1224 results about "Time difference" patented technology

The invention relates to the technical field of fault monitoring, in particular to a power transmission line fault monitoring and positioning method, system and device and a medium. The method comprises the following steps: firstly, performing digital conversion on an original current signal to obtain time sequence data, and then identifying and classifying fault events through threshold detection and a feature extraction algorithm to obtain classification labels of fault types; then, based on the classification label, establishing a traveling wave propagation model and carrying out time difference calculation, carrying out clustering analysis on a plurality of wave head data in a preset time window, and judging whether the fault is a single-point fault or a multi-point fault through a clustering result; and finally, a positioning result is transmitted to the central server for comprehensive verification and alarm management, and a final fault response is formed. By introducing a time series data analysis and clustering judgment mechanism, the fault type can be accurately identified, single-point and multi-point fault conditions can be effectively distinguished, and meanwhile, the reliability of a positioning result is improved through comprehensive verification of the central server.

The invention relates to the technical field of edge computing, in particular to a safety production monitoring method based on edge collaboration, which comprises the following steps: collecting multi-node clock pulses, calculating adjacent time differences to form a pulse difference parameter set, carrying out statistical distribution, setting a dynamic tolerance boundary, and constructing an effective deviation parameter set; the method comprises the following steps of: generating a weighted smooth deviation result by combining clock stability and link delay weighted normalization, sorting monitoring data according to a timestamp to identify duplication abrupt change exception, constructing a cross-node exception time sequence by associating nodes and time information, and judging a safety state transition result of equipment. A time difference parameter is constructed through multi-node reference pulse arrival time, a dynamic deviation constraint is formed by combining distribution characteristics, clock stability and link measurement weighted smoothing are introduced, cross-node time reference consistency is kept, operation data unified time sequence rearrangement is carried out, a sudden change event reliably reappears in a time window, and an abnormal identifier is associated with a node identity. And forming a cross-node event evolution link.

The invention discloses an intelligent water supply management system and method based on wind-light-water multi-source data fusion, and relates to the technical field of electric digital data processing. The system comprises a time alignment deviation quantification module, a time alignment regulation and control module, a data fusion timeliness response quantification module and a timeliness response regulation and control module. According to the method, the time alignment deviation quantization result is obtained by quantizing the multi-source data time parameters, whether time alignment regulation is carried out or not is judged, if yes, the timeliness response parameters are obtained after regulation, and if not, the timeliness response parameters are directly obtained and quantized to obtain the data fusion timeliness response quantization result; and whether PLC scanning interval regulation and monitoring verification are carried out or not is judged based on the data fusion timeliness response quantification result, so that the timeliness of water supply management demand response is improved, and the problem that in the prior art, the water supply management execution response flexibility is poor due to the fact that the time difference of multi-source data processing is not fully considered is solved.

The invention relates to the technical field of time synchronization, and discloses a hybrid time service method based on Beidou satellite navigation and a TSN, which comprises the following steps: acquiring network topology structure information and historical time service error data of each synchronization node in a target distributed system, and constructing a dynamic time delay state set for jitter identification; based on the dynamic time delay state set, a current global time reference is extracted through a time calibration algorithm, a time difference reference vector sequence is generated, and initial synchronization adjustment is carried out on the TSN main node; constructing an inter-node clock convergence function curve according to the slave node response stability, and judging whether the synchronous network is in a low jitter interval or not based on the time offset rate and the time drift trend change; in combination with the node time state after directional offset suppression, a multi-channel redundant time synchronization mechanism in a time window is applied, a weight adjustment coefficient is extracted, and an unbalanced calibration factor is introduced; and according to a regression correction result, evaluating a time service stability index in real time. The method has the advantage of improving the time service stability.

The invention relates to the technical field of atomic clock control, and discloses a punctuality type atomic clock control method based on a microwave frequency band. The method comprises the following steps: firstly, acquiring microwave frequency band signal data and atomic state data, and constructing a time calculation model in combination with historical operation data to output a theoretical time value; performing multi-dimensional difference analysis on the theoretical time value and the actual measurement time value to generate a time difference coefficient matrix; inputting the matrix into a spatial propagation analysis network, and combining atomic clock component parameters and environmental parameters to generate a time anomaly probability distribution diagram; and finally, configuring microwave control parameters according to the distribution diagram, including starting a high-frequency monitoring mode for a high-probability abnormal region and applying a disturbance test to adjacent frequency bands. According to the method, through multi-dimensional data modeling, difference analysis and dynamic parameter configuration, the accuracy and adaptability of atomic clock control are improved, and the operation stability of the atomic clock in a complex environment can be enhanced.

In one embodiments, a first device includes a first n-pulse-per-second (nPPS) output interface to be connected to a second nPPS input interface of a second device via a first clock connection, and to send a first pulse at time A to the second nPPS input interface for receipt at time B, and a first nPPS input interface to be connected to a second nPPS output interface of the second device via a second clock connection, to receive a second pulse at time D from the second nPPS output interface sent at time C, and to log time D in a first memory, and delay computation circuitry to compute a clock connection delay in the first clock connection and / or the second clock connection based on time A, time D, and a time difference between receiving the first pulse in, and sending the second pulse from, the second device.

The invention relates to the technical field of construction control, in particular to an underground super-long thick and large concrete structure construction control method and system.The method comprises the following steps that through vertical displacement and strain data, trend extraction nodes are analyzed, difference sections are divided, load recognition influence areas are positioned, and structural sections are sequenced according to fluctuation increments; and adjusting cooling, supporting and loading parameters to form an intervention arrangement, and performing year-on-year adjustment based on construction data to generate feedback to complete regulation and control. According to the method, load-deformation dynamic mapping is established through time sequence association of displacement and strain data, a difference section identification mechanism is constructed based on time difference comparison, natural deformation and load surge response are distinguished, fluctuation characteristics of a load surge section are extracted to form response sensitivity ranking, and cooling parameters and a loading sequence are dynamically adjusted in combination with increment comparison. Graded regulation and control are realized, space-time dimensions of construction records and monitoring data are coupled, the crack positioning precision is improved, the predictability of deformation control is enhanced, and the regulation and control redundancy cost is reduced.

Various aspects of the present disclosure relate to a user equipment (UE) that receives first control signaling indicating position information associated with a non-terrestrial station (NTS), the position information including an altitude of the NTS, a distance between the NTS and the apparatus, and / or an indication of a timing delay between the NTS and the apparatus. The UE also receives second control signaling indicating a first configuration identifying a first reference signal occasion. The UE determines a temporal range of an expected reference signal time difference duration based in part on the position information and the first configuration, and receives a reference signal during the temporal range of the expected reference signal time difference duration.

The embodiment of the invention provides a chip design verification method and a related device. The chip design verification method comprises the steps of obtaining a to-be-tested chip design and executing the to-be-tested chip design; in the process of executing the to-be-tested chip design, when it is detected that a current transaction processed by the to-be-tested chip design generates blocking delay due to input blocking conditions, if it is determined that the blocking delay exceeds the upper limit of the preset blocking period number, the blocking delay caused by the input blocking conditions is relieved, and the current transaction continues to be processed; in the process of continuing to process the current transaction, if it is detected that the current transaction generates transaction processing delay due to a non-input blocking condition and it is determined that the transaction processing delay exceeds a preset delay upper limit, an error indication is returned; wherein the transaction processing delay is the time difference between the moment when the starting signal of the current transaction is valid and the moment when the completion signal is valid. Through transaction processing delay detection, omission of scenes with problems in the chip can be avoided, and comprehensiveness of problem detection is enhanced.

The invention belongs to the technical field of sintering batching control, and particularly relates to a sinter alkalinity control method and system. The method comprises the following steps: acquiring a first-stage ratio adjustment amount according to update states of an XRF data source and an LIBS data source; based on the time difference between XRF data source updating and LIBS data source updating, a second-stage ratio adjustment amount is obtained according to the first-stage ratio adjustment amount; performing amplitude limiting protection on the second-stage ratio adjustment amount to obtain a third-stage ratio adjustment amount; and the sinter raw material ratio is adjusted according to the third-stage ratio adjustment amount, and the sinter alkalinity is controlled. According to the invention, modeling is carried out on the data dynamic trend of the LIBS data source, and the evolution rule of the batching process is captured, so that more scientific closed-loop control is realized; the traditional thought of directly utilizing LIBS data to predict the sintering state or purely depending on mixture component data and target value deviation is abandoned, the problems of single data point noise interference and model alignment are effectively avoided, and the control robustness is improved.

The invention relates to a method for monitoring jamming or synchronism of a main engine brake of a vertical elevator, and aims to monitor and diagnose the jamming or synchronism state of the elevator brake in real time through the combination of an acceleration sensor and an electromagnetic signal. The method comprises the steps that acceleration sensors are installed on the two brake component sides of the elevator brake, vibration acceleration signals of the two brake components are collected, or the response time difference between the action vibration acceleration signals and voltage signals of the brakes on the two sides is calculated through time sequence analysis through a vibration switch with an adjustable threshold value and by means of the single-chip microcomputer technology; and the action response time difference of different brake components is determined. If the time difference exceeds the preset threshold value, it is judged that the brake is jammed or has an asynchronous fault. And finally, according to a conjoint analysis result of the vibration acceleration signal and the voltage signal, accurate diagnosis and real-time early warning of brake jamming or synchronization faults are provided. According to the method, the detection precision and response speed of elevator brake jamming or asynchronous faults can be improved, and reliable guarantee is provided for safe operation of an elevator.

The invention discloses a real-time monitoring and intelligent early warning method for ultrasonic equipment, and relates to the technical field of ultrasonic equipment monitoring, and the method comprises the steps: obtaining the input condition parameters of the ultrasonic equipment, and obtaining the calling part information of equipment parts related to the ultrasonic equipment based on the obtained input condition parameters; generating a simulation state parameter diagram according to the obtained operation parameter items and the input condition parameters; real-time equipment operation parameters of the ultrasonic equipment are obtained, and a real-time state parameter diagram is generated; performing differential comparison on the obtained real-time state parameter diagram and the simulation state parameter diagram, analyzing whether the operation state of the equipment component is abnormal or not according to a differential comparison result, and generating corresponding early warning information; according to the numerical difference and the time difference of each parameter item of the actual operation parameters, whether the operation of each parameter item of the corresponding equipment component in the corresponding operation stage is abnormal is comprehensively evaluated, so that more refined early warning of the ultrasonic equipment is realized.

The invention discloses a foundation pit support deformation real-time monitoring method based on edge calculation, and aims to solve the problems of multi-node time synchronization and clock drift compensation caused by unavailability or poor quality of satellite navigation and precise time protocols in an underground or shielded environment. According to the method, through event dictionary learning, partition time slot scheduling and safety coding micro excitation time synchronization, matched filtering decoding, multi-scale arrival time estimation, paired time difference robust fusion, frequency priority and phase speed limit correction and network disconnection time holding, the time synchronization efficiency is improved; the technical effects that multi-source data alignment, deformation field reconstruction and graded early warning are completed on the unified virtual reference time scale, and high-precision synchronization and online drift compensation are obtained without depending on the external time service condition are achieved.

A method for measuring spin of a golf ball includes obtaining at least two images of the golf ball after a golf club contacts the golf ball. The method also includes identifying the time span between the obtained at least two images to create a numerical time difference, defining an outline of the golf ball while the golf ball is in flight, finding at least one marking on the golf ball in each golf ball image, finding the rotations of the golf ball by aligning the at least one marking on the golf ball in each golf ball image, and converting the rotations of the golf ball into spin values by combining the rotations and the numerical time differences, wherein the spin values comprise at least a spin axis and a rotation angle. The spin values may then be displayed to a user.

Provided are a data transmission circuit system and a data reception circuit system, which use an edge of a pulse signal. The data transmission circuit system modulates a digital signal by using time levels determined by time differences between rising edges (or falling edges) of a clock pulse signal and rising edges (or falling edges) of a data pulse signal. The data reception circuit system demodulates a digital signal by using time levels determined by time differences between rising edges (or falling edges) of a recovered clock pulse signal and rising edges (or falling edges) of a data pulse signal.

The invention discloses a cosmic ray muon-based time synchronization system and synchronization method, and relates to the field of digital information transmission. The system comprises a time detector and a track detector which are arranged corresponding to a standard clock, and a case matching module, a time difference calculation module, a time adjusting module, a time detector and a track detector which are arranged corresponding to a clock to be calibrated, the case matching module is used for matching the cosmic ray muons according to the track information of the cosmic ray muons detected by the two track detectors and determining whether the cosmic ray muons penetrating through the two time synchronization devices belong to the same muon case or not, and if the cosmic ray muons penetrating through the two time synchronization devices belong to the same muon case, the time difference calculation module is used for obtaining theoretical flight time according to the track information detected by the track detectors; actual flight time is obtained according to a time detector; the time deviation is calculated according to the actual flight time and the theoretical flight time, the time adjusting module calibrates the clock to be calibrated according to the time deviation, and the precision and reliability of time synchronization in complex environments such as underwater and underground environments are improved.

The invention relates to a long-gap discharge leader development speed measurement method based on radiated electromagnetic wave detection. The method comprises a set of high-frequency antennas and a high-speed oscilloscope and a long-gap discharge leader development speed calculating method. The method adopts a certain antenna arrangement form; long-gap discharge radiated electromagnetic wave pulse time is detected simultaneously through the plurality of antennas; leader head position is positioned according to time difference of a signal arriving at different antennas; and furthermore, the long-gap discharge leader development speed can be calculated. The method can effectively improve the measurement precision of the discharge leader development speed, and resolution reaches the level of 0.1 ns.

The invention discloses a power transmission line fault positioning method, device and equipment and a readable storage medium. The method comprises the steps that a first time domain signal, collected by a first collection device, of a traveling wave and a second time domain signal, collected by a second collection device, of the traveling wave are obtained, and the first collection device and the second collection device are located on the two sides of a fault point respectively; converting the first time domain signal into a first frequency domain signal, and converting the second time domain signal into a second frequency domain signal; according to the first frequency domain signal and the second frequency domain signal, obtaining the time difference of the traveling wave arriving at the first acquisition device and the second acquisition device; and carrying out fault positioning based on the time difference. According to the invention, the time when the traveling waves arrive at the devices at the two sides is not calculated separately, but the time difference when the traveling waves arrive at the devices at the two sides is calculated directly by using the two traveling waves, thereby avoiding the situation that the error of a power transmission line fault positioning result is amplified when the two times are calculated separately in a conventional method, improving the accuracy of the power transmission line fault positioning result, and improving the accuracy of the power transmission line fault positioning result. And the application range is wider.

A mine earthquake positioning method based on an improved pigeon inspired optimization algorithm comprises the following steps: 1) preprocessing original mine earthquake waveform data by using ACF to obtain an ACF sequence; 2) performing first arrival time pickup on the processed data by using a long and short time window algorithm STA / LTA; (3) storing the station coordinates and the first arrival time picked in the step (2) into a file according to the format of station coordinates X, station coordinates Y, station coordinates Z and first arrival time; 4) reading the file generated in the step 3), and setting an upper boundary and a lower boundary of a search space; 5) selecting a combination of a time-of-arrival method and a variance function as a target function; and 6) using the improved pigeon inspired optimization algorithm FC-PIO to carry out seismic source positioning operation: minimizing the target function in the step 5) through the improved pigeon inspired optimization algorithm FC-PIO, finding an optimal solution, and obtaining the occurrence position of a mine earthquake event. Through the method, the mine earthquake positioning precision and efficiency can be remarkably improved in practical application, and the reliability of mine safety monitoring is ensured.

The invention provides a method and device for detecting abnormity of a time service link, and the method comprises the following steps: S1, selecting a section from a main time service link as a to-be-replaced section, and replacing the to-be-replaced section with a standard reference link as a detection time service link; s2, calculating the time difference of the time service signals received by the receiving equipment from the two time service links; s3, judging whether the replaced section is normal or not according to the time difference; and S4, taking the section except the section to be replaced in the main time service link as a residual section, replacing the residual section by using the standard reference link to serve as a detection time service link, and repeating the steps S2-S3. The method has the beneficial effects that the troubleshooting range can be quickly narrowed by adopting a link replacement mode, a large-scale link problem is positioned as a small-section problem, so that abnormal equipment is found within a small number of iterations, the absolute delay inequality can be accurately calculated by a receiving end due to introduction of a standard reference link, and the fault detection accuracy is improved. The signal sending time can be obtained for quantization time delay, and the detection precision is improved.

The invention discloses an audio and video acquisition synchronous management method, and relates to the technical field of data synchronization. The method is executed by main control equipment and comprises the following steps: S1, acquiring a satellite time reference through a dual-mode time service module; s2, based on the pulse signal of the temperature compensated crystal oscillator, a master clock signal is generated according to a formula Tmaster = TGPS + alpha delta T + beta (delta f / f0), TGPS is a satellite time reference, alpha is a temperature compensation coefficient and ranges from 0.2 to 0.8, and beta is a frequency drift correction factor; s3, establishing an inter-device time synchronization communication link through an IEEE 1588PTP protocol, and broadcasting a synchronization pulse by the main control device; s4, the data buffer area is adjusted in real time according to the dynamic buffer control formula D (t) = D0 + k1 * (delta t) 2 + k2 * d delta t / dt, k1 = 0.15 ms-2, and k2 = 2.5 ms2 / s; s5, when the network time delay gt is detected; and at 150ms, switching to a local clock compensation mode, and triggering the extended Kalman filter to re-correct the clock parameters. According to the invention, a hybrid synchronization architecture with local clock correction capability is constructed, and self-adaptive time difference compensation without network dependence is realized.

The invention relates to the technical field of solid state disks, in particular to a data guarantee method and device for an open-state physical block, equipment and a storage medium. Comprising the following steps: determining a detection period of an open-state physical block based on NAND physical attribute parameters of the physical block; when the physical block is in the open state, recording an initial timestamp corresponding to the opening moment of the physical block and triggering a detection process; if the detection process is in the detection period, obtaining a current timestamp, and calculating a time difference between the current timestamp and the initial timestamp to obtain the opening duration of the physical block; calculating theoretical filling time according to the number of filled physical pages in the physical block and the detection period; and if the opening duration is greater than the theoretical filling time, writing virtual data into the to-be-filled physical page, otherwise, waiting for a next detection period to execute detection. According to the method, the limitation of fixed period operation is avoided, effective management of open physical block data is realized, and the use efficiency and reliability of the solid state disk are improved.

Methods for tracking a signal origin by a spectrum analysis and management device are disclosed. Signal characteristics of other known emitters are used for obtaining a position of an emitter of a signal of interest. In one embodiment, frequency difference of arrival technique is implemented. In another embodiment, time difference of arrival technique is implemented.

The invention discloses a distributed simulation time consistency implementation method and system, and relates to the technical field of distributed simulation interaction.In the method, distributed simulation subsystems firstly utilize an NTP algorithm to correct respective local clocks, a simulation model is promoted to conduct simulation according to the corrected local clocks and the time granularity of the distributed simulation subsystems, and when interaction is conducted, the time consistency of the distributed simulation subsystems is achieved. Simulation time differences of distributed simulation subsystems of two interaction parties are judged, and simulation data are processed by adopting an interpolation method, a pre-estimation method and / or a data buffering technology, so that interaction data are kept consistent in time. Therefore, the method is suitable for a complex distributed simulation environment in which subsystems have different time granularities, and can improve the real-time performance and precision of time synchronization.

A computing system, a method and a computer program product for presenting a determined optimal duration of video recap of media content. The method includes detecting, via a processor of a computing system, selection of a current episode of media content for playback. In response to detecting selection of the current episode of the media content for playback, the method includes determining a first time difference between a current time and a previous viewing time of prior episodes. The method includes determining, based on the first time difference, a first time duration for a first video recap of the prior episodes of the media content. The method includes streaming the first time duration of the first video recap of the media content for presentation on an electronic device as a preview presented prior to streaming the current episode of the media content for presentation on the electronic device.

Disclosed are a system on chip, method and device supporting time synchronization, and a storage medium, which relate to the technical field of time synchronization, the system on chip synchronizes the time of an STBM in the system on chip with the time of an off-chip master clock through a first processor core according to a first preset period; based on the first time of the STBM after time synchronization, calibrating a hardware clock of the first network card to obtain a first time reference; calibrating the time of the STBM based on the first time to obtain a second time reference; synchronizing, by the second processor core, the time of the second network card with the time of the first time reference based on a first time difference between the first network card and the second network card; and synchronizing the system time with the time of the second time reference based on a second time difference between the second time reference and the system time of the operating system. According to the system, double time references can be obtained, sub-microsecond-level synchronization precision is realized, and the strict requirement of a high-precision time synchronization scene on time synchronization precision is met.

The invention belongs to the technical field of radio metering detection, and particularly discloses a time difference and angle measurement method and device for a microwave navigation landing system and a medium, and the method comprises the steps: responding to a received barker code, obtaining reference time, and carrying out the time synchronization; obtaining a scanning pulse according to the scanning interval and the back-scanning interval; analyzing and extracting the A / D sampling signal according to the scanning pulse to obtain a forward scanning beam and a backward scanning beam in the scanning pulse; obtaining a scanning time difference according to the forward scanning beam and the backward scanning beam; according to the scanned time difference, analysis is carried out based on non-constant clock counting, and a time difference signal is obtained; obtaining MLS angle data based on preset space angle position coding data according to the time difference signal; the invention aims to solve the problems of weak anti-interference acting force and low angle guiding precision of a microwave navigation landing system in the prior art.

The invention belongs to the field of high-precision time calibration and navigation positioning, and discloses a rubidium atomic clock calibration method based on a Rowland system and a related device. Spectral analysis is performed based on a Welch method and an adaptive peak detection method so as to accurately identify frequency, amplitude and phase parameters of periodic components, then a mixed time difference model including a secondary trend term, a multi-period term and a noise term is constructed, and the model is solved by adopting a least square method so as to obtain key performance parameters of the rubidium atomic clock. And finally completing time calibration of the Rowland system taming rubidium clock. By adopting the method, the parameter estimation precision of the rubidium clock is effectively improved, the problems of mode aliasing, noise sensitivity, non-unique result, low calculation efficiency and the like are solved, and reliable and real-time calibration of the rubidium atomic clock by the Roland system is realized.

The invention relates to the technical field of cable measurement, and particularly discloses an insulated cable operation supervision method and system, and the method comprises the following steps: obtaining the current sequence of each signal of each monitoring point; the signal comprises a vibration signal and a current signal of the insulated cable; calculating the abnormal score of the current sequence at each monitoring point, and taking the moment when the abnormal score is greater than the improved threshold value of the corresponding monitoring point as the abnormal moment of the corresponding monitoring point; and positioning a fault point by adopting a time difference positioning method according to the abnormal moment and position of each monitoring point. According to the scheme, the fault of the insulated cable can be found in time, and economic loss is prevented.

The invention discloses a virtual digital human multimedia teaching interaction method and system and a storage medium, and the method comprises the steps: calculating an audio mouth shape time difference, a mouth shape subtitle time difference, an audio subtitle time difference and a video mouth shape time difference based on a same-window data group on the basis of a unified time aperture and a window, comparing the time differences with a time difference threshold value, and outputting a dislocation alarm result, unified constraint on four types of key alignment relationships is realized; when an alarm is triggered, selecting a degradation strategy according to a dislocation alarm result and generating an execution record, and summarizing the dislocation alarm result and the execution record to form an evidence chain data packet; when the cumulative number of times in the preset window number exceeds a diffusion blocking threshold value, recording output is switched into a video stream which retains audio and subtitles and does not overlap mouth shapes; and generating a correction release stream based on the evidence chain data packet, and replacing the recorded broadcast corresponding time slice and retaining the Hash verification value when the time sequence consistency index meets the release threshold, thereby realizing drivable treatment action, suppressible diffusion and replaceable correction.