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70results about How to "Solving Quantitative Problems" patented technology

Porcelain insulator insulation state evaluation method based on solar-blind ultraviolet imaging image feature

The invention relates to a porcelain insulator insulation state evaluation method based on solar-blind ultraviolet imaging image features. The porcelain insulator insulation state evaluation method comprises the steps of: acquiring a facula area sequence through calculating facula areas of continuous image frames in an UV video; extracting three quantization parameters including a facula area average value, a facula area mean square error and a large facula area frequentness of the facula area sequence by adopting an statistical analysis method; acquiring cluster centers in four insulating states such as good, poor, bad and very bad by adopting a fuzzy clustering algorithm; and then partitioning the insulation state of an insulator to be distinguished based on a minimum-distance criterion. According to the porcelain insulator insulation state evaluation method, the three feature parameters of the facula area sequence are regarded as feature quantities, the cluster centers in four insulating states can be obtained by adopting the FCM algorithm, the insulation state of an unknown sample is judged according to the Euclidean distance from the unknown sample to each cluster center, the quantization problem of ultraviolet imaging detection results is effectively solved, and a reliable basis can be provided for the maintenance or replacement of polluted insulators.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

A retinal blood vessel morphology quantization method based on a connected region

The invention provides a retinal blood vessel morphology quantization method based on a connected region. The method obtains a retinal blood vessel segmentation image after the fundus image is preprocessed, and then performs post-processing on the blood vessel segmentation image. On this basis, the vascular network is thinned and boundary treated, and the vascular centerline network and vascular boundary map are obtained. Corner detection is then performed and removed from the vascular centerline network so that the vascular segments of the vascular network form separate communication areas. Traversing is performed on the blood vessel segment, approximate the centerline of the blood vessel segments, and the blood vessel segment is changed into a broken line to calculate the direction of the blood vessel. At last, that initial diameter value is calculated, the center of the circle is selected by sliding on the centerline of the blood vessel segment, a semicircle window is created according to the direction of the circle cardiovascular and the diameter value measured in the early stage, and the distance between the window and the two intersection points of the blood vessel boundary is taken as a new diameter value. From this iteration, a set of vessel diameter values are measured, and the median value is the vessel diameter of the vessel segment. The invention is applicable to the quantification of large-scale retinal blood vessel morphology, and has high reliability.
Owner:CENT SOUTH UNIV

Ultrasonic time-of-flight diffraction detection method based on synthetic aperture focusing technique

The invention relates to an ultrasonic transit time test method based on synthesis aperture focus in the field of the ultrasonic wave nondestructive inspection of the panel and brazing seam fault. It uses the ultrasonic transit time to obtain the initial B scan image, dose linear process to B scan image and establishes the ultrasonic transit time method B scan image reconstruction math model based on synthesis aperture focus according to the forming course of the B scan image and the geometry relation of the probe and the fault location, at last it achieves the linear-synthesis aperture focus (L-SAFT) reconstruction of the image.
Owner:HARBIN INST OF TECH

AHP (Analytic Hierarchy Process) based assessment method of teaching quality of fuzzy comprehensive remote education

The invention discloses an AHP (Analytic Hierarchy Process) based assessment method of the teaching quality of fuzzy comprehensive remote education, comprising the following steps of: determining index weight by applying AHP; and determining a total assessment result by applying a fuzzy comprehensive assessment method. A method for determining the index weight by applying the AHP comprises the following steps of: establishing a hierarchical structure of a researched problem; judging a matrix by determining paired comparison; carrying out hierarchical single sequencing; carrying out hierarchical total sequencing, and calculating the combinational weight of all elements of a same hierarchy; and carrying out consistency check. The assessment method of the teaching quality of quantitative remote education carries out the data processing by establishing a fuzzy comprehensive assessment model based on the AHP, introducing a theory into the assessment of the teaching quality of the remote education, determining the weight of assessment factors by using the AHP and then establishing a mathematical model by using a fuzzy comprehensive assessment method, thereby transforming the assessment problem into the multiplication problem of the fuzzy matrix for processing.
Owner:XIDIAN UNIV

Part remanufacturing method based on reverse engineering

The invention discloses a part remanufacturing method based on reverse engineering. The part remanufacturing method based on the reverse engineering comprises the following steps: 1) obtaining a surface point cloud data model of a waste part; 2) obtaining the original computer aided design (CAD) model of the waste part; 3) matching the surface point cloud data model of the step 1) with the original CAD model of the step 2); 4) according to the matching result of the step 3), obtaining the maximum damage depth of the waste part; and 5) if the maximum damage depth obtained in the step 4) is lower than the threshold, using the maximum damage depth as the feed rate, and performing the reducing-type repair to the waste part, if the maximum damage depth obtained in the step 4) is higher than the threshold, performing the adding-type repair to the waste part.
Owner:CHONGQING UNIV

Quantitative ELISA (Enzyme Linked Immunosorbent Assay) detection method for antigen 146S of foot and mouth disease A as well as kit and application thereof

The invention discloses a quantitative ELISA (Enzyme Linked Immunosorbent Assay) detection method for an antigen 146S of foot and mouth disease A. The method comprises the steps of (1) storing a standard control antigen of the foot and mouth disease A; (2) purifying and quantifying a standard control antigen 146S of the foot and mouth disease A; (3) establishing an indirect sandwiched ELISA method for the foot and mouth disease A; (4) drawing a standard curve of the standard control antigen; (5) counting the content of the antigen 146S of a tested sample; and (6) detecting sensitivity and specificity. The invention further provides a kit utilizing the detection method. The detection method and the kit have the advantages that when the quantitative ELISA detection method for the antigen 146S of the foot and mouth disease A is used for detecting the content of the foot and mouth disease antigen, not only can the content of the antigens be calculated, but also the antigens can be classified; and the kit prepared by utilizing a principle of the detection method has the advantages of sensitivity, specificity, simplicity in operation, time and labor conservation and good stability and is suitable for batch detection, and serotypes can be distinguished.
Owner:LANZHOU INST OF VETERINARY SCI CHINESE ACAD OF AGRI SCI

Single-joint fault space manipulator pose reaching space solving method

ActiveCN107598929AImplement degenerate workspace establishmentSolve the problem of severe workspace degradationProgramme-controlled manipulatorEngineeringManipulator
The invention provides a single-joint fault space manipulator pose reaching space solving method for realizing quantitative analysis of space manipulator reaching pose degradation conditions after locking of any joint faults. The method comprises the following steps: the manual limiting solution is performed on space manipulator degradation working space locked by single-joint faults based on joints; gesture reaching degree indexes are built to solve space manipulator anticipant gestures facing tasks; the anticipant gestures and all scattering coordinates in the degradation working space are synthesized to build manipulator terminal pose sets; and poses with inverse solutions are screened to obtain the space manipulator pose reaching space with single joint faults. The method can realize solution of the space manipulator pose reaching space locked by any joint faults.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Main and collateral channel detector and detection method thereof

The invention relates to a main and collateral channel detector and a detection method thereof. The main and collateral channel detector comprises a power supply, a controller, a main and collateral channel signal sensor used for measuring main and collateral channel values and a main and collateral channel signal collector used for collecting main and collateral channel value signals, wherein the power supply and the controller are connected. The signal output end of the main and collateral channel signal sensor is connected with the signal input end of the main and collateral channel signal collector. The signal output end of the main and collateral channel signal collector is connected with the controller. The received main and collateral channel value signals are subjected to data processing and output through the controller. A qualitative and positioning quantitative diagnosis instrument and method are provided for traditional Chinese medicine doctors, the quantitative problem about diagnosis of the traditional Chinese medicine doctors is effectively solved, numerical value quantization is visually and accurately performed on a pulse-feeling hand feeling diagnosis method of the traditional Chinese medicine doctors, the result is visually represented through images, a stable and reliable basis is provided for the traditional Chinese medicine doctors to perform combinatory analysis and computation on the basis of the traditional Chinese medicine theory, the scientific and technological level of diagnosis of the traditional Chinese medicine doctors is substantially improved, the doctors are helped to achieve the purpose of performing superior treatment before sickness, and the detector and detection method are suitable for being widely applied.
Owner:文小凡

High and cold sand land vegetation recovery potential estimation method

The invention discloses a high and cold sand land vegetation recovery potential estimation method. The method comprises the following steps that according to growth conditions of different types of sand land in high and cold areas, a vegetation recovery target of the high and cold areas is determined; a hierarchical structure model of vegetation recovery potential estimation of the different types of sand land is built by using an analytic hierarchy process; a judgment matrix, a hierarchical single-row sequence table and a hierarchical total-row sequence table are built by means of the hierarchical structure model of vegetation recovery potential estimation of the sand land; comprehensive evaluation calculation is conducted on the vegetation recovery potential of the different types of sand land by means of a fuzzy comprehensive evaluation method. According to the high and cold sand land vegetation recovery potential estimation method, the good and bad degree comprising 15 evaluation factors and total evaluation of the vegetation recovery potential can be respectively output, and a scientific decision support method can be provided for making of a vegetation recovery policy of the different types of high and cold sand land in different areas of the Qinghai-Tibet Plateau.
Owner:NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA

Equipment and method for coating sensitive material on micro-heater

ActiveCN102755942AControl coating amountReal-time adjustment of coating positionLiquid surface applicatorsCoatingsElectricitySpray nozzle
The invention provides equipment and a method for coating a sensitive material on a micro-heater. The equipment comprises a loading device and a coating device; the loading device comprises a micro-nozzle for loading the sensitive material, a sleeve sleeved at a loading end of the micro-nozzle, and a pressure adjuster for generating a negative pressure in the micro-nozzle; the coating device comprises the micro-nozzle loaded with the sensitive material, a piezoelectric driver for driving the micro-nozzle, a connecting piece for clamping and fixing the micro-nozzle so that a feeding end and a discharge end of the micro-nozzle vertically aligns to the surface of the micro-heater, and a rack connected with the piezoelectric driver; and the rack is provided with a sliding groove where the piezoelectric driver and the micro-nozzle move along the vertical direction. The invention further provides the method for coating the sensitive material on the micro-heater. With the adoption of the equipment and the method for coating the sensitive material on the micro-heater provided by the invention, a coating amount of the sensitive material can be controlled, and a coating position of the sensitive material is adjusted in real time, so that the problem that the sensitive material cannot be quantitatively and uniformly coated on the surface of the micro-heater in prior art can be solved.
Owner:RAE SYST SHANGHAI +1

Method for detecting content of carbon and sulfur in graphene based on high temperature combustion infrared absorption process

The invention belongs to the technical field of analysis detection of the content of important elements carbon and sulfur in graphene, and especially relates to a method for detecting the content of carbon and sulfur in graphene based on a high temperature combustion infrared absorption process. The method comprises the following steps: 1, preparing a high temperature combustion infrared carbon and sulfur analyzer; 2, preparing and weighing a sample; 3, establishing a working curve by using a coal reference substance; and 4, analyzing a compacted graphene sample. The carbon analysis precision reaches 1%, the sulfur analysis precision reaches 2%, obtained results accord with production technology expectation, the precisions meet analysis requirements, the demand of graphene manufacturers for the control and the improvement of the product quality is met, and the gap in the graphene test field is filled.
Owner:NCS TESTING TECH

Quantitative evaluation method for beer packaging production line operation efficiency based on information entropy

The invention discloses a quantitative evaluation method for beer packaging production line operation efficiency based on information entropy, and belongs to an intelligent information processing technology assisting enterprise production management decision technology. The method mainly comprises five steps: step 1, determining a reference variable of efficiency evaluation; step 2, establishing amatter element evaluation model of a beer packaging production line; step 3, using an AHP and an entropy evaluation method to calculate composite weight of the evaluation model; step 4, quantitatively calculating health degree of the beer packaging production line; step 5, establishing a health degree prediction model of the beer packaging production line.
Owner:BEIHUA UNIV

State evaluation method for urban underground comprehensive pipe gallery

ActiveCN110197329AImprove engineering practicabilityAchieving Systematic EvaluationResourcesAssessment methodsEngineering
The invention discloses a state evaluation method for an urban underground comprehensive pipe gallery. The state evaluation method comprises the following steps of analyzing a possibility factor of danger occurrence of the comprehensive pipe gallery, and analyzing an influence degree factor after the danger occurrence of the comprehensive pipe gallery; according to the possibility factor of dangeroccurrence of the utility tunnel and the influence degree factor after danger occurrence, carrying out hierarchical division on the possibility of danger occurrence and the influence degree after danger occurrence respectively; respectively calculating the comprehensive weight of the possibility factor to the danger possibility P1 and the comprehensive weight of the influence degree factor to thedanger influence degree P2 by adopting an analytic hierarchy process; carrying out expert scoring on each possibility factor and each influence degree factor, and respectively calculating a danger possibility P1 and a danger influence degree P2; and calculating a state comprehensive score R of the comprehensive pipe gallery by using the danger possibility P1 and the danger influence degree P2. The state evaluation method can perform comprehensive and systematic state evaluation on the comprehensive pipe gallery and is suitable for the practical engineering application.
Owner:ANHUI ZEZHONG SAFETY TECH +2

Array-type lateral well logger with different layering powers

The ivnention relates to an array logging tool in the side direction with various layering capabilities. It includes a multi-signal source, multiple groups of shielded electrodes, a monitoring device, a main electrode group, voltage measuring and processing set, and main electrode current detecting and processing set. The multi-signal source produces multiple working signals with different frequencies. Each group of shielded electrodes sends working signal to different layer of earth, meanwhile forms focusing electric field. The monitoring device receives and magnifies first working signal transmitted by multiple groups of shielded electrodes. The main electrode group includes a central electrode and multiple pairs of electrodes arranged outwards for signal refocusing. One measurement in the invention can obtain 12 apparent resistivity curves that describes the geology in detail, explains layers of earth in the orientation analysis, gives quantitative explanations to the problems of layers and alternate laminar layers.
Owner:中国石油集团长城钻探工程有限公司测井公司

Quantitative enzyme-linked immuno-sorbent assay (ELISA) detection method for Asia I-type foot-and-mouth disease antigens 146S as well as kit and application of quantitative ELISA detection method

The invention discloses a quantitative enzyme-linked immuno-sorbent assay (ELISA) detection method for Asia I-type foot-and-mouth disease antigens 146S. The method comprises the following steps of: (1) storing Asia I-type foot-and-mouth disease standard reference antigens; (2) purifying and quantifying the Asia I-type foot-and-mouth disease standard reference antigens 146S; (3) establishing an Asia I-type foot-and-mouth disease indirect sandwich ELISA method; (4) drawing a standard curve of the standard reference antigens; (5) calculating the content of the antigens 146S in a detected sample; and (6) detecting the sensitivity and specificity. The invention also provides a kit which adopts the detection method. The quantitative ELISA detection method for the Asia I-type foot-and-mouth disease antigens 146S and the kit have the beneficial effects that when the content of the foot-and-mouth disease antigens is measured by using the quantitative ELISA detection method, the content of the antigens can be calculated, and the antigens can be parted; and the kit prepared by using the principle of the quantitative ELISA detection method is sensitive, specific, simple to operate, good in stability and suitable for batch detection, saves time and labor, and can distinguish serotypes.
Owner:LANZHOU INST OF VETERINARY SCI CHINESE ACAD OF AGRI SCI

Mechanical automatic feeding mechanism

The invention belongs to the technical field of feeding equipment and especially relates to a mechanical automatic feeding mechanism which comprises an outer shell, a feeding hole shell above the outer shell and a conveying belt assembly under the outer shell, wherein a material collection box is clamped above the conveying belt assembly; a fixation base is disposed on one side of the outer shell;and the fixation base and the outer shell are fixedly connected by a fastening screw. According to different positions of a bearing plate which is moved according to marks inside a linkage box, a quantity of materials which can be stored in the linkage box is controlled and thus the materials in the linkage box of the fixed quantity can be smoothly conveyed into the corresponding material connection box after subsequent periodic rotation of a wheel disk body together with the linkage box; in this way, the problem that quantification and transportation of the materials are not effective enoughduring use of an original mechanical automatic feeding mechanism can be solved; and through mechanical use, manpower waste and workers' labor strength are reduced, safety is enhanced and production efficiency is also increased.
Owner:LANZHOU INST OF TECH

Dynamic feedback adjustment method for integrated evaluation and guidance of artificial regulation of slope ecological restoration by using slope ecological restoration project

InactiveCN106651138ASolving Quantitative ProblemsSolve qualitative problemsResourcesEngineeringEvaluation result
The invention provides a dynamic feedback adjustment method for integrated evaluation and guidance of artificial regulation of slope ecological restoration by using a slope ecological restoration project. The method comprises: step one, constructing an integrated quality evaluation system of a slope ecological restoration project; step two, recording a final evaluation result as Ax; step three, analyzing a real-time existence problem of a target slope ecological restoration project; step four, studying and determining a problem found out at the step three and selecting a regulation method; step five, formulating a regulation plan; step six, implementing a regulation plane; step seven, recording a final evaluation result as an A x+1; and step eight, comparing the A x+1 with an expected target and implementing the optimized regulation plan step at least once until the final evaluation result reaches the expected target. According to the method provided by the invention, problems of difficult quantitative and qualitative evaluation of the slope ecological restoration project can be solved.
Owner:CHINA THREE GORGES UNIV

Rolling method tobacco sheet production process

A rolling method tobacco sheet production process comprises the following steps that 1, in the raw material pretreatment stage, coarse smashing and drying treatment is conducted on large tobacco leaves and tobacco stems, and preparation is made for later-period fine smashing; 2, a raw material crushing stage; 3, proportioning, homogenizing and mixing; 4, a multi-stage rolling section: the sheets are thinned step by step through multi-stage rolling, so that the quantification and the tensile strength of the sheets meet the index requirements; 5, a slice low-temperature drying section, wherein the slices are heated through steam and dried at a low temperature; and 6, molding treatment: rolling or slicing and shredding treatment is performed on the molded sheet. The rolling method tobacco sheet production process aims to solve the technical problems that in the traditional rolling process, the sheet quantification cannot reach the index, and the tensile strength is low, and the sheet is easy to volatilize when not combusted at low temperature.
Owner:中国船舶工业总公司七一五研究所宜昌分部

Upper-water-permeable lower-water-resistible type cap rock collapse cause experimental device

InactiveCN108877451ADynamic changes are clearly visibleSolving Quantitative ProblemsEducational modelsEarly warning systemKarst
The invention relates to an upper-water-permeable lower-water-resistible type cap rock collapse cause experimental device and belongs to the karst collapse research technical field. With the upper-water-permeable lower-water-resistible type cap rock collapse cause experimental device of the invention adopted, the whole process of the cause of the collapse of upper-water-permeable lower-water-resistible karst triggered by the rise and fall of groundwater level can be directly expressed, and the variation law of the intensity of pressure in a karst cave and the formation and expansion of a soilcave which are caused by the erosion of lower layer soil by groundwater can be visually showed, and related testing and parameter determination can be performed. Experimental data and experimental rules obtained by the device of the invention are very useful for analyzing and studying essential relationships between the groundwater level and karst collapse geological disasters, especially, a new technical means is provided for studying seepage deformation generated in the variation process of the groundwater level of the karst cave and karst collapse caused by the formation and expansion of the soil cave which are caused by the erosion of the lower layer soil; the development process of such karst collapse is reproduced; the formation mechanism of the karst collapse is revealed; and a certain reference value is provided for work such as the establishment of a karst collapse prevention, disaster reduction and early warning system.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY

Ultrasonic detection block device for steel rail welded with cable on rail waist and detection method

The invention discloses an ultrasonic detection block device for a steel rail welded with a cable on the rail waist and a detection method. The cable is welded to one end of the rail waist of the steel rail of a first block of the block device through a copper welding point, and a first flat-bottomed hole, a second flat-bottomed hole and a third flat-bottomed hole are formed in the cross section of the other end of the rail waist of the steel rail; and a first transverse through hole, a second transverse through hole and a third transverse through hole are formed in one end of the rail waist of the steel rail of a second block, and a fourth flat-bottomed hole, a fifth flat-bottomed hole and a sixth flat-bottomed hole are formed in the other end of the rail waist of the steel rail. By comparing with the defect-free first block welded with the cable, the condition that contourlets of the welding point are falsely judged as defect waves in detection can be avoided; by manufacturing a limited number of standard defects at specific positions of the block and comparing standard defect echo heights with actual defect echo heights, the defect equivalent sizes are determined; the defect positions are determined according to the defect echo positions, and cracks and spot defects in different directions are detected by means of different scanning modes; and operation is easy, and detection results are accurate.
Owner:中铁检验认证中心有限公司

Method and kit for analyzing ploidy of unicellular sex chromosomes quickly

The invention relates to a method and kit for analyzing the ploidy of unicellular sex chromosomes quickly. According to the method, primers, as shown in SEQ ID NO.1-6, for X chromosome, Y chromosome and chromosome 21 respectively are adopted for preamplification of trace DNA from a single cell firstly, then nested primers as shown in SEQ ID NO.7-12 are adopted for real-time fluorescent quantitative PCR to obtain the DNA content values K and L of X chromosome and Y chromosome relative to the internal reference, a male standard substance, a female standard substance and a negative control group are arranged at the same time, and finally the values of K / L, K / K [female standard], L / L[female standard], K / K [male standard] and / or L / L[male standard] are calculated and the ploidy of the sex chromosomes of a sample to be tested is obtained. The method has the advantages of being high in accuracy, short in time and low in cost when used for analyzing the ploidy of the unicellular sex chromosomes and is helpful for clinical genetic diagnosis.
Owner:SHANGHAI FIRST MATERNITY & INFANT HOSPITAL

Multi-sleeve static sounding element capable of effectively recognizing contact surface friction resistance of geotechnical material

The invention discloses a multi-sleeve static sounding element capable of effectively recognizing contact surface friction resistance of a geotechnical material. A round hollow shaft rod (1) is arranged at the top of the element, four novel lateral wall friction sleeves (2) (four lateral wall friction sleeves with different surface roughness and including 2.1, 2.2, 2.3 and 2.4) are sequentially arranged under the round hollow shaft rod (1) at intervals, a single load sensor (6) is arranged on the inner wall of each novel friction sleeve (2), diamond protrusions (7) with different numbers and intervals are distributed on the surface of each friction sleeve (2), a common side lateral wall friction sleeve (3), a hole pressure filter ring (4) and a conical probe (5) are sequentially arranged under the novel lateral wall friction sleeves (2). The element has the advantages of being simple, repeatable, easy to operate and the like and provides a powerful detection tool for design of underground structures such as deep foundation, friction piles, soil blocking wall and the like, soil body recognition, soil layer interface judgment and the like.
Owner:SOUTHEAST UNIV

Ship ballast water sampling device for keeping bioactivity

The invention relates to a ship ballast water sampling device for keeping bioactivity. A bypass two ends of which are both communicated with a main pipeline is arranged on a main pipeline between a ballast bin and an exhaust bin; the sampling device is installed on the bypass; flow meters are connected in series on the bypass at two sides of the sampling device; the sampling device comprises a prefilter and a filter which are sequentially connected; water inlets and water outlets of the prefilter and the filter are all provided with valves; the valves and the flow meters are all connected with a control system. A plankton net with a huge volume is not used, and the qualitative and quantitative problems in the ship ballast water biology sampling process are solved; because the ballast water emission standard is for survival organisms, the organism survival is ensured in the filtering and treatment processes, and the influence is minimized.
Owner:SUNRUI MARINE ENVIRONMENT ENG

Quantitative sampling device for soil thermoluminescence measuring sample

The invention discloses a quantitative sampling device for soil thermoluminescence measuring sample. The quantitative sampling device comprises a funnel disc (1), a quantitative disc (2) and a quantitative platform (3), wherein the funnel disc (1) is fixedly connected with the quantitative platform (3) through a connecting shaft (15), and the quantitative disc (2) is arranged between the funnel disc (1) and the quantitative platform (3); the quantitative disc (2) is connected with the connecting shaft (15) through a shaft hole in a swinging manner, the funnel disc (1) is provided with a discharge abdication port (9), the quantitative disc (2) is provided with a revolution abdication port (10), and a limiting bolt (7) is arranged in the revolution abdication port (10) and is connected with the funnel disc (1) or and the quantitative platform (3); one side of the revolution abdication port (10) is connected with the limiting bolt (7) in a limiting manner, the outlet of a funnel (8) is corresponding to the inlet position of the quantitative guide hole (11), and the other side of the revolution abdication port (10) is connected with the limiting bolt (7) in the limiting manner; and the outlet of the quantitative guide hole (11) is corresponding to the inlet position of the discharge guide hole (14), and the inlet position of the quantitative guide hole (11) is arranged in the discharge abdication port (9). The sampling device provided by the invention ensures the sample to be quantitative and the operation to be simple and rapid.
Owner:EAST CHINA UNIV OF TECH

A test method for zero-sequence current transformer

The invention relates to a zero-sequence current transformer test method, which belongs to the technical field of current transformer tests. Connect the rated load to the secondary terminal of the zero-sequence current transformer, pass the current through the primary terminal of the zero-sequence current transformer, measure the voltage (usually mV level) at both ends of the load with an electronic voltmeter, and control the voltage indication to the converted value The specified value depends on whether the primary current is qualified. The invention solves the quantification problem of the test results of the zero-sequence current transformer test, and has the advantages of scientificity, rationality and the like.
Owner:大连互感器有限公司

Mobile intelligent patrol equipment for infrastructure construction and intelligent management method

The invention discloses mobile intelligent patrol equipment for infrastructure construction and an intelligent management method. The equipment comprises an information acquisition system used for acquiring infrastructure under construction, construction auxiliary facilities and surrounding terrains, and a central processing system used for receiving data information data transmitted by an information acquisition unit and comprehensively analyzing and judging construction safety, quality and progress safety states. The advantages that machine vision, machine hearing, machine smell and machine sensation are easy to acquire, quantifiable, storable and analyzable are fully utilized, and a panorama camera, a laser radar, a sound vibration gas sensor, environmental climate acquisition, advancing track navigation and an AI (artificial intelligence) comprehensive analysis and evaluation system are organically integrated into walking equipment, and comprehensive and scientific management of large-area infrastructure construction patrol by owners is realized. The patrol equipment solves the problem that it is difficult for existing owners to comprehensively, quantitatively and truly obtain the site and progress conditions of the construction site through patrol.
Owner:SHENZHEN UNIV

Ultrasonic tandem probe device and method

The invention belongs to the technical field of research on a nondestructive flow detection device and relates to an ultrasonic tandem probe device and an ultrasonic tandem probe method. The crack defects of casting and welding pieces thereof are detected by mainly utilizing ultrasonic wave. Two probes are adopted, one of the probes emits a signal and is an emitting probe, and the other one receives the signal and is a receiving probe; the emitting probe emits ultrasonic wave; when the ultrasonic wave encounters the crack defects, waveform received by an oscilloscope screen is changed; in thedetection process, the ultrasonic wave emitted by the emitting probe forms end-point diffraction wave at the end-point position of the crack, the receiving probe receives the diffraction wave and performs continuous detection in different directions, and the diffraction wave is maximal when the two probes are symmetrical about the plane on which the cracks are; and the maximal amplitude is captured on the oscilloscope screen, sound velocity and sonic path distance are measured, and the position and the depth of the crack are determined.
Owner:KOCEL STEEL

Crack sensing system and method based on distributed short-gauge optical fiber strain sensor

ActiveCN113310423AComprehensive early warningComprehensive and accurate quantitative assessmentUsing optical meansFiber strainEngineering
The invention discloses a crack sensing system and method based on a distributed short-gaugeoptical fiber strain sensor. The system comprises a distributed short-gaugeoptical fiber strain sensor and a standard Brillouin optical fiber demodulation device, wherein the distributed short-gauge optical fiber strain sensor is arranged on the surface or in a monitoring structure, brillouin gain spectrum data of different monitoring sections in different periods are read through the demodulation device, early warning and positioning are performed on a crack according to the crack fingerprint features of the gain spectrum, signal processing is performed on the crack section gain spectrum, the center frequency of each peak is determined through a peak-dividing fitting algorithm, and the crack width is calculated through the center frequency of each peak of the gain spectrum. According to the invention, the inherent performance limit of standard Brillouin demodulation equipment is broken through, comprehensive early warning and accurate quantitative evaluation of various structural cracks are realized, long-term monitoring of ultra-long-distance cracks is conveniently and economically realized, and order-of-magnitude reduction of monitoring cost and order-of-magnitude improvement of monitoring effect are realized.
Owner:SOUTHEAST UNIV

Indoor positioning and navigation method based on grid beacon and building information model

The invention provides an indoor positioning and navigation method based on a grid beacon and a building information model, and the method comprises the steps: deploying a paper grid beacon or an RFIDtag in a building based on a building three-dimensional grid code, and achieving the correlation between building internal information data and unit grids; meanwhile, traffic capacity quantificationis carried out on each unit grid in the building three-dimensional grid model, a gridding path efficient calculation model is constructed, the starting point position of the user is determined throughthe paper grid beacon, and indoor navigation path calculation can be carried out according to the terminal point position received by the terminal.
Owner:北京北斗伏羲科技有限公司

Sensor quantization method for space optics effective loading force disturbance simulation source actuator

ActiveCN104787362AReduce computing performance and control precisionSolving Quantitative ProblemsCosmonautic condition simulationsImage resolutionPayload
The invention provides a sensor quantization method for a space optics effective loading force disturbance simulation source actuator and belongs to the technical field of testing space platform micro-vibration environmental adaptability through space optics effective loads. The sensor quantization method aims to realize the space optics effective loading force disturbance simulation source actuator. The method comprises the step one of determining a control loop type, the step two of determining a sensor type and the sensitivity, the step three of determining the control range and the minimum control step size, the step four of determining the sensor quantization bit width, and the step five of carrying out gain compensation on sensors of a loop. The method achieves the effect of sensor quantization of the space optics effective loading force disturbance simulation source actuator, normalization processing and resolution setting of multi-sensor quantization of the loop are controlled, and the situation that due to the fact that in a digital controller, a large number of division operations are guided into the sensor normalization processing, the operation performance and the control precision of the controller are reduced.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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