Embedded type Linux based data storage method for electric energy data acquire terminal

Abstract

The invention discloses an embedded type Linux based data storage method for an electric energy data acquire terminal by using a memory mapping file to store data. The data needed to be read-written is mapped to a user process space through an memory mapping function mmap (Linux system call), and the stored data is accessed in the manner of reading and writing the memory, so that the data storage method has the advantages of data solidification and data storage, without losing data in power failure, convenience in reading and writing, excellent property, cost reduction and the like.

Description

technical field [0001] The invention relates to the field of a smart grid power consumption information collection system, in particular to a method for storing data in a power consumption information collection terminal based on embedded Linux. Background technique [0002] The power user electricity energy data acquire system is a system for collecting, processing and real-time monitoring of electricity consumption information of power users, realizing automatic collection of electricity consumption information, abnormal measurement monitoring, power quality monitoring, power consumption analysis and management, Relevant information release, distributed energy monitoring, information interaction of intelligent electrical equipment and other functions. [0003] The electricity energy data acquire terminal (electric energy data acquire terminal) is a device for collecting electricity information at each information collection point, referred to as the acquisition terminal. ...

AI Technical Summary

Problems solved by technology

Storing data in files can avoid data loss caused by system power outages, but the operation of reading and writing files is cumbersome, and the data cannot be accessed in the form of operating bytes, which is inconvenient to use, and the performance of frequent reading and writing files is limited, especially in the repetition of large files , random read and write

[0007] 2. Increase the hardware SRAM (memory will not be lost when power is turned off), and the data can be accessed in the form of operating bytes, but additional power supply is required. The general design life of the onboard lithium battery of the acquisition terminal is 5 years. Self-discharge and batch quality problems cause SRAM power supply battery failure, resulting in data loss, and increased hardware means increased costs

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