Method and device for calibrating time

Abstract

The invention discloses a method and a device for calibrating time, wherein the time-calibrating method comprises the following steps that: the time-calibrating device establishes a communication link with a network terminal through a USB interface protocol, acquires and saves standard time from a time server through the network terminal; the time-calibrating device updates the standard time to keep the standard time synchronous with the time of the time server; the time-calibrating device establishes the communication link with calibrated equipment through the USB interface protocol; and the calibrated equipment updates the internal time thereof according to the read standard time. The invention has the advantage that the internal time of the calibrated equipment is synchronized with the time of the time server, and a proposal for calibrating an internal clock of the equipment is easy to implement, is not limited by regions, and is economical and effective.

Description

technical field [0001] The invention relates to communication technology, in particular to a time calibration method and device. Background technique [0002] The internal clock signal of the device is an important factor for the normal operation of the device. For example, some functional modules in the device need the internal clock signal of the device to work normally. In the communication between devices, the clock signals of each device must be consistent to ensure the communication quality. Therefore, in general The internal clock of the lower device must be consistent with the standard time. However, due to the difference in the quality of the internal clock of the device, after the device has been working for a period of time, the internal clock of the device will deviate from the standard time due to the accumulation of time, which may cause many applications to fail to launch normally. Therefore, when the device's internal clock is inaccurate, it must be calibrat...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is: not only troublesome operation, but also difficult to ensure the accuracy of the internal clock

Although the above method can be used to accurately calibrate the internal clock of the device, the disadvantage of this method is: for some devices that are used indoors, when the device cannot receive GPS signals, the calibration function of the internal clock of the device will not be realized; Moreover, the GPS receiver is expensive. When the GPS receiver fails, the entire device needs to be repaired, which not only delays the normal operation of the device, but also virtually increases the maintenance cost of the device manufacturer.

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