13 results about "Phased array transducer" patented technology

This invention discloses a wearable ultrasound delivery device for treating otitis media, comprising a wearable main body with a flexible structure adapted to the shape of the patient's ear canal, and a through-hole central channel; an ultrasound drug delivery device, detachably disposed within the central channel, comprising a drug carrier for carrying the therapeutic drug to be delivered, an ultrasound transducer assembly for providing an ultrasound-guided drug delivery mode, and a handheld controller for adjusting the millimeter-level displacement of the drug carrier into the middle ear cavity; wherein, the ultrasound transducer assembly comprises a flexible substrate and multiple piezoelectric transducer units integrated on the flexible substrate, the multiple piezoelectric transducer units constituting a phased array transducer array. This device solves the technical problems of inaccurate drug delivery, low drug delivery efficiency, inability to adapt to the ear canal structure, and complex operation in the prior art.

The invention discloses a double-frequency phased array composite pulse histotripsy system and a double-frequency phased array composite pulse histotripsy method. Comprising a double-frequency phased array transducer, a driving control module, a focus control module and a real-time monitoring module, wherein the double-frequency phased array transducer is a double-frequency hundreds of array element phased array transducer or a double-frequency split array transducer; the double frequency multiplication phased array transducer comprises a fundamental frequency array element group and a frequency multiplication array element group, the driving control module is used for outputting driving signals with corresponding frequencies to two groups of array elements, the focus control module is used for regulating and controlling the positions and the number of focuses, and the real-time monitoring module is used for tracking the effect; the double-frequency phased array composite pulse histotripsy system adopts a four-stage composite pulse time sequence to cooperatively control the working states of a fundamental frequency array element group and a frequency multiplication array element group, and is realized in combination with a multi-focus control strategy; according to the method, the defect of fogging zone front cavitation shielding possibly caused by double-frequency millisecond long-pulse tissue damage and the defect that instant B-ultrasonic monitoring is affected by slow bubble dissipation after treatment are overcome.

The invention discloses an ultrasonic guided wave automatic detection system and method for a large ocean engineering structure, and the method comprises the following steps: planning and preparing before detection; system laying and surface self-adaption are carried out; performing automatic scanning and FMC data acquisition; data processing, frequency dispersion physical model establishment and DC-TFM imaging; and carrying out image splicing, visualization and defect evaluation. A modular robot scanning platform, a guided wave phased array transducer in a specific mode and a frequency dispersion compensation full focusing (DC-TFM) algorithm are fused, wave field data are obtained through full matrix capture (FMC), frequency-dependent phase correction is carried out in a frequency domain to eliminate the frequency dispersion effect, and full-area dynamic focusing is achieved. According to the system, rapid, full-coverage and high-resolution C scanning imaging can be performed on a large structure, the small defect detection probability and the quantitative evaluation accuracy are improved, and the structural integrity and the operation safety are guaranteed.

The application discloses a kind of based on non-paraxial approximate multivariate Gaussian sound beam model ultrasonic phased array Rayleigh wave field calculation method, the method first solves single array element Rayleigh wave field by establishing non-paraxial approximate multivariate Gaussian sound beam model, then determines phased array transducer parameter to calculate phased array each array element coordinate and the delay required for phased array Rayleigh wave deflection and focusing each array element, finally to single array element Rayleigh wave field is delayed and is added to obtain phased array Rayleigh wave synthesis sound field.The method realizes the fast calculation of phased array Rayleigh wave field under the premise of guaranteeing accuracy, solves the problems, such as low efficiency of traditional Rayleigh wave field calculation method, deviation increases with off-axis distance, etc., has guiding significance to the optimization of ultrasonic testing process and the quantitative evaluation of defect.

The invention relates to the technical field of pipeline hot-melting joint defect detection, in particular to a phased array transduction detection device for pipeline hot-melting joint defects, which comprises a seat body with an adaptive surface on one side and an inclined surface on the other side, the adaptive surface is used for fitting with the outer wall of a pipeline, and the inclined surface is used for inclining relative to the cross section of the pipeline; and the phased array detection transducer is arranged on the inclined plane, so that the phased array detection transducer can incline towards the pipeline hot melting joint from one side of the pipeline hot melting joint. The invention further relates to a phased array transduction detection method for the pipeline hot melting joint defect, when a pipeline hot melting joint is detected, the phased array detection transducer obliquely faces the pipeline hot melting joint from one side, and the distance between a plurality of array elements of the curved surface array of the phased array detection transducer is adjusted for multi-position measurement. According to the scheme, defects in different positions and directions, especially defects perpendicular to a pipeline, can be detected, and the detection problem caused by sound attenuation and irregular convex edges in a conventional detection method is solved.

The invention provides an ultrasonic full-focus image stitching method based on normalized cross-correlation and a related device. The method comprises the following steps: S1, acquiring ultrasonic full-matrix data acquired by an ultrasonic phased array transducer at different positions of a sample to be detected, and performing full-focusing phase migration imaging according to the ultrasonic full-matrix data to obtain full-focusing phase migration images at different positions; and S2, splicing the full-focus phase shift images at different positions through a normalized cross-correlation template matching method to obtain a panoramic image. According to the method, the accuracy of low-resolution phase shift image splicing can be realized, and meanwhile, the imaging effect of the image edge region is optimized.

The invention provides an ultrasonic phased array internal detection system for a variable-diameter pipeline, and the system comprises a detector cabin which is of a cylindrical structure; the annular ultrasonic ranging transducer array is arranged on the outer side of the detector cabin in a surrounding manner, and the annular ultrasonic ranging transducer array is configured to acquire real-time pipe diameter data in a to-be-detected pipeline; the annular ultrasonic phased array transducer is arranged on the outer side of the detector cabin in a surrounding manner, and the annular ultrasonic phased array transducer is configured to perform corrosion defect detection on the to-be-detected pipeline according to the real-time pipe diameter data; the corrosion defect detection comprises the step of performing corrosion defect detection by focusing ultrasonic waves to enter the detection pipeline. According to the system, the problems that an existing detector is too large in structural size and insufficient in self-adaptive focusing capacity when facing pipeline reducing are solved.

The invention discloses a cable icing detection system and method and a preparation method of an ultrasonic phased array transducer. The detection system comprises a power supply module, a signal acquisition module, a signal processing module and a wireless transmission module. Wherein the signal acquisition module adopts a flexible detection device and is arranged at a detection point position of a cable, and the detection device is provided with an ultrasonic phased array transducer formed by an array formed by a plurality of independent flexible transducers; a power supply module and a wireless transmission module are arranged on the detection system; signals are sent to the signal processing module through the wireless transmission module, and the signal processing module analyzes the collected signals to obtain cable icing condition data. On the basis of an ultrasonic detection method, the ultrasonic transducers are arranged and fixed on the outer surface of a real cable in an array mode, the icing state of the cable can be directly detected while the shape is maintained, the method is not affected by weather, and real-time accurate measurement can be achieved.

The application discloses a kind of based on phased array's branch pipe seat weld defect detection device design method and device, method includes establishing EMAT phased array finite element model, based on EMAT phased array finite element model to transducer sound field is carried out simulation experiment, obtain multiple sound field simulation results, based on multiple sound field simulation results to phased array synthesis sound beam quality is analyzed, and the optimal structure parameter of phased array is determined, based on optimal structure parameter to weld defect detection device is optimized design.The application utilizes finite element method to transducer sound field is carried out simulation experiment analysis, and the optimal structure parameter of phased array is determined, and the detection capability of weld defect is improved using optimal structure parameter design EMAT phased array transducer.The branch pipe seat fillet weld detection fixture device designed by the application has high modularity and flexibility, and the device can adapt to the detection needs of various special-shaped geometric structure branch pipes and can be applied to the detection of branch pipe seat weld defects with different diameters and different welding processes.

The invention provides an imaging method and system for patch ultrasound, and the method comprises the steps: a delay calculation step: calculating the transmission delay of each array element of a phased array transducer in advance according to the type of a target wave beam and a deflection parameter, and providing a time sequence reference for wave beam transmission; a wave beam transmitting and receiving step: transmitting wave beams in a multi-channel excitation mode through phased array transducer array elements based on the transmitting delay, and receiving echo signals through all the array elements; a data acquisition step of determining total transceiving times and acquiring echo data according to the deflection parameters in the beam transceiving step; and an imaging generation step: performing signal processing by using the echo data to generate a dynamic monitoring image of the target area. According to the method, no view blind area exists in the whole imaging view, local details can be clearly presented, the transverse or axial resolution and contrast ratio are superior to those of a single beam imaging scheme, and the requirements for monitoring superficial tissue fine structures and monitoring blood flow change conditions are met.

The present application provides a kind of outflow facility of aqueous humor non-invasive monitoring scleral mirror device, monitoring method and system, it is related to ophthalmic medical monitoring equipment technical field, solve the problems of strong invasiveness, cannot continuous monitoring, insufficient precision and poor data synchronism of the existing technology in aqueous humor outflow coefficient measurement method;Wherein the scleral mirror device includes: scleral mirror, scleral mirror includes center area, edge landing area and the transition zone connecting center area and edge landing area, edge landing area is used to contact the sclera of user and provide support to transition zone and center area;Phased array transducer matrix, phased array transducer matrix includes multiple ring-shaped distribution in transition zone transducer;Dynamic deflection control module, dynamic deflection control module is set in transition zone, and is electrically connected with each transducer, to control the excitation time delay of each transducer;Intraocular pressure monitoring module, intraocular pressure monitoring module is set in center area;Signal processing module, signal processing module is set in transition zone.

A phased array transducer for cardiac ultrasound diagnostic imaging includes: a transducer head; a housing unit; and cables. The transducer head has a shape adapted for coupling with the human chest. A method for acquiring cardiac ultrasound images behind the ribs of a human includes: providing a phased array transducer including a transducer head shaped for coupling with the human chest; and applying a beamforming method to generate an ultrasound image.

The invention aims to provide a true triaxial gas-containing coal impact test and ultrasonic imaging monitoring device and method, and belongs to the technical field of rock mechanics tests, the device comprises a test cavity, a three-way loading system, a Hopkinson pressure bar system, a gas supply and vacuum-pumping system and an ultrasonic phased array monitoring system. A sealing chamber enclosed by six loading pressure blocks is arranged in the test cavity, and a phased array transducer array is embedded in the Y-direction sealing end cover assembly and is connected with an external acquisition instrument through a sealing lead. The method comprises the steps of applying true triaxial static load meeting a specific relation, performing gas adsorption saturation, performing impact loading, and synchronously performing ultrasonic imaging and gas desorption monitoring. According to the invention, the embedded phased array technology and the synthetic aperture focusing algorithm are utilized to realize the real-time three-dimensional imaging of the gas-containing coal impact damage evolution process and the quantitative characterization of the gas migration law in the complex multi-field coupling environment.