210 results about "Ultrasonic transducer array" patented technology

The invention provides a multichannel gas ultrasonic flowmeter, which relates to the technical field of flow measurement and comprises a hardware layer and a software layer, the hardware layer comprises a pipeline, a connecting mechanism, a multichannel ultrasonic transducer, a pressure sensor, a temperature sensor, a wiring terminal box and a control box with an LCD display screen; the software layer comprises a data acquisition module, a preprocessing module, a multichannel speed measurement module, a data fusion module, a dynamic parameter compensation module, a flow calculation module, a man-machine interaction module, a communication module and a storage module. Pipeline section flow velocity information is collected through a multichannel ultrasonic transducer array, and a complex flow state is fitted in combination with a weighted fusion algorithm; the flow is dynamically compensated and corrected based on pressure and temperature; reliable operation of the system is guaranteed by means of hardware redundancy and a software verification diagnosis mechanism, the problems that a traditional flowmeter is low in measurement precision and poor in working condition adaptability are solved, and high-precision and stable gas flow measurement is achieved.

The invention discloses an ultrasonic transducer array control method, an ultrasonic flowmeter, equipment, a storage medium and a program product, the array element spacing of an ultrasonic transducer array is larger than half of the ultrasonic wave length, the ultrasonic transducer array comprises a plurality of channels, and the method comprises the steps that the same excitation signals are applied to the channels respectively; wherein the excitation signals between the adjacent channels have time delay, so that the ultrasonic transducer array generates a multi-valve ultrasonic sound field. Therefore, controllable adjustment of the number and the direction of the valves can be realized by changing the array element spacing and the sequential control parameters of the excitation signals, and the flexibility and the adaptability of an ultrasonic sound field are effectively improved.

The invention provides an ultrasonic transmission CT (Computed Tomography) imaging method and system, a computer and a storage medium, which can be used for quickly reconstructing an ultrasonic transmission image with high resolution and high contrast. The method comprises the following steps: in layer-by-layer scanning of an annular ultrasonic transducer array, calculating a TOF (Time of Flight) matrix containing transmission time of all ultrasonic paths after the annular ultrasonic transducer array rotates by a specific angle each time; after one layer of scanning is completed, the TOF matrixes of different angles are recombined into a three-dimensional matrix according to the spatial relation, and missing data are complemented; discretizing an area to be imaged into two-dimensional grids, making each grid correspond to a pixel point, counting transmission time and path length of all ultrasonic paths penetrating through the pixel point, calculating sound velocity contribution values of the paths, taking an average value as a sound velocity value of the pixel point, and generating a two-dimensional ultrasonic transmission image; a two-dimensional image is converted into a three-dimensional image through a ray casting algorithm, the visual influence of voxels is adjusted by introducing a weight factor based on depth, and the depth perception and semitransparent rendering effect of the image are enhanced.

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 present invention relates to an endoscopic probe for photoacoustic tomography of cavity side walls, characterized by comprising a hollow tubular probe housing with a closed front end; N acoustic wave receiving windows and M laser output windows formed on the side wall of the tubular probe housing; an array of linear laser output ports connected to a pluggable optical fiber connector via an optical fiber bundle; and an ultrasonic transducer array connected to a multi-channel signal connector via a signal harness. The present invention employs a method of arranging array transducers and array laser outputs on the side wall of the probe, eliminating the need for a reflector. The probe is less than 2 centimeters in size and can be placed in close proximity to the prostate through the rectum for photoacoustic imaging of the prostate, or in close proximity to the inner wall of the rectum for photoacoustic imaging of the inner wall of the rectum. The endoscopic probe provided by the present invention, combined with a photoacoustic imaging system host, utilizes photoacoustic endoscopic imaging technology to perform real-time transrectal prostate imaging and rectal imaging, achieving ideal imaging results.

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 relates to the technical field of ultrasonic wind measurement, in particular to a high-precision wind measurement system and method based on double-frequency ultrasonic waves, and the method comprises the steps: deploying an orthogonal double-frequency ultrasonic transducer array in a horizontal plane, capturing an echo timestamp, and solving the wind speed through the dynamic changes corresponding to the high and low frequency characteristics; according to the forward and reverse wind round-trip time difference of the double-frequency ultrasonic waves on the X axis and the Y axis, the real-time temperature obtained through temperature compensation is combined, the wind speed components of the high-frequency ultrasonic waves and the low-frequency ultrasonic waves are calculated according to a forward and reverse wind formula, the X-axis final wind speed component and the Y-axis final wind speed component are obtained through weighted averaging, the wind direction angle is calculated according to an arc tangent function, and wind speed and direction results are output after quadrant correction; the wind speed and direction data obtained through calculation are preprocessed, and finally the processed data are stored in an internal storage. Double-frequency ultrasonic waves are adopted, high frequency is used for capturing rapid wind speed changes, low frequency is used for long-distance propagation to reduce environmental noise influences, the wind speed is solved in combination with a sound velocity formula, temperature compensation and a propagation equation, and high-precision measurement can be achieved.

The utility model discloses an ultrasonic anti-eavesdropping and display device, the anti-eavesdropping device comprises an ultrasonic generator and an ultrasonic transducer, the ultrasonic generator at least inputs an ultrasonic signal of one driving frequency to the ultrasonic transducer for emission, and the ultrasonic transducer adopts a transparent electrostatic ultrasonic transducer array. According to the utility model, the sound recording eavesdropping can be effectively shielded by directly sending an ultrasonic interference signal or an interference signal carried on an ultrasonic carrier signal by utilizing the inaudible property of ultrasonic waves and the inherent nonlinearity of an acoustic device and combining the acoustic parametric array theory; in addition, the ultrasonic anti-eavesdropping device can be combined with a display device, and the application field of the ultrasonic anti-eavesdropping device is expanded.

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.

According to the potato primary processing cleaning equipment and the ultrasonic cleaning parameter adjusting method thereof, when the residual amount of stains on the surfaces of potatoes exceeds the preset cleaning threshold value and the skin damage rate of the surfaces of the potatoes is lower than the safety limit value, the ultrasonic transducer array in the cleaning equipment is started for ultrasonic cleaning; the collaborative correction coefficient of the ultrasonic duty ratio in potato ultrasonic cleaning is determined according to the load capacity of microorganisms in the cleaning solution and the turbidity descending gradient; dynamically distributing an ultrasonic frequency weight in primary processing and cleaning of the tubers according to the types of stains on the surfaces of the tubers, and dynamically optimizing the output power of the ultrasonic transducer array through a collaborative correction coefficient and the ultrasonic frequency weight; micro-nano bubbles are injected into the cleaning liquid by using the optimized ultrasonic output power, the low-frequency ultrasonic mode is switched to until the turbidity of the cleaning liquid reaches the standard, ultrasonic cleaning is stopped when the turbidity reaches the standard, and multi-parameter coordinated adjustment of the output power in potato ultrasonic cleaning can be achieved based on the scheme.

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.

The invention belongs to the technical field of mine ventilation and resistance monitoring, and particularly provides an ultrasonic precise wind measurement and resistance online monitoring method and related equipment thereof.The method mainly comprises the steps that original sound wave features collected by an ultrasonic transducer array are obtained, and an initial feature data set is generated through integration; based on the initial feature data set and the underground propagation calibration value, a dust propagation resistance time difference set is generated through fusion; analyzing a roadway space grid according to the dust propagation resistance time difference set, and generating a resistance hot area distribution map; calculating a grading resistance state index through dynamic flow field comparison of a resistance hot area distribution map; and generating a space coordinate safety instruction according to a positioning result of the graded resistance state index. According to the method, interference of multiple factors such as dust on sound wave propagation in a complex environment can be accurately corrected, the calculation precision of the propagation time difference value is remarkably improved, roadway resistance distribution analysis and safety instruction space coordinate generation are optimized, and the accuracy and reliability of mine ventilation monitoring are practically guaranteed.

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.