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53results about How to "Filter effects" patented technology
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Method for correcting text image
ActiveCN101833648ASelf-adaptiveFilter effectsCharacter and pattern recognitionOptical character recognitionPoor quality
The invention discloses a method for correcting a text image and belongs to the field of optical character recognition. The method comprises the following steps of: positioning a character zone in the text image and extracting suspected characters; recognizing the suspected characters, wherein if the recognition reliability is higher than the reliability reference value of a single character, the effective direction of the characters is positive, otherwise, the suspected characters are rotated counterclockwise respectively for judging the effective direction; extracting and sending the characters having the effective direction to an effective character set; extracting the corresponding text direction until the accumulated value of the recognition reliability in a certain direction is higher than the predetermined recognition reliability; correcting the direction of the image and recognizing and outputting the text image. The method effectively eliminates the influence from unreliable characters, prevents the unreliable zone in the character zone from influencing the judgment of the character direction, is well suitable for the text images having complexity or noise or poor quality and can judge the direction of a text image fast and correctly so as to effectively recognize the text image.
Owner:武汉融冠科技发展有限公司
Hand action identification method based on surface electromyography decomposition
ActiveCN104899594AReduce in quantityImprove practicalityCharacter and pattern recognitionQR decompositionHand parts
The invention relates to a hand action identification method based on surface electromyography (sEMG) decomposition. The method comprises the following two parts including sEMG decomposition and a hand action identification method based on MUAPT (motor unit action potential train), wherein the sEMG decomposition is carried out to obtain the MUAPT and consists of sEMG signal preprocessing, sEMG peak detection and Gaussian mixture model (GMM) clustering; and the hand action identification based on the MUAPT comprises characteristic extraction, principal component analysis (PCA) dimensionality reduction, LDA (Linear Discriminant Analysis) classification and the like. Under a condition that only one channel sEMG is used, motor unit action potential information obtained by the sEMG signal decomposition is used for identifying hand action, an identification rate of single-channel sEMG is effectively improved, and the hand action identification method has important theoretical significance and practical application value.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Touch screen with infrared rays transmitted inside screen body and method for identifying touch points
ActiveCN102622135ASolve the problem of suspension heightAchieve borderlessInput/output processes for data processingInfraredTouchscreen
The invention discloses a touch screen with infrared rays transmitted inside a screen body and a method for identifying touch points. In the touch screen, the infrared rays sent out by an infra-red emission unit ripe into the touch screen body, are totally reflected by an upper reflecting surface and a lower reflecting surface inside the touch screen body, and are transmitted into the infrared receiving unit. According to the invention, the infrared rays are transmitted inside the touch screen body by using the total reflection principle, and a touch body is enabled to be clung to the surface of the touch screen to generate touch response, so that the problem of touch floating height is solved; and since the infrared rays are transmitted inside the touch screen, the infra-red emission unit is not required to be placed on the surface of the touch screen. Therefore, an edge frame free touch screen is realized.
Owner:GENERALTOUCH TECH
Facial paralysis patient acupuncture treatment effect detection visual system and method based on surface myoelectricity
ActiveCN104545906AExclude the influence of subjective factors such as clinical feelingsRealize quantitative and objective evaluationDiagnostic recording/measuringSensorsAcupuncture treatmentPrincipal component analysis
The invention relates to a facial paralysis patient acupuncture treatment effect detection visual system and method based on surface electromyogram (sEMG). The system consists is constructed by connecting a sEMG signal acquiring electrode, a sEMG signal amplifier, a sEMG signal AD (Analog to Digital) converter, a sEMG signal analyzing device and a display in sequence. The method comprises the following steps: acquiring a sEMG signal; amplifying the sEMG signal through the sEMG signal amplifier; transmitting the amplified sEMG signal to the sEMG signal analyzing device through the sEMG signal AD converter for preprocessing; extracting time domain and frequency domain features to construct a feature vector; reducing the dimension of the feature vector by adopting a PCA (Principal Component Analysis) method; calculating a type center distance between a health side and a patient side by using a kmeans clustering method; fitting the type center distance to obtain an AR model; predicting the recovery trend of the patient. By adopting the facial paralysis patient acupuncture treatment effect detection visual system and method, the recovery degrees of muscles on both sides of the face of a facial paralysis patient can be detected accurately under the conditions of freeness from wounds and convenience, the recovery trend of the patient is further predicted, and an auxiliary reference index is provided for clinical treatment of doctors and the rehabilitation effect evaluation of the patient.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Pain quantitative analysis system and method based on human body physiological signal multi-parameter fusion
InactiveCN104887198ARealize objective and quantitative evaluationFilter effectsSurgeryDiagnostic recording/measuringAudio power amplifierDisplay device
The invention relates to a pain quantitative analysis system and method based on human body physiological signal multi-parameter fusion. The input end of a signal amplifier is connected with a BVP, ECG and SG signal collecting electrode, and corresponding physiological signals of a human body are collected; the output end of the signal amplifier is connected with the input end of a signal AD converter, and the obtained signals are amplified through the signal amplifier; the output end of the signal AD converter is connected with the input end of a signal analysis device, and analog signals are converted into digital signals and then sent to the signal analysis device; a display is connected with the output end of the signal analysis device and receives and displays the signals sent by the signal analysis device. Various physiological signals of the human body are collected, the human body pain intensity is objectively quantized through a mode recognition means, and the system and method have wide application prospects.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Ultrasonic signal processing method based on auto-encoder
ActiveCN109858408AEffectively filter out the influenceFilter effectsCode conversionCharacter and pattern recognitionFeature extractionSonification
The invention discloses an ultrasonic signal processing method based on an auto-encoder. The method includes preprocessing an ultrasound signal, and then superposing samples of the ultrasonic signals,establishing and classifying a sample library of the ultrasonic signals, compressing and decompressing the ultrasonic A scanning signals through an automatic encoder established through a neural network, obtaining related weights and bias variables of the feature functions based on deep learning, and performing noise reduction processing on subsequent ultrasonic signals by taking the related weights and bias variables as noise reduction parameters. The method is good in signal noise reduction screening compatibility, small in operand and low in calculation cost, and the feature extraction accuracy of the noise reduction auto-encoder is improved.
Owner:XI AN JIAOTONG UNIV
Square-module-type fiber fixed-disc filtering machine
ActiveCN102671440AAvoid mechanical propertiesAvoid lossStationary filtering element filtersFiberComputer module
The invention discloses a square-module-type fiber fixed-disc filtering machine. The square-module-type fiber fixed-disc filtering machine comprises a plurality of module combining filtering discs (1), water collecting hoppers (2) and a main water collecting groove (3), wherein the module combining filtering discs (1) are arranged in a filtering pond; all the module combining filtering discs (1) are respectively provided with a plurality of square unit modules (6), and are arranged in parallel; a water feeding pipe (7) penetrates through the combining filtering discs; the bottom of the filtering pond below all the combining filtering discs (1) are respectively provided with one water collecting hopper (2); all the water collecting hoppers (2) are internally and respectively provided with a slot for fixing the combining filtering discs (1); and the water outlets of all the water collecting hoppers (2) are respectively connected with the main water collecting groove (3). The square-module-type fiber fixed-disc filtering machine disclosed by the invention has the advantages that energy conservation and consumption reduction are realized; the plurality of filtering discs of different specifications can be produced by one mold, and wider application is realized; a great amount of complex mechanical friction and loss are avoided, and the service life is effectively prolonged.
Owner:YIXING NUOWEI ENVIRONMENTAL PROTECTION EQUIP +2
Fast recognition system and method for power system fault current
InactiveCN103308749AFilter effectsEasy to handleElectrical testingAc/pulses peak value measurementsElectric power systemPeak value
The invention relates to a fast recognition system and method for power system fault current. Signals for current in a circuit and current change rate transient value are sampled in real time, so that a first characteristic signal in direct proportion to current first-order differential and a second characteristic signal in direct proportion to current second-order differential are obtained; the two characteristic signals at a same time point are calculated according to the theory of trigonometric function, so that the peak of steady-state short-circuit current is obtained. The fast recognition system and method for power system fault current has the advantages that the differential value of short-circuit current is used for calculation, so that the effect of aperiodic components upon calculation results is effectively filtered; short-circuit current can be recognized quickly and quantitatively for less than 3ms of response time; quantitative recognition is convenient for classifying short-circuit faults according to short-circuit levels.
Owner:STATE GRID CORP OF CHINA +1
Environment-friendly foam breaker production filtering equipment
InactiveCN111389091AImprove filtration efficiencyEffect of filtration efficiencyFiltration circuitsFoam dispersion/preventionStructural engineeringMechanical engineering
Owner:CHONGQING JIAOTONG UNIVERSITY
CMOS single stabilization circuit
InactiveCN1996751AFilter effectsImprove anti-interference abilityElectric pulse generatorCMOSSchmitt trigger
This invention relates to one CMOS signal stable circuit, which comprises integral circuit, three status circuit and its control circuit and logic output circuit, wherein, the control circuit generates control signals with input end, zero clear end and output end; the three status control circuit adopts two Smite trigger for sample on integral circuit to generate three status circuit needed control signals by sample result; the two Smite trigger generates output signals through logical computation.
Owner:BEIJING MXTRONICS CORP +1
Industrial bag-type dust collector
InactiveCN111729425AInhibit sheddingFilter effectsDispersed particle filtrationTransportation and packagingEngineeringDust control
The invention relates to the technical field of cloth bag dust removal, and concretely relates to an industrial bag-type dust collector. The dust collector comprises a dust removal box, a dust removalmechanism is fixedly connected to the inner wall of the upper end of the dust removal box, a blocking mechanism is fixedly connected to the inner wall of the lower end of the dust removal box, a linkage mechanism is fixedly connected to the upper surface of the blocking mechanism, a connecting rod is driven to rotate through an arranged turntable, the connecting rod drives a clamping strip to rotate, the clamping strip is clamped in a clamping groove, a lifting block is driven to rotate through the clamping strip and the clamping groove, the lifting block drives a round block to rotate, the round block drives a dust baffle to rotate, when a fixing rod is in contact with a first stop lever, the dust baffle blocks a dust falling hole, when the fixing rod makes contact with a second stop lever, the dust baffle is moved away from the upper end of the dust falling hole, then falling dust can be swept into the dust falling hole through rotation of the dust baffle, then the dust falling holeis blocked through the dust baffle, the dust is prevented from being driven by waste gas to move into a cloth bag again, and the filtering efficiency of the waste gas is prevented from being affectedby the cloth bag.
Owner:沈金鹏
SOC prediction method and system based on strong tracking algorithm and adaptive Kalman filtering
InactiveCN112684348AImprove anti-interference abilityGood followabilityElectrical testingTest batteryElectrical battery
The invention discloses an SOC prediction method and system based on a strong tracking algorithm and adaptive Kalman filtering. The method comprises the following steps: carrying out the charging and discharging experiment of a to-be-tested battery under different working conditions, and recording the experiment data; performing parameter identification on the experimental data, and constructing an SOC estimation state equation and a measurement equation; optimizing the improved adaptive Kalman filtering algorithm by adopting a strong tracking algorithm; correcting the noise of the state model and the measurement model by adopting an optimized adaptive Kalman filtering method; and predicting the SOC of the battery by using the corrected state model and the measurement model. According to the invention, the adaptive Kalman filtering algorithm can overcome the working condition that the environmental noise is non-Gaussian white noise; and the strong tracking algorithm is applied to SOC calculation, so that an estimation result can be quickly followed under an emergent working condition.
Owner:SHANDONG UNIV
Unmanned aerial vehicle mooring cable intelligent fuzzy collecting and releasing system
The invention provides an unmanned aerial vehicle mooring cable intelligent fuzzy collecting and releasing system. The system comprises a driving and control circuit module, an unmanned aerial vehicleflight control communication module connected with the driving and control circuit module, a pressure sensing module used for collecting real-time tension on a mooring cable of the unmanned aerial vehicle, a take-up and pay-off coil, a transverse stepping motor, a take-up and pay-off synchronous motor, an electronic clutch, an angle sensor, a one-way rotating shaft and an electronic damper used for preventing the cable disorder state of the cable due to the inertia rotation of the pay-off coil in the paying-off process. According to the system, a fuzzy control technology and a corresponding electromechanical hybrid system are adopted, and the intelligent take-up and pay-off cable of the mooring unmanned aerial vehicle is divided into two parts, namely an intelligent paying-off cable and an intelligent take-up cable, and the various uncertain flight attitude conditions can be brought to the multi-rotor unmanned aerial vehicle under a harsh environment and environment changes, the intelligent take-up and pay-off control of the cable is realized stable.
Owner:ANYWAVE COMM TECH
Air filter for new energy vehicles
InactiveCN108554101AFilter effectsAvoid harmCombination devicesAir-treating devicesFiberAir filtration
The invention discloses an air filter for new energy vehicles. The air filter comprises a water tank and an air filter body, wherein an air conveying pipe is connected with the middle part of the topof the air filter body; a suction fan is connected with one end of the air conveying pipe; and the bottom of the suction fan is connected with an air inlet. According to the invention, the air filteris provided with a carbon fiber mesh, a primary filtration component, an electrostatic adsorption component, a deodorizing component, a purifying component and a corrugated cotton layer from top to bottom, can separately filter different harmful substances contained in the air, has more obvious and outstanding filtering effect, and effectively prevents harmful substances in the air from entering acompartment via a heated air outlet and from causing harm to people; and a non-paper filter layer is used, so the influence of easy damage of filter layers on air filtration effect can be avoided.
Owner:WUHU SUNYANG INFORMATION CONSULTATION
Method and device for measuring resistive currents of metal oxide arresters
InactiveCN106353557AReflect the operationFilter effectsCurrent/voltage measurementElectric power systemEngineering
The invention relates to a method and device for measuring the resistive current of a metal oxide arrester. The method includes: 1) collecting the three-phase current signal and the corresponding voltage signal when the arrester operates stably; 3) Calculate the average value of the phase angle of the three-phase current and voltage signals, and use it as the initial value of the phase angle of the three-phase current and voltage signals; 4) Correct the initial value of the phase angle of the three-phase current and voltage signals to obtain the three-phase 5) According to the phase angle correction value of the three-phase current and voltage signals, the three-phase resistive current of the metal oxide arrester is calculated. The device of the invention includes a current and voltage acquisition module, a current and voltage signal processing module, a phase angle correction module and a three-phase resistive current calculation module. The invention effectively filters the influence of phase-to-phase and space interference on the resistive current, thereby truly reflecting the operation state of the MOA and ensuring the safe operation of the power system.
Owner:XUJI GRP +4
Efficient sewage recovery treatment device
InactiveCN113443763ANo cloggingImprove filtering effectMultistage water/sewage treatmentWater/sewage treatment by heatingSludgeFiltration
The invention discloses an efficient sewage recovery treatment device which structurally comprises a filter cartridge, a filter cartridge base, a liquid inlet pipe, a communicating pipe, a first stirring device, a cleaning assembly, a multi-stage filter screen, a sewage discharge device, a liquid purification barrel, a liquid purification barrel base and a second stirring device. The efficient sewage recovery treatment device has the following beneficial effects, sewage is subjected to large-particle primary filtration through the coarse filter screen on the stirring blades, then is subjected to multi-stage filtration through the multi-stage filter screen, and filtered water is extracted through the cleaning device and is used for cleaning the first layer of filter screen of the multi-stage filter screen through the spray head, so that the beneficial effect of improving the filtering efficiency is achieved; the liquid purifying cylinder and the second stirring device are additionally arranged, and residual organic matters in purified water are decomposed by adding the medicine and utilizing the second stirring device, so that the beneficial effect of reutilization is achieved; the sewage discharge device is arranged in the filter cartridge base, so that sludge is discharged in a centralized manner, and the beneficial effects of timely and centralized discharge treatment of the sludge and blockage prevention are achieved.
Owner:泉州市洛江奎芳保洁有限公司
Multiple super-order analysis method for vibration signal feature extraction
InactiveCN109612726AFacilitate fault feature extractionFilter effectsMachine part testingSubsonic/sonic/ultrasonic wave measurementMean squareFeature extraction
The invention discloses a multiple super-order analysis method for vibration signal feature extraction. The multiple super-order analysis method for vibration signal feature extraction comprises the following steps that 1, an extreme value of a to-be-processed original time series is acquired; 2, an extreme value increment series of the original series is calculated; 3, a mean value removing series of the time series is constructed; 4, the mean value removing series is divided into 2Ns intervals in the positive and negative directions according to the time scale length; 5, high-order polynomial tendency fitting is conducted on each interval; 6, a mean square error of data of each interval is calculated; 7, fluctuation functions are calculated for all the intervals; 8, the time scale is changed, the steps from 4 to 7 are repeated, and a generalized Hearst index is acquired; and 9, a singular index and a multiple fractal singular spectrum are calculated, and feature points are extractedto serve as signal features. The multiple super-order analysis method for vibration signal feature extraction has the advantages that fluctuation and impact features in original signals are highlighted, and the multiple fractal features of the nonstationary time series are effectively analyzed.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Longitudinally-curved tree-barrier cleaning air robot
PendingCN108551907AImprove cleaning efficiencyReduce slippageCuttersMotor driven pruning sawsLongitudinal planeDrive motor
The invention discloses a longitudinally-curved tree-barrier cleaning air robot. The air robot comprises a platform support and a working cutter, wherein the platform support is symmetrically connected on the machine body, a plurality of rotor components are connected on the platform support, the working tool is connected with a cutter motor, the cutter motor is fixedly connected with the front end of the working arm, and the working arm is provided with a longitudinally-curved joint for driving the built-in driving motor which is curved in the longitudinal direction. According to the air robot, the rotor assembly is arranged on the machine body and a longitudinally-curved joint is arranged on the working arm, so that the working arm can be bent in the longitudinal plane, the working cutter is perpendicular to the branch to be cleaned, the cleaning efficiency of the tree barrier is effectively improved, the tool slippage is reduced. Since the tree barrier is cleaned by the air robot with high efficiency, the operator is prevented from being close to the high-voltage transmission line at the tree barrier. which is much safer for operation. The air robot can effectively reduce the operation risk, and solves the problems of low manual cleaning efficiency and high safety risk in the prior art.
Owner:GUIZHOU POWER GRID CO LTD
System and method for quick recognizing fault current in power system
InactiveCN104880638AFilter effectsMeet the needs of engineering applicationsElectrical testingSignal conditioning circuitsElectric power system
Disclosed is a system and method for quick recognizing fault current in a power system. The system for quick recognizing fault current in the power system includes a power supply connected to a load via a switch. A current sensor is arranged on an incoming line of the load. The current sensor transfers a detected current signal, which is subjected to pre-treatment of a signal regulating circuit, to a signal processing device for numerical value sampling. A peak value of a current periodic component is obtained through a sampled numerical value. The signal processing device compares the peak value with a pre-set value, and controls the switch according to the comparative result. The method comprises: continuously performing sampling of an input current signal in an equal time interval through the signal processing device to obtain a current discrete value sequence; selecting a plurality of sampled values in fixed time interval from the sequence; performing mathematical calculation of difference value and trigonometric function of the selected values to obtain the peak value of the current periodic component; comparing the peak value with the pre-set value; and if the detected peak value is larger than the pre-set value, controlling the switch to be off. According to the invention, the fault current can be quickly recognized, and the cost is saved.
Owner:STATE GRID CORP OF CHINA +2
Cell model and constructing method thereof, and applications of cell model in screening active substances targeting serotonin receptor
InactiveCN108570450ASensitive screeningFilter effectsCompound screeningApoptosis detectionSerotoninResponse element
The invention discloses a cell model for stably expressing a 5-HT1B (serotonin) gene, and a constructing method thereof, and applications of the cell model in screening of active substances targeting5-HT1BR (serotonin receptor), particularly in screening of anti-depression drugs and anti-migraine drugs, wherein the cell model is mammalian cells capable of carrying and stably expressing the 5-HT1Bgene. The constructing method comprises: linking a 5-HT1B gene to an expression vector to construct recombinant plasmid, introducing the recombinant plasmid into mammalian cells, and carrying out screening culture to obtain the cell line capable of stably expressing the 5-HT1B gene, wherein the cell line can be used for screening the active substance targeting 5-HT1BR. According to the present invention, whether the to-be-screened substance is screened is judged by determining the yield or the activation degree of the response element after the to-be-screened substance is added to the cell model culture medium, such that the high-throughput, low-cost and accurate screening of the active substance targeting 5-HT1BR can be achieved, and the good stability and the good reliability can be achieved.
Owner:EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH
Cutting fluid recycling device for high-grade numerical control machine tool
PendingCN113695080APrevent fallingAvoid affecting working hoursMagnetic separationMaintainance and safety accessoriesNumerical controlEngineering
The invention relates to a recycling device, and especially relates to a cutting fluid recycling device for a high-grade numerical control machine tool. The technical problem of the invention is to provide the cutting fluid recycling device for the high-grade numerical control machine tool can quickly remove scrap iron in cutting fluid. The cutting fluid recycling device for the high-grade numerical control machine tool comprises a first fixing plate, a collecting annular plate, a leakage plate, a first filtering plate, an annular plate cover, an oil inlet mechanism and a magnetic attraction mechanism, the collecting annular plate is arranged at the top of the first fixing plate, the leakage plate is arranged at the top of the collecting annular plate, the first filtering plate is arranged at the top of the leakage plate, and the annular plate cover is arranged at the top of the first filtering plate. The oil inlet mechanism is arranged at the top of the annular plate cover, and the magnetic attraction mechanism is connected between the collecting annular plate and the first fixing plate. Under the magnetic attraction action of a powerful magnet, tiny scrap iron in the cutting fluid can be attracted out, so that the cleaning effect is better.
Owner:东莞市技师学院
Waste gas filtering device and treatment equipment
PendingCN113144780AGuaranteed filtering effectFilter effectsDispersed particle filtrationTransportation and packagingProcess engineeringMechanical engineering
The invention is suitable for the technical field of boiler waste gas treatment, and provides a waste gas filtering device which comprises a filtering shell, wherein an annular filtering net and an annular partition plate which are sequentially distributed from inside to outside are coaxially arranged in an inner cavity of the filtering shell; the area between the filter shell and the annular partition plate is divided into an air outlet cavity and an air inlet cavity by the two groups of baffles; the area between the annular partition plates is divided into a second filter cavity and a first filter cavity; a cleaning assembly, when the annular partition plate rotates, the baffles of the cleaning assembly clean the filtering surface of the annular filter screen. The invention further discloses waste gas treatment equipment which comprises the waste gas filtering device. The equipment further comprises a treatment shell, and the waste gas filtering device is detachably and fixedly arranged on the treatment shell. The waste gas filtering device provided by the embodiment of the invention has a good and efficient filtering effect on boiler waste gas; the waste gas treatment equipment provided by the embodiment of the invention can fully utilize heat in boiler waste gas.
Owner:郑仕山
Parallel color confocal flatness measuring system
InactiveCN111426287AAvoid lateral crosstalkFilter effectsUsing optical meansColor imageBeam splitter
The invention discloses a parallel color confocal flatness measuring system. In the system, a spectroscope is arranged on an emergent light path of a multicolor light source; a flexible optical fiberbundle formed by a plurality of optical fibers arranged according to a set arrangement mode is arranged on an emergent light path of the spectroscope; a micro-dispersion lens array formed by a plurality of micro-dispersion lens units arranged according to a set arrangement mode is coupled with an emergent end of the flexible optical fiber bundle; an object to be measured is arranged on an emergentlight path of the micro-dispersion lens array such that the dispersed light with different wavelengths is focused at different positions; the object to be measured reflects light reaching a surface of the object to be measured to the spectroscope; a small hole array arranged according to a set arrangement mode is arranged on a reflection light path of the spectroscope so as to transmit light focused on a surface of an object to be measured; and a color camera shoots light penetrating the small hole array to obtain a color image, and then the flatness, the curvature and the warping degree of the surface of the object to be measured are determined. According to the invention, multi-point parallel measurement can be realized, and the measurement efficiency of the flatness of the object to bemeasured is improved.
Owner:HUAQIAO UNIVERSITY
Hand motion recognition method based on surface electromyography signal decomposition
ActiveCN104899594BReduce in quantityImprove practicalityCharacter and pattern recognitionFeature extractionDecomposition
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Test system and method for distortion parameters of AC voltage of aviation variable frequency power supply system
The invention discloses a test system and method for distortion parameters of an AC voltage of an aviation variable frequency power supply system. The system comprises a distortion test signal conditioning circuit and a PXI bus system. The distortion test signal conditioning circuit comprises wiring terminals, attenuators, filters, comparators, phase-locked loop circuits, signal generators, and subtraction circuits. An AC signal is subjected to the distortion test signal conditioning circuit to obtain a variable frequency AC distortion voltage. The PXI bus system comprises a PXI-1065, a zero-slot controller, a PXI-6115 capture card, a shielded cable, an integrated display, a keyboard, and a mouse. The PXI bus system is used for capturing the variable frequency AC distortion voltage for analysis and processing. The test system and method have the advantages of solving the problem that the frequency resolutions of different frequency segments are different, effectively filtering out theinfluence of fundamental components on harmonic components when the fundamental frequency is changed, and ensuring the accuracy of each frequency component in the frequency spectrum analysis.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Monitor and irregular pulse rate identification method thereof
PendingCN112294271AFilter effectsDiagnostic recording/measuringSensorsComputer visionArtificial intelligence
The application provides an irregular pulse rate identification method. The irregular pulse rate identification method comprises the following steps: collecting a first physiological signal of a testee, wherein the first physiological signal at least includes pulse information; collecting a second physiological signal of the same testee, wherein the second physiological signal at least includes respiration information; obtaining pulse feature information according to the first physiological signal; obtaining respiration feature information according to the second physiological signal; filtering the first physiological signal according to the relationship between the respiration feature information and the pulse feature information, to filter off interference generated by respiration in thefirst physiological signal to obtain a filtered pulse wave signal; and identifying fluctuation rhythm information of a pulse wave according to the filtered pulse wave signal. The application furtherdiscloses a monitor. The irregular pulse rate identification method can filter off the influence of respiration on the pulse through adaptive filtering, and the irregular pulse rate identification accuracy is high.
Owner:SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
Diesel engine fuel filter and processing technique thereof
InactiveCN109083781AImprove structural strengthEasy to fixMachines/enginesLiquid fuel feedersFuel filterPulp and paper industry
The invention discloses a diesel engine fuel filter. The diesel engine fuel filter comprises a protective shell, wherein a filter body is arranged on the middle portion of an inner cavity of the protective shell, and a seal end cover is mounted at the top of the upper end of the protective shell. The seal end cover is provided with fuel feed holes, and the filter body includes an upper end cover,a lower end cover and filter paper. The filter paper is fixed between the upper end cover and the lower end cover. A vertical plate is arranged on the right side of the upper end of the lower end cover, and the upper portion of the vertical plate is movably connected to the right end of the upper end cover by a hinge pin. The filter paper is internally provided with a spiral reinforcing rib. The filter paper is uniformly folded in the own circumferential direction to form a cylindrical tubular structure, and the structural strength of the filter paper is improved; fixing of the filter paper isstable, and the filter body is convenient to disassemble and install; and the spiral reinforcing rib has elasticity so that the filter paper cannot be pressed to generate deformation after being installed between the upper end cover and the lower end cover, and in this way, the filtering effect of the filter paper can be kept unaffected.
Owner:全椒县全动机械有限公司
Air purification system
InactiveCN106918090AImprove filtering effectFilter effectsMechanical apparatusLighting and heating apparatusActivated carbon filtrationEngineering
The invention discloses an air purification system. The air purification system comprises a shell, wherein a left fixed shell and a right fixed shell are arranged at left and right sides in the shell respectively; an extending pipe is arranged at the outer side of an air hole; a second filter screen group and a first filter screen group are mounted at left and right sides in a movable frame respectively; binding hoops are arranged connecting parts of a connecting pipe, and a first sealing sleeve and a second sealing sleeve. According to the air purification system disclosed by the invention, the first filter screen group and the second filter screen group are matched and gas is subjected to first-step filtering when the foul gas passes through a nylon filter screen, a metal filter screen and an active carbon filter screen, so that dust and undesirable odor in the foul gas are removed; when the foul gas passes through a primary-efficiency filter screen, a medium-efficiency filter screen and a high-efficiency filter screen, the dust in the foul gas is completely filtered and the filtering efficiency of the foul gas is improved; meanwhile, the connecting pipe is mounted on the first sealing sleeve and the second sealing sleeve through the binding hoops and a condition that the filtering effect is influenced, caused by the fact that the gas leaks, is avoided.
Owner:陈麒如
Stacked type filtering and pouring system
PendingCN109248991AImprove filtering effectFilter effectsFoundry mouldsFoundry coresEngineeringFilter effect
The invention discloses a stacked type filtering and pouring system. The stacked type filtering and pouring system comprises an upper box mold, a lower box mold and a stacked type filtering component,wherein a vertical pouring channel is formed in the upper box mold; a horizontal pouring channel communicated with the vertical pouring channel is formed between the lower surface of the upper box mold and the upper surface of the lower box mold; the stacked type filtering component comprises two or more rectangular filter screens which are stacked together; first filter screen holes are uniformly distributed in the filter screens; the first filter screen holes in two adjacent filter screens are staggered from each other; the two adjacent filter screens are isolated from each other through asupport gasket component; the filter screens and the support gasket components are bonded to together; the support gasket components are respectively arranged at four corners of the filter screens; each support gasket component is formed by bonding one or more support gaskets which are stacked together. Through the stacked type filtering and pouring system, metal liquid is filtered before enteringa casting cavity; meanwhile, the filtering effect is good.
Owner:安徽应流铸业有限公司
Lifting rib and clothes processing equipment
PendingCN114438732AGood filtering effectEasy to cleanOther washing machinesTextiles and paperStructural engineeringMechanical engineering
The invention provides a lifting rib which comprises a shell, a through hole for water to flow in and out is formed in the shell, a hollow inner cavity is formed in the shell, and a comb-tooth-shaped filtering structure is arranged in the inner cavity. Compared with a filter screen arranged in the lifting rib in the prior art, the comb-tooth-shaped filter structure arranged in the lifting rib has the advantages that a better filtering effect on water flow in the washing cylinder can be achieved, the comb-tooth-shaped filter structure is not prone to blockage of thread scraps and other impurities on the comb-tooth-shaped filter structure, the filtering effect can be guaranteed, and the comb-tooth-shaped filter structure is more convenient to clean. The invention further provides clothes processing equipment. The lifting rib is arranged on the inner wall of a washing drum of the clothes processing equipment.
Owner:QINGDAO HAIER DRUM WASHING MACHINE +1
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