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Method for differentiating propolis and poplar gum
InactiveCN106770763AAvoid unstable bugsOvercome the drawback of poor reproducibilityComponent separationPropolisEvaporation
The invention relates to a method for differentiating propolis and poplar gum. The method includes following steps: (1), ultrasonically dissolving propolis and poplar gum respectively, centrifugally filtering, performing rotary evaporation on filtrate to form paste to obtain propolis extract and poplar gum extract; (2), using methanol to respectively dilute the propolis extract and the poplar gum extract to obtain propolis analysis liquid and poplar gum analysis liquid; (3), respectively injecting samples of the propolis analysis liquid and the poplar gum analysis liquid into a high performance liquid chromatography-free radical detection system combined online detection system; (4), comparing chromatogram of propolis with chromatogram of the poplar gum to differentiate propolis and the poplar gum. By the method, an anti-oxidation active ingredient can be used as a comparison product, the defect that fingerprint spectra are low in repeatability is overcome, and the defect that the comparison product is unstable due to degrading and activity loss of the active ingredient can be avoided. The method is efficiency, visual, simple and convenient to operate and high in sensitivity and repeatability.
Owner:ZHEJIANG OCEAN UNIV
Vibration acoustic wave based charged flaw detection device and method for porcelain post insulator
InactiveCN104897776AImprove detection ability and detection efficiencyQuick detection functionAnalysing solids using sonic/ultrasonic/infrasonic wavesCharge detectionManagement system
The invention discloses a vibration acoustic wave based charged flaw detection device and method for a porcelain post insulator. The device comprises a detecting device, an insulating bar and a background data management system, wherein the detecting device comprises a casing, an emitting probe and a receiving probe, wherein the emitting probe and the receiving probe are arranged at the upper end of the casing, a control circuit board is arranged in the casing, and a thread fixing hole is formed in the lower end of the casing; a screw rod is arranged at the upper end of the insulating bar and is spirally connected with the thread fixing hole; the background data management system is connected with the detecting device through the wireless network. A vibration load is applied to the porcelain post insulator, the vibration frequency of the porcelain post insulator is detected, accordingly, the complete detection function of the porcelain post insulator is realized, the problem of failure in charged detection is solved, the detection result is directly and effectively reflected in a vibration spectrogram form, and a large amount of labor and manpower is saved.
Owner:国网山东省电力公司聊城供电公司
Method for determining sodium copper chlorophyllin in olive oil
InactiveCN103969373AThe pre-processing process is simpleStrong specificityComponent separationUltraviolet detectorsFluid phase
The invention discloses a method for determining sodium copper chlorophyllin in olive oil. A sample is extracted through an extracting solution and then is subjected to low-temperature high-speed centrifugation, and supernatant is separated through a liquid chromatography, is detected through a diode array detector, is subjected to nature determination through retention time and is quantified by an external standard method. The method comprises the following steps: step1. preparing a standard working solution, a standard using solution for standard addition and olive oil mixed with sodium copper chlorophyllin in a simulating manner; step 2. respectively carrying out liquid chromatogram determination on the three kinds of solutions of the step 1 by adopting a high performance liquid chromatography; drawing a regression curve of the standard working solution by using the concentration x of sodium copper chlorophyllin in the standard working solution as an x-coordinate and the correspondingly-measured peak area y as a y-coordinate, and calculating a slope factor a and an intercept b of the regression curve according to a linear equation (y=ax+b) obtained based on the curve; step 3. according to the standard curve equation, calculating the concentration of sodium copper chlorophyllin in olive oil. According to the method, a universal liquid chromatographic column and an ultraviolet detector are adopted to carry out high performance liquid chromatogram determination for the sodium copper chlorophyllin, and the interference of determination of other substances is eliminated. According to the method, the content of sodium copper chlorophyllin in olive oil can be accurately measured, the quantifying is accurate and reliable and the reproducibility is good.
Owner:ANIMAL & PLANT & FOOD INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
Serologic detecting kit for potyvirus on sweet potato and detecting method thereof
The invention relates to a serologic detecting kit for potyvirus on a sweet potato and a detecting method thereof. The kit is divided into an upper layer and a lower layer, wherein reagent bottles are arranged on the upper layer; a push-pull drawer is arranged on the lower layer; a nitrocellulose film is placed into the drawer; and a specific antibody for the potyvirus, a mixed antibody for the potyvirus and a goat anti-rabbit IgG, NBT, BCIP and Tris-HCl solution marked with alkaline phospholipase are respectively filled in different reagent bottles. When a sample is detected, the reagent bottle containing the mixed reagent is used for detecting if the sample contains the potyvirus; other specific antibodies are used for detecting when a certain specific virus needs to be confirmed; the detection is convenient; and the cost is saved; and the detecting method is simple, direct, convenient and practical. The serologic detecting kit and the detecting method provided by the invention can be applied to the detection for the detoxified sweet potato stem seedling and all-level potatoes, and the quality and the yield-increasing effect of the detoxified sweet potatoes are ensured by quickly and efficiently detecting the potyviruses.
Owner:HENAN ACAD OF AGRI SCI
Non-constant-temperature type heated electronic smoking set consistency detecting method and system
ActiveCN108241003AIntuitive detection methodEffective detectionMaterial flaws investigationThreshold curveStandard samples
The invention provides non-constant-temperature type heated electronic smoking set consistency detecting method and system. The method comprises the following steps: screening a standard sample from mass-produced electronic smoking sets; acquiring the temperature change curve of the standard sample and the temperature change curve of each electronic smoking set to be detected; determining the upper and lower floating temperature threshold according to the temperature change curve of the standard sample, and acquiring the upper and lower temperature threshold curve of the standard sample; judging whether the temperature value on the temperature change curve of the electronic smoking set to be detected exceeds the temperature range of the upper and lower temperature threshold curves of the standard sample or not; and carrying out sensory evaluation and test on the electronic smoking set to be detected which exceeds the temperature range of the upper and lower temperature threshold curvesof the standard sample. The method and the system are effective for the detection of mass-produced products, are wide in application range, and are not limited by the heating mode and structure; thetemperature detection is sensitive, and the realization device is simple.
Owner:SMISS TECH
One-step droplet digital PCR method for quantitatively detecting GII type norovirus in fruits and vegetables
ActiveCN107338328ASensitive detection methodThe detection method is accurateMicrobiological testing/measurementPcr methodQuarantine
The invention discloses a one-step droplet digital PCR method for quantitatively detecting the GII type norovirus in fruits and vegetables. According to the method, RT-ddPCR is utilized, a primer and a probe for RT-qPCR detection of the GII type norovirus are combined for use, reaction is carried out, and then the high-sensitivity rapid detection for the GII type norovirus is realized. The method is high in sensitivity and can achieve about 2copies / [mu] L, but the sensitivity of the conventional RT-qPCR is usually 10 copies / [mu] L; the amplification efficiency is high, the amplification efficiency is 95.4%, R2 is equal to 0.9973. Under low copy number, compared with RT-qPCR, the method provided by the invention can more effectively avoid the influences of inhibitors in fruits and vegetables, and the false negative generation is reduced. Therefore, the detection method provided by the invention is sensitive, accurate and visual, a novel detection method is provided for the government departments including the agriculture department and the inspection and quarantine bureau, and related detection mechanisms and enterprises, and guiding significance is also achieved.
Owner:JINAN UNIVERSITY
Detection system and detection method of base band digital video frame rate
PendingCN107734329AHigh technical requirementsIntuitive detection methodTelevision systemsDigital videoGray level
The invention relates to a detection system and a detection method of a base band digital video frame rate. The system comprises a video frame rate detection card, a video quality assessment analyzerand a tested video camera, wherein the video frame rate detection card comprises a dial plate, a pointer which is driven by a motor to rotate at a constant seed is arranged on the dial plate, long scale lines are arranged on the dial plate every five degrees, and short scale lines are arranged on the dial plate every one degree; the video frame rate detection card also comprises a detection stripand an image positioning point used for automatically finding dial plate and pointer positions when image recognition is performing, wherein the detection strip is composed of multiple pieces of colors with different gray levels; the video frame rate detection card is a real image card, generates a continuous movement image, provides a continuous video source for the tested video camera, and transmits data to the video quality assessment analyzer through imaging of the video camera, sampling and coding. The detection method provided by the invention adopts the detection system of the base banddigital video frame rate for detecting.
Owner:浙江贝尔技术有限公司
Primer group, kit and method for detecting AML related gene mutation
ActiveCN110982884AHigh sensitivityImprove detection efficiencyMicrobiological testing/measurementDNA/RNA fragmentationGenes mutationMutation frequency
The invention discloses a primer group, a kit and a method for detecting AML related gene mutation, and belongs to the technical field of gene detection. The primer group provided by the invention comprises one or more of an FLT3 gene primer pair, a DNMT3A gene primer pair, an IDH1 gene primer pair, an IDH2 gene first primer pair, an IDH2 gene second primer pair, a KIT gene primer pair and an NPM1gene primer pair; the kit provided by the invention comprises the primer group and one or more of an FLT3 gene probe, a DNMT3A gene probe, an IDH1 gene probe, an IDH2 gene first probe, an IDH2 gene second probe, a KIT gene probe and an NPM1 gene probe. The detection method for detecting AML related gene mutation provided by the embodiment of the invention has the characteristics of high efficiency, simplicity, convenience, intuition and high sensitivity, and can be used for quantitatively analyzing the AML related gene mutation frequency.
Owner:CARRIER GENE TECH SUZHOU CO LTD
Method for detecting grouting fullness of prestressed duct of bridge
InactiveCN108344799AHigh precisionImprove work efficiencyAnalysing fluids using sonic/ultrasonic/infrasonic wavesElasticity measurementPre stressRadar
The invention relates to a method for detecting grouting fullness of a prestressed duct of a bridge, and the method comprises the following steps: S1 adopting a radar data acquisition system to perform positioning detection on a bottom plate longitudinal prestressed duct; S2 based on radar positioning combining a drawing and the position of a remaining in-box grouting hole, preliminarily marking the position of the bottom plate longitudinal prestressed duct; S3 adopting a micro-damage drilling method to drill holes at both ends of the bottom plate longitudinal prestressed duct to verify the position of the bottom plate longitudinal prestressed duct; S4 using an air compressor to blow air to detect the connectivity of the bottom plate longitudinal prestressed duct to judge whether the bottom plate longitudinal prestressed duct is defected; and S5 using a single-point impact echo test system to detect the impact echo reflection time of the bottom plate longitudinal prestressed duct, andcomparing the the impact echo reflection time of the bottom plate longitudinal prestressed duct with a calibration reflection time to judge the internal grouting condition of the prestressed duct. Themethod has the advantages of being simple, intuitive, convenient, accurate and practical, can effectively improve the accuracy and working efficiency of detection work, and can be widely used for detecting the grouting fullness of the prestressed duct of the bridge.
Owner:菏泽城建工程发展集团有限公司
Method for detecting content of manganese in sewage by using fluorescent bacteria
The invention discloses a method for detecting the content of manganese in sewage by using fluorescent bacteria, relating to the field of methods for detecting the content of manganese in the sewage and aiming to solve the problems that the traditional method for detecting the content of manganese in the sewage is expensive in equipment, complex in processing, high in cost, large in workload and high in error. The method for detecting the content of manganese in the sewage by using the fluorescent bacteria comprises the steps of: 1, preparing an LB (Luria-Bertani) liquid culture medium; 2, culturing fluorescent bacteria; 3, diluting a bacterial solution; 4, preparing bacterial solutions with different manganese contents and culturing; 5, carrying out fluorescent detection; 6, establishing a rectangular coordinate system and calculating a regression equation; 7, detecting the fluorescent intensity of the bacteria solution containing the sewage to be detected; and 8, working out the manganese content of the sewage to be detected. The method disclosed by the invention is applied to the field of sewage detection.
Owner:NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
Gauge and part detection method
InactiveCN111197951AImprove detection efficiencyHigh precisionMechanical measuring arrangementsEngineeringScrew thread
Owner:NIO CO LTD
Method for efficiently processing song volume equalization
ActiveCN111986696AThe detection method is simpleIntuitive detection methodElectrophonic musical instrumentsSpeech analysisEngineeringEqualization
Owner:湖南融视文化创意有限公司
Circuit and film for deformation detection
InactiveCN107816937ATimely detectabilityTimely replacementElectrical/magnetic solid deformation measurementUsing optical meansPower flowCircuit under test
The invention discloses a circuit and film for deformation detection, which are arranged on the surface to be tested. The circuit includes a plurality of pixel units, including (n / 2) rows*m columns, and each pixel unit has a first input terminal, The second input terminal and the output terminal, the first input terminal is used to receive the first voltage signal, the second input terminal is used to receive the pulse signal, the output terminal is used to output the current signal, when the current signal changes, then It is determined that the area of the corresponding pixel unit changes, and the surface to be measured is deformed. For the circuit and film of the present invention, when the output current signal changes, it means that the area of the corresponding pixel unit has changed, and since the circuit and the film are attached to the surface to be tested, it means that the surface to be tested has been deformed. Therefore, it is convenient for users to detect and replace abnormal products in time, and accidents are avoided. Moreover, the detection method of the present invention is intuitive and easy to operate.
Owner:AU OPTRONICS CORP
Method for rapidly detecting retrovirus by using cell ultrathin section electron microscope
PendingCN111537531AIntuitive detection methodImage detection methodPreparing sample for investigationMaterial analysis by transmitting radiationStainingElectron microscope
The invention discloses a method for rapidly detecting retrovirus by a cell ultrathin section electron microscope. The method comprises the following steps: 1) collecting and fixing of a sample; 2) uranium acetate block dyeing; 3) dehydrating, permeating and polymerizing; 4) slicing, dyeing and detecting through a transmission electron microscope. Compared with a traditional method, the method hasthe advantages that the sample preparation efficiency is greatly improved, the traditional 5-7-day sample preparation period is shortened to 1 day, and an ultrathin slicing technology for rapidly detecting viruses becomes possible. Compared with a traditional virus detection method, the optimized ultrathin section electron microscope technology for detecting viruses has the advantage that the specificity, accuracy and detection efficiency of virus detection are greatly improved.
Owner:SUZHOU YAOMING KANGDE INSPECTION TESTING
Temperature control device for edible oil and fat detection
InactiveCN104391096AEasy to controlEasy to adjustAuxillary controllers with auxillary heating devicesTesting foodTemperature controlOil and grease
The invention relates to a temperature control device for edible oil and fat detection. The temperature control device is simple in structure, convenient to operate and suitable for popularization and application. The temperature control device comprises a box body, wherein a cavity is formed in the box body and is filled with detection fluid; a detection area and a temperature control area are formed at the left and right sides of the cavity; an axial-flow cylinder is arranged at a position, which is positioned in the temperature control area, on the top of the box body; multiple communicating openings are formed in the peripheral side of the upper part of the axial-flow cylinder in a penetrating mode; a motor is arranged on the box body; a rotating shaft of the motor stretches into the cavity and is positioned in the axial-flow cylinder; stirring blades used for draining the detection fluid downwards are arranged at the free end of the rotating shaft; a heating rod connected with an external heating device is arranged at a position, which is positioned between the rotating shaft and the inner wall of the axial-flow cylinder, on the box body; and a placement opening at which a tester for measuring the edible oil and fat is arranged is formed in a position, which is positioned in the temperature control area, on the box body.
Owner:泉州泽仕通科技有限公司
Harmful gas detection system
InactiveCN107831280AImprove monitoring effectIntuitive detection methodMaterial analysisToxic gasFiltration
The invention provides a harmful gas detection system, which comprises a monitor terminal arranged at a remote monitoring center, a gas detection device arranged at a monitoring station and a filtering and exhaust device. The gas detection device is connected to the monitor terminal through a wireless network. The gas detection device comprises a toxic gas detector. The monitor terminal comprisesa processor, a display and an alarm. The processor can receive information sent from the gas detection device and process the information. The display displays the information. The alarm gives an alarm when harmful gas exceeds standard. Meanwhile, a server controls the filtering and exhaust device to discharge gases. The system can achieve high-sensitivity detection of harmful gases in a production place and during production process and give an alarm when the concentration is abnormal so as to raise the ability of monitoring harmful gases.
Owner:凌工二号(大连)科技有限公司
Compound snow lotus capsules as well as preparation method and device thereof
The invention relates to compound snow lotus capsules as well as a preparation method and device thereof. The preparation method of the compound snow lotus capsules comprises the following steps: first raw materials including vinegar processed rhizoma corydalis, rhizoma et radix notopterygii and the like of the compound snow lotus capsules are decocted with water and filtered, and clear paste is obtained after concentration; a second raw material, namely, herba saussureae involucratae, of the compound snow lotus capsules is extracted with ethanol and filtered, and an extract solution is obtained; the extract solution and the clear paste are mixed, the mixture is left to stand and concentrated, then drying, smashing, sieving and encapsulating are performed, and the compound snow lotus capsules are obtained. Toxicity of aconitine in radix aconiti preparata and radix aconiti kusnezoffii preparata is detected with quail. According to the preparation method of the compound snow lotus capsules, the toxicity of the aconitine in the radix aconiti preparata and the radix aconiti kusnezoffii preparata is detected with a biological test material, a detection result is accurate and reliable, and the safety of the compound snow lotus capsules is improved.
Owner:SINOPHARM GRP XINJIANG PHARMA
Preparation method and application of benzene series visual detection test paper
InactiveCN111693520AWith visual recognitionQuick responseMaterial analysis by observing effect on chemical indicatorPlatinumWhitening Agents
The invention relates to a preparation method and application of benzene series visual detection test paper, and mainly solves the problems of poor selectivity, complex operation and high cost in theprior art. The invention adopts the technical scheme that the preparation method of the benzene series visual detection test paper is adopted; the test paper is prepared by a test paper matrix material supported with a platinum II complex PtII through impregnation (TMSC-triple bond-CPhenC-tripe bond-CTMS) (C-tripe bond-CC6H4F-2)2, and the test paper matrix material is filter paper without a fluorescent whitening agent. The technical scheme well solves the problems, and can be used in preparation of benzene series visual detection test paper.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for detecting content of manganese in sewage by using fluorescent bacteria
The invention discloses a method for detecting the content of manganese in sewage by using fluorescent bacteria, relating to the field of methods for detecting the content of manganese in the sewage and aiming to solve the problems that the traditional method for detecting the content of manganese in the sewage is expensive in equipment, complex in processing, high in cost, large in workload and high in error. The method for detecting the content of manganese in the sewage by using the fluorescent bacteria comprises the steps of: 1, preparing an LB (Luria-Bertani) liquid culture medium; 2, culturing fluorescent bacteria; 3, diluting a bacterial solution; 4, preparing bacterial solutions with different manganese contents and culturing; 5, carrying out fluorescent detection; 6, establishing a rectangular coordinate system and calculating a regression equation; 7, detecting the fluorescent intensity of the bacteria solution containing the sewage to be detected; and 8, working out the manganese content of the sewage to be detected. The method disclosed by the invention is applied to the field of sewage detection.
Owner:NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
Prefabricated pipe pile welding seam quality inspection device and its inspection method
ActiveCN109914493BAvoid mutual interferenceIntuitive detection methodFoundation testingStructural engineeringWeld seam
The invention discloses a prefabricated pipe pile welding seam quality detection device and a detection method thereof. The detection device is equipped with a rubber holster on the outside of each welding seam, and according to the welding seams at different depth positions, thin water injection hoses of corresponding lengths are configured, and the upper ends of each thin water injection hose are connected to the The pressurizing device with the hydraulic gauge on the ground is connected, and the lower ends are respectively wrapped in the rubber sheaths socketed outside the welding seams at different depths. Therefore, pressurize and inject water into the rubber holster at the location of the welding seam through the corresponding water injection thin hose, and then read the reading of the hydraulic gauge after applying a certain pressure, and the quality of the welding seam at the location can be judged according to the change of the reading of the hydraulic gauge . It can be seen that the present invention can detect multiple welding seams of different depths separately, avoiding mutual interference between the welding seams; no hole cleaning operation is required, and the detection efficiency is high and the cost is low.
Owner:HOHAI UNIV
Method for realizing intelligent vision system for synchronous detection of elevator brake spring
ActiveCN109238678ASolve elevator safety hazardsIntuitive detection methodMachine part testingAutomotive engineeringBrake force
The invention relates to a method for realizing an intelligent vision system for synchronous detection of an elevator brake spring, which comprises the following steps: when an elevator inspector periodically detects the brake force of an elevator, an installation detection camera is installed beside an elevator brake device in an elevator machine room, and a camera video signal is transmitted toa computer through a cable; the computer is connected with an elevator brake device control panel through an I / O interface, and an elevator brake signal is obtained; the computer receives informationof an state image of the elevator brake spring, which is automatically and continuously captured by the camera; the action states of the two springs of the left and right brakes of the elevator are detected through an image processing and mode recognizing algorithm in the computer; and the synchronous situation of the elevator brake spring is automatically detected and calculated. The method in the invention realizes accurate detection on reduction of the brake force of the elevator due to incapability of synchronization of the left and right springs of the elevator brake, can find the fatal elevator safety problem of insufficient brake force of the brake in advance and finds causes of problems so as to solve the potential safety hazard of the elevator quickly and accurately.
Owner:沈阳聚德视频技术有限公司
Device and method for detecting temperature characteristics of temperature sensor
InactiveCN101750172BThe detection method is simple and fastIntuitive detection methodThermometer testing/calibrationTemperature controlFurnace temperature
The invention relates to a device and a method for detecting temperature characteristics of a temperature sensor. The device comprises an ohmmeter I, an ohmmeter II, an ohmmeter III, a heating furnace IV, a temperature controller V, a power supply circuit, a temperature sensor A to be measured, a temperature sensor B to be measured, a temperature sensor C to be measured, a sensor for controlling the temperature of the furnace, connectors XP1 / XS1-XP4 / XS4 and a panel. The detection method comprises the following steps of: turning on a power source of the device; presetting the furnace temperature and selecting temperature-raising output voltage; respectively measuring the changes of the temperature sensor A, the temperature sensor B and the temperature sensor C which correspond to the furnace temperature from a low temperature period to a high temperature period, recording a plurality groups of relevant data for the corresponding change of resistance in a table; and thereby analyzing the temperature characteristics of the temperature sensor. The method is simple, direct and directviewing, improves the detection precision and the detection efficiency of data, can save energy and reduce emission, not only can be used for researching the temperature characteristics of the temperature sensor, but also can be used for electricity experiment teaching.
Owner:CHONGQING UNIV
Device and method for detecting dispersing performance of chemical synthesized short fibers
ActiveCN101876139BCompact structureSimple and fast operationInspecting textilesYarnChemical synthesis
The invention discloses a device and a method for detecting the dispersing performance of chemical synthesized short fibers. The device is characterized by being vertically provided with a cylinder; a middle filtering layer is arranged in the cylinder; a stirring shaft for forming a dispersing stirrer is axially arranged above the middle filtering layer; a water inlet pipe which is provided with a water inlet valve and a liquid discharge pipe which is provided with a liquid discharge valve are respectively arranged below the middle filtering layer; the middle filtering layer comprises a filter screen and a filter cloth which is arranged on the filter screen; and an air inlet pipe is radially arranged on the side wall of the cylinder, at the bottom of the stirring shaft and above a middle interlayer. The invention has compact device structure and simple and convenient method operation and can be used for rapidly and accurately detecting various defects of paralleled yarns, sticking yarns, doubling yarns, gommures, and the like existing in the chemical synthesized short fibers by the dispersing situation of the short fibers in water.
Owner:ANHUI WANWEI UPDATED HIGH TECH MATERIAL CO LTD
A Realization Method of Intelligent Vision System for Synchronous Detection of Elevator Brake Spring
ActiveCN109238678BAvoid safety hazardsIntuitive detection methodMachine part testingImaging processingMachine
The invention relates to a method for realizing an intelligent vision system for synchronous detection of an elevator brake spring, which comprises the following steps: when an elevator inspector periodically detects the brake force of an elevator, an installation detection camera is installed beside an elevator brake device in an elevator machine room, and a camera video signal is transmitted toa computer through a cable; the computer is connected with an elevator brake device control panel through an I / O interface, and an elevator brake signal is obtained; the computer receives informationof an state image of the elevator brake spring, which is automatically and continuously captured by the camera; the action states of the two springs of the left and right brakes of the elevator are detected through an image processing and mode recognizing algorithm in the computer; and the synchronous situation of the elevator brake spring is automatically detected and calculated. The method in the invention realizes accurate detection on reduction of the brake force of the elevator due to incapability of synchronization of the left and right springs of the elevator brake, can find the fatal elevator safety problem of insufficient brake force of the brake in advance and finds causes of problems so as to solve the potential safety hazard of the elevator quickly and accurately.
Owner:沈阳聚德视频技术有限公司
Weak signal detection method based on Lu system
InactiveCN104268630BEasy to detectIntuitive detection methodChaos modelsNon-linear system modelsPhase spaceComputer science
The invention discloses a weak signal detection method based on a Lu system and relates to the technical field of signal detection methods. The method comprises the following steps that parameters of the Lu system are set to be a=36 and b=3; the value of a parameter c is determined, wherein the value of c is a critical value at which the Lu system is in a fixed point state, the value of c is determined through an equation and regulated from small to large, changes of an output y and a phase space of the Lu system are observed in the regulating process, and the value at which the fixed point state of the Lu system changes is used as the value of c; weak periodic signals are monitored through the Lu system with the determined parameters, and if a phase track is not in the fixed point state, it is judged that the weak periodic signals exist. According to the method, the Lu system is adopted, so that weak signals are recognized more easily, and the reliability is higher.
Owner:SHIJIAZHUANG TIEDAO UNIV
Waterproof fabric detection device before fabric determination in garment factory
ActiveCN111122412BIntuitive detection methodImprove functionalityPermeability/surface area analysisRotation - actionStructural engineering
Owner:海宁市欧梦服饰有限公司
Investigating method of spore individual number
InactiveCN1869647AThe detection method is simpleIntuitive detection methodMicrobiological testing/measurementMaterial analysisMicro imagingPlant spore
The invention relates to a plant spore number detecting method, especially determination of alga spore number, characterized in using micro imaging to record spore states in unit water body or substrate segment, inputting and storing the spore states into a computer, outputting paper records by printer and then according to the paper records, counting the spores and obtaining the spore number.
Owner:孙庆海
A detection method for the equivalent thickness of the oxide layer on the surface of ultrafine aluminum powder particles
InactiveCN104075682BThe detection method is simpleIntuitive detection methodParticle size analysisEquivalent oxide thicknessEndotherm
The invention provides a method for detecting the equivalent thickness of the oxide layer on the surface of ultrafine aluminum powder particles. By performing X-ray structure detection on ultrafine aluminum powder samples and analyzing oxide species according to the PDF atlas, it is determined that the oxide layer in the aluminum powder particles is Existence of aluminum species; particle distribution detection of aluminum powder, each sample is tested three times to determine the volume average diameter D of aluminum powder; respectively detect the heat absorption value △H of the raw material 1A99 industrial pure aluminum in the heating process 0 and the heat absorption value △H of the prepared aluminum powder in the heating process, according to the thermodynamic characteristics of the phase transition, determine the mass percentage content of alumina in the aluminum powder particles and the heat absorption value △H0, the heat absorption value △ The relationship between H; the equivalent thickness of the oxide layer is calculated according to the particle structure of the aluminum powder and the mass percentage of alumina. The detection method of the invention is simple and intuitive, conforms to the production process and has high precision.
Owner:JIANGSU UNIV
A three-dimensional structure detection method of optical fiber splicing point based on digital holographic tomography
ActiveCN107036786BData acquisition is simpleEasy to storeMaterial analysis by optical meansOptical apparatus testingDigital reproductionDigital holographic microscopy
The invention discloses a three dimensional structure detection method of a fiber welding point, based on digital holographic tomography. Based on the digital holographic tomography technology, the fiber welding point three dimensional structure detection method based on digital holographic tomography performs digital reconstruction and correction of axial error on the fiber welding point hologram which is obtained through measurement of the digital holographic technology, by taking different reproduced distances, so as to obtain the phase diagrams of the welding fiber under each angle, and then performs horizontal correction, vertical correction and image inclination correction of rotation deviation on each phase diagram to obtain the phase diagrams that the positions of the fiber welding points are consistent under each angle, and finally utilizes the tomography back projection filtering algorithm to reconstruct the three dimensional structure of the fiber welding points. The three dimensional structure detection method of a fiber welding point, based on digital holographic tomography can realize correction of the rotation deviation as the data processing process is fully digitalized, has the advantages of high precision, no damage and three dimensional quantitative determination, and can be used for detecting the quality of fiber welding, based on the digital holographic tomography technology.
Owner:深圳市前海誉卓科技有限公司
Vehicle driving state evaluation method based on overtaking frequency
ActiveCN110412556AIntuitive detection methodEfficient detection methodSatellite radio beaconingResourcesVehicle drivingWave radar
The invention provides a vehicle driving state evaluation method based on the overtaking frequency. The method comprises the following steps that 1, through a millimeter wave radar, and vehicle targets which have overtaking behaviors on driving vehicles of lanes on the two sides are obtained; 2, through a GPS tachymeter, the vehicle speeds of the driving vehicles are obtained, and vehicle targetsovertaken by the driving vehicles of the lanes of the two sides are obtained; 3, according to the vehicle targets which have the overtaking behaviors on the driving vehicles of the lanes on the two sides and are acquired in step 1 and the vehicle targets overtaken by the driving vehicles and acquired in step 2, the overtaking frequency is obtained; 4, a fuzzy judgement set based on the overtakingfrequency is established, threshold values of evaluation values of the driving vehicle states under different working conditions are set, a rule base rule is applied to inference with credibility, andthe safety performance of the vehicles is comprehensively evaluated. The method is high in real-time performance, reliability and practicability, has no interference, and can effectively evaluate thedriving states of the vehicles in real time.
Owner:JILIN UNIV
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