190 results about "Ultrasonic ndt" patented technology

The invention discloses a method for jointly detecting corrosion defects of a pressure pipeline by utilizing multiple guided wave modes, relates to an ultrasonic non-destructive testing technology, and is used for solving the problem that the accuracy is relatively low when a single guided wave mode is used for detecting. The method for detecting the corrosion defect of the pressure pipeline comprises the following steps: calculating ultrasonic guided wave dispersion data of the pressure pipeline, and determining the center frequency of a transducer according to the dispersion data; the method comprises the following steps: arranging ultrasonic transducer annular arrays on two sides of a to-be-detected pressure pipeline, and acquiring ultrasonic guided wave data detected by the pressure pipeline in an L (0, 1) mode and a T (0, 2) mode; preprocessing the array waveform data to obtain detection data which can be used for guided wave imaging; according to the L (0, 1) mode guided wave data, a full waveform inversion method is adopted to invert the wall thickness of the pipeline corrosion defect; judging whether the pipeline defect exceeds the detection depth range of the T (0, 2) mode, and if the pipeline defect exceeds the detection depth range, ending; and if not, inverting the wall thickness of the pipeline corrosion defect by adopting a full-waveform inversion method according to the T (0, 2) mode guided wave data.

The invention provides a storage battery health state assessment method fusing ultrasonic data and hybrid machine learning, and belongs to the technical field of storage battery health state assessment. The method focuses on performance comparison of an ANN model and a GWO-ANN model in storage battery SOH regression prediction, and finds that the GWO-ANN model accurately adjusts and optimizes ANN parameters by means of a grey wolf optimization algorithm, so that the storage battery health state assessment accuracy is improved. Compared with the prior art, the method has the advantages that higher prediction precision and generalization ability are shown, the R2 value is close to perfect, the error is extremely low, and the ANN model is remarkably surpassed, the HHT-GWO-ANN model is innovatively introduced, the model integrates the advantages of HHT and GWO, the calculation process is accelerated, the robustness and prediction precision of the model are enhanced, efficient and stable model construction is achieved, and the method is suitable for large-scale popularization and application. And the test performance of the method is consistent with that of the training stage, so that the practical potential of the method in storage battery SOH nondestructive testing is verified. The ultrasonic nondestructive testing method proposed by the invention shows unique advantages in SOH recognition of the storage battery, and overcomes the limitation of a traditional method.

The invention discloses an ultrasonic characteristic simulation device for interface aging of a cable intermediate joint and a detection and evaluation method. The ultrasonic characteristic simulation device comprises a mechanical pressurization device, a pressure sensor and an ultrasonic probe, aging of a cable intermediate joint interface material and changes of interface contact pressure along with aging can be simulated at the same time, and the interface insulation aging state of the cable intermediate joint can be reproduced; the detection and evaluation method comprehensively considers the reflection coefficient, sound velocity and nonlinear coefficient change of an ultrasonic signal, establishes a cable intermediate joint insulation / rubber interface aging evaluation model, and can more comprehensively reflect the change of interface pressure, roughness and interface material properties; the aging evaluation coefficient closely related to the interface contact state is adopted, so that the reliability of interface insulation can be evaluated more directly. According to the invention, ultrasonic nondestructive testing of insulation / rubber interface aging is realized.

The invention relates to the technical field of ultrasonic non-destructive testing, and discloses an intelligent ultrasonic non-destructive testing device which comprises a body mechanism, the body mechanism comprises an operation table, a displayer, an ultrasonic testing instrument and a mounting frame are fixedly mounted on the upper surface of the operation table, and an electric sliding rail is fixedly mounted on the inner top wall of the mounting frame; a mechanical arm is fixedly installed on the bottom face of the electric sliding rail, a probe is fixedly installed on the bottom face of the mechanical arm, and a processing mechanism is arranged above the operation table. The processing mechanism comprises a smearing unit, and the smearing unit is located below the mechanical arm and used for evenly smearing the coupling agent on the to-be-detected object according to the detection speed. According to the intelligent ultrasonic nondestructive testing device, the output efficiency of a coupling agent is automatically adjusted according to the detection rate, so that the output coupling agent is uniformly smeared on the surface of an object to be detected, the phenomenon of poor coupling between a probe and the object to be detected is avoided, and the supply efficiency of the coupling agent is improved.

The invention provides a nuclear power plant reactor pressure vessel connecting pipe inner fillet detection device which comprises a connecting pipe, a driving part, a universal adjusting probe frame and a connecting fork, the front end of the connecting pipe and the connecting fork are connected to form a Y-shaped symmetrical structure, the driving part is installed on the outer side of the connecting fork, and the universal adjusting probe frame is installed on the driving part. The driving piece is connected with the universal adjusting probe frame to drive the universal adjusting probe frame to be attached to the inner fillet area of the connecting pipe. The device for detecting the inner fillet of the connecting pipe of the reactor pressure vessel of the nuclear power plant, provided by the invention, is better suitable for ultrasonic nondestructive detection of the inner fillet of the connecting pipe of the pressure vessel, and the accuracy and the reliability of detection are improved.

The invention discloses a distance-adjustable stress detection device and method for monitoring the state of coupling liquid, and belongs to the field of ultrasonic nondestructive testing. The device comprises a first wedge block, a second wedge block, a linkage module, a liquid supplementing pipeline and a liquid pump. A linkage module capable of changing the horizontal distance between the first wedge block and the second wedge block is installed between the first wedge block and the second wedge block. The bottom surfaces of the first wedge block and the second wedge block are sunken inwards to form a coupling agent groove; the liquid pump is communicated with the liquid supplementing inlet through a liquid supplementing pipeline, so that a coupling agent can enter the coupling agent groove through the liquid supplementing outlet to fill the lower surface of the wedge block and the surface of the detected workpiece; a transmitting probe and a receiving probe are respectively arranged at the tops of the first wedge block and the second wedge block in a mirror symmetry manner; and the receiving probe is connected with an upper computer through a data acquisition module to feed back and adjust the liquid pump. The problem that a traditional wedge block cannot optimize the sound wave propagation path in dynamic detection is solved, matching of the sound wave path and the actual detection condition is achieved, and the detection precision and stability are further improved.

The invention aims to provide an ultrasonic transducer capable of continuously and stably working in a high-temperature and high-pressure extreme environment, and belongs to the technical field of ultrasonic nondestructive testing, the ultrasonic transducer comprises a packaging matching layer, a piezoelectric layer, an electrode layer and a backing layer, the packaging matching layer can have the effects of high temperature resistance, high pressure resistance and heat dissipation so as to match acoustic impedance, and the piezoelectric layer is arranged on the backing layer. Therefore, the acoustic performance of the transducer is improved. The piezoelectric layer can keep excellent piezoelectric performance in a high-temperature environment. The electrode layer and the back lining layer can achieve a good heat dissipation effect, and the service life is prolonged. The method has a wide application prospect in the field of ultrasonic nondestructive testing in an extreme environment.

The invention discloses a high-temperature pipeline magnetostrictive guided wave sensor and a monitoring method, and relates to the field of ultrasonic nondestructive testing. According to the sensor, a wrinkled iron-cobalt alloy belt is used as a sensitive element, and the sensor is in dry coupling contact with a to-be-detected pipeline; the high-temperature-resistant static magnetic field coil is wound on the outer side of the aluminum pre-tightening ring in a solenoid mode, and a bias pulse excitation mode is adopted. Alternately winding the bottom end of the wrinkle structure of the wrinkle-type ferrocobalt alloy belt and the back surface of the belt material, controlling the wrinkle-type ferrocobalt alloy belt to excite a guided wave signal in a pulse section, and receiving the guided wave signal in a bias section; the dynamic magnetic field and the static magnetic field generated by the two groups of coils are perpendicular in direction, and torsional mode guided waves are generated in the high-temperature pipeline based on the reverse Weidmann effect. The sensor is easy to install and stable in performance, the whole structure is resistant to high temperature for a long time, and the engineering problem of high-temperature failure is solved. The method provided by the invention comprises the steps of optimizing pre-tightening force, pulse voltage and bias current parameters, so that the transduction efficiency is improved, and the capability of detecting new defects of the pipeline in high-temperature and variable-temperature states is enhanced.

The invention provides an aero-engine main bearing micro-defect nonlinear phased array ultrasonic nondestructive testing method and device, and relates to the technical field of ultrasonic nondestructive testing, the method comprises the following steps: according to the sound beam focal spot diameter of the emission aperture of a phased array excitation probe, carrying out grid division on a target detection area; according to a focusing rule of a phased array emission aperture, focusing scanning of each grid is completed in sequence, and ultrasonic signals of each grid are collected through a phased array receiving probe in the scanning process; carrying out noise reduction processing on the ultrasonic signal by utilizing a self-adaptive bilateral filtering algorithm; a signal blind source separation algorithm is adopted to decouple the processing signals, nonlinear harmonic signals generated by the microdefects are separated, and positioning and quantitative analysis are conducted on the microdefects; and the two phased array probes scan along the contour of the cross section of the bearing ring to complete the full-coverage detection of each cross section of the bearing ring. According to the invention, the microdefect of the aircraft engine bearing can be subjected to nondestructive detection.

According to the ultrasonic non-destructive testing device for the aviation composite material part, a tester can laterally lock the side edge of a sample through the positioning mechanism so as to meet the requirement for detecting a special-shaped or thicker sample, and meanwhile, the bottom of the sample can be locked in a negative pressure adsorption mode by reversely driving the positioning mechanism so as to meet the requirement for detecting the special-shaped or thicker sample. According to the sample table for the ultrasonic scanning microscope, the requirement that the sample is flat or is prone to being damaged due to extrusion is met, and after locking is completed, the detection face of the sample is in an unshielded state, so that the ultrasonic scanning microscope can comprehensively detect the sample, and the problems that an existing sample table for the ultrasonic scanning microscope shields the sample, and ultrasonic nondestructive testing errors of the sample are increased are effectively solved.

The present invention relates to a dual-probe device for transverse and longitudinal wave bolt stress detection and a detection method thereof, and belongs to the technical field of ultrasonic non-destructive testing equipment. The invention solves the problem that it is difficult to ensure the positioning accuracy of the dual probes and the constant pressure between the dual probes and the bolts to be tested during the actual use of transverse and longitudinal wave dual-probe stress detection. The invention comprises a housing, a longitudinal wave probe preload adjustment part, a transverse wave probe preload adjustment part, a first spring, a second spring, a longitudinal wave probe, a transverse wave probe, a base and a magnet. The longitudinal wave probe preload adjustment part, a first spring and a longitudinal wave probe are arranged in sequence in the housing. The transverse wave probe preload adjustment part, a second spring and a transverse wave probe are also arranged in sequence in the housing. The housing is detachably connected to the base, and the detection ends of the longitudinal wave probe and the transverse wave probe extend into the base. The invention can well fix the position of the transverse and longitudinal wave dual probes to ensure the stress measurement accuracy; the invention is easy to use and adjust, and can maintain a constant pressure between the bolts to be tested.

The invention discloses a high-temperature-resistant coating type magnetostrictive ultrasonic transducer, and belongs to the field of ultrasonic nondestructive testing. The transducer is composed of a high-temperature-resistant ceramic coil and a high-temperature-resistant magnetostrictive coating prepared on the basis of Fe3O4 / AlNiCo composite powder. The method comprises the following steps: firstly, spraying Fe3O4 / AlNiCo composite powder to the surface of a to-be-detected workpiece to form a magnetostrictive coating tightly combined with the surface of the workpiece as a sensing unit for exciting and receiving ultrasonic waves; then carrying out magnetization treatment on the coating by utilizing a magnetization device, and establishing a stable static bias magnetic field; removing the magnetizing device, and applying a pulse current signal in the ceramic coil to generate a dynamic alternating magnetic field; finally, based on the magnetostrictive effect, ultrasonic waves are excited and received in the coating, and detection of defects in the to-be-detected workpiece is achieved. The transducer has the advantages of high temperature resistance and high signal-to-noise ratio, and is suitable for rapid spot check detection and long-term online monitoring of structures such as high-temperature pipelines and high-temperature pressure vessels.

The invention relates to a manufacturing method of a high-heat-dissipation circuit board. The manufacturing method comprises the following steps of manufacturing a first multi-layer board and a second multi-layer board; anti-etching photosensitive dry films are attached to the single faces of the first multilayer board and the second multilayer board; etching the exposed copper foil layers of the first multilayer board and the second multilayer board; semi-grooves are machined in the exposed film layers of the first multilayer board and the second multilayer board; the capillary copper pipe is subjected to blocking and browning treatment, and semi-cured resin coating is carried out; the first multi-layer plate and the second multi-layer plate are stacked, and the capillary copper pipe is horizontally arranged in the containing groove; riveting the first multi-layer plate and the second multi-layer plate which are pre-embedded with the capillary copper pipes by using a rivet through electromagnetic hot melting; laminating the riveted first and second multi-layer boards, the outer layer prepreg and the outer copper foil layer by using a vacuum laminating machine to form a semi-finished board; performing ultrasonic nondestructive testing on the semi-finished plate; and post-processing the semi-finished board to obtain the circuit board. According to the manufacturing method, the circuit board with the horizontally-embedded capillary copper pipe is obtained through the processes of film drying, single-face etching, groove milling and the like, and the heat dissipating capacity is increased.

The invention provides a piezoelectric transducer and method for directionally exciting and receiving non-dispersion torsional guided waves, and relates to the technical field of ultrasonic nondestructive testing, the piezoelectric transducer comprises a first circumferential array, and the first circumferential array is composed of a plurality of first piezoelectric units and a plurality of first time delay units; and the second circumferential array is composed of a plurality of second piezoelectric units and a plurality of second time delay units. The piezoelectric transducer capable of directionally exciting and receiving the non-dispersion torsional guided wave is constructed through the thickness shearing type piezoelectric unit and the height difference time delay unit, no matter unidirectional excitation or unidirectional receiving is needed, an additional circuit or equipment is not needed to provide time delay, and the complexity and cost of the whole structure are reduced. In addition, the time delay unit is adopted to replace a piezoelectric unit to be in curved surface combination with the pipeline, the problem that the piezoelectric unit is not matched with the detected pipeline due to too small flexibility can be avoided, then the fitting degree is improved, signal transmission is guaranteed, and detection is more efficient and accurate.

The invention relates to a nondestructive testing ultrasonic imaging method based on a spatial frequency spectrum coherence coefficient and a coherence energy coefficient, and belongs to the technical field of ultrasonic nondestructive testing. The technical problem that high resolution and high contrast cannot be both considered in a traditional delay superposition algorithm is solved. According to the technical scheme, the method comprises the steps of preprocessing ultrasonic echo signals; extracting a spatial spectrum coherence coefficient through discrete Fourier transform; fusing symbol coherence and energy distribution characteristics to generate a coherent energy coefficient; weighting a delay superposition result by using double coefficients; and outputting an optimized scanning line signal through adaptive FIR band-pass filtering. The method has the technical effects that the traditional balancing bottleneck of imaging resolution and contrast is broken through, interference artifacts in a metal homogeneous medium are remarkably inhibited, the micro-defect identification capability is enhanced, and the method is adaptive to diversified industrial detection scenes.

The present invention discloses a fiber optic eddy current ultrasonic composite nondestructive testing instrument and a testing method, which relate to the field of nondestructive testing technology, including a frame, an XY two-dimensional motion module, a Z-direction linear motion module, a rotation drive module and a fiber optic eddy current and ultrasonic nondestructive testing module, wherein the fiber optic eddy current and ultrasonic nondestructive testing module is connected to the Z-direction linear motion module through the rotation drive module, and the fiber optic eddy current and ultrasonic nondestructive testing module includes a mounting substrate, an ultrasonic nondestructive testing mechanism and a fiber optic eddy current testing mechanism, and the rotation drive module is used to drive the mounting substrate to rotate so as to realize the switching of the test position of the fiber optic eddy current and ultrasonic nondestructive testing module in the XZ plane. The testing instrument and the testing method solve the problems of single output parameter, inherent lift-off effect, installation inclination angle influence, poor adaptability of complex geometric morphology, and difficulty in realizing accurate testing of machining surface and its internal damage defects and residual stress.

The invention discloses an uncalibrated stress measurement method and device based on ultrasonic longitudinal wave and incremental deformation mechanics, and relates to the technical field of ultrasonic nondestructive testing, and the method comprises the steps: obtaining an ultrasonic longitudinal wave time domain signal at a detection point of a to-be-detected test piece and the thickness of the to-be-detected test piece; determining the propagation time of the longitudinal wave in the test piece to be detected based on the ultrasonic longitudinal wave time domain signal; based on the thickness of the to-be-detected test piece and the propagation time, determining the propagation speed of the ultrasonic longitudinal wave in the to-be-detected test piece; and determining a stress value at the detection point of the test piece to be detected according to the propagation velocity. According to the invention, the problem of measuring the high-order elastic constant of the material can be avoided, and the dependence of a stress measurement result on a calibration result is avoided.

The invention discloses a composite material ultrasonic nondestructive testing array device and a testing method.The composite material ultrasonic nondestructive testing array device comprises a scanning matrix structure, a mechanical arm and a control unit, and the scanning matrix structure comprises a flaw detection frame, a plurality of transverse driving mechanisms, a plurality of longitudinal driving mechanisms, a laser scanner and a plurality of ultrasonic probes; the laser scanner and the plurality of ultrasonic probes are mounted on the flaw detection frame, and the laser scanner is used for acquiring a three-dimensional model of the to-be-detected composite material component. The mechanical arm is used for flexibly positioning the carried scanning matrix structure, so that the scanning matrix structure can quickly reach different detection areas of the large composite material component; a laser scanner and a plurality of ultrasonic probes are integrated in the scanning matrix structure, firstly, the laser scanner obtains the local three-dimensional shape of a component, the control unit plans a scanning path in real time according to the model and divides detection sub-areas, and then the multiple ultrasonic probes are driven to independently move in the frame at the same time; and performing synchronous parallel scanning on the respective distribution areas.

The invention relates to metal plate rolling equipment which comprises a left fixed roller and a right fixed roller which are symmetrically arranged, a multi-layer rolling structure is adopted, through the synergistic effect of the left fixed roller, the right fixed roller and a middle adjusting roller and in combination with an upper left roller, a lower left roller, an upper right roller and a lower right roller which are arranged up and down, precise step-by-step rolling on a metal plate is achieved, and the rolling precision of the metal plate is improved. Through the dynamic pressure and curvature adjusting system, the pressure distribution and the contact state between the upper roller and the lower roller can be adjusted in real time according to the material, the thickness and the process requirements of a to-be-machined plate through the upper adjusting roller, the lower adjusting roller, the matched upper adjusting mechanism and the matched lower adjusting mechanism, and the problem of insufficient rolling caused by overpressure fracture or underpressure is effectively solved; the left detection heating mechanism and the right detection heating mechanism integrate an electromagnetic ultrasonic nondestructive testing technology and an induction heating technology, so that nondestructive testing of internal defects of a plate can be achieved in the rolling process, and local or overall efficient heating can be conducted according to needs.

The utility model discloses a coupling water supply system of a railway vehicle wheel ultrasonic nondestructive testing device, which comprises a water tank, and a wheel rotating unit for supporting a wheel and a rim flaw detection unit for detecting flaws of a wheel rim are arranged in the water tank. The wheel can be immersed in the coupling water stored in the water tank for rim flaw detection; the water tank is connected with a water inlet pipe and a water outlet main pipe, the water outlet main pipe is divided into two paths, one path is a hub water supply branch for supplying water to the hub flaw detection unit, and the other path is a spoke water supply branch for supplying water to the spoke flaw detection unit; coupling water sprayed by the hub water supply branch and the spoke water supply branch flows back to the water tank. During flaw detection, the wheel is placed in the water tank. The wheel rim is soaked in the coupling water of the water tank, and flaw detection can be directly carried out without additionally spraying the coupling water. Coupling water for hub flaw detection and spoke flaw detection directly flows back into the water tank, so that the coupling water can be directly recovered without an additional collecting pipeline, and the coupling water is convenient to recycle.

This invention discloses a wiring structure for an electromagnetic ultrasonic transducer and its application, belonging to the field of ultrasonic nondestructive testing technology. The wiring structure includes independent transmitting-side and receiving-side switch groups, allowing independent switching of the coil's topology connection during transmission and reception. Combined with a novel coil group structure design, it achieves both high-efficiency excitation and high-sensitivity reception. This invention integrates the above wiring structure into the transducer and constructs a semi-closed peripheral magnetic circuit to enhance the signal and meet the excitation energy and reception sensitivity requirements of different test pieces. This invention solves the problems of existing transducers, such as topology binding, poor adaptability, and weak detection signals. It can flexibly adapt to different testing scenarios, improve the detection signal strength and signal-to-noise ratio, and has a wide range of applications.

The utility model discloses a metal ultrasonic non-destructive testing device, which relates to the technical field of ultrasonic non-destructive testing and comprises a testing table, a side support is fixedly mounted on one side of the top of the testing table, an electric telescopic rod is fixedly mounted on the top of the side support, and sleeves are fixedly mounted at the output end of the electric telescopic rod and the top of the testing table. The metal ultrasonic detection device has the beneficial effects that the other metal ultrasonic detection probe is pushed to be in precise contact with the upper surface of a plate after the electric telescopic rod is started, and finally the sliding block can be driven to transversely reciprocate through threads by starting the servo motor to drive the reciprocating screw rod to rotate; the width of one probe on the transverse surface of the plate can be detected during movement, the rail motor can drive the detection plate to longitudinally move by the distance of the width of the metal ultrasonic detection probe to enable the undetected surface of the plate to move to the detection end of the metal ultrasonic detection probe, so that the plate can be comprehensively and automatically detected, the detection is convenient and rapid, and the detection efficiency is improved. And the detection efficiency is higher.

The invention discloses a one-transmitting and multi-receiving wavefront trajectory common tangent point double-layer medium ultrasonic imaging method based on tool center coordinates and a related device, and belongs to the technical field of ultrasonic nondestructive testing. The method comprises the following steps: establishing a workpiece coordinate system by taking a certain point on a workpiece as a coordinate origin, clamping a linear phased array probe by using a multi-axis scanning system, and inverting the position and deflection angle of each array element relative to the coordinate origin on a scanning position according to a tool center coordinate returned by each scanning position; establishing a plurality of common tangent points between a wavefront track and the curved surface workpiece by utilizing multiple groups of one-transmitting and multi-receiving ultrasonic echo signals in the full-matrix data acquired at the scanning position, and further constructing a workpiece surface contour line through interpolation processing; a workpiece surface contour line measured by a wavefront trajectory common tangent point method, an array element position under a tool center coordinate and a one-transmitting-multiple-receiving mode signal are utilized, an ultrasonic image of a curved surface workpiece is constructed through a double-layer medium delay superposition algorithm, and ultrasonic imaging of the complex curved surface workpiece under a water immersion automatic phased array detection working condition is achieved.

The invention belongs to the field of nondestructive testing, and relates to an all-optical non-contact ultrasonic nondestructive testing device, which utilizes a laser ultrasonic technology to excite a material to generate an ultrasonic signal, and is combined with a displacement table and a high-sensitivity optical microphone to realize detection and imaging of defects of a composite material plate. The whole system has the comprehensive advantages of no contact, no damage, high sensitivity, rapid signal response, strong environmental adaptability and the like, and can be widely applied to high-quality nondestructive detection requirements of various materials such as metal and nonmetal in the production, manufacturing, use and maintenance processes.

The invention discloses an ultrasonic nondestructive testing system and method for defects of a flip-chip. The ultrasonic nondestructive testing system comprises an upper computer, a pulse transceiver, an acquisition card, an ultrasonic sensor, a displacement platform, a three-dimensional motion platform and a motion controller, the upper computer serves as a control platform and is responsible for control instruction issuing and data processing. The pulse transceiver, the acquisition card and the high-frequency ultrasonic sensor form a signal acquisition and transmission platform which is responsible for transmitting, receiving, transmitting and analog-to-digital conversion of ultrasonic signals; the displacement platform is used for fixing the flip-chip bonding chip; the three-dimensional motion platform and the motion controller form a three-dimensional motion control system, and the three-dimensional motion control system is responsible for carrying an ultrasonic sensor to execute scanning at different spatial positions. The chip is integrally detected, welding spots do not need to be detected one by one, and the defect detection efficiency can be greatly improved.

The application discloses a finite element simulation calculation method of Rayleigh wave acoustic-elastic effect in a prestressed semi-infinite medium, which can realize prestressed Rayleigh wave simulation in an arbitrary waveguide section, has the advantages of fast simulation speed, and the simulation object can be arbitrarily extended. By writing a VUMAT subprogram with nonlinear characteristics, the introduction of a Murnaghan hyperelastic constitutive model is realized. Through a quasi-static superposition dynamic analysis method, the prestress and acoustic wave disturbance are loaded. Through Rayleigh wave signal post-processing, pure Rayleigh wave feature extraction is realized. The method fills the gap of simulation methods in the field of ultrasonic nondestructive testing, especially in the tomographic detection of residual stress, and has great potential.

The utility model provides an ultrasonic non-destructive detector based on wireless communication, which comprises a detector body, the detector body comprises an ultrasonic device, the bottom of the ultrasonic device is movably provided with a supporting seat, the bottom of the supporting seat is movably provided with a movable seat, the movable seat is provided with a sliding chute, and the sliding chute is provided with a wireless communication module. A sliding groove is formed in the base, a sliding block is movably installed in the sliding groove, the sliding block is installed in the sliding groove through a supporting mechanism, a clamping base is fixedly installed on the sliding block, and a fixing bolt is rotatably installed on the supporting base. According to the ultrasonic non-destructive detector based on wireless communication, when the ultrasonic non-destructive detector is used, clamping and fixing of a small pipeline are completed through the clamping seats, the clamping seats move after clamping the pipeline, three-point monitoring is completed through cooperation of the probes, clamping and limiting of a large pipeline are achieved through the probes between the clamping seats, and the ultrasonic non-destructive detector is simple in structure and convenient to use. And the influence caused by easy sliding of the detection point during use is avoided.

The invention belongs to the technical field of ultrasonic nondestructive testing, and relates to a rubber vulcanization degree online monitoring method based on an ultrasonic array, which comprises the following steps: generating a stable acoustic coupling interface on the surface of rubber to be detected; a multi-path composite sound field composed of a short-range high-density path and a long-range crossed path is constructed in the rubber to be measured; forming a multi-channel synchronous sound wave response data set; calculating the similarity of signal waveforms originating from the adjacent probe pairs which are densely arranged in parallel in the multi-channel synchronous sound wave response data set to obtain an acoustic homogeneity index; calculating a sound wave propagation velocity to obtain an average propagation sound velocity; generating a vulcanization state feature vector representing the microcosmic homogeneity and macroscopic rigid coupling state in the current vulcanization process; and determining the absolute vulcanization degree in the current rubber material. According to the method, the problem that a process procedure based on fixed time cannot adapt to performance fluctuation between batches of raw materials, tiny difference of equipment states and temperature gradient in a mold is solved.

The present invention discloses a method for tracing defect positions in ultrasonic nondestructive testing, which comprises the following steps: ultrasonically scanning a workpiece, and position-encoding the scanning trajectory path to obtain scanning signal data and coded position data; generating an image according to the scanning signal data and the coded position data; finding and selecting the defect position on the image, and obtaining the coded position corresponding to the center of the selected image area; tracing back to the defect position actually corresponding to the workpiece according to the coded position corresponding to the center of the selected image area. The present invention can first perform an overall scan on the workpiece during nondestructive testing. Although the overall scan is time-consuming, no professional personnel are required to participate in the whole process. After the scanning is completed, the defect position is found, and then according to the coded position corresponding to the defect position, the defect position point of the workpiece can be reached after scanning, and then operations such as marking, repairing or re-inspection are performed, which is conducive to improving detection efficiency and reducing costs.

The invention relates to the technical field of ultrasonic nondestructive testing and three-dimensional imaging, and provides an image enhancement method based on TransUNet beams. According to the method, training data is generated through acoustic simulation, a low-quality two-dimensional image obtained through single-angle plane wave excitation serves as network input, and a high-quality image obtained after multi-angle data coherent composite processing serves as a label. The constructed TransUNet deep neural network combines the multi-scale feature extraction capability of a convolutional network and the long-range dependence modeling advantage of a Transform module, and is used for learning the accurate mapping relation from sparse data to a high-resolution image. In practical application, the method can perform frame-by-frame enhancement on each cross-section image obtained by single-angle rapid scanning, and finally synthesize a high-precision three-dimensional image, so that efficient and accurate image enhancement of sparse data is realized.