Automatic clock calibration method and automatic clock calibration device

Abstract

The invention discloses an automatic clock calibration method and an automatic clock calibration device. The method comprises the following steps of: (A100) determining a time calibration parameter and a unit timing period by a clock according to a timing error calibration parameter; (A200) enabling the clock to normally time and generate a varying timing period parameter; (A300) judging whether the variance of the timing period parameter is equal to the time calibration parameter or not and executing the step (A400) if the variance of the timing period parameter is equal to the time calibration parameter or else executing the step (A200) if the variance of the timing period parameter is not equal to the time calibration parameter; (A400) judging the timing accuracy of the clock and executing the step (A500) if the clock is fast and executing the step (A600) if the clock is slow; (A500) reducing one timing period unit of a time value of the clock and returning to the step (A200) to re-calibrate; and (A600) increasing one timing period unit of the time value of the clock and returning to the step (A200) to re-calibrate; and (A200). The invention can be adopted to accurately calibrate the accumulative time error of the clock so as to reach the aim of high-accuracy timing with the clock.

Description

technical field [0001] The invention relates to the field of clock calibration, in particular to a clock automatic calibration method and a clock automatic calibration device. Background technique [0002] Due to the frequency error of the quartz crystal oscillator in ordinary quartz watches, at room temperature of 25°C, most of the monthly deviations of clocks and watches are 20 seconds to 30 seconds or more; and with the influence of environmental temperature changes, the monthly deviations of clocks and watches in actual use may even decrease. bigger. In order to correct the frequency error of the crystal oscillator and improve the timing accuracy of the watch, it is usually necessary to configure different capacitors for different crystal oscillators, which brings troubles to production. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] The object of the present invention is to provide a watch automatic cal...

AI Technical Summary

Problems solved by technology

It aims to solve the problem of inaccurate travel time of existing clocks and watches due to the error of the crystal oscillator itself and the influence of temperature

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