Device of self-recording and transmitting parameters of electric power

Abstract

The invention discloses an electric parameter auto recording and transmitting device, comprising microcontroller, keyboard interface, FLASH memory, display, external digital electric meter and multichannel isolated power supply, where the external digital electric meter is connected through communication interface with the microcontroller; the memory space of the FLASH memory is divided into X blocks which act as a head-tail interlinked annular circulating memory area; when a data block is written in, it records a number Y at block head, where Y belongs to [0,a], and a >=2(X+1); and it defines the block number used for the previous recording as Z, and when normally recording, the number Y= Z+1; when electrifying again to wait for special event after power off, the number Y=Z+2. And the invention extremely prolongs service life and improves reliability.

Description

technical field [0001] The invention relates to a power parameter automatic recording and transmission device, which belongs to the field of power parameter automatic measurement and management. Background technique [0002] Energy and resources such as electricity, gas and water are the lifeblood of national economic development. In order to save energy and resources, various types of automatic recording instrument technical solutions have been born, such as: "multi-user multi-functional network type single-phase electric energy meter" disclosed by CN2501059Y for automatic detection and recording of power parameters, CN2409680Y The disclosed "automatic management device for electricity metering" and the "large-capacity remote meter reading centralized controller" disclosed in CN2434652Y for recording tap water, heat supply and gas, etc. In the prior art, since the period of data detection and recording is long and the amount of data storage is relatively small, it is gener...

AI Technical Summary

Problems solved by technology

The general method is: use a fixed storage unit to record the first and last addresses of the recorded data, or mark the total number of blocks of valid data recorded, which will inevitably result in duplication of data block positions and "fixed units" for each recorded and detected data erase

Since the erasing and writing life of FLASH memory is generally less than 1 million times, frequent erasing and writing of specific storage areas will easily lead to premature failure or damage of these areas, and make its application objects such as electricity, gas, water automatic recording devices or instrument failures rate rises, lifespan shortens

On the other hand, because the algorithm and file management system uniformly used by the FLASH storage unit are relatively complex, occupy more RAM, and take up longer CPU time, it can only be used in advanced embedded systems with embedded operating systems at present. Appears in equipment such as automatic recording and transmission devices of power parameters programmed by microprocessors

Images