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50results about How to "Clock synchronization" patented technology
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Bluetooth audio hybrid communication method suitable for Bluetooth headset
InactiveCN108429949AReduce power consumptionPlay synchronouslyMicrophonesSignal processingComputer hardwareNetwork packet
The invention provides a Bluetooth audio hybrid communication method suitable for a Bluetooth headset. The method includes the following steps that: a slave headset monitors and receives an audio datapacket sent by smart equipment to a master headset, and when the slave headset receives the audio data packet from the smart equipment at a certain SLOT, the slave headset sends an ACK packet to themaster headset; and when the master headset receives the audio data packet sent by the smart equipment and receives the ACK packet sent by the slave headset, the master headset sends an ACK packet tothe smart equipment at the next SLOT, and otherwise, the master headset sends an NACK packet to the smart equipment. The smart equipment provided by the invention only needs to establish a Bluetooth connection with the master headset, and the slave headset only performs monitoring; and the master and slave headsets do not need to forward the audio data packet through Bluetooth, and thus the powerconsumption of the master headset can be reduced.
Owner:BESTECHNIC SHANGHAI CO LTD
Method and device for realizing boundary clock in cascade base station
InactiveCN102025480AAchieve synchronizationHigh precisionError prevention/detection by using return channelTime-division multiplexTimestampEmbedded system
The invention provides a method and device for realizing a boundary clock in a cascade base station, which is used for solving the problem that non-last stage base stations support a BC mode in a clock multicasting mode when the base stations are cascaded in a packet transport network (PTN) network. The method for realizing a boundary clock in a cascade base station comprises the following steps: receiving synchronous messages from a superior clock device; acquiring delay information from a superior clock device to the clock device in the synchronous messages, and determining the clock signal of the clock device in accordance with the delay information and the clock signal of the superior clock device; and sending messages carrying the timestamp of the clock device to a subordinate clock device. In addition, the invention also provides a device for realizing a boundary clock in the cascade base station.
Owner:ZTE CORP
Time synchronization method, device and system of xDSL
ActiveCN101783779ARealize time synchronizationClock synchronizationTelephonic communicationTime-division multiplexReal-time computingTime synchronization
The invention provides an xDSL time synchronization method, device and system. The method comprises the following steps: a far-end sends a first symbol, a local end receives the first symbol, the far-end obtains the time for sending the first symbol and the time for receiving the first symbol; the local end sends a second symbol, the far-end receives the second symbol, the far-end obtains the time for sending the second symbol and the time for receiving the second symbol, when calculating the clock offset of the far-end and the local end, the far-end splits the delay of path from the local end to the far-end and the delay of path from the far-end to the local end, obtains the value of the known part, and uses the condition that the downlink delay is approximately equal to the uplink delay or the downlink delay is proportional to the uplink delay to calculate the clock offset of the far-end and the local end, and the far-end uses the offset to adjust the clock and realize synchronization. The method of the invention can accurately obtain the clock offset of the far-end and the local end and effectively realize the time synchronization of the far-end and the local end by adjusting the read clock time of the far-end and the read clock time of the local end.
Owner:HUAWEI TECH CO LTD
Three-phase voltage phase distinguishing method
ActiveCN103063934AClock synchronizationPhase sequence/synchronism indicationElectricityDistribution transformer
The invention provides a three-phase voltage phase distinguishing method, wherein voltage collecting devices are installed on an A phrase, a B phrase, a C phrase at a head end of a power supply line on a low-voltage side of a distribution transformer, and electricity-tested places, sampling is conducted when voltages rise over a zero, the referenced moments when voltages of the A phrase, the B phrase and the C phrase rise over the zero are t1, t2 and t3, the referenced moment when a voltage of a phase distinguishing measurement point rises over the zero is ti, the number values of the moments which are over the zero are uploaded to a server and are compared, and when the ti is closest to one of the t1, the t2 or the t3, phrase of the phase distinguishing measurement point can be distinguished. Through the method, number of users and a three-phase power supply balance rate can be counted according to phrases, and a rate of electric energy loss can be counted in a split-phase mode.
Owner:STATE GRID CORP OF CHINA +4
Audio and video synchronous playing method and device, terminal and storage medium
ActiveCN110324689AImprove out-of-sync issuesImprove experienceSelective content distributionVideo playerComputer terminal
The invention discloses an audio and video synchronous playing method and device, a terminal and a storage medium, and belongs to the technical field of terminals. The method comprises the following steps: decoding and playing an audio clip through an installed audio player, and decoding and playing a video picture in a video clip through an installed video player; in the playing process, acquiring the current playing progress of the audio clip and the current playing progress of the video clip; and when the current playing progress of the audio clip is not synchronous with the current playingprogress of the video clip, adjusting the clock of the video player by taking the clock of the audio player as a reference clock, or adjusting the clock of the video player by taking the clock of thevideo player as the reference clock, so that synchronous playing of the audio clip and the video clip is realized. According to the invention, when the audio and the video are asynchronous, the clockof one player can be used as the reference clock to adjust the clock of the other player, so that the synchronous playing of the audio and the video is realized, and the user experience and the userviscosity are improved.
Owner:成都酷狗创业孵化器管理有限公司
Low-voltage transformer area acquisition equipment clock synchronization method based on HPLC carrier communication
ActiveCN111179570AClock synchronizationAchieve millisecond-level synchronizationElectric signal transmission systemsAcquisition apparatusTransformer
The embodiment of the invention discloses a low-voltage transformer area acquisition equipment clock synchronization method based on HPLC carrier communication, and particularly relates to the technical field of communication. The method comprises the following steps: (1) splitting calendar clocks of all acquisition equipment in a low-voltage transformer area into century second and millisecond units; (2) allowing a concentrator to accurately synchronize the clock of a CCO module; (3) allowing the CCO module to accurately synchronize the clock to a STA module; and (4), allowing the STA moduleto accurately synchronize the clocks of the various base tables. The invention discloses a clock synchronization method for the low-voltage transformer area acquisition equipment based on HPLC carriercommunication, the clock of the concentrator can be accurately synchronized to various levels of acquisition equipment such as a branch box monitoring unit, a meter box monitoring unit and an electric energy meter, the millisecond-level synchronization of all acquisition equipment clocks in the low-voltage transformer area is realized, and each stage of acquisition equipment acquires and freezespower grid parameters according to the own clock such that the curve data time deviation of each time point is far less than the curve data time deviation of an original acquisition system.
Owner:SHANGHAI HUIDIAN ELECTRIC POWER EQUIP ENG CO LTD
Clock synchronization method and cluster routing system
InactiveCN105991204AClock synchronizationImprove stabilityTime-division multiplexUser inputClock synchronization
A clock synchronization method provided by the present invention is applied to a cluster routing system, the cluster routing system comprises a main center frame router and two business frame routers, and the clock synchronization method comprises the following steps of using the main center frame router to set a clock source according to the configuration data inputted by users, wherein the clock source is the main center frame router or the business frame router; using the main center frame router to obtain the synchronous clock information preset in the clock source, wherein the synchronous clock information comprises the frequency synchronization information and the phase synchronization information; using the main center frame router to sent the synchronous clock information to the corresponding router according to the type of the clock source, so that the routers are in clock synchronization. The present invention also discloses the cluster routing system. According to the present invention, the working stability of the cluster routing system can be improved.
Owner:ZTE CORP
A passive optical network system for realization of TDM service based on Ethernet
ActiveCN1972160AReduce complexityImprove clock accuracyTime-division multiplexElectromagnetic transmissionBusiness dataReal-time computing
This invention provides one light network system without source based on Ethernet of TDM business, which comprises fiber branch connection light path terminal and light internet unit, wherein, the terminal and unit are set with TDM business adapter; the said terminal TDM business adapter adopts light network send clock to seal the TDM business data or analysis; the said light network unit TDM business adapter by use of light network receive clock for analysis or sealing.
Owner:广州市高科通信技术股份有限公司
Wireless Internet-of-Things-based override control obstacle avoidance intelligent vehicle and control method therefor
ActiveCN106959692AClock synchronizationSynchronous schedulingPosition/course control in two dimensionsVehiclesEngineeringObstacle avoidance
The invention discloses a wireless Internet-of-Things-based override control obstacle avoidance intelligent vehicle and a control method therefor and belongs to the field of wireless Internet-of-Things. A state sensing module, a wireless Internet-of-Things module, a regulation and control module and an override control module are mounted on the obstacle avoidance intelligent vehicle; the obstacle avoidance intelligent vehicle is suitable for traffic conditions of a crossroad, and the obstacle avoidance intelligent vehicle is allowed to cross the crossroad in a conflict-free manner. Particularly, special conditions can be handled with smooth speed change via the override control module, and effects of timely advancing, smooth deceleration, smooth acceleration and smooth parking can be exerted; clock synchronization and dispatching synchronization of the obstacle avoidance intelligent vehicle in the Internet-of-Things are fulfilled, signal lagging of traffic dispatching and time constants of a traffic system can be greatly reduced, and simplified and unified management of a traffic system model can be facilitated.
Owner:ZHEJIANG UNIV
Conversion device for connecting PTN equipment and FSO equipment
InactiveCN104038251ARealize interconnectionClock synchronizationData switching detailsLine-transmission detailsPhysical layerInterconnection
The invention relates to the technical field and discloses a conversion device for connecting PTN (Packet Transport Network) equipment and FSO (Free Space Optical) equipment in an embodiment. The conversion device comprises a GE (Gigabit Ethernet) optical interface module, an FSO nonstandard optical interface module, a first physical layer chip, a second physical layer chip and a signal processing module, wherein the GE optical interface module is connected with the first physical layer chip, the first physical layer chip is connected with the signal processing module, the signal processing module is connected with the second physical layer chip, the second physical layer chip is connected with the FSO nonstandard optical interface module, the GE optical interface module is used for connecting the PTN equipment, while the FSO nonstandard optical interface module is used for connecting the FSO equipment. The conversion device for connecting the PTN equipment and the FSO equipment is capable of connecting the PTN equipment with the FSO equipment used by an operator at present, realizing interconnection with the PTN equipment under the condition of no optical fiber, and keeping clock synchronization in the whole transmission network.
Owner:深圳市新岸通讯技术有限公司
Device for realizing fixed forwarding delay of V.24 interface multiplexer
InactiveCN101834683AClock synchronizationReduce delay compensation errorTime-division multiplexControl delayClock generator
The invention provides a device for realizing the fixed forwarding delay of a V.24 interface multiplexer. The device comprises a phase lock loop (PLL) frequency doubling / dividing module, an edge / code pattern capturing module, a counter / clock generator module 1, a V.24 / E1 multiplexing module, an E1 interface module for NRZ code / HDB3 code conversion, an E1 interface module for HDB3 code / NRZ code conversion, an E1 clock / frame synchronization recovering module, an E1 / V.24 de-multiplexing module and a counter / clock generator module 2. The device controls delay jitter in transmission from V.24 to E1 to be within 1 mu S by cooperative work among the modules to effectively reduce an end-to-end delay compensation error and realize intranet clock synchronization.
Owner:珠海市佳讯实业有限公司
Method for measuring temperature of conductor in strong alternating electromagnetic field
InactiveCN101750161AIncrease profitClock synchronizationEnergy efficient ICTThermometers using electric/magnetic elementsArea networkElectromagnetic field
The present invention relates to a method for measuring temperature of a conductor in a strong alternating electromagnetic field based on a CAN (controller area network) bus double-layer network structure. The requirements of temperature measuring and data transmitting devices for power consumption, high voltage insolation, unlimited volume of monitoring equipment, simple and reliable installation mode, etc have to be met when the temperature of high voltage distribution equipment rises. The structure comprises three physical modules of low power consumption and two communication protocols. The physical modules are a radio temperature measuring sensor, a radio receiving master station and a monitoring center. The communication protocols are CAN and ZigBee. A multi-host and multi-slave tree-shaped double-layer network structure is accordingly formed from the content above. The first layer is a CAN bus type daisy chain configuration formed by the monitoring center and the host nodes of the second layer, which are connected by wires. Data is transmitted by CAN protocol. The second layer is a star configuration consisting of host nodes and slave nodes of the layer. The nodes are in radio connection, and data is transmitted by ZigBee protocol. The present invention is used for measuring temperature of a conductor in a strong alternating electromagnetic field.
Owner:黑龙江乾丰科技发展有限公司 +1
Intelligent wiring device for online test of gateway electric energy metering device
InactiveCN108132453AUpgrade functionRealize data interactionElectrical measurementsOnline testMultiple point
The invention provides an intelligent wiring device and examination method for online test of a gateway electric energy metering device, and solves the problems that frequent opening (closing) of contacts of a conjunction box in a present gateway electric energy metering device causes no-voltage and shunting faults and influences the gateway metering accuracy, and manual test via multiple devicesin multiple points causes high workload, low efficiency and high safety risk.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
Electric six-axis robot control system and control method based on TherCAT
PendingCN114248269ARealize data transmissionClock synchronizationProgramme-controlled manipulatorKinematic controllerControl engineering
The invention discloses an electric six-axis robot control system based on EtherCAT, and the system is characterized in that the system comprises a PC and a PLC master control system, the PC and the PLC system carry out data interaction through an ADS protocol, the PLC master control system comprises a PLC master station and a plurality of PLC slave stations, the PLC master station and the plurality of PLC slave stations carry out data interaction through the EtherCAT, and the PLC master station and the plurality of PLC slave stations are connected with the PLC master station. The PLC master station and the PLC slave station perform data interaction with the PC based on an ADS protocol; and the PLC slave station comprises a motion controller and a logic controller which respectively correspond to the joints of the six-axis robot. Data transmission between the PLC master station and the PLC slave station is realized by adopting an EtherCAT communication mode, and the data compatibility is good. A six-axis robot joint injection variable error analysis algorithm provides data reference for installation and debugging of robot joints and opening of a control algorithm. And the TwinCAT is used as a main control core, and a distributed clock technology is adopted to ensure clock synchronization among the EtherCAT slave station modules.
Owner:国网浙江省电力有限公司海宁市供电公司
Clock processing method, access network equipment and terminal equipment
ActiveCN108667543AEfficient use ofHigh precisionSynchronisation arrangementUser identity/authority verificationTimestampAccess network
The embodiment of the invention provides a clock processing method, access network equipment and terminal equipment. The method comprises the following steps: determining a first timestamp when the terminal equipment sends a first signal; receiving a second signal which is sent by the terminal equipment and corresponds to the first signal, and determining a fourth timestamp when the second signalis received; and sending a data packet containing the first timestamp and the fourth timestamp to the terminal equipment, wherein the data packet is used for enabling the terminal equipment to adjusta local clock of the terminal equipment. The first timestamp and the fourth timestamp are sent to the terminal equipment at one time in a merged way, so that utilization rate of time frequency resource is improved, then the time frequency resource of a wireless network is more efficiently utilized, and clock synchronization is realized.
Owner:HUAWEI TECH CO LTD
Automatic on-the-fly positron emission tomography (PET) scan planning and optimization
PendingCN111566745AUniform Image QualityImprove image qualityReconstruction from projectionTomographyCounting rateReconstruction method
A non-transitory computer-readable medium stores instructions readable and executable by a workstation (18) including at least one electronic processor (20) to perform an acquisition and reconstruction method (30, 32). The method includes: acquiring emission imaging data using an emission image acquisition device (12) wherein the acquiring is scheduled to be performed over an acquisition time; during the acquiring, measuring a count or count rate of the acquired emission imaging data; during the acquiring, adjusting the acquisition time based on the measured count or count rate to generate anadjusted acquisition time; stopping the acquiring at the adjusted acquisition time; and reconstructing the emission imaging data acquired over the adjusted acquisition time to generate one or more reconstructed images.
Owner:KONINKLJIJKE PHILIPS NV
Clock synchronization method and system based on HPLC communication network delay correction
ActiveCN113630157AClock synchronizationCurve data time deviation is smallElectric signal transmission systemsPower distribution line transmissionTime deviationAcquisition apparatus
The invention discloses a clock synchronization method and system based on HPLC (High Performance Liquid Chromatography) communication network delay correction. The method comprises the following steps: a CCO requests a clock from a concentrator; the CCO module accurately synchronizes a clock to the STA module; an STA module obtains local clocks from various base meters; and the STA makes a corresponding timing strategy according to the comparison between the clock of the STA and the clock of the base table. According to the acquisition system clock synchronization method and system based on the HPLC carrier communication network, the clock of the concentrator can be accurately synchronized to a branch box monitoring unit, a meter box monitoring unit, an electric energy meter and other levels of acquisition equipment, microsecond-level synchronization of all acquisition equipment clocks in a low-voltage transformer area is realized, and each level of acquisition equipment acquires and freezes power grid parameters according to the own clock, so that the time deviation of the curve data of each time point is far less than the time deviation of the curve data of an original acquisition system.
Owner:国网四川省电力公司营销服务中心
Clock synchronization device for positioning base station and synchronization method thereof
PendingCN107659369ALow costSimple structureTime-division multiplexWireless communicationComputer scienceGps positioning
The invention relates to a clock synchronization device for a positioning base station and a synchronization method thereof. The clock synchronization device for the positioning base station comprisesa GPS unit used for positioning and outputting a first clock signal; a processing unit used for receiving the first clock signal and outputting a second clock signal, wherein the first clock signal is synchronized with the GPS unit; and a positioning unit used for receiving the second clock signal, wherein the second clock signal is in clock synchronization with the positioning unit. The clock synchronization device for the positioning base station provided by the invention realizes the clock synchronization of the GPS unit and the positioning unit; if the clock precision is the same, then the clock of each positioning unit of the positioning base station is synchronous, and the clock synchronization device does not need to depend on a GPS positioning clock to keep the clock of the positioning base station to be synchronous like the prior art, and an expensive PLL clock is not needed to be used to generate / distribute chips, so that the cost is greatly reduced; and besides, the structure is simple and the positioning is accurate.
Owner:丰翼科技(深圳)有限公司
Ethercat bus master station and slave station real-time synchronization method
PendingCN114500154ARealize real-time synchronous controlClock synchronizationTime-division multiplexBus networksEmbedded systemCarrier signal
The invention discloses an Ethercat bus master station and slave station real-time synchronization method, which comprises the following steps: setting a carrier period and a master station synchronization period, the ratio of the carrier period to the master station synchronization period being an integer N; when the synchronous interrupt program of the MCU slave station is finished, the SyncIO is set to be at a high level, and the SyncIO is an IO port, connected with the FPGA execution module, on the MCU slave station; when the sum of the times of triggering a second event and a fourth event is N, SyncIO is set to be low level, then the sum of the times of triggering the second event and the fourth event is reset, the second event is a sampling interruption triggering event, and the fourth event is a sampling interruption triggering event; and the state of the SyncIO is detected in real time, and when the rising edge of the SyncIO is detected, the FPGA execution module executes a synchronization algorithm. According to the invention, real-time synchronous control of the Ethercat master station, the MCU slave station and the FPGA execution module is realized.
Owner:成都中天自动化控制技术有限公司
Slot wave seismograph, and underground clock calibration and time synchronization method thereof
ActiveCN111487683AClock synchronizationClock Calibration SynchronizationSynchronous motors for clocksSeismic signal receiversTelecommunicationsSeismometer
The invention discloses a slot wave seismograph, and an underground clock calibration and time synchronization method thereof and belongs to the technical field of geophysical exploration. An acquisition system and a triggering system are included, wherein the acquisition system includes an acquisition host and a plurality of acquisition stations, the trigger system includes a trigger recorder andan exploder, the acquisition host is connected with an underground explosion-proof notebook computer, the acquisition stations are connected with one another through large wires and sensors, the acquisition host is connected with the trigger recorder through a cable, and the trigger recorder is connected with the exploder; and the acquisition host records acquired seismic waveform data, the trigger recorder records detonator detonation time, and the acquisition host communicates with the trigger recorder through the cable to complete clock calibration and clock synchronization.
Owner:HEFEI GUOWEI ELECTRONICS +1
Timing device, base station, positioning system, calibration method and positioning method
ActiveCN112654082AHigh precisionHigh positioning accuracySynchronisation arrangementGenerating/distributing signalsEmbedded systemAtomic clock
The invention provides a timing device, a base station, a positioning system, a calibration method and a positioning method. The timing device comprises a processor and an ultra wide band UWB chip which are in communication connection. The UWB chip comprises a UWB clock, and the UWB clock crosses zero once every first preset time length; the processor comprises a timer, carries out zero-crossing detection on the UWB clock according to a second preset duration by the processor, and records the zero-crossing times of the UWB clock; the processor is used for obtaining the current time of the UWB chip, and obtaining the system time according to the current time, the zero-crossing frequency and the duration corresponding to each zero-crossing. According to the timing device provided by the embodiment of the invention, the precision of the timing device can be greatly improved, and in addition, the clock device can provide picosecond-level timing with atomic clock-like precision for a time-based positioning system. Based on the timing device, the invention provides a base station, a positioning system, a calibration method and a positioning method for realizing millimeter-scale positioning.
Owner:GUANGDONG BOZHILIN ROBOT CO LTD
Clock processing device and method for OTN branch board card
ActiveCN107579796AImprove experienceMeet the TIE index requirementsTime-division multiplexData switching networksProcess moduleSwitching signal
The invention discloses a clock processing device and a clock processing method for an OTN branch board card, and relates to the technical field of optical communication application. A Framer chip ofthe device comprises an SFP module and an 8K clock processing module connected with the SFP module. The 8K clock processing module can extract a clock from a client business end specified by the userto a clock unit of the system, and monitors a client business port in real time when the OTN branch board card is used as a clock source; once a fault alarm is monitored, an interruption level signalis output to an FPGA processing module, and meanwhile a clock source switching signal is sent to the clock unit of the system. After the FPGA processing module of the device receives the interruptionlevel signal, a clock extraction channel is closed, and after the clock unit of the system receives the clock source switching signal, the clock source is switched. According to the device and the method provided by the invention, the clock source can be timely switched when the clock source is failed or lost, and a response can be made within 1ms, and thus the TIE index requirement of the systemis met, and user experience is good.
Owner:FENGHUO COMM SCI & TECH CO LTD
Clock regulating method between playing devices, apparatus and system thereof
InactiveCN106448711AClock synchronizationStereo listening experience is goodRecord information storageSignal processing using self-clocking codesComputer moduleSystem time
The invention provides a clock regulating method between playing devices, an apparatus and a system thereof. The method comprises the following steps of receiving a clock adjustment instruction emitted by a second playing device, wherein the clock adjustment instruction carries correction time; determining whether current system time of a first playing device is consistent with the correction time; and if the current system time is inconsistent with the correction time, according to the clock adjustment instruction, setting the current system time of the first playing device to be the correction time so that clocks between the first playing device and the second playing device are synchronized. The playing devices in the invention carry out communication adjusting through built-in sending and receiving modules so that clock synchronization between the first playing device and the second playing device is guaranteed and a basic parameter is provided for sound synchronization. The method, the apparatus and the system are not influenced by network equipment, a network bandwidth and a network environment. A problem that a stereo sound field is leaning and drifting because of network adjusting is effectively avoided. And a good stereo audition feeling is brought for a user.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Smart Substation Equipment Synchronization Detection System
ActiveCN104280641BGuaranteed use effectGuaranteed reliabilityElectrical testingSatellite transmitterCommunication unit
Owner:STATE GRID CORP OF CHINA +1
A control method for communication of nodes in self-organized Ad hoc network of cellular mobile node
InactiveCN101267578BClock synchronizationSolve congestionNetwork topologiesData switching networksTransceiverFrequency spectrum
The invention discloses a communication control method using nodes in cellular mobile node self-organizing Ad Hoc network of the radio technology, which is characterized by comprising steps of: i, mounting a first transceiver and a second transceiver on the nodes; ii, finding a current usable channel set by a base station, and broadcasting the current usable channel set to the nodes in the network; iii, scanning the current usable channel set by the second transceiver, selecting a group of candidate home channels from the channel set, and randomly selecting one channel as the elected home channel; iv, the node broadcasting the elected home channel to the adjacent nodes on a common control channel via the first transceiver, and monitoring return signals on the network; v, a sending node tuning the second transceiver onto the elected home channel of a receiving node, and accessing the channel in a CSMA / CA manner to perform data transmission. With the invention, the frequency spectrum resource can be effectively used, the data transmission is distributed on a plurality of channels thereby reducing service interaction.
Owner:HUAZHONG UNIV OF SCI & TECH
Voltage and current split type electric energy quality measuring device and method for intelligent substation
PendingCN111650465ASolve the problem of incomplete measurement indicatorsClock synchronizationElectrical testingSmart substationCurrent electric
The invention discloses a voltage and current split type electric energy quality measuring device and method for an intelligent substation. Voltage and current electric energy quality indexes can be simultaneously measured, measurement signals are respectively taken from analog voltage and current signals at the front end of a merging unit, electric energy quality indexes such as harmonic waves and the like are accurately obtained, and the problems that a digital electric energy quality measurement device cannot measure higher harmonic waves and measurement indexes in a traditional analog signal measurement method are incomplete are solved. A voltage measurement module and a current measurement module are independently arranged. The voltage measurement module and the current measurement module are respectively provided with a plurality of voltage signal measurement channels and current signal measurement channels. The voltage measurement module and the current measurement module are electrically connected with a high-precision clock wireless synchronization module, the voltage signal measurement channels and the current signal measurement channels are electrically connected with avoltage measurement screen and a current measurement screen respectively, and the voltage measurement screen and the current measurement screen are electrically connected with a merging unit.
Owner:ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
Hybrid Network Clock Synchronization System
ActiveCN106160905BLow costReduce interconnect signalTime-division multiplexTransmissionHybrid typeCommunication interface
The invention relates to a hybrid network clock synchronizing system and method thereof. The system comprises a main communication controller, a plurality of slave communication controllers and a plurality of radio stations, each of the main communication controller and the slave communication controllers comprises a main control module for synchronizing an internal clock, a backboard provided with a communication interface and a radio station adapting module connected with the main control module through the communication interface and a plurality of wired remote transmission modules, the clock synchronization between the main control modules in the main communication controller and the slave communication controllers and the radio station adapting modules and the plurality of wire remote transmission modules is realized through only one bidirectional hardware signal. Compared with the prior art, the system and method disclosed by the invention have the advantages as follows: the hardware cost is lowered, and interconnected signals are reduced.
Owner:上海航天智能装备有限公司
A wireless Internet of Things-based intelligent car with overriding control and obstacle avoidance and its control method
ActiveCN106959692BClock synchronizationSynchronous schedulingPosition/course control in two dimensionsVehiclesEngineeringObstacle avoidance
The invention discloses an overriding control obstacle avoidance smart car based on the wireless Internet of Things and a control method thereof, which belongs to the field of the wireless Internet of Things. The obstacle avoidance smart car is equipped with a status sensing module, a wireless Internet of Things module, and a control module. , override control module; suitable for traffic conditions at intersections, allowing obstacle avoidance smart vehicles to pass through intersections without conflict. In particular, the override control module can handle special situations with gentle speed changes to achieve the effects of timely travel, smooth deceleration, smooth acceleration, and smooth parking; the clock synchronization and scheduling synchronization of obstacle avoidance smart vehicles in the wireless Internet of Things network can significantly reduce It solves the signal lag of traffic control and the time constant of the traffic system, which is helpful for the simplification and unified management of the traffic system model.
Owner:ZHEJIANG UNIV
Synchronous detection system for intelligent transformer substation device
ActiveCN104280641AGuaranteed use effectGuaranteed reliabilityElectrical testingCommunication unitSmart substation
The invention specifically provides a synchronous detection system for an intelligent transformer substation device. The problem that an existing transformer substation device is large in labor intensity, low in effect and free of detection result reliability is solved. The synchronous detection system for the intelligent transformer substation device comprises a satellite signal receiving device, a satellite signal demodulation unit, a clock synchronization adjustment device, an operation parameter acquisition device, a wireless communication unit, a detected device and a control room mainframe. The transmitting end of the satellite signal receiving device is connected with the receiving end of the satellite signal demodulation unit, the transmitting end of the satellite signal demodulation unit is connected with the receiving end of the clock synchronization adjustment device, the clock synchronization adjustment device is connected with the detected device, the output end of the detected device is connected with the input end of the operation parameter acquisition device, the output end of the operation parameter acquisition device is connected with the input end of the wireless communication unit, and the output end of the wireless communication unit is connected with the input end of the control room mainframe. The synchronous detection system for the intelligent transformer substation device ensures that a detection result is accurate and reliable.
Owner:STATE GRID CORP OF CHINA +1
Base station synchronization method
PendingCN114466445AClock synchronizationSynchronisation arrangementTime-division multiplexEngineeringClock synchronisation
The invention relates to the technical field of communication, and provides a base station synchronization method, a plurality of base stations share one fixed time service source, the time service level of the fixed time service source is 1, each base station is provided with an original time service level and a current time service level, the original time service level is unique, and the current time service level is unique. The initial value of the original time service level is equal to the initial value of the current time service level; when a fixed time service source works normally, base station synchronization is carried out according to the following method: when a first base station receives a data packet sent by the fixed time service source, clock synchronization of the first base station and the fixed time service source is executed, and the current time service level of the first base station is 2; the first base station is any base station in a plurality of base stations. Through the technical scheme, the problem of poor synchronization effect of the base station synchronization method in the prior art is solved.
Owner:河北高达智能装备股份有限公司
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