16results about How to "High time accuracy" patented technology

The present application belongs to the field of rocket launch measurement and control technology, and particularly relates to a method and system for timing the separation of a rocket connector. The method comprises: collecting and preprocessing a separation trigger signal generated when the rocket connector separates from the rocket body; identifying the first generation time of the separation trigger signal based on the preprocessed separation trigger signal; determining the separation start time using the first generation time as a reference; simultaneously receiving a positioning signal of the rocket connector and using the disappearance time of the positioning signal as the separation end time; obtaining the separation duration based on the difference between the separation end time and the separation start time; storing the separation start time, the separation end time, and the separation duration; comparing the separation duration with a preset standard duration; generating a timing report and sending a timing completion instruction; and completing the timing of the separation of the rocket connector. The present application achieves timing of the separation of the rocket connector without the need for additional on-rocket equipment, has strong anti-interference capability, and has high timing accuracy.

The utility model provides an air quality detector, including main casing and the top cover of being connected in the top of main casing, be equipped with a plurality of independent chambers for installing sensor in main casing, and the part of main casing is directly opposite sensor is evenly distributed with a plurality of air inlet hole, be equipped with a plurality of interval setting ridge between top cover and main casing to make the clearance between the periphery of top cover and main casing form the flow guide groove. The utility model discloses a flow guide groove is arranged in the periphery of top cover, and the air inlet hole is used for air inlet in the position of corresponding sensor in lower part, not only makes the air even flow, avoids the airflow dead angle and retention, improves the response time and measurement accuracy of sensor, also ensures internal gas flow unobstructed, reduces the internal and external pressure difference, promotes the detection accuracy, through setting up independent detection chamber, different sensor module is isolated, and each sensor is equipped with independent detection chamber, prevents the cross interference between sensor, ensures each sensor independent work, improves the independence and reliability of measurement data.

This application provides a printing timing control method, a printer, a program product, and a storage medium, relating to the field of electronic digital data processing. Utilizing a double-buffered structure of a character buffer and a transmit character buffer, the generation process of print data is physically isolated from the hardware transmission process. This avoids the serial dependency of waiting to transmit and transmitting while waiting to generate, as found in related technologies. It allows the main control module to pre-generate subsequent data and store it in the first-level cache during the hardware transmission intervals. This smooths out fluctuations in data generation time caused by differences in image complexity and avoids hardware stalls caused by computational delays.

According to the long-distance high-precision time service system and method based on the time-triggered Ethernet, absolute time synchronization of one master and multiple slaves in a domain is achieved on the basis of being compatible with the standard of the time-triggered Ethernet, the system and method can be used for the single time reference of the whole network, a plurality of time synchronization master nodes can also be arranged according to subsystems, and the time synchronization efficiency is improved. The subsystems use respective time reference sources and time formats and do not interfere with one another; the redundancy time synchronization based on the priority can be conveniently realized only by deploying a plurality of time synchronization master nodes using the same time format in the whole network, and a plurality of time reference redundancies can be set and work simultaneously, so that the synchronization reliability is improved.

The present application relates to the technical field of aerial bomb fuze, and discloses a novel aerial bomb fuze clockwork mechanism with rotation speed control, which comprises a gear train, a rotor prime mover body, a safety device, a lower check ring and a rotor, characterized in that the safety device is fixed on the shaft of the gear train by the lower check ring, the safety device is provided with gear teeth and is engaged with the output wheel in the gear train, and the safety device is driven to rotate by the output wheel; the constant speed governor is located between the gear train and the toothed disc, the toothed disc is fixed with the bushing through riveting and is fixed on the central shaft by the upper check ring; the other end of the anemometer shaft is connected with the rotor seat through screw threads, the rotor seat can rotate relative to the time mechanism shell and drives the anemometer to rotate; and the rotor is fixed on the rotor seat. The present application can improve the timing accuracy, prevent the safety from being released too early, better protect the safety of the airplane and the pilot, has certain overload resistance, and when the overload reaches 20G, all the internal parts can remain stable and will not be damaged.

The invention belongs to the technical field of iron core grounding current monitoring of transformers, and particularly relates to an iron core grounding current recording method based on precise time synchronization. Comprising the following steps: collecting a current signal through an iron core and a clamp grounding current sensor; time deviation caused by RTC is calibrated continuously in the collection process; performing cyclic sampling and calculation on an output signal of the sensor, sending total current and multiple harmonic waves obtained by Fourier calculation to a display end of an upper computer, and starting fault recording when the value of the total current meets a fault judgment threshold value; when it is judged that a fault occurs, an accurate time mark is provided through an accurate time synchronization function, reserved historical data and collected real-time data are spliced into a wave recording graph during the fault period, and the wave recording graph is backed up and transmitted to a display end of an upper computer to be stored and displayed. According to the invention, some fault phenomena which are short in duration and rapid in generation and disappearance can be effectively monitored, and the change trend of iron core and clamp current when faults occur can be effectively monitored.

The application provides a world model-based simulation data synthesis method and system for embodied robots, and relates to the technical field of robot simulation, wherein the method comprises the following steps: acquiring the electrode node contact current of the wall-climbing robot shell contact surface, the environmental humidity and the initial distribution state of the liquid, dynamically correcting the spreading speed and calculating the actual water depth, and then determining the friction force attenuation parameter, inputting the determined friction force attenuation parameter into a world model together with a to-be-executed action sequence for deduction, and outputting simulation data, so that the physical authenticity of the simulation and the strategy migration robustness are effectively improved.

The application discloses a kind of based on single-fiber unidirectional multiple time-frequency signal simultaneous transmission method, sending end and receiving end, specifically related to digital communication technical field;The sending end of the present application receives multiple time-frequency signals for fusion processing, and uses time division multiplexing to transmit multiple time-frequency signals based on single-fiber unidirectional single-wavelength mode, and the receiving end recovers the original time-frequency signal fusion processing from the mixed time-frequency signal to complete multiple time-frequency signal output, so as to improve the utilization of transmission medium, reduce cost and facilitate engineering deployment;In addition, a time source fusion algorithm is also innovatively proposed, which dynamically adjusts the weight of the phase difference of each time source in the fusion phase difference based on the variance of the phase difference of the local core time of different time sources, and then dynamically calculates the time source fusion phase difference to improve the system timing accuracy under multiple time sources;Compared with single-fiber unidirectional wavelength division multiplexing mode, the present application has the advantages of consistent multiple time-frequency signal transmission delay, simple hardware design and low cost.

This invention discloses a method and apparatus for assessing the probability of vegetation ecosystem loss under combined meteorological-agricultural-hydrological drought stress. The method includes: collecting standardized precipitation evapotranspiration index (SPEI), standardized runoff index (SRI), and standardized soil moisture index (SSMI) on a grid-by-grid, monthly timescale in the study area, as well as total primary productivity (GPP) representing the health status of the vegetation ecosystem in each season; calculating the lag response time of GPP to different drought indices in different seasons, and determining the season in which GPP is most sensitive to drought stress; for the most sensitive season, selecting SPEI, SSMI, and SRI sequences at the scale corresponding to the lag response time, and establishing a four-dimensional Vine Copula model grid-by-grid; setting different drought and GPP loss level classification criteria, and establishing a vegetation productivity loss probability assessment model based on Bayesian theory. This method can more comprehensively and accurately assess the probability of vegetation ecosystem loss under drought stress.

The invention relates to a brain signal basic processing system and processing method for a multi-mode electroneurographic signal, and the system comprises an electroneurographic signal abnormity detection module which is configured to output a qualified multi-mode electroneurographic signal; the intracerebral and extracerebral unified spatial position coding module is configured to output a multi-modal electroneurographic signal with position codes; the dynamic brain region spatial convolution module is configured to perform adaptive spatial weighting on the multi-modal neuroelectric signals and convert the heterogeneous multi-channel neuroelectric signals into isomorphic single-channel feature sequences; and the composite self-supervised learning module is configured to execute self-supervised training combining mask prediction and autoregression prediction on the isomorphic single-channel feature sequence, and output a brain signal basic model after pre-training is completed, so as to complete downstream task evaluation based on the brain signal basic model after pre-training is completed. According to the method, the performance of multi-dimensional downstream tasks in the brain-computer interface field is improved, and the requirement of the downstream tasks for the data scale is reduced.

The application provides a power distribution network post-disaster fault repair scheduling method and system considering voltage support capability, and belongs to the technical field of post-disaster scheduling of power distribution networks; the method comprises the following steps: obtaining initial data of the power distribution network, estimating and dynamically correcting the fault removal time based on three-point evaluation, and generating a task sequence and team configuration; then, a branch reactive power-voltage sensitivity index is calculated, which is aggregated into node equivalent voltage support capability through series-parallel equivalence, and a load dynamic recoverability discrimination criterion is constructed accordingly; then, the criterion is taken as a recovery boundary, and a repair model aiming at maximizing the load recovery amount is constructed under three constraints; finally, the repair is solved and executed by using a beam search algorithm; the application can accurately depict the dynamic characteristics of voltage support, explicitly process the variation of fault removal time, and give a dynamic optimization scheduling strategy closely coupled with the on-site repair progress, thereby significantly improving the safety and feasibility of post-disaster recovery decisions.

This invention discloses a high-precision timing method, device, medium, and program product for chips, relating to the field of timing. The high-precision timing method for chips includes: creating a desired timer and a global timer on the current chip; performing start offset compensation on the global timer of the current chip based on a cold reset signal and a start compensation value, and performing periodic frequency offset compensation on the global timer of the current chip according to the period difference between the desired timer and the global timer; and aligning the compensated global timer across clock domains using Gray code cross-clock synchronization. The technical solution of this invention can improve the timing accuracy of the global timer on the chip.

The invention relates to the field of integrated circuits, in particular to a multistage threshold watchdog circuit based on temperature compensation and a control method thereof and a chip device, and the circuit comprises a watchdog counter which is used for outputting a count value; the temperature compensation calculation unit is used for dynamically compensating a counting threshold value of the watchdog counter based on the acquired current temperature value, a temperature-frequency characteristic curve of a clock source and a compensation mode; and the state machine is used for outputting a corresponding control signal based on a comparison result of the counting value and the counting threshold value. According to the invention, false triggering / missing triggering of watchdog reset caused by clock source frequency temperature drift is avoided, the timing precision of the watchdog is improved, the fault-tolerant capability of the system is improved, and the reliability of the system is enhanced.

In order to overcome the technical problem of poor time sequence control precision in the prior art, the invention provides a circuit and a chip for generating a clock signal. The circuit for generating the clock signal comprises a first NAND gate device and a second NAND gate device which are in cross coupling, the first output end of the first NAND gate is connected with the fourth input end of the second NAND gate, the second output end of the second NAND gate is connected with the second input end of the first NAND gate, and a closed-loop cross coupling structure is formed. By means of the connection mode, output signals of the two NAND gates are mutually restricted and triggered, and a time sequence interlocking mechanism is achieved. Namely, when the first NAND gate outputs a high level, the signal is transmitted to the fourth input end of the second NAND gate, and the output of the second NAND gate is a low level. And vice versa. In this way, the overlapping problem that clock signals are low in level at the same time is completely eradicated structurally, and the non-overlapping time sequence precision of the clock signals is greatly improved.

The application provides an artificial intelligence-based auxiliary penalty method and a real scene hawk eye system, which comprises the following steps: acquiring continuous image frames collected by a camera in real time, wherein the image frames comprise a tennis court and a tennis ball located in the tennis court; detecting the position of the tennis ball and the landing position of the tennis ball in a tennis bounce frame from the continuous image frames; taking N pixel points to the left and right and M pixel points to the top and bottom of the landing position of the tennis ball in the tennis bounce frame as a center to form a region of interest; identifying the tennis ball contour and the court boundary line in the region of interest; and generating a penalty result according to the positional relationship between the tennis ball contour and the court boundary line. The application can reduce the system cost, ensure the accuracy, improve the real-time performance, and has important significance for popularizing the hawk eye system in the field of national fitness.

This invention discloses a time synchronization method based on BeiDou satellites, comprising the following steps: S1: acquiring the ephemeris, satellite observation data, and B2b satellite correction data messages of BeiDou-3 satellites; S2: performing anomaly processing on the satellite observation data; S3: combining the ephemeris and the anomaly-processed satellite observation data, using a PPP floating-point solution function model for pseudorange single-point positioning; S4: calculating the satellite's position coordinates based on the ephemeris and B2b satellite correction data messages; S5: inputting the pseudorange single-point positioning result and the satellite's position coordinates into a Kalman filter for filtering, followed by PPP precise single-point positioning processing to obtain the receiver clock bias; S6: inputting the receiver clock bias data into a clock control module to adjust the clock and complete synchronization. In this invention, each device acts as a master station, achieving high-precision positioning of each device through the PPP-B2b model, combining positioning technology with time synchronization technology, thereby improving the synchronization accuracy between devices.