Method for preventing metering core of upgraded module terminal from losing electricity
A technology of terminal metering and metering chips, which is applied in the field of electric energy meters, can solve problems such as power loss, inability to adapt to market demand, and inability to measure power, achieving the effect of high metering accuracy
Active Publication Date: 2020-12-22
NINGBO SANXING MEDICAL & ELECTRIC CO LTD
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Problems solved by technology
[0003] Since the single-core mode will stop working due to the single-chip microcomputer during the software upgrade and terminal restart process, resulting in the inability to measure the power and causing power loss, so the multi-core mode is generally used in the module terminal, including metering chips, SPI, metering single-chip, UART ,Core board
However, there is also a problem, that is, with the needs of business expansion, the firmware of the metering single-chip microcomputer needs to be upgraded, and the problem of power loss will occur during the upgrade process. If the metering single-chip microcomputer is not upgraded for accurate power measurement, it will not be able to meet market demand.
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[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0031] Such as figure 1 Shown is a schematic diagram of the module terminal structure of this application. As shown in the above figure, the core board includes a high-performance CPU module, a large memory module RAM and a large-capacity storage module EMMC for processing complex business APPs; correspondingly, a metering single-chip microcomputer It is a low-end Cortex-M0 microcontroller, using IIC to connect to an external EEPROM module to store real-time power, and using SPI to connect to a DataFlash module to store frozen data and u...
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The invention relates to a method for preventing a metering core of an upgraded module terminal from losing electricity. The method realizes 698 and a self-defined upgrading protocol through UART communication between a core board and a metering MCU, and when a metering singlechip microcomputer is abnormal, the core board can control an electronic switch, directly read and write the metering chipand perform metering, and an SPI is switched by the core board. Before and after upgrading, the core board and the metering singlechip microcomputer exchange electric quantity, and upgrading is carried out at the moment when the electric quantity of one day is minimum, so that high metering precision is effectively ensured, and no electric quantity loss in the upgrading process is realized.
Description
technical field [0001] The invention relates to the technical field of electric energy meters, in particular to a method for upgrading a metering core of a module terminal without losing power. Background technique [0002] At present, the power collection terminal is divided into two modes: single-core and multi-core. The single-core mode means that a terminal has only one microprocessor single-chip microcomputer to handle the metering chip communication power calculation and business processing; the multi-core mode means that a dedicated single-chip microcomputer is responsible for metering for the metering function, and other services are realized by a high-performance processor. [0003] Since the single-core mode will stop working due to the single-chip microcomputer during the software upgrade and terminal restart process, resulting in the inability to measure the power and causing power loss, so the multi-core mode is generally used in the module terminal, including m...
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IPC IPC(8): G01R22/06
CPCG01R22/063Y02D10/00
Inventor 赵雨婷邹连明刘宁
Owner NINGBO SANXING MEDICAL & ELECTRIC CO LTD