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38results about How to "Achieving Synchronous Sampling" patented technology
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PCI interface protocol based array expandable data collection system realized by adopting FPGA (field programmable gate array)
InactiveCN103353725AIncrease flexibilityImprove confidentialityProgramme controlComputer controlData streamPci interface
The invention discloses a PCI interface protocol based array expandable data collection system realized by adopting an FPGA (field programmable gate array). The system comprises a plurality of identical analog signal collection boards. Each of the boards comprises a controller module, a multipath ADC module, a power supply module and a PCI bridging chip, wherein the controller module is composed of an FPGA chip and an SRAM chip, and used for controlling the sampling process, generating between-board bus signals and controlling caching and transmission of data; the multipath ADC module is composed of 64 paths of single-path ADC modules with the same structure, and used for converting analog signals into digital signals and transmitting the data to the controller module; the power supply module is composed of two identical power supply sub-modules, and used for providing stable and low-noise power for the chips; and the PCI bridging chip is used for realizing communication between the analog signal collection boards and an upper computer through a PCI bus. The PCI interface protocol based array expandable data collection system realizes sampling control of a multipath ADC and control of data flows by using the FPGA, and greatly increases the flexibility and the reliability of the design.
Owner:INST OF ACOUSTICS CHINESE ACAD OF SCI
Circuit for measuring synchronized sampler of flying capacitance
InactiveCN1967279AAchieving Synchronous SamplingEasy to debugCurrent/voltage measurementElectrical testingCapacitanceAudio power amplifier
This invention discloses a flying capacitance synchronous sampling and measurement circuit and method of measurement error correction, including synchronous sampling relay group, each of the two input terminal on a synchronous sampling relay connected to the nodes of a battery module. There is the same amount of AD converter relays fitted with synchronous sampling relay group. Each of the two input nodes of an AD converter is connected to each of the two output nodes of the corresponding synchronous sampling relay, paralleling a sampling maintain capacitance between the two input nodes. The two outputs of an AD conversion relay are connected to the input of a high input impedance differential operational amplifier. After proper evacuation, operational amplifier output signal is transmitted to AD converters. This invention achieves electrical isolated, multiple functional modules battery voltage synchronous sampling. Circuit is simple and high precision, facilitate the measurement channel expansion.
Owner:BEIHUA UNIV +1
Satellite ground micro-vibration test system
InactiveCN102798459AImprove anti-interference abilitySmall attenuationSubsonic/sonic/ultrasonic wave measurementUsing electrical meansAnti-aliasingSatellite
The invention discloses a satellite ground micro-vibration test system. The satellite ground micro-vibration test system comprises a high-sensitivity sensor used for extracting vibration signals near a disturbance source or a load, an anti-aliasing filter used for performing anti-aliasing filtering on the vibration signals extracted by the high-sensitivity sensor to form piezoelectric signals, a high-modulus conversion rate acquirer used for generating the piezoelectric signals into digital signals and a high-precision controller used for controlling display, storage and analysis of the digital signals. According to the invention, the high-sensitivity sensor realizes small-magnitude acquisition of the vibration signals, digital signals are generated through a high-precision data acquisition card after the vibration signals are subjected to the anti-aliasing filtering, and subsequent process is performed to provide efficient input for the subsequent satellite vibration reduction or vibration isolation and environmental test and also realize verification of vibration reduction or vibration isolation performance. Therefore, the satellite ground micro-vibration test system, disclosed by the invention, has the advantages of satisfying demands on acquisition and analysis of micro-vibration signals and being of great importance in improving control precision and stability of a satellite platform.
Owner:SHANGHAI SATELLITE ENG INST
Transformer bushing insulation state on-line monitoring system
InactiveCN102628919AAchieving Synchronous SamplingInfluence of measurement accuracyTesting circuitsConvertersTransformer
Provided is a transformer bushing insulation state on-line monitoring system. A PT signal conditioning module is connected to PT mutual inductors and a CT signal conditioning module is connected to CT mutual inductors. Three signal output channels of the PT signal conditioning module and three signal output channels of the CT signal conditioning module are connected to six signal input channels of an AD synchronous converter respectively. The signal output channels of the PT signal conditioning module are connected to a first signal input channel of a phase-locked loop module and a signal output channel of the phase-locked loop module is connected to a clock input channel. Data bus of the AD synchronous converter is connected to data bus of a master module and data bus of SRAM respectively, a channel control interface of the master module is connected to a channel control interface of the SRAM, and a signal output channel of the master module is connected to a second signal input channel of the phase-locked loop module. According to the invention, synchronous sampling of voltage and current is realized such that fundamental voltage measurement accuracy is not affected by frequency fluctuation of a grid system.
Owner:SHANGHAI JIAO TONG UNIV
Realization method of synchronous collection
ActiveCN102594356AAchieving Synchronous SamplingSimple methodAnalogue/digital conversionElectric signal transmission systemsInterface designData acquisition
The invention discloses a realization method of synchronous collection. The method can reach the goal of reducing the device cost, and comprises the following steps that: a computer and a low-sampling-speed instrument are connected, an interface design is carried out on the computer to obtain a synchronous collection software setting interface, the parameter setting is carried out on the interface, the time format of the set character strings is converted into time data using seconds as units, each channel is subjected to data collection, the collected data is stored into a two-dimension array, the digital quantity in the two-dimension array is converted according to the analog-to-digital conversion principle of an adopted analog-to-digital converter (ADC), in addition, a Y-axis sampling amplitude value of each channel before the synchronization is obtained, the actual sampling time of each Y-axis sampling amplitude value is calculated and is recorded as X-axis data, a polynomial curve fitting function is adopted for carrying out polynomial fitting on X-axis and Y-axis data by aiming at the synchronized channel, a fitting curve of the synchronized channel is obtained, each X-axis data of a reference channel is introduced into the fitting curve, and the alignment of the waveform of each channel is realized.
Owner:BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
Power battery high-precision data synchronous collecting and real-time processing system and method of power battery high-precision data synchronous collecting and real-time processing
ActiveCN107323291AAchieving Synchronous SamplingAccurate analysisVehicular energy storageBattery/fuel cell control arrangementPower batteryData acquisition
The invention discloses a power battery high-precision data synchronous collecting and real-time processing system and a method of power battery high-precision data synchronous collecting and real-time processing. The power battery high-precision data synchronous collecting and real-time processing system comprises a plurality of data collecting machine boxes. Each data collecting machine box comprises a monomer voltage collecting module, a monomer temperature collecting module and a data summarizing module. The number of the monomer voltage collecting module and the monomer temperature collecting module is in free combination. Collected corresponding data of a monomer battery is transmitted to the data summarizing module. The data summarizing module summarizes and caches all collected monomer battery data and uploads to an upper computer for storing. According to the power battery high-precision data synchronous collecting and real-time processing system, module design is adopted, the expandability is good, according to the needs, the number of sampling channels can be increased and decreased, the types of the sampling channels can be selected, and flexible system deploying is achieved.
Owner:SHANDONG UNIV
Combined electronic transformer
ActiveCN101707130AAchieving Synchronous SamplingLow manufacturing costBoards/switchyards circuit arrangementsTransformersDigital conversionHigh-pass filter
The invention relates to the field of intelligent transformer substation sampling, in particular to a combined electronic transformer, which comprises a main control unit, a voltage transformer, a current transformer, a power supply and an A / D (analogue-to-digital) conversion module, wherein the voltage transformer and the current transformer are connected with the A / D (analogue-to-digital) conversion module respectively; the inside of the main control unit is provided with a hardware simultaneous signal sampling module, a high pass filter (HPF), a digital integral module, and a digital signal output port; and the hardware simultaneous signal sampling module acquires the sampling values of each phase of current and voltage at the same time and performs analogue-to-digital conversion by the A / D (analogue-to-digital) conversion module. The combined electronic transformer has the advantages that: by combining the analogue quantities of the voltage, the current and the like in the same electronic transformer, the transformer realizes the synchronous sampling of digitalized sampling signals and reduces the manufacturing cost of a combined transformer.
Owner:深圳市联创知识产权服务中心
Coal mine power grid line impedance estimation system and working method thereof
ActiveCN104198816AHigh precisionFast precisionNon-electrical signal transmission systemsResistance/reactance/impedenceTopology informationPower grid
The invention provides a coal mine power grid line impedance estimation system. The coal mine power grid line impedance estimation system comprises a signal collecting device, a looped network access device, a network topology generating device, a data validity verification device and an impedance estimation device, wherein the signal collecting device is used for synchronously collecting and processing voltage and current signals of a coal mine power grid explosive-proof switch which is connected with the signal collecting device, the looped network access device is used for connecting the signal collecting device with the data validity verification device through an optical fiber Ethernet loop network, the network topology generating device is used for generating network topology information, the data validity verification device is used for performing synchronism and reasonability processing on collected data, and the impedance estimation device is used for estimating verified data by combination with the network topology information so as to figure out impedance of each line of a coal mine power grid. The working method mainly includes system synchronization timing, signal collection, validity judgment, impedance estimation and the like. By means of the coal mine power grid line impedance estimation system and the working method thereof, the credibility of estimation results of line impedance of the coal mine power grid can be improved, and scientific and reasonable supporting data can be provided for setting calculation of short-circuit protection in coal mine relay protection.
Owner:TIANDI CHANGZHOU AUTOMATION +1
Measuring device and method for measurement errors of electric measurement meter in frequency fluctuation process
ActiveCN103954924AAchieving Synchronous SamplingApplicable measurement errorElectrical measurementsElectricityMeasurement device
The invention relates to a measuring device and method for measurement errors of an electric measurement meter in the frequency fluctuation process. The measuring device for the measurement errors of the electric measurement meter in the frequency fluctuation process comprises a control system, a meter position of a meter to be measured, a power source, a standard meter, a frequency control unit and a frequency conversion unit. The measuring device is used for accurately measuring the measurement errors of the electric measurement meter when signal frequency fluctuates in a set mode, the frequency of voltage and current signals output by the device can fluctuate in the artificially set mode, and the standard meter of the device can achieve complete synchronous sampling under the signal conditions of frequency fluctuation. The invention provides a measuring method based on the measuring device, and the measuring method is used for measuring the measurement errors of the electric measurement meter in the fluctuation process of the voltage and current signals. The measuring device and method are suitable for measuring the measurement errors of the electric measurement meter in the fluctuation process of the voltage and current signals.
Owner:STATE GRID CORP OF CHINA +1
Fault indicator energy management method
ActiveCN106249107ASolving Energy Management ProblemsImprove accuracyFault location by conductor typesFault indicatorTime mark
The invention discloses a fault indicator energy management method, which comprises the steps of: installing three fault indicators on three-phase lines separately; calculating a relative time drift and an initial time drift between the fault indicator to be synchronized and the master synchronization fault indicator; optimizing transmission power of the fault indicator serving as a wireless data transmitter; and selecting the cluster head fault indicator which receives sampling information of the non-cluster-head fault indicators, carrying out time synchronization on time marks of sampling points, and judging whether a fault occurs by utilizing the synchronized sampling information of the non-cluster-head fault indicators, sampling information of the cluster head fault indicator and a fault judgment algorithm. The fault indicator energy management method improves the accuracy rate of fault judgment of the fault indicators, greatly reduces the communication power consumption of the fault indicators, solves the problem of high failure false alarm and missed alarm rate of an existing fault indicator, and greatly enhances the feeder automation level.
Owner:WUHAN ZHONGYUAN ELECTRONICS INFORMATION
Main switch shift adjustment controller of 400-V power distribution system and adjustment control method thereof
PendingCN107276094AHigh precisionAchieving Synchronous SamplingCurrent/voltage measurementAc networks with different sources same frequencyDistribution power systemControl cell
The invention relates to a main switch shift adjustment controller of a 400-V power distribution system and an adjustment control method thereof. The invention relates to main switch shift adjustment control of a 400-V power distribution system, especially to a dedicated device for solving problems of main switch over-load current fixed value setting and control problems on the condition of large load changing and an adjustment control method thereof. The controller comprises a current setting unit, a current acquisition unit, an alarm display unit, a switching control unit, and a central processing unit; and the central processing unit is connected with the current setting unit, the current acquisition unit, the alarm display unit, and the switching control unit. Under the circumstance that power of the system is not interrupted, primary current fixed-value setting of the main switch is carried out; and according to a relationship between a practically measured primary current and upper and lower limit thresholds, the switching control unit controls switching of the switch, so that a problem of setting of the main switch over-load current fixed value on the condition of large load change can be solved.
Owner:SUQIAN POWER SUPPLY COMPANY OF JIANGSU PROVINCE POWER +2
Power distribution terminal based on ColdFire architecture
InactiveCN103532235AAchieving Synchronous SamplingEasy to controlCircuit arrangementsSynchronising arrangementEmbedded systemNetwork automation
The invention discloses a power distribution terminal based on a ColdFire architecture. The power distribution terminal comprises a Coldfire processor, a three-remote functional module and a transceiver with a built-in high-precision IEEE (Institute of Electrical and Electronics Engineers) 1588 clock, wherein the Coldfire processor is connected with the three-remote functional module, and the Coldfire processor is connected with the transceiver. Circuit protection and network distribution three-remote functions are integrated in the power distribution terminal, the synchronous sampling and control on voltage and current in eight loops are realized, and intelligent power distribution and protection functions are realized. The power distribution terminal has the functions of a universal distribution network automation terminal. A high-precision synchronization function is realized through the adoption of the transceiver with the built-in high-precision IEEE 1588 clock.
Owner:KGE
Alternating-current parameter measuring device
ActiveCN103575992AAchieving Synchronous SamplingAccurate measurementVoltage-current phase angleMeasurement deviceAnalog to digital conversion
The invention discloses an alternating-current parameter measuring device which comprises a synchronization pulse generating circuit, a multi-channel filter compensation circuit, a phase forming detection circuit, a synchronization analog-to-digital conversion circuit and an MCU. The synchronization pulse generating circuit is connected with three-phase six-path input and output sampling voltages so as to obtain other detection synchronization pulses, the multi-channel filter compensation circuit is connected with multi-path three-phase voltages and currents so as to conduct filter compensation on input voltages and currents and then output the three-phase voltages and currents, the phase forming detection circuit is connected to the output end of the multi-channel filter compensation circuit to form the phase difference output of the three-phase voltages and currents, the synchronization analog-to-digital conversion circuit conducts synchronization analog-to-digital conversion on six-path phase difference signals and then obtains digital signal output of phase differences, and the MCU is connected with the synchronization analog-to-digital conversion circuit and processes the phase differences of the input digital signals to obtain the three-phase precise phase differences and in-phase current and voltage precise phase differences. According to the device, instantaneous and rapid synchronization sampling measurement on the three-phase current and voltage signals is achieved, and alternating-current parameters are precisely and effectively measured.
Owner:威立雅能源科技(上海)有限公司
A photocatalytic reactor
ActiveCN104492358BConducive to exploring the photocatalytic performanceEasy to controlWithdrawing sample devicesEnergy based chemical/physical/physico-chemical processesPhotocatalytic reactionControl system
The invention discloses a photocatalytic reactor. The photocatalytic reactor comprises a light source system, a reaction system, a sampling system and a control system and by the photocatalytic reactor, the functions of automatic and simultaneous sampling during the reaction process, synchronous reaction of multiple reactors, the control of reaction conditions and the like can be achieved. The photocatalytic reactor is characterized in that the light source of the light source system can be selected from ultraviolet light, visible light or natural light according to the experimental needs; the light source in the vertical direction produced by the light source system can be reflected by a light splitter and evenly divided into multiple horizontal lights to irradiate different reactors; the reaction system comprises multiple reactors which are same and mutually independent and is used for controlling the temperature of each reactor under the action of an external circulating fluid, each reactor is provided with a sampling switch and thus the manual sampling is achieved or the automatic sampling is achieved in combination with the sampling system. The device is simple in assembly and convenient to operate, the conditions of the photocatalytic reaction can be strictly controlled, the effects of different factors on the photocatalytic reaction are simultaneously explored and the photocatalytic reactor has application prospects in the field of photocatalytic researches.
Owner:FUJIAN NORMAL UNIV
Power grid voltage and current harmonic analysis method and system
InactiveCN110687350AAchieving Synchronous SamplingReduce leakageSpectral/fourier analysisConvertersFrequency spectrum
The invention discloses a power grid voltage and current harmonic analysis method and system. An AD converter samples an input voltage signal; a secondary virtual sampling unit is used for carrying out secondary sampling on first sampling data in a virtual sampling period s; a spectrum analysis unit analyzes the data by using an FFT algorithm to obtain the spectrum of the voltage signal; a spectrum leakage estimation unit scans and accumulates all spectral lines except the power frequency signals and harmonic waves thereof in the spectrum to obtain total energy leakage d of the spectrum; and avirtual sampling period adjustment unit adjusts the virtual sampling period s according to the spectrum leakage. According to the invention, a simple fixed hardware circuit is utilized to realize self adaption to frequency drift of the power frequency signals, so that the minimum spectrum leakage of an analysis result is ensured.
Owner:JIANGSU UNIV
Device for synchronously sampling condensable particles and sulfur trioxide in coal-fired flue gas and working method of device
PendingCN110849679AAchieving Synchronous SamplingEasy to analyzeWithdrawing sample devicesParticulatesFlue gas
The invention discloses a device for synchronously sampling condensable particles and sulfur trioxide in coal-fired flue gas and a working method of the device, and belongs to the field of industrialwaste gas purification environmental protection and energy. The invention aims to solve the problem that the existing equipment is difficult to effectively measure the actual condensable particle concentration of coal-fired flue gas discharged into the atmosphere and distinguish the main component sulfur trioxide of the coal-fired flue gas. According to the invention, the mixing process of the flue gas discharged into the atmosphere is simulated by controlling the temperature, pressure, humidity and other parameters of the flue gas and diluted air, and the condensable particles in the mixed gas is collected; meanwhile, the sulfur trioxide condensing devices are arranged in parallel, so the sampling of sulfur trioxide in the sampled flue gas is considered, and the condensable particles andsulfur trioxide are synchronously measured, so that the actual discharge condition of coal-fired flue gas pollutants can be analyzed, the accurate regulation and control are performed, and it is ensured that the discharge of the pollutants meets the discharge requirement.
Owner:HUADIAN ELECTRIC POWER SCI INST CO LTD
FPGA-based multi-channel analog signal synchronous sampling circuit system
PendingCN112600548AImprove real-time performanceMeet engineering useLogic circuit coupling/interface arrangementsDaughterboardEmbedded system
The utility model relates to an FPGA-based multi-channel analog signal synchronous sampling circuit system, which consists of a plurality of 32-channel signal acquisition daughter cards, a synchronoussignal acquisition card and an ATM network module, and is characterized in that the synchronous signal acquisition card sends clock synchronous signals to the 32-channel signal acquisition daughter cards through an RS422 bus; the synchronous signal acquisition card and the 32-channel signal acquisition daughter cards perform data exchange through a high-speed serial port RapidIO, and the whole system can perform data transmission with an external system through the ATM network module. According to the invention, each 32-channel signal acquisition daughter card can synchronously acquire 1-32 paths of front-end sensor analog signals, and eight 32-channel signal acquisition daughter cards can realize synchronous sampling of 256 paths of front-end sensor analog signals of the whole system under the control of the synchronous signal acquisition card. According to the invention, the FPGA is used as a core, the functions are designed in a modular manner, the flexibility is combined, the sampling precision is 16 bits, and engineering application can be realized in sonar, mechanical vibration analysis, engine testing and other occasions.
Owner:BEIJING MXTRONICS CORP +1
Synchronous sampling device for liquid drops and dust in smoke gas
InactiveCN102829997BAchieving Synchronous SamplingSmooth entryWithdrawing sample devicesGlass fiberParticulates
The invention relates to a synchronous sampling device for liquid drops and dust in smoke gas. According to the technical scheme, the outlet end of an impact tube (9) penetrates through an end portion in the vicinity of the big end of a liquid drop catcher housing (1); a sampling nozzle (10) is in threaded connection with the inlet end of the impact tube (9); a cover-like connecting piece (2) is fixed to the small end of the liquid drop catcher housing (1); the cover-like connecting piece (2) is in threaded connection with the inlet end of a particle catcher housing (3); a glass fiber filter cylinder (8) is arranged in the particle catcher housing (3); and the port of the small end of the liquid drop catcher housing (1) is located at the opening of the glass fiber filter cylinder (8). The outlet end of the particle catcher housing (3) is fixedly connected with the inlet end of a sampling pipe housing (5) through a left water stop pipe (4); a right water stop pipe (7) is fixed to the outlet end of the sampling pipe housing (5); and a water drain valve (6) is arranged at the lower part of the outlet end of the sampling pipe housing (5). The synchronous sampling device for liquid drops and dust in smoke gas is simple and compact in structure, convenient to mount and demount, good in operability, and capable of collecting liquid drops and dust in smoke gas simultaneously.
Owner:WUHAN UNIV OF SCI & TECH
General vibration signal measuring system of fan
ActiveCN102155984BReal-time and accurate reflection of vibration statusEliminate the problem of energy leakageVibration measurement in solidsSystems designMonitoring system
The invention discloses a general vibration signal measuring system of a fan, wherein the system realizes the variable frequency multi-channel synchronous sampling function for automatically tracking revolving speed based on phase signals. Site phase signals can be effectively identified and regulated by adopting two-way peak detection superimposing technique for phase signals, thereby improving the adaptability of field application of products. A general signal access circuit is designed to be a compatible circuit which is capable of enabling a plurality of vibration sensor signals of circuits to be compatible, realizing the synchronous, fast and high-precise sampling of signals, and being suitable for the state monitoring system design of large rotation machineries in various industrialsites. The A / D (analogue / digital) sampling frequency can be adjusted automatically according to the revolving speed by a CPLD (complex programmable logic device) logic control circuit; the single-board multi-channel synchronous sampling is realized, and multi-board card multi-channel synchronous sampling is also realized. The measuring system has the characteristics of strong generality, reliableperformance, high precision, simple configuration and the like.
Owner:BEIJING SIFANG JIBAO AUTOMATION
Line Impedance Estimation System and Working Method of Coal Mine Power Network
ActiveCN104198816BHigh precisionFast precisionNon-electrical signal transmission systemsResistance/reactance/impedenceTopology informationShort circuit protection
The invention provides a coal mine power grid line impedance estimation system. The coal mine power grid line impedance estimation system comprises a signal collecting device, a looped network access device, a network topology generating device, a data validity verification device and an impedance estimation device, wherein the signal collecting device is used for synchronously collecting and processing voltage and current signals of a coal mine power grid explosive-proof switch which is connected with the signal collecting device, the looped network access device is used for connecting the signal collecting device with the data validity verification device through an optical fiber Ethernet loop network, the network topology generating device is used for generating network topology information, the data validity verification device is used for performing synchronism and reasonability processing on collected data, and the impedance estimation device is used for estimating verified data by combination with the network topology information so as to figure out impedance of each line of a coal mine power grid. The working method mainly includes system synchronization timing, signal collection, validity judgment, impedance estimation and the like. By means of the coal mine power grid line impedance estimation system and the working method thereof, the credibility of estimation results of line impedance of the coal mine power grid can be improved, and scientific and reasonable supporting data can be provided for setting calculation of short-circuit protection in coal mine relay protection.
Owner:TIANDI CHANGZHOU AUTOMATION +1
Power battery high-precision data synchronous acquisition and real-time processing system and method
ActiveCN107323291BAchieving Synchronous SamplingAccurate analysisVehicular energy storageBattery/fuel cell control arrangementData acquisitionSystem configuration
The invention discloses a power battery high-precision data synchronous collecting and real-time processing system and a method of power battery high-precision data synchronous collecting and real-time processing. The power battery high-precision data synchronous collecting and real-time processing system comprises a plurality of data collecting machine boxes. Each data collecting machine box comprises a monomer voltage collecting module, a monomer temperature collecting module and a data summarizing module. The number of the monomer voltage collecting module and the monomer temperature collecting module is in free combination. Collected corresponding data of a monomer battery is transmitted to the data summarizing module. The data summarizing module summarizes and caches all collected monomer battery data and uploads to an upper computer for storing. According to the power battery high-precision data synchronous collecting and real-time processing system, module design is adopted, the expandability is good, according to the needs, the number of sampling channels can be increased and decreased, the types of the sampling channels can be selected, and flexible system deploying is achieved.
Owner:SHANDONG UNIV
A Broadband Synchronous Sampling Method
ActiveCN107576842BImprove search speedQuick search resultsMeasurement using digital techniquesFrequency spectrumBroadband
The invention discloses a broadband synchronous sampling method. The method includes: performing fixed-frequency sampling on signals at a fixed sampling rate, and performing discrete Fourier transformation on collected data to acquire a discrete spectrum sequence of the signals; finding a spectrum value corresponding to a point with maximum amplitude, using a spectrum zooming method with FFT+FT tozoom spectra around the maximum amplitude, and using a search algorithm through a golden section method plus a Newton method to search the spectrum around the spectrum value corresponding to the point with the maximum amplitude to find an extreme point, wherein frequency corresponding to the extreme point is signal fundamental frequency; controlling synchronous sampling of an ADC through the signal fundamental frequency.
Owner:惠州市成惠电子科技有限公司
Aeroengine Rotor Vibration Test System
ActiveCN107389337BAchieving Synchronous SamplingHigh precisionMachine gearing/transmission testingVibration amplitudeFundamental frequency
The invention discloses an aeroengine rotor vibration test system comprising a rotating speed sensor, a frequency signal isolator, a vibration sensor, a vibration tester and a signal record analyzer. The rotating speed sensor is used for measuring the rotating speed signal of an aeroengine rotor. The frequency signal isolator is used for shaping the rotating speed signal measured by the rotating speed sensor and outputting the isolated rotating speed signal. The vibration sensor is used for sensing the vibration charge signal of each vibration measuring point of the aeroengine. The vibration tester is used for converting the vibration charge signal sensed by the vibration sensor into a vibration voltage signal. The signal record analyzer is used for synchronously acquiring the rotating speed signal and the vibration voltage signal and extracting the rotor vibration fundamental frequency component of the vibration voltage signal and displaying the curve of the vibration amplitude of the rotor vibration fundamental frequency component changing along with the rotating speed and / or the time. The aeroengine rotor vibration test system is high in data analysis efficiency and high in the measured fundamental frequency component value accuracy.
Owner:AECC HUNAN AVIATION POWERPLANT RES INST
High-voltage electric energy metering device
PendingCN112557748AHigh measurement accuracyImprove error detection accuracyMeasurement using digital techniquesPhase currentsComputational physics
The invention provides a high-voltage electric energy metering device; standard signals are provided for detection signals of a three-phase voltage transformer and a three-phase current transformer byarranging a standard voltage transformer and a standard current transformer, and a ratio difference and an angular difference between the detection signals of the three-phase voltage transformer andthe three-phase current transformer and the standard signals are calculated, so that errors of the three-phase voltage transformer and the three-phase current transformer are obtained, and the measurement precision of the system is improved; a GPS receiving module is arranged to be used for synchronizing a first merging unit, a second merging unit, a first signal processing module and a second signal processing module, synchronous sampling of all channels is achieved, and the error detection precision is improved.
Owner:STATE GRID HUBEI MARKETING SERVICE CENT (MEASUREMENT CENT)
A power communication relay protection service delay control method, system and relay protection equipment
ActiveCN113541845BAccurate measurement of data transmission delayMeasuring Data Transfer LatencyTime-division multiplexLoop networksTelecommunicationsNetwork connection
The invention discloses a delay control method and system for power communication relay protection services and relay protection equipment. Each relay protection equipment is connected through a FlexE slice network formed by a plurality of FlexE switches to form a transmission ring network. The relay protection device and the FlexE switch perform clock synchronization; the relay protection device receives the sampling data message sent by the peer relay protection device through the FlexE slicing network, analyzes and obtains the sampling value and delay accumulation, and the delay accumulation time value is the time value on the transmission path The accumulation of the difference between the frame time stamps of the two adjacent communication parties is used as the total path delay from the opposite end to the relay protection device; the relay protection device obtains the sampling value synchronously collected with the opposite end according to the total path delay. The invention measures the total path delay of the FlexE slicing network between two relay protection devices, adjusts the sampling time accordingly, and ensures the synchronous measurement of the two relay protection devices.
Owner:INFORMATION & COMM BRANCH OF STATE GRID JIANGSU ELECTRIC POWER
On-Line Monitoring System of Surge Arrester Realizing Synchronous Sampling in rs485 Communication
ActiveCN109358256BRealize communicationAchieving Synchronous SamplingElectrical testingElectric digital data processingControl engineeringMonitoring system
The invention provides an online monitoring system for lightning arresters that realizes synchronous sampling in RS485 communication, including a host and multiple slaves. The slaves are used to monitor electrical signals on multiple lightning arresters respectively. Carry out analysis and calculation to obtain the relevant parameters of the arrester. The host computer and each slave computer are connected through the RS485 interface. The synchronous signal line between the machines is used for the master to control the sampling time of each slave to realize synchronous sampling, and the configuration of the communication baud rate when used as the RS485 communication connection line is opposite to the synchronous sampling when used as the RS485 synchronous signal line Controls have no effect. The system provided by the present invention not only realizes the communication between the master and the slave, but also realizes the synchronous sampling between the master and the slave by setting one RS485, and the synchronization accuracy is high.
Owner:SHANGHAI OUMIAO ELECTRIC INSPECTION CO LTD
A method for energy management of a fault indicator
ActiveCN106249107BSolving Energy Management ProblemsImprove accuracyFault location by conductor typesFault indicatorTime mark
Owner:WUHAN ZHONGYUAN ELECTRONICS INFORMATION
On-line data acquisition and analysis device of wind generating set
ActiveCN102102629BFully automatedReduce volumeWind motor controlMachines/enginesVibration accelerationData information
The invention provides a vibration and strain signal on-line data acquisition and analysis device of a wind generating set. The device consists of an eight-channel synchronous acquisition circuit and an advanced reduced instruction-set computer (RISC) machine (ARM) main control module, wherein the eight-channel synchronous acquisition circuit and the ARM main control module are communicated with each other through an RS485 interface, can be used for performing dynamic signal acquisition on signals output by a vibration acceleration sensor and a strain sensor of the wind generating set, extracting characteristic parameters of strain data and vibration data and automatically recognizing the running state of a machine according to the configuration information of the device and can be used for performing storage management on the operating data of the wind generating set according to a strategy preset by a configuration, so that the integrity of data information during the abnormal running of the wind generating set is ensured and the mechanical running state of the wind generating set can be automatically monitored and analyzed; simultaneously, the ARM main control module is used for performing data transmission through a network interface and an external monitoring computer. The device has a small size, can be directly arranged on the wind generating set and can effectively improve the running maintainability of the wind generating set.
Owner:SOUTHEAST UNIV
Mask-type breath sampler and breath test mask
ActiveCN113188853BSimple structureAchieving Synchronous SamplingWithdrawing sample devicesPreparing sample for investigationEnvironmental engineeringMechanical engineering
The present disclosure provides a mask-type respiration sampler and a respiration test mask. The mask-type respiration sampler includes a base and a first sampling device, a second sampling device and a third sampling device arranged in the base. The base includes a breather Air inlet and exhalation outlet, the inlet of the first sampling device is communicated with the exhalation inlet, and the first sampling device is used to collect the first exhaled sample; the inlet of the second sampling device is communicated with the outlet of the first sampling device, and the second sampling device The outlet of the device is communicated with the exhalation outlet, and the second sampling device is used to collect the second exhaled sample; the inlet of the third sampling device is communicated with the external environment, the outlet of the third sampling device is communicated with the exhalation outlet, and the third sampling device is used for It is used to collect gas samples from the external environment. The present disclosure can realize synchronous sampling of different samples, improve the accuracy of analyzing samples, the sampler has a simple structure, can realize sample enrichment in the sampling process of breath samples, and save sample preprocessing time.
Owner:RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
Photovoltaic panel inspection system and method based on simulated boundary scan
ActiveCN104410362BRealize electrical characteristic testAchieving Synchronous SamplingPhotovoltaic monitoringPhotovoltaic energy generationCurrent meterMultiplexer
Owner:BEIJING TSING YUN ENERGY TECH CO LTD
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