Abstract: A method can include receiving seismic survey data of a subsurface environment from a seismic survey utilizing water bed receivers, where each of the receivers includes a clock; assessing one or more clock calibration criteria; based on the assessing, selecting a clock drift processor for processing at least a portion of the seismic survey data from a plurality of different clock drift processors; using at least the clock drift processor, performing a simultaneous inversion for values of model-based parameters; and, using at least a portion of the values, generating processed seismic survey data that represents one or more geological interfaces in the subsurface environment.

Abstract: In general, in one aspect, embodiments relate to a method and/or system that includes disposing a cement bond logging tool into a wellbore. The method and/or system comprising: a cement bond logging tool comprising: two or more transmitters configured to transmit an acoustic wave from cement bond logging tool; and an array of receivers configured to receive a refracted waveform; and an information handling system configured to process the refracted waveform from the array of receivers into a cement bond property log.

Abstract: An acoustic element integrated circuit includes cells, being arrayed two-dimensionally on a same curved surface, wherein capacitive acoustic-elements having vibration membranes are allocated by unit number in each of the cells. Each of the cells encompasses an intra-cell circuit, which includes an exciting circuit for driving collectively portions by the unit number, the portions having transmitting functions of the acoustic-elements, and a reception circuit for processing collectively received signals transferred from portions by the unit number, the portions having reception functions in the acoustic-elements. Here, the exciting circuits are sorted into a chip in which high-voltage drivers for exciting the vibration membranes are merged and a chip in which circuits operated at voltages lower than the high-voltage drivers are merged, and the cells are operated two-dimensionally, by individually controlling the intra-cell circuits so that cells can be driven independently.

Abstract: A transducer device of a wearable object or as a wearable object as such, includes means for generating a first action in a first operating mode related to a specific function of the wearable object under the control of a processor or microcontroller processing unit of an electronic circuit being powered by a DC voltage source. The means for generating is configured to generate a second communication action in a second operating mode different from the first operating mode so as to obtain a dual-mode transducer device. The second operating mode allows information or data communication signals to be communicated mainly to the outside of the transducer device so that it can be detected by a monitoring unit of a monitoring system, is able to establish communication, and can receive data or parameter signals from another transducer device. The communication signals are ultrasonic signals transmitted into a water body.

Abstract: A system and method for creating ultrasound images of a moving medium is provided. The method includes receiving a first plurality of ultrasound wave signals obtained from the moving medium; generating an initial estimated model of a morphing function for the motion of the moving medium, wherein the motion of the moving medium is determined based on at least one received signal of the plurality of first received signals, wherein the morphing function defines morphing of the moving medium from a plurality of received signals; performing a wave inversion by using at least the estimated morphing function; and, generating an ultrasound image based on at least the model of the morphing function subsequent to the wave inversion. In an embodiment, a plurality of ultrasound emitters emit ultrasound wave signals that result in the first plurality of ultrasound wave signals.

Abstract: Methods and systems are disclosed for employing an ultrasonic sensor to estimate a range for a moving object. At least one processor separates returned signals received by an ultrasonic transducer into a stationary object signal and a moving object signal. A gain is determined based at least in part on the stationary object signal. The stationary object signal is combined with the moving object signal using the gain and then filtered. The range for the moving object is estimated using the filtered combined stationary and moving object signal.

Abstract: Provided is a method for judging geology of a time-delayed extremely intense rockburst as to deep tunnel engineering. Information about geological structures is recorded according to methods such as geological mapping and advanced geological prediction of the tunnel face. Geometric characteristics of burst craters formed during the rockburst are recorded by utilizing advanced geological drilling and profile scanning technologies in a rockburst-damaged zone. 3D geostress in the rockburst-damaged zone is measured by using a stress relief method or a hydraulic fracturing method to determine the orientation of the maximum principal stress. A 3D numerical calculation model is established based on initial geostress testing results and physical and mechanical parameters of rock and structural discontinuities obtained through on-site geological investigations.

Abstract: A system and method for designing a seismic survey including selecting a seismic survey grid as a basis for a seismic survey design and looping through the steps of generating off-the-grid locations by imposing spatial or temporal constraints on on-the-grid locations, mapping the off-the-grid locations from a physical domain to a pre-selected domain by applying a multidimensional transform to the off-the-grid locations, mapping the pre-selected domain to a rank-revealing domain using a pre-selected operator, applying a pre-selected process to minimize a rank of the off-the-grid locations in the pre-selected domain, and updating the seismic survey design based on which of the off-the-grid locations has the minimum rank until a pre-selected threshold is met indicating an optimal seismic survey design. The system and method include acquiring seismic data using the optimal seismic survey design, and enabling performing a wellsite action based at least on the seismic data.

Abstract: An ultrasonic probe lens comprising a lens body comprising a solid material extending outward from an optical lens axis to a periphery, an inner surface of the lens body, and an outer surface of the lens body. A thickness of the lens body as measured from the inner surface to the outer surface varies from an optical lens axis to the periphery such that the lens body is configured with an inner optical profile and an outer optical profile to phase modulate the ultrasonic waves incident upon the lens body to reduce reverberations.

Abstract: The present invention relates to a method and device for analysing a medium based on: —emitting plane or spiral emission waves (Oinc1) each having a respective emission angle, —receiving reception signals representative of plane or spiral reception waves (Orec1) each having a respective reception angle, each reception signal including a singly scattered component and a multiply scattered component, —processing the reception signals to extract the singly scattered component and/or the multiply scattered component of said reception signals.

Abstract: A flexible transducer designed with high volume manufacturing in mind is described, the where flexible transducer mount can be panelized into a grid form and the transducers assembled into the grid using commercially available pick-and-place tools. Once assembled, the mounted transducers may be attached to circuit boards using surface mount processes such as solder reflow or adhesive bonding via the electrical contacts on the underside of the flexible transducer mount. Further, maximization of the oscillating internal surface area that contributes to the acoustic pressure for a given transducer footprint area is described, which leads to greater packing density of transducers when used in an ultrasonic array. The greater packing density and pressure generated by the transducer aids with the miniaturization and cost reduction of mid-air haptic technology.

Abstract: An exemplary embodiment attempts to provide a full transmission device for wide-angle mode conversion of elastic waves which can realize mode conversion of elastic waves with high energy efficiency over a wide range of angle of incidence by a single filter. A full transmission device for wide-angle mode conversion of elastic waves includes an incidence medium where elastic waves including longitudinal waves and transverse waves enter obliquely within a preset wide angle range, a transmission medium that transmits elastic waves when the elastic waves enter the transmission medium within the wide angle range through the incidence medium, and a filter that is formed so as to satisfy a wide-angle mode conversion full-transmission condition when the filter is interposed between the incidence medium and the transmission medium, such that elastic waves entering the incidence medium within the wide angle range are completely converted without being reflected so as to be transmitted to the transmission medium.

Abstract: A method for determining the state of at least one sensor, the method using a first electromechanical transducer and a second electromechanical transducer that are coupled to a substrate, and a non-linear electrical circuit connected between the second electromechanical transducer and the sensor, the method comprising the steps of: applying an electrical signal at a first amplitude to the terminals of the first electromechanical transducer, and determining a first set of values of a parameter characteristic of the electrical impedance of the first electromechanical transducer in response to the application of the electrical signal; applying the electrical signal at a second amplitude to the terminals of the first electromechanical transducer, and determining a second set of values of the parameter characteristic of the impedance; measuring a difference between the first set of values and the second set of values; determining a state of the sensor on the basis of the difference between the first set of values

Abstract: A non-lethal animal shepherding active denial system of directed electromagnetic energy having at least one emitter to provide low-energy radiation to deter and shepherd birds and other species away from dangerous areas such as airports or wind turbines. The directed electromagnetic energy may be emitted in a conical shape to target a precise area and to define at least one denial zone and at least one shepherding zone. The shepherding zone may create a pathway to shepherd animals away from the denial zone to allow the birds to safely escape from the denial zone. Objects within a shepherding zone are subjected to dielectric heating, such that the radiation penetration is very shallow, only heating the surface of the skin or fur. By employing a large spatial swath, lower energies (<1 kW), and time-varying intensity, birds and other species can be shepherded away from regions of interest.

Abstract: A method of detecting an operating condition of a controllable flow regulator in a fluid flow channel of an HVAC system, comprising transmitting a sonic signal, from a sonic transmitter, directly or indirectly to the flow regulator, the sonic signal being distinguished from background noise by being at least one of: (i) modulated according to a modulation schema, (ii) an ultrasonic signal, (iii) a frequency selected to be away from background noise, receiving a signal from a sonic receiver for detecting the transmitted signal after interacting with the flow regulator; and determining, in an electronic signal processor, the operating condition of the flow regulator on the basis of the signal received.

Abstract: Underwater communication using sensing fusion can include one or more electronic devices. The electronic device can include a housing defining an internal volume. The electronic device can include a speaker sealed to the housing and tuned for water use (e.g., to produce/detect audible and/or sonar frequency noise underwater). The speaker can include a diaphragm configured to resonate at one or more frequencies underwater. The electronic device can include a pressure compensator associated with the speaker to compensate for hydrostatic pressure acting on the diaphragm. The speaker can include a water permeable membrane to equalize pressure underwater within the speaker, while still maintaining a seal with the housing. The speaker can include multiple seals to prevent water ingress to the internal volume. The electronic device can include another speaker for land communication (e.g., to produce/detect audible noise on land).

Abstract: A method of quantifying a plurality of parameters of a subsurface structure comprising a region of interest, the method comprising the steps of: with at least one vibratory source, emitting an input wave signal into the subsurface structure to cause generation of seismic wave signals in the subsurface structure; with at least one receiver, acquiring and measuring the seismic wave signals from the subsurface structure, wherein the seismic wave signals comprise at least one first Rayleigh wave (R1) signal and at least one second Rayleigh wave (R2) signal associated with the region of interest; generating, at a data processing apparatus, seismic data associated with measurements of the seismic wave signals; determining, at the data processing apparatus, from the seismic data a relationship between the Rayleigh wave (R1, R2) signals, wherein the Rayleigh wave (R1, R2) signals are dependent on at least one of the plurality of parameters.

Abstract: A resonator and/or transducer comprising at least one deflectable membrane, a fixed substrate, and at least one cavity defined between the at least one deflectable membrane and the fixed substrate. A Free to Fixed Boundary Ratio (FFBR) of the deflectable membrane is selected to optimize a characteristic of the resonator and/or transducer, such as resonant frequency, displacement, operating voltage, electromechanical coupling coefficient, or mass sensitivity.

Abstract: Examples of the disclosure relate to apparatus (101) for positioning mobile devices (105). The apparatus (101) comprises means for: obtaining a time of arrival of at least one audio signal (131) at a mobile device (105), wherein the audio signal (131) is generated with a photoacoustic effect; and using the time of the arrival of the audio signal (131) to estimate a location of the mobile device (105).

Abstract: The present invention relates to an electronic device and corresponding method, where the electronic device includes at least two sensors. The at least two sensors are in communication with a virtual sensor including a processing unit adapted to monitor the use of the device based on input from said sensors. The at least two sensors include activity sensors sensing user activities related to the device, and the processing unit is configured to receive and analyze the input from said sensors during use and to provide and store a model representing said typical use of the device. The device further being configured to compare new measurements received from said sensors with said model, providing a signal if the new measurements from said sensors deviates by a predetermined limit from the measurements predicted by the model.