45 results about "Time transfer" patented technology

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.

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 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.

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.

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 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.

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.

Embodiments of the present specification provide a method, device and electronic equipment for improving fund arrival time limit, wherein in the method, after receiving a payment request of a payment user, a bank information table pre-stored in a block chain is queried to determine whether the payment bank and the receiving bank are in the bank information table. If the payment bank is in the bank information table, the receiving bank is not in the bank information table, but the region where the receiving bank is located is in the bank information table, the payment user's fund is transferred from the payment bank to a first transfer bank through the block chain, and then the payment user's fund is transferred from the first transfer bank to the receiving bank. Therefore, the payment path of the payment user can be disassembled and matched with the bank existing on the block chain, the payment path is split into the real-time transfer of the block chain and the traditional clearing network in the same region, so that the payment time limit for the payment user can be realized in quasi-real time, and the user experience is improved.

This application discloses a multi-sensor synchronized visual inertial odometry system and its synchronization method. The system includes: a computing platform, an MCU, a data bus, a communication interface, and two or more sensors. The computing platform is connected to the MCU via the data bus, and the MCU is connected to the sensors via the communication interface. The computing platform is also connected to both the communication interface and the sensors. The computing platform is used to initialize the MCU's parameters, acquire sensor data measured by the sensors, and perform preset processing. The MCU is used to control the sensor's triggering method according to the initialization parameters. The sensors are used to acquire sensor data. This application can reduce synchronization time errors and improve sensor compatibility, and can be widely applied in the field of multi-sensor synchronized time synchronization.

The application provides a multi-GEO satellite-based common view time transfer method, which comprises the following steps: selecting multiple GEO satellites in the visible range of two tracking stations, respectively using each GEO satellite to perform common view time transfer, and obtaining common view time transfer results of the GEO satellites; preprocessing the common view time transfer results of the GEO satellites to obtain preprocessed common view time transfer results; traversing the GEO satellites, analyzing the stability of the link of the current GEO satellite, and simultaneously referring to broadcast ephemeris to determine whether the current GEO satellite is in an orbit maneuvering state; if not, assigning a weight to the GEO satellite based on a static adaptive weight distribution method, or assigning a weight to the GEO satellite based on a dynamic adaptive weight distribution method; and based on the weights assigned to the GEO satellites, performing weighted average processing on the preprocessed common view time transfer results to finally obtain multi-GEO satellite common view time transfer results.

A GNSS-independent method for asymmetric delay error compensation to minimize time deviation when using two-way time transfer in a communication network is provided. The method comprises establishing a two-way virtual path comprising at least one link path LP1 to LP4 on the network to communicate between a first node A and a second node B, sending a two-way data stream through the virtual path, and providing a new delay correction factor to minimize the time deviation of a local time in the second node with a previously stored link profile or a calibrated virtual path or a stable local clock in holdover mode associated with the delay correction factor.

The invention discloses a lymphatic station transfer prediction method and device. The method comprises the following steps: acquiring position information of at least one transferred first lymphatic station in a preset number of lymphatic stations, and mapping the position information of each first lymphatic station into an embedding vector with the same dimension to obtain a corresponding embedding matrix; determining prior knowledge embedding vectors of a preset number of lymphatic stations from the lung lymphatic station knowledge graph, and determining mask marks of the preset number of lymphatic stations; and analyzing the embedded matrix, the priori knowledge embedded vectors and the mask marks of the preset number of lymphatic stations by using a lymphatic station transfer prediction model through a mask-prediction strategy to obtain the predicted transfer probabilities of all second lymphatic stations except all the first lymphatic stations in the preset number of lymphatic stations. The technical problem that the real-time transfer state of the lymphatic station cannot be dynamically predicted in the prior art is solved.

This invention discloses a method, apparatus, terminal equipment, and storage medium for assessing the spatiotemporal load transfer potential of a data center, relating to the field of load assessment technology. The method includes: acquiring load transfer assessment parameters for the data center; determining a divisibility coefficient based on the maximum number of parallel subtasks and a preset parallelism benchmark value; determining a time flexibility coefficient based on the latest completion deadline and expected execution duration; determining a state dependency coefficient based on the total amount of migration state data and a preset state quantity benchmark value; determining a spatial transferability coefficient based on available link bandwidth, scheduling period length, data volume required for task migration, and data center transmission distance; and weighted summing of the above coefficients to obtain a load spatiotemporal transfer potential coefficient, thereby determining the load spatiotemporal transfer potential. By implementing this invention, the problem of prior art using only maximum tolerable latency to measure flexibility, leading to a deviation between the assessment results and actual schedulable capacity, can be solved, improving the matching degree of potential assessment results.

A continuous time transfer method based on Beidou No.3 PPP-B2b information, the steps are as follows: S1. If the observation data is continuous, use Beidou No.3 PPP-B2b information to solve PPP and obtain time transfer result; S2. If the observation data is abnormal and causes instantaneous interruption of observation data, use the clock difference result predicted by the historical clock difference data of the receiver as the time transfer result of the current epoch. High-precision time transfer can be realized without relying on the Internet, and the situation of short-term interruption of signals caused by shielding and instantaneous interference is considered. By modeling the receiver clock, the re-convergence speed of PPP is accelerated, continuous time transfer is realized, the application range of GNSS precise timing / time transfer technology in the field of national defense and military is effectively expanded, and the availability and reliability of GNSS time transfer in the instantaneous interference environment are improved.

The invention relates to a staying activity place analysis method based on user behaviors. The method comprises the following steps: acquiring staying point data of a user in a physical space; associating external geographic information data on the basis of the stay point data, and obtaining marked site function attribute data; extracting a time transfer sequence between the places from the marked place function attribute data, and processing the transfer sequence by adopting a sequence modeling algorithm to obtain a predicted moving mode path; wherein the moving mode path reflects a site association rule; and judging and correcting the predicted moving mode path, and generating a user behavior dynamic report. By integrating staying and moving details, a user behavior rule is accurately described, the accuracy and integrity of trajectory analysis are remarkably improved, and the method is suitable for scenes such as intelligent navigation and behavior prediction.

A time transfer system and method based on frequency domain slicing technology, the system comprises a near-end device, an intermediate download device, a remote-end device; the near-end device and the remote-end device comprise a bidirectional connector, a wideband signal generator S1, a wideband signal generator S2, a transmitter, a receiver, an analog-digital conversion and filtering unit F1, an analog-digital conversion and filtering unit F2, a signal processing unit; the intermediate download device comprises: a download device, a wideband signal generator S1, a wideband signal generator S2, a receiver, an analog-digital conversion and filtering unit F1, a signal processing unit. The method encodes time information from a local clock source into a wideband signal, one way is sent through the transmitter, and the other way is cut into multiple narrowband signals, the received signals are operated in the same way, the corresponding narrowband signals are respectively operated in the cross-correlation operation, and all the narrowband signal measurement results are averaged as the result of this measurement. The intermediate site can obtain the bidirectional transmission signal, and distributed time service is realized.

The application discloses a double-factor combined weight setting ALGOS comprehensive atomic time algorithm improvement method, which introduces the frequency prediction deviation of current period atomic clock data and the historical atomic clock data frequency prediction deviation to form double factors for combined weight setting in weight design, so as to improve the stability and accuracy of the atomic time algorithm. The innovation of the method is to optimize the weight scheme of the classical ALGOS algorithm, and the frequency prediction deviation of the current period atomic clock is integrated into the weight calculation process. The frequency prediction deviation of the current period atomic clock is obtained by subtracting the average value of the calculated frequency value and the predicted frequency value of the time transfer data. The design can effectively suppress the interference of the atomic clock data with good historical data frequency predictability and poor current period frequency predictability on the final time scale, and improve the short-term stability of the time scale.