Real-time data acquisition system and power failure data saving circuit and method thereof

Abstract

The invention discloses a real-time data acquisition system and a power failure data saving circuit and method thereof. When no power failure happens, a system control module saves real-time data acquired by the acquisition module of the real-time data acquisition system into a mobile storage device to conveniently carry out the copying and the backup saving of the real-time data. During power failure, the system control module switches the power supply of the real-time data acquisition system into the power supply of an energy storage module with a built-in energy storage capacitor through a power supply switching module, and the energy storage capacitor is used as backup electric energy so as to bring the advantages of low cost and wide applicable range. In addition, the system control module reads real-time time in a real-time clock module during the power failure, the real-time time is taken as power failure breakpoint time data to be stored in the mobile storage device with the breakpoint data collected by the acquisition module during the power failure, and the power supply of the acquisition module is cut off. Therefore, the power failure saving of the data is realized, the data can be accessed through the mobile storage device without energization, and the stability and the convenience of the data are improved.

Description

technical field [0001] The invention relates to the technical field of real-time data acquisition in the field of production, in particular to a real-time data acquisition system and its power-down data storage circuit and method. Background technique [0002] The data storage of the existing data acquisition system is mostly stored together with the operating system and application programs. The storage medium uses Flash, hard disk and other devices as storage devices, which are fixedly installed and have bad blocks, and are easily damaged when power off. Moreover, it is inconvenient to copy and backup the data collected in real time, especially after the data acquisition system is powered off, because the flash, hard disk and other devices are not powered on, the data stored in it cannot be taken out, which is very inconvenient. [0003] When the existing data acquisition system is powered off, the usual practice is to use UPS power supply to maintain uninterrupted power s...

AI Technical Summary

Problems solved by technology

[0002] The data storage of the existing data acquisition system is mostly stored together with the operating system and application programs. The storage medium uses Flash, hard disk and other devices as storage devices. It is fixedly installed and has bad blocks, and it is easy to be damaged when power off.

Moreover, it is not convenient to copy and backup the data collected in real time, especially after the data collection system is powered off, because the flash, hard disk and other devices are not powered on, the data stored in it cannot be taken out, which is very inconvenient

[0003] When the existing data acquisition system is powered off, the usual practice is to use UPS power supply to maintain uninterrupted power supply. This method is costly, and after the UPS power is exhausted, the data of the instantaneous power failure cannot be well preserved. ; There are also systems that use lithium batteries as a backup power supply to provide power supply with a delay to ensure data storage at the moment of power failure. However, lithium batteries have a narrow temperature range and are not suitable for use in industrial fields, and the number of cycles of charging and discharging is limited, so they cannot be transported by air. Security risks

Moreover, the existing data acquisition system lacks protection measures for data storage at the moment of power failure

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