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32results about How to "Novel detection method" patented technology
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Detection method for mineral oil in sludge
InactiveCN102608053AAccurate measurementFacilitate guidance and disposalPreparing sample for investigationColor/spectral properties measurementsSingle sampleSludge
The invention relates to a detection method for mineral oil in sludge, which comprises the following steps of: preparing a group of standard samples in different concentrations, entering the concentration of each standard sample to a computer, determining absorbance of all of the standard samples in sequence on an ultraviolet spectrophotometer, establishing a standard curve between the concentrations and the absorbance on the computer, taking a sludge sample for dryness, adding petroleum ether to dilute, putting the sludge sample into the ultraviolet spectrophotometer showing the absorbance of the sample after performing ultrasound and extraction by an ultrasonic instrument and metering constant volume, obtaining the concentration of the detected sample according to the standard curve, and calculating the concentration of the mineral oil in the sludge by using a formula at last. The detection method has the advantages that an ultrasound extraction technology is used to extract the mineral oil from the sludge sample sufficiently in a short time period in the detection method, the data is accurate, the time period is short, the operation is simple, the timeliness is realized, the total time for detecting a single sample does not exceed 3h, and the guidance of field sludge handling is facilitated.
Owner:BEIJING BBMG BEISHUI ENVIROMENTAL TECH CO LTD
System and method for measuring coplanarity of integrated circuit (IC) pins through multistage reflection and raster imaging
ActiveCN103308007ANovel detection methodEasy to measureUsing optical meansOptical pathIntegrated circuit
The invention discloses a system and a method for measuring the coplanarity of integrated circuit (IC) pins through multistage reflection and raster imaging. The system mainly comprises an IC chip dead load slant sliding feed mechanism, an external triggering synchronous control circuit, an IC chip pin imagingoptical path system, an image acquisition card and a personal computer (PC)-based intelligent visual inspection system. The IC chip pin imaging optical path system consists of two groups of mutually independent quasi-parallel blue-light light-emitting diode (LED) light sources, two rasters, and a plurality of reflectors and prisms which areorganically combined. A raster stripe images detected from the IC chip pins can be acquired throughthe imaging optical path system; and an image acquisition and analysis software system analyzes the images of the IC chip pins with raster stripes, evaluates the isometry of the pins in the images and the torsional characteristic of the raster stripes, and calculates a corresponding coplanarity error according to a corresponding f function mapping relation between a coplanarity error and the raster stripe curved degree. By the system and the method, two rows of pins of an IC chip are simultaneously imaged, the IC chip pins can be precisely detected through one-time imaging, the structure is compact, and the cost performance is high.
Owner:SOUTH CHINA UNIV OF TECH +1
Direction diagnosing system of grounded fault of small current grounded distribution system
ActiveCN102608483AEasy diagnosisEasy to installElectrical testingVoltage-current phase anglePower flowTransformer
The invention discloses a direction diagnosing system of grounded fault of a small current grounded distribution system, which adopts a high voltage electric display HS connected on a switch to replace a zero sequence voltage transformer PT to detect a capacitive voltage U. For the small current grounded distribution system, based on the capacitive voltage U, when one-phase ground fault occurs at the load side, the zero sequence current I0 leads the capacitive voltage U with the leading angle theta2 being 0-180 degrees; when single-phase ground fault occurs at the power supply side, the zero sequence current I0 lags behind the capacitive voltage U with the lag angle theta1 being 0-90 degrees. Therefore, by extraction and treatment of steady component of ground fault of a feed line, the capacitive voltage U and zero sequence current I0 when the system faults is further detected to judge the direction of one-phase ground fault. The ground fault direction signal picked up by the ground fault direction diagnosing system provided by the invention can inform a controller of a power distribution station so that the controller acts correspondingly to the benefit of protecting the power distribution system.
Owner:BEIHANG UNIV +1
Multi-target detection method based on a cascade hourglass neural network
ActiveCN109766887AImprove detection accuracyRun fastCharacter and pattern recognitionNeural architecturesMultiple targetEngineering
The invention provides a multi-target detection method based on a cascaded hourglass neural network, and aims to solve the technical problems that an existing detection method is too slow in speed anda small target is difficult to identify. The method comprises the following steps: step 1, collecting a training sample; step 2, building a deep learning framework and a backbone network cascade hourglass network of target detection; step 3, designing a label of the training sample as a confidence coefficient heat map; step 4, designing a loss function of the cascade hourglass network to optimizethe loss function; step 5, training the cascaded hourglass network to obtain a detection model; And step 6, multi-target detection. The method has the beneficial effects that various types of targetscan be quickly and accurately identified, and the small target identification capability is improved.
Owner:INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
Telemetry link on-line detecting system of scheduling automated system
InactiveCN101424721ANovel detection methodThe detection data is accurateTelephonic communicationFault locationProgram instructionHigh-level programming language
The invention relates to a telecontrol channel on-line detecting system of a scheduling automatic system, which comprises an analog channel detecting module, a digital channel detecting module and a network channel detecting module, and the output of the three detecting modules is input into a computer through a converting circuit. The invention aims at the problem of telecontrol detection with delay to provide the channel detecting system controlled by the computer, and the quality and the index of a telecontrol channel can be detected on line at any moment. The system detects an analog channel by a loop channel method, detects a digital channel by an accessory channel method and detects a network channel by a server landing method, and then, detecting results are collected to the computer, are controlled by a program instruction and are programmed by adopting high-level languages. The telecontrol channel on-line detecting system has the advantages of visual operation interface, simple and novel detecting method, accurate detecting date and high detecting speed and can complete fault detection in one minute.
Owner:JIANGSU ELECTRIC POWER CO
Medicine bottle liquid level detection method based on image processing
ActiveCN104819754AEliminate pixel biasMake up for deficienciesImage analysisMachines/enginesGreek letter betaImaging processing
The invention discloses a medicine bottle liquid level detection method based on image processing. The method includes the steps of collecting a typical medicine bottle image to establish a reference template image, establishing matching templates and coordinate systems of the matching templates, matching a plurality of collected image of a detected medicine bottle with the matching templates in a one-to-one mode to obtain a displacement matrix of the images of the detected medicine bottle obtaining a corrected image of the images of the detected medicine bottle through affine transformation, segmenting the corrected image to obtain detection areas, extracting liquid level strip shapes, obtaining the liquid level lowest point on the basis of the characteristics of the liquid level strip shapes, and judging the qualification of the medicine bottle according to the relation between the liquid level lowest point and the set liquid level lowest point threshold value alpha and the relation between the liquid level lowest point and the set highest threshold value beta. The method is rapid in detection speed, and the total processing time of all the images of liquid medicine of the single bottle is within 100 ms. The sub-pixel-level accuracy is achieved for detection, the pixel deviation caused by vibration of a mechanical platform is eliminated, and the detection accuracy is greatly improved.
Owner:SHANDONG UNIV
Machine vision based liquid level sub-quality product marking method
InactiveCN106052793AQuick checkSimple algorithmOptically investigating flaws/contaminationMachines/enginesMachine visionEnvironment effect
The invention relates to a machine vision based liquid level sub-quality product marking method. The method includes: placing a certain qualified glass bottle at a work station to be tested, acquiring a template for subsequent matching treatment; conveying a glass bottle to be tested to a shooting work station through a conveying belt, and shooting an image of the liquid level of the glass bottle to be tested; performing binarization processing on the image after pretreatment; matching a bottle cap by using a geometric matching method, and detecting a position of the bottle cap; establishing a coordinate system; setting an area-of-interest ROI of a liquid level qualified area; matching a liquid level line by using the geometric method; and determining a sub-quality glass bottle. The machine vision based liquid level sub-quality product marking method is simple in algorithm, is fewer in steps, can achieve rapid detection of images, is high in detection efficiency, cannot be affected by environments, and is high in accuracy rate.
Owner:TIANJIN UNIV
Bottle cap unqualified product marking method based on machine vision
InactiveCN105424722AQuick checkReduce the impactMaterial analysis by optical meansLower limitMachine vision
The invention relates to a bottle cap unqualified product marking method based on machine vision. The surface of a bottle cap to be tested is illuminated with an LED white annular light source, and the method includes the following steps that firstly, image information of qualified bottle caps is collected; secondly, an image of the bottle cap to be tested is collected; thirdly, the image preprocessed through median filter is subjected to binarization processing; fourthly, round locating is carried out, the edge of the bottle cap is found and serves as a round edge, and a coordinate system is built with the circle center as an original point; fifthly, the upper limit and the lower limit of the number of pixels of a detection target are preset according to the number of pixels of production date sprayed codes on the qualified bottle caps, the interior of a circle is set to be a region of interest (ROI) by means of the obtained round edge and the built coordinate system, the production date sprayed codes in the ROI serve as detection targets, and bottle cap detection is conducted; sixthly, unqualified products are marked. The algorithm which is used is simple, the number of steps is small, quick detection of images is achieved, detection efficiency is high, the method is little influenced by the environment, and accuracy is high.
Owner:TIANJIN UNIV
Preparation method and application of cobalt oxide/mesoporous carbon composite material electrochemical sensor
InactiveCN107228889AHigh sensitivityHigh selectivityMaterial electrochemical variablesLinear relationshipNanocomposite
The invention relates to the field of rapid detection of food safety and particularly relates to a preparation method and application of an electrochemical sensor based on a cobalt oxide / mesoporous carbon nanocomposite material and application of the electrochemical sensor in fast detection of nitrite content in a food. The preparation method of the electrochemical sensor comprises preparing a nanocomposite material carrying cobalt oxide particles and graphitized mesoporous carbon, and modifying a work electrode of the electrochemical sensor. The electrochemical sensor can detect a standard solution of nitrite, determine the linear relationship between the nitrite concentration and current, determine nitrite in the food and compare the nitrite content in the food and the linear relationship to obtain nitrite content of the food to be detected. The electrochemical sensor can determine nitrite content of a food, is easy to operate, has a fast detection rate and high detection sensitivity and provides a novel detection method for efficient and rapid detection of nitrite content in a food.
Owner:SHANGHAI OCEAN UNIV
Computer network loop detection method
The invention discloses a computer network loop detection method which comprises the steps of (A) detecting CPU resources of a core switch and monitoring a broadcast data flow, (B) allowing a CPU to read the message of a core switch user port and judging core switch user port forms a loop, (C) allowing the CPU to judge network loop information according to the read message and loop information, (D) controlling the core switch to disconnect a network when an abnormal broadcast data flow is monitored, (E) judging whether to adopt controlled measures if the loop exists, (F) adopting the measures to stop data flow forwarding, and (G) automatically entering into a controlled state if the loop does not exist. The detection method is novel, a port with a network loop fault can be rapidly determined, thus the fault is rapidly eliminated, and the detection efficiency is high.
Owner:SHANGLUO UNIV
Vertical shaft steel wire rope guide sliding sleeve wear amount detecting device and detecting method thereof
ActiveCN108168417ACompact structureEasy to operateUsing electrical meansElectrical/magnetic solid deformation measurementData displayWireless transmission
The invention discloses a vertical shaft steel wire rope guide sliding sleeve wear amount detecting device and a detecting method thereof. The device comprises a plurality of FPC flat cable units, a plurality of voltage detecting circuit units, a control system and a data display device, wherein end faces of two ends of the vertical shaft steel wire rope guide sliding sleeve are respectively provided with the plurality of FPC flat cable units, the plurality of FPC flat cable units are sequentially attached to end part surfaces of the vertical shaft steel wire rope guide sliding sleeve along anouter periphery of a rope hole of a steel wire rope so as to form an enclosure; each FPC flat cable arranging unit is connected to a voltage detecting circuit unit; a signal input end of the controlsystem is in signal connection with a plurality of voltage detecting circuit units, a signal output end of the control module is connected to a wireless transmission module through an output circuit,and the data display device receives data transmitted via the wireless transmission module through the data receiving module. According to the vertical shaft steel wire rope guide sliding sleeve wearamount detecting device and the detecting method thereof, a conventional sensor is replaced with an FPC flat cable to detect a wear amount; the device and the method disclosed in the invention are advantaged by reliable work, high efficiency and the like.
Owner:CHINA UNIV OF MINING & TECH
Book defect automatic detection method and detection device
InactiveCN101929936ANovel detection methodQuick checkMaterial weighingComputerized systemUltimate tensile strength
The invention relates to a book defect automatic detection method and a detection device, which can fundamentally solve the problems of slow check speed, long time consumption, great labor intensity of labors, inaccuracy of the detection, high omission ratio and high fall-out ratio in manual check. The key points of the technical are as follows: firstly establishing an original database in a computer system for storing original weight value of a book; placing the book on a weighing part of the book defect automatic detection device when the book is returned after being borrowed, leading a sensor part connected with the weighing part to produce an electrical signal, changing the electrical signal to a digital signal via an A / D converter, and finally storing the digital signal into the database through an I / O interface of the computer system; and using the computer system to compare detected weight data before and after borrowing the book and further displaying the defect result of the book. The method and the device have the advantages of novel detection principle, fast detection speed and high precision. The method and the device are applicable to libraries and the like.
Owner:尚超
Method for detecting bottle cap surface production date based on machine vision
InactiveCN105301003AQuick checkReduce the impactOptically investigating flaws/contaminationLower limitEnvironment effect
The invention relates to a method for detecting a bottle cap surface production date based on machine vision. According to the method, an LED white ring light source illuminates the surface of a to-be-measured bottle cap. The method comprises the steps of collecting image information of a qualified bottle cap; collecting an image of a to-be-measured bottle cap; performing binarization processing on an image having undergone median filtering pre-processing; performing circle location, finding a bottle cap edge to serve as a round edge, and taking the circle center as an original point to establish a coordinate system; presetting the upper limit and the lower limit of the pixel point number of detection targets according to the pixel point number of sprayed production date codes on the qualified bottle cap, utilizing the round edge obtained in the step 4) and the coordinate system which has been established to set the inside of the circle as an region of interest (ROI), taking the sprayed production date codes as the detection targets, and performing bottle cap detection. A algorithm in use is simple, the steps are fewer, quick detection of the image is achieved, the detection efficiency is high, and the method is subjected to a small environmental influence and is high in accuracy.
Owner:TIANJIN UNIV
Aging evaluation method for liquid silicon rubber for power station equipment
InactiveCN106248917ANovel detection methodIntuitive test resultsMaterial testing goodsAssessment methodsElectricity
The invention discloses a liquid silicone rubber aging evaluation method for power station equipment, which is used for judging the aging performance of the liquid silicone rubber outer insulating sheath of the power station equipment, including measuring the hydrophobicity of the liquid silicone rubber and measuring the thickness of the pulverized layer , Specular gloss measurement, tracking and electrical erosion performance test, X-ray photoelectron spectroscopy analysis and X-ray diffraction analysis, and the above measurement results are combined to judge the aging state of liquid silicone rubber. The evaluation method of the present invention has a novel detection method, intuitive detection results, and is easy to be grasped by power station maintenance personnel. It can accurately judge the aging state of liquid silicone rubber used in power station equipment that has been in operation for many years, and evaluate the outer insulating sheath of power station equipment. Whether it can persist in operation, repair or replacement effectively promotes the safe and stable operation of the power system.
Owner:EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID +1
Direct current small-current transformer and method for measuring current of direct current small-current transformer
InactiveCN103983835AReduce power consumptionReduce volumeIndicating presence of current/voltageEngineeringConductor Coil
The invention discloses a direct current small-current transformer which comprises an annular magnetic iron core allowing a direct current small-current wire to penetrate and surrounded by a winding. The winding is connected with a waveform generator. The waveform generator is connected with a single-chip microcomputer and comprises a first circuit, a second circuit and a comparer, wherein the first circuit and the second circuit are connected in parallel and connected with a power source. The two ends of the winding are connected to the first circuit. The first measurement end of the comparer is connected to the first circuit and the second measurement end of the comparer is connected to the second circuit. The comparer can measure the specific value of data through the first measurement end and the second measurement end, so that the current direction of the power source is changed, the waveform generator generates waves with a certain duty ratio, the waves generated by the waveform generator are received by the single-chip microcomputer, and the volume of the current inside the direct current small-current wire is obtained through change of the duty ratio of the waves. The direct current small-current transformer has the advantages of being small in size, high in accuracy, simple in interface, convenient to install and novel in detection method.
Owner:南京深科博业电气股份有限公司
Detection method of rear casing of mobile terminal and display method of user interface
InactiveCN104655936AImprove experienceNovel detection methodResistance/reactance/impedenceZoomComputer terminal
The invention discloses a detection method of a rear casing of a mobile terminal. A metal contact is arranged on an inner cover of the mobile terminal, a metal piece is arranged in the corresponding position on the rear casing as required, a capacitance value between the metal contact and the metal piece is detected by a capacitance sensor, and finally, the type of the rear casing is recognized according to a code of the detected capacitance value. The detection method is novel and unique and has certain concealment; whether the rear casing of the mobile terminal is manufactured by an original manufacturer can be identified with the detection method, accordingly, a part of functions of a mobile terminal provided with a rear casing which is not produced by the original manufacturer can be shielded, and the function of clamping down on copycatting manufacturers is realized; the detection method can be also used for identifying different types of rear casings, so that the mobile terminal can change a corresponding user interface according to different types of rear casings, and the user experience of the mobile terminal is improved.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Nuclear leak detector and method thereof for detecting pollution sources
PendingCN107765287AMeet the needs of detectionRealize acquisitionRadiation intensity measurementPhotocathodeLight reflection
The invention discloses a nuclear leak detector comprising a lens and a body. A light reflector, an encoding template, a vacuum chamber, an optical fiber cone, a second image sensor, a lens group, a first image sensor, a power supply module, an industrial control module, a data acquisition module and a display screen are arranged in the body successively. The lens group is located above the lightreflector. The first image sensor is located above the lens group. The vacuum chamber includes a metal housing disposed between the encoding template and the optical fiber cone, a titanium window disposed on a side of the metal housing and close to the encoding template, a fluorescent screen disposed on the other side of the metal housing and close to the optical fiber cone, and a photocathode anda micro-channel plate that are both disposed in the metal housing and distributed in the direction from the titanium window toward the fluorescent screen. The nuclear leak detector detects nuclear pollution sources efficiently by a new detection method and improves the accuracy of the location display of radioactive sources so as to meet actual nuclear pollution treatment requirements.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
Construction method of mechanical hole filling pile
InactiveCN110374094AEnsure stabilityAchieve initial positioningFoundation testingBulkheads/pilesTerrainWater flow
The invention discloses a construction method of a mechanical hole filling pile. The construction method particularly comprises the steps of leveling the ground, removing sundries, lofting a pile, embedding a steel pile casing, carrying out drilling construction, cleaning a hole, lifting a reinforcing cage, and pouring concrete, obtaining a filling pile foundation, and detecting the pile foundation. The pile foundation is detected by adopting a method of combing a single pile vertical compression resistance static test with low strain method integrity detection, so that the detection is more complete, and detection data is more complete; the construction method can adapt special terrains such as a mountainous area and an underground flow very well, has the very high adaptability, and is high in construction efficiency; the automation degree is high, and the displacement is flexible and convenient; the construction method is low in noise, low in vibration, large in torque, high in holeforming speed and high in efficiency; the safety performance is high; the construction method is free of mud circulation and is small in environmental pollution; and the construction method is a greenconstruction technology.
Owner:CHINA CONSTR SECOND ENG BUREAU LTD
Method for detecting shortage of products packaged by aluminum foil by microwave and detector thereof
InactiveCN101363805AThe detection method is simpleWide range of applicationsFlaw detection using microwavesPhase shiftedReflected waves
The invention discloses a microwave detection method for missed aluminum foil packages and a detector thereof. Missing of objects in an entire box or bag is judged, and whether the aluminum foil package is missed or not is judged through appropriate electrical signal output by utilizing the reflection and transmission characteristics of microwave signals in specific frequency to different objects, and by detecting the amplitude phase characteristic of echo signals. The signal of the oscillator of the detector enters the arm E of a magic T via an isolator, divided into two equiamplitude inversion signals, and respectively transmitted to two antennas through the two main arms of the magic T, two narrow beams are formed and respectively transmitted into two detected pieces in a detected box, and the reflected wave generated by the two detected pieces enters the two antennas. Because a phase shifter is arranged between one of the main arm of the magic T and the antennas, and hollow wave guide is arranged between the other main arm and the antennas, the two echo signals can return to the two main arms of the magic T in phase by adjusting the phase shift amount of the phase shifter, and can be combined into one signal which is then output by the arm H of the magic T and enters a wave detector. The invention has the advantages of precise detection, convenient carrying, no radiation and no hazard of noise.
Owner:NANJING UNIV OF SCI & TECH
Magnetic microsphere and preparation method thereof, and microorganism detection method
PendingCN109781702AEasy to assembleEasy to achieve uniform distributionRaman scatteringMicrosphereMicrobiology
The invention relates to the field of microorganism detection, in particular to a magnetic microsphere and a preparation method thereof, and a microorganism detection method. The magnetic microspherecomprises a microsphere body which carries negative charges, and a PEI adsorbed on the outer surface of the microsphere body and carrying positive charges. The magnetic microsphere provided by the invention can effectively adsorb microorganisms in a sample; the method has the advantages that the specificity is strong, the adsorption is tight, the interference of other impurities is reduced, different microorganisms are distinguished by detecting Raman signals, the detection time is greatly shortened, the method is convenient and reliable, the accuracy rate is 96% or above, and a novel and rapid detection mode is provided for the diagnosis and treatment of clinical blood infection.
Owner:ACADEMY OF MILITARY MEDICAL SCI
Hardware fitting machining, punching, inspecting and screening method
PendingCN113290265AEasy detection and screeningThe detection method is novel and simpleUsing optical meansConduits/junctionsPush outEngineering
The invention discloses a hardware fitting machining, punching, inspecting and screening method. The method comprises the steps that conveying is conducted, specifically, accessories needing to be machined are placed on a conveying platform at the top of a machining platform, and conveying rollers rotate to convey the accessories into a limiting machining table; and a hole forming is conducted, specifically, a driving mechanism drives a drill bit to descend and rotate, a hole is formed in the middle of each accessory, and after hole forming is finished, the conveying rollers continue to rotate to convey the accessories to an inclined conveying plate. According to the method, a detecting and screening mechanism is arranged, holes generated after accessory machining are conveniently detected, light rays emitted by downward irradiation of a detecting lamp penetrate through the holes formed in the accessories, a generated aperture and the holes are in a certain proportion, a light ray baffle can shield the generated aperture, the aperture is too large due to the fact that the holes are too large, a light source detection plate is irradiated by the aperture, so that the accessories with overlarge holes are detected and screened more simply and conveniently, a left movable frame and the accessories are driven to move by utilizing a pushing telescopic rod, and the accessories with overlarge holes are pushed out of a discharging opening.
Owner:段亚飞
Device and method for detecting quality of slurry in post-tensioned prestressed duct
PendingCN111665280AFirmly connectedAvoid tipping damageMaterial resistanceElectrical resistance and conductancePre stress
The invention discloses a device and a method for detecting the quality of slurry in a post-tensioned prestressed duct. The slurry quality detection device comprises a corrugated pipe and a resistancedetector; two first connecting holes are formed in the end part of the corrugated pipe, the corrugated pipe at the upper end of each first connecting hole is sleeved with a first metal ribbon, the first metal ribbon is connected with a first conductive assembly, and the end part of the first conductive assembly penetrates through the first metal ribbon and then is connected into the first connecting hole; the first conductive assembly comprises a first outer insulating sleeve and a first conductive copper pipe, the first conductive copper pipe is connected with a first conductive wire, and the first conductive wire is connected with the resistance detector through a resistance instrument connecting wire; the first outer insulating sleeve is filled with insulating glue, and the first conductive copper pipe is arranged in the insulating glue. The detection device can be used for more accurately detecting the concrete filling degree. The slurry quality detection method can be used for more conveniently detecting the compactness of concrete, and is convenient and simple to operate.
Owner:SHANDONG TRANSPORTATION INST +2
A liquid level detection method for medicine bottles based on image processing
ActiveCN104819754BEliminate pixel biasMake up for deficienciesImage analysisMachines/enginesTemplate matchingImaging processing
The invention discloses a method for detecting the liquid level of a medicine bottle based on image processing, which collects a typical medicine bottle image to create a reference template image, establishes a matching template and creates a matching template coordinate system; multiple collected images are detected The image of the medicine bottle is matched with the matching template one by one to obtain the displacement matrix of the image of the detected medicine bottle, and the corrected image of the detected medicine bottle image is obtained by using affine transformation; then the corrected image is segmented to obtain the detection area and extract The shape of the liquid level band; then based on the shape characteristics of the liquid level band, the lowest point of the liquid level is calculated, and the qualification of the medicine bottle is judged according to the relationship between the lowest point of the liquid level and the set threshold value of the lowest point of the liquid level α and the threshold value of the highest point β . The detection speed of the method of the invention is fast, and the total processing time of all images of a single bottle of liquid medicine is within 100ms. Its detection has sub-pixel level accuracy, which eliminates the pixel deviation caused by the vibration of the mechanical platform and greatly improves the detection accuracy.
Owner:SHANDONG UNIV
A multilayer film photodetector based on optical singular point design and its detection method
ActiveCN108917925BNovel detection methodSimple structurePhotometry using electric radiation detectorsSemiconductor materialsPhotodetector
The invention discloses a multilayer film photodetector based on optical singular point design and a detection method thereof. The multilayer film photodetector comprises a substrate and a multilayerfilm arranged on the substrate, wherein the substrate is an optical material with transparent communication wave band; and the multilayer film is provided with the optical singular point, and a one-dimensional periodic array is formed by alternately arranging lossless optical materials and lossy optical semiconductor materials, four layers of films are used as a structural unit. The real refractive index, imaginary refractive index and film thickness of the material are accurately regulated and controlled according to the characteristic matrix of light transmission in the multilayer film, so that a unidirectional non-reflection phenomenon that one side reflectivity is not zero and the other side reflectivity is theoretically zero occurs in the detector structure at a specific wavelength. When an external light source is incident on the detector, the refractive index of the semiconductor material changes due to the photoelectric effect, reflection appears at the non-reflective end, so that the purpose of detecting the external light source is achieved. The multilayer film photodetector based on the optical singular point design has the advantages of novel and intuitive detection technology, high sensitivity, good stability and low cost of required detection equipment.
Owner:NANJING UNIV
A novel sulfhydryl fluorescent probe, its preparation method and its application
InactiveCN103788941BDoes not affect functionThe detection method is simpleThiol preparationBiological testingFluoProbesGlycopeptide
The invention belongs to the technical field of biological measurement and in particular relates to a novel sulfhydryl fluorescent probe as well as a preparation method and an application thereof. The novel sulfhydryl fluorescent probe has a structure shown in a formula 1 shown in the specification, wherein R=NH2 or COOH. The novel sulfhydryl fluorescent probe can be used for quantitative analysis or location tracing on polysaccharide, peptide, proteins and nucleic acid.
Owner:CHINA PHARM UNIV
Device for semi-quantitative detection of chromium content in soil with time as coordinate and preparation method thereof
The present invention uses time as a coordinate to semi-quantitatively detect the chromium content in soil. The device and its preparation method include an immersion area, a climbing area, a color development area and a holding area. The climbing area is located in the immersion area and the color development area. between, the color developing area is located between the climbing area and the holding area, the immersion area, the climbing area, the coloring area and the holding area share a detection substrate, the There are water-absorbent fiber layers on the upper and lower surfaces of the detection substrate in the immersion zone and the climbing zone. The color development time of this device has a responsive relationship with the concentration of chromium ions, and can semi-quantitatively detect the concentration of chromium ions in the soil, providing a novel detection method for the detection of chromium ions.
Owner:河南省林业科学研究院
System and method for coplanarity measurement of ic pins with multi-stage reflection and grating imaging
The invention discloses a system and a method for measuring the coplanarity of integrated circuit (IC) pins through multistage reflection and raster imaging. The system mainly comprises an IC chip dead load slant sliding feed mechanism, an external triggering synchronous control circuit, an IC chip pin imagingoptical path system, an image acquisition card and a personal computer (PC)-based intelligent visual inspection system. The IC chip pin imaging optical path system consists of two groups of mutually independent quasi-parallel blue-light light-emitting diode (LED) light sources, two rasters, and a plurality of reflectors and prisms which areorganically combined. A raster stripe images detected from the IC chip pins can be acquired throughthe imaging optical path system; and an image acquisition and analysis software system analyzes the images of the IC chip pins with raster stripes, evaluates the isometry of the pins in the images and the torsional characteristic of the raster stripes, and calculates a corresponding coplanarity error according to a corresponding f function mapping relation between a coplanarity error and the raster stripe curved degree. By the system and the method, two rows of pins of an IC chip are simultaneously imaged, the IC chip pins can be precisely detected through one-time imaging, the structure is compact, and the cost performance is high.
Owner:SOUTH CHINA UNIV OF TECH +1
A detection device and detection method for the wear amount of the sliding sleeve of the shaft steel wire rope tank
ActiveCN108168417BCompact structureEasy to operateUsing electrical meansElectrical/magnetic solid deformation measurementData displayWireless transmission
A vertical shaft steel wire rope cage guide sliding sleeve wear amount detection device includes flexible printed circuit (FPC) flat cable units, voltage detection circuit units, a control system, and data display equipment. Two end faces of a vertical shaft steel wire rope cage guide sliding sleeve are provided with the FPC flat cable units, the FPC flat cable units being sequentially attached to end portion surfaces of the sliding sleeve along an outer periphery of a rope hole of a steel wire rope to form an enclosure; each FPC flat cable unit is connected to one voltage detection circuit unit; a signal input end of the control system is connected with the voltage detection circuit units, and a signal output end of a control module is connected to a wireless transmission module; and the data display equipment receives data transmitted by the wireless transmission module.
Owner:CHINA UNIV OF MINING & TECH
A Method for Detecting Structural Defects in Composite Materials Using Surface Resonance Visualization Technology
ActiveCN107727736BStructurally intactEasy to operateAnalysing solids using sonic/ultrasonic/infrasonic wavesResonanceMaterials science
Owner:DONGHUA UNIV
Method for detecting shortage of products packaged by aluminum foil by microwave and detector thereof
InactiveCN101363805BLow microwave powerAvoid harmFlaw detection using microwavesPhase shiftedReflected waves
The invention discloses a microwave detection method for missed aluminum foil packages and a detector thereof. Missing of objects in an entire box or bag is judged, and whether the aluminum foil package is missed or not is judged through appropriate electrical signal output by utilizing the reflection and transmission characteristics of microwave signals in specific frequency to different objects, and by detecting the amplitude phase characteristic of echo signals. The signal of the oscillator of the detector enters the arm E of a magic T via an isolator, divided into two equiamplitude inversion signals, and respectively transmitted to two antennas through the two main arms of the magic T, two narrow beams are formed and respectively transmitted into two detected pieces in a detected box,and the reflected wave generated by the two detected pieces enters the two antennas. Because a phase shifter is arranged between one of the main arm of the magic T and the antennas, and hollow wave guide is arranged between the other main arm and the antennas, the two echo signals can return to the two main arms of the magic T in phase by adjusting the phase shift amount of the phase shifter, andcan be combined into one signal which is then output by the arm H of the magic T and enters a wave detector. The invention has the advantages of precise detection, convenient carrying, no radiation and no hazard of noise.
Owner:NANJING UNIV OF SCI & TECH
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