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3397 results about "Nondestructive testing" patented technology

Nondestructive testing (NDT) is a wide group of analysis techniques used in science and technology industry to evaluate the properties of a material, component or system without causing damage. The terms nondestructive examination (NDE), nondestructive inspection (NDI), and nondestructive evaluation (NDE) are also commonly used to describe this technology. Because NDT does not permanently alter the article being inspected, it is a highly valuable technique that can save both money and time in product evaluation, troubleshooting, and research. The six most frequently used NDT methods are eddy-current, magnetic-particle, liquid penetrant, radiographic, ultrasonic, and visual testing. NDT is commonly used in forensic engineering, mechanical engineering, petroleum engineering, electrical engineering, civil engineering, systems engineering, aeronautical engineering, medicine, and art. Innovations in the field of nondestructive testing have had a profound impact on medical imaging, including on echocardiography, medical ultrasonography, and digital radiography.

Nondestructive ceramic detection device and detection method thereof

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.

Numerically controlled drilling and milling processing method for runner of blisk of engine

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.

Method and apparatus for nondestructively testing food synthetic quality

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.

Large caliber aluminium alloy pipeline non-pad tungsten electrode argon arc single face welding and double face shaping method

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.

Supporting type pipeline inside detection robot with flexibility self-adapting function

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.

Infrared lock-in thermal wave non-destructive detection method based on image sequence processing

InactiveCN102033081AGuaranteed to be clearly visibleShort Spectral Power DistributionMaterial flaws investigationData acquisitionFunction generator
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.

Nondestructive detecting and screening method based on near-infrared for crop single-grain components

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.

Method for non-linear ultrasonic online detection of early fatigue damage to metal material

InactiveCN101806778ARealize the whole process of fatigue detectionSolve misjudgmentMaterial analysis using acoustic emission techniquesFatigue damageSonification
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.

Fast checking method for pipe defect and nondestructive testing apparatus

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.

Cement concrete road surface void identification and high polymer grouting rapid servicing technology

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.

Dual Robot Detection Apparatus For Non-Damage Detection

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.
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