Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
40results about How to "Improve filtering ability" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Intelligent non-linearity PID controlling parameter tuning based on self-adapting ant colony
InactiveCN101118421AImprove filtering abilityImprove robustnessAdaptive controlNonlinear pid controllerPerformance index
The present invention provides a non-linear PID control parameter setting method based on self adaptive ant colony intelligent. The method includes the steps as follows: first, the optimum relation range of undetermined coefficient in a non-linear PID controller; second, a gridding is made in a variable region which is divided into a plurality of space regions; third, an initial parameter and a taboo table index indicating hand, every two ants are used as a partner to choose a certain node as the starting point; fourth, two ants choose the optimum relation space node according to the state transition probability and go forwards; fifth, the taboo table index indicating hand is amended, according to the route passed by the ants, the non-linear PID control undetermined coefficient corresponding to the route is calculated, and the objective function corresponding to the ants is calculated, as well as the ITAE minimal performance index in the cycle period is recorded; finally, the non-linear PID control parameter corresponding to the minimal performance index is stored in a control coefficient, at the same time, the pheromone residual coefficient adjusted in the self-adaption way, and the pheromone rail on each route is renovated. The steps are circled till an optimum result is obtained.
Owner:BEIHANG UNIV
Automatic switching device for optical filter of camera head
Owner:惠州龙德科技股份有限公司
Palm print database search method based on quantum algorithms
InactiveCN102955855AImprove integrityWith parallel computing characteristicsImage analysisSpecial data processing applicationsPalm printFeature extraction
The invention provides a palm print database search method based on quantum algorithms. Four different quantum algorithms are respectively used in the three most important stages of palm print recognition. The search method comprises the following steps that 1, a palm print image is filtered by a quantum adaptive median filtering algorithm, and a fact can be observed from a filtering effect contrast chart that a better filtering effect can be obtained by the quantum adaptive median filtering algorithm utilized in the invention than a classic algorithm; 2, the characters of the palm print image are extracted by quantum Fourier conversion based on quantum parallelism, all palm print characters can be extracted by only one quantum Fourier conversion operation, and an analysis result shows that the extraction speed of the palm print characters is raised by the algorithm under the condition of well reserving palm print details; and 3, the palm print image is matched by a quantum set operation and a Grover algorithm. In comparison with the classic algorithm which requires N times of operation, the matching algorithm provided by the invention has the advantage that the position of the target palm print image can be found by only 1 / 2 N times of operation, and the probability of finding the position of the target image in the palm print database by the algorithm is close to 1.
Owner:HENAN POLYTECHNIC UNIV
High-attenuation ultra-small common mode conduction electromagnetic interference active filter
ActiveCN1866703ASimple structureSimple designFrequency selective two-port networksPower conversion systemsCapacitanceAlternating current
The invention discloses a high attenuation microminiaturte common mode transmission electromagnetic interference active filter, which includes ring high-frequency current-transformer, wherein three windings twine round the mutual-inductor; the coiling directions of three windings are the same; two windings connect the alternating current power lead-in end; another end connects the carry-in terminal of operational amplifier; the export of operational amplifier feedbacks signal to noise source device by two high-pressure capacitances and electric resistances. The filter has simple and reasonable structure, which has strong noise attenuation ability and good low-frequency filtering feature.
Owner:XI AN JIAOTONG UNIV
Artificial surface plasmon-based miniaturized low-pass filter
InactiveCN105703041ARealize the effect of low-pass filteringIncrease flexibilityWaveguide type devicesElectrical conductorLow-pass filter
The invention discloses an artificial surface plasmon-based miniaturized low-pass filter. The artificial surface plasmon-based miniaturized low-pass filter is characterized by mainly comprising a coplanar waveguide, wherein two ground strips of the coplanar waveguide are provided with groove unit arrays which are periodically distributed along the length direction of the coplanar waveguide; the two groove unit arrays are longitudinally symmetric about a center conductor strip; the depths of groove units are uniformly and progressively increased from two sides to the middle part in the length direction of the coplanar waveguide; and the depth of the groove unit in the middle part is fixed. On the basis of the coplanar waveguide, an artificial surface plasma structure is constructed by etching the periodic groove units on the ground strips by the coplanar waveguide to achieve the filtering function. T-shaped grooves are introduced; and equivalent depths of the grooves in the width direction are increased, so that the device miniaturization is achieved. The artificial surface plasmon-based miniaturized low-pass filter has a series of advantages of being simple in structure, compact in size, good in filter performance, easy to process, suitable for being matched with a traditional microwave transmission line and the device for use and the like.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Method and system for adaptive time-frequency peak filtering of power signals
The invention discloses an adaptive time-frequency peak filtering method and a system for a power signal. The filtering method comprises the following steps of: obtaining a power signal sequence; determining a time window length of each signal in the power signal sequence according to the power signal sequence; performing point-by-point processing on the power signal sequence to construct an analytic sequence; determining a pseudo Wigner-Ville of the parsed sequence at different lengths of the time window; according to the pseudo Wigner-Ville distribution, determining the power signal recoverysequence; determining a distribution range of a pure power signal according to the power signal recovery sequence; the pure power signal being a noise-free power signal; determining an optimal time window length according to the distribution range; The power signal sequence is filtered according to the optimal time window length, and the filtered power signal sequence is determined. The filteringmethod and the system provided by the invention can enhance the filtering effect of the non-stationary non-Gaussian noise in the power signal sequence.
Owner:GUANGDONG UNIV OF PETROCHEMICAL TECH
Magnetic levitation train suspension system position sensor signal processing method and device
ActiveCN108657014ASafe and stable suspensionImprove filtering abilityElectric propulsionDifferentiatorSystems design
The invention discloses a magnetic levitation train suspension system position sensor signal processing method and device. The method includes the following steps that S100, real-time signals of a suspension system position sensor are obtained as to-be-processed signals; S200, a discrete time optimal controller is designed according to a discrete second-order series system, and a tracking differentiator corresponding to the optimal controller is constructed; S300, a suspension height signal and a speed signal required by a magnetic levitation train suspension system are obtained through the tracking differentiator according to the real-time signals of the position sensor; and S400, the obtained suspension height signal and the obtained speed signal are fed back to the optimal controller, and the system reaches the expected system state. The signals of the suspension system position sensor can be processed in real time, the filter capacity for noise of the signals is high, and thereforesafe and stable suspension of a magnetic levitation train can be guaranteed.
Owner:NAT UNIV OF DEFENSE TECH
LCL filter with coupled inductors
InactiveCN103856176AReduce iron consumptionSolve the problem of poor filtering effect in high frequency bandMultiple-port networksPower conversion systemsCapacitanceEngineering
The invention discloses an LCL filter with coupled inductors and belongs to the field of design of power electronic devices. The input end of an alternating-current voltage side inductor of the filter is connected with an alternating-current voltage source, a counteracting inductor is connected with the output end of the alternating-current voltage side inductor in parallel after being connected with a filtering capacitor in series, a damping resistor can be connected with the filter capacitor in series or in parallel, or the damping resistor can be not adopted, the alternating-current voltage side filtering inductor and a rectification or inversion side filtering inductor are coupled and connected in series in the forward direction, and the output end of the rectification or inversion side filtering inductor is connected with a middle point of a rectification or inversion bridge arm. According to the LCL filter with the coupled inductors, not only can the size of the filter be reduced, but also the filtering effect can be improved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Coupling hole precision machining method
The invention belongs to the field of hole machining, and particularly relates to a coupling hole precision machining method. The method includes clamping a workpiece on a rotary workbench of a five-coordinate numerical-control drilling machine, machining a first hole of coupling holes in a numerical-control manner, detecting the actual internal contour of the first hole in a layered manner through a contact probe, calculating the actual axis of the first hole by the least square method, reversely calculating the drilling point coordinate of a second hole according to the design parameter requirements of colliding points, regenerating the numerical-control machining program of the second hole, and machining the second hole automatically. According to the method, on the basis of an integral strategy of measurement and processing, contour measurement, data processing and hole machining of the coupling holes can be completed by clamping the workpiece once, the machining requirements for colliding precision of coupling holes with different diameters and inclined angles can be met, machining efficiency is high, precision consistence is high, 'zeroing' processing of machining errors is performed on the colliding points, and coupling hole precision machining is realized.
Owner:DALIAN UNIV OF TECH
Adaptive three-phase grid-connected converter phase-locked loop and phase-locking control method thereof
ActiveCN110165706AImprove filtering abilityImprove accuracyVoltage-current phase angleSingle network parallel feeding arrangementsVIT signalsPhase locking
The invention relates to the technical field of electrical engineering, and provides an adaptive three-phase grid-connected converter phase-locked loop and a phase-locking control method thereof. Thephase-locked loop of the invention comprises a coordinate transformation unit, a delay signal offset module, a second-order generalized integrator, and a PI regulator. A grid voltage signal is input into the coordinate transformation unit. The output component of the coordinate transformation unit is input into the delay signal offset module. The output component of the delay signal offset moduleis connected in series with the second-order generalized integrator. A q-axis voltage component obtained by acquiring the difference between the output component of the delay signal offset module andthe output component of the second-order generalized integrator is connected in series to the PI regulator. The sum of the frequency difference output by the PI regulator and the rated angular frequency of the grid voltage is subjected to an integration link such that the phase angle of the grid voltage signal is obtained. The phase angle of the grid voltage signal is fed back to the coordinate transformation unit. The method can dynamically detect the grid voltage phase at high accuracy in the event of complex conditions, especially asymmetric grid faults and introduced harmonic components.
Owner:LIAONING TECHNICAL UNIVERSITY
Method and system for filtering non-stationary non-Gaussian noise from PLC communication signals
InactiveCN109150245AImprove filtration efficiencyOvercoming non-stationarityImproving S/N for transmission/receivingPower distribution line transmissionDecompositionVIT signals
The invention discloses a method and system for filtering non-stationary non-Gaussian noise from PLC communication signals. The filtering method comprises that an actually measured PLC signal sequenceand the multi-dimension decomposition layer number in a PLC communication system are obtained; each layer of filtered PLC communication signal sequence is determined according to the multi-dimensiondecomposition layer number and a multilayer low pass filter cutoff frequency; the length of a time window of the present layer is determined according to the filtered PLC communication signal sequencein the present layer; an analysis sequence is constructed; pseudo Wigner-Ville distribution of the analysis sequence in the length of the time window of the present layer is determined; each layer ofthe filtered PLC communication signal sequence is recovered according to pseudo Wigner-Ville distribution, and a recovered PLC communication signal sequence is determined; and from the last of the multi-dimension decomposition layer number, non-stationary non-Gaussian noise is filtered from the PLC communication system according to the recovered PLC communication signal sequence of the present layer and the interpolated PLC communication signal sequence of the last layer. Thus, the non-stationary non-Gaussian noise can be filtered from the PLC communication system effectively.
Owner:GUANGDONG UNIV OF PETROCHEMICAL TECH
Denitration and demercuration catalyst
ActiveCN106362732AHigh activityImprove anti-poisoning performanceGas treatmentHeterogenous catalyst chemical elementsEngineeringActive components
The invention relates to a denitration and demercuration catalyst and belongs to the field of environment-friendly catalysts. Components of the catalyst form a Mo-V-W / TiO2-Al2O3 system, the functions of denitration and demercuration are achieved at the same time under the effect of the active components Mo, V and W and the carrier TiO2-Al2O3, the structure of tail gas filtering and exhausting equipment can be effectively simplified, and environmental protection cost is reduced. In addition, the catalyst has high dust interference resisting capacity, and still can exert maximum filtering performance on the basis that no frequent halt is needed for removal of accumulated dust, and the catalyst is uniform in aging speed, high in filtering-out capacity and long in service life.
Owner:山东海润环保科技有限公司
Hybrid active filtering device suitable for LCC-HVDC system
PendingCN112583014ASolve the problem of decreasing filtering effectImprove filtering performanceElectric power transfer ac networkHarmonic reduction arrangementHarmonic controlControl engineering
The invention relates to a hybrid active filtering device suitable for an LCC-HVDC system, and belongs to a novel harmonic treatment method in high-voltage direct-current engineering. According to thehybrid active filter device, a 12 / 24-time single-tuned parallel passive filter is connected in series with a topological structure of a cascaded H-bridge-based active filter, a passive part bears most of high voltage, and the structure can effectively reduce the size and capacity of the active filter. According to the hybrid active filtering device, the ip-iq method based on the instantaneous reactive power theory is adopted to detect the load harmonic current, and the quasi-proportional resonance controller is adopted to track the harmonic current, so that the active filter can dynamically output compensation current which is equal to the load harmonic current in large reverse direction, power grid harmonic waves can be effectively filtered out, and harmonic control is realized.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Frequency converter structure with built-in EMI circuit
ActiveCN106712458AImprove filtering abilityLarge inductance valueCooling/ventilation/heating modificationsPower conversion systemsFrequency changerGround contact
The embodiment of the invention relates to a frequency converter structure with a built-in EMI circuit. The frequency converter structure comprises a box body, a fan, a power supply circuit board, and an EMI circuit board. The box body has a top plate and a bottom plate opposite to the top plate. A partition plate is arranged between the top plate and the bottom plate. The box body is divided into an upper chamber and a lower chamber by the partition plate. The bottom plate is made of a conductive material. The partition plate is connected to a heat radiation fin group arranged in the lower chamber. The fan is configured and is corresponding to the lower chamber. The power supply circuit board is fixedly connected to the partition plate and is arranged in the upper chamber. The EMI circuit board is attached to the bottom plate and is arranged in the lower chamber. The power supply circuit board is electrically connected to the EMI circuit board. Therefore, the heat radiation efficiency of the frequency converter structure is improved, a ground contact area is increased, and the common mode suppression ability of middle and high frequency bands is effectively improved.
Owner:DELTA ELECTRONICS INC
Discontinuous fringe filtering method based on shear wave transform and machine learning
ActiveCN108986112AAccurate segmentationStrong filtering abilityImage enhancementImage analysisComputer visionSplit lines
The invention belongs to the technical field of optical detection and optical information processing, and is used for realizing filtering of discontinuous stripes, achieving a stronger denoising ability and a better filtering result. The technical scheme adopted by the invention is that a discontinuous fringe filtering method based on shear wave transform and machine learning includes: according to the direction and density of a discontinuous fringe pattern, the discontinuous fringe pattern is divided into several sub-images which are divided by discontinuous dividing lines by using a fuzzy C-means clustering algorithm, then the sub-images are filtered by shear wave transform, and the filtered results are added together to realize the filtering of the discontinuous fringe pattern. The invention is mainly applied to optical detection and optical information processing.
Owner:TIANJIN UNIV
A method of computer video synthesis
InactiveCN111417015AShorten the timeImprove experienceImage enhancementImage analysisTime domainComputer graphics (images)
The invention discloses a method of computer video synthesis. The method comprises: receiving a video synthesis request of a user. The method is characterized in that the video synthesis request comprises a video material, an audio material and a material demand determined according to the video synthesis request. The method comprises the following steps: (1) determining a video, then generatingtime domain distribution information for video synthesis according to a determination result, synthesizing each media material through intelligent combination software, and after synthesis, performingnoise reduction on the synthesized video, wherein the noise reduction comprises the following steps: step (1) extracting three continuous frames of images of an input video: a previous frame, a current frame and a next frame. According to the method disclosed in the embodiment of the invention, in the process of synthesizing the video, the picture and the audio, corresponding special effects canbe added at the same time, the time required for video synthesis is shortened, the user experience is improved, the noise component can be better removed, the blocking effect is reduced, the details of the high-frequency part can be reserved, and the subjective visual perception is improved.
Owner:YONGCHENG VOCATIONAL COLLEGE
High-attenuation ultra-small common mode conduction electromagnetic interference active filter
ActiveCN100403633CSimple structureSimple designFrequency selective two-port networksPower conversion systemsCapacitanceEngineering
The invention discloses a high attenuation microminiaturte common mode transmission electromagnetic interference active filter, which includes ring high-frequency current-transformer, wherein three windings twine round the mutual-inductor; the coiling directions of three windings are the same; two windings connect the alternating current power lead-in end; another end connects the carry-in terminal of operational amplifier; the export of operational amplifier feedbacks signal to noise source device by two high-pressure capacitances and electric resistances. The filter has simple and reasonable structure, which has strong noise attenuation ability and good low-frequency filtering feature.
Owner:XI AN JIAOTONG UNIV
Nondestructive testing method for open joint of track plate
PendingCN111077222AIdentify gapIdentify seam damageAnalysing solids using sonic/ultrasonic/infrasonic wavesFrequency spectrumTrackway
The invention discloses a nondestructive testing method for an open joint of a track plate, which comprises the following steps: presetting a track plate with an open joint under the same working condition of an engineering field as a standard sample, arranging a plurality of measuring points at the position of the open joint of the track plate, and receiving impact elastic wave signals generatedat the open joint; extracting the impact elastic wave signals by utilizing spectrum analysis, and taking a frequency spectrum characteristic value according to the frequency spectrum value of the impact elastic waves of each measuring point; arranging a plurality of measuring points on a track plate to be measured, carrying out coordinate positioning on the measuring points, and receiving impact elastic wave signals generated by point-by-point knocking; and calculating a frequency spectrum value of a signal tested by the track plate, comparing and analyzing the frequency spectrum value with the frequency spectrum characteristic value, and carrying out plane imaging on all the measuring points to obtain a distribution state plane graph of the open joint area of the whole track. The open joint and open joint damage of the adjusting layer of a ballastless track can be efficiently and quickly identified.
Owner:四川陆通检测科技有限公司
Atomic current sensor
ActiveCN103048520ASimple structureLow costCurrent/voltage measurementSignal processing circuitsCurrent sensor
The invention discloses an atomic current sensor, which belongs to the field of electronics. The atomic current sensor comprises a light source control circuit, a light source, an atom absorption foam assembly and a sensor signal processing circuit, wherein the light source is controlled by using the light source control circuit; the atom absorption foam assembly is used for receiving an optical signal transmitted by the light source; and the sensor signal processing circuit interacts with the atom absorption foam assembly. Through the setting, the defect that an electromagnetic sensor applied in the fields of engineering detection of high-accuracy current detection, current metering detection and the like cannot well met requirements is overcome; and the atomic current sensor is simple in structure, has high measuring accuracy, and is suitable for popularizing and using.
Owner:CHENGDUSCEON ELECTRONICS
Filter
ActiveCN108736115AReduce volumeImprove filtering abilityWaveguide type devicesElectrical conductorCoupling
Disclosed is a filter which is arranged on a substrate; the filter comprises a first part, a second part, a first coupling part and a second coupling part, wherein first part is used for feeding a signal; the second part is used for outputting a signal; the first part is not electrically connected with the second part through a conductor; a surrounding space is defined by the first part and the second part; the first coupling part is arranged in the surrounding space; the first coupling part is not electrically connected with the first part and the second part through a conductor, and is usedfor coupling a feed-in signal; and the second coupling part is arranged in the surrounding space, and the second coupling part is not electrically connected with the first part, the second part and the first coupling part through a conductor, and is used for coupling a feed-in signal. The filter provided by the invention is very small in size, and shows strong filtering efficiency in a limited space; and by virtue of the filter, noise interference in a frequency band is lowered, and design of thin and short products is facilitated.
Owner:NANNING FUGUI PRECISION IND CO LTD
A Method for Precise Machining of Dual Small Holes
The invention belongs to the field of hole machining, and particularly relates to a coupling hole precision machining method. The method includes clamping a workpiece on a rotary workbench of a five-coordinate numerical-control drilling machine, machining a first hole of coupling holes in a numerical-control manner, detecting the actual internal contour of the first hole in a layered manner through a contact probe, calculating the actual axis of the first hole by the least square method, reversely calculating the drilling point coordinate of a second hole according to the design parameter requirements of colliding points, regenerating the numerical-control machining program of the second hole, and machining the second hole automatically. According to the method, on the basis of an integral strategy of measurement and processing, contour measurement, data processing and hole machining of the coupling holes can be completed by clamping the workpiece once, the machining requirements for colliding precision of coupling holes with different diameters and inclined angles can be met, machining efficiency is high, precision consistence is high, 'zeroing' processing of machining errors is performed on the colliding points, and coupling hole precision machining is realized.
Owner:DALIAN UNIV OF TECH
Miniaturized low-pass filter based on artificial surface plasmons
InactiveCN105703041BRealize the effect of low-pass filteringIncrease flexibilityWaveguide type devicesElectrical conductorBand-pass filter
The invention discloses an artificial surface plasmon-based miniaturized low-pass filter. The artificial surface plasmon-based miniaturized low-pass filter is characterized by mainly comprising a coplanar waveguide, wherein two ground strips of the coplanar waveguide are provided with groove unit arrays which are periodically distributed along the length direction of the coplanar waveguide; the two groove unit arrays are longitudinally symmetric about a center conductor strip; the depths of groove units are uniformly and progressively increased from two sides to the middle part in the length direction of the coplanar waveguide; and the depth of the groove unit in the middle part is fixed. On the basis of the coplanar waveguide, an artificial surface plasma structure is constructed by etching the periodic groove units on the ground strips by the coplanar waveguide to achieve the filtering function. T-shaped grooves are introduced; and equivalent depths of the grooves in the width direction are increased, so that the device miniaturization is achieved. The artificial surface plasmon-based miniaturized low-pass filter has a series of advantages of being simple in structure, compact in size, good in filter performance, easy to process, suitable for being matched with a traditional microwave transmission line and the device for use and the like.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Atomic Current Sensor
ActiveCN103048520BSimple structureLow costCurrent/voltage measurementSignal processing circuitsCurrent sensor
The invention discloses an atomic current sensor, which belongs to the field of electronics. The atomic current sensor comprises a light source control circuit, a light source, an atom absorption foam assembly and a sensor signal processing circuit, wherein the light source is controlled by using the light source control circuit; the atom absorption foam assembly is used for receiving an optical signal transmitted by the light source; and the sensor signal processing circuit interacts with the atom absorption foam assembly. Through the setting, the defect that an electromagnetic sensor applied in the fields of engineering detection of high-accuracy current detection, current metering detection and the like cannot well met requirements is overcome; and the atomic current sensor is simple in structure, has high measuring accuracy, and is suitable for popularizing and using.
Owner:CHENGDUSCEON ELECTRONICS
A second-order active filter circuit
InactiveCN103457572BImprove filtering abilitySimple structureOne-port active networksCapacitanceEngineering
The invention discloses a second-order active filter circuit, which includes operational amplifiers, variable capacitors, capacitors, resistors and diodes. The invention uses band-stop filtering to suppress or attenuate signals in a certain frequency band, allowing All signals pass through, with strong anti-interference characteristics, simple circuit structure, good stability, and strong filtering ability.
Owner:昆山龙仕达电子材料有限公司
Monocular vision deviation detection method and monocular vision deviation detection device for AGV
ActiveCN110378970AAdaptableStrong resistanceImage enhancementImage analysisRelational modelMorphological filtering
The invention provides a monocular vision deviation detection method and device for an AGV, and the method comprises the steps: carrying out the gray processing and sampling of collected image data, calculating a dynamic segmentation threshold through sample image data, carrying out the threshold segmentation of gray data, and obtaining a binary image; screening the binary images, carrying out morphological filtering on objects which may be foreground noise, and carrying out threshold segmentation on filtered pixel points again; segmenting the acquired image by using grids, traversing all gridunits, and forming a set by the grid units containing foreground colors; clustering the elements in the set, and separating positioning blocks; solving a central point coordinate of the positioning block by adopting an average value method; and establishing a space conversion relation model between an image coordinate system and a pixel coordinate system according to the center point coordinatesof the positioning block, and resolving the deviation. According to the invention, the anti-interference capability of the AGV can be improved while the use precision is satisfied.
Owner:WUHAN UNIV OF TECH
Filter and quantum chip measurement and control system
ActiveCN113054332AFiltering frequency band widthImprove filtering effectWaveguide type devicesHarmonic reduction arrangementElectrical conductorElectromagnetic absorbers
The embodiment of the invention provides a filter and a quantum chip measurement and control system. The filter comprises a conductor and a grounding body. A medium filling part is arranged between the conductor and the grounding body; the medium filling part is at least filled with an electromagnetic wave-absorbing material; and the electromagnetic wave-absorbing material at least comprises carbonyl iron powder and a low-temperature polymer. The quantum chip measurement and control system comprises a quantum chip, a measurement and control channel, a filter and a measurement and control instrument. One end of the measurement and control channel is connected with the quantum chip, and the other end is connected with the measurement and control instrument; and the filter is arranged on the measurement and control channel. The filtering effect of the filter can be improved, the volume occupied by the electromagnetic wave-absorbing material can be reduced while the filtering effect is improved, the volume of the filter can be further reduced, and the filter can be suitable for a quantum chip measurement and control system highly sensitive to a magnetic field.
Owner:ALIBABA GRP HLDG LTD
Communication interference defense circuit
PendingCN113890525AImprove filtering abilityImplement duplex deliveryVoltage/current interference eliminationElectric digital data processingTelecommunicationsInterference resistance
The invention provides a communication interference defense circuit. The communication interference defense circuit comprises two groups of circuits with the same structure, wherein the first group of circuits comprises a first differential amplification circuit, a first delay amplification circuit, a first comparison circuit and a first interlocking circuit which are sequentially connected from an input end to an output end; and the second group of circuits comprises a second differential amplification circuit, a second delay amplification circuit, a second comparison circuit and a second interlocking circuit which are sequentially connected from the input end to the output end. The input end of the first differential amplification circuit is connected with a first communication port, the output end of the first differential amplification circuit is connected to the first input end of the first interlocking circuit after sequentially passing through the first delay amplification circuit and the first comparison circuit, and the second input end of the first interlocking circuit is connected with the second output end of the second interlocking circuit; the first output end of the first interlocking circuit is connected with the second communication port, and the second output end of the first interlocking circuit is connected to the second input end of the second interlocking circuit. The communication anti-interference problem in the duplex communication signal transmission process can be solved.
Owner:北京英瑞来科技有限公司
filter
ActiveCN108736115BReduce volumeImprove filtering abilityWaveguide type devicesElectrical conductorEngineering
Disclosed is a filter which is arranged on a substrate; the filter comprises a first part, a second part, a first coupling part and a second coupling part, wherein first part is used for feeding a signal; the second part is used for outputting a signal; the first part is not electrically connected with the second part through a conductor; a surrounding space is defined by the first part and the second part; the first coupling part is arranged in the surrounding space; the first coupling part is not electrically connected with the first part and the second part through a conductor, and is usedfor coupling a feed-in signal; and the second coupling part is arranged in the surrounding space, and the second coupling part is not electrically connected with the first part, the second part and the first coupling part through a conductor, and is used for coupling a feed-in signal. The filter provided by the invention is very small in size, and shows strong filtering efficiency in a limited space; and by virtue of the filter, noise interference in a frequency band is lowered, and design of thin and short products is facilitated.
Owner:NANNING FUGUI PRECISION IND CO LTD
filter
InactiveCN108736111BReduce volumeImprove filtering abilityWaveguide type devicesSoftware engineeringNoise
A filter is arranged on a substrate and comprises a first part, a second part, a grounding part, a first coupling part and a second coupling part. The first part is arranged on the first layer of thesubstrate and used for feeding in a signal; the second part is arranged on the first layer and used for outputting the signal; the grounding part is arranged on the second layer of the substrate; thefirst coupling part is arranged on the first layer, electrically connected with the first part and the second part and connected with the grounding part through a through hole; and the second couplingpart is arranged on the first layer, electrically connected with the first part and the second part and connected with the grounding part through a through hole. According to the filter, the size isvery small, the powerful filtering efficiency is shown in a limited space, and not only is noise interference in the frequency band reduced, but also the light, thin, short and small product design can be achieved.
Owner:AMBIT MICROSYSTEMS (SHANGHAI) LTD +1
lcl filter with coupled inductor
InactiveCN103856176BReduce iron consumptionSolve the problem of poor filtering effect in high frequency bandMultiple-port networksPower conversion systemsCapacitanceEngineering
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com