56 results about "Ultrasonic attenuation" patented technology

The invention relates to a calibration method of an ultrasonic flaw detector calibrating device, which comprises the following steps of: acquiring and transmitting ultrasonic waves of which the frequency is matched with the theoretical frequency of a material to be detected, acquiring and dynamically correcting the actual propagation path of the ultrasonic waves in real time, generating a calibration parameter of a frequency-delay compensation coefficient, and compensating the transmitted ultrasonic waves based on the calibration parameter. After the compensated ultrasonic waves enter a to-be-detected material, time-base line signals are collected and input into the trained deviation calculation model to calculate time axis scale deviation, time-base line linearity is adjusted based on the time axis scale deviation, stepped ultrasonic attenuation signals are generated, echo signal amplitude values of the flaw detector are collected, and the amplitude values of the echo signals of the flaw detector are calculated. And comparing the echo signal amplitude value with a preset amplitude threshold value to obtain a dynamic difference value of the two, and adjusting the attenuation amount in real time based on the dynamic difference value. The problems of insufficient calibration efficiency and consistency, poor dynamic parameter adaptability, limited sensitivity calibration precision and complex working condition simulation capability in the prior art are solved.

The invention relates to the technical field of concrete testing, in particular to a concrete testing method which comprises the following steps: manufacturing a plurality of groups of standard-size concrete test pieces according to a preset concrete mix proportion, and respectively placing the standard-size concrete test pieces under a simulated curing condition and a standard curing condition for curing in a preset curing period to form a first test group and a first control group; based on a plurality of detection points, carrying out a rebound test and an ultrasonic test on the concrete test pieces in the first test group, and determining a high-frequency ultrasonic section to determine an ultrasonic attenuation coefficient of a single concrete test piece, according to the ultrasonic propagation speed, the ultrasonic attenuation coefficient and the detection rebound value, constructing a concrete strength-based correction model to obtain the comprehensive compressive strength of the concrete test pieces in the first test group, and determining the standard compressive strength corresponding to the concrete test pieces in the first control group, and determining an initial influence coefficient of the simulated maintenance condition according to the comprehensive compressive strength and the standard compressive strength. The compressive strength of the concrete structure is effectively tested.

The invention discloses a metal 3D printing detection method and device based on emission spectrum and ultrasonic fusion. The method comprises the following steps: synchronously exciting and collecting full-wave band spectrum and ultrasonic signals on the surface of a sample through laser, preprocessing the signals, inputting the preprocessed signals into a multi-modal deep learning model integrated with an LANet network for feature extraction and fusion, and realizing multi-dimensional detection by using the fused features; the analysis module is used for analyzing element components and chemical defects; a double-flow time sequence network is constructed, time domain characteristics of the ultrasonic signals are analyzed in parallel to evaluate physical defects, and frequency domain sound velocity information is analyzed to evaluate residual stress; and modeling the attenuation characteristics of the ultrasonic signal by using a deep learning model, and calculating an ultrasonic attenuation coefficient to obtain probability distribution of the grain size. According to the method, the two signals are fused, the detection accuracy is improved by utilizing the strong feature mining and nonlinear mapping capability of deep learning, and multi-dimensional comprehensive evaluation of the metal 3D printing component is realized.

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.

The invention discloses Ge-Sn-Se-S acousto-optic chalcogenide glass, the chemical composition formula of the Ge-Sn-Se-S acousto-optic chalcogenide glass is Ge20SnxSe80-x-ySy, x and y respectively represent molar fractions of Sn and S, x is equal to 5-12.5, y is equal to 0-25, and a basic network unit of a glass frame of the Ge-Sn-Se acousto-optic chalcogenide glass is of a stable tetrahedral structure with Ge or Sn as the center. The acousto-optic chalcogenide glass is large in composition regulation and control range, easy to form, non-toxic, environment-friendly, green and quaternary chalcogenide glass system, high in linearity and refractive index and high in acousto-optic performance, the acousto-optic quality factor M2 under the wavelength of 1550 nm is 211.8 * 10 <-18 > s < 3 > / g to 348.9 * 10 <-18 > s < 3 > / g, the ultrasonic attenuation alpha under the ultrasonic frequency of 10 MHz is 0.72 dB / cm to 4.89 dB / cm, the laser damage threshold value is 2.94 J / cm < 2 > to 15.54 J / cm < 2 >, and the acousto-optic chalcogenide glass can be used for preparing the acousto-optic chalcogenide glass. The material has the potential of being applied to acousto-optic devices for high-power laser modulation, and can be widely applied to the acousto-optic field as an acousto-optic medium.

The invention discloses a switch cabinet partial discharge accurate positioning detection method based on a single sensor, and belongs to the technical field of power equipment partial discharge detection. Comprising the following steps: arranging a single ultrasonic sensor at the central position of the bottom surface of the switch cabinet according to the structural characteristics of the switch cabinet and the propagation characteristics of discharge signals so as to cover the monitoring range of the whole switch cabinet; collecting refraction and reflection data of ultrasonic waves in a transmission process in the switch cabinet, and establishing an ultrasonic attenuation model after normalization processing; in the ultrasonic signal propagation process, according to the ultrasonic attenuation condition, typical signal grade ranges of different switch cabinet areas are calibrated in advance through experiments, and a position database is formed; and the partial discharge position is positioned through two-parameter cooperation of the signal amplitude and the equivalent propagation distance y. According to the detection method, the limitation that multiple sensors need to work cooperatively in the prior art is broken through, the system structure is simplified, the cost is reduced, and meanwhile the operation convenience is improved.

A drug applicator (202) for ultrasound-enhanced delivery of at least one drug to a target site in an intraocular space (100), the system comprising a signal generating unit (300) operatively connected to an ultrasound transducer (202), wherein the drug applicator includes at least one space (800) for holding the drug, made of a low-ultrasound-attenuation material, configured to provide low-ultrasound-loss coupling between the system and the sclera, and configured to be mechanically coupled to the system and further configured to be coupled to the ultrasound transducer with low-ultrasound-loss. The signal generating unit and / or the ultrasound transducer are configured to emit an ultrasound pattern in at least one application cycle, the application cycle comprising at least one ultrasound emission event having a duration TA and a waiting period having a duration TW.

The invention relates to the technical field of cavitation monitoring, in particular to a tidal current energy water turbine cavitation predicting and monitoring method which comprises the steps that S1, multi-sensor data of a tidal current energy water turbine are collected, and the multi-sensor data comprise vibration signals, ultrasonic signals and pressure signals; s2, performing frequency domain analysis on the vibration signal, and extracting an energy value of a high frequency band as a vibration characteristic value; s3, performing transmission attenuation analysis on the ultrasonic signal, and calculating an ultrasonic attenuation rate as an ultrasonic characteristic value; s4, performing frequency domain analysis on the pressure signal, and extracting a pressure pulsation amplitude at a blade passing frequency as a pressure characteristic value; s5, based on the vibration characteristic value, the ultrasonic characteristic value and the pressure characteristic value, the current cavitation state is determined through a cavitation state judgment rule; and S6, predicting the evolution trend of the cavitation state, and estimating the residual safe operation time of the water turbine under the current working condition. The cavitation recognition result is converted into a quantitative life index, and the method has engineering application value and safety guarantee capability.

The invention provides an ultrasonic particle size detection system for coal slurry. The ultrasonic particle size detection system comprises a fixed frame; a coal slurry container; a stirring device; a degassing device; a particle size detection device; a signal generator and an oscilloscope. The invention provides a coal slurry ultrasonic particle size detection method. The coal slurry ultrasonic particle size detection method comprises the following steps: carrying out ultrasonic particle size detection on clear water to obtain a clear water attenuation amplitude; performing ultrasonic particle size detection on the coal slurry subjected to degassing treatment to obtain a coal slurry attenuation amplitude; calculating a coal slurry ultrasonic attenuation coefficient according to the clear water attenuation amplitude and the coal slurry attenuation amplitude; and performing inversion on the coal slurry ultrasonic attenuation coefficient by utilizing Monte Carlo simulation prediction and a particle swarm optimization method to obtain the coal slurry ultrasonic particle size distribution. According to the invention, coal slurry degassing and granularity detection are systematically realized, and the problems of difficulty in online detection of coal slurry granularity and bubble interference are fundamentally solved.

The present invention relates to the technical field of cleaning equipment, and specifically to a pipe processing and cleaning equipment, comprising an ultrasonic cleaning tank and a feeding traction machine, wherein the feeding traction machine is arranged on one side of the ultrasonic cleaning tank, and a long tube assembly is arranged on the ultrasonic cleaning tank, and the long tube assembly is used to improve the cleaning effect of the long pipe. The ultrasonic cleaning tank is provided with a short tube assembly. The pipe processing and cleaning equipment, through the cooperation between the long tube assembly and the short tube assembly, can fully clean the inside and outside of the long pipe when cleaning the long pipe, avoiding ultrasonic attenuation at the inner wall and affecting the cleaning effect. When cleaning the short pipe, the eccentric wheel on the surface of the eccentric roller can continuously lift and drop the short pipe, so that the position and direction of the short pipe can be changed, and the contact position between the short pipes and the short pipes and between the short pipes and the cleaning frame can be reduced and replaced, so that the short pipe can be fully cleaned and the cleaning effect is improved.

An ultrasound probe according to an embodiment includes a transducer part, a contact part, and an acoustic transmission layer. The transducer part has plural transducers that transmit and receive ultrasound. The contact part comes into contact with a subject. The acoustic transmission layer is arranged between the transducer part and the contact part and is formed of a material low in ultrasonic attenuation rate. Furthermore, the acoustic transmission layer has a thickness in a range of 2.3 mm to 4.7 mm and is formed using a material having an acoustic impedance of 1.4 MRayl or more and 1.6 MRayl or less.

The present disclosure provides systems and methods for ultrasound enhanced delivery of drugs. Specifically, a drug applicator (202) is provided for a system for ultrasound enhanced delivery of at least one drug to a target site in an intraocular space (100), the system comprising a signal generating unit (300) operably connected to an ultrasound transducer (202), wherein the drug applicator comprises at least one space (800) holding a drug, prepared from a low ultrasound attenuation material, configured to provide low ultrasound loss coupling of the system with the sclera, and configured to be mechanically coupled to the system and further configured to be coupled with low ultrasound loss to the ultrasound transducer. The signal generating unit and / or the ultrasound transducer are / is configured to emit ultrasound waveforms in at least one application cycle comprising at least one ultrasound emission event having a duration TA and a waiting period having a duration TW.

The invention discloses a concrete ultrasonic propagation characteristic modeling method and system, and relates to the technical field of ultrasonic non-destructive testing, and the method comprises the steps: obtaining the rheological behavior data of unsolidified cement slurry, building a concrete slurry fractional order viscoelastic constitutive model by adopting a Caputo type fractional order derivative, and obtaining a complex modulus; constructing a frequency domain wave equation by using the complex modulus, and calculating ultrasonic attenuation coefficients under different frequencies; dividing the concrete medium into thin layers along the propagation direction, and setting the thickness and characteristic impedance of each layer; a Waterman-Truell model is used to calculate a corrected complex wave number, and a structure factor is combined to correct scattering space correlation; calculating the total attenuation value of the attenuation coefficient of each thin layer, and establishing a propagation path total attenuation model. According to the method, the frequency response consistency is enhanced, the modeling precision of the heterogeneity and the multi-scale scattering characteristic of the concrete is improved, and the method has higher simulation accuracy and physical interpretation.

The invention relates to an opto-acoustic-ultrasonic multi-mode bone metabolism and senescence noninvasive detection method and device, and the method comprises the following steps: respectively collecting an ultrasonic signal and a multi-wavelength opto-acoustic signal in a detection period; calculating the ultrasonic sound velocity and the broadband ultrasonic attenuation coefficient of the to-be-detected bone based on the ultrasonic signal, comparing the ultrasonic sound velocity and the broadband ultrasonic attenuation coefficient with the data of the healthy bone, and preliminarily judging the health degree of bone metabolism; based on the ultrasonic sound velocity and the broadband ultrasonic attenuation coefficient of the to-be-detected bone, performing ultrasonic attenuation compensation on a bone tissue part in the photoacoustic signal; fitting the opto-acoustic signal subjected to ultrasonic attenuation compensation corresponding to each wavelength into a transmission equation of a macroscopic homogeneous medium, calculating to obtain a relative light absorption coefficient of each wavelength, and mapping the relative light absorption coefficient and the corresponding wavelength to obtain a relative light absorption spectrum of the to-be-detected skeleton; and performing linear fitting on the relative light absorption spectrum and the main component spectrum in the skeleton, decoupling related photoacoustic parameters of the chemical component content, and further judging the skeleton metabolism and aging degree. Compared with the prior art, the method has the advantages of being low in detection complexity, non-invasive, non-radiative, capable of comprehensively obtaining physical microstructures and biochemical information related to bone metabolism and aging and the like.

The present invention relates to a calibration method for an ultrasonic flaw detector calibration device. The method comprises obtaining and emitting an ultrasonic wave having a theoretical frequency matching that of a material to be detected, obtaining the actual propagation path of the ultrasonic wave and performing real-time dynamic correction, generating calibration parameters for a frequency-delay compensation coefficient, compensating the emitted ultrasonic wave based on the calibration parameters, and collecting a time-baseline signal after the compensated ultrasonic wave enters the material to be detected. The signal is then input into a trained deviation calculation model to calculate the time axis scale deviation, adjusting the time-baseline linearity based on the time axis scale deviation, generating a stepped ultrasonic attenuation signal, and collecting the amplitude value of the flaw detector echo signal. The amplitude value of the echo signal is compared with a preset amplitude threshold to obtain a dynamic difference between the two, and adjusting the attenuation amount in real time based on the dynamic difference. The method solves the problems of insufficient calibration efficiency and consistency, poor dynamic parameter adaptability, limited sensitivity calibration accuracy, and the ability to simulate complex working conditions in the prior art.

The invention discloses a double-layer structure hydrogel coupling gasket for stereo ultrasonic imaging and preparation and application thereof.The double-layer structure hydrogel coupling gasket comprises bottom layer hydrogel and upper layer hydrogel which are complementary in function, carboxymethyl cellulose and polyvinyl alcohol serve as core raw materials of the bottom layer, polyethylene glycol, glycerin and deionized water are matched, and the bottom layer can be tightly attached to the skin and fill body surface gullies; the upper layer takes high-content polyvinyl alcohol and carrageenan as core raw materials, and polyethylene glycol, glycerol and deionized water are used as auxiliary materials. The two-layer structure is integrally formed through an electron beam irradiation crosslinking process, a chemical crosslinking agent is not needed, the biocompatibility of the product is excellent, the ultrasonic attenuation coefficient is lower than 0.1 dB / cmMHz, and the high-fidelity requirement of a three-dimensional ultrasonic image on sound energy conduction can be accurately met. The problems that an existing composite material is insufficient in fitting performance, distorted in signal and blocked in operation in three-dimensional ultrasonic imaging are solved, the preparation process is controllable, and the composite material is suitable for industrial production and can be widely applied to various high-precision three-dimensional ultrasonic inspection scenes.

The application provides an ultrasonic attenuation compensation method and device and electronic equipment, for each point of interest in an ultrasonic image, a sound channel is determined according to a plurality of ultrasonic transmitting elements arranged on an ultrasonic probe; for each sound channel, target data of each pixel point on the sound channel is obtained from the ultrasonic image; and according to the target data, an ultrasonic attenuation value for the point of interest is calculated to compensate ultrasonic energy emitted to the point of interest. According to the method, the sound channel is determined according to each point of interest in the ultrasonic image in combination with the ultrasonic transmitting elements, and then the ultrasonic attenuation value for the point of interest is determined according to the target data such as the gray value and TGC value of each pixel point on the sound channel. Since the target data of different pixel points can reflect the heterogeneity of the acoustic impedance of different individuals, the accuracy of the obtained ultrasonic attenuation value can be improved, and the accuracy of the compensation of the ultrasonic energy is improved.

The invention relates to the technical field of conveying detection, in particular to an evaluation method and device for ultrasonic attenuation detection configuration of a coal conveying belt, and the method comprises the steps: obtaining the operation speed of a target coal conveying belt of a to-be-detected engineering site during in-service operation; inputting the running speed into a pre-constructed belt ultrasonic attenuation data model to output a target ultrasonic attenuation value of the target coal conveying belt; based on the target ultrasonic attenuation value, the ultrasonic attenuation detection configuration of the target coal conveying belt is evaluated, so that at least one of the detection wheel distance, the detection wheel number and the ultrasonic detection channel number of the ultrasonic attenuation detection configuration of the target coal conveying belt is determined. Therefore, the problems that the optimal detection scheme cannot be determined in advance according to the actual state of the belt in the prior art, and convenience, high efficiency, economical efficiency and the like of safety detection of the coal conveying belt are reduced are solved.

The invention discloses a power transmission line broken strand monitoring method and device, and relates to the technical field of power transmission line broken strand monitoring. Monitoring data of a power transmission line are obtained through preset anti-vibration broken strand monitoring equipment, broken strand feature extraction is carried out on the monitoring data, and the corresponding amplitude attenuation rate, the corresponding signal-to-noise ratio and the corresponding vibration total energy are obtained; performing frequency spectrum distortion evaluation on the total vibration energy according to a preset reference vibration energy threshold value to obtain a corresponding frequency spectrum distortion coefficient, performing threshold value setting on the reference vibration energy threshold value and a preset reference ultrasonic attenuation threshold value based on a signal-to-noise ratio to obtain a corresponding vibration energy threshold value and a corresponding ultrasonic attenuation threshold value, according to the vibration energy threshold value, the frequency spectrum distortion coefficient, the ultrasonic attenuation threshold value, the amplitude attenuation rate and the vibration total energy, strand breakage detection is carried out, and a corresponding detection result is obtained. The problems that traditional power transmission line broken strand monitoring mostly depends on manual inspection, the efficiency is low, the cost is high, early warning and accurate diagnosis of hidden danger of broken strands are difficult to achieve, and the running reliability of a power transmission line is reduced are solved.

The application belongs to the technical field of ultrasonic imaging, and particularly relates to a method and device for calculating an ultrasonic attenuation coefficient based on an echo signal power spectrum. The method comprises: outputting an ultrasonic emission signal and obtaining a corresponding echo signal, and acquiring a power spectrum of the echo signal; taking a log logarithm of an echo signal power spectrum model to obtain a simplified power spectrum model; the simplified power spectrum model comprises a non-attenuation term and an attenuation term; and calculating an attenuation coefficient according to the power spectrum of the echo signal and the attenuation term in the simplified power spectrum model. The application estimates the attenuation coefficient based on spectrum analysis of the echo signal, so that efficient and convenient calculation is achieved.

The invention provides a carbon powder mixing process parameter regulation and control method and system, and belongs to the technical field of production line control. Firstly, a to-be-detected product is obtained from a product end of a carbon powder mixing production line, the to-be-detected product is placed on detection equipment, then, vibration of first unit time is applied to a detection cavity based on first vibration frequency, and a detection result is obtained; the method comprises the following steps: firstly, detecting a gravity direction of a carbon powder particle, acquiring a first ultrasonic attenuation rate based on an ultrasonic sensor, then overturning a detection cavity to enable the height direction of the detection cavity to be perpendicular to the gravity direction, acquiring a second ultrasonic attenuation rate based on the ultrasonic sensor, and acquiring a carbon powder particle distribution index based on the first ultrasonic attenuation rate and the second ultrasonic attenuation rate; and regulating and controlling the production line based on the carbon powder distribution index. According to the carbon powder mixing process parameter regulation and control method and system provided by the embodiment of the invention, the dispersity of carbon powder particles is evaluated by utilizing the ultrasonic attenuation difference under the gravity direction change, the detection speed is higher than that of an artificial microscope, meanwhile, a laser detector does not need to be adopted, and the production cost is saved.

The invention relates to the field of automatic detection of tea processing, and provides a tea withering detection method and system based on ultrasonic attenuation, and the method comprises the steps: synchronously collecting echo signals, position parameters and environment temperature, generating a stacking thickness field matrix through thermodynamic sound velocity compensation and cubic spline interpolation, and outputting porosity correction according to a rheological power law function; a transmission acoustic signal is collected by a time division multiplexing mechanism, a transmission amplitude field and a propagation time field are constructed through Hilbert transform and cross-correlation time delay estimation, average sound velocity distribution is constructed, and a physiological attenuation coefficient and a damage index are generated in combination with porosity correction; a composite feature vector is constructed, and the local water content and the cell wall breakage rate are solved through a space-time gradient coupling network; and generating a global regulation and control instruction in combination with the spatial weighted average moisture content and the accumulation thickness field matrix, and generating a fixed-point targeted raking instruction in combination with the abnormal displacement coordinates. According to the method, acoustic inversion and multi-dimensional closed-loop correction are fused, and digital perception and intelligent targeted regulation and control of the tea leaf withering process are constructed.

The invention relates to the technical field of semiconductor materials, and discloses a high-temperature-resistant liquid silicone adhesive for chip packaging and a synthesis process thereof, and the synthesis process comprises the following steps: S1, basic mixing of a component A, S2, intelligent dispersion of a heat-resistant filler of the component A, S3, catalyst addition of the component A, S4, preparation of a component B, and S5, packaging, mixing and curing linkage control. Through algorithm linkage of A component heat-resistant filler dispersion (S2) and packaging, mixing and curing (S5), the initial curing temperature of S5 is calculated according to the final ultrasonic attenuation coefficient alpha of S2, and the temperature rise amplitude (alpha is less than 3.8 and is increased by 8 DEG C when alpha is greater than or equal to 3.8) is dynamically adjusted according to the alpha value, and meanwhile, the S2 ensures that the filler is uniformly dispersed by virtue of an ultrasonic-stirring collaborative algorithm, so that the curing effect of the filler is improved. Finally, after the adhesive is aged at 250 DEG C, the adhesive strength retention rate reaches 82.1%-83.3%, and the long-term high-temperature requirement of a chip is met.

The application discloses a kind of based on ultrasonic wave attenuation characteristics pillar load quantitative inversion and safety diagnosis method, belong to rock engineering safety monitoring and nondestructive testing technical field.First, construct the rock sample with different fracture characteristics, carry out loading test under different load and obtain multi-band time domain signal, obtain the attenuation value under different load grade to construct the quantitative relationship model of different frequency band;Statistical pillar fracture characteristic parameters, obtain its attenuation value under each frequency band;Substitute into quantitative relationship model, carry out multi-band data fusion inversion, obtain the current equivalent load of pillar;Calculate safety factor, combined with the stability quantitative evaluation standard constructed, carry out quantitative diagnosis to target pillar stability.The application uses ultrasonic wave attenuation characteristics, improves diagnosis sensitivity and accuracy;Discard single frequency pulse, adopt sweep excitation technology can simultaneously identify the coupling mechanism of load action and fracture characteristics;Overcome the limitation of single factor, realize quantitative judgment.

A method for compensating for ultrasonic attenuation by the head and hair in a wearable ultrasound device, for controlled transcranial ultrasonic therapies that deliver into the brain deterministic ultrasound pressure and intensity, is provided. The method includes positioning a wearable ultrasonic device within degassed water, the device comprising a first ultrasonic transducer and a second ultrasonic transducer; obtaining a first signal amplitude from the device by emitting a first ultrasonic pulse from the first transducer and receiving the first pulse via the second transducer; positioning the device onto the head of a subject; obtaining a second signal amplitude from the device by emitting a second ultrasonic pulse from the first transducer and receiving the second pulse via the second transducer; and scaling an amplitude of the driving voltage of ultrasonic pulses delivered via the device based on a comparison of the first signal amplitude and the second signal amplitude.

The present invention relates to a resin composition for attenuating the sound of ultrasonic waves, the composition having excellent heat resistance and ultrasonic attenuation properties.

The invention discloses an ultrasonic metering module and an ultrasonic gas meter, and belongs to the technical field of gas metering, the ultrasonic metering module comprises a shell and a transducer, a metering flow channel extending in the first direction is arranged in the shell, and the shell comprises a first inner wall and a second inner wall which are oppositely arranged in the second direction. The energy converter comprises a first energy converter and a second energy converter, the first energy converter is arranged on one side of the first inner wall in the shell, and the second energy converter is arranged on one side of the second inner wall in the shell. The incidence angle of the transducer is A, the unit is degree, the width of the metering flow channel in the second direction is H, the unit is mm, and A =-1.23 * H2 + 44.7 * H-a; wherein a is greater than or equal to 370 and less than or equal to 374.5 According to the ultrasonic metering module provided by the invention, the effective sonic path distance of ultrasonic waves and the attenuation condition of the ultrasonic waves can be balanced while the overall size is reduced, the measurement sensitivity and stability of the ultrasonic metering module are ensured, and the measurement precision is improved.

A drug applicator for a system for ultrasound-enhanced delivery of at least one drug to a target site in a intraocular space, the system comprising a signal generating unit operationally connected to an ultrasound transducer, wherein the drug applicator comprises at least one space hold the drug, is made from a low ultrasound attenuation material, is configured to provide low ultrasound loss coupling of the system to the sclera, and is configured to be mechanically coupled to the system and further configured to be coupled to the ultrasound transducer with low ultrasound loss. The signal generating unit and / or the ultrasound transducer are configured to emit an ultrasound wave form in at least one application cycle, the application cycle comprising at least one ultrasound emitting event with a time duration TA and a waiting period with a time duration TW.

The application provides an ultrasonic and infrared thermal imaging integrated detection method and system sharing an excitation source, applies the shared excitation source to a to-be-detected object, synchronously collects multi-channel ultrasonic echo signals and infrared thermal imaging images, divides the to-be-detected object into multiple target regions, and calculates the frequency band ultrasonic attenuation coefficient and acoustic impedance of each region, and then obtains a densification value; after extracting a heat flow response feature map from the infrared image, according to the spatial gradient of the densification value and the heat flow response energy gathering area, the multi-modal data is adaptively partitioned to form multiple data analysis subsets. For each subset, a local joint dictionary is constructed according to the densification value and the heat flow feature; the ultrasonic and infrared features in the subset are jointly sparsely represented by using the dictionary to obtain a group of cross-modal fusion coefficients, based on the fusion coefficients and a defect recognition model, the defect information in the to-be-detected object is accurately determined, and a defect distribution map is generated.

The invention relates to the technical field of industrial process monitoring and intelligent control, and discloses an emulsified oil stability real-time monitoring and early warning method and system.The method comprises the steps that complex dielectric constant time sequence data and sound wave attenuation data are collected through a multi-band dielectric spectrum sensor array and an ultrasonic attenuation spectrum sensor respectively; in combination with temperature-pressure coupling sensing information, an interface double-electric-layer relaxation time and micro-droplet particle size distribution function is extracted; and inputting the features into a pre-trained neural network model, outputting a stability state index, and triggering a graded early warning and control instruction according to a threshold value. The system is composed of a multi-modal sensing unit, a feature extraction unit, a stability discrimination unit and an early warning decision unit. Through multi-physical field fusion perception and mechanism driven modeling, non-intrusive and high-sensitivity online monitoring of the microcosmic phase change of the emulsified oil is realized, and the early warning accuracy and industrial applicability are remarkably improved.