A method and system for synchronous acquisition of remote data based on periodic pulse signals

Abstract

The invention discloses a periodical pulse signal-based different place data synchronous acquisition method and a periodical pulse signal-based different place data synchronous acquisition system. The method provides different place time synchronization of microsecond-grade precision for a middle and low speed data sampling process. The method comprises the following steps: step 101), a data sampling clock is set as a counting source for a counter, the periodical pulse signal is set as a reading trigger signal for the counter, and a periodical pulse is set as a trigger signal for a sampling action in sampling process of a data collecting and recording unit; step 102), the data sampling process is started by a first periodical pulse signal and the counter is started to count; step 103), absolute time t0 corresponding to the time when the first periodical pulse signal triggers the counter to start counting is recorded, and sampling data of the data collecting and recording unit and a reading value sequence (c1, c2...cm, cm+1...) of the counter are continuously recorded according to set sampling frequency, wherein the reading value sequence (c1, c2...cm, cm+1...) of the counter is shown when each periodical pulse signal triggers the counter; step 104), the sampling data are subjected to time calibrating operation, and data sampling process synchronization is finished.

Description

technical field [0001] The invention belongs to the field of signal acquisition and processing, and in particular relates to a method and system for synchronous acquisition of remote data based on periodic pulse signals. Background technique [0002] As a basic means of obtaining information, data sampling is the basis of various test measurements or scientific experiments. In order to obtain as comprehensive information as possible, multi-sensor or even distributed sensor networks are often used for measurements. In order to effectively integrate the information acquired by the sensor network, it is often necessary for the sensors to perform synchronous data sampling. For sensor groups with physical connection conditions, synchronous sampling can be performed through the control of various clock buses. For distributed systems that do not have the possibility of physical connection, their respective clock systems need to be aligned with a common clock source. This common ...

AI Technical Summary

Problems solved by technology

Its disadvantage is that an independent clock synchronization unit is required, and the acquisition system can be connected to an external clock and replace the local sampling bus clock

This puts forward certain requirements on equipment conditions, and also increases the complexity and cost of the system

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