775 results about "Acoustic energy" patented technology

An incubator can include a body, a bed supported by the body, and a canopy defining an interior chamber that includes the bed. The incubator can include any combination of various features configured to reduce sound energy inside the incubator. The incubator can include a passive radiator, a Helmholtz resonator, a meta material absorber, an active noise cancelation system, a vented door latch assembly, an acoustically permeable seal, a pressure relief valve, a lift mechanism that uses a belt drive, double paned canopy walls, a bin with insulating compliant elements, a manual pressure release valve, a pressure differential notification system, non-parallel or curved canopy walls, a mattress with reticulated foam, and / or an acoustic filter.

A method for specifying desired quantities of the energy flux of the combined waves of acoustic radiation pressure to apply producing a mid-air haptic pushing force, which has the effect of simultaneously reducing the harmonic distortion present is described. Further, a method for communicating only the summaries of acoustic field contributions at the required locations in the form of summed portions of the relatively small matrix whose row and column count depend only on the control point count is described. Further, phased arrays of ultrasonic speakers can produce a relatively large amount of acoustic energy which is usually directed in a specific direction or focused to a particular point depending on the application of the array. Further, to allow the system to be driven more strongly than usual, the complex-valued linear system that governs the drive signal to each control point is solved twice. Further, to achieve mid-air haptics with high precision the radiation pressure generated must be modelled accurately.

A catheter system for treating stenosis in a body lumen includes a first energy source, a second energy source, and a catheter. The catheter includes an elongate member that is navigable through the body lumen, a first acoustic energy emitter connected to the first energy source and configured to emit acoustic energy when energy is received from the first energy source, and a second acoustic energy emitter connected to the second energy source and configured to emit acoustic energy when energy is received from the second energy source.

The invention discloses a fan blade diagnosis method and system based on voiceprint perception, and relates to the technical field of intelligent monitoring of wind power equipment, and the method comprises the steps: carrying out frequency domain compensation processing, stripping environment wind noise components, and generating a pure voiceprint signal based on a wind flow characteristic parameter set; based on the pure voiceprint signal, identifying a sensitive acoustic frequency band of the fan blade, exciting a sound wave phase synergistic effect in the sensitive acoustic frequency band, and generating an enhanced voiceprint signal; quantifying the internal damage depth of the fan blade material according to the enhanced voiceprint signal, and calculating a sound energy flow disorder degree index; according to the sound energy flow disorder degree index, the blade health state of the fan is judged through a multi-dimensional acoustic characteristic state space mapping mechanism, and a three-dimensional health assessment report is generated; through a physical level wind noise stripping technology, a transfer function matrix is generated based on vortex interference modeling and sound wave-airflow phase offset correction, frequency domain energy reweighted decoupling is realized, and environmental wind noise is accurately stripped in a strong turbulence environment.

The invention relates to the technical field of power systems, in particular to a transformer substation low-frequency noise source positioning method. The method comprises the following steps: obtaining a three-dimensional environment model of each structure in a transformer substation, and obtaining a geometric body topological relation matrix in the three-dimensional environment model; performing field measurement on the transformer substation to obtain noise measurement data; and performing outer convolution fusion on noise images between adjacent units according to the geometric topological relation matrix and the local noise image data, and iteratively spreading the noise images to the whole transformer substation area to generate initial sound source distribution estimation data of the whole transformer substation. The sound energy flow is utilized to analyze and identify the source position, the static source and the moving source are separated and tracked in combination with direction estimation and trajectory reconstruction, the static source can be accurately positioned, meanwhile, the motion trajectory of the moving source is obtained, and the separation efficiency is improved.

A catheter system (100) for treating a treatment site (106) within or adjacent to a vessel wall (108A) of a blood vessel (108), or within or adjacent to a heart valve, includes an energy source (124) and a system controller (126). The energy source (124) generates a plurality of energy pulses. The system controller (126) includes a processor that controls the energy source (124). The system controller (126) is configured to implement an energy control algorithm to control both of (i) a pulse frequency of the plurality of energy pulses, and (ii) an energy level for each of the plurality of energy pulses that are generated by the energy source (124). As the pulse frequency of the plurality of energy pulses increases, the energy level for each of the plurality of energy pulses decreases.

The invention discloses a visual detection system and method for a TBM wall back grouting effect, and belongs to the technical field of tunnel detection, and the system comprises an acoustic signal transmitting matrix, an acoustic energy sensing matrix, a tunnel half-section synchronous lifting device, a data processing center, a core scheduling unit, a holographic data processing unit and a holographic intelligent analysis unit, the tunnel half-section synchronous lifting device comprises a tunnel half-section synchronous lifting track, a transmitting base, a sensing base, a transmitting sensing partition plate and a transmitting sensing fixing plate. According to the method, grouting attribute information of a to-be-detected area is obtained through a root-mean-square value, a longitudinal wave energy dissipation value, longitudinal wave sending and receiving time difference and a wave velocity value, a three-dimensional information model of a tunnel section is built through a holographic data processing unit based on the information, and difference data and a difference area are presented through a holographic intelligent analysis unit; therefore, visualization processing of the tunnel grouting information is achieved, and the accuracy of TBM wall back grouting effect detection is improved.

The invention belongs to the technical field of acoustic devices and ultrasound, and discloses an ultrasonic transducer, a multi-layer gradient acoustic impedance matching layer and a preparation method of the multi-layer gradient acoustic impedance matching layer, and the multi-layer gradient acoustic impedance matching layer comprises a plurality of acoustic impedance layers which are arranged in sequence and have different acoustic impedances; in the direction from the first acoustic impedance layer to the last acoustic impedance layer, the acoustic impedance of the acoustic impedance layer is in a decreasing trend; the surface of the previous acoustic impedance layer is provided with a micro-columnar structure, the micro-columnar structure extends into the next acoustic impedance layer, a mechanical interlocking interface is formed between the previous acoustic impedance layer and the next acoustic impedance layer through the micro-columnar structure, and the micro-columnar structure is gradually thinned from the bottom to the tip. According to the invention, the gradient impedance design of the acoustic impedance layers significantly reduces the acoustic reflection between the acoustic impedance layers, improves the acoustic energy transmission efficiency, and widens the working bandwidth of the ultrasonic device; the micro-columnar structure not only maintains the stability of interlayer adhesion in a high vibration or thermal stress environment, but also further smooths gradient transition and reduces interface reflection.

Mixed sensor array devices are provided herein. Mixed sensor arrays as described herein include acoustic energy generating elements and optical fiber based acoustic sensors. Optical fiber based sensors may optical structures responsive to physical parameters including acoustic signals, pressure, and temperature, and are configured to detect and receive acoustic signals and other physical parameters and provide associated optical signals to a system for processing and interpretation to implement tracking, location, imaging, and other sensing capabilities. Optical fiber based sensors provided herein may be disposed at ends of or along the length of optic fibers. Optical fiber based sensors may be included within various devices, including, for example, medical devices.

The invention discloses a digital twinning and AI analysis sewage treatment control system, and relates to the technical field of sewage equipment control, and the system comprises the steps: deploying a sensor to obtain a sewage treatment acoustic signal to form an acoustic energy matrix, and synchronously obtaining the operation data of a treatment plant to construct an operation data matrix; fusing the acoustic energy matrix and the operation data matrix to form a high-dimensional data matrix; mapping the high-dimensional data matrix into a low-dimensional point cloud, constructing a point cloud adjacent matrix, recognizing topological features according to the adjacent matrix, analyzing abnormal topological features by combining persistent coherence with topological entropy, and calculating an abnormal confidence coefficient; and establishing a hierarchical agent based on the abnormal confidence coefficient, defining a reward function through life cycle evaluation, adjusting a hierarchical agent optimization strategy by adopting DDPG reinforcement learning, predicting the performance of the optimization strategy in combination with a multi-step prediction loss function, and outputting the optimization strategy. According to the invention, the control strategy of the sewage treatment equipment is continuously optimized, and the strategy implementation efficiency is improved.

Mixed sensor array devices are provided herein. Mixed sensor arrays as described herein include acoustic energy generating elements and optical fiber based acoustic sensors. Optical fiber based sensors may optical structures responsive to physical parameters including acoustic signals, pressure, and temperature, and are configured to detect and receive acoustic signals and other physical parameters and provide associated optical signals to a system for processing and interpretation to implement tracking, location, imaging, and other sensing capabilities. Optical fiber based sensors provided herein may be disposed at ends of or along the length of optic fibers. Optical fiber based sensors may be included within various devices, including, for example, medical devices.

The invention relates to the technical field of intelligent household appliances and man-machine interaction, and discloses an electric cooker anti-noise voice interaction system based on multi-mode perception and a control method, and the system comprises a multi-mode perception and collection unit which synchronously collects millimeter wave radar echo signals and acoustic signals; the signal preprocessing and feature extraction unit is used for extracting a user physiological vibration signal and a three-dimensional space position vector from the radar signal and extracting an acoustic energy envelope and a sound source direction vector from the acoustic signal; the time-space consistency verification unit and the voice gating and recognition unit are used for carrying out time synchronization verification by calculating the correlation between the physiological vibration signal and the acoustic energy envelope, and distinguishing real human voice from an environment false trigger source; meanwhile, space consistency verification is carried out by comparing the user direction of radar positioning with the sound source direction of acoustic positioning, so that non-target human voice interference is eliminated. According to the invention, the anti-interference capability and reliability of voice interaction in a real home environment are improved through double verification on a physical level.

The acoustic black hole vibration and noise reduction structure comprises a main body, and an acoustic black hole cavity is formed in the main body; in the axis direction of the cavity, the acoustic black hole cavity comprises a first cavity section, a second cavity section and a third cavity section, and the first cavity section and the third cavity section are both cylindrical; the diameter of the second cavity section is reduced in a power function mode from the end, connected with the first cavity section, of the second cavity section to the end, connected with the third cavity section, of the second cavity section. When the body receives external wave excitation, an acoustic black hole cavity within the body may capture waves, absorb vibrations and acoustic energy into the acoustic black hole cavity. The damping sound absorption block arranged in the acoustic black hole structure dissipates captured vibration and sound wave energy, the damping sound absorption coating on the outer surface of the main body absorbs the remaining part of vibration and sound energy, and efficient vibration and noise reduction at the connecting part can be achieved.

The invention discloses a reconfigurable acoustical holography modulation method and device based on a crystalline polymer. The programmable acoustical holography device is composed of a single-layer photoresponse crystalline polymerization flat plate, is switched between two phases when the temperature irradiated by laser changes, has a crystalline state and a non-crystalline state, and reversibly changes along with the temperature. Space sound field modulation can be realized by spatially arranging the coding units, the crystalline polymer flat plate subjected to laser patterning phase change is recovered to the previous crystalline state after being cooled, the patterned coding acoustical holography disappears, and new phase acoustical holography is written in, so that a new sound field modulation function is realized. According to the programmable phase acoustical holography device based on the crystalline polymer, the incident plane wave of the probe can be modulated into any three-dimensional complex sound field, and the programmable phase acoustical holography device is of a complete plane type, is matched with underwater acoustic impedance, and is high in acoustic energy coupling efficiency, compact in structure, easy to prepare and low in price.

The invention discloses a heat exchanger and method for rare gas preparation, and relates to the technical field of heat exchangers, the heat exchanger comprises a heat exchange mechanism, the outer surface wall of the heat exchange mechanism is sleeved with a cleaning structure, the input end of the heat exchange mechanism communicates with a feeding mechanism, and an aeration mechanism is inserted into the inner surface wall of the heat exchange mechanism. In the cleaning process, the second air pump conveys outside air to the aeration ball, so that a large number of bubbles are formed in cleaning liquid, dirt is cleaned by means of tiny shock waves and high-speed micro jet flow generated during bubble movement and breakage, and the ultrasonic generator can release sound wave energy; the synergistic effect of bubbles and sound waves greatly improves the cleaning efficiency and effect, enhances the stripping capacity of dirt on the inner wall of the heat exchanger, ensures that rare gas is not polluted in the heat exchange process, maintains the high purity of the rare gas, keeps the inner wall of the heat exchanger smooth, and improves the heat transfer efficiency, so that the cooling or heating speed of the rare gas is increased, and the service life of the heat exchanger is prolonged. The efficiency of the whole preparation process is improved.

Downhole tools for measuring properties of a fluid include a sample chamber configured to receive the fluid, a field responsive material (“FRM”) arranged with an interface between the field responsive material and the fluid under test in the sample chamber. The field responsive material is tunable to change an acoustic impedance of the field responsive material in response to application of an applied field. A field generator is arranged in relation to the field responsive material, the field generator configured to generate and apply a field to the field responsive material. An acoustic transducer is arranged to direct acoustic energy into and through the field responsive material toward the interface between the field responsive material and the fluid and configured to detect reflections of acoustic energy that reflect from the interface.

A portable acoustical blocking system is disclosed for use with a support comprising a sheet of acoustical blocking material bound by material edge. A reinforcing tape is affixed to the sheet of acoustical blocking material adjacent to the material edge. A decorative component comprising a flexible substrate with a decorative image is located adjacent to the acoustical blocking material. A plurality of hangers are secured to the sheet of acoustical blocking material and extending through the reinforcing tape and the sheet of acoustical blocking material for hanging the sheet of acoustical blocking material and the decorative component from the support for inhibiting the flow of acoustic energy between the first and second sides of the acoustical blocking material.

The invention discloses a wave velocity testing module, and a device and a method for simultaneously testing the wave velocity and CPTU of a soil body. The wave velocity testing module comprises a wave velocity testing module shell, a wave velocity measuring module and a wave velocity measuring module, the energy converter is used for converting the electric energy into sound energy and converting the sound energy into an electric signal at the same time; the adhesive layer is arranged in the space of the wave velocity testing module shell between the transducer and the reflecting plate; and the reflecting plate is arranged in the wave velocity testing module shell, is obliquely arranged above the energy converter, and is used for changing the sound wave emitted by the energy converter to be propagated in the direction perpendicular to the outer wall of the wave velocity testing module shell, receiving the reflected sound wave reflected by the soil body, changing the direction of the reflected sound wave and then transmitting the reflected sound wave to the energy converter. According to the device, CPTU testing and wave velocity testing can be completed at the same time in the one-time penetration process, multiple soil mass mechanical properties and acoustic parameters can be tested through one-time penetration of one set of equipment, the testing work efficiency is improved, and the testing result precision is more accurate.

A method for fixing a biological sample includes delivering energy through a biological sample that has been removed from a subject, while fixing the biological sample. A change in speed of the energy traveling through the biological sample is evaluated to monitor the progress of the fixation. A system for performing the method can include a transmitter that outputs the energy and a receiver configured to detect the transmitted energy. A computing device can evaluate the speed of the energy based on signals from the receiver.

A method is described for method of processing seismic data including obtaining seismic data, wherein the seismic data was acquired with a plurality of azimuthal receiver elements of a logging-while-drilling tool while a drill bit is drilling a wellbore; decomposing the seismic data into monopole and dipole modes; cross-correlating each receiver pair of the monopole mode and of the dipole mode to generate monopole and dipole waveforms; identifying a time of direct arrival of acoustic energy from the drill bit and applying bulk time shift for the waveforms; stacking corresponding waveforms from the bulk time shift to improve signal-to-noise ratio; processing the stacked monopole and dipole waveform to isolate reflected arrivals; performing migration to obtain a monopole migrated image and a dipole migrated image; and classifying the interface as either a fracture or an impedance contrast. The method is executed by a computer system.

The invention discloses a production optimization method and system for animal blood-made protein powder, particularly relates to the technical field of production monitoring, and aims to solve the problem that the existing method is difficult to effectively identify the potential hidden danger of the cavitation effect caused by ultrasonic waves in the production process of the animal blood-made protein powder. The method comprises the following steps: capturing harmonic characteristics of ultrasonic signals, and identifying an acoustic energy dense region in combination with a spectrum analysis algorithm; constructing a turbulence disturbance intensity graph model, and analyzing the distribution characteristic change of the dissolved gas in combination with a graph embedding learning algorithm; determining a cavitation potential risk area based on the identified first and second potential risk areas; in the cavitation potential risk area, the comprehensive influence of the bubble group synergistic effect and the heat effect is evaluated by analyzing the complexity of bubble interaction energy distribution and the diffusion degree of local high temperature; and finally, determining a cavitation hidden danger caused by ultrasonic waves by calculating a cavitation influence coefficient, and optimizing production process parameters according to a determination result.

The invention relates to the technical field of gas ultrasonic flow meters, in particular to a flow integrating system based on a gas ultrasonic flow meter. The system comprises a data acquisition unit which acquires and stores data based on an acquisition and storage module; the ultrasonic transduction unit converts sound energy into an ultrasonic signal through an ultrasonic transducer based on the data acquired by the data acquisition unit; the flow measuring unit is used for driving a transducer, amplifying the ultrasonic signal and carrying out filtering and operation processing on the basis of the ultrasonic signal converted by the ultrasonic transduction unit; the flow integrating unit collects instantaneous flow, temperature and pressure data according to the operation processing result of the flow measuring unit, calculates the optimal compression factor, calculates the working condition accumulated flow, the standard condition instantaneous flow and the standard condition accumulated flow, and displays the values through a liquid crystal display screen. Through signal amplification, filtering and automatic gain control, noise and interference are effectively removed, and the signal quality and the signal-to-noise ratio are improved.

The invention discloses a signal enhancement system and method based on passive high-frequency opto-acoustic / ultrasonic microscopic imaging. The system comprises a laser excitation module, an ultrasonic excitation detection module and a signal processing control module. According to the invention, the required target laser is excited through the laser excitation module, so that a good light source condition is provided for microscopic imaging; the method comprises the following steps: under ultrasonic microscopic imaging, exciting high-frequency ultrasonic waves through an opto-acoustic transducer, and gathering and enhancing the ultrasonic waves in an acoustic wave transmission space of the opto-acoustic transducer and a sample to be detected by utilizing an energy gathering device; under photoacoustic microscopic imaging, ultrasonic waves are excited on a detected sample by means of laser, and the laser and sound waves are reflected, focused and enhanced by an energy concentrator, so that the sensitivity and the signal-to-noise ratio of microscopic imaging are improved, and the detection efficiency of microscopic imaging is improved; and the signal processing control module controls the three-dimensional mobile platform to scan the tested sample through the controller to realize the integrity of ultrasonic signal acquisition of the tested sample, so that an ultrasonic image of the tested sample is generated.

The invention provides an intelligent monitoring method and system for the sealing performance of a liquid-driven compressor, and the method comprises the steps: collecting the high-frequency pressure data and circulating liquid flow data of a sealing cavity of the liquid-driven compressor, and a friction sound signal of a sealing interface; based on the high-frequency pressure data and the circulating liquid flow data, constructing a pressure flow covariant relationship; performing directional enhancement processing on the friction sound signal to form sound energy intensity distribution information; adopting a DIANA algorithm to carry out adaptive clustering processing on the sound energy intensity distribution information to generate a sealing abnormity index; and the pressure flow covariant relation and the sealing abnormity index are analyzed in a combined mode, a monitoring result representing the sealing performance of the hydraulic drive compressor is generated, and when the monitoring result exceeds a preset warning value, a sealing failure monitoring alarm is triggered. According to the invention, the timeliness and reliability of sealing performance monitoring are improved.

The invention relates to the technical field of biology, and particularly discloses a device and a method for separating an adherent cell through a vortex sound field, an ultrasonic module, piezoelectric ceramics and an Archimedes spiral structure concave lens are arranged to generate the vortex sound field to act on a cell culture dish, so that an adjustable shear flow is generated on the cell culture dish, and the adherent cell is separated from the cell culture dish. And locally separating the adherent cells in the cell culture dish. According to the concave lens with the Archimedes spiral structure, the problem of defocusing of a high-order vortex sound field can be solved, and the falling control accuracy of adherent cells is improved. The proposed method does not require any physical contact with adherent cells, and does not require insertion of an instrument into a cell culture dish, thereby reducing the risk of contamination and cell damage. The stable flow generated by absorbing sound energy by the liquid is used for indirectly separating the adherent cells, the method is extremely low in energy density and has good biocompatibility, and the activity of the cells is ensured while the cells are efficiently separated.

The present disclosure provides a method of processing data obtained from distributed optical fiber sensors to detect acoustic energy generated by a poroelastic effect of fractures in a structure, such as a rock formation. The sensing fiber of an optical fiber distributed sensing system may be deployed in the vicinity of the region where fracturing is occurring, for example, along a well that is offset from a treatment well undergoing hydraulic fracturing. The DAS data obtained from along the sensing fiber is processed to measure changes in the low-frequency strain caused by the poroelastic effects in the rock as the fractures open and close. This measured strain rate data is iteratively processed at each instant time to identify fracture opening features (characterised as compression-tension-compression) that are correlated with fracture closing features (characterised as tension-compression-tension) as a function of depth, to thereby identify and locate fracture hits in the vicinity of the sensing fiber.

The invention relates to an acoustic covering system for covering at least parts of a boundary (B) of a room, the acoustic covering system being configured to provide variable sound absorption, where the acoustic covering system comprises: a solid structure (2) configured to be attached to the boundary (B), such that the solid structure (2) and the boundary (B) form a space (S); and one or more boards (6) attached to the solid structure (2) and configured to selectively move relative to the solid structure (2), such that, in an open state of the acoustic covering system, one or more respective openings (45) are created between the one or more boards (6) and the solid structure (2) on at least part of a circumference of the respective one or more boards (6) to enable sound energy to pass through and reach sound absorbing means (12) within the space (S) between the one or more boards (6) and the boundary (B), wherein the sound energy is absorbed in the open state of the acoustic covering system to lower the reverberation time, RT, in the room when the acoustic covering system is installed.

A system and method for determining fluid quality or change in quality by training machine learning algorithms using ultrasound Fast Fourier Transform (FFT) signatures. The system includes one or more ultrasonic transducers embedded inside or outside of a pipe, piping, or vessel that allows a fluid to flow past or between the ultrasound transducers. The transducer's acoustic energy creates ultrasound pressure waves and localized heat due to acoustic cavitation. The cavitation creates bubbles that collapse creating ultrasound sonic energy in the time domain. Unique sonic time-domain signatures, distinctively associated with the characteristics of the fluids, are converted to FFTs to produce unique, well-defined frequency response signatures. Machine learning algorithms are used to identify, measure, and classify the unique frequency response signatures associated with a wide range of fluids.

A loudspeaker includes a housing having a plurality of walls that together define an acoustic cavity. An electro-acoustic transducer is mounted to a front wall of the housing, and an axis of motion of the electro-acoustic transducer is offset from a centroid of the front wall. The loudspeaker is configured to be stacked with another loudspeaker having the same configuration in a first configuration such that the stacked loudspeakers radiate acoustic energy to produce an omnidirectional radiation pattern; and the loudspeaker is configured to be stacked with the other loudspeaker in a second configuration such that the stacked loudspeakers radiate acoustic energy to produce a cardioid radiation pattern. The loudspeaker includes a keying feature that does not interlock and thereby prevent stacking when the loudspeaker is in a first orientation relative to the other loudspeaker, and that interlocks to allow stacking when the loudspeaker is in a second orientation relative to the other loudspeaker.

A headphone includes an earphone that includes an earcup, an ear cushion, and a driver plate assembly. The driver plate assembly is supported in the earcup and includes a driver plate, a driver mounted along a rear surface of the driver plate, an opening that is provided in the driver plate to allow acoustic energy to pass from the driver into a user's ear canal, a ring that is arranged substantially coaxially with the opening, and an acoustic mesh. The ring defines a planar surface on which the acoustic mesh is mounted.