Equipment clock calibration method, device and system, and self-calibration method and equipment

Abstract

The invention discloses an equipment clock calibration method, an equipment clock calibration device, an equipment clock calibration system, a self-calibration method and self-calibration equipment. The equipment clock calibration equipment comprises a TSXO and a WIFI module. The equipment clock calibration method comprises the steps of: eliminating built-in frequency offset of the TSXO by means of the WIFI module; and calibrating the temperature drift of the TSXO. Through adopting the equipment clock calibration method, a clock scheme with a positioning function, which is relatively low in cost and relatively high in precision, can be provided for the universal connection equipment.

Description

Technical field [0001] The present invention relates to the field of clock calibration of smart devices, and in particular to a method, device and system, self-calibration method and equipment of a device clock. Background technique [0002] In today's society, mobile communication mobile phone products and Internet of Things technology are booming, and the development of the Internet of Things cannot do without intelligent positioning technology. Currently, global positioning modules (Global Positioning System, referred to as GPS) are mostly used for intelligent positioning. Pan-connected devices for mobile communications, such as mobile phones and computers, generally have their own mobile connectivity module (Connectivity) and global positioning module (Global Positioning System, GPS for short). The mobile connection module may include a Bluetooth module (BlueTooth, BT for short) or a wireless network connection (Wireless-Fidelity, WIFI for short) module. [0003] For GPS modul...

AI Technical Summary

Problems solved by technology

Compared with VC-TCXO / TCXO, the cost of DCXO is lower, but since DCXO itself has no frequency adjustment mechanism, it needs to solve static and dynamic frequency errors. Static errors can generally be adjusted through the calibration process, but dynamic errors, that is, with temperature The changing frequency drift is difficult to solve, especially it is difficult to accurately obtain the real-time frequency deviation corresponding to the current temperature, which leads to the situation that the client device cannot locate the satellite due to the large frequency deviation at very high temperature, which cannot meet the requirements of GPS.

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