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A method for calibrating time equipment time of vehicle-mounted equipment

A calibration method and technology for in-vehicle equipment, applied in radio-controlled timers, instruments, etc., can solve problems such as slow communication rate, illegal modification of clocks, and inability to perform server time calibration, so as to reduce time consumption and improve work efficiency. Effect

Active Publication Date: 2020-04-28
JIQI CHENGDU TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0002] Today's embedded system time calibration methods mainly include: server time calibration, GPS time calibration and other calibration methods; when the device cannot be connected to the server, such as: GPRS / 3G / 4G signal is weak, the server is abnormal, etc., the server time calibration method will not work ; When the GPS signal is weak and the ephemeris cannot be obtained, the GPS time calibration method will not be able to be carried out; the embedded system mainly uses external RTC chips or internal RTC modules for timing, but external RTC chips generally use I2C for communication, and its communication rate is relatively low. Slow, which has great disadvantages for scenarios that require frequent reading of the current time; the internal RTC clock is easily modified illegally due to array out-of-bounds, code exceptions, etc., and its stability is poor

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  • A method for calibrating time equipment time of vehicle-mounted equipment

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Embodiment Construction

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0014] see figure 1 , the present invention provides a technical solution: the present invention provides the following technical solution: a time calibration method for vehicle-mounted equipment, using internal RTC and external RTC for simultaneous timing, and a combination of server and GPS time calibration methods for vehicle-mounted equipment. Device time calibration method; the calibration methods are:

[0015] A. Power-on clock calibration: adopt the ti...

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Abstract

The invention discloses a method for calibrating the time equipment of a vehicle-mounted device. The invention adopts an internal RTC and an external RTC for timing at the same time, and the combination of a server and a GPS time calibration method can provide uninterrupted clock support for the vehicle-mounted device; all applications of the invention are passed through the internal The RTC time obtains the current time, which greatly reduces the time consumption of communication between the CPU and the external RTC clock, and greatly improves work efficiency.

Description

technical field [0001] The invention relates to the technical field of time calibration, in particular to a time calibration method for a time device of a vehicle-mounted device. Background technique [0002] Today's embedded system time calibration methods mainly include: server time calibration, GPS time calibration and other calibration methods; when the device cannot be connected to the server, such as: GPRS / 3G / 4G signal is weak, the server is abnormal, etc., the server time calibration method will not work ; When the GPS signal is weak and the ephemeris cannot be obtained, the GPS time calibration method will not be able to be carried out; the embedded system mainly uses external RTC chips or internal RTC modules for timing, but external RTC chips generally use I2C for communication, and its communication rate is relatively low. Slow, which is a big disadvantage for the scene that needs to read the current time frequently; the internal RTC clock is easy to be illegally ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04R20/04G04R40/06
CPCG04R20/04G04R40/06
Inventor 吕翔梁有超石甫
Owner JIQI CHENGDU TECH CO LTD