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34results about How to "Overcoming interference" patented technology
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Nuclear magnetic resonance and transient electromagnetic combined instrument and method
InactiveCN1936621AImprove signal-to-noise ratioOvercoming the small emission currentElectric/magnetic detection for well-loggingMeasurements using NMR imaging systemsSolid-state nuclear magnetic resonanceNMR - Nuclear magnetic resonance
The invention discloses a geophysical exploration device and the method which combines the nuclear magnetic resonance and the transient electromagnetism. First to select the coupled device in the transient electromagnetism mode, and it lays the emission loop and the receiving loop to detect every measuring point in the detecting section and treat the transient electromagnetism data to find the low electrical resistivity point; then it changes to the nuclear magnetic resonance mode and lays the emission loop using the demarcated abnormal detecting point as the center, so it compares the detected data or the figure with the resistivity detected by the transient electromagnetism to judge the true or false of the detected resistivity. The invention can decrease the device cost and improve the detecting efficient and the precision.
Owner:JILIN UNIV
Rail vehicle positioning and speed detecting system based on phi-OTDR
ActiveCN103926588AUndisturbedSolve the speed measurement problemDevices using time traversedElectromagnetic wave reradiationRayleigh scatteringRayleigh Light Scattering
The invention discloses a rail vehicle positioning and speed detecting system based on a phi-OTDR. The rail vehicle positioning and speed detecting system based on the phi-OTDR comprises a phi-OTDR system main engine and an optical cable. The phi-OTDR system main engine is connected with the optical cable and is used for sending a pulsed optical signal, injecting the pulsed light signal into the optical cable, handling the Rayleigh scattering coherent light reflected back from the optical cable, and acquiring real time position information and speed information of train operation. The rail vehicle positioning and speed detecting system based on the phi-OTDR has the advantages that 1, the phi-OTDR is passive in the whole process, and free of influences of the electromagnetic field, and guarantees normal work in harsh environments such as thunder and lightning and the like; 2, due to the fact that the phi-OTDR is fully distributed, the monitoring distance can reach more than 100 km, the spatial resolution can reach the meter level, so that a train command and dispatching center can directly acquire the real time position information and speed information of a train through the phi-OTDR system main engine.
Owner:饶云江
Voice encryption and decryption method
InactiveCN102624518AOvercome the cycleOvercoming interferenceSpeech analysisSecurity arrangementComputer hardwareTime domain
The invention discloses a voice encryption method, which includes the following steps that digital voice signals are varied from a time domain to a frequency domain according to set length in sectional mode, varied voice signals are encrypted according to a secret key, performing conversion from a transformation domain to the time domain on encrypted voice signals, and encrypted time domain signals are obtained. The voice encryption method can guarantee safety of a mobile communication system and can confront effects of encoding problems in 2G and 3G standard on the secret key well. The invention further discloses a voice decryption method.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for implementing fast measurement of inductive winding DC resistance by using constant voltage source
InactiveCN101477150AQuick measurementQuick testResistance/reactance/impedenceElectrical resistance and conductanceAnti jamming
The invention discloses a method for realizing the rapid measurement of direct current resistance of an inductive winding by utilizing a constant voltage source. The rapid measurement is realized by utilizing the constant voltage source in a rapid measurement instrument of the direct current resistance of the inductive winding to maintain a constant working voltage, selecting the range according to the resistance range to be tested of a winding of inductive equipment and adjusting the current of a measurement circuit by changing a resistance value of a range circuit; and a circuit of the rapid measurement instrument comprises a power supply device, the range circuit, a millivoltmeter and a control circuit of the constant voltage source. The method can realize the rapid measurement of the direct current resistance of windings of inductive equipment such as transformers, generators, engines, electric reactors and so on, and is suitable for field debugging at construction stages of metallurgical enterprises. The rapid measurement instrument, which has the characteristics of light weight, convenient carrying, simple operation, safety and applicability, of the direct current resistance of windings of inductive loading equipment can be produced according to the method; and the rapid measurement instrument can substitute a double electric bridge and constant current source method to measure the direct current resistance of the inductive windings, and has the advantages of quick measurement speed, strong anti-jamming ability, steady and intuitive readings, and high accuracy.
Owner:CHINA FIRST METALLURGICAL GROUP
Road illumination control system based on dual-mode communication
InactiveCN104994662AOvercoming interferenceLow costElectric light circuit arrangementCarrier signalEngineering
The invention belongs to the road illumination technical field and provides a road illumination control system based on dual-mode communication. The system comprises a monitoring center, a plurality of centralized controllers, a plurality of single-lamp controllers and a plurality of street lamps. The monitoring center is connected with the centralized controllers through network cables or GPRS. Each centralized controller is connected with a plurality of single-lamp controllers through power lines or in a micropower wireless way. The single-lamp controllers are connected with the street lamps in a one-to-one correspondence way. The centralized controllers are used for receiving street lamp state control commands sent from the monitoring center and further sending the street lamp state control commands to the single-lamp controllers. The single-lamp controllers control the working states of corresponding street lamps according to the commands. Each centralized controller performs communication in a way to switch to one of the two modes including power line carrier wave communication and micropower wireless communication according to communication environments. The road illumination control system solves the problems of severe on-site communication interference and low communication success rate.
Owner:深圳市瑞恩联技术有限公司
Radar-based non-contact human body breathing detection method and Radar-based non-contact human body breathing detection device
PendingCN110192862AImprove reliabilityEasy to operateRespiratory organ evaluationSensorsHuman bodyRespiratory signal
The invention discloses a radar-based non-contact human body breathing detection method and a radar-based non-contact human body breathing detection device. An intelligent algorithm is used to discriminate the motion posture of a vital sign target in a detection area, and when a human body target is determined in a quiet state, the respiratory detection is started, and a respiratory value is output. In the event of respiratory abnormality, an alarm message is sent to notify the family member or the nursing staff in time, so that the people can be promptly treated, the reliability of the respiratory detection is remarkably improved, and the technical problem that the current non-contact detection breathing method cannot determine and detect the target state of the human body can be solved;by performing a wavelet analysis algorithm, time-domain peak finding and downsampling processing on the sampled echo signals, a respiratory signal can be accurately identified and the respiratory frequency can be obtained, and the method has the advantages of high accuracy and strong real-time performance.
Owner:长沙军民先进技术研究有限公司
Device for remotely controlling intelligent television through intelligent hand-held terminal and control method thereof
ActiveCN104469455AEasy remote controlExtended signal receiving methodSelective content distributionKey pressingComputer module
The invention relates to a device for remotely controlling an intelligent television through an intelligent hand-held terminal and a control method of the device. The device comprises a recognition control module and the intelligent hand-held terminal. The recognition control module comprises a first wireless communication module, a decoding module, a first micro-control processing module and an encoding module. The intelligent hand-held terminal comprises a WIFI module, a second wireless communication module, a camera module, an image encoding module, a second micro-control processing module, a touch screen, a buzzer, a voice encoding module and a voice recognition module. The control method comprises the steps that a user selects channel switching or sound regulation through a touch key or a voice recognizer of the intelligent hand-held terminal, corresponding operation instructions are transmitted to the recognition control module, and channel switching or sound regulation is achieved through a central control processor of the intelligent television. According to the device for remotely controlling the intelligent television through the intelligent hand-held terminal and the control method of the device, operation by the user on the intelligent television is greatly facilitated, and user experience is improved.
Owner:TPV ELECTRONICS (FUJIAN) CO LTD
Gauge detection ranging method and system based on camera and controllable stroboscopic light source
ActiveCN106970024AOvercome environmental problemsOvercoming interferenceTelevision system detailsMaterial analysis by optical meansVisual field lossCMOS
The invention discloses a gauge detection ranging method and system based on camera and controllable stroboscopic light source; when a train runs, frame frequency of a CMOS (complementary metal oxide semiconductor) camera and flashing frequency of a stroboscopic light source are adjusted so that the stroboscopic light source strobes many times within one frame of the exposure period of the CMOS camera, and a detection subject smaller than one-third of a visual field of the CMOS camera is periodically imaged within the same frame of the CMOS camera; the periodic image is subjected to Fourier transform, amplitude at specific frequency in an amplitude spectrum curve is maximum, a frequency corresponding to the maximum value is the number of pixels between repeated images of the detection subject within the strobing period, and a distance between the repeated images is acquired by multiplying the number of pixels between the repeated images of the detection subject within the stroking period by a length of each pixel of the camera; a distance to the detection subject is calculated according to the imaging principle of camera, and the method has high measuring precision and accuracy and is suitable for high-speed online detection of a railway.
Owner:CENT SOUTH UNIV
Orthopaedic robot guide needle positioner, navigation unit and positioning system
ActiveCN103815970ARealize positioning and guidance functionsHigh precisionDiagnosticsSurgeryBiomedical engineeringMarine navigation
The invention relates to an orthopaedic robot guide needle positioner, a navigation unit and a positioning system. The orthopaedic robot guide needle positioner comprises a curved guide positioning device. The curved guide positioning device comprises a connecting rod and a support which are mutually connected, a sliding sleeve capable of sliding along the axis of the connecting rod is arranged on the connecting rod, a sleeve fixing structure is arranged on the support, a guide sleeve used for guiding a guide needle is fixedly disposed through the sleeve fixing structure, and the axis of the guide sleeve forms an angle ranging from 15 to 75 degrees with the axis of the connecting rod after the guide sleeve is disposed. By the arrangement of the curved guide positioning device, the guide needle for cooperation can be greatly shortened and is enabled to be far away from a mechanical arm of an orthopaedic robot, interference of the C-shaped arm and the guide needle is removed, and requirements on operation can be well met.
Owner:BEIJING TINAVI MEDICAL TECH
Microwave infrared sensing control device and signal processing method thereof
ActiveCN101951709AImprove sensing sensitivityOvercoming sensitivityElectronic switchingElectric light circuit arrangementMicrocontrollerAudio power amplifier
The invention relates to a microwave infrared sensing control device and a signal processing method thereof. The microwave infrared sensing control device comprises a microwave sensor, a first infrared sensor, a second infrared sensor, a third infrared sensor, a signal amplifier and a main control module. The second infrared sensor is arranged at the position of the symmetric axis between the first infrared sensor and the third infrared sensor. The microwave sensor is arranged above or below the second infrared sensor and in the detection direction of the second infrared sensor. The main control module comprises a singlechip for processing signals and a relay, and the microwave sensor and the infrared sensors are connected to the main control module through respective signal amplifiers. Compared with the prior art, the microwave infrared sensing control device of the invention has the advantages that: the transverse and longitudinal sensitivity is improved; meanwhile, as the three infrared sensors are arranged, the range of an effective detection angle is improved and an obvious anti-interference effect is achieved.
Owner:GUANGZHOU PANYU AUROLITE ELECTRICAL
Intelligent system for indoor article location, management and analysis
ActiveCN107958040AOvercome precisionOvercoming interferenceMachine learningResourcesIntelligent managementComputer vision
The invention provides an intelligent system for indoor article location, management and analysis, and belongs to the technical field of indoor location. The intelligent system comprises an intelligent recognition module, an intelligent management module and a cloud machine learning module, wherein the intelligent recognition module comprises an indoor map modeling and recognition module, an article recognition module and an article location module; the intelligent management module comprises a display module and an indoor article database; and the cloud machine learning module comprises a maprecognition module and an article recognition module. Through combining and improving research achievements of newest computer vision and location technologies, a system which is high in precision, high in response speed, low in cost and high in stability and is used for indoor article recognition, location and management is built, millions and millions of families are liberated from daily fussyindoor article conclusion, tracking and finding, and users can find required articles at any time and manage and analyze all the articles, so that gaps in the field on the market are filled.
Owner:深圳慧智星晨科技有限公司
Personnel positioning method based on smart handheld device
ActiveCN107948955AOvercome precisionOvercome accuracyParticular environment based servicesPosition fixationData informationLongitude
The invention discloses a personnel positioning method based on a smart handheld device. The personnel positioning method comprises the steps that: a patrol inspection personnel to be positioned receives data information of a patrol inspection position by means of the smart handheld device and judges a signal type of the data information; when the data information is an RF signal, the smart handheld device acquires data information of an RF tag and transmits the data information to a central management and control platform, and the central management and control platform positions the patrol inspection personnel to be positioned; when the data information if a Bluetooth signal, the smart handheld device acquires data information of a Bluetooth tag with top-ranked signal energy and transmits the data information and a signal energy value to the central management and control platform, and the central management and control platform positions the patrol inspection personnel to be positioned; and when the smart handheld device cannot receive data information of RF signal or Bluetooth signal type, the smart handheld device acquires a GPS signal, and transmits latitude and longitude coordinate information contained in the GPS signal to the central management and control platform. The personnel positioning method based on the smart handheld device can be used for positioning the location of the personnel in a complex environment precisely.
Owner:石化盈科信息技术有限责任公司
Strapdown optical seeker decoupling method considering measurement delay
ActiveCN110906955AOvercoming interferenceReduce the impact of decouplingMeasurement devicesGyroscopeFlight vehicle
The invention discloses a strapdown optical seeker decoupling method considering measurement delay, and relates to the field of aircrafts. The objective of the invention is to solve the problem of large guidance information interference under the condition that strapdown optical seeker measurement information time delay is different from aircraft attitude sensor measurement information time delayat present. The method comprises: measuring the delay time of signal output of the strapdown optical seeker; measuring the output delay time of the angular rate gyroscope through an angular vibrationtest of the angular rate gyroscope; further obtaining the difference between the delay time of the output information of the strapdown optical seeker and the delay time of the output information of the angular rate gyroscope; discretizing the sampling period according to the angular rate gyroscope; determining the beat number adjusted by the attitude angle information resolved by the angular rategyroscope, and solving to obtain the sight angle of the connection line of the aircraft and the target for eliminating the measurement delay by utilizing the information output by the strapdown optical seeker and the attitude angle information resolved by the angular rate gyroscope and adjusted by the time beat number, so as to complete decoupling of the strapdown optical seeker.
Owner:HARBIN INST OF TECH
Surge protection method and circuit, IGBT (Insulated Gate Bipolar Translator) circuit and heater
ActiveCN105305784AImprove reliabilityImprove the heating effectElectronic switchingEmergency protective arrangements for limiting excess voltage/currentState of artInterference resistance
The invention discloses a surge protection method and circuit, an IGBT (Insulated Gate Bipolar Translator) circuit and a heater. The method comprises steps of timely detecting CE pole voltage at one side of a to-be-protected IGBT, and instantly performing surge protection of the IGBT when a surge occurs; and based on surge protection of the IGBT, timely detecting CE pole voltage at the other side of the IGBT, and performing surge protection of the IGBT again when surge energy is not fully released and / or the CE pole voltage at the other side of the IGBT does not drop to a preset safety state, and timely ending surge protection of the IGBT when surge energy is fully released and the CE pole voltage at the other side of the IGBT drops to the preset safety state. The scheme provided by the invention can overcome defects that the protection time is hard to control, the anti-interference capability is weak, the user experience is poor and the like in the prior art, and achieves the beneficial effects of easy-to-control protection time, strong anti-interference capability and good user experience.
Owner:GREE ELECTRIC APPLIANCES INC
Out-of-step oscillation center position positioning method based on minimum measured impedance
ActiveCN108802561AImprove adaptabilityDeeply revealing the characteristics of out-of-step oscillationFault location by conductor typesObservation pointPower grid
The invention discloses an out-of-step oscillation center position positioning method based on a minimum measured impedance. The method comprises the following steps: according to the grid structure of a power grid, arranging observation points on two sides of a link connection line of the power grid and a plurality of stages of subordinate lines; calculating a minimum measured impedance of each observation point in an out-of-step oscillation period; determining the line where an out-of-step oscillation center is located according to the minimum measured impedance of each observation point inthe out-of-step oscillation period; positioning the position of the out-of-step oscillation center according to the line where the out-of-step oscillation center is located. The out-of-step oscillation center position positioning method based on a minimum measured impedance can accurately locate the position of the out-of-step oscillation center according to the minimum measured impedance values and directions of different observation points, and the minimum measured impedance is used as judging basis, thereby improving adaptability for changes of operation modes of the power grid. The methodhas anti-interference performance on tide large fluctuation in an out-of-step oscillation process and out-of-order operation of control equipment, and the method has good application prospect.
Owner:NR ELECTRIC CO LTD +1
Magnetorheological elastic composite film surface stress biosensor
PendingCN114777964ASimple structureOvercoming identificationForce measurement by measuring magnetic property varationFluid pressure measurement by electric/magnetic elementsComposite filmInterference resistance
The invention belongs to the technical field of biosensors, and relates to a magneto-rheological elastic composite film surface stress biosensor. The problems of low biological detection sensitivity and poorer anti-interference capability under low concentration are solved; comprising a magnetorheological elastic composite film layer, the periphery of the magneto-rheological elastic composite film layer is provided with a deformation space; the magneto-rheological elastic composite film layer comprises a biological recognition layer, a piezoelectric / piezoresistive layer and a magneto-rheological elastic layer which are sequentially arranged in an overlapped mode. The surface of the biological recognition layer is modified with a probe; the magneto-rheological elastic layer and the biological recognition layer are respectively connected with an electrode; the electrode is in contact with the piezoelectric / piezoresistive layer; the magneto-rheological elastic layer deforms under the action of a magnetic field so as to amplify the surface stress of the biological recognition layer; the device has the characteristics of miniaturization, interference resistance, high precision and capability of simultaneously acquiring a plurality of sensing information amounts.
Owner:TAIYUAN UNIV OF TECH
Conductor temperature measuring method and device for detachable cable connector
InactiveCN109781303AOvercome efficiencyOvercoming interferenceThermometer detailsTransmission systemsHigher PowerElectric energy
Owner:江明鸿
Beacon structure, pavement, sensing device, mobile machine, system and method
The invention discloses a beacon structure, a pavement, a sensing device, a mobile machine, a system and a method. The method determines the current position of the mobile machine by reading a beaconstructure set on the pavement, based on the color code information of the beacon structure and the position information corresponding to the color code. The beacon structure set on the pavement is read by the mobile machine, and the current position of the mobile machine is determined according to the color code information of the beacon structure and the position information corresponding to thecolor code, thereby solving the technical problems of high cost, poor stability and strong anti-interference ability of mobile machine positioning in the prior art, and realizing a beacon structure, apavement, a sensing device, a mobile machine, a system and a method beneficial to realizing low-cost, high-precision and high-stability positioning.
Owner:深圳市波特立物联科技有限公司
Partial Discharge Spectrum Feature Pattern Recognition Algorithm Based on Gaussian Parameter Fitting
ActiveCN105223475BIncrease the difficultyImprove reliabilityTesting dielectric strengthPattern recognitionGaussian function
The invention discloses a characteristic pattern recognition algorithm for a partial discharge spectrum based on Gauss parameter fitting. The algorithm comprises a) the partial discharge spectrum in the partial discharge process to be measured is obtained; b) based on the obtained partial discharge spectrum, the distance between the to-be-identified characteristic quantity of partial discharge and the standard characteristic quantity of partial discharge in the partial discharge process to be measured is obtained via a Gaussian function; and c) based on the obtained distance, an identification result of the partial discharge mode is obtained and output. The characteristic pattern recognition algorithm can overcome the defects that in the prior art, the anti-interference capability is low, the identification difficulty is high and the reliability is low, and has the advantages of high anti-interference capability, low identification difficulty and high reliability.
Owner:STATE GRID CORP OF CHINA +2
Displacement amplification mechanism, optical fiber scanning device and projector
ActiveCN108803008BLarge displacementIncrease display resolutionOptical elementsMechanical engineeringProjector
The invention discloses a displacement amplifying mechanism which comprises a rigid rod body, of the two end parts are respectively a displacement input end and a displacement output end; a first spherical hinge part which is arranged on the rigid rod body, wherein the distance between the first spherical hinge part and the displacement output end is larger than the distance between the first spherical hinge part and the displacement input end; a supporting seat which is used for supporting the rigid rod body; and a second spherical hinge part arranged on the support; wherein the first spherical hinge part and the second spherical hinge part are connected in a matched mode to form a spherical hinge structure. The two-dimensional movement of the displacement input end of the rigid rod bodyenables the rigid rod body to rotate around the sphere center of the spherical hinge structure, so that the two-dimensional motion displacement of the displacement input end is amplified and then transmitted to the displacement output end of the rigid rod body, and a two-dimensional motion synchronous negative response is formed, so that a two-dimensional driving coaxial-response displacement amplifying mechanism is formed.
Owner:CHENGDU IDEALSEE TECH
Transverse crack feature identification and extraction method of stepped cylinder shaft elastic wave signals
ActiveCN110726538AOvercoming interferenceThe analysis result is accurateMachine part testingFeature extractionEngineering
The invention discloses a transverse crack feature identification and extraction method of stepped cylinder axis elastic wave signals. The existing analysis method of rotating shaft elastic wave signals is influenced by frequency doubling signals. According to the transverse crack feature identification and extraction method disclosed by the invention, after elastic wave signals collected at bothends of a tested stepped cylinder shaft are respectively filtered, the elastic wave signals are decomposed into multiple IMF components and residual signals by using an EMD, EEMD, or CEEMD method, then a frequency doubling component is subtracted from the decomposed signal, and then the center frequency of a transverse crack attenuation band and the relationship characteristics of bandwidth and time distribution are used as characteristic parameters of the crack to perform analysis and matching with a characteristic database to obtain position and depth information of the transverse crack. Inthe transverse crack feature identification and extraction method disclosed by the invention, the frequency doubling components in the elastic wave signals are decomposed and removed, the problem of large interference of the frequency doubling signals during the analysis of the energy of the wave components of the elastic waves is overcome, and then the final analysis result of the transverse crack is more accurate.
Owner:ZHEJIANG SCI-TECH UNIV
Method and device for controlling linear motor
PendingCN106936358AReduce development difficultyRealize automatic followAC motor controlElectric machineControl engineering
The invention provides a method and a device for controlling a linear motor. The method comprises the following steps: a control unit makes a first switching device and a second switching device in an inverter bridge circuit switched on to output a positive direct current to a linear motor; and the control unit makes a third switching device and a fourth switching device in the inverter bridge circuit switched on to output a negative direct current to the linear motor. The control unit applies positive and negative intermittent direct voltages alternately to the linear motor according to the switch-on / off sequence of the switching devices in the inverter bridge circuit so as to make a linear compressor reverse naturally and follow the resonant frequency automatically. Therefore, there is no need to use a complex algorithm to detect the resonant frequency. The difficulty of development of the control unit is greatly reduced.
Owner:ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
Follow-up device capable of driving semitrailer carriage to move longitudinally and semitrailer
PendingCN113212571AReduce wind resistance and fuel consumptionIncrease the gapTractor-trailer combinationsWindageSlider crank
The invention discloses a follow-up device capable of driving a semitrailer carriage to move longitudinally and a semitrailer applying the follow-up device. The follow-up device is located between a tractor and a semitrailer carriage and comprises a saddle, a slider-crank mechanism, a generating mechanism and a driving mechanism. When the semitrailer turns, as an included angle is formed between a tractor cab and the axis of the semitrailer carriage, the driving mechanism drives the crank sliding block mechanism to drive a multiplication planetary gear to longitudinally move backwards in a tooth groove formed by a fixed rack and a movable rack, the fixed rack drives the multiplication planetary gear to rotate, and therefore the multiplication planetary gear drives a saddle bottom plate to longitudinally move backwards; the follow-up backward movement adjustment of the semitrailer carriage is achieved, and the gap between the tractor cab and the semitrailer carriage of the semitrailer is enlarged; after turning is finished and the relative rotation returns to the straight running, the driving mechanism drives the generating mechanism to reset, the saddle longitudinally moves forwards, the gap between the tractor cab and the semitrailer carriage is reduced again, and the whole vehicle recovers to the wind resistance reducing state.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
High-resolution infrared imaging system and method based on compressed sensing
ActiveCN107560735BDispersion aliasing effect is goodOvercoming serious loss problemsRadiation pyrometrySpectral bandsEnergy information
A high-resolution infrared imaging system and method based on compressed sensing are provided. The system comprises a lens group disposed at the forefront of the system, and a spectral band division module, a compression sampling module, an observation module, a reconstitution module, and an image composition module which successively arranged according to the penetration order of an optical path.The operating waveband of the imaging system is extended to an infrared spectrum of 8-14 [mu]m and a better dispersion aliasing effect is achieved on a spectral image. The method, by dividing the spectrum segments of an infrared spectrum scene image and composing a reconstructed multispectral infrared image, overcomes serious information loss in the prior art during processing an original infrared image in a wide band so as to increase a data size, improve the spectral information utilization in a wide band, retain the energy information of the image, and improve the quality of a reconstruction result.
Owner:XIDIAN UNIV
Pitching angle swing mechanism of vehicle-mounted radar
PendingCN112298056ACompact structureAccurate stay positionWave based measurement systemsVehicle componentsIn vehicleRadar
The invention relates to a pitching angle adjusting mechanism of a vehicle-mounted radar. In the mechanism, a radar is fixedly connected to a radar support; a fulcrum A fixing hinge shaft is in running fit with the radar support; a direct-current motor of a driving part is connected with a lead screw through a transmission mechanism, and when the direct-current motor drives the lead screw to rotate, a sliding block can be driven by a nut to move up and down; a composite kinematic pair part comprises a moving pair part and a rotating pair part, and a second guide mechanism in the moving pair part can move up and down along with the sliding block; a linear bearing seat can transversely and horizontally move along the second guide mechanism; the linear bearing seat is connected with the radarsupport through the rotating pair part, and when the radar support rotates around the axis of the rotating pair part, the radar support can do pitching swing around the A fulcrum fixing hinge shaft.By adopting a composite motion mode of the moving pair part and the rotating pair part, the function that the radar does pitching swinging around the Z axis is achieved, the angle adjusting precisionis high, and it can be guaranteed that the radar can stay at an accurate position after the angle is adjusted.
Owner:CHANGCHUN TONGSHI PHOTOELECTRIC TECH CO LTD
Bayesian denoising method based on wavelet low frequency
The invention discloses a Bayesian denoising method based on wavelet low frequency. The method comprises the following steps of: 1, inputting a natural image to be denoised; 2, selecting pixel blocks to be estimated; 3, selecting a central low-frequency-coefficient block; 4, determining a searching window; 5, selecting a low-frequency-coefficient block; 6, judging whether a constraint condition is satisfied; 7, computing a similarity weight value; 8, judging whether all points in the searching window are searched; 9, computing the recovery values of the pixel blocks to be estimated; 10, judging whether the natural image to be denoised is searched completely; and 11, integrating the recovery values. The similarity weight value is computed by using a wavelet low frequency coefficient. Compared with the conventional denoising method, the Bayesian denoising method has the advantages that: the edge and texture details of the natural image can be well kept and recovered while noise is well smoothened; and the Bayesian denoising method can be applied to denoising processing of the natural image.
Owner:XIDIAN UNIV
Location method of out-of-step oscillation center based on minimum measured impedance
ActiveCN108802561BImprove adaptabilityDeeply revealing the characteristics of out-of-step oscillationFault location by conductor typesPower flowObservation point
Owner:NR ELECTRIC CO LTD +1
Recognition and Extraction Method of Transverse Crack Feature of Stepped Cylindrical Shaft Elastic Wave Signal
ActiveCN110726538BOvercoming interferenceThe analysis result is accurateMachine part testingFeature extractionEngineering
The invention discloses a method for identifying and extracting transverse crack features of a stepped cylindrical axis elastic wave signal. The existing method for analyzing the elastic wave signal of the rotating shaft is interfered by the frequency multiplier signal during the feature extraction. The present invention respectively filters the collected elastic wave signals at both ends of the stepped cylindrical shaft to be tested, decomposes them into a plurality of IMF components and residual signals by using EMD, EEMD or CEEMD methods, and then converts the multiplied frequency components from the decomposed The signal is subtracted, and then the center frequency of the stop band of the transverse crack and the relationship between the bandwidth and the time distribution are used as the characteristic parameters of the crack, which are analyzed and matched with the characteristic database to obtain the position and depth information of the transverse crack. The invention decomposes and removes the double frequency component in the elastic wave signal, overcomes the problem of large frequency double signal interference when analyzing the energy of the elastic wave component, and makes the final analysis result of the transverse crack more accurate.
Owner:ZHEJIANG SCI-TECH UNIV
Bayesian denoising method based on wavelet low frequency
The invention discloses a Bayesian denoising method based on wavelet low frequency. The method comprises the following steps of: 1, inputting a natural image to be denoised; 2, selecting pixel blocks to be estimated; 3, selecting a central low-frequency-coefficient block; 4, determining a searching window; 5, selecting a low-frequency-coefficient block; 6, judging whether a constraint condition is satisfied; 7, computing a similarity weight value; 8, judging whether all points in the searching window are searched; 9, computing the recovery values of the pixel blocks to be estimated; 10, judging whether the natural image to be denoised is searched completely; and 11, integrating the recovery values. The similarity weight value is computed by using a wavelet low frequency coefficient. Compared with the conventional denoising method, the Bayesian denoising method has the advantages that: the edge and texture details of the natural image can be well kept and recovered while noise is well smoothened; and the Bayesian denoising method can be applied to denoising processing of the natural image.
Owner:XIDIAN UNIV
Two-point detection method and device based on wire magnetic field
PendingCN111596120AOvercoming Installation ComplexityOvercome the installation costMagnetic measurementsCurrent measurements onlyComputational physicsCondensed matter physics
The invention provides a two-point detection method and device based on a wire magnetic field. The method comprises the steps of: obtaining magnetic induction intensity measurement data of magnetic sensing elements corresponding to a first measurement point and a second measurement point, wherein the straight line where the first measurement point and the second measurement point intersects or quasi-intersects with the center line of a wire, and the distance between the first measurement point and the second measurement point is known; and determining a wire current parameter by using the magnetic induction intensity measurement data, or judging whether the installation of the magnetic sensing element is loosened or not. Installation is convenient, an anti-interference capability is strong, and the device can be used for wire current detection and installation loosening detection.
Owner:ZHEJIANG WEISS WIRELESS NETWORK TECH CO LTD
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