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44results about How to "Eliminate Harmonic Interference" patented technology
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Energy storage converter and battery energy storage system of energy storage converter
ActiveCN103595063ASolve power fluctuationsImprove reliabilityEnergy industryAc network load balancingElectrical batteryLcl filter
The invention relates to an energy storage converter and a battery energy storage system of the energy storage converter. The energy storage converter comprises an AC / DC module, an LCL filter, a main contactor, an alternating current EMI filter, an alternating current side pre-charging circuit, a main circuit breaker, a CL filter, a direct current EMI filter, a direct current side pre-charging circuit and a direct current side circuit breaker, wherein the alternating current side of the AC / DC module is sequentially connected with the LCL filter, the main contactor, the alternating current EMI filter and the main circuit breaker, the alternating current side pre-charging circuit is connected to the two ends of the main contactor in parallel, the direct current side of the AC / DC module is sequentially connected with the CL filter, the direct current EMI filter and the direct current side circuit breaker, and the direct current side pre-charging circuit is connected to the two ends of the direct current side circuit breaker in parallel. According to the energy storage converter and the battery energy storage system, the problem of power fluctuation in a micro-grid is solved, and the running reliability of the micro-grid is improved.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Anti-harmonic interference device for carrier aggregation, antenna device and mobile terminal
ActiveCN106027167AEliminate Harmonic InterferenceSimple structureTransmission noise suppressionCarrier signalTransceiver
The embodiment of the invention discloses an anti-harmonic interference device for carrier aggregation, an antenna device and a mobile terminal. The anti-harmonic interference device comprises a first duplexer of which the sending terminal is connected with a first uplink interface in a power amplifier, wherein the first uplink interface is used for sending uplink signals in a first band, and the receiving terminal of the first duplexer is used for sending downlink signals in the first band to a wireless transceiver; a second duplexer of which the sending terminal is connected with a second uplink interface in the power amplifier through a first filtering unit, wherein the second uplink interface is used for sending the uplink signals in a second band, and the receiving terminal of the second duplexer is used for sending the downlink signals in the second band to the wireless transceiver, and there is overlap between the frequency of the harmonics of the uplink signals in the first band and the frequency of the downlink signals in the second band; and the first filtering unit which is used for filtering the part in the harmonics of the uplink signals in the first band overlapping with the frequency of the downlink signals in the second band. According to the embodiment of the devices and the mobile terminal, the scheme for eliminating carrier aggregation harmonic interferences is small in size and low in cost.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Vibration method and device for a vibrating wire instrument
InactiveCN102288279AAddress reliabilitySolve problems with clutterSubsonic/sonic/ultrasonic wave measurementUsing electrical meansControl signalResonance
The present invention relates to an excitation method and device of a vibrating wire instrument. The method generates a SPWM wave, and then filters the generated SPWM wave through a filter circuit to obtain a sinusoidal waveform signal, and then applies the sinusoidal waveform signal to the vibrating wire instrument. The two ends of the frequency measuring coil in the instrument generate alternating electromagnetic force under the action of the permanent magnet, which drives the steel string to generate resonance. The SPWM waveform excitation signal whose pulse width changes according to the sinusoidal waveform rule generated by the method improves the precise control ability of the excitation signal and solves various limitations caused by the traditional excitation method using a pulse square wave.
Owner:CHINA GEOKON INSTR
Passive frequency mixer
InactiveCN101483408AEliminate Harmonic InterferenceOvercome the problem of not being able to workMulti-frequency-changing modulation transferenceElectrical resistance and conductanceState of art
The present invention discloses a passive mixer which comprises an input resistance circuit that including: a first electric resistance, a second electric resistance and a switch tube that connected in series, wherein, source electrode and drain electrode of the switch tube is respectively bridge connected to two ends of the first electric resistance, and grid of the switch tube is connected to local oscillation signal VLOO while the drain electrode is connected to voltage signal VIN; a switch converting circuit that used to frequency convert electrical current signal flow from converted VIN under control of VLOO by input resistance to output frequency; electrical current voltage convert circuit that used to convert electrical current signal after frequency conversion to voltage signal to output. Through adopting switch tube in input resistance branch path, harmonic interference can be effectively dispelled, and problems like harmonic interference oversize and that leading to output desired signal most likely be inundated by harmonic interference signal hence system unable work in existing passive mixer can be overcome.
Owner:BEIJING RFMC TECH CORP
Method for eliminating harmonic interference of earthquake data
ActiveCN102073066AHigh speedEliminate Harmonic InterferenceSeismic signal processingTime domainSignal-to-noise ratio (imaging)
The invention claims a method for eliminating harmonic interference of earthquake data, comprising the following steps: according to the original waveform data in the earthquake data, determining the initial frequency of harmonic interference through the oscillation period of the original data and the maximum position of the amplitude spectrum; calculating the amplitude of the harmonic interference cosine function; and according to the earthquake data vector, the amplitude of harmonic interference cosine function, the harmonic interference cosine function vector and the target function derivative, the harmonic interference frequency amendment quantity and the time delay amendment quantity, adopting a frequency modifier formula to determine the harmonic interference frequency; and calculating the effective signal of earthquake. The method overcomes the disadvantage that the frequency domain suppresses the harmonic interference, and is quicker in speed than the time domain harmonic interference suppressing method, thereby improving the signal-to-noise ratio, and being capable of eliminating the harmonic interference in the earthquake data generated by high voltage transmission line and also eliminating the harmonic interference in the earthquake data generated by periodic vibration.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Motor operation state monitoring and management system
InactiveCN106443444ARealize intelligent controlGuaranteed speedAlarmsDynamo-electric machine testingGeneral Packet Radio ServiceMonitoring system
The invention discloses a motor operation state monitoring and management system which comprises a hidden alarm circuit, a temperature detection circuit, a vehicular storage battery, a master control CPU (central processing unit) and a watchdog. The hidden alarm circuit and a signal output end of a fire alarm circuit are connected with the master control CPU. According to the system, a traffic monitoring system has a hidden touch alarm mode, a driver touches a hidden electrode slice when emergency situations and hijack happen, so that the alarm circuit can be triggered, a microphone and a camera are turned on by the master control CPU, in-car information is recorded and transmitted to an alarm center by a GPRS (general packet radio service) module, and the system can automatically give an alarm when a fire disaster happens and has the advantages of good hidden performance and safe-protection effect and diverse functions.
Owner:BEIHAI YISHENGYUAN AGRI TRADE CO LTD
Antenna system and harmonic suppression element
ActiveUS20160323053A1High bandwidthSuppress harmonic interferenceSpatial transmit diversitySimultaneous aerial operationsHarmonicDividing circuits
An antenna system includes an antenna, a first frequency dividing circuit, a second frequency dividing circuit, and a plurality of matching circuits. The first frequency dividing circuit is coupled to the antenna. The matching circuits are coupled to the first frequency dividing circuit. The second frequency dividing circuit is coupled to the matching circuits. The matching circuits are configured to process different frequency signals, respectively.
Owner:MEDIATEK INC
Electricity saving device
ActiveCN102083267AEliminate Harmonic InterferenceTo achieve a regulated outputElectrical apparatusElectric lighting sourcesElectricityLoop control
The invention discloses an electricity saving device, comprising a system control module, a main loop control module and a chopper, wherein the main loop control module is respectively connected with the system control module and the chopper. The system control module is used for receiving the working condition data of a power grid, sent by the main loop control module, and setting the voltage reduction parameters of the main loop control module; the main loop control module is used for generating four groups of pulse width modulation signals according to the voltage reduction parameters and outputting the four groups of pulse width modulation signals to the chopper; and the chopper is used for receiving the voltage of the power grid, completing voltage reduction according to the four groups of pulse width modulation signals and outputting the voltage to loads. Based on the technical scheme, the automatic voltage stabilization type electricity saving device is provided, and by means of the technical scheme, harmonic interference is eliminated and voltage-stabilizing output is realized. In addition, according to the technical scheme, when the voltage of the power grid is lower thana preset low-voltage threshold, the power grid automatically quits an electricity-saving working state and the voltage of the power grid is directly transmitted to the loads.
Owner:BEIJING SINOBAIDE TECH
Waveform self-adaptive matching vibroseis harmonic elimination method and system
ActiveCN109655893AEliminate Harmonic InterferenceActive source effective signalSeismic signal processingSelf adaptiveAdaptive matching
The invention provides a waveform self-adaptive matching vibroseis harmonic elimination method and system. The method comprises the following steps: extracting a reference scanning signal and an output signal in a vibroseis characteristic signal; taking the reference scanning signal as a waveform matching channel, and carrying out matched filtering on the output signal and the reference scanning signal channel by adopting a self-adaptive matching method; solving amplitude change coefficients before and after filtering of the output signal; and applying the amplitude change coefficients to thefiltered output signal. According to the method, the reference scanning signal in the seismic source characteristic signal is used as a matched filtering channel, a self-adaptive filtering operator isdesigned to act on a seismic source force signal generating harmonic distortion, and harmonic interference in the force signal is eliminated. According to the method, the amplitude change coefficients of an original force signal and the filtered force signal are obtained, the filtered amplitude is processed by the coefficients, effective signal amplitude information in the force signal is effectively reserved, and finally the purpose of eliminating harmonic interference in the vibroseis force signal is achieved.
Owner:CHINA PETROLEUM & CHEM CORP +1
Circuit capable of realizing harmonic power conversion and effective method
ActiveCN106849083AIncrease powerReduce lossHarmonic reduction arrangementAc network to reduce harmonics/ripplesEffective powerCurrent electric
The invention discloses a circuit capable of realizing harmonic power conversion. The circuit comprises a resonance type harmonic current converter, wherein the input end of the resonance type harmonic current converter is connected with a power grid; in addition, the output end of the resonance type harmonic current converter is electrically connected with a user load. An LC high-power tuning method is used; the harmonic wave ingredients and the energy of the harmonic wave ingredients are independently extracted from the power grid; the effective power is output; the efficiency is highest; the loss is lowest; the principle is simplest; convenience and high speed are realized. The harmonic interference is eliminated; meanwhile, the harmonic power is changed from waste materials into valuable materials; the method belongs to novel application with the practical value in the field of current electric power energy saving fields.
Owner:上海睿源电子科技有限公司
Harmonic interference elimination method and device and receiving equipment
PendingCN112672367AImprove reception performanceEliminate Harmonic InterferenceWireless communicationInterference cancelationEngineering
The invention provides a harmonic interference elimination method and device and receiving equipment, and the method comprises the steps: carrying out the first receiving processing of a received signal, and obtaining an original signal estimation; reconstructing the original signal estimation; obtaining a noise estimation signal according to the received signal and the reconstructed signal; performing frequency domain analysis on the noise estimation signal to obtain a harmonic interference frequency point; setting the notch frequency of a notch filter according to the harmonic interference frequency point, and filtering the received signal by using the notch filter; and receiving the filtered signal for the second time. The method and the device can adaptively detect the harmonic interference frequency point, track the change of the harmonic interference frequency point, and improve the harmonic interference elimination capability of receiving equipment.
Owner:上海擎昆信息科技有限公司
Passive frequency mixer
InactiveCN101483408BEliminate Harmonic InterferenceOvercome the problem of not being able to workMulti-frequency-changing modulation transferenceElectrical resistance and conductancePower flow
The present invention discloses a passive mixer which comprises an input resistance circuit that including: a first electric resistance, a second electric resistance and a switch tube that connected in series, wherein, source electrode and drain electrode of the switch tube is respectively bridge connected to two ends of the first electric resistance, and grid of the switch tube is connected to local oscillation signal VLOO while the drain electrode is connected to voltage signal VIN; a switch converting circuit that used to frequency convert electrical current signal flow from converted VIN under control of VLOO by input resistance to output frequency; electrical current voltage convert circuit that used to convert electrical current signal after frequency conversion to voltage signal tooutput. Through adopting switch tube in input resistance branch path, harmonic interference can be effectively dispelled, and problems like harmonic interference oversize and that leading to output desired signal most likely be inundated by harmonic interference signal hence system unable work in existing passive mixer can be overcome.
Owner:BEIJING RFMC TECH CORP
Radio frequency matching circuit and radio frequency system
The invention discloses a radio frequency matching circuit and a radio frequency system. The radio frequency matching circuit comprises an L-form matching circuit, a first transmission line and a second transmission line, wherein the first transmission line and the second transmission line are connected to form two sections of open circuit transmission lines in parallel; a transmission line connection point is formed between the first transmission line and the second transmission line; the transmission line point is connected with the L-form matching circuit and can be arranged at the output end of a radio frequency power amplifier and used for an in-band signal power loss problem of the radio frequency (especial the wide frequency band radio frequency), and the echo interference is greatly reduced; the radio frequency system comprises radio frequency transmitting / receiving circuits connected in order, the above-mentioned radio frequency matching circuit, a filtering circuit and an antenna, wherein the lengths of the first transmission line and the second transmission line are different. The system disclosed by the invention can make improvement on a wide frequency band power loss problem and shorten the radio matching debugging time when changing the frequency band port impedance.
Owner:扬州茂德电子科技有限公司
An energy storage converter and its battery energy storage system
ActiveCN103595063BSolve power fluctuationsImprove reliabilityEnergy industryAc network load balancingElectrical batteryPre-charge
The invention relates to an energy storage converter and a battery energy storage system of the energy storage converter. The energy storage converter comprises an AC / DC module, an LCL filter, a main contactor, an alternating current EMI filter, an alternating current side pre-charging circuit, a main circuit breaker, a CL filter, a direct current EMI filter, a direct current side pre-charging circuit and a direct current side circuit breaker, wherein the alternating current side of the AC / DC module is sequentially connected with the LCL filter, the main contactor, the alternating current EMI filter and the main circuit breaker, the alternating current side pre-charging circuit is connected to the two ends of the main contactor in parallel, the direct current side of the AC / DC module is sequentially connected with the CL filter, the direct current EMI filter and the direct current side circuit breaker, and the direct current side pre-charging circuit is connected to the two ends of the direct current side circuit breaker in parallel. According to the energy storage converter and the battery energy storage system, the problem of power fluctuation in a micro-grid is solved, and the running reliability of the micro-grid is improved.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
Method for realizing energy conservation by reducing harmonics in power system
InactiveCN101697416AEasy to installExtended service lifeHarmonic reduction arrangementAc network to reduce harmonics/ripplesElectricityHarmonic potential
The invention discloses a method for realizing energy conservation by reducing harmonics in a power system, which solves the technical problems of power loss and energy waste caused by the harmonics in the power system. The method adopts a technical scheme comprising that: an inductive reactance current limiting device is arranged in series between an outer network and a user load and is a current limiting coil; a compensation coil coaxial with the current limiting coil is also arranged in the inductive reactance current limiting device; and an induction electromotive force generated by the compensation coil and the harmonic potential of commercial power are equal in strength and are at an angle of 180 degrees in direction. The method has the following advantages of having simple implementation, eliminating clutters and harmonic interference by winding an iron core with the coils through a mutual induction and electromagnetic balancing theory, further increasing the power and active power, having simple access, facilitating installation, bringing about high cost benefit, having remarkable electricity-saving effect, maintaining proper voltages and currents and prolonging the service life of an electricity utilization device of an electricity unit.
Owner:深圳市泽万美汇奢品科技有限公司
Method for eliminating harmonic interference of earthquake data
ActiveCN102073066BHigh speedEliminate Harmonic InterferenceSeismic signal processingTime domainSignal-to-noise ratio (imaging)
The invention claims a method for eliminating harmonic interference of earthquake data, comprising the following steps: according to the original waveform data in the earthquake data, determining the initial frequency of harmonic interference through the oscillation period of the original data and the maximum position of the amplitude spectrum; calculating the amplitude of the harmonic interference cosine function; and according to the earthquake data vector, the amplitude of harmonic interference cosine function, the harmonic interference cosine function vector and the target function derivative, the harmonic interference frequency amendment quantity and the time delay amendment quantity, adopting a frequency modifier formula to determine the harmonic interference frequency; and calculating the effective signal of earthquake. The method overcomes the disadvantage that the frequency domain suppresses the harmonic interference, and is quicker in speed than the time domain harmonic interference suppressing method, thereby improving the signal-to-noise ratio, and being capable of eliminating the harmonic interference in the earthquake data generated by high voltage transmission line and also eliminating the harmonic interference in the earthquake data generated by periodic vibration.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Energy-efficient electric power sending-out system
InactiveCN105552910AThe principle is simpleChange sizeHarmonic reduction arrangementAc network to reduce harmonics/ripplesElectricityLow voltage
The present invention discloses an energy-efficient electric power sending-out system. The energy-efficient electric power sending-out system comprises an electric supply; the electric supply is electrically connected with a rectifier; the rectifier is electrically connected with an inductive reactance choked flow device; the inductive reactance choked flow device includes a choke coil and a compensation coil, and the rectifier is electrically connected with the left end of the choke coil; the choke coil and the compensation coil respectively sleeve at the left and right ends of a coaxial iron core; the right end of the choke coil is electrically connected with the connection of the left end of the compensation coil and a boosting transformer; the boosting transformer is electrically connected with a high-voltage impedance simulator; the high-voltage impedance simulator is electrically connected with a step-down transformer; the step-down transformer is electrically connected with a low-voltage impedance simulator; the low-voltage impedance simulator is electrically connected with a filter; and the filter is electrically connected with a load. The principle of the system provided by the invention is simple, is able to effectively reduce and eliminate harmonic waves, has a better energy saving effect and effectively realizes energy conservation and emission reduction.
Owner:王长明
An effective method and circuit for realizing harmonic power conversion
ActiveCN106849083BIncrease powerReduce lossHarmonic reduction arrangementAc network to reduce harmonics/ripplesEffective powerCurrent electric
The invention discloses a circuit capable of realizing harmonic power conversion. The circuit comprises a resonance type harmonic current converter, wherein the input end of the resonance type harmonic current converter is connected with a power grid; in addition, the output end of the resonance type harmonic current converter is electrically connected with a user load. An LC high-power tuning method is used; the harmonic wave ingredients and the energy of the harmonic wave ingredients are independently extracted from the power grid; the effective power is output; the efficiency is highest; the loss is lowest; the principle is simplest; convenience and high speed are realized. The harmonic interference is eliminated; meanwhile, the harmonic power is changed from waste materials into valuable materials; the method belongs to novel application with the practical value in the field of current electric power energy saving fields.
Owner:上海睿源电子科技有限公司
A Fast Delayed Signal Destruction Filtering Method
ActiveCN112929024BEliminate target harmonicsShort filter timePulse automatic controlHarmonic reduction arrangementSignal cancellationElectric network
The invention discloses a fast time-delayed signal destructive filtering method, which divides the target harmonic into sub-harmonics with a certain frequency variation law; Triangulation eliminates this sub-harmonic; cascading different delay operators suppresses all target harmonics. The method can quickly eliminate target harmonics and accurately extract fundamental wave voltage components in the case of severe grid voltage distortion. Compared with the traditional delay cancellation method, this method has a shorter filtering time and has a stronger ability to filter out harmonics.
Owner:SHANDONG INST OF BUSINESS & TECH
Hybrid compensation filter cabinet
PendingCN108551172AEliminate Harmonic InterferenceEliminate harmonicsReactive power adjustment/elimination/compensationReactive power compensationActive power filterPower grid
The invention discloses a hybrid compensation filter cabinet in the field of reactive power compensation equipment of the power system. The hybrid compensation filter cabinet comprises a cabinet body.A dynamic filter reactive power compensation device and a static filter reactive power compensation device are arranged in the cabinet body; and each of the dynamic filter reactive power compensationdevice and the static filter reactive power compensation device consists of a controller, a change-over switch, a compensation capacitor bank, a fuse and a circuit breaker; and a current transformerand a voltage transformer are arranged between an external three-phase power grid and controllers of the dynamic filter reactive power compensation device and the static filter reactive power compensation device. Active power filters and the filter reactors are connected in series to the compensation capacitor banks of the dynamic filter reactive power compensation device and the static filter reactive power compensation device in sequence. Besides, a CPU processing module is arranged in the controller and includes a clock circuit and an energy storage module. The dynamic filter reactive powercompensation device and the static filter reactive power compensation device are connected in parallel with the external three-phase power grid. Therefore, harmonics in the power grid can be eliminated effectively; and the quality of the power grid is improved.
Owner:苏州中康电力开发有限公司
Method and system for eliminating harmonic interference in digital domain in 5G terminal based on nsa architecture
ActiveCN110661546BEliminate Harmonic InterferenceIncrease harmonic interferenceTransmissionFrequency spectrumCarrier signal
The invention provides a method and a system for eliminating a harmonic interference digital domain in a 5G terminal based on NSA architecture, and aims to solve the problem of self-interference caused by the same frequency of an LTE uplink harmonic signal and an NR downlink received signal in the 5G terminal under the NSA architecture when LTE and NR are in dual connection. The method for eliminating the harmonic interference digital domain in the 5G terminal based on the NSA architecture comprises two stages of digital domain interference elimination, wherein the first stage uses an extra feedback channel of the transmitting end to feed back a radio frequency signal of a transmitting link to the receiving end for self-interference elimination, and the second stage models a harmonic signal according to the broadband multi-carrier frequency domain harmonic model provided by the invention and performs interference elimination in the frequency domain. Harmonic self-interference generatedby high-power and large-bandwidth signals can be well eliminated so that the 5G terminal is enabled to work more stably when using the interference spectrum, and the spectrum utilization rate can beenhanced.
Owner:UNIV OF SCI & TECH BEIJING
Multifunctional harmonic wave optimizing intelligent controller and control method thereof
InactiveCN104092214AImprove reliabilityImprove power factorReactive power adjustment/elimination/compensationReactive power compensationElectricityCommunication unit
The invention relates to a multifunctional harmonic wave optimizing intelligent controller and a control method thereof. According to the controller, an electricity collecting unit receives voltage and current sampling signals of a pumping unit power supply and distribution system, the current sampling signals are output to an electricity measuring unit, and then the electricity measuring unit inputs measuring data into a diagnosis unit; the diagnosis unit and a harmonic wave optimizing unit are in communication connection through a communication unit; and the diagnosis unit inputs switching value signals through an input unit, and control signals are output to an external protection executing element through an output unit. According to the method, after a system is electrified, multitask threads are started; and each thread is subjected to function processing, and the threads comprise an electricity collecting task thread, a displaying task thread, a harmonic wave diagnosis thread, a switching value input and output management thread, a communication management thread, a protection processing thread and a shunt measuring protection control management thread. The controller and the control method are widely used in related industries, the reliability of power supply and distribution protection is effectively improved, harmonic interference is removed, power factors are improved, measuring is accurate, and equipment damage is lowered.
Owner:盘锦三和采油装备科技开发有限公司
Electricity saving device
ActiveCN102083267BEliminate Harmonic InterferenceTo achieve a regulated outputElectrical apparatusElectric lighting sourcesElectricityLoop control
Owner:BEIJING SINOBAIDE TECH
Electric control energy saving device for oil pump unit
InactiveCN1279691CNo no-load lossEliminate Harmonic InterferenceAC motor controlEnergy industryDIACResonance
Owner:郭士森 +1
A central air-conditioning fresh air unit control system for monitoring real-time energy consumption
ActiveCN106765941BReal-time monitoring of energy consumptionEliminate Harmonic InterferenceMechanical apparatusSpace heating and ventilation safety systemsFrequency changerControl system
The invention discloses a central air-conditioning fresh air unit control system for monitoring real-time energy consumption, which is characterized by comprising a frequency converter, a fresh air fan and a harmonic protector; The module includes a three-phase electricity meter, and the three-phase electricity meter is connected to the incoming line end of the main circuit. Compared with the prior art, the present invention can monitor the energy consumption of the fresh fan system in real time, which is beneficial to the energy saving of the system.
Owner:山东金洲科瑞节能科技有限公司
Automated testing system for testing bearing performance of automobile
PendingCN111089734AImplement automated testingHigh degree of automationVehicle testingMachine part testingTest efficiencyControl engineering
The invention relates to an automated testing system for testing bearing performance of an automobile. The automated testing system comprises a power supply, an upper computer, a motor driver and a motor, wherein the power supply is electrically connected with the upper computer, the motor driver and the motor separately; and the upper computer is electrically connected with the motor through themotor driver. According to the automated testing system, the upper computer issues system parameters and test tasks to the motor driver; and the motor driver drives the motor to run according to the system parameters and test tasks issued by the upper computer, thereby achieving automatic testing of the bearing performance. The automated testing system can meet the durability test conditions withhigher requirements; and compared with a traditional testing system for controlling a servo motor to test a bearing in a PLC pulsing mode, the automated testing system has the advantages that the testefficiency is greatly improved and the control accuracy on angles and torque is obviously improved.
Owner:PHASE MOTION CONTROL SOLUTION WUHAN CO LTD
Mems digital loudspeaker system and working method thereof
InactiveCN112261563ADirectionalSmall distortionMicrophonesLoudspeakersDigital signal processingEngineering
The invention discloses a mems digital loudspeaker system and a working method thereof. The mems digital loudspeaker system comprises a DSP unit, a switching circuit, a driving unit and a mems loudspeaker array unit, wherein the DSP unit is provided with a digital audio signal and analog audio signal input port and eight digital signal output ports; the switching circuit and driving unit is composed of eight independent driving units; and the mems loudspeaker array unit is composed of 255 array elements. By arranging the DSP unit, the eight driving units and the mems loudspeaker array, very strong directional sound is generated, sound distortion can be effectively reduced, the DSP has a digital signal processing algorithm for audio to eliminate harmonic interference, and each driving unitis internally provided with a corresponding matching circuit to adjust sound pressure, so that the sound distortion is reduced, and by virtue of the high directivity of the ultrasonic waves, a sound directional propagation process is realized.
Owner:常州元晶电子科技有限公司
Automatic test system for clutch performance test
PendingCN110926803AImplement automated testingHigh control precisionMachine part testingKinematic controllerElectric machine
The invention relates to an automatic test system for clutch performance test. The automatic test system comprises a power supply, an upper computer, a motion controller, a motor driver and a motor; and the power supply is electrically connected with the upper computer, the motion controller, the motor driver and the motor respectively, and the upper computer is electrically connected with the motor through the motion controller and the motor driver in sequence. The upper computer issues system parameters and a test task to the motion controller, and the motion controller generates an electronic cam curve according to the system parameters issued by the upper computer and sends a motion control instruction to the motor driver according to the test task issued by the upper computer; and themotor driver receives the motion control instruction of the motion controller, and is used for driving the motor to operate according to the motion control instruction, so the automatic test system realizes automatic testing of clutch performance and can meet durability testing conditions with higher requirements, and the automatic test system greatly improves the testing efficiency and obviouslyimproves the testing frequency and the control precision of the angle and the torque.
Owner:PHASE MOTION CONTROL SOLUTION WUHAN CO LTD
Grid voltage drop detection method and system based on fuzzy interval dynamic look-up table
InactiveCN109884383AIncrease speedImprove reliabilityFault locationMeasurement using digital techniquesVoltage amplitudePower grid
The invention discloses a grid voltage drop detection method based on a fuzzy interval dynamic look-up table. According to the method, a grid voltage state is tracked in real time, a grid voltage waveform is drawn, a fuzzy interval criterion table is generated at the same time, and a sample voltage amplitude is compared with a value of a position corresponding to the criterion table by using the dynamic look-up table to judge whether the grid voltage drops. The method specifically comprises the following steps: S1, performing real-time monitoring and synchronous uploading of a grid voltage signal; S2, collecting and storing the grid voltage signal; S3, performing adaptive tracking detection on the grid voltage; S4, generating a voltage drop fuzzy interval criterion table; and S5, using thedynamic look-up table to judge whether the grid voltage drops. The invention further discloses a grid voltage drop detection system based on the fuzzy interval dynamic look-up table. The grid voltagedrop detection method and system disclosed by the invention are small in calculated amount, easy to implement and high in judgment speed, and effectively solves the problems of large calculated amount, poor instantaneity, susceptibility to harmonic interference and low application value of the conventional voltage drop detection methods.
Owner:ANHUI ELECTRIC POWER FUYANG POWER SUPPLY +1
Multifunctional harmonic optimization intelligent controller and its control method
InactiveCN104092214BImprove reliabilityImprove power factorReactive power adjustment/elimination/compensationReactive power compensationElectricityCommunication unit
The invention relates to a multifunctional harmonic wave optimizing intelligent controller and a control method thereof. According to the controller, an electricity collecting unit receives voltage and current sampling signals of a pumping unit power supply and distribution system, the current sampling signals are output to an electricity measuring unit, and then the electricity measuring unit inputs measuring data into a diagnosis unit; the diagnosis unit and a harmonic wave optimizing unit are in communication connection through a communication unit; and the diagnosis unit inputs switching value signals through an input unit, and control signals are output to an external protection executing element through an output unit. According to the method, after a system is electrified, multitask threads are started; and each thread is subjected to function processing, and the threads comprise an electricity collecting task thread, a displaying task thread, a harmonic wave diagnosis thread, a switching value input and output management thread, a communication management thread, a protection processing thread and a shunt measuring protection control management thread. The controller and the control method are widely used in related industries, the reliability of power supply and distribution protection is effectively improved, harmonic interference is removed, power factors are improved, measuring is accurate, and equipment damage is lowered.
Owner:盘锦三和采油装备科技开发有限公司
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