476 results about "Ultrasound" patented technology

MRI interference with a co-existing ultrasound system may be reduced or avoided by carrying out RF-sensitive operations of the treatment system only when gradient field activity of the MRI system is suppressed.

The invention discloses a bearing defect detection method and system based on machine vision and ultrasonic detection, and particularly relates to the technical field of industrial automatic detection, and the method comprises the steps: S1, a synchronous collection module: carrying out pulse triggering synchronous collection, and generating a time-space reference table; s2, a feature extraction module: performing image noise reduction segmentation and ultrasonic frequency domain decomposition, and outputting a defect feature vector; s3, a fusion identification module: performing cross-modal feature alignment fusion to generate a defect classification conclusion; s4, a size measurement module: performing contour fitting to calculate inner and outer diameters, and outputting a size deviation value; and S5, a comprehensive judgment module: carrying out threshold comparison logic judgment, and generating a multi-modal detection report. According to the method, a space-time reference is established through an encoder, images are segmented in a self-adaptive mode, features are extracted through wavelet decomposition ultrasound, feature weights are re-calibrated through a parallel network and an attention mechanism, composite defects are recognized through cross-modal fusion, comprehensive judgment is conducted in combination with dimensional deviation, and a multi-dimensional quality evaluation system is achieved.

The invention relates to the technical field of intelligent health, and discloses an intelligent health middle-aged and elderly people behavior data real-time monitoring and analysis method and system, and the method comprises the steps: collecting a biological resonance signal, a gas spectrum and a sound wave signal of middle-aged and elderly people; constructing a resonance characteristic spectrum of the middle-aged and elderly people, and analyzing physiological feedback characteristics of the middle-aged and elderly people by using the resonance characteristic spectrum; constructing an odor-behavior association map of the middle-aged and elderly people, and identifying gas feedback characteristics of the middle-aged and elderly people by using the odor-behavior association map; performing frequency domain decomposition on the sound wave signal to obtain an infrasonic frequency band and an ultrasonic frequency band, identifying internal organ vibration characteristics and body surface action characteristics of the middle-aged and elderly people, and analyzing voiceprint feedback characteristics of the middle-aged and elderly people; the physiological feedback features, the gas feedback features and the voiceprint feedback features are used for conducting behavior analysis on the middle-aged and elderly people, and a behavior monitoring report is obtained. The method can improve the reliability of behavior abnormality analysis of the elderly in smart health.

A row-column ultrasound transducer array is controlled to perform excitation in the azimuth dimension with two sets of excitation signals in quadrature. The two sets of excitation signals are delivered such that adjacent transducer elements are simultaneously provided excitation signals in quadrature, or such that transmit events occur temporally in series for synthetic imaging, with each transmit event being generated using a respective set of excitation signals. Separate bias apertures are applied in the bias (elevation) direction for each set of excitation signals, such that elements driven according to one set of excitation signals are biased, in the elevation direction, according to one bias aperture, and the elements driven with quadrature excitation signals are biased according to another bias aperture. The bias apertures are selected such that their combination results in the generation of a Fresnel aperture with fine and controllable phase resolution beyond that of a conventional row-column transducer.

An audio device comprising, an interface, one or more first output transducers, one or more input transducers, and a processor. The audio device is configured to emit a first ultrasound signal, receive a first reflection indicative of the first ultrasound signal, process the first reflection to determine movement, and in response to movement being determined, adjust one or more audio processing parameters of the audio device.

Techniques and apparatuses are described for performing internal-noise-source filtering for active acoustic sensing. With internal-noise-source filtering (202), interference caused by a hearable (102) performing other operations (e.g., rendering audio content (204), performing active noise cancellation (206), or operating in accordance with a transparency mode (214)) can be attenuated within a received ultrasound signal to improve sensitivity and accuracy for audioplethysmography. This performance improvement enables audioplethysmography to be performed while the hearable (102) performs these other operations. Furthermore, it improves the ability of audioplethysmography to be used for voice processing, which can include voice activity detection, speech recognition, and / or conversation detection.

Techniques and devices for performing internal noise source filtering for active acoustic sensing are described. With internal noise source filtering (202), interference caused by the hearing-worn device (102) performing other operations (e.g., rendering audio content (204), performing active noise cancellation (206), or operating according to a pass-through mode (214)) may be attenuated within the received ultrasound signal to improve the sensitivity and accuracy of audio volumetric tracing. This performance improvement enables audio plethysmography to be performed when the audible wearable device (102) performs these other operations. Further, it improves the ability of audio plethysmography for speech processing, which may include speech activity detection, speech recognition, and / or dialog detection.

A method is described for generating high-resolution images of transversely isotropic mechanical properties and attenuation properties of tissues associated with measured compressional waves. A pressure wave is transmitted to a region containing fibers that are oriented with transverse isotropy. Waves are received that propagate after the pressure wave has impinged upon the fibers. An initial velocity and attenuation model is created that takes into account the transverse isotropy of the fibers. Full Waveform Inversion (FWI) is used to iteratively minimize a difference between the received data and the initial velocity and attenuation model to create an image of the region that takes into account the transverse isotropy of the fibers. The image has a higher resolution than if created using the initial velocity and attenuation model.

The utility model relates to the field of medical instruments, in particular to an auxiliary sleep device with a sound wave hypnosis function, which comprises a base, a support block, a seat, a backrest, a headrest, an electric push rod and the like, the upper side of the middle of the base is connected with the support block, the upper side of the support block is connected with the seat, the left part of the seat is rotatably connected with the backrest, and the upper side of the backrest is connected with the headrest. The left part of the backrest is rotationally connected with an electric push rod. The window shade is put down by pushing the connecting frame to move and then reversely pulling the pull bead chain, and then sound waves are sent out by the ultrasonic sleep aiding device for hypnosis to assist sleep, so that the sound waves can be used for hypnosis of a user to assist sleep, relax the brain and accelerate falling asleep, and meanwhile, the window shade can be used for shading. A user is in a dark environment, light stimulation is avoided, the sleep quality is improved, and use is convenient.

The subject of the invention is a method of electroacoustic heart-lung dynamics that includes the steps of: A) recording a three-dimensional ECG; B) recording three-dimensional impedance rheometry of the chest; C) recording of chest sounds resulting from internal organs in the frequency range up to 20 kHz; D) recording ultrasound from the chest resulting from the movement of internal organs in the frequency range above 20 kHz; E) determination of characteristic events in the data from steps A), B), C), and D) associated with a given organ in particular detection of the breathing phase, breathing rhythm, and breathing rate, and in particular detection of the heart contraction phase using the data from steps A) and B), and detection of sounds from the lungs; F) determining the temporal and / or phase correlation of events in the data from steps A), B), C) and D); G) comparing the temporal and / or phase correlation of events from steps A), B), C), and D) with the benchmark data; H) determination of the relationship between the determined temporal and / or phase correlation of events and the benchmark temporal and / or phase correlation of events. The object of the invention is also a device for implementing this method. (15 claims)

The utility model discloses an ultrasonic microreactor which is formed by directly attaching an ultrasonic transducer and a microreactor, the ultrasonic microreactor is formed by connecting a plurality of fluid microchannel reaction layers in series; the fluid micro-channel reaction layer is formed by alternately connecting a plurality of thin channels and thick channels; a reaction layer turbulent flow chip is arranged in the middle of the thick channel; under the synergistic effect of ultrasound and the microreactor, the ultrasonic microreactor has higher energy density and more accurate sound field and flow field regulation and control capability, and can solve the problems that channels are easy to block and the like, so that nano-emulsion with uniform particle size can be continuously prepared, and the efficiency of an emulsification process and the quality of an emulsion product are improved.

The invention provides a shared excitation source ultrasonic and infrared thermal imaging integrated detection method and system, and the method comprises the steps: applying a shared excitation source to a to-be-detected object, synchronously collecting a multi-channel ultrasonic echo signal and an infrared thermal imaging image, dividing the to-be-detected object into a plurality of target regions, and calculating the frequency band ultrasonic attenuation coefficient and acoustic impedance of each region, further obtaining a densification value; after a heat flow response feature map is extracted from an infrared image, adaptive partitioning is carried out on multi-modal data according to the spatial gradient of a densified value and a heat flow response energy accumulation area, and a plurality of data analysis subsets are formed. For each subset, constructing a local joint dictionary according to the densification value and the heat flow feature of the subset; and performing joint sparse representation on the ultrasonic and infrared features in the subsets by using the dictionary to obtain a group of cross-modal fusion coefficients, accurately determining defect information in the object to be detected based on the fusion coefficients and a defect identification model, and generating a defect distribution diagram.

Systems and methods for implementing operation-specific impedance matching for enhancing sensitivity of an ultrasound system are described. To enhance sensitivity while using a transducer element for transmission and reception, a transducer module's architecture provides operation-specific impedance matching. Operation-specific impedance matching means that different impedances are provided for mitigating mismatch loss during transmission and reception. The impedance provided for reception can be associated with separate signal path with a smaller amount of attenuation compared to the impedance provided for transmission. In this way, the architecture enhances sensitivity of the ultrasound system by reducing an amount of attenuation experienced during reception compared to other ultrasound systems that utilize a same impedance for impedance matching during transmission and reception. With enhanced sensitivity, the ultrasound system can utilize higher frequencies and / or broader bandwidths to provide high-resolution images at farther imaging depths while meeting power-intensity guidelines.

The invention relates to the technical field of pressure vessel health monitoring and nondestructive testing, in particular to an electromagnetic acoustic surface wave-based pressure vessel intergranular corrosion non-contact detection system, which comprises the following modules: a multi-field coupling electromagnetic acoustic surface wave detection module, which comprises a plurality of detection unit arrays, each detection unit comprises a magnetic biasing module and an impedance matching module and is used for generating a local magnetic field on the surface of the pressure vessel and optimizing signal excitation and receiving; and the signal acquisition and preprocessing module is used for acquiring the surface wave signal of the detection module and carrying out denoising, filtering, curved surface coupling difference correction and lift-off correction on the signal to obtain high-quality signal data. According to the method, non-contact quantitative detection of the intergranular corrosion of the pressure vessel is realized through multi-field coupling electromagnetic acoustic surface wave detection and microscopic and macroscopic mapping and inversion, so that the problem that early corrosion is difficult to quantify due to the fact that contact ultrasound is mostly adopted in traditional pressure vessel detection and grain boundary micro-damage cannot be effectively identified is solved.

Systems and methods for implementing operation-specific impedance matching for enhancing sensitivity of an ultrasound system are described. To enhance sensitivity while using a transducer element for transmission and reception, a transducer module's architecture provides operation-specific impedance matching. Operation-specific impedance matching means that different impedances are provided for mitigating mismatch loss during transmission and reception. The impedance provided for reception can be associated with separate signal path with a smaller amount of attenuation compared to the impedance provided for transmission. In this way, the architecture enhances sensitivity of the ultrasound system by reducing an amount of attenuation experienced during reception compared to other ultrasound systems that utilize a same impedance for impedance matching during transmission and reception. With enhanced sensitivity, the ultrasound system can utilize higher frequencies and / or broader bandwidths to provide high-resolution images at farther imaging depths while meeting power-intensity guidelines.

A system may include a probe configured to transmit ultrasound signals to a target of interest, and receive echo information associated with the transmitted ultrasound signals. The system may also include at least one processing device configured to process the received echo information using a machine learning algorithm to generate probability information associated with the target of interest. The at least one processing device may further classify the probability information and output image information corresponding to the target of interest based on the classified probability information.

The invention discloses a multifunctional power equipment partial discharge comprehensive detection device, and relates to the technical field of power equipment state monitoring and fault diagnosis. The system comprises a multi-mode sensor interface (TEV / HFCT / UHF / air coupling ultrasound), a phase reference and cross-channel alignment unit, a physical scene adaptive window estimation module, an event sparse state fusion unit and a joint criterion and control unit. The device adapts the time difference of arrival and a phase window and generates a frequency band weight according to equipment geometry / medium information, event level judgment is completed under the common constraint of delta t / delta phi consistency, spectral kurtosis and fusion score in combination with an event purification mask and an evidence score, PRPD / PRPS is output, and graded alarming is performed; a coaxial composite ultrasonic wave concentrator improves the acoustic signal-to-noise ratio, and a calibration and traceability unit (a detachable UHF calibration cavity, a fast edge source and a probe identification memory) realizes link sensitivity and group delay field compensation. Power-off-free and cross-scene high-precision detection is realized, false alarm and missing detection are reduced, and consistency and traceability are enhanced.

The invention belongs to the technical field of biological medicine, and discloses preparation of a Zr-based heterojunction sound-sensitive agent and application of the Zr-based heterojunction sound-sensitive agent in synergistic tumor therapy, and the preparation process comprises the following steps: dissolving H2BDC and ZrOCl2. 8H2O in DMF, adding glacial acetic acid, heating, centrifuging and washing to obtain Zr-MOF; the preparation method comprises the following steps: dissolving EDTA-FeNa powder in deionized water, and carrying out ultrasonic mixing, annealing, centrifuging and filtering to obtain Fe-CDs; and finally, the Zr-MOF, the DOX and the Fe-CDs are mixed, and the DOX / Zr-MOF / Fe-CDs are prepared. The DOX / Zr-MOF / Fe-CDs nano platform is formed by combining Zr-MOF and Fe-doped carbon dots (Fe-CDs), so that the DOX / Zr-MOF / Fe-CDs nano platform has excellent sonodynamic and chemical dynamic properties. The nano platform generates a large amount of reactive oxygen species (ROS) under the action of ultrasound, glutathione (GSH) is indirectly consumed through a Fenton reaction, and meanwhile Zr-MOF serves as a protective layer of degradation behaviors, so that DOX / Zr-MOF / Fe-CDs have controllable degradation behaviors. The invention solves the problems that the existing sonosensitizer ROS is low in yield and easy to consume by GSH, and is suitable for tumor treatment.

The invention belongs to the technical field of power management, and particularly relates to an ultrasonic mode control circuit for limiting the lower limit of light load switching frequency. According to the invention, an ultrasonic mode control circuit is designed, and the ultrasonic mode control circuit is nested in the switching converter as an independent circuit and can monitor the switching period. When the switching period is close to the audio frequency range, the DCM state is forcibly quitted, and the flip point of the ZCD is adjusted through the loop to enable the inductive current to flow backward, so that the circuit balance is realized. According to the invention, the problem of noise interference of the current switching power supply converter in an extremely light load state is solved from the source. As the system load is gradually reduced, the circuit switching frequency is gradually reduced so as to improve the conversion efficiency. When the switching frequency is reduced to a designed lower limit threshold, the frequency is stable and does not continue to be reduced. The system has the advantages of a current mainstream control mode for improving light load efficiency, and solves the problem of noise during extremely light load.

A system for characterizing tissue includes a probe that delivers a continuous and periodic mechanical vibration to a tissue of a subject; an ultrasound emitter that emits a sequence of ultrasound shots and an ultrasound receiver that receives corresponding echo signals to track how the tissue is moved by the periodic mechanical vibration delivered to the tissue; and a control module programmed to provide homogeneity information to an operator of the system, the homogeneity information being determined from at least some of the echo signals and being representative of the ability of the tissue to transmit elastic waves and of the homogeneity of the tissue with respect to the propagation of elastic waves.

The utility model discloses a flow regime adjusting device for heavy sediment, which belongs to the technical field of building material stirring, and comprises a tank body and a tank cover arranged at the top of the tank body, a barrel body with a closed top end and an open bottom end is arranged on the inner side of the tank body, and a plurality of flow regime adjusting devices are arranged on the inner side of the barrel body. A feeding port and a discharging port are formed in the side wall of the bottom end and the side wall of the top end of the barrel respectively, a driving motor is installed on the upper surface of the tank cover, and the power output end of the driving motor is in transmission connection with a shaft rod extending to the inner side of the barrel. Meanwhile, small bubbles are formed in the liquid under the cavitation action of ultrasonic waves, and the bubbles expand and contract under the action of sound waves and finally collapse severely under high pressure to generate strong shearing force and shock waves, so that the materials are effectively mixed.

Systems and techniques are provided for generating histotripsy therapy pulses using full cycle transmit. An ultrasonic system may include a transducer array and amplifier electronics. The transducer array may include transducer elements. The transducer elements may be positioned on the transducer array such that the separation between neighboring transducer elements of the transducer elements in both elevation and azimuth is no more than one wavelength of the ultrasonic center frequency of the transducer array. The amplifier electronics may drive the transducer array.

A high-security pet and child confinement gate designed to prevent unauthorized access. The gate incorporates advanced control mechanisms, such as a sensory circuit with a camera, capable of wireless communication with smart devices. The camera can be integrated or removable, providing image data to smart devices. The gate may include a free-spinning mechanism to deter climbing attempts, equipped with sensors and audio devices to produce deterring sounds. Additionally, the gate may include a pressure sensor and an audio device that emits ultrasonic sounds upon detecting crossing attempts. The communication module is adaptive, allowing interaction with cellular networks, Wi-Fi, or Bluetooth, and can receive commands from smart devices to enhance security measures, including sound playback, vibrations, and increased spinning speed.

The invention relates to the technical field of concrete pole processing, and particularly discloses a centrifugal material distribution device for a concrete pole production line, which comprises a base, a mold for processing a concrete pole is arranged on the outer surface of the upper end of the base, a driving device and an ultrasonic assembly are arranged between the base and the mold, and the ultrasonic assembly comprises an ultrasonic emission head; the ultrasonic transmitting head is arranged on the outer surface of one side of the mold and is aligned with the mold through the cross rod, the cross rod is fixedly connected with the base, and the ultrasonic transmitting head is fixedly connected with the cross rod. Bubbles in cement are eliminated by adopting the ultrasonic assembly and utilizing low-frequency ultrasound, so that the production efficiency of the cement pole can be improved while the quality of the cement pole is improved; the coupling agent is adopted as an intermediate medium to be matched with the ultrasonic emission heads, the effect of eliminating bubbles through ultrasound can be achieved on the premise that the number of the ultrasonic emission heads is reduced, meanwhile, the universality of the mold can be guaranteed, and excessive modification of the mold is not needed.

Method for examining a substrate body (108) for a component (102) of a lithography system (1), comprising the steps: a) Generating (S1) at least one marking (112) in an interior (114) of the substrate body (108), b) Emitting (S3) an ultrasound signal (134) and receiving an ultrasound signal (136) reflected at the at least one mark (112), and c) Determine (S4), spatially resolved, one or more parameters (P) of the substrate body (108) based on the received ultrasound signal (136).

An exemplary system and method for fetal monitoring using a trained AI model configured to provide an estimation of movements from an audio recording acquired from the patient's user device. The exemplary system and method can be used to provide at-home monitoring of fetal movement to prompt the mother to seek medical attention without the need for specialized ultrasound equipment or fetal heart rate monitoring.

According to the capacitive deionization seawater desalination device adopting the ultrasonic enhanced flowing electrode charging method, after a positive / negative flowing electrode is charged to adsorb ions, the potential difference of a system is improved by utilizing charges loaded on the surface of the positive / negative flowing electrode, so that the adsorption capacity on opposite-polarity charge ions is enhanced; meanwhile, an ultrasonic field is coupled to one side of a current collector of the flow electrode capacitive deionization device, and the collision contact frequency and the ion migration rate among active particles are improved by utilizing acoustic streaming and acoustic cavitation effects generated by ultrasound, so that the adsorption efficiency and the charge loading capacity of the flow electrode are improved. Compared with the prior art, the invention has the following beneficial effects: 1, the electric potential difference between the positive electrode and the negative electrode is increased by utilizing charges loaded on the surface of the flowing electrode, and the electric field driving force and the attraction force to anisotropic charge ions are enhanced, so that the ion adsorption efficiency is improved; and 2, the ultrasonic field is coupled with the flow electrode capacitive deionization device, so that the collision contact frequency and the ion migration rate among active particles in the flow electrode are improved, and the charge loading capacity of the flow electrode is further improved. And 3, compared with the traditional flow electrode capacitive deionization technology, the capacitive deionization seawater desalination device adopting the ultrasonic enhanced flow electrode charging method has the advantages that the average desalination rate is improved by 223.78% or above, and the charge efficiency is improved from 70% or below to 90% or above.

The present invention discloses a method for degrading organic pollutants by synergistic action of persulfate, ultrasound and stirring, which includes: S1, adjusting the pH of the wastewater containing organic pollutants to 3.00 - 10.60 and then adding persulfate, or adjusting the pH of the wastewater containing organic pollutants to 3.00 - 7.70 and then adding persulfate and metal ions, where the metal ions are one or more of Fe<supgt;3+< / supgt>, Cu<supgt;2+< / supgt>, Al<supgt;3+< / supgt>, Ag<supgt;+< / supgt>, Ni<supgt;2+< / supgt>, Mg<supgt;2+< / supgt>, Ca<supgt;2+< / supgt>, Co<supgt;2+< / supgt>; S2, placing the wastewater obtained in S1 in an ultrasonic device, performing ultrasound and simultaneously starting stirring under the condition that the ultrasonic temperature is 25 - 55 °C, and completing the degradation of the organic pollutants in the wastewater after 5 - 120 min of ultrasonic stirring treatment. The present invention has a significant enhancement effect on the degradation efficiency under the action of ultrasound and mechanical stirring, in synergistic action with persulfate, can strengthen the degradation technology, and can provide a reference for the field of industrial wastewater treatment.

The utility model discloses a self-power-taking type ultrasonic bird repelling device which comprises a self-power-taking assembly arranged on a power transmission line, a bird repelling assembly is arranged on one side of the self-power-taking assembly in the axial direction, and the self-power-taking assembly supplies power to the bird repelling assembly. The bird repelling assembly comprises a supporting shell fixedly arranged on one axial side of the self-power-taking assembly, a sounder is fixedly arranged on the supporting shell, and a bearing shell is rotationally arranged on the periphery of the supporting shell; a plurality of wind power fan blades are evenly arranged on the periphery of the bearing shell, a plurality of blocking pieces are evenly arranged on the bearing shell, the blocking pieces can rotate along with the bearing shell to sequentially cover the sounding position of the sounder, and the elastic modulus or density of the blocking pieces is different. The problems that in the prior art, the sound production characteristic of a self-powered ultrasonic bird repelling device is easily adapted to birds, and the bird repelling effect of the self-powered ultrasonic bird repelling device is not lasting are solved.

The invention discloses a system and a method for intelligently monitoring an oil leakage point location of a submarine pipeline by using ultrasound, and relates to the technical field of information technologies. Through innovative sensor layout and intelligent signal processing, sensitivity and reliability of submarine pipeline oil leakage detection are improved, and real-time positioning and rate estimation of oil leakage are achieved. The system comprises a detection unit and a monitoring platform, the detection unit comprises a plurality of adhesion type self-positioning ultrasonic sensor nodes arranged on the outer surface of the submarine pipeline, a plurality of floating type acoustic monitoring buoys arranged in a water area above the submarine pipeline, and a flexible bionic fin underwater moving device; the monitoring platform can carry out frequency domain cavitation feature extraction and mode recognition based on a deep learning model on the collected signals, judges whether oil leakage occurs or not by fusing multi-modal data, and transmits leakage alarm information to the land-based monitoring center when oil leakage is determined; the invention further discloses a method for monitoring the oil leakage point location of the submarine pipeline based on the system.