357 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.

An inspection apparatus includes multiple sensors (including a visual sensor and one or more additional sensor(s), such as an optical gas imager and an anemometer), a real-time clock, and an inertial measurement unit, the sensors having central observation axes aligned in parallel, with the sensors and real-time clock (and optionally a location module) configured to generate data points from multiple poses of the inspection apparatus relative to an observed object. A method for operating an inspection apparatus includes obtaining data by sweeping the inspection apparatus across a region in parallel paths and circumscribing the region, time-stamping and / or attributing location coordinates to the data, correcting for positional offset of the sensors, collocating visual sensor data with data from other sensor(s), generating a point cloud and a 3D texture of the visual data, and generating a textured 3D model.

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 provides a control method and device for a system chip of a vehicle, and relates to the technical field of vehicle control. The method comprises the steps that when a vehicle is not used within a first preset time range and a system chip of the vehicle is in a low-power-consumption mode or a normal shutdown mode, a microcontroller unit is awakened in response to a received first awakening signal of a real-time clock; after a second wake-up signal of the real-time clock is received, whether the system chip meets a wake-up condition is judged, and a judgment result is obtained; the first wake-up signal and the second wake-up signal are timing wake-up signals; when the judgment result is that the awakening condition is met, awakening the system chip; when the system chip meets the first preset condition, a restart signal is sent to the system chip, and the running state of the system chip is monitored; the first preset condition is that the system chip is in a low power consumption mode and the system chip meets the restart condition. According to the control method and device for the system chip of the vehicle, the safety of the vehicle can be improved.

The present invention provides a voltage detection method, device, system, electronic device, readable storage medium and chip. The voltage detection method is used in a voltage detection system. The voltage detection system includes a voltage sampling unit, a single-chip circuit, a temperature sensor circuit and a level conversion circuit. The voltage detection method includes: obtaining multi-channel isolated power supply voltage; determining at least one voltage parameter through a voltage sampling unit and an analog-to-digital converter; determining at least one time parameter according to a real-time clock; determining at least one temperature parameter according to a temperature sensor; determining a voltage detection result according to a time parameter, a temperature parameter and a voltage parameter; and transmitting the voltage detection result to a host computer through a level conversion circuit. Through the scheme of the present invention, the accuracy of multi-channel isolated power supply voltage detection is improved.

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 provides a system management method for embedded equipment, which comprises the following steps: when detecting that a microprocessor system is idle, determining whether to enter a closed mode, the closed mode being used for closing hardware except an RTC (Real Time Clock) in the microprocessor, and the closed mode being periodically awakened through the RTC; when the microprocessor system enters the closed mode, writing motion data into a backup register of the microprocessor when the microprocessor system enters the closed mode; when the microprocessor system is awakened from the off mode, environmental data in the static random access memory is updated based on the motion data in the backup register, the environmental data being used to support operation of the microprocessor system. According to the method, the RTC clock is used for periodically waking up the equipment to enter the closed mode, processing and detecting events and initiating a positioning process, so that the power consumption of the equipment is reduced to the greatest extent under the condition that the electric quantity of a battery of the embedded equipment is limited, and the requirements of low power consumption and long-time operation of a microprocessor system are met.

The invention discloses a programmable oil well mouth controller based on a 1DCNN indicator diagram recognition model and a control method thereof, and the controller comprises a processor, a data and program memory, a USB interface, a data communication interface, an RS485 bus communication interface, a real-time clock, a ZIGBEE wireless interface, an analog quantity signal input circuit, and a switching value signal input and output circuit. A sound card interface circuit and an audio power amplifier circuit; the control method comprises the steps that load data and displacement data of a wellhead of an oil well are collected in real time according to the operation cycle of the beam-pumping unit, normalization processing is conducted on the data, then interpolation processing is conducted to expand each kind of data to the standard length so as to meet the model requirement, the data are input into a trained 1DCNN network for operation, and then the data are obtained. And outputting the oil well operation condition. The system is high in reliability and convenient to expand; remote data acquisition and control can be realized, and personnel safety can be satisfied.

The invention discloses a multipath encryption wireless transmission method and system based on environmental parameters, and the method comprises the steps: obtaining a local real-time clock parameter, and carrying out the first encryption through employing the local real-time clock parameter as a first secret key; environment parameters are obtained, the real-time environment parameters are used as a second secret key, and second encryption is carried out in combination with the first secret key; after the second encryption, the encrypted data is obtained through third secret key operation under the participation of the second secret key, so that the third encryption is realized; and performing wireless transmission on the data encrypted for three times. The system is used for executing the method. The method has the advantages of being simple in principle, easy to implement, wide in application range, good in safety and the like.

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.

The utility model discloses a button cell power-saving circuit used for a real-time clock circuit. The button cell power-saving circuit comprises a power supply, a diode, an RTC chip, a power field effect transistor and a button cell. The power supply is used for providing power supply voltage for the RTC power supply loop; the anode of the diode is connected to the power supply, and the cathode is connected to the power input end of the RTC chip; the drain electrode of the power field effect transistor is connected to the power input end of the RTC chip, the source electrode is connected to the positive electrode of the button cell, and the grid electrode is connected to a power supply so as to control the conduction state of the power field effect transistor; when the power supply supplies power normally, the RTC chip obtains voltage from the power supply through the diode, at the moment, the power field effect transistor is not conducted, and the button battery does not output current; when the external power supply loses power, the voltage of the power supply is reduced to 0, the power field effect transistor is conducted, and the button cell supplies power to the RTC chip. The power consumption can be reduced, and the service life of the button cell is prolonged.

The invention provides a clock synchronization method and device, a server, a storage medium and a program product, the method is applied to the server comprising a first real-time clock and a second real-time clock, and the method comprises the following steps: under the condition that a power supply is switched on, determining the working state of the server; and when the working state is a non-starting state, taking first time information of the first real-time clock as synchronous clock information of the substrate management controller. And in response to a starting instruction of the server, obtaining second time information of the second real-time clock. And updating synchronous clock information of the baseboard management controller based on the second time information. According to the method provided by the invention, the server can realize clock information synchronization of the substrate management controller in a non-starting state, so that the server can conveniently carry out abnormality diagnosis according to the clock information, and the abnormality diagnosis and maintenance efficiency of the server is improved.

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).