171 results about "Ultrasonic transducer array" patented technology

The invention provides an ultrasonic detection method for internal defects of an insulating part of a power system based on a piezoelectric ultrasonic transducer, and belongs to the technical field of insulating part detection. After wavelet denoising and deep attenuation compensation are carried out on echo signals, sound path distance time delay and sound pressure amplitude parameters are extracted, defect identification and position estimation are carried out by utilizing a layered variational auto-encoder, a high-frequency transducer is switched to aiming at tiny defects, a harmonic component is extracted by adopting a nonlinear ultrasonic method, and a characteristic size is calculated; a defect distribution space feature matrix is generated based on a synthetic aperture focusing technology, a unified or personalized processing strategy is selected according to an acoustic characteristic homogenization degree evaluation value, a complete defect detection result is output, and the technical problem that deep weak defects in the electric insulation part are difficult to accurately detect and recognize is solved.

The invention relates to the technical field of multi-mode ultrasonic flow nonlinear error compensation scheme design, in particular to a multi-mode ultrasonic flow nonlinear error compensation method and system. The method comprises the following steps: acquiring propagation time data of different sound wave paths through a multi-ultrasonic transducer array; extracting a multi-modal characteristic parameter reflecting the nonlinear characteristic of the fluid; abnormal types such as bubble interference, solid impurities or turbulence are identified based on the characteristic parameters; calling a preset compensation model which is matched abnormally to generate a dynamic correction parameter; and fusing the parameter and the path weight coefficient to reconstruct an accurate flow value. The system is correspondingly provided with a sensing module, a feature extraction module, an interference identification module, a dynamic compensation module and a flow reconstruction module. The measuring bottleneck of a traditional flowmeter in complex fluid is broken through, and through the synergistic effect of interference type recognition and a dynamic compensation model, the measuring precision, the environmental adaptability and the long-term stability under the complex working condition are remarkably improved.

The invention provides a high-precision three-dimensional ultrasonic wind speed measurement method and device, the method is applied to an ultrasonic transducer array, a plurality of transducers in the transducer array are arranged according to a non-orthogonal structure to form a plurality of acoustic measurement paths, and the specific steps are as follows: acquiring ultrasonic signals collected on the plurality of acoustic measurement paths; for each acoustic measurement path, determining a downwind and upwind propagation time difference of ultrasonic waves on the path based on cross-correlation operation and sine wave fitting; and calculating a three-dimensional wind speed vector based on the geometrical relationship of each acoustic measurement path and the corresponding propagation time difference, thereby achieving the technical effects of remarkably improving the anti-interference capability, greatly improving the measurement precision, remarkably improving the calculation speed, optimizing the spatial symmetry, enhancing the environmental adaptability and improving the measurement robustness.

The invention discloses a cast-in-place pile pouring process quality detection method capable of sensing ERT on the inner side and the outer side. The cast-in-place pile pouring process quality detection method comprises the steps that conductivity information of the inner side and the outer side of a cast-in-place pile is collected through an electrical resistance tomography electrode array arranged at the bottom of a cast-in-place pile feeding guide pipe; the two-dimensional position information of the electrical resistance tomography electrode array in the pile hole in the horizontal direction is positioned through an ultrasonic transducer array arranged at the bottom of the feeding guide pipe; the depth information of the electrical resistance tomography electrode array is acquired through an incremental encoder and a roller which move along with the feeding guide pipe in the vertical direction; transmitting the obtained conductivity information, the two-dimensional position information and the depth information to a computer imaging system to obtain a three-dimensional conductivity distribution image of the cast-in-place pile, and analyzing the obtained image to realize quality detection of the cast-in-place pile. Total cross-section imaging of concrete and a reinforcement cage can be achieved, and the positions and sizes of karst caves and collapse possibly existing in the pile hole wall can be accurately measured.

The embodiment of the invention discloses an ultrasonic nerve regulation and control system. The system comprises an ultrasonic transducer array, a signal generation module and a power amplification module, wherein the signal generation module is used for determining a target nerve rhythm in response to a nerve regulation instruction for a target brain region, and determining a target ultrasonic parameter matched with the target nerve rhythm from each candidate ultrasonic parameter; the signal generation module is also used for generating an ultrasonic signal according to the target ultrasonic parameter; the power amplification module is used for amplifying the ultrasonic signal to obtain an amplified ultrasonic signal; and the ultrasonic transducer array is used for outputting ultrasonic waves to the target brain region according to the amplified ultrasonic signals so as to induce neural activity matched with the target neural rhythm in the target brain region. According to the technical scheme provided by the embodiment of the invention, the fineness of nerve regulation and control can be improved.

An ultrasonic imaging system has a bias-switchable, ultrasonic transducer array and a bipolar voltage source. The array has a dielectric layer having a top surface and a bottom surface; top and bottom electrode strips in electrical contact with the top and bottom surface of the dielectric layer, the bottom electrode strips being oriented at a non-zero angle relative to the top electrode strips. There is an acoustic matching layer or multiplicity of matching layers on the front-side of the array and a leakage-current mitigation layer. The bipolar voltage source is connected to each of the top and bottom electrode strips to induce a polarization in the dielectric layer, the bipolar voltage source being capable of switching between a high voltage state and a low voltage state. A controller controls the bipolar voltage source, and pulsing to and receiving signals from the top and bottom electrode strips.

An ultrasonic transducer array of this invention includes a rigid support plate with a through-hole group including through-holes, a flexible resin film fixed to the support plate so as to cover the through-holes, and piezoelectric elements fixed to the flexible resin film so that middle portions overlap the corresponding through-holes and peripheral portions overlap the support plate, wherein the piezoelectric elements include transmission piezoelectric elements forming transmission transducers that generate ultrasonic waves in response to driving voltage signal having a predetermined driving frequency and one or plural reception piezoelectric elements forming one or plural reception transducers that generate reception voltage signals in response to ultrasonic waves, and wherein the transmission transducer is of a non-resonant type that generates ultrasonic wave without resonant vibration in response to the driving voltage signal and the reception transducer is of a resonant type that performs resonant vibration in response to ultrasonic wave having a frequency corresponding to the driving frequency.

The invention provides a wearable patch based on flexible ultrasonic sensing and a use method, and relates to the field of medical monitoring equipment. The sensor comprises a sensing module, a self-adaptive signal processing module and a wireless data transmission module which are packaged by a flexible material and form an integrated flexible packaging layer, the sensing module comprises an ultrasonic transducer array, and the ultrasonic transducer array comprises a plurality of ultrasonic transducers; an ultrasonic transducer; the adaptive signal processing module comprises a microprocessor, an analog front end and a digital signal processor. Through fusion of a flexible electronic technology and ultrasonic sensing, the technical limitation of traditional rigid equipment is broken through, wearable, continuous and non-invasive blood pressure and blood flow synchronous monitoring is achieved, and an important technical scheme is provided for cardiovascular health management, disease early diagnosis and personalized medical treatment.

Embodiments of the present application relate to the technical field of medical instruments, and disclose an ultrasonic device and system, a beamforming method, an electronic device and a storage medium. The ultrasonic device comprises a probe, the probe comprising an ultrasonic transducer array assembly, configured to emit ultrasonic waves and collect echo signals of human tissue; and a processing assembly, configured to: when the probe is stationary for more than one collection cycle, the processing assembly acquires echo collection information of a current window in a current collection cycle, and performs beamforming on the echo signals of the current window according to weight matrix parameters of a window corresponding to the current window in a previous collection cycle, and meanwhile, obtains the weight matrix parameters of the current window according to the echo collection information of the current window, so as to perform beamforming on echo signals of a window corresponding to a next collection cycle according to the weight matrix parameters of the current window in the next collection cycle, the collection cycle comprising at least one window. This is favorable to improving the accuracy and real-time performance of ultrasonic imaging of human tissue.

The invention relates to the technical field of laser intelligent manufacturing, and discloses a laser cladding and cutting combined machining system based on machine learning, which comprises three core units, namely a multi-mode sensing core unit, a central processing core unit and a laser machining execution core unit. The multi-mode sensing unit integrates a scanning galvanometer type thermal infrared imager and a non-contact ultrasonic transducer array, and synchronously collects a surface temperature field and internal acoustic impedance. An acoustic-thermal correlation health model is arranged in the central processing unit, and internal hidden defects are identified on line by comparing health acoustic characteristics predicted by real-time temperature with a measured value. Therefore, the feed-forward parameter planning module fuses the physical state field and the defect identification result, dynamically plans and outputs an optimal process parameter sequence, and drives a laser processing execution unit to complete adaptive processing. According to the method, closed-loop self-adaptive regulation and control are realized through acoustic-thermal multi-mode information fusion and feedforward control, formation of internal defects can be effectively predicted and inhibited, and the quality, consistency and reliability of processed finished products are remarkably improved.

A system and method for high-resolution, non-invasive characterization of a cranial cavity and its contents through an intact skull.

The application provides a distributed ultrasonic transducer array and a control method thereof. The distributed ultrasonic transducer array comprises a plurality of unit ultrasonic transducers, the outer contour of the amplitude rod of each transducer is provided with a plurality of continuous cylindrical sections in the axial direction, each section is composed of a first cylindrical surface and a second cylindrical surface, the generatrix is a circular arc or a broken line symmetrical about the center line, and each cylindrical section forms an acoustic focal point with different radial distances in the medium. The plurality of transducers are arranged along the pipeline, and the focal domain distribution of adjacent transducers is arranged in the same or complementary mode, so that the radial focal domain of each transducer is spatially staggered and the energy is superposed, forming a synthesized sound field with small sound pressure fluctuation and uniform distribution. The application can realize large-range and high-uniformity cavitation treatment with fewer ultrasonic transducers, and can realize spatial differentiation regulation and control of focal energy according to the concentration distribution of pollutants, thereby significantly improving the treatment efficiency and engineering economy.

The invention provides a printed fabric surface flaw automatic detection method and system based on computer signal processing, and relates to the technical field of data processing.The method comprises the steps that an ultrasonic transducer array is arranged above a fabric advancing path, and the starting end and the tail end of the path are each fixedly provided with a photoelectric position sensor; determining a virtual reference direction based on fabric edge position information detected by two photoelectric position sensors in real time; analyzing the virtual reference direction into a plurality of continuous analysis intervals; evaluating tension and flatness attributes of the fabric in each analysis interval to obtain a dynamic adjustment value; and performing real-time adjustment on emission parameters of the ultrasonic transducer array based on the dynamic adjustment value, emitting regulated specific-frequency ultrasonic waves to the surface of the fabric, and receiving reflection echoes to obtain original acoustic signal data of the fabric. According to the invention, high-adaptability automatic detection of printed fabric surface and near-surface flaws is realized.

The application discloses a method for improving focusing efficiency of a ring-shaped ultrasonic transducer array, comprising the following steps: firstly, collecting two groups of echo signals of single emission and multiple reception and self emission and self reception of the ring-shaped ultrasonic transducer array, calculating positions of each transducer element, completing position calibration of the ring-shaped ultrasonic transducer array, and reducing focusing deviation caused by transducer assembly error; and secondly, using the ring-shaped ultrasonic transducer array to perform ultrasonic imaging on a target to be heated, analyzing imaging results, and adjusting transmission delay of the transducer element to reduce focusing deviation caused by uneven medium of the object to be heated. Through the above two steps, the ring-shaped ultrasonic transducer array can maximize the concentration of sound energy on the position to be heated in the focusing process, and the purpose of improving the focusing efficiency of the ring-shaped ultrasonic transducer array is achieved.

The present application relates to the field of enzymatic reaction device, specifically to an enzyme protein ultrasonic pretreatment and temperature control enzyme acceleration reaction system and operation method, which is used to solve the contradiction between enzymatic efficiency and enzyme activity and the problem of insufficient dynamic stability of reaction conditions. The system includes a reaction container, a bearing structure, an ultrasonic transducer array, an ultrasonic generator, a temperature sensor, a temperature control device, an enzymatic reaction monitoring module and a controller; the ultrasonic pretreatment improves the accessibility of the substrate, the temperature control device maintains the stability of the reaction temperature, the monitoring module collects pH and turbidity data in real time, and the controller outputs a termination signal based on the turbidity threshold. The system is mainly used in the enzymatic reaction process of enzyme protein to improve the reaction efficiency and product quality.

The application discloses an ultrasonic networking system and method for natural gas well site pipeline sulfur deposition detection, and relates to the technical field of ultrasonic nondestructive testing. The system comprises a plurality of ultrasonic detection sub-stations, an edge computing gateway and a central server installed on the pipe wall. The detection sub-station comprises a multi-channel ultrasonic transducer array, an adaptive composite coupling component and an embedded data acquisition control module. The composite coupling component uses a miniature fluid driving component to pump a thixotropic high acoustic gel, realizing maintenance-free dynamic self-healing coupling. The control module uses CFAR detection and multi-feature classification algorithm to accurately separate the steel-sulfur-gas multi-interface echo to calculate the deposition thickness. The edge computing gateway gathers multi-point data to perform trend correlation analysis, and the central server constructs a multi-dimensional evolution model and outputs a graded warning accordingly. The application realizes non-invasive and continuous high-precision monitoring of pipeline sulfur deposition under non-stop working conditions, effectively predicting the risk of regional blockage.

The utility model discloses a non-contact haptic feedback system based on an ultrasonic transducer array. The non-contact haptic feedback system comprises the ultrasonic transducer array, an FPGA (Field Programmable Gate Array) signal conversion and driving module and a data signal feedback module, the ultrasonic transducer array consists of a circuit board and a shell; the signal output end of the FPGA signal conversion and driving module is connected to a circuit board of the ultrasonic transducer array; and the data signal feedback module is connected to the signal input end of the FPGA signal conversion and driving module. By designing the non-contact haptic feedback system which not only can realize non-contact touch, but also can realize real-time automatic adjustment of an ultrasonic focusing position, the problem that an ultrasonic focusing point in an existing non-contact haptic system cannot be automatically tracked and adjusted according to the change of a finger position is solved.

The invention relates to a controller for driving an array of ultrasonic transducers capable of generating an acoustic field providing a tactile sensation at a distance, comprising: an input interface configured to receive a delay command (Cd) and a modulation command (Cm); for each ultrasonic transducer, a generator (7) of an actuation signal for the ultrasonic transducer, capable of being controlled by a control circuit (8) to deliver voltage pulses with a delay conforming to the delay command (Cd) and a modulation exploiting a modulating signal whose modulation frequency, which can take several values, is set by the modulation command (Cm); an output interface configured to provide the actuation signals to the ultrasonic transducers. Figure 4 (for the abstract)

The application discloses an ultrasonic imaging system for accurately collecting heart sections in any body position, which comprises a plurality of two-dimensional ultrasonic arrays randomly distributed in space, a multichannel ultrasonic signal collecting module and a three-dimensional ultrasonic imaging module; the plurality of two-dimensional ultrasonic arrays, the multichannel ultrasonic signal collecting module and the three-dimensional ultrasonic imaging module are sequentially connected; wherein the plurality of two-dimensional ultrasonic arrays comprises a plurality of ultrasonic transducer arrays forming sub-area line scanning or sub-area surface scanning or cross surface scanning; the application provides doctors with more detailed images, which is helpful for more accurately positioning and evaluating lesions; can solve the problems of difficulty in collecting correct imaging sections, imaging section changes in motion and the like in wearable ultrasonic heart imaging; is not only suitable for the heart, but also suitable for the brain, the liver, the kidney, the urinary bladder, the abdominal aorta, the inferior vena cava and the like human tissues and parts.

An ultrasonic diagnosis system according to an embodiment of the present disclosure includes a plurality of ultrasonic output patches configured to be attachable to different body parts, a data receiving unit configured to receive data transmitted from the plurality of ultrasonic output patches, a processing unit configured to acquire an imaging result related to the body part by processing the data, and an output unit configured to output the imaging result related to the body part, in which the ultrasonic output patch includes a multichannel ultrasonic transducer array configured to output imaging ultrasonic waves toward the body part and receive the reflected ultrasonic waves, a signal processing module configured to process a signal transmitted to or received from the multichannel ultrasonic transducer array, and a communication module configured to transmit a signal processing result, which is acquired by the signal processing module, to the data receiving unit.

The invention provides a two-dimensional coding and decoding method for ultrasonic synthetic aperture imaging. The method comprises the following steps of: generating an order Hadamard matrix, which is a multiple of 8, for an ultrasonic transducer array with an array element; according to the requirements of the axial resolution and the near-field dead zone range, a level serial coding matrix is generated; a Hadamard matrix and a serial coding matrix are used to generate a two-dimensional coding matrix through matrix multiplication, and common coding emission and acquisition are carried out; performing dual decoding on the acquired echo data according to the two-dimensional coding matrix; and performing synthetic aperture imaging by using the decoded data. According to the invention, the depth and contrast of ultrasonic synthetic aperture imaging can be improved.

A system for coherence imaging may receive ultrasound signals each having a respective delay associated with a respective ultrasonic transducer element in an ultrasonic transducer array. The system may obtain an approximation of the auto-correlation of ultrasound signals without any auto-correlation calculation, and determine the output image based on the approximation. In approximating the auto-correlation, the system may group the ultrasound signals into multiple portions, each corresponding to a respective sub-aperture of a plurality of sub-apertures of the ultrasonic transducer array. The system may determine a coherent sum of signals for each sub-aperture, perform a square operation or magnitude square operation over the coherent sum to obtain resulting data, normalize the resulting data, and sum the resulting data for all of the sub-apertures to generate the output image. A sub-aperture in the plurality of sub-apertures may overlap with another sub-aperture.

An ultrasound imaging and backscatter system includes an ICE ultrasound catheter having an ultrasound pMUT transducer array disposed within a distal end of the ultrasound catheter and including a plurality of transducer array elements disposed on a substrate. One end of the catheter shaft is connected to the handle assembly and the other end is connected to the ultrasonic transducer array. The catheter shaft accommodates an electronic flexible cable in communication with the signal trace and directs each of the plurality of transducer array elements to transmit and receive an ultrasound beam, receives at least one signal from the plurality of transducer array elements, and constructs at least one image characterizing one or more tissue components of the scanned object. An ultrasound imaging system is used to measure tissue thickness, tissue scar, and lesion assessment for left atrium, right atrium, left ventricle, and right ventricle tissue wall characteristics and other intracardiac tissue anomalies.

The application discloses a kind of array synergic excitation ultrasonic probe battery defect imaging and intervention method and device, the method includes using high-frequency ultrasonic array to soft package battery is scanned, obtains the echo signal data of the soft package battery;According to the echo signal data generation the defect thermodynamic diagram of the soft package battery, according to the defect thermodynamic diagram determines the position and range of the soft package battery defect region;According to the position and range of the defect region, using low-frequency ultrasonic transducer array to the soft package battery is synergic excited, to carry out directional ultrasonic intervention to the defect region.The imaging and positioning of battery internal defect are realized by high-frequency ultrasonic array, and based on positioning result, using low-frequency high-power multi-transducer array to battery is synergic intervened, forms detection and repair closed-loop control mechanism, improves the pertinence and effectiveness of defect intervention, to reduce the damage risk to battery structure.

A method of targeting energy transmission using an ultrasonic transducer array (101, 102) on an implantable device (131) is disclosed. The method includes generating, by at least one ultrasonic transducer (111), a first ultrasonic wave having at least one frequency and at least one amplitude, transmitting the first ultrasonic wave to the implantable device (131), transmitting an echo signal from the implantable device (131) back to the ultrasonic transducer array (101, 102), picking up the echo signal by the ultrasonic transducer array (101, 102) such that one or more ultrasonic transducers (111) acquire a plurality of received signals, and coupling the received signals to a processor to produce a time reversed signal; and modulating the one or more ultrasonic transducers (111) to produce a time reversed wave in accordance with the time reversed signal to transmit ultrasonic energy to the implantable device (131), wherein the time reversed wave experiences constructive interference at a location from which the echo signal was transmitted.

The application relates to a manufacturing method of a large-bandwidth high-density flexible array ultrasonic transducer, which comprises the following steps: performing groove processing on the upper surface of a preset polymer material to obtain a plurality of grooves, filling conductive material in the grooves to obtain a composite conductive matching layer; stacking at least one layer of the composite conductive matching layer and a preset piezoelectric layer to obtain a matching-piezoelectric layer array; arranging a positive electrode layer and a negative electrode layer on the two end surfaces of the matching-piezoelectric layer array respectively to obtain an ultrasonic transducer array; and cutting the ultrasonic transducer array to obtain a plurality of ultrasonic transducers. In the application, the layers are matched through interfaces to realize acoustic-electric performance synergistic optimization, electric energy is conducted through the conductive matching layer, an integrated matching layer is realized, inefficient individual matching layers are avoided, the production efficiency is significantly improved, and batch manufacturing of the large-bandwidth high-density flexible array ultrasonic transducer is realized.

The application relates to a kind of distributed ultrasonic wind field detection methods based on multi-unmanned aerial vehicle cooperation, belong to low-altitude meteorological detection field, method includes: multi-source high-precision space-time datum acquisition;Each unmanned aerial vehicle node is launched by its ultrasonic transducer array and executes the composite modulation emission and echo demodulation of detection signal to obtain accurate sound wave round trip propagation time;Link length is weighted and fused calibration, and the spatial direction vector under non-orthogonal topology is reconstructed;Kinematics projection elimination and rotor flow field distortion compensation are carried out to extract pure aerodynamic wind field information;By constructing non-orthogonal observation matrix, the horizontal wind field component of the to-be-measured meteorological airspace is solved;Original solving vector is subjected to time domain filtering processing, and stable wind direction and wind speed information is output.The application eliminates the influence of carrier motion and mechanical vibration on acoustic measurement and adapts flexible detection topology, so that high-precision, multi-point correlation real-time stable monitoring of low-altitude area wind field is realized.

The invention relates to the technical field of intelligent medical instruments, and discloses a bipolar emission method and device for real-time three-dimensional intracardiac ultrasonic imaging. The method is applied to an intracardiac ultrasonic imaging catheter, and bipolar charging and discharging of an ultrasonic transducer array element, generation of symmetrical bipolar ultrasonic signals, elimination of direct-current components and improvement of image quality are achieved by controlling switching on and switching off of a positive high-voltage end switch and a negative high-voltage end switch. The device comprises a positive high-voltage end, a negative high-voltage end, a discharge loop switch and a control unit, is integrated in an ASIC (Application Specific Integrated Circuit) of an intracardiac ultrasonic imaging catheter, supports duty ratio dynamic adjustment, inverse emission and unipolar compatible modes, adapts to different scene requirements, and effectively improves the efficiency and accuracy of ultrasonic imaging.

The invention discloses a lead-free piezoelectric micromechanical ultrasonic transducer array and electronic equipment, and relates to the technical field of micro electro mechanical systems, the lead-free piezoelectric micromechanical ultrasonic transducer array comprises a plurality of super pixels, and each super pixel is composed of a plurality of piezoelectric micromechanical ultrasonic transducer PMUT units; the PMUT unit comprises a bottom electrode, a lead-free piezoelectric layer and a top electrode which are stacked in sequence; wherein the array layout of the super pixels and the structural parameters of the PMUT units are collaboratively optimized, so that the transducer array has the characteristics of high emission pressure and wide bandwidth when working in a target medium through the acoustic coupling effect between the units. By arranging the lead-free piezoelectric layer and combining with collaborative optimization of super pixel layout and PMUT unit structure parameters, the emission performance and the bandwidth of the lead-free material-based transducer are improved. Through collaborative optimization of the array layout of the super pixels and the structural parameters of the PMUT units, the array is finally enabled to have the characteristics of high emission pressure and wide bandwidth in a target medium by using the acoustic coupling effect between the units.