Power failure data protection device of real-time control system

Abstract

The invention provides a power failure data protection device of a real-time control system. The power failure data protection device comprises a power module, a power failure detection module, a main controller and a storage, wherein the power module adopts 220V alternating current for inputting; after the current is processed by a transformer, a rectifier and a voltage stabilizer, work voltage is provided to the main controller and the storage; a plurality of storage elements which are arranged in parallel are also arranged on the power module, are charged with power when power does not fail, supply power to the main controller and the storage when power fails, and are used for storing real-time running data when power fails; the main controller is used for receiving a detection result signal output by the power failure detection module, executing an interrupt program on the basis of a power-off state input by the 220V alternating current, controlling protection on field data, writing indication bytes into the storage, and writing the data required to be stored into the storage. According to the power failure data protection device provided by the invention, reliable storage of the field data can be realized when the control system is suddenly powered off or the power of the control system fails.

Description

technical field [0001] The invention relates to the field of embedded system data protection, in particular to a power-down data protection device for a real-time control system. Background technique [0002] Real-time control systems are generally embedded systems. If there is a sudden power failure (power failure) during the work process (such as parts processing), it is often necessary to save the operating data at the time of power failure in real time. Continue to run on the basis of to ensure the accuracy of the control system. [0003] The data protection method in the real-time control system on the market generally adopts the RAM chip with internal battery to save data or adds a lithium battery (or rechargeable battery) in the circuit. When the system is powered off, the data memory (RAM) ) is powered separately so that the data in the data memory is not lost, so as to achieve the purpose of data protection. The two are essentially the same, and both are powered by...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of battery power supply is that there will be pulse or surge interference on the power supply during the power-on or power-off process of the system. During the power supply switching process, it is easy to impact the data in the battery-saved RAM, resulting in data loss or error.

Similarly, using the voltage monitoring method, pulse or surge interference will be generated on the power supply during the power-off process. At this time, the operation of the main controller is easy to lose control, and data errors or loss will also occur.

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