107 results about "Time system" patented technology

The invention discloses a six-degree-of-freedom multi-spacecraft control experiment platform and method based on semi-physics-virtuality, belongs to the technical field of spacecraft system and control system simulation, and constructs a multi-spacecraft system composed of semi-physics spacecrafts and pure virtual spacecrafts. The attitude of the semi-physical spacecraft is simulated by a simulator mounted on a three-dimensional attitude air floating table, is acquired by a sensor and is converted into a rotation matrix form, and a translation part of the semi-physical spacecraft is virtually calculated through a simulation integrator; the pose of the virtual spacecraft is virtually simulated by an SE (3) integrator with high-guarantee geometric characteristics; the system takes the ROS as a communication framework, and realizes state and instruction release by adopting a custom message; and ensuring that the time system of each spacecraft is consistent with the real time through a time synchronization mechanism. The platform supports cooperative operation of a semi-physical spacecraft and a pure virtual spacecraft, and has the characteristics of flexible structure, high simulation precision and good expandability.

The invention relates to a self-correction hybrid power regulation method based on working condition compensation. The method comprises the following steps: monitoring and collecting a group of system real-time data streams; accessing a three-dimensional mapping model and indexing a group of load segmentation thresholds matched with the real-time system working conditions; generating a power reference value and a real-time power calculation value respectively by using the real-time data and the load segmentation threshold value; judging whether interval offset occurs or not based on the change trend of the real-time system load, and resetting the real-time power calculation value by using the power reference value when the interval offset occurs; monitoring a correction offset generated during resetting, and performing three-dimensional mapping on the model based on the correction offset; and outputting the reset real-time power calculation value as a final power regulation instruction. The method can utilize the high resolution characteristic of real-time parameters, and also can periodically correct accumulative errors through a reference model capable of being adaptively updated, so that high-precision and long-period stability can be realized at the same time under complex and changeable working conditions.

The application discloses a kind of trusted time stamp devices, it is related to trusted time technical field, including: trusted satellite time signal receiving module, for identifying and receiving time signal from satellite navigation system provided, and through signal discrimination mechanism, resist and filter out the satellite signal of forgery or tampering, obtain trusted satellite time signal;Trusted optical fiber time signal receiving module is used to identify and receive the trusted optical fiber time signal originating from ground-based time service system, obtain trusted optical fiber time signal;Trusted NTP time signal receiving module is used to synchronize trusted NTP reference time from trusted time system with NTS protocol two-way identity authentication and encrypted mode, obtain trusted NTP time signal;Trusted time signal selection module is used to select trusted satellite time signal, optical fiber time signal and NTP time signal according to priority;Trusted time stamp verification module is used to realize the stamping and verification of time stamp;The application can ensure that the time used for stamping is trusted.

The invention provides a real-time redundancy fault-tolerant communication system based on double RS-485 links, and belongs to the technical field of industrial communication and real-time control, the real-time redundancy fault-tolerant communication system comprises two electrically independent and logically cooperative RS-485 physical links, at least one master node and a plurality of slave nodes, the first RS-485 link is used for sending data frames to the slave nodes by the master node, and the second RS-485 link is used for sending data frames to the slave nodes by the slave nodes; the second RS-485 link is used for sending a feedback frame from the slave node to the master node, the slave node and the master node form a parallel or alternate pipelined communication relationship in time, the feedback frame comprises two timestamps, the first timestamp records the moment when the slave node receives the data frame, and the second timestamp records the moment when the slave node sends the feedback frame. The system is simple in structure, low in cost, high in real-time performance and high in reliability, is suitable for real-time systems of industrial control, robots, motion control and the like, and is a low-cost alternative scheme of the real-time Ethernet.

The invention provides a task scheduling method, a scheduling system, a client and a computing device cluster, and the method comprises the steps that the scheduling system obtains information of a first computing task, the information of the first computing task comprises first execution time of the first computing task, and the first execution time is time under a first time system; and the scheduling system determines a first time period corresponding to the first calculation task from the plurality of time periods according to the first execution time, and schedules the first calculation task when the current time is in the first time period. Wherein the multiple time periods are different time periods under the second time system, the second time system and the first time system are different timing systems, the first execution time corresponds to second execution time under the second time system, and the second execution time is located in the first time period. According to the scheme, the management complexity of the calculation task can be reduced.

The present invention comprises a cuff (20), a cuff pressure adjustment unit (32, 33), and a pressure sensing unit (31) that senses cuff pressure. During a pressure release process, the time at which a waveform feature point of a pulse beat was generated for each pulse of a pulse wave indicated by an artery passing through a measurement target site is recorded. During the pressure release process, a memory (51) is caused to sequentially store, as a data pair, the time at which the waveform feature point of the pulse beat was generated and the cuff pressure at that time. The cuff pressure is displayed on an indicator (50).In the pressure release process, an observer listening for a Korotkoff sound with a stethoscope while observing the cuff pressure displayed on indicator (50) operates an operating unit (52B) and inputs a time signal indicating the time at which the observer judged that the generation of the Korotkoff sound had ceased. A data pair corresponding to one pulse beat preceding a data pair corresponding to the time is specified, and a cuff pressure contained within the specified data pair is recorded as a corrected diastolic blood pressure value.

The present application relates to the technical field of power equipment state monitoring and centralized alarm, in particular to a distributed disconnecting switch operation state centralized alarm system. The system receives state events and operation command records uploaded by the distributed disconnecting switch through the centralized alarm processing end, generates aligned state sequences of the same operation process according to the event time, message sequence and the last trusted state; obtains state transition residuals through the software state machine containing stable split position, stable closed position and transition state, and generates topological consistency residuals in combination with the one-time system topological constraint relationship, and forms time consistency residuals according to the command issuing time, the first variable position time and the final stable state time. The system can distinguish the real disconnecting switch operation abnormality from the data abnormality caused by message disorder, delay and jitter, and improve the reliability of centralized alarm judgment and the consistency of alarm object positioning.

The disclosed techniques provide dynamically controlled notifications that improve inclusiveness in online meetings. The dynamically controlled notifications can be audio or visual indicators that supplement a first notification. A user input causes the display of the first notification, an image of a “virtual hand raise.” The input also invokes a timer for measuring an elapsed time from the time of the user input. The system also analyzes audio streams to detect topic transitions of a discussion of the meeting participants. Then, the system generates dynamically controlled notifications in response to at least one triggering event, either (1) in response to detecting that the timer has reached a time threshold or (2) in response to a detection of that the discussion has transitioned to a new topic. In some embodiments, the dynamically controlled notifications are invoked in response to either of the two triggering events, whichever event is detected first.

A heterogeneous multi-core system to execute a real-time system of an automobile includes a plurality of system-on-chips in electronic communication with one another. Each system-on-chip includes a plurality of central processing units (CPUs) arranged into a plurality of logical domains. The heterogeneous multi-core system also includes a plurality of dispatched tasks that execute based on an execution pipeline and each perform a particular set of tasks for one of the logical domains. The plurality of dispatched tasks includes at least one offset dispatched task that executes at an offset time and a reference dispatched task that is located upstream of the execution stage of the offset dispatched task on the execution pipeline. The reference dispatched task communicates data to the offset dispatched task and the offset time represents a period of time measured relative to the reference dispatched task.

Systems, methods, and devices provide efficient wake operations and boot times for electronic devices. Methods include initiating, using one or more processing elements, a boot operation associated with a plurality of power domains, and determining, using the one or more processing elements, a type of the boot operation based, at least in part, on current status information identifying a current status of each of the plurality of power domains. Methods further include determining, using the one or more processing elements, one or more authentication operations based, at least in part, on the type of boot operation and a configuration of the plurality of power domains being booted, performing, using the one or more processing elements, the one or more authentication operations prior to booting the power domain.

Systems and methods are described for handling connection rejection on behalf of a source WTRU to a WTRU (U2U) relay via a wireless transmit / receive unit (WTRU) associated with a fallback time. The relay WTRU may retry to establish a connection with the target WTRU on behalf of the source WTRU, e.g., based on receiving a rejection (e.g., with a fallback value) from the target WTRU. The source WTRU may associate the rejection message with the target WTRU, and the relay WTRU may be available to contact other target WTRUs. The relay WTRU may send reject messages to other source WTRUs for the same target WTRU (e.g., if the fallback duration is active, is running).

The application discloses a kind of intelligent wearable equipment with low-power consumption control function of scheduling follow, comprising: shell;Identity recognition interaction unit is set to the surface or inside the shell, for collecting the identity identification information of current taking personnel in taking stage;Multi-dimensional perception positioning unit is set to the shell, for switching to full-function operating state according to activation instruction, and switching to dormancy inhibition state according to dormancy instruction;And controller, for obtaining the taking personnel identity identification information downloads the target scheduling table of unique binding, real-time system time is obtained and the system time is compared with the target scheduling table;When determining that the system time is in the working period, generate activation instruction and send to the multi-dimensional perception positioning unit;When determining that the system time is in the non-working period, generate dormancy instruction and send to the multi-dimensional perception positioning unit.

The embodiment of the invention provides an SLAM (Simultaneous Localization and Mapping) positioning method and device based on timestamp correction, equipment and a storage medium. The method comprises the following steps: acquiring a time compensation value, an image observation result and a system state of each window in a current sliding window; constructing an SLAM model according to the time compensation value of the window in the current sliding window, the image observation result and the system state, wherein the time compensation value is the time deviation between the time system of the camera and the time system of the IMU; and the SLAM model is solved to obtain to-be-estimated parameters, and the to-be-estimated parameters comprise the system state of each window in the current sliding window and a to-be-estimated time compensation value. In the method, the time compensation value and the system state are modeled together, so that continuous iterative optimization can be performed on the time compensation value, the time compensation value is used to compensate the time system of the camera, and the compensated time system of the camera is used to perform SLAM model modeling, so that the estimation result of the SLAM system is more accurate.

A SLAM positioning method and apparatus based on timestamp correction, a device, and a storage medium are provided. The method includes: acquiring a time compensation value, an image observation result, and a system state of each sub-window in a current sliding window; constructing a SLAM model based on time compensation values, the image observation results and the system states of the sub-windows in the current sliding window, where the time compensation value is a time deviation between a time system of a camera and a time system of an IMU; solving the SLAM model to obtain a parameter to be estimated, including the system state and the time compensation value to be estimated of each sub-window in the current sliding window.

The application discloses an energy-saving scheduling method for self-hanging real-time tasks, and belongs to the field of real-time system scheduling and energy efficiency management. The method gives a task division strategy by considering the load difference of tasks and processors on a multi-core CPU platform. On a GPU platform, the real-time performance and energy consumption are balanced by selecting a suitable execution core. Through the combination of the two, energy-saving scheduling and task division for a multi-core CPU and GPU heterogeneous computing platform are realized. The energy consumption of the CPU and the GPU can be optimized synergistically on the premise of guaranteeing the real-time task deadline. A system-level energy efficiency perception scheduling framework is constructed, which is suitable for real-time cyber-physical systems, automatic driving, embedded vision and other scenes with strict requirements for energy efficiency and timing.

The application discloses a time synchronization system and method of a handheld multi-sensor fusion scanning platform, and the system comprises an upper computer and a microcontroller configured as a main clock source of the system; the microcontroller is used for generating at least a message synchronization control pulse signal, a hardware trigger pulse signal and a serial time message defining a main time system; the upper computer comprises a time synchronization device running a raw data receiving module, a time stamp synchronization calibration module and a data storage and visualization module, different time synchronization strategies are adopted for different sensors, including external direct time service, time system offset calibration and trigger acquisition and low-delay near-neighbor matching strategy. The application uses a microcontroller as a synchronization core, and realizes a hardware time synchronization precision of sub-millisecond level without any expensive external synchronization equipment; the time synchronization system and method have high flexibility and robustness, and can guarantee efficient and low-delay data processing.

The application discloses a method for protecting time stamp of embedded system, which is executed based on a time stamp protection time correction module in the embedded system, and comprises the following steps: step S1, optimizing the floating point operation function of the compiling tool used by the time stamp protection time correction module, and eliminating the problem of abnormal zero of the floating point operation result; and step S2, the time stamp protection time correction module creates a time system data receiving communication link based on a preset configuration, and configures the time system data receiving timeout parameter of the communication link; the application solves the technical problems of time stamp abnormality, false time correction and poor stability caused by step-by-step time correction, operation defects of the compiler, and coupling of the time correction module and the service data processing module.

Technologies for automated scheduling of meetings includes receiving an email communication including an indication of a request to schedule the meeting. In response, each day within a range of days is allocated into time slots and each time slot is assigned an availability score based on an indicated availability of each participant of the requested meeting. Each time slot is assigned a time slot score based on the availability score, a time slot bonus based on the time of day of the corresponding time slot, and a day penalty based on a temporal distance to the day in which the corresponding time slot occurs. The time slot in which to schedule the meeting is selected based on the time slot score of each corresponding time slot. If a time slot within a reference day range cannot be identified, one or more conflicting meetings may be rescheduled to a new time slot based on various characteristics of the requested meeting, the conflicting meeting, and the new time slot.

The application discloses a high-precision time offset autonomous calculation method and system based on satellite speed v and gravity acceleration g. By establishing a closed correlation between the gravity field strength and the orbital speed, the traditional multi-parameter relativistic time correction model is simplified to a closed-form calculation depending on only two in-orbit measurable physical quantities, without the need for input of orbital radius, universal gravitational constant, earth mass, external ephemeris, etc. The application has outstanding originality, simple calculation, strong autonomy and reliable precision, can realize a daily cumulative time error of less than 1 ns, is suitable for low-orbit satellites, navigation satellites, constellation systems and various high-reliability time service scenarios, has a wide application range and high industrial value, and can significantly improve the autonomous time service capability of a spacecraft and the stability of a time system.

To provide a annual paid leave management device, a hour-based annual leave management method, and a hour-based annual leave management program capable of issuing an alert at a timing when an upper limit of an annual time holiday is exceeded when a hour-based annual leave hour-based annual leave is applied.SOLUTION: Time holiday application data in which an application working day and an application time of a time holiday by an applicant are set are acquired, it is determined whether or not the time holiday application of the applicant is appropriate on the basis of the time holiday application data and working data, and an alert is output when it is determined that the time holiday application of the applicant is not appropriate.SELECTED DRAWING: Figure 1

This utility model discloses a timekeeping device with a shock-absorbing structure, comprising: a left retainer on the left side and a right retainer on the right side; side damping plates are fixedly connected to the inner walls of both the left and right retainers; upper damping pads are fixedly connected to the top inner sides of both the left and right retainers; an upper clamping plate is fixedly connected to the lower surface of the upper damping pads; and movable grooves are provided on the bottom surfaces of both the left and right retainers. A bottom support plate is hinged inside the movable groove, and a lower damping pad is fixedly connected to the upper surface of the bottom support plate. The upper and lower damping pads cooperate with the upper and lower clamping plates respectively, abutting against the upper and lower surfaces of the timekeeping device. The elasticity of the pads buffers vertical vibrations, reducing the direct impact of vibrations on the device. The side damping plates on the inner walls of the left and right retainers are movably connected to the left and right sides of the device, absorbing lateral vibrations and limiting lateral displacement, further enhancing the shock-absorbing effect.

The invention provides a satellite reflector antenna control function verification system and method. The system comprises a stand-alone simulation subsystem, a timing system module and a consistency comparison module. The timing system module is respectively connected with input interfaces of the simulation software modules for communication, and the consistency comparison module is respectively connected with output interfaces of the simulation software modules for communication; the timing system module is used for simulating and generating unified timing system information and sending the unified timing system information to the single-machine simulation subsystem and the consistency comparison module for time sequence calibration; the single machine simulation subsystem is used for acquiring virtual data of each satellite single machine in a target planning scene through each simulation software module matched with the target planning scene according to the target planning scene of the satellite reflector antenna, and sending the virtual data to the consistency comparison module; the consistency comparison module is used for comparing the virtual data corresponding to each satellite single machine with the real data, and judging whether the conditions in a preset theoretical range are met or not.

The disclosed techniques provide dynamically controlled notifications that improve inclusiveness in online meetings. The dynamically controlled notifications can be audio or visual indicators that supplement a first notification. A user input causes the display of the first notification, an image of a “virtual hand raise.” The input also invokes a timer for measuring an elapsed time from the time of the user input. The system also analyzes audio streams to detect topic transitions of a discussion of the meeting participants. Then, the system generates dynamically controlled notifications in response to at least one triggering event, either (1) in response to detecting that the timer has reached a time threshold or (2) in response to a detection of that the discussion has transitioned to a new topic. In some embodiments, the dynamically controlled notifications are invoked in response to either of the two triggering events, whichever event is detected first.

The invention discloses an embedded active vibration control device and method based on a heterogeneous multi-core architecture, the core of the device is a heterogeneous multi-core processor, and the device comprises a real-time processing core and an application processing core; and respectively operating a real-time system and a universal operating system which are isolated from each other. The real-time system uninterruptedly executes core control tasks such as vibration signal acquisition, vibration suppression calculation and output at a fixed period; the general operation system is responsible for non-real-time functions such as human-computer interaction, communication and high-performance calculation; the two cores share data through an inter-core communication mechanism to realize function collaboration. Compared with the prior art, the hybrid key deployment architecture is adopted on the single heterogeneous multi-core processor, so that high-determinacy real-time vibration control and complex non-real-time function collaboration are realized, and the absolute reliability of a core control task is ensured.

A time-of-flight system includes an emitter-circuit generating and directing pulses of light toward a target, and a receiver-circuit including a photodetector coupled between a bias node and a sensing node to detect pulses that have reflected off the target, a comparison circuit comparing a sense voltage at the sensing node to a reference, a timing measurement circuit measuring elapsed time between generation of a given pulse and detection thereof after reflection off the target, and a programmable current sink that sinks a current from the sensing node equal to a portion of a photocurrent generated by the photodetector due to detection of ambient light. A timing-generation circuit synchronizes generation of the pulses and measurement of elapsed time by the timing circuit. A processor adjusts a magnitude of the current sunk from the sensing node based upon output of the comparison circuit when the emitter circuit is deactivated.

The invention discloses a high-dynamic large-scale directional networking simulation system and method. The high-dynamic large-scale directional networking simulation system comprises a guidance subsystem, a timing system subsystem, a general excitation subsystem, an efficiency evaluation subsystem, a multi-node simulation subsystem and external physical nodes, the multi-node simulation subsystem comprises a plurality of universal networking modules and member switching equipment; the external physical node comprises a plurality of networking devices and correspondingly connected directional networking antennas. The method comprises the following steps: guiding and generating task files and uniformly issuing a timing system; the universal excitation issues antenna pointing, a frequency hopping pattern and service data one time slot ahead of time; the digital switching equipment completes intra-cluster, inter-cluster and virtual-real data exchange; and the efficiency evaluation subsystem collects and outputs network efficiency in real time. According to the invention, digital exchange is adopted to replace a traditional radio frequency matrix, so that the cost is remarkably reduced, the reliability and expansibility of the system are improved, an aerospace-level high-dynamic directional networking scene can be truly reproduced in a laboratory, and an efficient verification platform is provided for research and development of related protocols, algorithms and chips.

This invention discloses a spaceborne optical switching system, method, and related apparatus based on a superframe time slot mechanism. The system includes several spaceborne nodes interconnected via inter-satellite laser links. Each spaceborne node comprises a master control node and slave nodes. The master control node maintains a global time reference, periodically collects service status information from each slave node, performs time slot and resource allocation calculations, and sends the optical switching configuration results to the execution layer. The slave nodes perform local service access, status acquisition and reporting, time synchronization locking, and transmit optical pulses or optical data signals according to a unified time system within their allocated time slots. This system, method, and related apparatus can overcome the bottlenecks in rate, power consumption, and latency caused by traditional electrical switching and software control methods, improving the speed, parallelism, and stability of the optical switching control process, thereby increasing the resource utilization of inter-satellite optical links and the overall throughput of the system.

The application discloses a high-dynamic large-scale directional networking simulation system and method, which comprises a guide and regulation subsystem, a time system subsystem, a general excitation subsystem, an efficiency evaluation subsystem, a multi-node simulation subsystem and external physical nodes; the multi-node simulation subsystem comprises a plurality of general networking modules and member exchange devices; the external physical nodes comprise a plurality of networking devices and corresponding connected directional networking antennas. The method comprises the following steps: the guide and regulation subsystem generates a task file and uniformly issues a time system; the general excitation subsystem issues an antenna pointing direction, a frequency hopping pattern and service data in advance by one time slot; a digital exchange device completes intra-cluster, inter-cluster and virtual-real data exchange; and the efficiency evaluation subsystem collects and outputs network efficiency in real time. The application adopts digital exchange to replace a traditional radio frequency matrix, significantly reduces the cost, improves the system reliability and expandability, can truly reproduce an aerospace high-dynamic directional networking scene in a laboratory, and provides an efficient verification platform for related protocol, algorithm and chip research and development.

The invention provides high-precision timing equipment based on a rubidium clock and a constant-temperature crystal oscillator, and belongs to the technical field of time-frequency synchronization. The system comprises a main control card, a monitoring card, a time code output branching card, a frequency scale output branching card, a Beidou receiver card, a 1553B bus interface card, an NTP and a PTP time service card which are installed on a VPX backboard. The time code output shunt card supports output of various time service signals, the frequency scale output shunt card supports output of various frequency scale signals, and the 1553B bus interface card can convert the time service signals of a serial port protocol into time service signals of a 1553B bus form suitable for the fields of avionics systems and the like; the NTP time service card and the PTP time service card are provided with optical fiber communication interfaces and Ethernet communication interfaces at the same time, and optical time service and electric time service can be achieved. According to the invention, a mode of'rubidium clock + crystal oscillator 'is adopted to realize time-frequency signal output, and a series clock taming mode is adopted, so that the problem that signals with high time-keeping precision and high-index frequency cannot be met at the same time in the prior art is solved.

The invention provides a self-adaptive priority dynamic adjustment method and system for system threading interruption, and the method comprises the steps: monitoring all interrupted threads running in a real-time system, and obtaining running statistical data of all interrupted threads, the running statistical data at least comprising interruption occurrence frequency and interruption average execution time; analyzing the operation statistical data based on a pre-constructed dynamic decision model, and determining a processing mode of each interrupt thread, the processing mode being a hard interrupt mode or a threading interrupt mode; if it is determined that the processing mode of the interrupt thread is a threading interrupt mode, adjusting the priority of the interrupt thread based on a preset interrupt thread priority dynamic adjustment strategy; according to the method, different types of interrupts can be intelligently distinguished, and the situation that all interrupts are subjected to undifferentiated threading is avoided, so that the certainty of key tasks is guaranteed, meanwhile, unnecessary real-time system overhead is reduced, and the overall performance is improved.