288 results about "Real-time clock" patented technology

The invention discloses a cross-device clock correction method supporting accurate synchronization of meters, and aims to improve the data time consistency among multiple meter devices and meet the requirements of high-precision electric power measurement and event analysis. The method comprises the following steps: acquiring a network time protocol timestamp and a first sampling time sequence in a reference meter, generating a clock reference signal, and broadcasting the clock reference signal to a corrected meter; comparing the corrected meter with a local second sampling time sequence, and calculating a clock skew coarse value vector; further performing wavelet decomposition on the offset coarse value, extracting to form a drift feature vector, fusing the drift feature vector with a historical template, and calculating a unified correction parameter set by using a Bayesian recursion method; and generating a correction pulse sequence carrying a delay residual compensation code based on the parameter set, sending the correction pulse sequence to a corrected meter, calling an interpolation compensation function to construct a piecewise polynomial drift compensation table, and finally realizing dynamic correction and cross-device accurate synchronization of a local real-time clock.

A device for time-based tracking and cost optimization in construction projects, the device comprising the following: a robust housing suitable for use on construction sites; a processing unit located inside the housing, configured to perform real-time time-stamping, data acquisition and preprocessing tasks; a multimodal sensor unit that is operationally coupled with the processing unit, wherein the sensor unit comprises at least a motion sensor, an RFID reader, sensors for environmental conditions and a vision module with optical character recognition; a real-time clock module that is operationally connected to the processing unit to provide time synchronization for all sensor data streams; a wireless communication module that supports the Wi-Fi, LoRa and LTE protocols and is configured for transmitting time-stamped data to a central project server; a storage module that is operationally coupled with the processing unit to locally buffer time series data of construction activity during offline operation; a housing-mounted, touchscreen-based human-machine interface configured to allow site personnel to enter activity updates and confirm the status of construction tasks; a cost optimization engine running on the central server, the engine being configured to receive time-synchronized sensor data from multiple such devices and dynamically calculate time-cost trade-offs using a predictive planning technique that incorporates the principles of the critical path and the power value; furthermore, the device is configured to be integrated into a digital twin environment of the building under construction in order to provide real-time visualization of progress and to generate suggestions for resource reallocation based on a time-cost-benefit analysis.

The invention discloses a real-time clock calibration method, device and equipment and a medium, and relates to the technical field of electric vehicle charging time calibration, and the method comprises the steps: obtaining a clock calibration parameter based on a preset time interval; executing a compensation error calculation process based on the clock calibration parameter to obtain a compensation error; and when a sleep instruction is received and it is determined that the vehicle is not in the sleep state, the compensation error is utilized to calibrate the wake-up timestamp, and a target wake-up timestamp is obtained. The method is used for solving the problem that in the prior art, when the vehicle is in the dormant state, the vehicle cannot be normally used due to the fact that the vehicle stops for a long time or exhausts the electric quantity of the storage battery in the dormant state, the target awakening timestamp is determined when the dormant instruction is received, the dormant vehicle control unit is awakened at the target awakening timestamp, and the dormant vehicle control unit is awakened at the target awakening timestamp. Therefore, the vehicle controller controls the high-voltage system to charge the storage battery, and the problem that the vehicle cannot be normally used due to the fact that the voltage of the storage battery is lower than the critical voltage is solved.

The invention is suitable for the technical field of inverters, and provides a parallel control method for inverters, which comprises the following steps: after a plurality of inverters are powered on and a parallel operation task is started, acquiring a time base counting register EPWM count value and a real-time clock RTC time value in the plurality of inverters; and then, based on the EPWM count value and the RTC time value, determining a controller area network (CAN) communication expansion frame of each inverter. And then, according to the CAN communication expansion frame of each inverter, determining a host inverter and a plurality of slave inverters from the plurality of inverters, and allocating CAN communication addresses to the plurality of slave inverters through the host inverter. According to the method, the master-slave relationship of the inverter is determined, and the CAN communication address is automatically allocated, so that the complexity of manually allocating the addresses of the master and the slave is avoided, and the conflict of the communication address is effectively reduced.

The invention relates to an RTC clock chip frequency drift accurate modeling method and device based on GNSS clock difference data. The method comprises the following steps: receiving GNSS clock error data, reading RTC clock chip data according to a preset interval, and performing time synchronization on the RTC clock chip data by using the GNSS clock error data; in a preset time window, calculating a frequency difference value sequence according to the GNSS clock difference data and the RTC clock chip data; the GNSS clock difference data and the RTC clock chip data serve as input samples of a pre-constructed neural network model, the frequency difference value sequence serves as an output label, the neural network model is trained, and the trained neural network model is obtained; and inputting real-time RTC clock chip data into the trained neural network model, and outputting a current RTC clock chip frequency drift prediction value. By adopting the method, the frequency drift modeling precision of the RTC clock chip can be improved.

The invention provides a low-power-consumption embedded data recording system and algorithm for on-line monitoring of SF density. The system is provided with an MCU main control unit, an external independent watchdog circuit, a LoRa wireless communication module, an RS485 interface, an SF density and temperature measurement sensor, a battery power supply and voltage acquisition module and a Flash data storage and real-time clock module. Algorithms of the system comprise an intelligent data recording strategy, a dynamic sensor activation and sleep mechanism, a power failure data protection and breakpoint continuation mechanism, a multi-parameter compression coding algorithm, a dynamic sampling frequency adjustment strategy, a real-time clock synchronization and timestamp calibration mechanism, a multi-sensor fusion sensing mechanism and an ultra-low power consumption system architecture mechanism. The low-power-consumption embedded data recording system and algorithm for on-line monitoring of the SF density have the functions of multi-data change trend intelligent judgment, multi-data fusion perception judgment, ultra-low power consumption and flexible communication, and are suitable for long-term field deployment.

The invention discloses a method for solving conflict between a baseboard management controller (BMC) and a central processing unit (CPU) accessing a real-time clock (RTC), which relates to the technical field of computer firmware, and comprises the following steps: before a central processing unit (CPU) of a server accesses the RTC, a first signal representing that the CPU accesses the RTC is transmitted to the BMC through a complex programmable logic device (CPLD); the information indicating that the RTC is occupied by the CPU is notified to the BMC; after the CPU transmits the first signal representing that the CPU accesses the RTC to the BMC, the CPU accesses the RTC through a hardware link between the CPU and the RTC, wherein the hardware link is controlled by the BMC and the CPLD to be communicated with the CPU and the RTC; and before accessing the RTC, the BMC determines that the CPU is accessing the RTC according to the first signal representing that the CPU accesses the RTC, and delays accessing the RTC when determining that the CPU accesses the RTC so as to eliminate access conflicts. In the invention, the BMC and the CPU do not access the RTC at the same time, and time abnormity caused by access conflicts can be eliminated.

The present application provides a cockpit domain controller. The controller comprises an SoC and an MCU; the MCU is provided with two SPI communication channels, two CAN communication channels, a PWM channel, an I2C channel, multiple temperature ADC acquisition channels, multiple voltage monitoring and acquisition channels, and multiple GPIO control channels; the MCU is connected to the SoC by means of the two SPI communication channels and one GPIO control channel; two CAN buses are each provided with a PDCM, a PDCF, an IBC, an EPS, and a VDC; the PWM channel is provided with a fan controller; one ADC channel is connected to a voltage monitoring channel, and another ADC channel is connected to a temperature measurement channel; the I2C channel is provided with a memory, a backup loudspeaker, and a real-time clock chip. The cockpit domain controller of the present application can provide real-time and secure data interaction between the SoC and other controllers.

The invention is suitable for the technical field of electronic information, and relates to a backup battery switching circuit and switching method and a metering instrument, and the backup battery switching circuit comprises a main power supply sampling and power supply circuit, a meter reading battery sampling and power supply circuit, a clock battery power supply circuit, a first LDO circuit, a second LDO circuit, a power supply power flow control circuit and an MCU. The device is simple in structure and convenient to work, the clock battery can be switched to the low-power-consumption operation power supply of the MCU when the meter reading battery is under-voltage or is taken off to cause power failure, so that the uncovering detection function is effective, and after the meter runs for a preset time length, the clock battery is closed to provide a channel for the low-power-consumption operation of the MCU and the uncovering detection circuit, so that the uncovering detection function is improved. The electric quantity of the clock battery is effectively saved, and the influence on reliable operation of the real-time clock circuit is small.

The utility model relates to the technical field of batteries, and discloses an integrated battery management system and equipment, and the system is characterized in that a power management module receives a power signal of a target battery, and converts the power signal into a power supply signal suitable for driving a control module, a real-time clock module and a control module; the driving control module collects state information of the target battery and converts the state information into a feedback signal adapted to the control module, so that the control module generates a driving control signal of the target battery according to the feedback signal; according to the driving control signal, matched battery driving control operation at least including at least one of balance control operation and power control operation is executed on the target battery; and the real-time clock module generates clock information for indicating the control module to sleep or wake up, so that the integration degree of the battery management system can be improved, and the application flexibility and the execution efficiency of the battery management system can be improved.

The invention provides a LoRa-based high-precision real-time clock synchronization method and a LoRa-based high-precision real-time clock synchronization system, relates to the technical field of wireless communication, and aims to solve the problems that in the prior art, the clock synchronization precision is insufficient, the complex environment adaptability is poor, and the time of equipment is not synchronous due to clock drift and delay accumulation. The method comprises the following steps: a master device sends a first sending timestamp to a slave device; performing first time calibration on the slave device clock according to the first sending timestamp; after the set time calibration period, the slave device clock carries out second time calibration; and dynamically adjusting the real-time clock of the slave device, continuing to perform third time calibration by the slave device, updating the time calibration period, and circularly executing time calibration according to the updated time calibration period until the power-on is finished. According to the method, the defects in the prior art are overcome, the bidirectional synchronization protocol is provided, the delay compensation technology is combined, the time calibration period is updated, and the real-time synchronization precision of the master and slave devices is improved through multiple times of time calibration and dynamic adjustment.

The invention relates to the field of electrical measurement and electronic test equipment, and discloses a charger test method and system. The method comprises the following steps: acquiring a parameter configuration set and a baseline condition, and generating a probe and interface configuration structure under a four-wire system measurement site, protocol abstraction card mapping and shunting and Hall channel combination condition; performing unified time reference binding and event labeling table initialization, locking a time base by a real-time clock of the microcontroller unit, broadcasting the time base to a channel and a controller, executing temperature rise constrained load arrangement and synchronous acquisition, and generating an acquisition preparation packet; and electrical transient and thermal feature extraction and electrical decoupling fusion are executed, and consistency judgment, threshold comparison and report generation are completed. According to the invention, by establishing a unified time base architecture of electricity and heat dual-domain synchronization, multi-channel consistent acquisition and real-time self-diagnosis are realized, the precision, traceability and automation level of a charger test process are improved, and the method is suitable for comprehensive test and evaluation of various types of electronic equipment.

The invention relates to a cross-security-area data verification method and device, computer equipment and a storage medium. The method comprises the following steps: generating a quantum random number as a dynamic salt value, combining the dynamic salt value with to-be-verified data, and generating a first hash value through an anti-quantum hash algorithm; a quantum encryption data packet containing to-be-verified data is transmitted through the main communication channel, meanwhile, a verification message containing a second hash value of a real-time clock timestamp is transmitted through the backup communication channel, and the second hash value is generated based on the real-time clock timestamp; receiving the quantum encrypted data packet and the verification message, extracting to-be-verified data in the quantum encrypted data packet, and generating a third hash value; on the basis of an improved dynamic time warping algorithm, comparing feature vector distances of the first hash value and the second hash value; and based on the feature vector distance, verifying the data crossing the safety area. By adopting the method, the safety, the reliability and the real-time performance of cross-safety-zone data transmission of the electric power system can be improved.

The invention discloses a server clock synchronization system and method based on a BMC. The system comprises a real-time clock chip, a channel switching chip, a baseboard management controller and a server host. The real-time clock chip receives and stores BMC system time written by the baseboard management controller, maintains travel time based on the time and generates an interrupt signal through the interrupt output pin. And the channel switching chip switches an access channel to the real-time clock chip between the server host and the substrate management controller according to the level signal of the control pin. And the baseboard management controller obtains the access right by outputting the level signal, writes the BMC system time and sets the alarm clock time. And the server host responds to the interrupt signal, reads the hardware time data from the real-time clock chip and updates the system time. According to the invention, after the BMC modifies the time, the time synchronization can be completed without restarting the server host, the service interruption is effectively avoided, and the availability of a server system and the real-time performance of time management are improved.

The invention is suitable for the technical field of intelligent electric energy meters, and relates to an electric energy meter clock calibration system and method, and the system comprises an external clock module which is used for transmitting a second pulse signal to a microcontroller; the built-in clock module is used for providing real-time clock and calendar functions and automatic leap year adjustment, supporting an alarm clock and a periodic terminal, and realizing a built-in hard clock through an external crystal; the internal soft clock module is used for periodically triggering a timer terminal and synchronizing pulse per second of an external clock after accumulating a certain number of times; and the internal and external clock automatic switching module is used for switching to the internal clock module when the external clock module breaks down and synchronizing the internal soft clock module so as to ensure the accuracy of the clock. The electric energy meter clock is simple in structure and convenient to operate, and the accuracy and reliability of operation of the electric energy meter clock are effectively improved.

The invention discloses a timing control system and method for a server, and relates to the technical field of timing control, and the system comprises a power supply unit, a switch unit, a level setting unit, a substrate management control unit, a real-time clock unit, an energy storage unit and a logic control unit. The energy storage unit is used for supplying power to the real-time clock unit under the condition that the power supply unit is powered off; the real-time clock unit is used for enabling the power supply unit through the switch unit in a conducting state under the condition that the server is in a shutdown state and an alarm clock is triggered; the substrate management control unit is used for reading the clock time of the real-time clock unit after electrification, controlling the logic control unit to be electrified if the clock time of the real-time clock unit is the preset startup time, and controlling the switch unit to be switched off after the logic control unit is electrified; and the level setting unit is used for enabling the power supply unit when the switch unit is in the off state. The problem that the server cannot be automatically started in the power-off state is solved.

An apparatus for maintaining accurate timekeeping in an atomic clock during holdover is presented. The apparatus comprises data acquisition circuitry configured to store historical clock data; and receive environment data. The apparatus comprises processing circuitry configured with a predictive algorithm, the predictive algorithm configured to analyze a combination of historical clock data, environment data, and real-time clock data; and estimate a future drift in a frequency of the atomic clock at a future time point based on analysis of the combination of historical clock data, environment data, and real-time clock data. The apparatus further comprises control circuitry configured to adjust the frequency of the atomic clock based on the estimated future drift of the frequency of the atomic clock.

The invention provides a precision compensation method and device for a real-time clock of an electric energy meter. The method comprises the following steps: acquiring the current environment temperature of a to-be-measured electric energy meter; when it is determined that the current environment temperature exceeds a preset normal temperature interval, on the basis of a plurality of preset temperature correction points and compensation coefficients corresponding to the preset temperature correction points, real-time clock correction is carried out on the to-be-measured electric energy meter at the preset temperature correction points in sequence according to the temperature from low to high; wherein the compensation coefficient is obtained by performing polynomial fitting on the original temperature value reading of the sensor corresponding to the preset temperature correction point and a reference temperature value. According to the invention, error transmission during precision compensation is avoided, and the real-time clock precision of the electric energy meter is improved.

The invention discloses a server BIOS log transmission method based on function decoupling, and the method comprises the steps: a processor obtains to-be-transmitted log data and corresponding log attributes, determines the log type of the log data based on the log attributes, calls a specified real-time clock, determines the generation timestamp of the log data, and transmits the log data to a server; sending the log data to a baseboard management controller to enable the log data to carry a generation timestamp, calling a log transmission path corresponding to the log type, and sending the log data to the baseboard management controller; the baseboard management controller sorts the high-level logs and the basic logs according to the sequence of the generated timestamps from morning to evening to obtain a global log queue; mapping the log data in the global log queue into a memory through memory mapping, and backing up the log data to a flash memory; and outputting the basic logs in the global log queue to a network console according to the sequence from front to back. According to the method, the conflict between high throughput and starting timeliness in the log transmission process can be effectively solved.

Various systems and methods are presented regarding controlling access to a vehicle. Access of the vehicle, by a second device, can be controlled by a first device utilizing authentication keys, access duration, and / or generation of access confirmations and access revocations. Respective timing of operations can be based on one or more timings generated by a real-time clock located on the vehicle. Further, in the event of an access confirmation not being received from the first device at a defined time, access of the second vehicle can be revoked. Communications between the respective devices can utilize short-range wireless communications. Access to the vehicle can be via controlling a digital / electronic interface, which can be further connected to a smart key configured to control operation of a vehicle door, engine / motor, and suchlike. The first device and the second device can be portable / mobile devices (e.g., one or more cellphones).

The invention relates to the technical field of electrical variable monitoring, and discloses an electric energy quality monitoring method and device, and a medium, and the method comprises the steps: collecting a power grid voltage waveform and extracting a phase, generating a frequency fingerprint based on a phase increment sequence, carrying out the taming of a PI structure of a local real-time clock, and carrying out the group synchronization; executing a variable sampling rate strategy according to the power frequency phase, and analyzing after an event is triggered; on the condition that no external standard source exists, voltage step or transformer area voltage regulation switching in operation of a power distribution system is used as natural excitation, and gain and bias of a metering link are identified and updated on line; and performing decoupling transmission by taking the steady-state index as a state flow and the event reconstruction waveform as an event flow, and packaging and recombining the event flow by adopting recoverable ordered fragments. According to the method, the time synchronization reliability, the event integrity, the index accuracy and the transmission restorability are systematically improved, and the method is suitable for continuous monitoring and operation and maintenance of the power quality of the power distribution network.

The invention discloses a low-voltage loop latent fault real-time monitoring device, which comprises a controller, a current acquisition module, a voltage difference acquisition module, a phase voltage acquisition module, a management machine and a background master station, and is characterized in that the controller is respectively connected with the current acquisition module, the voltage difference acquisition module, the phase voltage acquisition module and the management machine, and the management machine is also connected with the background master station; the controller is further connected with a debugging network port, a B code time synchronization module, a watchdog, a wave recording storage module, a constant value storage module and an external real-time clock, the abnormal loss of the power supply loop is calculated by monitoring the electrical analog quantity of the power supply loop at the start end and the tail end of the power supply branch loop, the abnormal loss is analyzed, the ratio of inter-phase voltage and other data are analyzed, and the real-time performance of the power supply loop is improved. And the abnormal heating problem of the whole power supply branch loop is judged by measuring the electric energy loss, and an alarm is given in advance, so that the latent fault abnormal problem of the low-voltage loop is early warned before a fault occurs.

The invention relates to the technical field of wireless communication of the Internet of Things, in particular to a configuration management method of a low-power-consumption Bluetooth penetration module and a related device. According to the method, the working modes are dynamically switched according to the Bluetooth connection state. In the AT instruction configuration mode, receiving, analyzing and verifying an AT instruction through a serial communication interface; for the parameter setting instruction, immediately applying the modified parameters to the module and storing the modified parameters to the nonvolatile storage unit; in the AT instruction configuration mode, a real-time clock timer is configured by judging the idle state of the module and combining the preset task period, so that the module periodically enters the deep sleep mode until the timer is triggered and awakened, the deep sleep time of the module is prolonged to the maximum extent, the overall average power consumption is remarkably reduced, and the service life of the module is prolonged. And the cruising ability of the equipment in a battery power supply scene is greatly prolonged.

The invention discloses a clock synchronization method and device for multi-modal human factor data acquisition, edge computing equipment and a medium, which are used for improving the accuracy of data alignment. The system controls a first human factor data acquisition device to send a periodic wave signal to each second human factor data acquisition device; each human factor data acquisition device carries out sampling according to the periodic wave signal; a human factor data receiving end in the system receives data packets sent by each human factor data acquisition device, and each data packet carries a packet number; determining absolute time corresponding to each data packet according to the packet number carried by each data packet; and performing data alignment processing on each data packet according to the absolute time corresponding to each data packet. According to the invention, since the data acquisition devices all take the moment of sending the periodic wave signals as the starting moment of data acquisition, a local real-time clock crystal oscillator is not needed, so that strict synchronization of data acquisition is realized, and the problem of data asynchronization caused by clock drift between the devices is eliminated.

The invention provides a clock power failure compensation method and device, refrigeration equipment and a computer storage medium, and belongs to the technical field of refrigeration equipment. The clock compensation duration corresponding to the actual temperature difference between the power failure moment and the power recovery moment of the refrigeration equipment is determined; and performing missed timing compensation on a real-time clock of a temperature controller of the refrigeration equipment through the clock compensation duration. The power failure duration of the real-time clock can be predicted without depending on external equipment after power failure, and the real-time clock can be compensated.

The present application belongs to the technical field of distributed cooperative control system, and discloses a multi-point high-precision cooperative ignition system for firework display, comprising: a central controller which non-timely distributes delay time stamps to a plurality of distributed ignition modules and broadcasts a content-neutral synchronization event at a starting moment; the distributed ignition module starts a local timer upon detecting the synchronization event and autonomously counts down according to the pre-stored delay time stamp to execute ignition, the present application decentralizes intelligent time decision to the terminal, avoids the interference of signal physical transmission delay on the overall ignition precision of the system, and replaces the complex real-time clock synchronization and delay compensation mechanism in the traditional control system, so that the architecture simplifies the physical design and deployment complexity of the system, and improves the synchronization robustness and scalability when a large number of nodes work cooperatively.

The utility model provides a water and electricity double-control telemetering terminal. The water and electricity double-control telemetering terminal comprises a meter shell, a temperature compensation module, an anti-theft processing module, a positioning module and a real-time clock are arranged in the meter shell, and the water and electricity double-control telemetering terminal further comprises an electric energy metering module and a remote control module, the controller is configured to calculate a conversion coefficient based on the electricity consumption and the water consumption when the flow meter operates normally, and convert the electricity consumption of the equipment based on the conversion coefficient to obtain the water consumption, so that the working reliability of the system is improved, and theft prevention and water stealing prevention are assisted; the power supply module comprises a lithium battery and a solar panel; the communication module is used for remote communication between the controller and a management center; the data interface is used for carrying out data transmission and communication with external equipment; and the man-machine interface equipment is used for providing an interface for interaction between a user and the equipment. Scientific management and reasonable distribution of water resources can be achieved, the irrigation efficiency is improved, and waste of the water resources is reduced.

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a real-time robotics control framework that implements a real-time clock with transferable ownership. One of the systems being configured to operate a real-time control loop for a robot in multiple modes include a base mode and an augmented mode, wherein when operating the robot in the base mode, the system is configured to operate a base real-time control loop in which a start of each tick of the base real-time control loop is initiated by a real-time software control module, and wherein when operating the robot in the augmented mode, the system is configured to operate multiple real-time control loops comprising the base real-time control loop and a robot real-time control loop in which a start of each tick of the real-time control loop is initiated by the real-time software drive module.

The utility model discloses a device for testing power frequency discharge of a lightning protection voltage limiter, which comprises a data acquisition circuit and a microcontroller MCU, an input end of the data acquisition circuit is connected with the lightning protection voltage limiter to be tested, a first output end of the data acquisition circuit is connected with the microcontroller MCU through an analog-to-digital conversion circuit, and a second output end of the data acquisition circuit is connected with the microcontroller MCU through an analog-to-digital conversion circuit. The second output end of the data acquisition circuit is connected with the data storage circuit through the real-time clock circuit, and the output end of the data storage circuit is connected with the microcontroller MCU. The device is simple in structure, low in manufacturing cost, and strong in anti-interference capability, can meet the test requirements of high voltage and large current in a high voltage test, and can effectively test the power frequency follow current interruption capability of a lightning protection voltage limiter of an electric power system.

An open-cover detection circuit integrated in the MCU and an electric energy meter control chip are independently powered by the electric energy storage device of the electric meter. The real-time clock module and other modules can operate with low power consumption. Its power is low, ensuring that when the alternating current is cut off and only the electric energy storage device supplies power, the open-cover detection of the electric meter can still be carried out through the open-cover detection circuit of the MCU. In addition, the above method and circuit detect the change in the level state of the switch detection pin and determine whether there is an open-cover or close-cover event according to a preset rule. Setting the preset rule can avoid the mis-triggering of the interference signal on the switch detection pin, record the wrong open-cover or close-cover event, and improve the accuracy of open-cover detection.