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33results about How to "Eliminate glitches" patented technology
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Positioning method for sub-pixel at center of line laser in three-dimensional laser scanning system
The invention discloses a positioning method for a sub-pixel at center of line laser in a three-dimensional laser scanning system. The method comprises the steps of firstly acquiring original image information in laser scanning from a camera, performing preprocessing on an original image, eliminating noises in the image; performing threshold segmentation on the image after noise elimination, and performing crude extraction on the line laser; eliminating a burr phenomenon in the line laser after crude extraction, and further reducing width of the line width; obtaining a sub-pixel grade coordinate of the line laser center by means of an improved gravity center method, and correcting pseudo-object pixels in the sub-pixel grade coordinate by means of Hough transform. According to the positioning method, the improved gravity center method is combined with the Hough transform, a requirement for real-time and accurate acquisition of the sub-pixel coordinate of the line laser center by the three-dimensional laser scanning system can be satisfied, and accurate positioning for sub-pixel at the center of the line laser is realized.
Owner:JIANGSU UNIV OF SCI & TECH
Method and system for detecting deformation of transformer winding
InactiveCN105091732AEliminate glitchesAvoid interferenceElectrical/magnetic solid deformation measurementEngineeringFrequency response
The invention provides a method and a system for detecting the deformation of a transformer winding. The method comprises: acquiring response end voltage and exciting end voltage of the transformer winding to be detected under different frequency; calculating a transfer function module value of the transformer winding to be detected according to the response end voltage and the exciting end voltage; drawing a frequency response curve in a coordinate system according to the transfer function module value under different frequency, and drawing a frequency response curve in the coordinate system when the transformer winding is normal; pre-processing the two frequency response curves by using an erosion method to obtain curve data satisfying a preset condition, and calculating relevant coefficients of the two frequency response curves; and judging the deformation condition of the transformer winding to be detected according to the magnitude of the relevant coefficients and relevant coefficient preset values. According to the method, the two frequency response curves drawn in the coordinate system are pre-processed by using the erosion method, so that burrs are removed, interference of noise such as electromagnetic signals and the like is avoided, the accuracy of diagnosis is improved, and the probability of misjudgment is reduced.
Owner:STATE GRID CORP OF CHINA +2
Mechanical-hydraulic servo control device for multi-shaft automobile pure rolling steering
ActiveCN104742966AImprove securityQuick responseSteering linkagesFluid steeringNegative feedbackSteering wheel
The invention discloses a mechanical-hydraulic servo control device for multi-shaft automobile pure rolling steering. The mechanical-hydraulic servo control device is applied to the field of automobile steering. The mechanical-hydraulic servo control device mainly comprises a switch valve, a pressure reducing valve, a one-way valve, a transverse pull rod telescoping cylinder, a mechanical-hydraulic servo control valve, an angular displacement amplifying mechanism and the like. The mechanical-hydraulic servo control valve is used for carrying out servo control over the transverse pull rod telescoping cylinder, and it is effectively ensured that all steering wheels meet the Ackerman steering condition; by means of negative feedback control of the transverse pull rod telescoping cylinder and the mechanical-hydraulic servo control valve, high-precision dynamic pure rolling steering of an automobile is achieved; oil is supplemented to a feedback cavity automatically through the switch valve, the pressure reducing valve and the one-way valve, and generation of negative pressure is eliminated. Preferably, by means of a segmented multi-stage cam curve in the mechanical-hydraulic servo control device, the transverse pull rod telescoping cylinder can be locked mechanically and hydraulically, the risk in the high-speed traveling process is reduced while the pure rolling steering effect of the system is guaranteed, and the safety of high-speed traveling of the multi-shaft automobile is promoted.
Owner:FUZHOU UNIV
Method and device for extracting magneto-rheological polishing removal function
ActiveCN110245317AEfficient extractionImprove accuracyComplex mathematical operationsMagneto rheologicalComputer science
The invention discloses a method and device for extracting a magneto-rheological polishing removal function. The method comprises the following steps of acquiring the surface shape detection data of a substrate element before and after spot collection, wherein the edge of the substrate element is provided with a position mark; according to the surface shape detection data before and after speckle collection and the position mark of the substrate element, calculating to obtain the residual data; carrying out median filtering processing on the residual data; for the residual error data after filtering processing, adopting an elliptic arc to approach the contour of a removal function, and generating a plurality of removal functions containing the same parameters; and executing the data offset on the plurality of removal functions containing the same parameters, averaging, and extracting the removal functions. According to the method, the magneto-rheological polishing removal function can be accurately extracted, and the accuracy of the removal function and the magneto-rheological machining precision are improved.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
Seismic data mapping method and system
InactiveCN104297794AAvoid distortionAvoid deformationSeismic signal processingGraphicsComputer science
The invention discloses a seismic data mapping method and system. The method comprises the following steps: a normalization step; to be specific, carrying out normalization processing on obtained seismic data; a point coordinate calculation step; to be specific, calculating point coordinates of all seismic data based on the seismic data after normalization processing, data point intervals at horizontal and longitudinal directions of channels in a visual region, and positions of all data in the channels of the visual region; and an interpolation drawing step; to be specific, carrying out linear interpolation processing according to the point coordinates, obtained by calculation, of all seismic data, thereby completing seismic data drawing. According to the invention, graph distortion and deformation during traditional seismic data region filling drawing can be prevented; the burr phenomenon is eliminated; and objectives of seismic data mapping effect optimization and data processing quality improvement can be achieved.
Owner:CHINA PETROLEUM & CHEM CORP +1
Multi-phase clock switching device and method thereof
ActiveUS20120027144A1Improve accuracyImprove signal qualitySynchronising arrangementSwitching signalMulti phase
A multi-phase clock switching device includes a plurality of phase selection circuits. The phase selection circuit is used to receive a plurality of phase clock signals and determine how to output the phase clock signals to generate an output signal according to a switching signal. The phase selection circuit includes a selection unit and a protection unit. The selection unit receives at least a phase clock signal and determines how to output a phase clock signal according to the at least a phase clock signal and a selection signal. The protection unit determines how to generate the selection signal according to the phase clock signal and the switching signal.
Owner:REALTEK SEMICON CORP
PE (poly ethylene) protection film material for automobile and preparation method thereof
The invention relates to a PE protective film material for automobiles and a preparation method thereof. According to parts by mass, the components include: 100 parts of polyethylene PE, 10-30 parts of filler, and 1-5 parts of plasticizer. The preparation method includes: (1) weighing each raw material in proportion, melt extruding and granulating; (2) putting PE pellets into a twin-screw extruder, melting and mixing at 160-170°C, and stretching to form a film , and then apply the cross-linked acrylic resin adhesive to one side of the PE protective film, then pass the protective film through the air heating channel, and finally rewind and cut it. The invention significantly improves the tensile strength, reduces the toughness to a certain extent, further eliminates the phenomenon of burrs on the edge of the film caused by the uneven cutting surface, and effectively reduces the manufacturing cost of PE protective film products for automobiles, and has good application prospects.
Owner:宁波卓胜新材料有限公司
Continuous electrolytic polishing equipment
InactiveCN105951163AImprove smoothnessIncrease productivityElectrolysis componentsElectrolysisTorque motor
The invention belongs to the field of electrolysis equipment and particularly relates to continuous electrolytic polishing equipment. The continuous electrolytic polishing equipment comprises an electrolysis device, a neutralizing device, a washing device, a dehydrating device, a hydrogen-annealing device, a take-up device and a control instrument cabinet. The continuous electrolytic polishing process is finished at a time by the continuous electrolytic polishing equipment. The electrolysis device comprises two electrolytic baths which are vertically arranged; and a belt releasing device of the electrolysis device is a torque motor belt releasing device. The washing device comprises an ultrasonic device; and the take-up device comprises a meter counter. According to the continuous electrolytic polishing equipment disclosed by the invention, the production efficiency can be improved, four-stage electrolysis can be simultaneously finished, the surface smoothness of a product is improved, the strength and high-temperature resistance of the product are improved, the influence of impurities on the product is avoided, the phenomena of burrs and gaps of the product are also avoided, and the quality of the product is improved.
Owner:侯马市隆成电光源材料有限公司
Correction circuit for error detection and correction technology
ActiveCN107423153AEliminate glitchesReduce consumptionFault responseData resettingComputer moduleControl circuit
The invention provides a correction circuit for an error detection and correction technology. The correction circuit comprises a pulse widening circuit module and a time sequence control circuit module, wherein the pulse widening circuit module is connected with a first signal output by an error detection circuit module of the circuit; when the first signal indicates that the circuit generates a time sequence error, the pulse widening circuit module captures the first signal and carrying out conversion to output a high-pulse width second signal; the time sequence control circuit module inputs a first clock signal of the circuit and the second signal, and generates a second clock signal which closes the first clock signal for a clock period through logic operation; when the circuit is verified, the time sequence control circuit module generates a reset signal and transmits the reset signal to the pulse widening circuit module so as to reset the pulse widening circuit module and close the second signal. The circuit is capable of decreasing the hardware overhead and reducing the working voltage and power consumption under the premise of effectively correcting time sequence errors.
Owner:SHANGHAI JIAO TONG UNIV +1
Method for observing magnetic materials by cold field scanning electron microscope
PendingCN108169264AReduce interactionReduce adverse effectsMaterial analysis by measuring secondary emissionFerromagnetismMolecular physics
The invention provides a method for observing magnetic materials by a cold field scanning electron microscope. The method solves the technical problems that ferromagnetic materials cannot be observedby the cold field electron microscope. The problems of fixing and observing of the ferromagnetic materials can be realized by equipment self-design and modification and experimental method modifying.On one hand, by self-design of a sample table, the problem of sample fixing can be solved, on the other hand, by innovation of observation conditions and parameters of the electron microscope and a shooting method, the observation effect of the ferromagnetic materials can be solved. The advantages of the method are that the new sample table can avoid damage to an electron microscope objective lensby magnetic samples, the experimental efficiency can be greatly improved, and the sample preparation process is simplified. In addition, the limitation of the cold field scanning electron microscopefor the ferromagnetic materials can also be broken, undifferentiated observation can be achieved, and the use scope of the cold field electron microscope can be expanded.
Owner:UNIV OF SCI & TECH BEIJING
Manufacturing device for working mode band of micro-pyramid arraying structure and manufacturing method for manufacturing device
PendingCN110714211AAvoid damageIncrease the frequency of reuseElectroforming processesMechanical engineeringMold removal
The invention discloses a manufacturing device for a working mode band of a micro-pyramid arraying structure and a manufacturing method for the manufacturing device. The manufacturing method comprisesa cylinder, and a mother mold, the mother mold is arranged on the inner surface of the cylinder, the micro-pyramid arraying structure is arranged on the surface of the side, away from the inner surface of the cylinder, of the mother mold, the cylinder comprises a first arc supporting plate, a second arc supporting plate, a hinge, and a locking device, the first arc supporting plate is hinged to one end of the second arc supporting plate through the hinge rotatably, the first arc supporting plate and the other end of the second arc supporting plate are connected and locked through the lockingdevice, a first opening and closing edge and a second opening and closing edge are arranged on the mother mold, and the first opening and closing edge is tightly matched with the second opening and closing edge. The manufacturing device can give sufficient rigidity to the mother mold, the mother mold damage due to deformation such as twisting and bending in the demoulding process is reduced, demoulding of the mother mold is facilitated, the reusing frequency of the mother mold is improved accordingly, and the quality level of obtained working mold band slicing seams is effectively improved.
Owner:ZHEJIANG DAOMING OPTOELECTRONICS TECH
Non-bur CMOS radio frequency divider based on phase switch
ActiveCN101202544AReduce usageWork fasterPulse automatic controlCounting chain synchronous pulse countersCMOSDual mode
The invention discloses a no-burr CMOS RF frequency divider which is based on multi-phase shifting. The invention can implement dual mode output of 4 / 5 division frequency ratio, radically eliminates the possibility of burr signal generation when the phase is shifted, and improves the working speed of the RF frequency divider. The no-burr CMOS RF frequency divider comprises a four-phase prescaler which is used for providing four benchmark signals with difference of 90 DEG sequentially to a high-speed output selection circuit; the output terminal of the high-speed output selection circuit comprises a 'logic or' operation; a logic control circuit is used for outputting enabling signals which can be shifted according to the output signals of the high-speed output selection circuit.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP
Power good signal output method and device
ActiveCN105679226AImprove performanceAddress competitionStatic indicating devicesControl theoryFlag signals
The invention provides a power good signal output method and a power good signal output device. The power good signal output device comprises a voltage dividing module, a forward direction judgment module or a reverse direction judgment module, a logic and gate, wherein the voltage dividing module is provide with an enable switch and is used for converting an input power supply voltage into a detection divided voltage to be judged, and the enable switch responds to an enable signal; the detection divided voltage is judged by means of the forward direction judgment module when the enable switch is connected to a position closed to a high potential end in the voltage dividing module, the detection divided voltage is judged by means of the reverse direction judgment module when the enable switch is connected to a position closed to a low potential end in the voltage dividing module, and a marking signal is output; and the logic and gate is used for processing the enable signal and the marking signal, and outputting a power good signal. The power good signal output method and the power good signal output device can achieve zero-power-consumption static current in a deep sleep or shutdown mode, can solve the competition and risk problems caused by different time delay of the enable switch and the judgment module, eliminates burr phenomenon in actual response output, and increases judgment accuracy of a power good state.
Owner:GALAXYCORE SHANGHAI
Controller for electric vehicle
InactiveCN101346048ASolve the problem of sealing and waterproofingImprove sealing and waterproof performanceElectrical apparatus casings/cabinets/drawersElectric vehicleControl theory
The invention discloses an electric vehicle control equipment to provide an electric vehicle controller with advantages of good performance, convenient in maintaining and low production cost. The electric vehicle controller comprises a cavity type shell, a circuit board disposed in the shell and an end cap disposed on the outer end of the shell, and an inner pad disposed between the shell and the end cap. An inner protuberant ring rib (21), which fits tightly inner surface of the shell, is formed on the end cap; an inner protuberant ring rib (31), which is embed into the inner surface of the rib (21), is formed on the end cap; and the rib (31) supports the rib (21). The controller in the invention achieves better sealing and waterproof performance, simple installation and convenient maintenance, is a replacing product to the existing electric vehicle controller.
Owner:TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD
A loudspeaker structure
ActiveCN106303855BLower the altitudeFirmly connectedLoudspeaker transducer fixingFrequency/directions obtaining arrangementsEngineeringLoudspeaker
The invention discloses a novel loudspeaker structure, including magnets, T irons, basin frame, washers, voice coils, elastic waves, dust caps, drum paper and spacers, the drum paper is provided with rings, and the spacers are located on the basin frame Below the outer edge, the magnet is located above the T iron, and a magnetic gap is formed between Wasser and the T iron, and the voice coil is arranged in the magnetic gap, and the voice coil includes a voice coil wire part and a voice coil tube part; A riveting groove is provided on the outer side of the washer, and the washer is riveted and fixed to the pot frame through the riveting groove. The voice coil is respectively bonded and fixed to the dust cap and the drum paper at the voice coil tube, and the dust cap and the drum paper are also bonded and fixed. The new loudspeaker provided by the present invention, by setting riveting groove points on the outer side of the washer, and riveting tightly with the pot frame, not only reduces the overall height of the speaker, but also ensures more space for the elastic wave to descend, and ensures the pot frame The firmness of the connection ensures the safety of vibration and drop after the speaker is packed, and meets the application requirements of small-diameter speakers.
Owner:TYMPHANY HK
Power good signal output method and device
ActiveCN105679226BImprove performanceAddress competitionStatic indicating devicesControl theoryFlag signals
The invention provides a power good signal output method and a power good signal output device. The power good signal output device comprises a voltage dividing module, a forward direction judgment module or a reverse direction judgment module, a logic and gate, wherein the voltage dividing module is provide with an enable switch and is used for converting an input power supply voltage into a detection divided voltage to be judged, and the enable switch responds to an enable signal; the detection divided voltage is judged by means of the forward direction judgment module when the enable switch is connected to a position closed to a high potential end in the voltage dividing module, the detection divided voltage is judged by means of the reverse direction judgment module when the enable switch is connected to a position closed to a low potential end in the voltage dividing module, and a marking signal is output; and the logic and gate is used for processing the enable signal and the marking signal, and outputting a power good signal. The power good signal output method and the power good signal output device can achieve zero-power-consumption static current in a deep sleep or shutdown mode, can solve the competition and risk problems caused by different time delay of the enable switch and the judgment module, eliminates burr phenomenon in actual response output, and increases judgment accuracy of a power good state.
Owner:GALAXYCORE SHANGHAI
A kind of multi-sensor fusion dynamic balance analysis method, system, equipment, medium
ActiveCN113884236BEliminate distractionsAchieve dynamic balanceStatic/dynamic balance measurementSensor fusionControl theory
Owner:XIDIAN UNIV
A multifunctional nozzle of a fused deposition 3D printer
ActiveCN110435131BEasy to cleanPrevent slippingManufacturing heating elementsManufacturing recyclingComputer printingEngineering
The invention discloses a multifunctional nozzle of a fused deposition type 3D printer, which comprises a nozzle body, on which a high-pressure gas conveying device, a gas conveying layer and a gas guiding device are arranged; the high-pressure gas conveying device passes through the gas conveying layer It communicates with the air guide device, the air guide device is arranged at the nozzle mouth of the nozzle body, the inner ring of the air guide device is provided with three ring-type air passages, and the tails of the three ring-type air passages are connected, and the connecting parts are provided with a swing Air valve, the swing air valve is used to switch the on-off of different air passages and the high-pressure gas delivery device; the three annular air passages communicate with the nozzle openings respectively. When the nozzle completes the work of a printing area, stops spraying and is about to move into the next printing area, the middle air channel and the lower air channel spray air at the same time, blocking the molten raw material that is about to slide down at the nozzle mouth and making the printing that has not been completely solidified The layer is fused with the bottom printing layer; when the printing work is finished, the upper air channel continues to spray air to clean the nozzle body.
Owner:ZHEJIANG OCEAN UNIV
Multi-phase clock switching device and method thereof
ActiveUS8923466B2Eliminate glitchesImprove signal qualityAngle demodulation by phase difference detectionSynchronising arrangementSwitching signalMulti phase
A multi-phase clock switching device includes a plurality of phase selection circuits. The phase selection circuit is used to receive a plurality of phase clock signals and determine how to output the phase clock signals to generate an output signal according to a switching signal. The phase selection circuit includes a selection unit and a protection unit. The selection unit receives at least a phase clock signal and determines how to output a phase clock signal according to the at least a phase clock signal and a selection signal. The protection unit determines how to generate the selection signal according to the phase clock signal and the switching signal.
Owner:REALTEK SEMICON CORP
A mechanical-hydraulic servo control device for pure rolling steering of multi-axle vehicles
ActiveCN104742966BPrecise Pure Roll SteeringImprove reliabilitySteering linkagesFluid steeringNegative feedbackSteering wheel
The invention discloses a mechanical-hydraulic servo control device for multi-shaft automobile pure rolling steering. The mechanical-hydraulic servo control device is applied to the field of automobile steering. The mechanical-hydraulic servo control device mainly comprises a switch valve, a pressure reducing valve, a one-way valve, a transverse pull rod telescoping cylinder, a mechanical-hydraulic servo control valve, an angular displacement amplifying mechanism and the like. The mechanical-hydraulic servo control valve is used for carrying out servo control over the transverse pull rod telescoping cylinder, and it is effectively ensured that all steering wheels meet the Ackerman steering condition; by means of negative feedback control of the transverse pull rod telescoping cylinder and the mechanical-hydraulic servo control valve, high-precision dynamic pure rolling steering of an automobile is achieved; oil is supplemented to a feedback cavity automatically through the switch valve, the pressure reducing valve and the one-way valve, and generation of negative pressure is eliminated. Preferably, by means of a segmented multi-stage cam curve in the mechanical-hydraulic servo control device, the transverse pull rod telescoping cylinder can be locked mechanically and hydraulically, the risk in the high-speed traveling process is reduced while the pure rolling steering effect of the system is guaranteed, and the safety of high-speed traveling of the multi-shaft automobile is promoted.
Owner:FUZHOU UNIV
A method and device for extracting removal function of magnetorheological polishing
ActiveCN110245317BEfficient extractionImprove accuracyComplex mathematical operationsPolishingEngineering
The invention discloses a method and device for extracting a magneto-rheological polishing removal function. The method includes: acquiring surface shape detection data of a substrate element before and after spot sampling; position marks are placed on the edge of the substrate element ; According to the surface shape detection data and the position mark of the substrate element before and after the spot picking, calculate the residual data; carry out median filter processing to the residual data; filter the residual data after processing , using an elliptic arc to approximate the contour of the removal function, and generating multiple removal functions containing the same parameter; performing data offset and averaging operations on the plurality of removal functions containing the same parameter, and extracting the removal function. The method can accurately extract the removal function of magnetorheological polishing, and improve the accuracy of removal function and the precision of magnetorheological processing.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
Programmable asynchronous triggering time delayer, and method of use
InactiveCN100361388CSimple structureEasy to integrateSingle output arrangementsEngineeringControl delay
The invention includes following parts and structures: triggering delayer includes several pieces of T'trigger connected to each other one by one in sequence; output end of the previous T'trigger is connected to CLK end of the next T'trigger; CLK end of first T'trigger is connected to external clock pulse; output end of the last T'trigger is the output end of the delayed signal. Method of use is as following: setting up RST end and SET end of each trigger according to delay time, and then disabling two pieces of input end; inputting fixed clock pulse. Using the output of final trigger as delayed output signal, the invention simplifies structure of circuit, and solves the issue that additional gate control circuit is needed in general asynchronous trigger. Features are: easy of changing or controlling delayed time, and suitable to instance of large delayed time needed.
Owner:科圆半导体(上海)有限公司
Asynchronous counter
PendingCN113162609AEliminate glitchesReduce difficultyCounting chain asynchronous pulse countersReal-time computingHemt circuits
The invention discloses an asynchronous counter, which comprises an asynchronous counting circuit, a numerical value comparison circuit and a feedback reset circuit, and is characterized in that the feedback reset circuit is used for generating a second reset signal in a first state or a second state based on a counting clock signal and a comparison control signal, so the asynchronous counting circuit performs resetting or counting operation according to the state of the second reset signal, and the duration of the second reset signal is equal to preset time, namely, the feedback reset circuit delays the state of the comparison control signal to a certain degree; the second reset signal with the duration equal to the preset time is generated, so that when the reset operation needs to be carried out, the second reset signal with the longer duration can eliminate the phenomenon that the circuit generates a burr signal due to the fact that the retention time of the reset signal is too short, and the difficulty of time sequence analysis is reduced.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI
Power good signal output method and device
ActiveCN105654885BImprove the accuracy of judgmentAddress competitionStatic indicating devicesControl engineeringFlip-flop
The present invention provides a method and device for outputting a power good signal. The device includes: a voltage dividing module with an enabling switch, which is used to convert the input power supply voltage into a detection divided voltage that can be judged. The enabling switch In response to the enable signal, the power supply voltage is a positive value or a negative value; a forward judgment module or a reverse judgment module is used to judge the detection divided voltage and output a flag signal; a trigger is used to process the enable Signal and flag signal, output power good signal. The present invention uses a trigger to process the enable signal and the flag signal to output the power good signal, which can not only realize the static current of zero power consumption in the deep sleep or shutdown mode, but also solve the competition caused by the different delays of the enable switch and the judgment module And risky problems, eliminate the glitch phenomenon in the actual response output, improve the judgment accuracy of the good state of the power supply, and improve the overall performance of the display driver chip.
Owner:GALAXYCORE SHANGHAI
Controller for electric vehicle
InactiveCN101346048BSolve the problem of sealing and waterproofingImprove sealing and waterproof performanceElectrical apparatus casings/cabinets/drawersElectric vehicleControl theory
Owner:TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD
Non-bur CMOS radio frequency divider based on phase switch
ActiveCN100576747CReduce usageWork fasterPulse automatic controlCounting chain synchronous pulse countersCMOSDual mode
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP
A sub-pixel positioning method for centerline laser center in 3D laser scanning system
ActiveCN107203973BEffectively remove burrsEliminate glitchesImage enhancementImage analysisLaser scanningThresholding
The invention discloses a sub-pixel positioning method for the midline laser center of a three-dimensional laser scanning system. Threshold segmentation is performed on the image, and the line laser is roughly extracted; the burr phenomenon of the line laser after rough extraction is eliminated, and the width of the line laser is further reduced; the sub-pixel level coordinates of the center of the line laser are obtained by using the improved center of gravity method, and then the Hough transform is used Corrects false object pixels in sub-pixel coordinates. This positioning method combines the improved center-of-gravity method and Hough transform, which can meet the needs of the 3D laser scanning system to obtain the sub-pixel coordinates of the line laser center in real time and accurately, and realize the sub-pixel precise positioning of the line laser center.
Owner:JIANGSU UNIV OF SCI & TECH
Synchronous clock extraction method for receiving end in fully digital spread spectrum communication system
InactiveCN102801441BEliminate glitchesTransmissionCommunications systemField-programmable gate array
The invention relates to the field of fully digital spread spectrum and discloses a synchronous clock extraction method for a receiving end in a fully digital spread spectrum communication system. The received data and PN codes or reverse codes of the PN codes are subjected to autocorrelation operation respectively at the receiving end, the obtained value of the clock signal frame-clk0 can serve as the end mark when the receiving end receives a complete spreading code in case of the absence of noise in the channel, and the complete spreading code refers to the spread data received in an original bit clock period; however, when the data are transmitted in the channel with noise, severe burr phenomena exist in the frame-clk0, the frame-clk0 cannot accurately serve as a synchronous clock of a receiving end decoding module, the coarse clock signal frame-clk0 containing burrs is subjected to repeated shift addition processing to obtain an accurate clock signal frame-clk so as to serve as a synchronous clock of the spread spectrum receiving end through the programmability of a field programmable gate array (FPGA), and the decoding error phenomenon caused by the asynchronous clock can be avoided.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Joint ring of special particulate filter for civil air defence
PendingCN109482015ASolve the problem of waste of large-area stamping surplus materialsReasonable structureDispersed particle filtrationParticulatesFastener
The invention relates to a joint ring of a special particulate filter for civil air defence. The joint ring comprises a ring body which is molded integrally by welding right-angle edge in a circle; amount port is formed in the middle of the ring body; the ring body comprises a horizontal connecting ring and a vertical connecting ring which are molded integrally; fixing holes are formed in the side wall of the vertical connecting ring, and fasteners are arranged at the outer edge of the vertical connecting ring. The joint ring is molded reliably and free of burrs; besides, material cost is saved and processing reliability is improved by application of the joint ring.
Owner:江苏中豪神庞科技有限公司
Method and system for adjusting abnormal zero signal of single-live-wire dimming double-control switch
ActiveCN112165752AEasy to adaptEliminate glitchesElectrical apparatusEnergy saving control techniquesSilicon-controlled rectifierFilter algorithm
The invention discloses a method for adjusting an abnormal zero signal of a single-live-wire dimming double-control switch. The method comprises the following steps: acquiring a signal period; judgingwhether the signal period is abnormal or not; when the signal period is abnormal, executing an adjusting action; judging whether the signal period is abnormal or not by obtaining the time differenceof two adjacent signal falling edge zero-crossing interruptions; when the time difference is not equal to a first preset value, determining that the signal period is abnormal; and when the time difference is equal to the first preset value, determining that the signal period is normal. Compared with the prior art, the method and the system have the following beneficial effects that the single-firesilicon controlled rectifier dimmer switch product can eliminate burr signals by adopting a filtering algorithm, and can better adapt to LED lamps of different brands.
Owner:HANGZHOU TUYA INFORMATION TECH CO LTD
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