3397 results about "Nondestructive testing" patented technology

An anomaly detection method includes acquiring image data corresponding to nondestructive testing (NDT) of a scanned object. The NDT image data comprises at least one inspection test image of the scanned object and multiple reference images for the scanned object. The anomaly detection method further includes generating an anomaly detection model based on a statistical analysis of one or more image features in the reference images for the scanned object and identifying one or more defects in the inspection test image, based on the anomaly detection model.

A method for the nondestructive testing of pipeline, and internal or external coatings, using guided ultrasonic waves excited from the inside or outside diameter, wherein at least two transducers are employed to send and receive ultrasound, wherein a data normalization scheme is employed to account for transducer variability, and wherein the hardware arrangement has a number of pulser channels and a number of receiver channels for the collection and storage of signals.

The invention discloses a high clear weld ultrasound imaging undamaged detection method and detection system, firstly dong point by point scanning with leach focusing probe to welding seam, and sampling detecting signal of ultrasound reflect echo for every bit, composing the ultrasonic scanning image of welding line section, and then realizing to rebuild super-resolution of image by gathering tiny scanning image and multigraph rebuilding super-resolution image. The invention can breach resolution limited of existing equipment of ultrasound imaging, it improves greatly recognizability of equipment of ultrasound imaging for the small bug of welding line by multi-framing rebuilding high resolution and high quality image from fall quality image in the scene.

Methods are disclosed for nondestructive testing and measuring the structural health of prestressed concrete structures, such as slabs, columns, girders, bridges, towers, elevated storage tanks, silos, cooling towers, wind power generation towers, liquefied gas storage tanks, nuclear power containment buildings, and the like. Measurements are made as the structure undergoes tensioning and detensioning operations. By measuring actual movements of cardinal points on the structure, in an absolute three-dimensional coordinate system, and comparing the measurements to a model—as tension on a tendon is changed—a margin of safety is assured. High accuracy measurements are made by electronic distance measurement (EDM) instruments over hundreds of meters, which yield coordinates of cardinal points with an uncertainty of the order of one part per million. The methods are proposed as possible alternatives to prior failures of post-tensioned concrete, including the Las Lomas Bridge, the Kapiolani Interchange On-Ramp, Turkey Point Unit 3 Nuclear Power Plant, and Crystal River Unit 3 Nuclear Power Plant. An extensive review of the most closely related prior arts is included.

A method for detecting breaks in a prestressed wire, rod or bar embedded in concrete surrounding a metal pipe is described. A remote field eddy current probe is traversed axially internally through the pipe so as to create an energy flow path externally of the pipe and a transformer coupling through the pipe, and generate a signal in a detector coil axially spaced from an exciter coil. As the exciter coil traverses the wire, rod or bar containing the break a signal change is generated, regardless of the radial position of the detector coil relative to the break.

The invention relates to pipeline defect ultrasound guided wave time reversal detection device and method. The method includes the following steps: selecting detecting frequency according to the detected pipeline corresponding free hollow column structure group velocity dispersion curve; inputting the frequency into the arbitrary function generator to generate center frequency used as single sound signal; sending the signal to each passage of exciting/receiving set to transducer unit; exciting longitudinal axis symmetry guided wave modal; sending the reflected signal to the computer and gaining reversal excitation signal by time reversal; repeatedly exciting guided signal to detect. The invention realize space and time focus for guided wave detection, greatly improve detection capability for little defect.

The invention discloses a nondestructive ceramic detection device and a detection method thereof. The detection device comprises a rack and an engine cover, wherein the engine cover stretches across the middle of the rack in a portal frame mode; a driving wheel and a driven wheel are respectively mounted at two ends of the rack; a motor is arranged on a framework on one side of the rack; the driving wheel is connected with the motor through a synchronous belt; a fan is mounted on one transverse side of the engine cover; a control cabinet is mounted on one vertical side of the engine cover; the lower half part of the control cabinet is of cabinet type; a detection host is arranged in the cabinet; a linear CCD (Charge Coupled Device) camera is arranged on a first cross beam in the engine cover; a linear light source is arranged under the linear CCD camera; a plurality of laser displacement sensors are arranged on a second cross beam of the engine cover. The detection device is simple in structure, convenient to maintain and capable of effectively avoiding artificial detection error; meanwhile, according to the detection method, the detection process is simple and quick, the detection result is accurate and the detection efficiency is high.

A system and method for identifying defects in a workpiece are provided. The system includes a sensor for non-destructive testing. The system also includes a movable arm carrying the sensor and being pivotally attached to a base. The movable arm includes at least one pivotable joint between the base and the sensor, and is capable of being moved such that the sensor acquires data indicative of a workpiece as the sensor travels proximate to the workpiece. A data acquisition system is capable of communicating with the sensor to create an image of at least a portion of the workpiece based on the data acquired by the sensor.

The invention provides a numerically controlled drilling and milling processing method for a runner of a blisk of an engine. The main technical flow before drilling and milling the runner comprises the following steps: lathing each surface of a blank, performing nondestructive testing, lathing inner and outer cavities of the blisk, finely milling a needed periphery and an axial benchmark, drilling and boring an angular datum hole, drilling and milling the runner and inspecting. A part and a fixture are in peripheral seam allowance fit to limit a radial degree of freedom of the part; an end face gland and a central pull bar axially limit an axial degree of freedom of the part; and a precise positioning pin angularly limits an angular degree of freedom of the part. The method has the advantages that: by applying the drilling and milling processing method to a part machining process of the blisk of the engine having the material removing rate of over 90 percent, the method improves the processing efficiency, shortens the manufacturing period of the product, and provides a new technical means for removing a large amount of remainder materials of the blisk; and the processing of a high-temperature alloy, a titanium alloy and other difficult-to-process materials shows that the material is more difficult to process, the removing rate is bigger and the effect is more obvious.

Inventions relate to scintillation substances and they may be utilized in nuclear physics, medicine and oil industry for recording and measurements of X-ray, gamma-ray and alpha-ray, nondestructive testing of solid states structure, three-dimensional positron-emission tomography and X-ray computer tomography and fluorography. Substances based on silicate comprising lutetium and cerium characterised in that compositions of substances are represented by chemical formulae Ce_xLu_2+2y−xSi_1−yO_5+y, Ce_xLi_q+pLu_{2−p+2y−x−z}A_zSi_1−yO_5+y−p, Ce_xLi_q+pLu_{9.33−x−p−z}□_0.67A_zSi₆O_26−p, where A is at least one element selected from group consisting of Gd, Sc, Y, La, Eu, Tb, x is value between 1×10⁻⁴ f.units and 0.02 f.units., y is value between 0.024 f.units and 0.09 f.units, z is value does not exceeding 0.05 f.units, q is value does not exceeding 0.2 f.units, p is value does not exceeding 0.05 f.units. Achievable technical result is the scintillating substance having high density, high light yield, low afterglow, and low percentage loss during fabrication of scintillating elements.

This invention relates to a method and apparatus for non-destructive testing of fruit internal quality based on optical properties. The device comprises a send unit, an analysis and process unit to evaluate the fruit referred to a stored quality prediction model, a signal control unit to send the fruit position and size information to the detection system with command format, an illumination system to provide stable and optimal-strength light, a detection system to obtain and send the transmitted spectrum information for fruit inner quality to the analysis and process unit, a fruit grade-outlet, a size detection device, and a coder. This invention improves on-line detection speed and precision.

The invention discloses a non-destructive inspection method for the comprehensive quality of food and a device thereof, wherein image information reflecting characteristics of an inspected object, such as color, texture, size and shape, etc. is acquired by a machine vision system, and spectral information reflecting physical and chemical indexes of the sample such as moisture, sugar, protein, lipid and PH value, etc. is obtained by a spectrographic detection system, and the acquired image information and the spectral information undergo the preprocessing on the data layer and the information integration on the characteristic layer or the decision layer; together with a built food classification grading expert system, the quality of the inspection object is comprehensively graded. The invention comprehensively utilizes the light image information and the spectral information to inspect the appearance and inner quality of food, thereby the invention can make a quick, convenient, non-destructive and objective inspection on the comprehensive quality of food; the method and the device are widely used to classify food materials, monitor the food processing and grade the food, etc., which ensures the quality of food and contributes to the good quality and low price of food.

The invention provides a microinjection apparatus for a fluid. The microinjection apparatus includes a substrate, a manifold, a fluid chamber, a dummy chamber, a detecting device, and a pair of parallel conductive plates. The manifold is formed on the substrate and supplies the fluid chamber and the dummy chamber, also formed on the substrate, with the fluid. In addition, the pair of parallel conductive plates are formed on a pair of opposite inner walls of the dummy chamber, and electrically connected to the detecting device. By applying the pair of parallel conductive plates and the detecting device provided in the invention, the size of the fluid chamber and the fluid-filled condition relative to the fluid chamber can be indirectly detected by non-destructive testing. Furthermore, the cost of and the time of testing also can be prominently saved.

The invention discloses a method for large-calibre aluminium-alloy pipeline no-liner tungsten electrode argon arc one-side welding both-side formation, comprising the following steps of: assembling of groove angle and clearance, grinding of tungsten electrode, cleaning before welding, adjusting welding process parameters, tack welding, and welding of a bottom coating, a filling layer and a covering layer. The pipe is horizontally fixed and the position is marked by hour; the welding sequence is left half-ring and right half-ring; each half-ring comprises overhead welding, vertical position welding and downhand welding; the welding is started at a position where L is equal to 5-10mm close to six of the overhead welding; the vertical position welding is then carried out; finally, the front half-ring is ended at 12 of the downhand welding; before the rear half-ring starts welding, the connection is grinded as a slope; the welding seam formed by the connection and the front half-ring welding position is overlapped by 3-5mm; the welding of the rear half-ring is started from 6 of the overhead welding and ended at 12 of the downhand welding through the vertical position welding; the welding is carried out by a continuous feeding method. The surface of the welding seam of the method has no pores or cracks, is completely welded and beautiful, and has good internal and external forming; by the non-destructive testing, the first-time qualification rate achieves 100%, the welding seam achieves the class-1 quality, the construction procedures are reduced, and the construction cost is reduced.

A method for the nondestructive testing of a test object by ultrasound is provided, the method including generating a pulsed ultrasonic field in the test object by means of an array of individually drivable ultrasonic transmitting transducers acoustically coupled to the test object. The ultrasonic transmitting transducers are each driven with a specific analog transient excitation signal, wherein each analog transient excitation signal is generated based on an ultrasonic transmitting transducer-specific stored digital transient excitation function. The method further includes receiving resulting echo signals from the test object by means of an array of individually drivable ultrasonic receiving transducers, with each ultrasonic receiving transducer providing an analog time-resolved echo signal, temporarily storing the time-resolved, transducer-specific, digitized echo signals in the form of an echo signal set, and applying a plurality of different reception processing rules to the echo signal set.

The invention discloses a supporting type pipeline inside detection robot with the flexibility self-adapting function. The supporting type pipeline inside detection robot comprises a flexibility self-adapting supporting mechanism, a driving mechanism, a detection mechanism and a camera shooting mechanism. The camera shooting mechanism is installed at the front end of the flexibility self-adapting supporting mechanism. The flexibility self-adapting supporting mechanism is connected with the driving mechanism and used for guaranteeing that the robot has the capacity of automatically adapting to a reducer pipe or obstacles or bent pipes when the robot moves in a pipeline. The detection mechanism is installed on the driving mechanism, and when the robot conducts detection work in the pipeline, a probe part in the detection mechanism completely makes contact with the inner wall of the pipeline. Flexibility self-adapting of the robot to the pipeline and modularization of the supporting type pipeline inside robot are achieved, the walking capacity of the robot in the pipeline is enhanced, and overhauls of the robot are also facilitated. Meanwhile, the purpose that nondestructive testing equipment is carried on the pipeline inside detection robot is achieved, and therefore the detection capacity for the fault pipeline is improved.

The invention discloses a bridgehead vehicle bump prevention and control high polymer grouting technique and a construction method thereof. Aiming at the problems of bridgehead butt strap gapping and sinking problems, nondestructive detection systems of a ground penetrating radar (GPR), a falling weight deflectometer (FWD), a laser level and the like are comprehensively applied to detection and monitoring; and a high polymer material is injected to the bottom of a bridgehead butt strap or the bottom of a sleeper beam, the volume of the material is quickly expanded and the material is cured after chemical reaction, so that the gapped butt strap is quickly filled and raised, the roadbed is reinforced, and bridgehead vehicle bump is radically prevented and controlled. Compared with the conventional treatment method, the technique has obvious innovation on the aspects of technical principles and construction methods, has the characteristics of good durability, short construction period, strong pertinence and the like, and initiates a new advanced, efficient, economic and practical bridgehead bump prevention and control path.

The invention discloses a modeling method of a soil heavy metal content detection model and the application thereof. The modeling method includes the steps of collecting a soil sample, collecting the X-ray fluorescence spectrum of the sample, measuring the reference value of heavy metal element content to be measured in the soil sample, and establishing the correcting relation between the X-ray fluorescence spectrum and the reference value of heavy metal element content. The method can simultaneously perform rapid nondestructive examination to various heavy metal element contents of soil, has wide range of application and high universality and provides a technological base for the on-site detection of farmland soil heavy metal pollution.

Some sample of relevant food is estimated by some professionals with their sensory organ or tested through conventional physical and chemical analysis to establish correlative data base. Some other sample is determined with sensor array through carrying the smell of the food to the sensor array reaction chamber via carrier gas, amplifying and filtering the signal from the sensor array, A/D conversion in A/D converter and data processing in computer. The result of computer processing is related with those in the established data base and one knowledge library is obtained through learning forthe determination of truth and quality of tested sample. The said method is fast and simple, needs no pre-treatment of the sample and organic solvent extraction, and has the artificial intelligent identification to unknown sample. The present invention facilitates the physical and chemical analysis of food products.

The invention discloses an infrared lock-in heat wave non-destructive detection method based on image sequence processing, which is a new method for realizing infrared lock-in heat wave non-destructive detection by using computer software to process the sequence of infrared images. The method comprises the following implementation steps: using a focal plane infrared heat imager to collect the image sequence of heat wave signals, using a halogen light source modulated by sine law to excite, carrying out digital lock-in processing on heat wave signals and analysis of feature images. When the method is used for non-destructive detection, the focal plane infrared heat imager 5 is fixed on a tripod 16 and connected with a data acquisition card of a computer 11, and infrared lock-in processing software 12 based on the image sequence is used for finishing initialization and image display of the infrared heat imager. The halogen light source 6 is fixed on a special support 7 to ensure that incident light is irradiated in an area to be detected of a sample piece 2 as far as possible, a function generator 14 is connected with a light source power amplifier 13 through a signal wire 15, and light intensity of the halogen light source 6 is controlled to change by the sine law. The incident light of the halogen light source 6 is irradiated to the surface of the sample piece 2 to generate excited heat waves 4. The infrared lock-in processing software 12 based on the image sequence records reflected heat waves 3 or transmitted heat waves 1 generated on the surface of the sample piece 2, a lock-in processing module is used for extracting feature information of the heat wave signals and forming the feature images, an image processing and analyzing module processes and analyzes the heat wave feature images, and inner defect features of the sample piece 2 are extracted, so as to realize fast and accurate non-destructive detection of inner defects and damages of the sample piece 2.

A method and apparatus (10) is provided which employs phase or amplitude modulated electromagnetic probing waves (20) (in optical or microwave frequency ranges or both) emitted toward a vibrating object (8). The optical and/or microwave probing signals (20) remotely irradiate an object (8) of interest. The object (8) reflects and/or scatters the probing wave (20) toward a receiver (22). The reflected/scattered modulated signal (24) is received with a remote sensor (receiver) (22). Vibration causes additional phase modulation to the probing wave (20). At the receiving end, the signal is demodulated to extract and analyze the vibration waveform (26,28). The present invention can be utilized for nondestructive testing, monitoring of technological processes, structural integrity, noise and vibration control, mine detection, etc.

The invention relates to a nondestructive detecting and screening method based on near-infrared for crop single-grain components, and the method comprises the following steps: acquiring a database for single-grain components of different materials, by utilizing a known ration detection process for the chemical components of crop single-grain; collecting near-infrared spectrum information of the known single-grain component materials; establishing a component identifying model corresponding to the single-grain component and the near-infrared spectrum information; and in the detection process, detecting the spectrum of a to-be-detected sample firstly, and then comparing with the identifying model and analyzing so as to acquire the component of the to-be-detected sample, and lastly automatically screening. The high-throughput nondestructive detection on chemical matters and chemical pollutants is realized on the basis of single-grain level, wherein the chemical matters contain starch, protein, fat, and the like. The method can be used for nondestructively selecting mutant and genetic segregation groups and detecting pollutants, thereby supplying a new method for ensuring the safety of crop heredity breading and the safety of agricultural products.

A method for the non-linear ultrasonic online detection of early fatigue damage to a metal material belongs to the field of nondestructive detection. The method comprises the following steps: determining an excitation signal parameter according to the thickness of a tested piece and inputting the parameter to an arbitrary function generator to generate a sound signal; determining a threshold value of an acoustic emission instrument according to the amplitude of a no-load noise signal; performing fatigue loading on the tested piece, continuously detecting an acoustic emission signal in real time with an acoustic emission sensor, amplifying the acoustic emission signal, inputting the acoustic emission signal into the acoustic emission instrument, and judging ring with the acoustic emission instrument when the amplitude of the acoustic emission signal exceeds the preset the threshold value of the acoustic emission instrument; detecting a non-linear ultrasonic signal at equal time interval if the acoustic emission instrument does not display the ring or the times of the continuous ring is not more than an empirical value; and stopping detection if the displayed ring times is more than the empirical value, because fatigue cracks are generated and develop. On the basis of non-linear ultrasonic nondestructive detection, the method of the invention introduces acoustic emission technique, so the method does not make incorrect judgment when detecting the early fatigue damage to the metal material and realizes continuous online detection.

The invention discloses a nondestructive testing method and a nondestructive testing device for nitrogen and water of crops, and relates to the technical field of crop nutrient diagnosis. The device is characterized by comprising a multisensor information acquisition device, a portable computer, a sensor detecting frame and an instrument container, wherein an infrared temperature measuring sensor, an irradiance sensor and a temperature and humidity sensor are connected with a data acquisition card through a signal cable; the data acquisition card, two digital industrial view cameras and an input end of a power supply module are connected with the portable computer through a USB bus; the power supply module boosts the voltage of a USB to DC24V for supplying power to the sensors; the sensordetecting frame can adjust the height according to the crops; multisensor information is uploaded to the portable computer; and the visible light and the near infrared image features of a plant canopy are extracted, canopy temperature and illumination information are merged, an environment error is eliminated, and the nitrogen and the water of the field crops can be rapidly and nondestructively detected on line.

The invention relates to a fast scanning method of pipeline drawbacks and a non-destructive detection device, which is more particularly suitable for fast scanning and non-destructive detection of drawbacks of the pipelines with insulation. The invention is composed of a guided wave sensor, a transmitting module, a receiving module, a signal generating module, a power amplifying module, a signal processing module, an A/D conversion module and an built-in computer system. The invention is suitable for comprehensive detection of drawbacks of pipelines with different diameters, detection of long distance pipelines, and detection of pipelines in inaccessible places. The invention has the advantages of fast and large-scale detection ability without contact, high efficiency; overcoming a plurality of limitations of the conventional non-destructive detection method; overcoming the restriction conditions of oil pollution, fouling, bending or heat insulation protective layer, judging and locating the drawbacks of the pipelines, reducing the maintenance range, avoiding unnecessary disassembly and replacement, reducing the intensity of artificial detection, and saving the human and material resource. In addition, the invention can achieve on-line monitoring, and evaluate the health condition of the element or predicts the service life of the element.

The invention discloses a cement concrete pavement detachment identification and polymer grouting fast maintenance technology, which utilizes a falling weight deflectometer (FWD) and a ground penetrating radar (GPR) to detect and evaluate the performance of the pavement, identify the detachment situation of pavement slabs and realize the lossless and fast identification of the cement concrete pavement detachment. A grouting hole is perforated on the pavement slabs that need detachment treatment and polymeric materials are injected into the hole to repair the pavement. The maintenance technology has the advantages of speedy construction, good durability, strong pertinence and excellent waterproof performance of the injected polymeric materials, which not only saves a large amount of funds and construction periods and avoids the adverse social effects caused by long affected traffic, but also is beneficial to environmental protection and resources-saving. The cement concrete pavement detachment identification and polymer grouting fast maintenance technology of the invention integrates detachment identification lossless detection technology such as the FWD and the GPR, etc. with the polymer grouting fast maintenance technology, thus providing a whole set of advanced, efficient, economical and practical technology for detecting and maintaining the cement concrete pavement detachment.

Disclosed is a twin-robot testing apparatus for non-destructive testing. The apparatus comprises two robots (1) for detecting a workpiece (3) from front and back sides thereof; a water circulating unit, comprising a pressure pump, two water ejection coupling probes (2) and water pipes, for providing a coupled water column; an ultrasonic transmitting/receiving device, comprising two ultrasonic transducers, a pulse transmitting/receiving card, and a high-speed data acquisition card, wherein the two ultrasonic transducers are respectively attached at the end-effector of the two robots (1), for transmitting ultrasound and receiving ultrasound respectively, the ultrasonic pulse transmitting/receiving card and the high-speed data acquisition card are mounted on the robot controller mechanism for transmitting and receiving, and acquiring pulse signals, the two robots perform a synchronous transmission testing, with ultrasound transmitted by one robot being received by the other robot, and the ultrasonic transducers are adjusted in position and gesture with the change in the surface shape of the workpiece (3) such that the incidence direction of ultrasonic beam is always in coincidence with the normal direction of the curved surface. The apparatus is used for automatic non-destructive testing of a curved-surface workpiece made of a composite material, and can improve the accuracy, sensitivity and efficiency of the testing.

The invention relates to automation on-line no-wear detection grading equipment for red dates, and particularly discloses a no-wear automatic red date grader based on a machine vision technology. The no-wear automatic red date grader comprises a machine vision system, the no-wear automatic red date grader is characterized by comprising a running roller convey chain plate device (2), wherein a feed end of the running roller convey chain plate device (2) is provided with a feeding hopper (1), and an illumination and CCD (charge-coupled device) camera unit (5) of the machine vision system is installed above the running roller convey chain plate device (2); one side of the running roller convey chain plate device (2) arranged in back of the illumination and CCD camera unit (5) is provided with a plurality of classifying conveying channels (8), and the other side of the running roller convey chain plate device (2) is provided with an actuating mechanism; and the actuating mechanism is connected with an industrial controller (4) of the machine vision system. The no-wear automatic red date grader based on the machine vision technology, provided by the invention, can recognize and classify the red date fruits according to comprehensive indexes of the size, the shape and the color.

The invention relates to a digital image reinforcing method based on wavelet reconstruction and decomposition and a device thereof, which belongs to the image data processing field. The digital image reinforcing method comprises image pretreatment, decomposition process, transformation process and reconstruction process, and is characterized in that the image decomposition process comprises multi-group integrals and down-sampling process; the transformation process comprises the statistics, analysis and modification processes of mid data information; the reconstruction process comprises multi-group up-sampling, integrals and adding processes; in the transformation process, adaptive histogram equalization technology and noise restraining are adopted. The invention, based on multi-scale analysis, realizes to reinforce the contrast of digital image and prevents noise simultaneously through the wavelet decomposition, transformation and reconstruction and adopting the adaptive histogram equalization technology and noise restraining in transform domain and can be widely used in such fields related to the improvement of digital image quality as medical information systems, industrial nondestructive testing systems and other similar image systems.

The invention belongs to the field of nondestructive detection, and particularly relates to a power station thick-walled pipeline ultrasonic guided wave detecting method, wherein the method comprises the following steps of: selecting an ultrasonic guided wave detecting probe; selecting an ultrasonic guided wave detecting instrument; manufacturing a sensitivity test block; making a distance-amplitude curve; scanning; carrying out flaw size measurement; and verifying and grading detecting results. The detecting method is suitable for comprehensively detecting the flaws of pipelines with different pipe diameters and thicknesses, and is particularly suitable for comprehensively detecting power station thick-walled pipelines. The detecting method has the characteristics of rapidness, simpleness, safety and reliability, can overcome some limitations of a conventional nondestructive detection method, lowers the manual detection intensity and saves human and material resources.