Calibration method, device and system for equipment clock, self-calibration method and device

Abstract

A method, device and system for calibrating an equipment clock, a self-calibrating method and equipment, the equipment includes a TSXO and a GPS module, and the GPS module includes a signal receiver; the method for calibrating the equipment clock includes: through the GPS module eliminating the self-contained frequency offset of the TSXO; and calibrating the temperature drift of the TSXO. Through this method, a low-cost and high-precision clock solution with a built-in positioning function can be provided for ubiquitous connected devices.

Description

technical field [0001] The present invention relates to the field of clock calibration of smart devices, in particular to a device clock calibration method, device and system, self-calibration method and equipment. Background technique [0002] In today's society, mobile phone products and Internet of Things technology are developing vigorously, and the development of Internet of Things is inseparable from intelligent positioning technology. At present, Global Positioning System (GPS) modules are mostly used for intelligent positioning. Pan-connected devices for mobile communications, such as mobile phones, computers, etc., generally have their own mobile connectivity modules (Connectivity) and GPS modules. Wherein, the mobile connection module may include a Bluetooth module (BlueTooth, BT for short) or a wireless network connection module (Wireless-Fidelity, Wi-Fi for short). [0003] For the GPS module, there are generally two clock sources: one is that it has a temperatu...

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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