694 results about "Destructive testing" patented technology

The invention relates to the technical field of special equipment nondestructive testing image intelligent identification, and discloses a special equipment nondestructive testing image defect automatic identification method and system, and the method comprises the steps: carrying out the preprocessing based on an anisotropic diffusion mechanism; a local self-adaptive threshold method is adopted to complete preliminary defect area positioning; constructing a scale consistency constrained multi-scale image pyramid; constructing defect morphological parameters; and carrying out defect type identification by fusing fuzzy form constraint and an SVM classification mechanism. In the prior art, a global filtering or fixed threshold segmentation method is mostly dependent, and especially under the conditions of V-shaped grooves, multi-layer weld structures and corrosion perforation defects, accurate identification of irregular, multi-scale and weak-contrast defects cannot be realized. According to the method, the anisotropic diffusion mechanism is introduced, the multi-scale response extraction of scale consistency constraint is combined, and the classification strategy of fuzzy form modeling is fused, so that the accuracy of special equipment image defect identification is improved.

The invention provides a multi-mode ultrasonic fusion pressure vessel weld defect nondestructive testing method and system, and relates to the technical field of nondestructive testing. According to the method, geometric parameters of a welding seam are obtained through three-dimensional laser scanning, and an optimal scanning parameter set is generated; driving ultrasonic phased array equipment to scan for one time and synchronously acquire shear wave full-matrix capture and longitudinal wave linear scanning data; performing energy flow angular spectrum analysis and envelope analysis on the bimodal data, extracting defect feature parameters and constructing a three-dimensional feature tensor; carrying out multi-dimensional feature fusion by adopting Tucker decomposition, and enhancing a core tensor through physical modeling; generating three types of defect indication diagrams including a defect existence possibility diagram, a defect relative scale diagram and a defect space orientation diagram from the enhanced feature tensor; and the three types of indication diagrams are visually presented for comprehensive interpretation of detection personnel. Through multi-modal data fusion and physical modeling enhancement, the defect identification accuracy and detection efficiency are remarkably improved, the false alarm rate is reduced, and reliable technical support is provided for pressure vessel welding seam safety detection.

The invention discloses a nondestructive testing method for a welding seam of a steel structure. The method comprises the steps that firstly, morphology data of the surface of a building steel structure are obtained through a high-precision laser scanner and an electromagnetic induction technology; coating thickness distribution and weld surface roughness are analyzed based on the morphology data, and a surface information matrix is constructed; then automatically adjusting ultrasonic wave beam parameters of the ultrasonic phased array by using the adaptive parameter regulation and control model and executing detection to obtain a preliminary ultrasonic echo signal; the time-frequency domain difference between the preliminary echo and the reference signal is calculated through an echo signal compensation model, and secondary compensation is completed to obtain an optimized ultrasonic echo signal; fusing the optimized echo signal, the morphology data and the surface information matrix to construct a detection data set, and adopting a pre-trained steel structure detection model to realize defect detection; and finally, evaluating the confidence of a detection result by adopting a three-dimensional confidence evaluation model, performing grading, and performing local re-detection and parameter adjustment on a low-confidence region to form closed-loop optimization. According to the method, the surface state of the steel structure can be adaptively matched, the accuracy of echo signals and the defect detection precision are improved, and the detection reliability is guaranteed through three-dimensional confidence evaluation.

The invention relates to the technical field of nondestructive testing and performance analysis of engineering materials, in particular to a nondestructive testing and performance degradation analysis method for bridge structure materials. The method comprises the following steps: acquiring material nondestructive testing monitoring data, and executing unified alignment, noise portraying and quality labeling; carrying out combined noise reduction and component evaluation, and generating a noise reduction parameter snapshot; extracting a marginal spectrum and characteristic energy ratio, and establishing a material characterization characteristic index dictionary; calculating a variation index, judging material performance degradation, and constructing a supervision signal; and training the prediction network, generating a trend and a residual error, and completing early warning fusion by adopting a time neighborhood consistency strategy to obtain a material performance degradation early warning level sequence. According to the method, continuous nondestructive monitoring and quantitative characterization of material levels are realized, characteristics and parameters are traceable, cross-channel and cross-time evaluation is consistent, prediction and early warning are sensitive and stable, and the method is suitable for long-term service safety evaluation.

The invention discloses an electric spark nondestructive testing evaluation method for the integrity of a waterproof layer of a cable trench, and belongs to the technical field of nondestructive testing, and the method comprises the following steps: applying a multi-frequency electric signal through a preset moving electrode; the initial contact pressure of the moving electrode and the surface of the waterproof layer is obtained in real time, the pressure of the contact position of the moving electrode is adjusted, an electric spark signal generated at the defect position of the cable trench waterproof layer by a multi-frequency electric signal applied by the moving electrode is captured, and characteristic parameters of the electric spark signal are extracted to generate current electric spark characteristic data; utilizing the current electric spark characteristic data to distinguish defect types so as to generate a defect evaluation result; and outputting defect distribution information and triggering an acousto-optic alarm according to a defect evaluation result. According to the method, a detection mode of combining multi-frequency electric signal excitation and electric spark signal feature extraction and analysis is adopted, waterproof layer defect types can be distinguished, the severity of the waterproof layer defects can be evaluated, and the detection accuracy is improved.

The invention provides a steel wire rope nondestructive detection device and method, the detection device comprises a shell, a signal processing module and a plurality of probes, the shell is provided with a detection cavity, the detection cavity penetrates through the shell along the axial direction of the shell, and the detection cavity is used for placing a steel wire rope; the plurality of probes are arranged on the inner wall of the detection cavity, and each probe is connected with the signal processing module through a wire; the probe comprises an excitation coil and two detection coils, the two detection coils are located on the two sides of the excitation coil, and the excitation coil and the detection coils are coaxially arranged, so that the detection coils can be most effectively coupled with eddy current magnetic field signals generated by the excitation coil and modulated by defects, and the signal acquisition efficiency is improved.

The invention relates to the technical field of power transmission line detection devices, and particularly discloses a lightweight power transmission line X-ray imaging detection device which comprises a rack, two groups of walking mechanisms and a detection mechanism. The rack is provided with a telescopic extension rod, and the detection mechanism is arranged at the tail end of the extension rod. The walking mechanism comprises a walking arm and a walking wheel which can synchronously move in the Y direction, and the detection mechanism comprises an imaging plate and a ray source which can be adjusted in multiple directions. According to the device, by simplifying the structure of the walking arm, adopting the translation driving device, optimizing the layout of the detection mechanism and the like, the light weight of the whole structure is realized. According to the design, the weight and the size of the device are reduced, transportation and high-altitude deployment are facilitated, meanwhile, the walking stability is guaranteed through reasonable gravity center arrangement, and nondestructive testing on the power transmission line can be efficiently completed.

The invention relates to the technical field of welding seam detection, and provides pressure vessel welding seam nondestructive detection equipment which comprises a fixing mechanism and a detection mechanism. The fixing mechanism comprises a fixing frame, an operation ring and a fixing assembly inserted in the operation ring, the operation ring is rotatably arranged on the fixing frame, and a plurality of abutting plates are slidably arranged on the fixing assembly; the detection mechanism comprises a shifting frame, an operation cylinder, an outer detection assembly and an inner detection assembly, a guide rail is installed at the bottom of the shifting frame, the operation cylinder is rotationally arranged on the shifting frame, the outer detection assembly is fixed to one end of the operation cylinder, and the inner detection assembly is installed at the other end of the operation cylinder; an outer detector and an inner detector used for extending into the pressure container are arranged on the outer detection assembly and the inner detection assembly respectively. The invention solves the problem that the existing nondestructive testing equipment is difficult to automatically detect the internal defects of the welding seam, and has the advantages of compact structure, capability of replacing part of manual labor force and good detection effect.

The invention provides a nondestructive testing method and system for the quality of a filling body based on ultrasonic pulse speed, and belongs to the technical field of green mining of deep mineral products and quality detection of filling bodies. The system integrates an ultrasonic pulse wave velocity test module, a data processing module, a result output module and an adaptive calibration module which work cooperatively. According to the method, a UCS-UPV power function quantitative model is constructed through a three-factor multi-level test, in-situ-indoor deviation is eliminated in combination with an environment + stress two-dimensional adaptive correction coefficient, and filling body quality grading and evaluation are achieved through on-site ultrasonic detection and strength inversion. According to the method, nondestructive detection is adopted, various stope scenes from shallow parts to deep parts are adapted, a quality control closed loop and a data tracing system can be formed, stope stability and mining safety are effectively guaranteed, and the technical problems that a traditional detection method is high in destructiveness, high in cost and poor in timeliness, and existing ultrasonic detection is insufficient in adaptability and limited in precision are effectively solved.

The preparation method of the A1-grade nondestructive inspection high-impact-toughness TC4 titanium alloy large-size bar comprises the steps that a secondary finished product cast ingot is subjected to a multi-heating-number high-temperature single-phase beta-region large-deformation forging process in the cogging stage, and as-cast grains are fully crushed and refined in the modes of axial upsetting, lateral upsetting, diagonal upsetting and the like; then, high-low-high-low repeated forging is conducted at the temperature above and below the phase transformation point, grain homogenization is achieved through high-temperature dynamic recrystallization, an original grain boundary is eliminated, and deformation dead zones of a corner angle area are effectively reduced in combination with multi-heating-number diagonal drawing-out forging; and finally, multi-heating-number forging is conducted in the two-phase region, a heat treatment process is combined, the microstructure form is further optimized, and a lamellar alpha structure is controlled to guarantee the low-temperature impact performance. According to the method, the structure uniformity of the TC4 alloy bar can be remarkably improved, the A1-level nondestructive testing requirement is met, and the method has excellent axial and chordwise mechanical properties and is suitable for ocean equipment and other high-end application fields with strict requirements for the comprehensive performance of materials.

The invention relates to the field of industrial nondestructive testing and intelligent image analysis, in particular to a nondestructive testing digital image defect automatic positioning method and device. The system comprises an image preprocessing module, a multi-scale feature extraction module, an attention fusion positioning module and a defect mask output module. The method comprises the following steps: firstly, carrying out normalization and enhancement processing on an original digital ray image, then extracting multi-level image features through a convolution structure with a multi-scale receptive field, introducing a channel attention mechanism to carry out weighted enhancement on a defect area, and carrying out layer-by-layer up-sampling and fusion on a feature map by adopting a decoder to obtain a multi-level image; and finally outputting a pixel-level defect mask pattern. The system supports end-to-end training, has the advantages of high positioning precision, low calculation complexity, high adaptability and the like, and is suitable for a high-precision defect detection scene.

The invention discloses a nondestructive testing method for a welding seam of a storage tank, and belongs to the technical field of nondestructive flaw detection. Comprising the following steps of: driving an ultrasonic probe, a thickness sensor and a DR equipment main body by utilizing a driving guide rail main body, respectively acquiring ultrasonic echo data, ray density data and coupling agent thickness of a storage tank welding seam, calculating a defect characteristic index by weighting and fusing an amplitude characteristic and a time characteristic, and introducing a density difference characteristic; correcting defect feature indexes through multi-modal product fusion to obtain fusion defect confidence, dynamically adjusting amplitude weight coefficients of amplitude features based on the signal-to-noise ratio of ultrasonic echoes of an ultrasonic probe and the thickness of a coupling agent to obtain corrected amplitude weight coefficients, and judging defect types according to the fusion defect confidence. According to the method, the defect preliminary classification is realized through double-feature fusion, the confidence coefficient is enhanced through multi-modal fusion, the weight is corrected through noise feedback, a'noise self-adaption-feature optimization 'closed loop is formed, and then the accurate identification and low misjudgment detection of the welding seam defect of the storage tank are realized.

The invention discloses a critical current nondestructive testing device for a joint-free high-temperature superconducting tape. The critical current nondestructive testing device comprises a testing tape reel, a fixing plate, a testing tape reel motor rotating shaft, an air heater, a tension sensor, a wire guide wheel, a magnetizing device, a double-hole Hall sensor, a liquid nitrogen Dewar and the joint-free high-temperature superconducting tape. The test tape reel is used for placing the joint-free high-temperature superconducting tape; the testing tape reel motor rotating shaft is used for connecting the motor and the testing tape reel, and the air heater is used for blow-drying the tape to prevent the surface of the superconducting tape from freezing. The tension sensor is used for carrying out real-time and on-line monitoring on the tension applied to the superconducting tape. The wire guide wheel is of a bearing supporting structure and comprises a built-in deep groove ball bearing or sliding bearing. And the magnetizing device is used for magnetizing the high-temperature superconducting tape. The double-hole Hall sensor can detect magnetic field distribution on the surface of the magnetized strip. The double-hole Hall sensor is provided with a double-hole structure, and the slit strip is detected through the wire passing double holes.

The steam turbine blade in-situ nondestructive testing device comprises a machine body, a pair of crawler belts, a detector, a sliding mechanism and a heating mechanism, the pair of crawler belts are arranged on the two opposite sides of the machine body, the detector is arranged at the bottom of the machine body, the sliding mechanism is arranged at the front end of the machine body in a telescopic mode in the advancing direction of the machine body, and the heating mechanism is arranged on the machine body. The heating mechanism is arranged at the bottom of the machine body and connected to the sliding mechanism, the heating mechanism is located in front of the detector in the advancing direction of the machine body, the sliding mechanism has an extending state and a contracting state, when the sliding mechanism is in the extending state, part of the sliding mechanism and the heating mechanism are located outside the machine body, and when the sliding mechanism is in the contracting state, part of the sliding mechanism is located outside the machine body. The sliding mechanism and the heating mechanism are located in the machine body. By arranging the sliding mechanism, the heating mechanism can be stored in the machine body, so that the crawler belt can climb the steps conveniently, the distance between the detector at the rear end of the machine body and the blade steps is closer, and the detection accuracy of the device is improved.

The invention relates to the technical field of track nondestructive testing and crack quantitative evaluation, in particular to a track crack in-transit nondestructive testing and quantitative evaluation method based on electromagnetic eddy current, which comprises the following steps of: synchronously acquiring eddy current response voltage signals of a dual-band sensor array through a high-speed data acquisition module, associating track space position coordinates, and determining the track crack in-transit nondestructive testing and quantitative evaluation. Dynamically adjusting the sampling frequency according to the advancing speed; vibration noise is eliminated through wavelet noise reduction, in-phase and orthogonal components of all frequency bands are decoupled and separated through a digital lock-in amplifier, and a three-dimensional feature vector set is constructed; a double-cascade evaluation model is input, a first-stage convolutional neural network identifies crack existence and a spatial distribution mode, and a second-stage physical constraint inversion network calculates crack depth, length and inclination angle; risk grades are divided according to a multi-parameter decision rule, a structured report containing standard railway mileage information is generated and transmitted to a ground system, the detection accuracy and stability are improved, and a reliable basis is provided for track maintenance.

The invention belongs to the technical field of rivet-free bonding, discloses a CNN-Transform-based mechanical property prediction method for a rivet-free bonded joint, and aims to solve the problems that the existing mechanical property detection of the rivet-free bonded joint needs a destructive test, the prediction efficiency is low, and the prediction precision is insufficient. The method comprises the following steps: firstly, acquiring micron-scale and nano-scale morphology images of an upper plate and a lower plate of a rivet-free bonded joint through a white light interference microscope and an atomic force microscope, and completing standardized pretreatment; feature re-calibration is completed through a double-plate cross-scale interaction attention enhancement module, depth features are extracted through a four-branch CNN, and global association is established through cross-plate interaction Transformer; and finally, predicting the maximum peak load and failure displacement of the joint under the tensile shear working condition through the multi-regression head optimized by the same variance uncertainty loss. The method has the advantages of low prediction cost, high prediction efficiency, accurate precision and the like.

The invention relates to a bridge deck pavement layer recessive disease nondestructive testing method and system. The method comprises the following steps: determining an interfered coefficient of a corresponding frame of infrared image according to a light change coefficient at each moment, a vehicle speed at a corresponding moment and a distribution dispersion of edge lines in the corresponding frame of infrared image; according to the interference coefficient in each constant-speed time period and the vehicle speed in the constant-speed time period, determining an inclusion coefficient of each constant-speed time period; determining a strain coefficient of each speed change time period according to the plurality of light change coefficients, the vehicle speed variation and the duration of the speed change time period in each speed change time period, and determining a light interference coefficient of the target moment according to the plurality of containing coefficients and the plurality of strain coefficients; and determining the vehicle speed of the next moment based on the light interference coefficient of the target moment, the average speed of the vehicle in the driving process and the driven distance of the vehicle. According to the method, the influence of ambient light fluctuation on the infrared image acquisition precision can be effectively inhibited, and the detection accuracy and reliability of the bridge deck pavement layer recessive diseases are enhanced.

This invention discloses an online elevator wire rope inspector and its non-destructive testing system and method. It belongs to the field of elevator equipment operation and maintenance technology. The online elevator wire rope inspector includes: a main body and a detection probe; the main body includes a main housing, inside which a main control board is installed, and an alloy cover plate is installed between the main control board and the main housing; a clamping mechanism is installed outside the main housing to fix the main housing to the traction machine steel beam; the detection probe has a single-sided open probe housing, inside which an amorphous wire sensor is installed, with the detection surface of the amorphous wire sensor facing the open surface of the probe housing; the main housing and the probe housing are connected by a metal gooseneck tube, and the main control board collects the magnetic field strength signal detected by the amorphous wire sensor. This invention uses a weak magnetic excitation sensor as the detection element, which can accurately detect wire rope defects and realize real-time monitoring and intelligent management.

The invention belongs to the technical field of nondestructive testing, and particularly relates to cable protection pipe intelligent nondestructive testing equipment which comprises a base, a plurality of Y-shaped supports are fixedly mounted at the top of the base, a cable protection pipe body is mounted at the tops of the Y-shaped supports, and N-shaped frames are fixedly mounted at the tops of the two sides of the base. A control panel is fixedly mounted on one side of the N-shaped frame, a rectangular plate is slidably connected to the bottom of the N-shaped frame, an arc detection device is fixedly mounted at the center of the bottom of the rectangular plate, a cleaning frame is fixedly mounted at one end of the bottom of the rectangular plate, and a marking frame is fixedly mounted at the end, away from the cleaning frame, of the rectangular plate. In the detection process, the surface of the cable protection pipe can be preprocessed in advance, interference of surface stains on detection signals is eliminated, it is ensured that the detection device can accurately receive signals reflecting the real condition of the cable protection pipe, and the use safety of the cable protection pipe is guaranteed.

The invention discloses a reflective pumping detection nondestructive testing device and method capable of saturatively absorbing uniformity in a mirror surface. The device is based on a wavelength degeneracy pumping-detection principle, and comprises a femtosecond laser source, a beam splitter, an optical delay line, a double-frequency optical chopper, a two-dimensional precision translation stage, a coaxial focusing system, a spatial filtering diaphragm arranged in a reflection light path, a photoelectric detector, a lock-in amplifier and a signal processing unit. According to the method, different point positions of a sample are accurately positioned through a two-dimensional translation stage, a nonlinear differential reflectance dynamic curve of each point is measured under low power, the maximum differential reflectance and the carrier lifetime are extracted as characteristic parameters, the spatial relative standard deviation of the characteristic parameters is calculated, and lossless and quantitative in-plane uniformity evaluation is realized. According to the method, the interference of the pump light is effectively filtered through the space filtering diaphragm, the signal-to-noise ratio is remarkably improved in combination with the phase-locked amplification technology, and the problem that the nonlinear optical performance uniformity of the saturable absorber mirror cannot be quantitatively evaluated through a traditional method is solved.

This invention belongs to the field of pipe testing and discloses an automatic pipe wall thickness detection device and method. The detection device includes a frame, a clamping and rotating mechanism, a horizontal moving mechanism, a spring clamping mechanism, and a Hall effect measuring mechanism. The clamping and rotating mechanism is mounted on the frame and is used to clamp the pipe to be tested and drive it to rotate circumferentially. The horizontal moving mechanism is movably mounted on the frame along the length of the pipe to be tested and is located below the clamping and rotating mechanism. The spring clamping mechanism is mounted on the horizontal moving mechanism. The Hall effect measuring mechanism includes a steel ball, a measuring rod, and a main unit. The steel ball is placed inside the pipe to be tested. The measuring rod is electrically connected to the main unit and is mounted on the spring clamping mechanism with its head abutting against the bottom of the pipe to be tested, used to measure the distance between the head and the steel ball placed inside the pipe. The main unit is fixedly connected to the horizontal moving mechanism. This invention is particularly effective for non-destructive testing of the wall thickness of sintered plastic pipes containing micropores.

This utility model discloses an imaging plate assembly for X-ray flaw detection of four-split conductors in power transmission lines, including a base plate, two flip-up wing plates, and a drive assembly for simultaneously flipping the two flip-up wing plates. The two flip-up wing plates are symmetrically arranged on both sides of the base plate. The top of each flip-up wing plate is hinged to the top of the base plate via a pivot. Two bearing seats are provided on the top of each of the two sides of the base plate, and the pivot passes through these bearing seats for rotational support. The flip-up wing plates are fixedly sleeved on the shafts of the pivot located on the bearing seats. This utility model uses a U-shaped linkage plate to connect the two drive plates, and a single power source enables the synchronous unfolding and retraction of the two flip-up wing plates. When the two flip-up wing plates are unfolded, they can be placed on two parallel split conductors, allowing for non-destructive testing of power transmission line fittings in conjunction with an X-ray machine.

The application relates to the technical field of nondestructive testing, in particular to a nondestructive testing system based on digital ray CR technology, which comprises a base, the top end of the base is fixedly connected with a socket and a placing seat on the two sides, respectively, an annular slot is formed in one end of the socket, the annular slot and the placing seat are used for placing an inclined pipe and an arc-shaped pipe, a circulating detection mechanism is arranged on the outer side of the inclined pipe corresponding to the top end of the base, and a positioning and clamping mechanism and a cooling mechanism are arranged on the outer side of the placing seat corresponding to the top end of the base, respectively; the circulating detection mechanism comprises L-shaped rods fixedly connected on the two sides of the top end of the base, a special-shaped ring is fixedly connected between the two L-shaped rods, a special-shaped ring column is fixedly connected to the inner wall of the special-shaped ring, and a special-shaped groove is formed in the inner wall of the special-shaped ring column; the detection probe can move around the weld, so that the nondestructive detection operation on the weld can be continuously carried out, manual operation is not needed, and therefore the detection efficiency can be improved.

1. A borescope inspection device comprising: a probe for capturing images of at least a portion of an environment surrounding the probe, display means for displaying images captured by the probe, and an insertion tube connected to the probe and the display means, the insertion tube comprising coupling means extending through the insertion tube and configured to transmit images captured by the probe to the display means, 2. A borescope inspection device comprising: a probe for capturing images of at least a portion of an environment surrounding the probe, display means for displaying images captured by the probe, and an insertion tube coupled to the probe and the display means, the insertion tube comprising coupling means extending through the insertion tube and configured to transmit images captured by the probe to the display means, 3. A borescope inspection device comprising: a probe for capturing images of at least a portion of an environment surrounding the probe, the insertion tube comprising coupling means extending through the insertion tube and configured to transmit images captured by the probe to the display means, the insertion tube further comprising a photonic spectrometer for generating spectroscopic data of at least a portion of the environment surrounding the probe for display by the display means.

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 relates to the technical field of non-destructive testing, and discloses a gantry structure five-axis water immersion ultrasonic non-destructive testing scanning device which comprises a machine base used for providing support; the water tank is used for accommodating a to-be-detected workpiece and coupling water; the motion control box is used for providing a driving control signal for the moving part; the gantry type movement mechanism moves in the X-axis direction and the Y-axis direction of the machine base. The five-axis linkage scanning mechanism is used for adjusting the spatial attitude of the water immersion ultrasonic probe; the water immersion ultrasonic probe is located at the end, facing the water tank, of the five-axis linkage scanning mechanism and immersed in coupling water during detection, and propagation of ultrasonic waves in a workpiece is achieved through water coupling. And the motion control box is in electric control connection with the gantry type motion mechanism and the five-axis linkage scanning mechanism. Mechanical motion posture adjustment is achieved through the five-axis linkage scanning mechanism, a detection blind area caused by a complex curved surface can be eliminated by means of rotation of the A axis and the C axis, and scanning efficiency can be improved by means of multi-axis coordination action.

The application is a kind of metal cylinder segment surface coating nondestructive testing device, characterized in that it comprises Z-direction lifting mechanism (12), X-direction adjusting mechanism (14), rotating material changing mechanism (8), ultrasonic detection probe assembly (4), control electric cabinet box (10) and profile frame (16); the profile frame (16) has base (162) and vertical frame (161); the rotating material changing mechanism (8) is installed on the middle of the upper surface of the base (162); the X-direction adjusting mechanism (14) is installed on the horizontal plane of the upper surface of the vertical frame (161); the Z-direction lifting mechanism (12) is installed on the X-direction adjusting mechanism (14); the ultrasonic detection probe assembly (4) is installed on the lifting support (2) of the Z-direction lifting mechanism (12); the control electric cabinet box (10) is installed outside the vertical frame (161); the application realizes the scanning of the axial direction of the metal cylinder segment surface coating through the lifting function of the Z-direction lifting mechanism.

This utility model relates to the field of fresh produce transportation technology, and in particular to a non-destructive testing and sorting conveyor belt. It includes a carrying component comprising a frame, a drive shaft disposed inside the frame, and a conveyor belt disposed on the outer surface of the drive shaft; a sorting component comprising push plates linearly arranged on the outer side of the conveyor belt; and a feeding component comprising a feeding bin installed at a position corresponding to the conveyor belt and a feeding plate disposed inside the feeding bin. The carrying component also includes a support frame integrally formed at the bottom of the frame. This utility model ensures the rigid support of the entire device through the carrying component, utilizes multiple sets of designed sorting components to sort and feed fresh produce of different sizes, and coordinates with the corresponding feeding components to collect the fresh produce. Simultaneously, the feeding components have a certain buffering effect to ensure that the fresh produce is not damaged during the feeding process, thereby achieving the classified transportation of fresh produce.

A method of non-linear acoustic non-destructive testing of a testpiece (3) comprising (i) determining a resonance frequency of a testpiece (3) by applying at least one excitation vibration to the testpiece (3) and analysing a vibrational response of the testpiece (3) to the at least one excitation vibration, (ii) applying at least one excitation vibration to the testpiece (3) at the determined resonance frequency and / or over a range of frequencies that includes the determined resonance frequency, and (iii) determining if the testpiece (3) has one or more flaws by analysing a vibrational response of the testpiece, to the at least one excitation vibration in step (ii), for non-linear behaviour. An apparatus (1) for non-linear acoustic non-destructive testing of a testpiece (3) according to the method.

The application provides a composite sensor and a detection method for pipeline nondestructive testing, relates to the technical field of pipeline nondestructive testing, and comprises a magnetic base of a cylindrical structure; the magnetic base comprises a circular ring part and a center part; an electromagnetic ultrasonic coil; the electromagnetic ultrasonic coil comprises a first coil and a second coil which are interlaced and wound; a plurality of Hall elements are uniformly arranged in the circumferential direction with the center part as the center; and a controller is configured to generate a first control signal based on a magnetic flux leakage signal, to form a target excitation circuit based on the electromagnetic ultrasonic coil, to make the target excitation circuit form electromagnetic ultrasonic waves for detecting a pipeline to be detected, to obtain an ultrasonic echo based on the target excitation circuit, and to generate a detection result according to the magnetic flux leakage signal and the ultrasonic echo. The application realizes omnidirectional magnetic flux leakage detection through the annular magnet structure matched with the circumferentially arranged Hall elements; and through the specific combination of the coil connection mode and the timing control logic, various electromagnetic ultrasonic detection modes can be considered.