71 results about "Time transfer" patented technology

The invention discloses a power distribution area line loss regulation and control method and system based on light storage cooperation and multi-time scale optimization. Comprising the following steps: data acquisition: acquiring photovoltaic output, energy storage SOC, node voltage and line current data in real time; prediction calculation: predicting photovoltaic and load, and generating regulation and control boundary conditions; optimization decision making: running day-ahead optimization regulation and control and intra-day multi-time scale regulation and control strategies, and generating a regulation and control instruction; and performing control: realizing rapid power adjustment through an energy storage converter and a photovoltaic inverter. A multi-factor coupling line loss model is established, an improved particle swarm algorithm is designed to solve an optical storage scheduling strategy, and data driving and a physical mechanism model are fused to improve prediction precision. And a second-minute-hour collaborative optimization architecture is further constructed, so that rapid voltage stabilization and energy space-time transfer are realized. The method can effectively reduce the line loss rate of the transformer area, and is suitable for the energy-saving and loss-reducing scene of the power distribution network with high-proportion new energy access.

The invention discloses a full-performance detection method and system based on a big data technology, and relates to the technical field of equipment performance detection.The full-performance detection method comprises the steps that multi-dimensional performance data of equipment is collected, the multi-dimensional performance data is preprocessed, and a full-performance detection result is obtained based on the time-space characteristics of the preprocessed multi-dimensional performance data; the method comprises the following steps: carrying out dynamic weighted fusion to generate a unified input signal, constructing a space-time transfer model according to the input signal and historical state data of equipment, predicting the state of the equipment, calculating an abnormal score of the equipment by comparing the difference between the predicted state and real-time measurement data, and calculating the dynamic weight of the equipment based on the abnormal score and the multi-dimensional performance data. And generating a comprehensive performance score of the equipment, and matching the equipment maintenance priority suggestions. According to the invention, the comprehensiveness, the accuracy, the timeliness and the robustness of equipment performance detection are improved, the intelligence and the pertinence of equipment maintenance are realized, the equipment management level is effectively improved, the maintenance cost is reduced, and the service life of the equipment is prolonged.

The application discloses a kind of trusted time transfer device and method, it is related to trusted time transfer technical field, including network management system and trusted time transfer equipment;Network management system is used for equipment identity solidification and authentication and equipment operating state real-time monitoring;Trusted time transfer equipment is based on trusted time signal reception relay module, equipment identity authentication pre-solidification mechanism, two-way certificate verification and transmission encryption mechanism, equipment failure stop signal transmission mechanism and the traceability and proof mechanism of time signal, real-time measurement is carried out to trusted time signal, time delay compensation, signal amplification processing is transferred out;The application ensures that itself is not replaced by strict control mechanism;On signal processing, the controllability of time real-time detection and time delay compensation is realized;In addition, it also provides a feasible path for the traceability verification and credibility proof of time signal with time relay function.

The invention discloses a trusted time transmission device and method, and relates to the technical field of trusted time transmission, and the device comprises a network management system and trusted time transmission equipment; the network management system is used for equipment identity solidification and authentication and equipment operation state real-time monitoring; the trusted time transmission device performs real-time measurement, time delay compensation and signal amplification processing on a trusted time signal based on a trusted time signal receiving relay module, a device identity authentication pre-curing mechanism, a bidirectional certificate verification and transmission encryption mechanism, a device fault stop signal transmission mechanism and a time signal traceability and proving mechanism, and then transmits the trusted time signal; it is ensured that the device is not replaced through a strict control mechanism; in the aspect of signal processing, the controllability of time real-time detection and time delay compensation is realized; in addition, the time relay function is achieved, and a feasible path is provided for traceability verification and credibility proof of time signals.

A system, comprising: transmitter (Tx); first receiver; second receiver. Wherein, method of synchronisation comprises: at first receiver (Rx1): receiving Co-ordinated Universal Time (UTC) signal (from

The application discloses a continuous time transfer method for compensating inter-satellite narrow-lane ambiguity, and is applied to the field of GNSS time transfer, and comprises the following steps: modifying original observation equations to obtain modified observation equations; fixing ambiguities in the modified observation equations, and calculating receiver clock differences of reference stations and reference stations for multiple days based on the modified observation equations after fixing the ambiguities; the ambiguities comprise narrow-lane ambiguities and wide-lane ambiguities; differentiating the receiver clock differences of the reference stations and the reference stations for multiple days to obtain time transfer results; calculating cross-day jump amplitudes according to the time transfer results, and converting the cross-day jump amplitudes into narrow-lane perimeters; compensating inter-satellite narrow-lane ambiguities in the process of fixing the narrow-lane ambiguities by using the narrow-lane perimeters, and returning to perform the step of modifying the original observation equations; and on the basis of fixing the ambiguities and improving time transfer stability, the cross-day jump phenomenon inherent in a post-carrier phase processing mode can be eliminated, and continuous time transfer is realized.

The present invention relates to a secure time transfer system and method based on bidirectional quantum key distribution. The transfer system may include a transmission channel between a communication terminal A and a communication terminal B, wherein communication terminals A and B may send single-photon signals to each other according to a quantum key distribution protocol and respectively detect the arriving single-photon signals; communication terminal A records the emission time t of the single-photon signal based on a local clock A. SA and arrival time t RA , the communication terminal B records the emission time t of the single photon signal based on the local clock B SB and arrival time t RB ; The communication terminal A also encrypts the transmission time t SA and arrival time t RA Transmitted to communication terminal B; communication terminal B according to the transmission time t SA Arrival time t RA , launch time t SB , and arrival time t RB Calculate the clock difference T between clocks A and B AB ; and, according to the clock error T AB Clock B is adjusted to compensate for the clock difference between clocks B and A, thereby achieving time transfer.

The application discloses a link time delay calibration result uncertainty modeling evaluation method and device and a medium, and relates to the technical field of satellite navigation high-precision timing. The method comprises the following steps: selecting a time laboratory station and specifying a reference station, constructing a time transfer link, solving the receiver clock error based on an ionosphere-free combination model, and inversely deducing the hardware time delay of a station to be calibrated through clock error difference; the distribution is discriminated through time delay residual statistical characteristics, a model is matched to calculate a type B uncertainty, and an empirical type B uncertainty is obtained through weighted summation; a standard deviation of a calibration time sequence is calculated to obtain a type A standard uncertainty estimation value; a synthetic expanded uncertainty is calculated by fusing the empirical type B uncertainty and the type A standard uncertainty estimation value, the calibration result reliability is evaluated, and uncertainty quantitative analysis of time delay calibration is realized. The application provides a clear and reliable evaluation framework for link calibration error, and significantly improves the reliability and interpretability of the calibration result.

The invention discloses a large-scale Beidou network high-precision time transfer processing method, system and device, and the method comprises the steps: constructing a Beidou time transfer model, and constructing a Beidou network time transfer model through a plurality of Beidou time transfer models; selecting an observation station in the Beidou network as a reference station and a satellite with the highest elevation angle as a reference satellite, and eliminating rank deficiency through parameter reforming to obtain a full-rank Beidou network time transfer model; and estimating each parameter in the full-rank Beidou network time transfer model by using Kalman filtering. In a Beidou network time transfer model, non-common-view satellite resources are fully utilized, satellite clock correction and receiver clock correction are synchronously estimated, and it is guaranteed that observation information is sufficient and the model is self-consistent; according to the method, non-common-view satellite resources of all tracking stations can be fully utilized, limitation of observation distance is avoided, dependence of a traditional Beidou time transfer method on satellite precision clock correction products is effectively eliminated, satellite resource waste is avoided, and stability and precision of real-time time transfer of the large-scale Beidou network are improved.

A time transfer method based on undifferenced and uncombined PPP-RTK is applied to a time transfer system including a PPP-RTK network end observation station network and PPP-RTK user end observation stations. The network end observation station network includes GNSS reference stations and a network data processing center. The user end observation stations include a time reference station and an ordinary user station. The method includes: acquiring GNSS observations collected by the GNSS reference stations and performing an undifferenced and uncombined PPP-RTK resolution to generate network end products; each of the user end observation stations performing an undifferenced and uncombined PPP-RTK resolution by using collected GNSS observations and the network end product to generate multi-GNSS receiver clock biases; and solving a combined inter-station clock bias by using the receiver clock biases of the ordinary user end observation stations and those of the time reference station serving also as user end.

The invention discloses a high-precision digital double-mixing phase discriminator, and belongs to the technical field of time transfer. Comprising a sampling amplification module, the output end of the sampling amplification module is connected with a signal processing module, and the output end of the signal processing module is connected with a result output module; the sampling and amplifying module is used for receiving two paths of input clock signals fCLKA and fCLKB, and sampling and amplifying the fCLKA and fCLKB by cascading two paths of multi-stage D triggers, so that the phase difference of the two paths of input clock signals is reserved and amplified, and the probability of metastable state occurrence is reduced; the signal processing module is used for carrying out jitter optimization processing on the two paths of sampled and amplified signals and extracting stable signal edges; and the result output module is used for measuring the amplified phase difference according to the two paths of signals subjected to jitter optimization, and obtaining the original phase difference through scaling down. Digital amplification is adopted, analog devices are not needed, noise introduction and delay uncertainty are avoided, and therefore the linearity and reliability of measurement are improved.

The invention discloses an intelligent traction power supply system power adjusting method and system. Comprising the following steps: calculating real-time transfer power, and calculating compensation current in real time by combining a power transfer error and negative sequence current; calculating a current tracking value based on the current inner loop instruction value and the voltage synchronization signal; designing a feedforward-feedback composite controller, and respectively calculating a feedforward compensation quantity and a feedback control quantity; based on the feedback control quantity and the feedforward compensation quantity, the total duty ratio of the PWM modulation signal is calculated, and a railway power regulator is driven to output an actual current value; the control method and system provided by the invention are low in engineering implementation cost, adaptive to the RPC application scene of the traction substation, and easy to popularize.

Methods and systems are described herein for time synchronization of a distributed sensor array system (“distributed system”). The distributed system includes multiple sensor nodes, which are time-synchronized using a combination of RF signal data and message-based time techniques across multiple communications mechanisms. Time synchronization is implemented both internally between a sensor node's components and over-the-air between different sensor nodes. The distributed system further employs multiple layers of standardized and custom synchronization protocols to build a scalable, potentially zero-hop, time transfer network. The time synchronization accuracies achieved by the time transfer network enable coherency in the distributed system.

The application relates to a BMC management and time transfer implementation method based on communication fusion, and belongs to the fields of time transfer and BMC health management. The BMC information management function realizes the collection and reporting of the voltage, current, temperature and other sensor values of each functional board card through RS485, I2C and other data transmission protocols, and simultaneously judges the current working state of the board card according to a preset threshold value; the RMC time serial port information receiving and processing function realizes the compatibility of three kinds of input time protocols by analyzing the RMC time statements received by the serial port; the PPS signal acquisition and serial port external time function realizes the external six-way RS422 time and one-way PTP time by setting an interrupt processing function, collecting the time data of the FPGA in time when the PPS signal occurs, editing the message according to the protocol and sending the data through the serial port. The application realizes the simultaneous operation of the BMC management and time transfer.

This invention discloses a time-frequency maintenance method, apparatus, and system based on dual-source discipline and drift prediction, relating to the field of satellite time synchronization and time transfer technology. The method includes: S1, acquiring first data and second data in real time; S2, analyzing the first frequency offset based on the first data and analyzing the cumulative phase of the second frequency offset based on the second data; S3, analyzing the target phase value based on the cumulative phase of the second frequency offset and the first data; S4, analyzing the frequency offset correction value based on the target phase value and the first frequency offset; S5, controlling the center frequency of the thermostatic crystal oscillator based on the frequency offset correction value and outputting a time-frequency signal; S6, returning to S1 and repeating S1-S5 in a loop to achieve time-frequency maintenance. By introducing the BeiDou satellite navigation system as a time-frequency reference source in addition to the cesium clock, the simultaneous operation of the two sources achieves the following objectives: reducing the frequency offset of the cesium clock, improving frequency accuracy, and significantly improving the timekeeping performance of the cesium clock.

This disclosure presents a method and a system for time transfer over network nodes (TTNN) by applying a digital time processing (DTP) to a timing referencing frame defined with ingresses of Sync messages, in order to define a timing implementing frame, and a direct compensation of residence times (DCRT) of network nodes, equipped with unified clocks (UCs) driven by slave clocks aligned to a grand master clock (GMC), and by adding estimates of upstream links delays to slave times driven by the slave clocks.

The invention relates to the technical field of power equipment state monitoring, and discloses a main transformer vibration characteristic intelligent analysis method and system, and the method comprises the steps: collecting vibration and current signals of a multi-load level in a health state, carrying out the decoupling of a vibration source, calculating a transfer function, and constructing a time-varying transfer function tensor representing the health state; during online monitoring, real-time signals are obtained, and a real-time transfer function matrix is calculated; interpolating the tensor according to a real-time load to obtain a health reference transfer function matrix matched with the current working condition; calculating a difference value between the real-time matrix and the health reference matrix, and obtaining a differential response field capable of stripping the influence of the working condition; and finally, on the basis of the differential response field, establishing and solving a physical inverse problem to realize reverse inversion and positioning of the abnormal state in the main transformer. According to the method, the interference of working condition change on vibration analysis is effectively solved, the decoupling of a fault source and the accurate positioning of internal abnormity are realized, and the accuracy and reliability of diagnosis are improved.

The invention provides a common-view time transfer method based on multiple GEO satellites, and the method comprises the steps: selecting a plurality of GEO satellites in the visual range of two tracking stations, carrying out the common-view time transfer through employing each GEO satellite, and obtaining the common-view time transfer result of each GEO satellite; preprocessing the common-view time transfer result of each GEO satellite to obtain a preprocessed common-view time transfer result; traversing each GEO satellite, analyzing the stability of the link of the current GEO satellite, and meanwhile, referring to a broadcast ephemeris to judge whether the current GEO satellite is in an orbit maneuvering state; if not in the track maneuvering state, allocating weights to the track maneuvering state based on a static self-adaptive weight allocation method, otherwise, allocating weights to the track maneuvering state based on a dynamic self-adaptive weight allocation method; and based on the weight distributed for each GEO satellite, performing weighted average processing on each preprocessed common-view time transfer result, and finally obtaining a common-view time transfer result of the multiple GEO satellites.

The invention discloses a precise point positioning time transfer method integrated with a Beidou common-view technology, which comprises the following steps of: simultaneously observing a Beidou satellite by an observation station A and an observation station B, and respectively calculating clock differences of receiver clocks of the observation stations relative to a Beidou satellite navigation system; in each epoch, screening out all satellites observed by the two observation stations together, and calculating the difference between receiver clock differences of the two observation stations when the same satellite is observed in a common-view manner; and selecting one common-view satellite in different time periods to obtain a clock difference between two places of the common-view satellite. According to the method, a common-view technology and a precise single-point positioning time transfer technology are fused, a PPP double-frequency ionosphere eliminating model is adopted, a precise ephemeris product and a precise clock correction product are utilized, the clock correction of a receiver clock relative to a Beidou satellite navigation system is calculated, and then the common-view technology is utilized to subtract the clock correction of the receivers in the two places, so that the precision single-point positioning time transfer technology is obtained. Errors such as troposphere delay, satellite orbits and satellite clock correction are eliminated, and the two-ground clock correction with higher precision and stability is obtained.

The invention belongs to the technical field of network security and financial risk control, and particularly relates to a method and system for preventing telecommunication fraud, and the method comprises the following specific steps: S1, a remittance side risk level pre-judgment and confirmation mechanism: after a remitter inputs collection account information and submits a transfer amount, the remitter receives the collection account information; automatically associating a public security anti-fraud database, a bank risk control blacklist and historical transaction records, performing risk grade division on a collection account, and displaying a risk prompt to a remitter in real time; and S2, a fund freezing mechanism: after the remitter transfers an account to the account of the payee, automatically marking the fund as a'to-be-authenticated state 'and freezing the fund. The fund is set to be in a to-be-authenticated state through a fund freezing mechanism, a payee is forcibly required to complete authentication to use the fund, and an operation window of'second-to-'split 'of a fraudulent is blocked in time; and in cooperation with a grading unfreezing mechanism, the one-time transfer risk is further reduced, and the fund recovery probability is remarkably improved.

The application discloses a power distribution network expansion planning method considering space-time transfer of loads and multi-energy flow coordination, comprising the following steps: (I) using SOP to perform flexible interconnection reconstruction on a network frame; (II) establishing a DHM-PCS operation model; (III) configuring DHM-PCS in the power distribution network according to a time sequence voltage sensitivity index; and (IV) constructing a planning model. The photovoltaic consumption method can consume energy in three dimensions of time energy translation, space energy transfer and energy category energy conversion; the dimension of consumption is improved from optimization of a point to coordination between networks; the DHM-PCS configuration model of limited key nodes is constructed by considering the coordination characteristics between feeders, so that the maximum global consumption benefit is realized.

The invention provides a time synchronization method and system based on satellite common view and time transfer, and belongs to the technical field of time synchronization, and the method comprises the following steps: confirming a GNSS system time source and at least two external wired time sources, and carrying out the credibility detection of the GNSS system time source; performing anti-cheating detection on the external wired time sources, confirming the priority, and sorting the external wired time sources based on the priority; when the time source of the GNSS system passes the credibility detection, the time source of the GNSS system is used as a main time source; when the time source of the GNSS system does not pass the credibility detection, selecting an external wired time source with the highest priority to replace the main time source; and calibrating a local endogenous time source of the master station based on the time signal of the master time source, generating master station synchronization time, and performing slave station time synchronization. According to the method, the GNSS system time source and the external wired time source are detected at the same time, the time source with the highest credibility is selected for synchronization, and the accuracy and safety of time synchronization are improved.

Aspects presented herein may enable a user equipment (UE) to obtain and utilize crowdsourced system information block (SIB) data from a server do determine whether to decode SIB to improve the overall performance of positioning and power consumption. In one aspect, a UE receives, from a network entity, a portion of information related to a SIB based on a position of the UE, where the SIB is associated with a time transfer, where the information related to the SIB includes at least one of: an availability of the SIB, a type of the SIB, a transmitting interval of the SIB, a time uncertainty (TUNC) associated with the SIB, a time error associated with the SIB, or a reliability of a serving cell timing. The UE decodes the SIB based on the portion of the information.

The application relates to a Beidou / Galileo system fusion-based satellite-based precise timing method and system. Observation data, broadcast ephemeris data and correction numbers broadcast by a Beidou three-satellite system and a Galileo satellite system are respectively received by a receiver, two different systems are fused for timing, system clock differences between the two satellite systems are respectively taken as constants, white noises and random walks for construction of an estimation model, a PPP fusion model of the two satellite systems is constructed, each estimation model is brought into the fusion model for calculation, the estimation model corresponding to the best timing precision is taken as an optimal estimation model for correction of the system clock difference, other satellite data is corrected, receiver clock difference parameters are obtained, the parameters are used for clock taming, and satellite-based precise timing is completed. The method has higher timing precision and a wider application range.

A method and system for time transfer between a first clock and a second clock. The system for time transfer comprises an entangled photon transmitter, a first photon receiver, and a second photon receiver. In the first embodiment, the entangled photon transmitter is located separate from the first photon receiver, and the second photon receiver. In the second embodiment, the second photon receiver is located separate from the entangled photon transmitter and the first photon receiver. The entangled photon transmitter and the first photon receiver are co-located. In the third embodiment, the second photon receiver and the entangled photon transmitter are located separate from the first photon receiver.

The invention discloses a linear voltage-time converter circuit supporting rail-to-rail input and an implementation method. The circuit structurally comprises a main input branch, an auxiliary input branch, a differential output node, an output buffer stage and a reset module. The non-linearity of the first differential pair of the main input branch is compensated through the auxiliary input branch, and the compression non-linearity of the voltage-time transmission characteristic of the auxiliary input branch and the expansion non-linearity of the voltage-time transmission characteristic of the main input branch are approximately offset in a wide input voltage range. Therefore, good linearity can be maintained under high input voltage swing. According to the invention, a full parallel structure is adopted, the design is simple, and the robustness is high; the linear input range is expanded to the whole power rail, the problem of distortion under large signal input is solved, the available input dynamic range of the circuit is greatly widened, the gain is adjustable, and the circuit is suitable for various application scenes needing high-linearity large signal processing.

The invention discloses a time-frequency maintaining method, device and system based on double-source taming and drift prediction, and relates to the technical field of satellite time service and time transfer, the method comprises the following steps: S1, obtaining first data and second data in real time; s2, analyzing a first frequency offset according to the first data, and analyzing a second frequency offset according to the second data; s3, analyzing a target phase value according to the second frequency offset and the first data; s4, analyzing a frequency offset correction value according to the target phase value and the first frequency offset; s5, controlling the center frequency of the constant-temperature crystal oscillator according to the frequency offset correction value, and outputting a time-frequency signal; s6, returning to S1, and circularly and repeatedly operating S1 to S5 to realize time-frequency maintenance; besides the cesium clock, a Beidou satellite navigation system is introduced as a time frequency reference source, and double sources operate simultaneously, so that the following purposes of reducing the frequency deviation of the cesium clock, improving the frequency accuracy and greatly improving the timekeeping performance of the cesium clock are achieved.

A quantum orchestration platform (QOP) comprises a collection of processing units and analog components that produce synchronized analog pulses, readouts, and computations that may be used for operations with qubits. All processing units of the QOP are synchronized with minimal skew via time processing over one or more sync cables that interconnect the processing units.

Two-way time transfer and ranging that measures and compensates for Doppler shifts is provided herein. A first endpoint transmits a request message initializing a dopplerField (DF). Relay node(s) moving relative to the first endpoint receive the request message, measure ingress and egress frequency ratios, increment DF by a difference between these ratios, and transmit the request message containing the incremented DF. A second endpoint receives the request message containing the incremented DF, and generates a reply message containing the incremented DF. The relay node(s) receive the reply message, measure ingress and egress frequency ratios, increment the incremented DF by a difference between these ratios, and transmit the reply message containing the incremented DF. The first endpoint receives the reply message containing the incremented DF, and uses it to calculate a range-rate of components in the mobile network relative to the first endpoint.