248 results about "Phased array ultrasonics" patented technology

The invention relates to the technical field of defect detection, and discloses a flange forging defect detection method and system. The method comprises the following steps: performing three-dimensional scanning and material acoustic characteristic measurement on a to-be-detected wind power flange to obtain layer partition sound isolation path data; generating an array element excitation control file of the double-array phased array ultrasonic detection system; applying the array element excitation control file to a double-array phased array ultrasonic detection system, and performing micro defect feature enhancement on a received echo signal to obtain a feature-enhanced signal data set; performing ultrasonic emission and data acquisition on the wind power flange to obtain a global detection data set; and inputting the global detection data set into the two-stage defect detection model for defect feature extraction and classification evaluation, and generating a defect detection evaluation report. According to the method, the detection rate and the classification accuracy of the micro forging defects are improved.

The invention discloses a composite board ultrasonic defect detection method which comprises the following steps: S1, fixing a carbon fiber circumferential winding composite pressure container on a bracket, and establishing a coordinate system with the axis of the container as a z axis; s2, a 40 MHz dry coupling phased array ultrasonic probe is attached to the scanning starting point, and the contact angle of the probe is recorded; s3, moving the probe along the spiral track of the outer surface of the container at the speed of 20mm / s, and collecting A-scanning echo signals of all array elements; s4, performing pulse compression and time domain deconvolution processing on the acquired signal to obtain a time domain echo sequence; s5, delay time is calculated according to the shell curvature, the array element signals are compensated, and focusing B-scanning data are generated; s6, splicing the B-scanning data at the step length of 0.5 mm * 0.5 mm, and reconstructing C-scanning data corresponding to the space coordinates; and S7, inputting the C-scanning data into the trained Transform network, and outputting defect types, sizes and three-dimensional coordinates. The method realizes high-frequency ultrasonic composite board defect accurate detection, remarkably improves the microcrack recognition rate, and is widely applied to safety evaluation scenes of high-pressure hydrogen storage tanks and pressure vessels.

The invention discloses a planar phased array ultrasonic transducer, and relates to the technical field of transducers, the planar phased array ultrasonic transducer comprises a 1-3 type piezoelectric composite board, a common positive electrode panel and a flexible circuit board, the 1-3 type piezoelectric composite board comprises a polymer frame and a plurality of PZT piezoelectric ceramic columns, all the PZT piezoelectric ceramic columns are embedded in the polymer frame in an array, and the PZT piezoelectric ceramic columns are connected with the flexible circuit board. One end of each PZT piezoelectric ceramic column is a positive electrode end, the other end of each PZT piezoelectric ceramic column is a negative electrode end, the common positive electrode panel is connected with the positive electrode ends of the PZT piezoelectric ceramic columns, the flexible circuit board is provided with a bonding pad area and at least one pin area, the bonding pad area is fixedly provided with a plurality of bonding pads, the pin area is fixedly provided with a plurality of pins, and the flexible circuit board is provided with a plurality of conductive terminals. All the pins, all the bonding pads and all the negative electrode ends of the PZT piezoelectric ceramic columns are in one-to-one correspondence, the bonding pads are electrically connected with the pins, and the bonding pads are connected with the negative electrode ends of the PZT piezoelectric ceramic columns; according to the invention, the PZT is applied to the planar phased array ultrasonic transducer.

The invention discloses a defect detection system for a metal-composite material mixed structure device. The defect detection system comprises an industrial control computer, a mechanical scanning arm, a polarization detection probe, an ultrasonic detector assembly and a power supply, the invention further provides a defect detection method for the metal-composite material mixed structure device. The defect detection method specifically comprises the following steps: acquiring polarization image information of the metal surface; solving polarization image parameter information; carrying out surface defect detection; metal internal ultrasonic detection information is obtained; performing internal defect detection; and performing multi-mode data fusion detection. According to the invention, two information sources with complementary advantages, namely polarization and ultrasound, are selected as detection information sources of the multi-modal detection method, so that all-directional defect detection and visualization on the surface-interior of the metal-based composite material mixed structure device are effectively realized; and a feasible technical method is provided for engineering application of polarized light / phased array ultrasonic multichannel integrated detection.

The invention belongs to the technical field of laser manufacturing and green manufacturing, and discloses an ultrahigh-power laser low-loss repair method for deep defects of a thick plate, which comprises the following steps: identifying the positions, types and three-dimensional shapes of the surface and deep defects (pores and cracks) of the thick plate through a phased array ultrasonic detection module (PAUT); on the basis, a laser space energy distribution repairing path for specific defects is automatically planned; carrying out an ultra-high power laser defect remelting process; finally, whether the surface and the deep part of the thick plate have defects or not is recognized again through the ultrasonic detection module, low-damage repair of the deep part defects of the thick plate is achieved, and the use efficiency and the service life of a repaired part are improved.

The invention discloses an oil storage tank oil-water interface measurement system and method and a storage medium, and relates to the technical field of oil-water interface measurement, and the system comprises a data acquisition module, a data processing module, a decision support module and a data security module. According to the oil-water interface measuring system and method for the oil storage tank and the storage medium, a three-dimensional sensing network (distributed sensor network) is constructed by adopting a pressure sensor array and phased array ultrasonic scanning technology and combining dielectric property detection of a microwave dielectric constant sensor; the pressure, the dielectric constant, the liquid level and the vibration data in the tank body are obtained, basic data are provided for subsequent processing, the comprehensiveness of data obtaining can be improved through the sensing network, the pressure data are dynamically calibrated through Takagi-Sugeno fuzzy logic, the influence of temperature drift is effectively eliminated, and the accuracy of data obtaining is improved. The ultrasonic signals are subjected to feature enhancement through the generative adversarial network, and the emulsion layer boundary is accurately recognized.

The utility model relates to the technical field of phased array ultrasonic detection, in particular to a phased array ultrasonic detection pipeline scanning device which comprises a detection equipment body, a detection probe and a track ring, and the track ring is provided with a movable assembly used for carrying the detection probe for automatic detection. The movable assembly comprises a movable frame arranged on the track ring and used for driving the detection probe to move, and two pulleys and a transmission part used for driving the movable frame to move are arranged between the movable frame and the track ring. By arranging the movable assembly, the motor can be started to drive the gear to rotate on the gear ring, the movable frame does circular motion on the track ring under the cooperation of the guide groove and the pulley, and the detection probe is driven by the long bolt and the electric push rod to move and scan on a welding seam on the surface of a pipeline, so that the welding seam is detected; the long bolt is arranged, so that the position of the detection probe is adjusted under the action of the guide rod and the electric push rod in the rotating process, and the position of the detection probe is located at the optimal welding seam detection position.

The invention discloses a phased array ultrasonic detection rough surface coupling agent dynamic supplementing and sealing system which comprises a flexible sealing structure, a coupling agent supply unit, a pressure feedback control unit and a self-adaptive attaching structure. A flexible sealing structure is adopted to form a continuous liquid coupling film between the probe and the detected joint, and the coupling agent supply unit actively supplies liquid to keep the thickness of the liquid coupling film stable in a range of 0.5-1.5 mm so as to reduce ultrasonic energy loss and a blind area; in addition, the coupling agent liquid can be controlled not to leak or the leakage can be controlled within an acceptable range through the sealing mechanism, and the coupling agent supply unit is matched to continuously and stably supply the liquid, so that the coupling layer is ensured to be uninterrupted in the scanning process.

The invention relates to the technical field of wheel spoke plate detection, in particular to a bullet train wheel spoke plate crack online detection device based on phased array ultrasound, which comprises a base, a rotating shaft is rotatably arranged at the center of the upper end of the base, a fixing frame is connected to the upper end of the base, an outer cover is slidably arranged in the fixing frame, an ultrasonic probe is slidably arranged in the outer cover, and the ultrasonic probe is connected with the rotating shaft. And the upper end of the outer cover is connected with a plurality of groups of conveying pipes A. When the outer cover descends, the wheel hub during detection is heated, so that after the wheel hub is heated, the size of a material is increased due to thermal expansion, if a radial plate has cracks, the tip or the surface of the cracks can be expanded more obviously due to expansion, a reflection interface is clearer when ultrasonic waves enter the cracks, and the detection accuracy is improved. The intensity of reflected echo signals is enhanced, a detection system can conveniently recognize tiny cracks, meanwhile, impurities such as condensate water and oil dirt on the surface of the hub can be reduced through heating, the viscosity of a surface coupling agent is reduced, the coupling effect of the probe and the hub is improved, and noise signals caused by poor coupling are reduced.

The application provides a hydrogen pipeline defect detection method and system, equipment and a storage medium, and belongs to the technical field of defect detection. The method comprises the following steps: acquiring phased array ultrasonic detection data, digital radiographic imaging data and hydrogen concentration data of a hydrogen pipeline; extracting defect boundary features based on the phased array ultrasonic detection data, extracting defect microstructure features based on the digital radiographic imaging data, and extracting hydrogen concentration spatiotemporal distribution features based on the hydrogen concentration data; constructing a modal correlation graph by taking the defect boundary features, the defect microstructure features and the hydrogen concentration spatiotemporal distribution features as nodes, and determining the edge weight between every two nodes in the modal correlation graph according to the mutual information of the two nodes; generating a multi-modal correlation feature vector based on the modal correlation graph; and obtaining a defect detection result of the hydrogen pipeline based on the multi-modal correlation feature vector. The application can improve the accuracy of hydrogen pipeline defect detection.

The invention relates to the technical field of nondestructive testing, and discloses a full-focusing phased array ultrasonic detection probe for a petroleum drilling tool and a detection method.The full-focusing phased array ultrasonic detection probe comprises a probe body; the probe body is attached to the end part of a drilling tool and the unthreaded outer wall of the drilling tool; a first array element is arranged at the end part, corresponding to a drilling tool, of the probe body and is used for simultaneously exciting to generate ultrasonic waves parallel to the end part of the drilling tool and receiving reflection echoes of internal thread defects of the drilling tool; a second array element is arranged at the position, corresponding to the unthreaded outer wall of the drilling tool, of the probe body and used for receiving reflection echoes of internal thread defects of the drilling tool, and the problem that the number of array elements capable of being arranged is too small due to the fact that a traditional full-focusing phased array ultrasonic detection method is limited by the small size of the end of the drilling tool is effectively solved. And early detection and qualitative and quantitative detection of the defects are realized.

The invention discloses a pipeline detection device and method based on phased array ultrasonic waves, and relates to the technical field of pipeline detection. The pipeline detection device based on phased array ultrasonic waves comprises a shell with an opening in the lower portion and a phased array ultrasonic detector installed in the shell, an arc-shaped filter plate is fixedly connected to the upper portion of a strip-shaped discharging groove in an embedded mode, and a scraping and collecting mechanism used for scraping and collecting a coated coupling agent in time after detection is completed is arranged on the right portion of an inner cavity of the shell. According to the invention, the coupling agent is uniformly coated on the surface of the pipeline in a thickness-constant manner through the self-extrusion coating mechanism, the consistency of acoustic impedance in a welding seam or a detection area is ensured, the stability of ultrasonic echo intensity is improved, and a detection blind area caused by coating missing is avoided, so that the detection accuracy and reliability are improved; couplant can be scraped and collected in time after detection, the retention time of the couplant on the surface of the pipeline is shortened, solidification residues are effectively prevented, and the surface quality of the pipeline is protected.

The invention discloses an underwater pouring concrete defect detection device, relates to the technical field of engineering detection, and particularly aims to solve the problems that an existing underwater pouring concrete defect detection method is limited by water medium attenuation, surface irregularity, concrete material characteristics and the like, and the detection efficiency is low. Therefore, the problems of unclear imaging, insufficient coverage and difficult effective acquisition and identification of defect signals are solved. The device is characterized by comprising an underwater operation platform, a multi-mode acoustic detection module integrated with a phased array ultrasonic and acoustic emission sensor array, a self-adaptive acoustic coupling mechanism, a high-precision positioning and three-dimensional scanning module and an intelligent data acquisition and processing unit. By adopting the technical scheme, efficient, accurate and reliable detection and three-dimensional positioning of internal and surface defects of the underwater pouring concrete structure are realized, and the underwater pouring concrete structure detection system has high detection precision, high applicability, high automation degree and good environmental robustness.

The invention discloses a cannonball shell ultrasonic automatic detection system and method, and the system comprises a feeding system which is used for placing a to-be-detected cannonball shell to a to-be-detected station; the ultrasonic detection system adopts a water immersion method or a semi-water immersion method to synchronously carry out ultrasonic flaw detection (A scanning, B scanning and C scanning, and is also suitable for a phased array ultrasonic detection method) on the barrel body and the bottom of the shell to be detected; the air-blowing system is used for carrying out air-blowing drainage operation on the detected cannonball shell so as to ensure that the whole cannonball shell is dry; and the discharging and sorting system is used for respectively placing the detected cannonball shells to appointed stations according to qualified or unqualified cannonball shells. The system has the characteristics of high workpiece detection efficiency and high accuracy, can perform ultrasonic scanning on workpieces of different specifications through different programs, is a professional automatic flaw detection system, and has the advantages of strong anti-interference capability, stable waveform, high precision, high reliability, simplicity in operation, high safety and good maintainability. The system not only can be used for detecting various shell shells, but also can be used for detecting tube bars or shells with different specifications.

The invention belongs to the technical field of laser remanufacturing and high-end equipment repairing, and particularly discloses a steam turbine rotor R angle laser cladding repairing process which is used for conducting segmented multi-layer laser cladding on a steam turbine rotor R angle to ensure that the laser cladding thickness reaches the steam turbine rotor R angle repairing thickness and has machining allowance. The thickness of each layer of laser cladding is 0.7 mm-0. 9 mm, and ultrasonic impact stress relief treatment is carried out after each section of laser cladding is completed. And PT nondestructive flaw detection, phased array ultrasonic detection, hardness detection and residual stress detection are fused to ensure the repair quality. The rotor is suitable for 530 DEG C high-temperature and high-pressure working conditions, the cost is greatly reduced compared with rotor replacement, and the rotor has remarkable industrial application value.

A phased array ultrasonic testing comparison block and method for micro-defect detection of weld joints is disclosed. The comparison block comprises a first comparison block, a second comparison block, and a third comparison block used in combination. Each of the first, second, and third comparison blocks is provided with an artificial reflector. The artificial reflector comprises a transverse hole structure and a groove structure disposed on the surface of the comparison block and extending along its thickness. The transverse hole structure comprises a 0.1×6 mm transverse blind hole, a 0.5×6 mm transverse blind hole, a 0.3 mm transverse through hole, and a 0.5 mm transverse through hole. The groove structure comprises specifications of 0.5 mm width, 0.5 mm depth, and 5 mm length, 0.3 mm width, 0.3 mm depth, and 5 mm length, 0.2 mm width, 0.2 mm depth, and 5 mm length, 1 mm width, 2 mm depth, and 5 mm length, 0.5 mm width, 1 mm depth, and 5 mm length. The present invention can effectively quantify micro-defects in weld joints, achieving the purpose of quickly and intuitively assessing defect size.

The invention provides a phased array ultrasonic interface debonding detection method for a multilayer curved surface bonding structure, which comprises the following steps of: accurately calculating delay time of each array element in a phased array ultrasonic probe to a target focus by designing a delay block attached to a solid engine and aiming at a cylindrical special structure; therefore, in-phase superposition of sound waves at the target focus is achieved, focusing of sound beams is achieved, the problem of delay time calculation of sound waves emitted by all array elements of a phased array probe of a cylindrical structure is solved, and the problem of control over the deflection angle and the focusing depth of the sound beams synthesized after the sound waves pass through a plurality of curved surface interfaces is solved. Accurate positioning and visual representation of the debonding defect of the deep interface are realized. The technology provides a new technical means for accurately judging the interface debonding defect, and has important significance for guaranteeing the structural integrity and the use safety of the interface debonding defect.

The invention provides a phased array ultrasonic nondestructive evaluation method and system for the grain size of a complex component, and belongs to the technical field of ultrasonic nondestructive testing. Comprising the following steps: detecting a workpiece with multiple curved surfaces by adopting a liquid immersion mode in cooperation with a phased array ultrasonic probe array, and dividing to-be-detected areas of different structure types according to the shape characteristics of the workpiece; an acoustic beam focusing rule and an acoustic beam propagation path of the phased array ultrasonic probe array are designed, and phased array ultrasonic detection parameters are designed for to-be-detected areas of different structure types according to size parameters of workpieces; detecting grain sizes of to-be-detected areas of different structure types of a workpiece, and collecting phased array ultrasonic signals of the to-be-detected areas through the phased array ultrasonic probe array; calibrating the collected phased array ultrasonic signals of each to-be-detected area, and respectively calculating the average attenuation coefficient of the phased array ultrasonic probe array signals of each to-be-detected area; and calculating the grain size of the to-be-measured area through a pre-constructed grain size phased array ultrasonic evaluation model.

The utility model belongs to the technical field of nondestructive testing, and particularly relates to a phased array scanning frame device for detecting plug-in fillet welds, which is characterized in that a clamping mechanism realizes the action of clamping a sliding plate to adjust the clamping thickness of a device; the moving mechanism realizes the action of adjusting the position of the phased array ultrasonic probe by the upper moving plate; and the angle adjusting mechanism realizes the action of rotating the bottom plate to adjust the angle of the phased array ultrasonic probe. According to the phased array scanning frame device for detecting the plug-in fillet weld, a clamping motor, an upper moving motor and a lower moving motor are synchronously controlled through a PLC, a clamping sliding plate is adjusted to enable the device to be stably connected to the surface of a detected workpiece, movement of an upper moving plate is adjusted, the position of a phased array ultrasonic probe is changed, and the angle of a rotating bottom plate is adjusted; the angle of the phased array ultrasonic probe for detecting the welding seam is changed, the elliptical track of the inserted welding seam is detected, and the technical problem that an existing scanning device cannot detect the elliptical track of the inserted welding seam is solved.

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.

The invention relates to the technical field of nondestructive testing of power systems, in particular to a phased array ultrasonic testing method and system for internal defects of a wall bushing. Comprising the following steps that the outer surface of a metal layer of the wall bushing is cleaned and polished; measuring the outer diameter of the wall bushing and the thickness of a metal layer; a phased array ultrasonic probe is placed on the surface of the processed metal layer in a coupling mode, and a center array element of the phased array ultrasonic probe is activated to collect A scanning signals; setting a focusing depth and a scanning angle range according to the thickness of the metal layer; and activating all array elements of the phased array ultrasonic probe, and starting a gain compensation mode of the phased array ultrasonic flaw detector. According to the method, the multi-array-element electronic scanning and real-time imaging technology is utilized, a large-area area can be covered through single-time fan-shaped scanning, early-stage defects (such as micro air gaps and cracks) which do not cause temperature rise can be sensitively recognized, the detection efficiency and the detection capacity are remarkably improved, and the problems of infrared leak detection and low radiographic detection efficiency are effectively solved.

The invention discloses a pile foundation concrete accurate pouring control system and method based on multi-source sensing fusion. The pile foundation concrete accurate pouring control system comprises a sensing layer and a control layer, wherein the sensing layer comprises a phased array ultrasonic probe, a binocular vision sensor and a laser ranging array; the modeling layer comprises a three-dimensional hole shape reconstruction module and a BIM digital modeling engine; the data layer comprises a real-time monitoring database and a multi-source data fusion center; the decision-making layer comprises a concrete dynamic evaluation model and a BIM visual platform; the execution layer comprises a self-adaptive PID controller used for adjusting the concrete pumping rate according to the decision instruction, and a three-dimensional visualization terminal used for displaying the BIM model with the tolerance zone in real time. According to the method, a BIM model containing dynamic compensation is constructed through ultrasonic three-dimensional scanning, closed-loop control is achieved by fusing multi-source sensing data, and tolerance band penetration early warning and self-adaptive PID adjustment are combined. The hidden defect discovery rate is improved, and the comprehensive construction efficiency is improved.

Apparatus, systems, and methods for pipeline condition assessment using phased array ultrasonic transducers are disclosed. A sensing module for assessing pipeline condition comprises a body; and one or more phased array ultrasonic transducers (PAUTs) assembled on the surface of the body, each PAUT configured to emit multi-channel ultrasonic waves for scanning a pipe wall.

A handheld ultrasound guiding system for the transcutaneous delivery of a needle into blood vessel that can be used to then deliver a guidewire, the battery powered light-weight device consisting of a phased array ultrasound generator, a transducer probe, a screen, computer processor that is mechanically coupled to a needle holder mounted at an angle to the ultrasound probe, the needle is mounted such that it can be advanced into a target blood vessel that is being visualized real-time by the ultrasound probe.

The invention discloses a pipeline welding seam nondestructive testing method which comprises the following steps: knowing a material mark, a welding seam type, a welding process, a groove form, a size and a range of a to-be-detected piece, and pretreating the to-be-detected piece to obtain the pretreated to-be-detected piece; a probe moving area is coated with a coupling agent, the reflection angle and the emission depth are selected, and a phased array ultrasonic detector is used for scanning a weld joint of the pretreated to-be-detected piece; after scanning is completed, detection data or a scanning image is input, and a suspicious area can be found according to the detection data or the scanning image; detecting the suspicious area again by using the ray detector, and obtaining detection data and a ray image; and analyzing the two detection data and images, determining the condition of the welding seam, and generating a detection report including quality evaluation, defect type, position and size of the welding seam. The method is used for solving the technical problem of low detection accuracy of the pipeline welding seam.

The invention provides an aluminum bar internal inclusion and pore detection system based on an ultrasonic flaw detection technology, and relates to the technical field of ultrasonic detection, and the system comprises a construction module which is used for constructing a detection module by taking an end face center point of an aluminum bar as a first reference position, taking the center of a phased array ultrasonic probe array as a second reference position, and taking a reference positioning edge of a detection table as a third reference position; a dynamic adjustable detection coordinate system is constructed; the calculation module is used for dividing the detection coordinate system into a plurality of hierarchical scanning sub-regions according to the two-dimensional spatial topological characteristics of the detection coordinate system and the actual size and shape distribution rule of the end face of the aluminum bar; and according to the spatial position and the area of each scanning sub-region and the geometric distribution characteristic of the distance between each scanning sub-region and the core region of the end surface of the aluminum bar, calculating to obtain a focusing delay parameter and a scanning path parameter corresponding to each sub-region. According to the invention, accurate and efficient detection of non-metallic inclusions and pore tiny defects in the aluminum bar is realized.

The invention relates to a method for detecting microcracks on the inner wall of a wall enclosure superheater of a boiler. The method comprises the following steps: macroscopically identifying and preliminarily screening a high-risk area; creating an endoscope channel based on the primary suspicious area list and performing primary peeping on the inner wall; carrying out detection surface preparation and acoustic coupling optimization; data acquisition is carried out through accurate arrangement of the small-sound-velocity self-coupling phased array ultrasonic probe; extracting defect signal features and carrying out three-dimensional digital modeling; performing crack depth accurate quantization based on a time of flight diffraction mode; carrying out comprehensive data analysis and evaluating a security level; and integrating detection results, and generating a digital file based on the results. According to the invention, standardization of the detection process and systematization of data management can be realized, the detection efficiency and accuracy are greatly improved, a scientific basis is provided for equipment life prediction and maintenance decision, and the safe operation level of the boiler is effectively improved.

The utility model discloses a phased array ultrasonic testing technology verification test block, which comprises a test block body made of the same material as a target product to be tested, the test block body is arranged in a shape of the target product, a welding seam is arranged on the test block body, the welding seam is formed by adopting the same welding process as the target product, and the test block body is made of a stainless steel material. The specification and the excess weld metal of the welding seam are consistent with those of a target product; welding defects are arranged on the welding seam, and the welding defects comprise one or more combinations of an upper surface groove, a lower surface groove, a longitudinal crack, a transverse crack, incomplete fusion, incomplete penetration, a strip-shaped defect, a circular defect and slag inclusion. According to the utility model, the test block body and the welding defects thereof are designed, so that the manufactured test block body can be used for verifying the accuracy, detectability and reliability of a phased array ultrasonic inspection technology instead of a ray inspection technology in the manufacturing and mounting process of nuclear safety level equipment, and the nuclear safety is ensured.

The invention belongs to the field of material detection and evaluation, and discloses a phased array-critical refraction longitudinal wave-based plane stress detection method, which comprises the following steps: estimating a material sound velocity range, optimizing a phased array ultrasonic delay rule, obtaining a change curve of different excitation sound velocities and critical refraction longitudinal wave amplitudes, and extracting an optimal excitation sound velocity; critical refraction longitudinal waves are excited in the sample with the optimal excitation sound velocity, and processing such as interpolation and filtering is carried out on signals received by array elements of a receiving probe; obtaining the amplitude and sound time of critical refraction longitudinal waves, and calculating the sound velocity of the critical refraction longitudinal waves and the sound time difference of different array elements for receiving the critical refraction longitudinal waves; establishing the change relation of the critical refraction longitudinal wave sound velocity, the amplitude and the sound time difference along with the stress. According to the method, the critical refraction longitudinal wave acoustic time-stress relation in a traditional stress test method is improved into the critical refraction longitudinal wave acoustic time-stress-array element spacing relation, and the problems that in the traditional method, material adaptability is poor, acoustic time calculation stability is poor, and stress test reliability is low are effectively solved.

The invention discloses a wear-resistant ceramic composite pipe line detection device, which belongs to the field of defect detection, and comprises a support table, a bearing rotation driving part which is connected to the upper end of the support table, supports a pipe body and can drive the pipe body to rotate, and a side seat I and a side seat II which are connected to the upper end of the support table and can perform translational motion, the outer-layer detection part is connected to the upper end of the supporting table and comprises an eddy current detection probe and a lifting assembly which is fixedly connected to the upper end of the supporting table and drives the eddy current detection probe to ascend and descend; a combined detection mode of outer layer detection and inner layer detection is adopted, cracks on the surface and near the surface of a metal matrix are detected in an eddy current detection mode, cracks on an internal ceramic layer are detected in a detection mode of phased array ultrasonic waves and a coupling medium, and the cracks can be focused and penetrate into the ceramic composite layer; and cracks, delamination and cavities of the ceramic layer and the bonding quality of the ceramic interface are detected, so that the defect detection rate and the detection precision are greatly improved.