Method and device for realizing high-precision time synchronization data of sensors based on single-chip microcomputer

Abstract

The invention relates to a method and a device for acquiring high-precision time synchronization data of a sensor. The device comprises a data acquisition module, a data storage module, a local timingmodule, a periodical updating module and a time stamp adding module, wherein the data acquisition module is sued for reading sensor data; the local timing module is used for generating 1ms regular interruption timing through a timer; the periodical updating module is used for receiving an external second synchronization signal and performing comparative judgement with the local timing module to update the local time; the time stamp adding module is used for adding an updated local time stamp to the sensor data acquired by the data acquisition module; and the data storage module is used for storing the data in which the time stamp is added. The method and the device have high time precision and low material cost, are simple to realize, are applied widely, can be used for scale production and have remarkable economic benefits.

Description

Technical field [0001] The invention relates to a method for acquiring high-precision time synchronization sensor data, and a device for acquiring high-precision time synchronization sensor data by adopting the method. Background technique [0002] In the production of high-precision maps, data from various sensors need to be fused. Most of the data output by sensors are real-time data. If only the original data is recorded, time correlation will be lost. Therefore, these data need to be correlated through high-precision synchronized time. [0003] The general data collection is to directly transmit sensor data to the data storage module. Since the data storage module generally runs on a Linux-based time-sharing operating system, the time of using the operating system will cause the time error to be higher than 10 milliseconds, so you need to let the sensor first The output data stream is transferred to a high-precision time synchronization device, which puts a high-precision time ...

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the problem that the cost of using FPGA for sensor data time synchronization is too high, and the time synchronization error of the general method is too large to meet the practical application. The present invention discloses a low-cost and high-precision sensor data time synchronization method, including the following steps :

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