Clock synchronization method and device applied to vehicle-borne terminal

A clock synchronization and vehicle-mounted terminal technology, applied to clocks driven by synchronous motors, synchronization, radio-controlled timers, etc., can solve the problems of time and actual time deviation, large deviation, and time information deviation.

Active Publication Date: 2016-06-22
NEW SINGULARITY INT TECHN DEV
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Problems solved by technology

[0004] However, the inventor found in the research process of the present application that the time information output by the RTC in the vehicle-mounted terminal sometimes deviates, and, as the use time prolongs, the time information output by the RTC tends to deviate more and more from the actual time. The larger the value, the greater the deviation between the time obtained by the MCU and the actual time

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  • Clock synchronization method and device applied to vehicle-borne terminal
  • Clock synchronization method and device applied to vehicle-borne terminal
  • Clock synchronization method and device applied to vehicle-borne terminal

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Embodiment Construction

[0053] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0054] In order to solve the problem in the prior art that there is a large deviation between the time acquired by the micro control unit MCU installed in the vehicle terminal and the actual time, the application discloses a clock synchronization method and device applied to the vehicle terminal, and , the clock synchronization method and device applied to the vehicle-mounted terminal are applie...

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Abstract

The present invention discloses a clock synchronization method and device applied to a vehicle-borne terminal. The method and the device are applied to the MCU arranged in the vehicle-borne terminal. Through the method and the device, the MCU receives the message data transmitted by a CAN bus, the message data is analyzed, the first time comprised in the message data is obtained, the first time and the second time stored by an RTC are compared, and when the first time and the second time are different, the time stored by the RTC is adjusted to the first time. Through the invention, the adjustment of the RTC by the MCU is realized, the time stored by the RTC after adjustment is the first time, the first time is the time generated by the terminal arranged in the vehicle, thus the time obtained by the MCU is consistent with other terminals arranged in the vehicle, and the problem of a large deviation between the time obtained by the MCU and an actual time in the prior art is solved.

Description

technical field [0001] The present invention relates to the technical field of time synchronization, in particular to a clock synchronization method and device applied to vehicle-mounted terminals. Background technique [0002] The vehicle-mounted terminal is a device used for vehicle monitoring and management. It is generally installed in various vehicles. It integrates multiple functions such as positioning, communication, and driving records. It can play the role of dispatching and monitoring vehicles, and has a wide range of applications. . [0003] Wherein, the core component of the vehicle-mounted terminal is an MCU (MicroControl Unit, micro-control unit), and the vehicle-mounted terminal is also provided with an RTC (Real-Time Clock, real-time clock). The RTC can generate time information according to the oscillation frequency, and transmit the time information to the MCU, so that the MCU can obtain the current time according to the received time information. [000...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04G7/00G04R20/02H04J3/06
Inventor 邵起明郑明吉冯志亮贡兴付世茹
Owner NEW SINGULARITY INT TECHN DEV
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