Intelligent electric meter and electric meter system for optimizing power supply of memory

Abstract

The utility model provides an intelligent electric meter and an electric meter system for optimizing power supply of a memory. The intelligent electric meter comprises a power supply module, an MCU module, a DC / DC conversion module, an LDO module, a FLASH module and an EEPROM module. The power supply module is connected with the DC / DC conversion module; the DC / DC conversion module is respectively connected with the MCU module and the LDO module; the MCU module is respectively connected with the EEPROM module, the LDO module and the FLASH module; and the LDO module is also connected with the FLASH module. The optimized power supply mode of the memory is directly controlled by the power supply through the MCU module, so that the memory can be flexibly regulated and controlled to work as required; static power consumption of the electric energy meter during working is effectively reduced, and the service life of the battery is prolonged. On the premise of not increasing cost, the service life of the memory and the ammeter battery is prolonged, and the market competitiveness of the intelligent ammeter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric meters, in particular to an intelligent electric meter and an electric meter system for optimizing the power supply of a memory. Background Art

[0002] An intelligent electric energy meter is an electric energy meter with metering, communication, and control functions, and can realize functions such as remote meter reading, rate control, and fault diagnosis. During the operation of the intelligent electric energy meter, many important data need to be saved, such as calibration parameters, factory default parameters, electricity quantity, events, freezing, load records, etc. These data need to be stored during the power-on operation process or after a power outage. When powered on, these data are temporarily stored in the RAM of the MCU. To save these data, a memory must be used. The memory of the intelligent electric energy meter includes two types: EEPROM and FLASH. The MCU of the electric energy meter will store data in different memories according to the different characteristics of the data.

[0003] Currently, due to the large market competition and a large number of tenders for electric meters, there are relatively high requirements for cost price control. Especially for single-phase electric meters, the cost price control is more stringent. If a memory with a large storage space is used, it will increase the R & D cost, resulting in the designed product having no competitive advantage in the market. Therefore, it is necessary to consider using a memory with a smaller storage space.

[0004] In the current electric meter market environment, especially the overseas electric meter market environment is complex, with many technical requirements, and customers have various unstable technical requirement changes. Therefore, it is very important to improve the utilization efficiency of the memory in the intelligent electric meter without increasing costs and meeting the technical requirements of customers.

[0005] As Figure 1 shown in the schematic diagram of the memory circuit composition and connection relationship of the intelligent electric meter in the prior art. It can be seen that both the FLASH and EEPROM in the existing intelligent electric meter adopt a direct power supply method. When the electric meter is powered on, the DC / DC conversion module directly outputs a 5V power supply to the EEPROM for power supply, and at the same time, outputs a 3.3V power supply to the FLASH through an LDO conversion. When the power supply is stable, the memory can be read and written. However, this power supply method has the following drawbacks: 1. The 5.0V voltage and 3.3V voltage output by the electric meter at the moment of just being powered on are not stable. If the electric meter is interfered by the outside world at this time, it may cause data loss in the memory; 2. The program has not fully entered the working state at the moment when the electric meter is powered on. If the reset is abnormal or the software runs away at this time, it may cause the data in the memory to be tampered with. Summary of the Utility Model

[0006] The technical problem to be solved by the present utility model is to provide an intelligent electric meter and an electric meter system for optimizing the power supply of a memory, which can optimize the power supply mode of the memory of the intelligent electric meter without increasing costs, thereby improving the service life of the memory and the battery of the intelligent electric meter, and further enhancing the market competitiveness of the intelligent electric meter.

[0007] To solve the above technical problem, the first technical solution adopted by the present utility model is:

[0008] An intelligent electric meter for optimizing the power supply of a memory, comprising: a power supply module, an MCU module, a DC / DC conversion module, an LDO module, a FLASH module, and an EEPROM module;

[0009] The power supply module is connected to the DC / DC conversion module; the DC / DC conversion module is respectively connected to the MCU module and the LDO module; the MCU module is respectively connected to the EEPROM module, the LDO module, and the FLASH module; the LDO module is also connected to the FLASH module.

[0010] Optionally, the MCU module is connected to the EEPROM module through its first I / O interface to supply power to the EEPROM module.

[0011] Optionally, the MCU module is further connected to the EEPROM module through its I2C interface.

[0012] Optionally, the MCU module is further connected to the LDO module through its second I / O interface to transmit a driving signal to the LDO module to control the power supply of the LDO module to the FLASH module.

[0013] Optionally, it further comprises a display module; the display module is connected to the MCU module.

[0014] Optionally, the MCU module is an MCU chip.

[0015] The second technical solution adopted by the present utility model is:

[0016] An electric meter system, comprising the above intelligent electric meter for optimizing the power supply of a memory.

[0017] The beneficial effects of the present utility model are as follows: For the intelligent electric meter of the present utility model, the power supply circuit of its memory is designed such that the DC / DC conversion module is respectively connected to the MCU module and the LDO module; the MCU module is respectively connected to the EEPROM module, the LDO module, and the FLASH module; and the LDO module is connected to the FLASH module. In this way, after the electric meter is powered on, the DC / DC conversion module supplies power to the MCU module and the LDO module respectively, and then the MCU module directly drives the EEPROM module to supply power to the EEPROM module, and directly drives the LDO module to control the LDO module to supply power to the FLASH module. Since the optimized memory power supply method is directly controlled by the power supply through the MCU module, it can flexibly adjust the operation of the memory as needed, that is, control the corresponding memory to operate by supplying power when necessary, and stop supplying power to the memory after power-off without using the battery to continue supplying power; compared with the traditional memory power supply method of the electric meter, it can effectively reduce the static power consumption when the electric meter is working and the battery power consumption after the electric meter is powered off, effectively extend the service life of the battery; it achieves the extension of the service life of the memory and the electric meter battery without increasing the cost, and improves the market competitiveness of the intelligent electric meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic structural diagram of the memory power supply circuit of an intelligent electric meter in the prior art;

[0019] Figure 2 FIG. is a schematic structural diagram of the memory power supply circuit of an intelligent electric meter with optimized memory power supply provided by an embodiment of the present utility model.

[0020] LABEL DESCRIPTION:

[0021] 1. Power supply module; 2. MCU module; 3. DC / DC conversion module; 4. LDO module;

[0022] 5. FLASH module; 6. EEPROM module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To describe in detail the technical content, achieved objectives, and effects of the present utility model, the following is described in conjunction with the embodiments and with reference to the accompanying drawings.

[0024] Please refer to Figure 2 , Embodiment 1 of the present utility model is as follows:

[0025] This embodiment provides an intelligent electric meter with optimized memory power supply. As Figure 2 shown, its memory power supply circuit includes: a power supply module 1, an MCU module 2, a DC / DC conversion module 3, an LDO module 4, a FLASH module 5, and an EEPROM module 6;

[0026] The power supply module 1 is connected to the DC / DC conversion module 3; the DC / DC conversion module 3 is respectively connected to the MCU module 2 and the LDO module 4; the MCU module 2 is respectively connected to the EEPROM module 6, the LDO module 4 and the FLASH module 5; the LDO module 4 is also connected to the FLASH module 5.

[0027] In some specific embodiments of this embodiment, such as Figure 2 shown, the MCU module 2 includes a first I / O interface and an I2C interface; the MCU module 2 is connected to the EEPROM module 6 through its first I / O interface to supply power to the EEPROM module 6; the MCU module 2 is also connected to the EEPROM module 6 through its I2C interface to realize two-way data interaction between the MCU module 2 and the EEPROM module 6, and the data includes control information sent by the MCU module to the EEPROM module and status information fed back by the EEPROM module to the MCU module, etc.

[0028] In some other specific embodiments of this embodiment, such as Figure 2 shown, the MCU module 2 further includes a second I / O interface; the MCU module 2 is connected to the LDO module 4 through its second I / O interface to transmit a driving signal to the LDO module 4 to drive it, thereby controlling the power supply of the LDO module 4 to the FLASH module 5.

[0029] In some other specific embodiments of this embodiment, the smart meter further includes a display module, preferably a liquid crystal display, for displaying various information of the smart meter including status information, etc.

[0030] In this embodiment, preferably, the MCU module is an MCU chip, such as an MCU chip with the model of Fudan Microelectronics FM33A048.

[0031] The working principle of the smart meter for optimizing the power supply of the memory provided in this embodiment, that is, the memory power supply method is:

[0032] After the smart meter is powered on, the AC voltage of the power supply module is converted into a DC 5.0V voltage through the DC / DC conversion module, and then the MCU module and the LDO module are powered respectively; during operation, the MCU module configures its first I / O interface as an output port, and converts the level signal output from the first I / O interface into a signal recognizable by external devices through an internal driver and a control circuit, so as to drive the EEPROM module to work and realize the control of the working power supply of the EEPROM module; at the same time, the MCU module also configures its second I / O interface as a strong drive current mode, and controls the intensity of its drive current signal through an internal circuit to drive the LDO module, so as to control the LDO module to output 3.3V voltage to the FLASH module and realize the control of the working power supply of the FLASH module.

[0033] After the electric energy meter is powered on, when data needs to be read and written to the memory (FLASH module and / or EEPROM module), the memory can be powered on first through the control of the MCU module, and then wait for a delay until the memory enters a stable working state before data can be read and written to the memory; when the memory is not working, the power supply can be turned off through the MCU module.

[0034] The smart meter with optimized memory power supply provided in this embodiment adopts a power supply method based on its memory power supply circuit, which is directly controlled by the power supply through the MCU module. Therefore, it can flexibly adjust the memory operation according to needs, that is, control the corresponding memory operation by power supply when necessary, and stop power supply to the memory after power off without using the battery to continue power supply; compared with the traditional memory power supply method of the electric meter, it can effectively reduce the static power consumption when the electric energy meter is working and the battery power consumption after the electric meter power off, and effectively extend the battery service life; it extends the service life of the memory and the electric meter battery without increasing the cost, and improves the market competitiveness of the smart meter.

[0035] Embodiment 2 of the present utility model is as follows:

[0036] This embodiment is further expanded based on Embodiment 1, and provides an electric meter system, and the smart meter used in combination is the smart meter with optimized memory power supply provided in Embodiment 1. Here, the optimized memory power supply circuit and memory power supply method in the smart meter will not be elaborated, and details can be referred to the description of Embodiment 1.

[0037] In some specific embodiments, the electric meter system includes multiple smart meters, at least one concentrator and a management system. Here, multiple smart meters are connected to the management system through the concentrator. Here, multiple smart meters establish a communication connection relationship with the management system through the concentrator, realizing the unified management of all smart meters by the management system.

[0038] The electric meter system provided in this embodiment uses an intelligent electric meter with an optimized memory power supply circuit and memory power supply method. Based on the power supply method of its memory power supply circuit, it directly supplies power through the MCU module by the power supply. Therefore, it can flexibly control the operation of the memory on demand, that is, supply power to control the corresponding memory operation when necessary, and stop supplying power to the memory after power-off without using the battery to continue supplying power. Compared with the traditional memory power supply method of the electric meter, it can effectively reduce the static power consumption when the electric meter works and the battery power consumption after the electric meter power-off, and effectively extend the battery service life. It achieves the extension of the service life of the memory and the electric meter battery without increasing costs, and improves the market competitiveness of the intelligent electric meter.

[0039] In summary, the present invention provides an intelligent electric meter and an electric meter system that optimize the memory power supply. Without increasing costs, by improving the memory power supply circuit, optimizing the memory power supply method of the intelligent electric meter, and directly controlling the power supply of the memory by the power supply through the MCU module, it can flexibly control the operation of the memory on demand. Furthermore, it effectively reduces the static power consumption when the electric meter works, and at the same time improves the service life of the memory and the battery of the intelligent electric meter, achieving the purpose of improving the market competitiveness of the intelligent electric meter.

[0040] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An intelligent electric meter that optimizes the power supply of the memory, characterized in that, Including: A power supply module, an MCU module, a DC / DC conversion module, an LDO module, a FLASH module, and an EEPROM module; The power supply module is connected to the DC / DC conversion module; the DC / DC conversion module is respectively connected to the MCU module and the LDO module; the MCU module is respectively connected to the EEPROM module, the LDO module, and the FLASH module; the LDO module is also connected to the FLASH module.

2. The intelligent electric meter for optimizing the power supply of the memory according to claim 1, wherein The MCU module is connected to the EEPROM module through its first I / O interface to supply power to the EEPROM module.

3. The intelligent electric meter for optimizing the power supply of the memory according to claim 2, wherein The MCU module is also connected to the EEPROM module through its I2C interface.

4. The intelligent electric meter for optimizing the power supply of the memory according to claim 1, characterized in that The MCU module is also connected to the LDO module through its second I / O interface to transmit a driving signal to the LDO module to control the power supply of the LDO module to the FLASH module.

5. The intelligent electric meter for optimizing the power supply of the memory according to claim 1, characterized in that, It further includes a display module; the display module is connected to the MCU module.

6. The intelligent electric meter for optimizing the power supply of the memory according to claim 1, characterized in that The MCU module is an MCU chip.

7. An electricity meter system, characterized in that, Including the smart meter for optimizing the power supply of the memory according to any one of claims 1 to 6 above.

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