62results about How to "Improve time accuracy" patented technology

Disclosed are a wireless communication apparatus and a time synchronization method performed thereby.

The invention relates to the field of smart meters, and specifically relates to a smart meter RTC timing precision correction circuit and a method thereof. The circuit comprises a 12-bit ADC temperature detection module, a precision error calculation module, a compensation value calculation module and a second pulse generation module. The method comprises the following steps: screening out a crystal oscillator; fitting a curve; calculating the error of the crystal oscillator; calculating the compensation value; working out the pulse compensation cycle according to the compensation value; defining the accumulative error; and adjusting a counter according to the accumulative error and the pulse number corresponding to the compensation cycle, wherein the counter stops counting for one beat if the error of the crystal oscillator is positive and the clock frequency is quicker, and the counter adds 2 to the number if the error of the crystal oscillator is negative and the clock frequency is slower. Through the correction method of the invention, a precise second pulse can be obtained, there is no need for a large amount of stored data, the memory is saved, power consumption is reduced, the timing precision is improved, and the influence of temperature on the timing precision is reduced.

A timing signal generation device includes: an output terminal that outputs a standard signal; a first standard signal generation unit that generates a first standard signal based on a reference signal input from outside; a second standard signal generation unit that generates a second standard signal based on a signal output from an oscillator; and a control unit that switches the standard signal output from the output terminal from the first standard signal to the second standard signal based on prior information indicating that accuracy of the reference signal deteriorates.

The invention provides an automatic forward/reverse direction IRIG-B code decoding method. According to the method, a high precision oscillator clock module provides clocks for all modules, and clock precision is improved with the time filtering compensation algorithm; the direction of an IRIG-B code is identified through an IRIG-B code direction identifying module, the IRIG-B code is then converted into a required IRIG-B code, so that a forward direction IRIG-B code is provided for an IRIG-B code punctual edge identifying module; the IRIG-B code punctual edge identifying module extracts the punctual edge of the IRIG-B code, and a timestamp is provided for an IRIG-B information code identifying module, a pulse-per-second module and a serial port message module; time information is provided for the serial port message module by the IRIG-B information code identifying module; the pulse-per-second module outputs pulse-per-second signals and can provide the pulse-per-second clock synchronization service for clock synchronization equipment; the serial port message module outputs serial port messages and can provide the serial port clock synchronization service for the clock synchronization equipment. According to the automatic forward/reverse direction IRIG-B code decoding method, output time information is high in accuracy, light in fluctuation and good in long-term stability.

The invention provides an optimization method of software timers. The method includes the steps that a first timer array and a second timer array are created; total run time is defined and recorded as T1, time required for overtime processing of all timer instance objects at every moment is recorded as T2, and T1 and T2 are initialized to be zero; after waiting for a time slice, 1 is added to the total run time T1, and obtained time is recorded as T1'; the timer instance objects are added to chain table array elements of the first timer array according to chain table index numbers, overtime of the timer instance objects is detected, overtime T3 is recorded, and an index moment is generated; the timer instance objects corresponding to the index moment are added to chain table array elements of the second timer array according to the index moment; an overtime callback handler function is executed in the second timer array in a loop mode, and then the corresponding timer instance object is deleted until all the timer instance objects are executed. According to the method, operation efficiency of the timer instance objects is improved, the occupancy rate of a CPU is greatly reduced, time drift compensation is conducted on the timers, and timing accuracy of the timers is improved.

The invention discloses a priority-based embedded equipment time service method, which comprises the steps of: setting a GPS time service priority to be P1, a GSM time service priority to be P2 and NTP time service priority to be P3; initiating operation in the three time service modes when embedded equipment boots up, and storing current UTC time into an embedded RTC chip when any of the time service modes obtains UTC time in a prioritized manner as long as the RTC chip is not subjected to a time service action by means of a time service method with a higher priority; and stopping the acquisition of time service data immediately for a time service request with a low priority if a time service source obtains the UTC time by means of a time service source with a higher priority, and stopping the whole time service strategy after the time service source with the higher priority obtains the time. The priority-based embedded equipment time service method enables the embedded equipment to obtain the time service time with the highest time accuracy degree quickly after booting, is conductive to maintaining synchronization of mutual communication between the Internet of Things equipment, and provides a reliable time basis for the event recording of the equipment.

The invention discloses a Beidou satellite timing system and method. By the adoption of the Beidou satellite timing system and method, Beidou satellite time signals can be read and stably displayed in real time through an LED dot-matrix display screen, and network time synchronization is conducted on network devices in a wireless network. According to the Beidou satellite timing system and method, a satellite navigation message is received through a Beidou navigation module and a GPS navigation module, whether locating conducted by the Beidou navigation module succeeds or not is judged through a field-programmable gate array module, and universal time is extracted, converted and displayed by the LED dot-matrix display screen; a micro control unit judges whether a network timing requirement or a dot-matrix brightness adjustment request is received or not; if yes, time information is added to a network time protocol transmitted in the wireless network for network time synchronization or brightness is adjusted by adjusting the gate time of a dot matrix, and if not, judgment continues. The Beidou satellite timing system and method achieve LED dot-matrix display of time service and the network time synchronization function and are wide in application range, and the stability of the system is high.

The invention belongs to the technical field of multimedia, particularly relates to a system and a method capable of regularly recording TV programmes. The system capable of regularly recording the TV programmes comprises a system peripheral interface, a display unit, a time system, a signal tuner, a controller and a user preset information management unit, wherein the system peripheral interface is connected to the controller and is used for setting appointment recording information for a user, the display unit is connected to the controller and is used for displaying prompt information for the system, the time system is connected to the controller and is used for managing time for the whole system, the signal tuner is connected to the controller and is used for carrying out code stream, packaging and shunting for programme signals and finishing tuning for the signals, the controller is used for controlling operations of the user and coordinating the operations for other modules, the user preset information management unit is connected to the controller and is used for managing the appointment recording information set by the user and obtaining current time in the system and monitoring time for recording the programmes. The invention has the beneficial effects that: time accuracy for a timing recording function can be improved, and a problem of mutually-exclusive use for TV resources caused by switching of a function state can be avoided.

The invention discloses a visible light heat reflection temperature measuring device. The device comprises an illumination light path used for providing an illumination pulse signal for a to-be-measured sample, a sample excitation module used for applying excitation pulse signals to the to-be-measured sample, an imaging module used for capturing illumination pulse reflection signals reflected by the to-be-measured sample and acquiring a thermal process image of the to-be-measured sample under the excitation of the excitation pulse signals, wherein the imaging module captures the illumination pulse reflection signals corresponding to the same phases of the excitation pulse signals within the same exposure period; and the phases of the excitation pulse signals corresponding to the illumination pulse reflection signals captured by the imaging module in different exposure periods are different. The thermal process image of a semiconductor device can be realized through the visible light thermal reflection temperature measuring device; and the preset duration is shortened, and the preset phase difference between the illumination pulse signals and the excitation pulse signals is reduced, so that the time precision of the thermal imaging process is improved, and the time resolution is greatly improved.

The invention discloses a data interaction system and method for hospital medical insurance limit distribution. A hospital office server of a certain hospital information system sends a medical insurance quota distribution request containing a unique code of a hospital to a corresponding private cloud server, the private cloud server uploads the medical insurance quota distribution request to a public cloud server, and the public cloud server sends the medical insurance quota distribution request to a medical insurance center server; and the medical insurance center server calculates the social insurance limit allocation quota of the current hospital according to the medical insurance limit allocation request, and sends the calculated medical insurance limit allocation quota to the corresponding hospital office server through the public cloud server and the private cloud server in sequence.

The invention provides an onsite time test device based on the satellite common-view technology and a method. Through satellite common-view with an upper level standard clock, the accurate device time is acquired, taking the accurate device time as reference, accuracy of the onsite time of a tested device is measured. Compared with the prior art, an error of the satellite time because of a multi-path effect is eliminated, measurement accuracy is improved, and integrity of a tracing link is further guaranteed. The device comprises a device clock module used for determining the time of an onsite time test device, a satellite common-view module used for receiving a satellite signal and generating a test device common-view file, a communication module used for receiving a standard clock common-view file sent by the standard clock, a calibration module used for comparing the result calibration device time according to the common-view file, a test interface used for receiving a tested time signal, a test module used for measuring a difference value of the time of the tested device and the standard time, and a display and storage module used for storing the result and displaying the result in real time.

The invention discloses high-stability combined region time service frequency generation equipment and aims to provide time service frequency generation equipment with high reliability, high length stability and a wide application range. The invention adopts the technical scheme that a receiving switching unit inputs two paths of selected satellite second signals from different sources into a locking unit to carry out frequency locking, two paths of phase-locked standard frequency signals generated by the locking unit and are respectively output to a signal processing unit A and a signal processing unit B; one path of satellite second signal is also used for carrying out frequency correction on a rubidium clock connected in parallel between a three-selection two-open device and a first analog phase-locked loop PLL_A, and one path of standard frequency signal is generated and transmitted to a signal processing unit C; and the signal processing units carry out signal shaping, amplification, shunting and coding on three paths of standard frequency signals from different sources, the obtained signals are subjected to frequency division, output to a far-end time service unit and are converted into optical signals by an optical-electrical converter, and the optical signals are transmitted to an equipment machine room by one or multiple paths of optical fibers and then are converted into electric signals, and the electric signals are transmitted by an antenna so as to complete a clock time service of a receiving end.

The invention relates to a detection and sensing device used for timing of motor racing. The detection and sensing device comprises an excitation unit, vehicle units, a receiving and forwarding unit and a computer which are successively connected, wherein each vehicle unit comprises a reception and trigger circuit, an ID code transmission control unit and a RF transmitting circuit which are successively connected, the reception and trigger circuit is connected with the excitation unit, and the RF transmitting circuit is connected with the receiving and forwarding unit. The receiving and forwarding unit generates a trigger signal after excitation by electromagnetic waves transmitted by the excitation unit; the trigger signal triggers the ID code transmission control unit; the inherent ID code of each vehicle unit is transmitted to the receiving and forwarding unit via the RF transmitting circuit; the receiving and forwarding unit forwards the received ID code to the computer; and the computer stores the time value of a current moment and the ID code into corresponding forms in a database. Compared with the prior art, the detection and sensing device provided by the invention has the advantages of improved reliability and accuracy, etc.

The invention provides a timing method and apparatus. The method comprises steps of counting a basic clock via Gray codes to acquire Gray code counts and output the same, and conducting phase shift to lowest order output in the Gray code counts to achieve an m way sub-clock. A phase shift (phi) between each way sub-clock and the lowest order output meets a formula of (phi)=n x a and phi does not equal 90 degrees; 180 degrees can be exactly divided by a; n is an integer and greater than zero and less than (180-degree/a); if 90 degrees can be exactly divided by a, m=180/a-2; if 90 degrees cannot be exactly divided by a, m=180/a-1; when a preset event happens, a timing result for the preset event can be achieved via the Gray code count output value, m way sub-clock output, a period of the basic clock and a; therefore, counting unit numbers can be reduced; time hopping can be avoided for m way sub-clock output and Gray code count output, so timing accuracy is improved.

The invention pertains to a method for detecting a tag (100) in an area monitored by one or more beacons (200), the tag (100) comprising a magnetic induction module (121) and a transmitter (140), the method comprising the following steps at said tag: receiving, by means of said magnetic induction module, a first beacon message as variations in a magnetic field, said first beacon message comprising beacon information; extracting said beacon information from said first beacon message; and conditionally on said beacon information, transmitting a localisation message by means of said transmitter (140).

The invention relates to the technical field of pipe processing, and particularly discloses a pipe raw material mixing system which comprises a PLC, an auxiliary material mixing module and a raw material multi-stage mixing module, the auxiliary material mixing module comprises an auxiliary material mixing device and a raw material storage device, and the auxiliary material mixing device comprises a stirrer and a plurality of auxiliary material bins; a discharge port of each auxiliary material bin is communicated with a feed port of the stirrer, a discharge port of the stirrer is communicated with a feed port of the raw material storage device, and a discharge port of the raw material storage device is communicated with the raw material multi-stage mixing module; automatic metering scales are arranged on the two sides of each auxiliary material bin, and the PLC is used for controlling the automatic metering scales to weigh the auxiliary materials. By adopting the technical scheme provided by the invention, the problems that in the prior art, various auxiliary materials cannot be directly premixed, the auxiliary materials are easily mixed unevenly and the mixing efficiency is low due to manual mixing can be solved. The pipe mixing device is mainly used for mixing pipe raw materials.

The embodiment of the invention provides a digital clock realization device and a digital clock realization method. the digital clock realization device comprises an oscillator, a processor and a display, wherein the oscillator is used for generating clock signals and outputting the clock signals to the processor; the processor is used for carrying out counting according to the clock signals, generating time information and outputting the time information to the display; and the display is used for carrying out time display according to the time information. The clock signals generated by the oscillator serve as the working time sequence of the processor and the time information source, the time information is thus determined, and finally, the time information is displayed through the display. Through the embodiment of the invention, influences on time sequence signals due to adoption of multiple separate TTL digital circuits and temperature drift can be avoided, and the timing accuracy is thus improved.

The invention discloses a sand grain simulation ball with an automatic timing function and a simulation timing method. The simulation ball comprises a hollow simulation ball body, a water feed pipe, a pressure sensor, a timer and a data interface. The simulation ball body is provided with a first hole and a second hole. The center of the first hole, the center of the second hole and the sphere center of the simulation ball form a straight line. The water feed pipe is arranged in the first hole. The end, away from the simulation ball body, of the first hole is provided with a sealing device. One end of the water feed pipe is connected with the pressure sensor. The pressure sensor is connected with the data interface through the timer. The data interface is arranged in the second hole. The end, away from the center of the simulation ball body, of the second hole is plugged through a rubber plug. According to the sand grain simulation ball, automatic timing of the process that the sand grain simulation ball is released and runs out of a flushing pit is achieved, and the problems that that the manual timing is large in workload and error are solved; once the simulation ball is released, automatic timing can be conducted by triggering the timer through the pressure sensor, and the initial timing error caused by manual release is reduced.

The invention relates to a rapid high-precision synchronization method for satellite time service, which is composed of a GPS/BD module, a microprocessor and a power supply module; the power supply module is respectively connected with the GPS/BD module and the microprocessor, and the microprocessor is connected with the GPS/BD module. When the timer 1 is interrupted, GPS data is analyzed, UTC time is obtained, and IsGPS _ Time is set; and when the INT interrupt service is entered, the read count value of the timer 0 and Tcount 0 are used for calculating the time length Tpps, and if corresponding conditions are met, the GPS UTC time is sent to a corresponding unit of the RTC, and meanwhile millisecond and microsecond of the RTC are reset. The method has the advantages that other auxiliaryequipment does not need to be added, time service operation is achieved per second, and the application effect of being rapid and high in precision is achieved.

The invention discloses an electronic price tag reservation brushing method and device, and a computer storage medium, and the method comprises the steps: obtaining a display time parameter through receiving a push picture which is transmitted by a server and carries the display time parameter, and returning response information to the server; judging whether the display mode of the pushed picture is appointment display or real-time display according to the display time parameter; sending the identification information carrying the display mode and the push picture to a corresponding electronic price tag according to the judged display mode, so that the electronic price tag stores the push picture according to the identification information; meanwhile, when the display mode is appointment display, enabling the base station to start an appointment brushing timer; and when the timer reaches the time corresponding to the display time parameter, enabling the base station to send prompt information to a corresponding electronic price tag based on a broadcast gateway, prompting the electronic price tag to update and displaying the push picture. The time accuracy of booking picture refreshing is improved, and the time error of booking picture refreshing is reduced.

The invention provides an electronic kitchen timer. The electronic kitchen timer is characterized by comprising a 6V DC power source, a mono-stable timing circuit, a start circuit, a buzzer and a state indication circuit, wherein models of the mono-stable timing circuit and a time-base circuit IC1 of the start circuit are NE555. An electronic mode is advantaged in that timing accuracy is high, and alarm sound is load, disadvantages of the electronic mode are that cells are utilized for power supply, and operation during use is not concise enough. For solving practical problems of the electronic mode, one time-base circuit is taken as a core element, the time-base circuit is made to be a mono-stable circuit, periphery utilizes a few of components, and operation rapidness is realized.