable for use as an acoustic resonator, including a base adapted to be coupled to at least one acoustic wave generator, a spacer including an aperture and a reflector, wherein the base includes a protruding part having a thickness t; the aperture of the spacer is complementary to the protruding part of the base; the device further includes a housing having an aperture complementary to the protruding part of the base and wherein the inner edge of the aperture has the same thickness t than the protruding part; and the housing is positioned between the spacer and the reflector, such that the thickness of the inner edge of the spacer defined the thickness of a cavity between the protruding part and the reflector. Also disclosed is a method of trapping particles in a fluid.

Abstract: Techniques for gunshot detection in an indoor environment are disclosed. A gunshot sensor is placed in the indoor environment. The gunshot sensor includes multiple individual sensors, including, but not limited to, an acoustic sensor and an infrared sensor. A firearm typically emits energy within the infrared spectrum when fired. This energy is detected by the infrared sensor. A firearm also typically emits an acoustic pressure wave when fired. The acoustic sensor detects the acoustic pressure wave. A strobe from a fire alarm occurring near in time to the gunshot can cause false gunshot detection. The infrared sensor information and the acoustic sensor information are analyzed to determine that a gunshot has occurred. The gunshot determination takes place independently of the location of the gunshot sensor. The strobe occurrence is evaluated to provide gunshot false alert detection. Reverberations are not used in the determination of a gunshot false alert.

Abstract: According to an embodiment, there is provided a system and method for generating a 3 axis perspective view data set in a 360° VR video editing system. One embodiment involves the monitoring of both the view position of a VR headset and the interaction activities of controller devices interacting with the editing software and afterwards automatically utilizing the gathered data to automatically generate output video works in 360° format and 2D format.

Abstract: An illustrative controller embodiment includes: a transmitter that causes reverberation of a piezoelectric transducer; and a linear damping module that measures characteristics of the reverberation and tunes at least one of a shunt resistance and a shunt reactance for the piezoelectric transducer based on said characteristics. An illustrative sensor embodiment includes: a piezoelectric transducer; and a transducer controller coupled to the piezoelectric transducer to transmit pulses and receive echoes for measuring distances. The controller includes a linear damping module with: a shunt resistance; a shunt inductance; and an optional switch that couples the shunt resistance and shunt inductance in parallel to the piezoelectric transducer to damp reverberation of the piezoelectric transducer after said transmit pulses. The controller measures at least one characteristic of said reverberation and responsively tunes the shunt resistance or the shunt inductance.

Abstract: Systems and methods of performing a seismic survey are provided. The system includes a seismic data acquisition unit having a transmitter window disposed in a first aperture of a lid, and having a receiver window disposed in a second aperture of the lid. A first gasket is positioned between the transmitter window and the first aperture to provide a clearance greater than a threshold to allow the transmitter window to deform. A second gasket is positioned between the receiver window and the second aperture to provide a clearance greater than the threshold to allow the receiver window to deform. At least one of the transmitter window and the receiver window of the seismic data acquisition unit are configured to pass at least one of optical and electromagnetic communications to or from an extraction vehicle via at least one of a transmitter window and a receiver window of the extraction vehicle.

Abstract: This device combines multiple elements that function like a single smart antenna that performs both connectivity and spatial discrimination functions. The antenna functions in both receive and transmit modes. The apparatus utilizes commonly used components to distinguish and separate desired satellite signals from those signals of satellites in close directional proximity. Disclosed are six methods for optimizing simultaneously reception of multiple desired satellite signals performed either mechanically or electronically and also included is an optimization technique. The transmission apparatus uses many of the same components as the receiver antenna and additionally uses in-beam nulling to fine tune transmission.

Abstract: A method of testing a capacitive transducer circuit, for example a MEMS capacitive transducer, by applying a test signal via one or more capacitors provided in the transducer circuit.

Abstract: A method of adjusting flaw detection sensitivity on an array ultrasonic probe comprises disposing a plate material P1 oppositely to the ultrasonic probe such that an upper surface of the plate material is disposed to be approximately parallel to an array direction of the transducers 11, or disposing a tubular material P2 oppositely to the ultrasonic probe such that an axial direction of the tubular material is disposed to be approximately parallel to the array direction of the transducers. Ultrasonic waves are transmitted from each transducer toward the upper surface of the plate material or an outer surface of the tubular material, and echoes are received from the bottom surface of the plate material or an inner surface of the tubular material on each transducer. Flaw detection sensitivity of each transducer is adjusted to substantially equalize intensity of an echo received on each transducer.

Abstract: Systems and methods are disclosed for passively detecting air turbulence using one or more infrasonic sensors mounted on an aircraft. The system may include one or more infrasonic sensors that are mounted on the aircraft and configured to detect infrasound. The system may also include a processor configured to receive output signals from the one or more infrasonic sensors and detect air turbulence away from the aircraft based on the output signals received from the one or more infrasonic sensors. The detected air turbulence may include natural or man-made turbulence including wake turbulence, clear air turbulence, mountain waves, or events such as a rocket launch.

Abstract: Ping-based imaging systems may be used for tracking motion of hard or soft objects within an imaged medium. Motion detection and motion tracking may be performed by defining fingerprint points and tracking the position of each fingerprint point based on the echoes of multiple transmitted pings.

Abstract: A plurality of transmission antennas include Nt1 transmission antennas arranged in a first direction and Nt2 transmission antennas arranged in a second direction orthogonal to the first direction, a plurality of reception antennas include Na1 reception antennas arranged in the first direction and Na2 reception antennas arranged in the second direction. In the first direction, an inter-element space between any two of the Nt1 transmission antennas and an inter-element space between any two of the Na1 reception antennas are each a value which is a product of a first space and an integer and are all values different from each other, and in the second direction, an inter-element space between any two of the Nt2 transmission antennas and an inter-element space between any two of the Na2 reception antennas are each a value which is a product of a second space and an integer and are all values different from each other.

Abstract: A microphone test device is provided to test a sound-receiving function of an under-test microphone. The microphone test device includes a test platform, a standard speaker module, a fixing mechanism and a pedestal. A sleeve of the standard speaker module includes a cone-shaped channel. A test acoustic wave from the standard speaker is centralized by the cone-shaped channel. Consequently, the interference of the acoustic wave reflection phenomenon is effectively reduced.

Abstract: The present disclosure refers to a method for measuring thickness in any type of carbon fiber component, even in components having parts with different thickness and integrating at least a second material. The method includes measuring with the maximum and minimum real thickness of the component, and measuring with ultrasonic equipment the time that the ultrasound takes to propagate across the component part with maximum and with minimum thickness, calculating a thickness correction value, and calculating an ultrasound test speed from said thickness correction value, said measured times, and said measured maximum and minimum real thickness. Then, the total thickness of each of the parts of the component are measured, using ultrasounds with the same calculated ultrasound test speed, and the thickness correction value is applied to each of the measuring total thickness of each part, to determine a corrected carbon fiber thickness for each part.

Abstract: Generally, a sonde, associated components and methods are described which can be used in conjunction with an inground tool having an inground tool housing that defines an inground tool cavity such that the inground tool cavity is exposed to an ambient pressure environment which surrounds the inground tool during an inground operation. A sonde housing assembly includes an exterior configuration that is receivable within the inground tool cavity. The sonde housing assembly at least partially defines a sonde interior and is further configured for receiving the pressure sensor body of a pressure sensor in a pressure sealed engagement. A sonde electronics package is supported within the sonde interior and is at least configured to receive the pressure signal and transfer a corresponding pressure signal from the sonde.

Abstract: An acoustic testing system includes at least four control microphones, at least four acoustic transducers, an acoustic enclosure with pre-determined reverberant characteristics which contains the at least four control microphones and the at least four acoustic transducers, a control system configured to produce a predetermined acoustic field as measured by the at least one control microphone. A unit under test is also disposed within the acoustic enclosure. Using an acoustic enclosure with pre-determined reverberant characteristics results of the increased proportion of reflected sounds in the area proximate to the unit under test such that less power is required to achieve a given acoustic test level than in a purely direct field acoustic test.

Abstract: A method and a system of analyzing multiphase fluid flow in at least one well or pipeline is provided, the method comprises characterizing slug flow in the multiphase fluid flow by receiving a plurality of well pressure data from the at least one well, processing the plurality of well pressure data to obtain a time-varying slug amplitude and/or a time-varying slug period for slugs in the slug flow, analyzing the slug amplitudes and/or the slug periods over a period of time to thereby determine a measure of well performance. Also an oil field monitoring system for an oil field comprising a plurality of wells is provided. Each well has a pressure gauge installed to measure a well pressure and is connected to a multiphase fluid flow analyzing system. An oil field unit receives the measure of well performance from the multiphase fluid flow analyzing system, and output the measures of well performance for each of the plurality of wells.

Abstract: A method of calibrating an ultrasound probe includes mounting an ultrasound probe onto a calibration system, transmitting an ultrasound test signal from an element of the probe through a test medium of the calibration system, and receiving the test signal on a matrix of hydrophones such that an element's position relative to other elements and other arrays within the same probe can be computed. Further, the system described herein is configured to detect the acoustic performance of elements of a probe and report the results to an end user or service provider.

Abstract: A plurality of transmission antennas include Nt1 transmission antennas arranged in a first direction and Nt2 transmission antennas arranged in a second direction orthogonal to the first direction, a plurality of reception antennas include Na1 reception antennas arranged in the first direction and Na2 reception antennas arranged in the second direction. In the first direction, an inter-element space between any two of the Nt1 transmission antennas and an inter-element space between any two of the Na1 reception antennas are each a value which is a product of a first space and an integer and are all values different from each other, and in the second direction, an inter-element space between any two of the Nt2 transmission antennas and an inter-element space between any two of the Na2 reception antennas are each a value which is a product of a second space and an integer and are all values different from each other.