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63results about How to "Reduce coupling interference" patented technology
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An LTCC stack coupled feed circularly polarized microstrip patch antenna
InactiveCN102280699AReduce coupling interferenceAdjustable resonant center frequencyRadiating elements structural formsAntenna earthingsMicrostrip patch antennaPhase shifted
The invention relates to an LTCC laminated coupling feed circularly polarized microstrip patch antenna, which belongs to the technical field of antennas. Including the feeding layer and the radiation layer dielectric substrate; the upper surface of the feeding layer dielectric substrate is a grounding metal layer with a "cross" shaped hollow area, and the lower surface has a feeding circuit and a shielding metal layer insulated from the feeding circuit; the feeding circuit Divide and phase-shift the incoming excitation signal into four branch excitation signals with equal amplitude and 90° phase difference, and couple to the radiation metal layer through the "cross" hollow area; the ground metal layer and the shielding metal layer pass through The evenly distributed metallized through holes are connected to each other; the radiation metal layer on the upper surface of the radiation layer dielectric substrate is a fractal pattern structure. The patches are formed iteratively in this way. The invention has the advantages of low profile, wide frequency band, circular polarization and miniaturization.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
A silicon resonant air pressure sensor based on microelectromechanical technology
ActiveCN102297741AChange the resonant frequencyRealize measurementFluid pressure measurement by electric/magnetic elementsPiezoelectric/electrostrictive devicesPressure differenceGas pressure transducer
The invention discloses a silicon resonant air pressure sensor based on Micro-Electro-Mechanical Systems (MEMS), the air pressure sensor mainly comprises a resonance beam membrane silicon chip, a lower cover substrate, a support substrate, a metal tube seat and a tube cap. The lower cover substrate and the resonance beam membrane silicon chip are in vacuum bonding to form a reference vacuum cavity, and the support substrate which is relatively small is fixed on the metal tube seat to isolate packaging stress and thermal stress. According to pressure difference between atmosphere to be measured and the reference vacuum cavity, axial direction stress of a clamped microstructure beam on a pressure membrane is changed, thus resonant frequency of the beam is changed, change of the resonant frequency is detected and air pressure measurement is realized. According to the invention, a resonator is placed in an air pressure medium, packaging difficulty is lowered substantially, and the packaging stress and thermal stress are isolated through cantilever supporting. The silicon resonant air pressure sensor has the advantages of simple manufacture and packaging, good stability and the like, and is suitable for high performance air pressure measurement.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI
Array substrate, display panel and display device
ActiveCN106647071AReduce coupling interferenceGuaranteed light transmittanceNon-linear opticsInput/output processes for data processingDistributed structureTransmittance
The application discloses an array substrate, a display panel and a display device; the array substrate comprises a fan-out wire walking and distributing structure; the fan-out wire walking and distributing structure comprises a first fan-out walking wire and a second fan-out walking wire; the first fan-out walking wire and the second fan-out walking wire are insulated to each other; the fan-out wire walking and distributing structure at least comprises a front end wire distribution zone, a middle gluing zone and a back end wire distribution zone; the front projections of the parts where the first fan-out walking wire and the second fan-out walking wire are located at the front end wire distribution zone on the plane of the array substrate are not overlapped to each other; the front projections of the parts where the first fan-out walking wire and the second fan-out walking wire are located at the middle gluing zone on the plane of the array substrate are overlapped to each other; the front projections of the parts where the first fan-out walking wire and the second fan-out walking wire are located at the back end wire distribution zone on the plane of the array substrate are not overlapped; the middle gluing zone is used for coating the first sealing glue layer on the array substrate. The manner can guarantee the light transmittance of the gluing zone, so that the sealing glue can be fully cured to avoid liquid crystal leakage.
Owner:SHANGHAI AVIC OPTOELECTRONICS
Elastic measuring head in three-dimensional micro-nano contact scanning probe
The invention discloses an elastic measuring head in a three-dimensional micro-nano contact scanning probe. The elastic measuring head is characterized in that: a cross suspension piece is arranged in the center of a fixed circular ring; a cantilever spring plate is connected to the arm end of each cantilever in the cross suspension piece, and the other end of each cantilever spring plate is connected with the fixed circular ring to form a suspension structure of the cross suspension piece in the fixed circular ring; on a side plane, towards the inside of a cylinder body, of the cross suspension piece, a center plane reflective mirror is arranged in the center of the cross suspension piece, and a cantilever plane reflective mirror is arranged on the arm end part of at least one cantilever which is positioned at the cross suspension piece; and on a side plate, towards the outside of the cylinder body, of the cross suspension piece, a scanning probe is fixedly arranged in the center of the cross suspension piece, and a measuring ball positioned at the foremost end of the scanning probe is fixedly arranged on the end part of the scanning probe. The elastic measuring head disclosed by the invention can obtain detection effects with wide measuring range, high accuracy, high sensitivity and small measured force.
Owner:HEFEI UNIV OF TECH
Three-dimensional micro nanometer contact scanning probe
The invention discloses a three-dimensional micro nanometer contact scanning probe, which is characterized in that in the front section of a cylinder, a Michelson interferometer is fixedly arranged in an installation box; in a rear section of the cylinder, a two-dimensional sensor is fixedly installed on an installation plate; a fixing ring is arranged at the front end of the front section of thecylinder, a cross suspension sheet is arranged in the center of the fixing ring, each cantilever of the cross suspension sheet is connected with the fixing ring through each cantilever spring sheet to form a suspension structure, a central planar reflection mirror and at least one cantilever planar reflection mirror are respectively positioned on the cross suspension sheet, emergent light of the Michelson interferometer is projected on the central planar reflection mirror, emergent light of the two-dimensional sensor is projected on the cantilever planar reflection mirror, and on one side plane of the cross suspension sheet towards the outside of the cylinder, the scanning probe is fixedly installed in the center of the cross suspension sheet. The three-line structured light machine vision width measurement method can acquire detection effects with large range, high accuracy, high flexibility and small measurement force.
Owner:HEFEI UNIV OF TECH
Antenna device for hearing instruments
ActiveCN104244156AIncrease heightImprove efficiencyIn the ear hearing aidsAntenna supports/mountingsCouplingElectromagnetic interference
Abstract Antenna device for hearing instruments The disclosure relates to an antenna device for hearing instruments, especially for hearing instruments to be worn in the auditory canal. A need exists specifying a hearing instrument, especially ITE hearing instrument having a data transmission system improved in respect of transmission bandwidth with no increase or only an insignificant increase in space and energy requirement. Disclosed an antenna device for a hearing instrument with an antenna arrangement (16) having a preferred send and receive spatial direction, and a further electrical hearing instrument component (13) which emits noise radiation predominantly in a noise radiation spatial direction. The antenna arrangement (16) and the further hearing instrument component (13) are disposed so that the send and receive spatial direction and the noise radiation spatial direction are oriented transverse to one another in such a way that a coupling-in of noise radiation into the antenna arrangement is reduced. The reduction of the noise couplings into the antenna arrangement makes possible a higher send and receive bandwidth, with the installation volume and energy requirement remaining the same. The further hearing instrument component can involve a receiver or any other component, especially one emitting inductive or electromagnetic radiation.
Owner:SIVANTOS PTE LTD
And/not gate type non-volatility memory and manufacturing method and operation method therefor
InactiveCN101118907AReduce coupling interferenceHelp to operateSemiconductor/solid-state device detailsSolid-state devicesStorage cellEngineering
A non-logic gate and non-volatile memory has a plurality of memory cell rows; each memory cell row includes a source region and a drain region, a plurality of memory cells, a plurality of transmission grids, a first selection transistor and a second selection transistor; wherein, the source region and the drain region are arranged in a base board, a plurality of memory cells are positioned on the base board between the source region and the drain region, and each memory cell comprises a memory cell and a transistor, and the memory cell is connected with the transistor in parallel. Moreover, the transmission grids are respectively mounted on the base board between two neighboring memory cells and connect the memory cells in series, and the first selection transistor and the second selection transistor are respectively connected with two memory cells outside and are respectively next to the source region and the grain region.
Owner:POWERCHIP SEMICON CORP
Wideband dual-circularly polarized microstrip-to-waveguide feeding source antenna system
PendingCN110021816AGuaranteed isolationSimple structureRadiating elements structural formsAntenna earthingsOptoelectronicsWave band
The invention discloses an antenna system. The antenna system comprises an electric bridge, upper-layer metal ground, an upper-layer substrate, a lower-layer substrate, lower-layer metal ground, a radiation patch, a mode converter, a circular waveguide and a metal via hole, wherein the antenna system is of a multi-layer plate structure sequentially comprising the upper-layer metal ground, the upper-layer substrate, the lower-layer substrate and the lower-layer metal ground from top to bottom, the radiation patch is arranged at an upper side of the upper-layer substrate, the mode converter is arranged on the radiation patch and is connected to the circular waveguide on the radiation patch, the electric bridge forms a feeding network, and two ports of the electric bridge are arranged betweenthe upper-layer substrate and the lower-layer substrate. With the adoption of the feeding source antenna system, wideband and dual-circularly polarization within a millimeter wave band can be achieved, and a transceiving port is enabled to have good isolation; and meanwhile, mode conversion from microstrip antenna to circular waveguide is achieved, the antenna system is simple and efficient in structure, the circular polarization performance is not changed, and the antenna system can be used as feeding sources of various types of antennas.
Owner:MICROCREATIVE TECH CO LTD
Low-grayscale optimization PWM algorithm for LED driving chip
InactiveCN112116892AImprove display uniformityImprove the display effectStatic indicating devicesLED displayAlgorithm
The invention discloses a low-grayscale optimization PWM algorithm for an LED driving chip, and belongs to the field LED display. The algorithm comprises the steps: averagely distributing 2N GCLKs required for displaying N-bit grayscale data to 2L sub-periods, wherein each sub-period comprises 2H GCLKs, N, H and L are positive integers, and N = H + L; setting an optimization level Opt which is a non-negative integer, and setting the minimum PWM in each sub-period as 2Opt; when the grayscale data is integral multiples of 2L + Opt, averagely distributing the grayscale data to 2L sub-periods; when the grayscale data is not integral multiples of 2L + Opt, multiplying the highest bit to the (L + Opt + 1) th bit of the binary grayscale data by 2L + Opt, and averagely distributing the obtained product to 2L sub-periods; dividing the low (L + Opt) bit of the binary grayscale data by the 2Opt to obtain a quotient D and a remainder R; allocating R GCLKs in the zeroth sub-period; and dividing theremaining gray values into D groups so that each group has 2opt GCLKs, and and distributing the GCLKs to the sub-period 1 to the sub-period 2L1 by taking the group as a unit. The display effect during low grayscale can be effectively improved, and the problems of low grayscale pocking marks, low grayscale display unevenness and the like are solved.
Owner:CHINA KEY SYST & INTEGRATED CIRCUIT
Quartz pitchfork gyroscope with built-in integrated charge amplifier
ActiveCN104316039AImprove stabilityImprove reliabilitySpeed measurement using gyroscopic effectsGyroscopes/turn-sensitive devicesCapacitanceGyroscope
The invention discloses a quartz pitchfork gyroscope with a built-in integrated charge amplifier. The quartz pitchfork gyroscope comprises a quartz pitchfork sensitive element, a ceramic mixed integrated circuit and an encapsulating tube shell, wherein the quartz pitchfork sensitive element comprises a driving fork arm, a pickup fork arm, a torsion frame and an anchor point; the tube shell comprises a base, an upper cover plate and multiple pins; the ceramic mixed integrated circuit comprises a precision operational amplifier, a feedback resistor, a feedback capacitor and a ceramic substrate; the ceramic mixed integrated circuit extracts and amplifies induction charge from the quartz pitchfork gyroscope pickup fork arm into a voltage signal and outputs onto the pin of the tube shell. Direct output of weak charge signals is avoided, the influence of pollutants including residual soldering flux, lead distributed capacitance, dust, insulating varnish and water vapour and outside circuit noise on the charge extraction and amplification in the welding process can be effectively solved, the stability and signal-to-noise ratio for detecting quartz pitchfork gyroscope weak charge signals are enhanced, and the environmental adaptation and detection precision of the quartz pitchfork gyroscope are improved.
Owner:BEIJING RES INST OF TELEMETRY +1
Touch-control display panel
ActiveCN105573556AIncrease the separation distanceReduce coupling interferenceInput/output processes for data processingOptoelectronicsElectrode
The invention discloses a touch-control display panel. The touch-control display panel comprises an array substrate and an opposite substrate, and the opposite substrate and the array substrate are arranged oppositely; at least two first electrode strips which extend in the first direction and are arranged in the second direction are arranged on the array substrate, and at least one second electrode strip is arranged between every two adjacent first electrode strips; at least two third electrode strips which are arranged in the first direction and extend in the second direction are arranged on the opposite substrate, and the second direction is perpendicular to the first direction. In the display stage, the first electrode strips and the second electrode strips both receive public voltage signals; in the touch-control stage, the first electrode strips receive a touch-control driving signal, and the second electrode strips receive a constant voltage signal. According to the touch-control display panel, the spacing distance between every two adjacent first electrode strips is increased, coupling interference between every two adjacent first electrode strips is reduced, and the occurrence possibility of electrostatic wounding is reduced.
Owner:SHANGHAI AVIC OPTOELECTRONICS +1
Method for reducing coupling interference of electrostatic micro-mirror angle detection sensor
ActiveCN111348618AReduce coupling interferenceImprove signal-to-noise ratioFinal product manufactureDecorative surface effectsSemiconductor materialsSignal on
For improving the impedance of an equivalent coupling circuit and obviously reducing coupling interference of the driving signal on the detection signal, the invention provides a method for reducing coupling interference of an electrostatic micro-mirror angle detection sensor. Specifically, in the process of manufacturing the micro-mirror by adopting a high-resistivity semiconductor material, element doping is carried out on driving comb teeth and detection comb teeth of the micro-mirror and a lead area between the comb teeth and a bonding pad, then a micro-mirror structure is etched, and finally the micro-mirror capable of reducing the coupling interference of the angle detection sensor is obtained. According to the method, the coupling interference of the driving signal in the electrostatic micromirror on the angle detection signal can be remarkably reduced, the signal-to-noise ratio of the detection signal is improved, and the complexity of a processing circuit is reduced. Meanwhile, the method does not need to change the structure of the micro-mirror, and greatly improves the control precision of the micro-mirror on the basis of the same structure and similar process difficulty.
Owner:XIAN CHISHINE OPTOELECTRONICS TECH CO LTD
Decoupling microstrip array antenna
ActiveCN106486766AReduce coupling interferenceLow profileParticular array feeding systemsAntenna couplingsMicrostrip array antennaCommunications system
The invention provides a decoupling microstrip array antenna. The decoupling microstrip array antenna comprises a microstrip dielectric plate, wherein multiple groups of microstrip arrays are arranged on the microstrip dielectric plate, the microstrip arrays are formed by connecting a plurality of microstrip patch units in series, a transmission line lattice network is arranged between adjacent groups of microstrip arrays, metal via holes are further informed in the microstrip dielectric plate, the transmission line lattice network communicates with a metal grounding layer through the metal via holes, and a feeding network communicates with a back surface of the microstrip dielectric plate through the metal via holes. In the decoupling microstrip array antenna provided by the invention, the coupling interference between array antennas is substantially reduced with the adoption of the metal via holes and transmission line lattices, and the decoupling microstrip array antenna has the advantages of high isolation, miniaturization, low profile, high grain and easiness in carrier conformality, and can be applied to the technical field of radar, remote sensing, electronic countermeasure and wireless communication systems.
Owner:SHANGHAI SUSR TELECOM TECH
High-precision universal alternative and direct current measuring device
PendingCN106018912AReduce coupling interferenceIncreased frequency rangeVoltage/current isolationClosed loopConductor Coil
A high-precision universal alternative and direct current measuring device comprises a casing, magnetic core windings and a circuit board, wherein the magnetic core windings and the circuit board are arranged in the casing. Magnetic cores of the magnetic core windings are made of soft magnetic materials of high magnetic conductivity and low residual magnetism, and two measuring heads of the same performance but different in winding directions are included, closure is complete, and no air gap exists; windings of the magnetic core windings are wound by high voltage resistant enameled wires, each magnetic core comprises the measuring head and a mutual inductive magnetic core, and all the magnetic cores are placed in a radome to play a strict magnetic shielding role; and the radome is of a multilayer structure and has both a magnetic field shielding function and an electric field shielding function, and thus, the current measuring precision can be improved. The measuring device includes a compensation winding which is used compensate a magnetic field generated by measured current at any time, so that only a magnetic field generated by exciting current but not other magnetic fields exists in the measuring heads, namely, a closed-loop magnetic flux gate principle is realized.
Owner:北京柏艾斯科技有限公司
Active surface myoelectricity detection probe adopting optical fiber transmission
InactiveCN104287728AAvoid interferenceAvoid power frequency interferenceDiagnostic recording/measuringSensorsMicrocontrollerSource transformation
The invention relates to an active surface myoelectricity detection probe adopting optical fiber transmission. The active surface myoelectricity detection probe adopting optical fiber transmission comprises a power source transformation and management module. The active surface myoelectricity detection probe adopting optical fiber transmission is characterized by further comprising an active probe body, wherein the active probe body comprises a reference electrode, a measuring electrode and a system control center, the system control center selects the measuring electrode and the reference electrode as a measuring pair in a time sharing mode through a single-chip microcomputer, the potential difference of the measuring pair is fed into a differential amplification circuit through an electronic simulation switch so that amplification and filtering can be carried out, and the detection probe transmits collected data to an upper computer through optical fibers in a one-way mode. The active surface myoelectricity detection probe adopting optical fiber transmission can solve the problems in the prior art, coupling interference on electrode wires and data transmission lines can be lowered effectively, the problem of 50 Hz power frequency interference entering from a power supply power line in a coupling mode can be solved, and therefore the needs of practical situations are met.
Owner:BEIJING UNION UNIVERSITY
Hearing device with noise compensation and corresponding designing method
ActiveCN101795429AReduce coupling interferenceHearing aid design aspectsElectromagnetic interferenceEngineering
For reducing the influence of interference fields on hearing aids, a hearing aid is provided with an electronic component into which a first and a second electromagnetic disturbance component can be injected by providing a predetermined electromagnetic interference field. The electrical component is formed asymmetric and / or a compensation component is arranged on the electrical component such that the first and the second interference components largely compensate for one another. A compensation plate or an element which is provided in any case, such as a microphone, may be used as the compensation component. If the electrical component is a coil, then its core may, for example, be conical or configured such that its winding density varies.
Owner:SIVANTOS PTE LTD
Fan board and connection system of fan board
InactiveCN105353851AReduce the impactReduce coupling interferenceDigital data processing detailsEmergency protective arrangements for limiting excess voltage/currentCapacitanceElectrical resistance and conductance
The invention provides a fan board and a connection system of the fan board. The fan board comprises a voltage adsorption circuit, a voltage input control circuit and L fans, wherein L is a natural number which is not less than 2; the voltage adsorption circuit comprises a capacitor and resistors which are mutually connected in parallel, wherein the capacitor and the resistors which are mutually connected in parallel are connected in series; the other end of the capacitor is connected to the voltage input position of the fan board; the other ends of the resistors which are mutually connected in parallel are connected to the earthing position of the fan board; one end of the voltage input control circuit is connected to the voltage input position of the fan board; and the other end of the voltage input control circuit is connected with the L fans to independently output a start control signal and voltage to the L fans. The scheme can reduce the influence of surge voltage.
Owner:LANGCHAO ELECTRONIC INFORMATION IND CO LTD
Image sensor readout circuit and readout method using improved gain ADC
ActiveCN111372019AAvoid the defect of noise amplificationReduce coupling interferenceTelevision system detailsColor television detailsCapacitanceImaging quality
The invention discloses an ADC capable of improving gain. The circuit comprises a gain amplification unit, a comparator and a counter. Wherein the gain amplification unit comprises a sampling circuitand a switched capacitor amplification circuit; the switched capacitor amplifying circuit comprises a capacitor C1, a capacitor C2, a switch Kr and an amplifier; wherein the first input end of the amplifier is connected with a reference signal; a second input end of the amplifier is simultaneously connected with a sampling capacitor C1, a sampling capacitor C2 and one end of a switch Kr; the otherend of the sampling capacitor C1 is connected with the sampling circuit, the other end of the sampling capacitor C2 and the other end of the switch Kr are connected with the output end of the amplifier, the output end of the amplifier is connected with the comparator, and the output end of the comparator is connected with the counter. According to the image sensor reading circuit and reading method using the ADC capable of improving the gain, the final image noise level is low, the dynamic range and the signal-to-noise ratio are improved, and therefore the image quality of an image sensor under low illumination is improved.
Owner:CHENGDU LIGHT COLLECTOR TECH
Bipolar antenna system
ActiveCN109599666AReduce coupling interferenceParticular array feeding systemsRadiating elements structural formsDipole antennaRadio frequency
The invention provides a bipolar antenna system, comprising at least one antenna array, each of which comprises at least one vertical polarized antenna unit and at least one horizontal polarized antenna unit arranged in the same plane, wherein respective vertical polarized antenna units and horizontal polarized antenna units comprise a printed circuit board and at least one dipole antenna elementetched on the printed circuit board, the printed circuit boards are also etched with antenna connection wires and antenna feed holes, and respective dipole antenna elements are connected to the antenna feed holes after being connected in parallel via the antenna connection wires. Compared with the antenna system in the prior art, the bipolar antenna system can not only provide horizontal polarizedand vertical polarized RF links with main beam radiation characteristics, but also ensure that the coupling interference between the RFs is maintained at a low level.
Owner:康凯科技(杭州)股份有限公司
Self-adaptive guidance method based on real-time estimation of lift-drag ratio
ActiveCN104634183AImprove robustnessSteady and reasonable guidanceAiming meansControl systemSelf adaptive
Provided is a self-adaptive guidance method based on real-time estimation of a lift-drag ratio. The lift-drag ratio of a returning capsule is calculated in real time mainly through device information and guidance information of a guidance navigation and a control system of a reentry vehicle according to physical principles and definitions; real-time compensation design is carried out on reentry longitudinal flight guidance laws and transverse flight guidance laws according to the estimated lift-drag ratio, so that the influences of the fact that the lift-drag ratio deviates from a nominal design value on guidance precision are eliminated or relieved. The guidance law design, carried out according to the method, of the reentry vehicle can improve the guidance precision and the robustness of a guidance circuit, and the guidance demands of high speed aircrafts in the atmosphere can be met to the maximum extent.
Owner:BEIJING INST OF CONTROL ENG
Pulse width modulation circuit
InactiveCN103457582AAvoid problemsHigh precisionPulse duration/width modulationSystem stabilityPwm signals
The invention relates to a pulse width modulation circuit which aims to solve the problem that a PWM circuit is poor in anti-interference performance in the prior art. According to the technical scheme, the pulse width modulation circuit comprises a first comparator, a second comparator and a voltage-controlled current source circuit, wherein the input end of the voltage-controlled current source circuit is connected with oscillator output voltage, the oscillator output voltage is converted into a signal complementary with an input signal and is input into one first input end of the first comparator, the other input end of the first comparator is connected with an error amplifier output signal, the output end of the first comparator outputs a first PWM signal, one input end of the second comparator is connected with the oscillator output voltage, the other input end of the second comparator is connected with the error amplifier output signal, and the output end of the second comparator outputs a second PWM signal. The required PWM signals are generated by means of triangular wave signals which are totally symmetric, occurrence of glitches is avoided, coupling interference is reduced, and precision of a sampling circuit and stability of a system are effectively improved.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Merchant positioning system for electronic coupon and issue and positioning method of merchant positioning system
InactiveCN107451849AEasy to usePositioning data is accurateDiscounts/incentivesComputer terminalPositioning system
The invention relates to a business positioning system for electronic coupons and a coupon issuing and positioning method thereof. Wherein the merchant positioning system includes: an electronic coupon generating device for generating electronic coupons; a mobile terminal connected with the electronic coupon generating device for receiving and displaying electronic coupons and obtaining user location data; a store positioning device for respectively It is connected with the mobile terminal and the electronic coupon generating device, and is used to send the store closest to the user to the mobile terminal according to the user's location data and electronic coupons. Compared with the prior art, the present invention obtains the user's location through the mobile terminal, and pushes the nearest store to the mobile terminal based on the location, so that the most suitable store can still be selected even when there are many stores, which facilitates the use of electronic coupons.
Owner:知而行(上海)企业发展有限公司
Operation method of nitride-based flash memory and method of reducing coupling interference
ActiveUS7826262B2Reduce coupling interferenceWider operation windowRead-only memoriesDigital storageCouplingTrapping
Owner:MACRONIX INT CO LTD
Small-size angle-sensitive and control device for fluid floated inertial instrument
InactiveCN107256042AShorten the axial lengthRealize miniaturization designMechanical power/torque controlNavigation by speed/acceleration measurementsMagnetic polesMiniaturization
The invention relates to a miniaturized angle sensitive and control device applied to a liquid-floating inertial instrument, which includes a polyhedron magnetic pole mounting frame, an excitation coil, a permanent magnet, a moving coil frame, a sensor coil and a torquer coil, and the excitation coil and the permanent magnet are installed on the A stator assembly is formed on the polyhedral magnetic pole mounting frame, and a moving coil frame is arranged coaxially outside the polyhedral magnetic pole mounting frame, and sensor coils and torquer coils are arranged on the moving coil frame. The invention describes a miniaturized angle sensitive and control device applied to a liquid-floating inertial instrument. The present invention improves the structure of the sensor and torque device for the liquid-floating inertial instrument to achieve the goal of miniaturization, and can meet the index of the inertial instrument Requirements, suitable for low-precision applications in liquid-floating inertial instruments.
Owner:中国船舶重工集团公司第七〇七研究所
Measurement system
ActiveCN106656359AImprove isolationReduce disturbing noiseTransmitters monitoringReceivers monitoringCouplingAnechoic chamber
The invention discloses a measurement system. The system comprises an anechoic chamber, a rotary table, N measurement antennas (N is natural number and not less than 11); a spherical surface coordinate system is established by taking the center of a measured part as an original point; the distribution of the measurement antennas is as shown in description, wherein thetai is the positive integral multiple of 15 DEG, and at least comprises a measurement antenna at each of the theta angle of 15 DEG, 30 DEG, 45 DEG, 60 DEG, 75 DEG, 90 DEG, 105 DEG, 120 DEG, 135 DEG, 150 DEG and 165 DEG; as shown in description, and N measurement antennas are not on the same plane. The system disclosed by the invention can create a measurement environment with small coupling interference among the measurement antennas and low reflection in the small anechoic chamber, thereby improving the measurement precision.
Owner:GENERAL TEST SYST
Method for solving damage of metal oxide semiconductor (MOS) caused by highly rapid load change of voltage regulator (VR)
InactiveCN105226926AA large amount of computing processingImprove job stabilityVolume/mass flow measurementPower supply for data processingCouplingEngineering
The invention discloses a method for solving damage of a metal oxide semiconductor (MOS) caused by a highly rapid load change of a voltage regulator (VR). The method is achieved according to the following steps that in a power supply conversion chip of a server mainboard, mistaken receiving of a feedback signal by the chip is prevented by reducing the internal coupling interference of the power supply conversion chip when the load change rate is too fast, an internal logical error is further prevented from occurring, the MOS is ensured to normally work during the conversion process, and an output voltage is in a normal application range. Compared with the prior art, the method for solving the damage of the MOS caused by the highly rapid load change of the VR has the advantages that: aiming at the problem of MOS burnout caused by the highly rapid load change when the server mainboard is matched in different configurations or in different working modes, and a fault is prevented from occurring in a product during the working process and affecting normal working; and meanwhile, the method is also applicable for improving the working stability of various server circuit board cards, is high in practicability and is easy to promote.
Owner:LANGCHAO ELECTRONIC INFORMATION IND CO LTD
Electric automobile and motor controller therefor
ActiveCN110661441AReduce coupling interferenceEasy to useBatteries circuit arrangementsAC motor controlAC moduleCharge and discharge
The invention provides an electric automobile and a motor controller therefor. The motor controller comprises a first charging port and a second charging port, wherein the first charging port is connected with one end of a power battery of the electric automobile, and the second charging port is connected with the other end of the power battery; a first driving port and a second driving port; a bidirectional DC / AC module; a motor control switch; a charging and discharging control module; a controller module which is connected with the motor control switch and the charging and discharging control module, and the controller module is used for controlling the motor control switch and the charging and discharging control module according to the current working mode of the motor controller. According to the motor controller, the negative electrode of the power battery side direct-current charging port and the negative electrode of the driving direct-current bus are separately arranged, so that when the motor controller is in a charging mode, namely the motor controller is connected into an alternating-current power grid to charge the power battery, the coupling interference is small.
Owner:BYD AUTO IND CO LTD
Multi-interval optimization OSPWM algorithm
ActiveCN113793564AReduce coupling interferenceImprove the display effectStatic indicating devicesTransformation algorithmGray level
The invention discloses a multi-interval optimization OSPWM algorithm, which is implemented by the following steps of: averagely distributing 2C GCLKs for displaying C-bit gray data to 2A sub-cycles; setting a low-gray high-brush mode refresh rate threshold value F, a register L and a register H; dividing the gray data into four gray intervals, namely low gray, secondary low gray, secondary high gray and high gray; under the low gray condition, dividing gray data into D groups, wherein each group comprises L GCLKs, and the distances among the groups are equal; under the secondary low gray condition, carrying out scattering distribution with the minimum value being 1 GCLK, wherein the distances among the groups are equal; under the secondary high gray condition, setting an optimization level of a transformation algorithm to be H, wherein the minimum opening width of the algorithm is H GCLKs; dividing the redundant gray data by H to obtain a quotient D and a remainder R; reopening the quotient D groups GCLK according to a uniform scattering sequence, wherein the distances among the groups are equal, and fixedly distributing the remaining gray data R to the 0th group; and under the high gray condition, setting the gray level data to be greater than 2A*H, and carrying out scattering distribution with the minimum value being 1 GCLK, wherein the distances among the groups are equal.
Owner:CHINA KEY SYST & INTEGRATED CIRCUIT
Dual spindle piezoelectric detection gyroscope possessing magnetostriction vibrator
InactiveCN101339030BEasy to fixGood coupling interferenceSpeed measurement using gyroscopic effectsTurn-sensitive devicesGyroscopeAngular velocity
Owner:SHANGHAI JIAOTONG UNIV
Dual spindle piezoelectric detection gyroscope possessing magnetostriction vibrator
InactiveCN101339030AEasy to fixGood coupling interferenceSpeed measurement using gyroscopic effectsTurn-sensitive devicesGyroscopeAngular velocity
A dual axis piezoelectric detection gyroscope with a magnetostrictive vibrator in the micro electromechanical technical field comprises a magnetostrictive vibrator, a driving coil, an output electrode and a cantilever beam. The magnetostrictive vibrator has a structure that the two square surfaces of a cuboid are provided with square-hole holes, and the inner boundary and the outer boundary of the square-hole shape are squares. The vibration of the magnetostrictive vibrator under special model is regarded as reference vibration; the magnetostrictive vibrator in the model has special positions in both directions in which the moving directions on an upper surface and a lower surface are opposite. When the outside world has angular velocity, Coriolis force with opposite direction is generated on the opposite position of the moving direction to enable piezoelectric film to deform and generate internal stress, and the angular velocity of the outside dual axis is detected by the electric potential generated on the output electrode. The dual axis piezoelectric detection gyroscope has the advantages of simple structure, strong shock resistance, convenient fixing, sensitive dual axis detection, weak coupling interference between the reference vibration and the detection signal and power consumption saving owing to being free of high-speed rotation.
Owner:SHANGHAI JIAO TONG UNIV
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