Intelligent electric energy meter

Abstract

The utility model provides an intelligent electric energy meter, and the meter comprises a metering unit which comprises a current transformer and / or a voltage transformer, and is used for achieving the measurement of electric energy; the processing unit is in communication connection with the metering unit so as to set basic parameters of the metering unit after the processing unit enters the factory mode; the storage unit is in communication connection with the processing unit and stores a first power-on mark; the intelligent electric energy meter is not provided with a short circuit point, so that the intelligent electric energy meter automatically enters a factory mode, convenience and rapidness are achieved, and the debugging efficiency of the intelligent electric energy meter is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of smart meters, and relates to a meter production testing technology, in particular to a smart meter. BACKGROUND

[0002] The factory mode of an electric energy meter refers to a special mode used in the production, testing and configuration stage of the electric energy meter, which is used to set some basic parameters of the electric energy meter to ensure that the electric energy meter can work normally after leaving the factory. It should be noted that, since the basic parameters of the electric energy meter cannot be changed at will, in order to avoid user misoperation, the electric energy meter can only set the basic parameters when it enters the factory mode.

[0003] In the prior art, the factory mode is usually entered by setting a short-circuit point on the electric energy meter, and when the short-circuit time of the short-circuit point exceeds the preset time, the electric energy meter enters the factory mode to set the basic parameters of the electric energy meter. However, this method of entering the factory mode usually needs to manually short-circuit the short-circuit point, which is not convenient and fast, and the setting of the short-circuit point means that the layout of the electric energy meter PCB needs to be additionally increased by the part of the short-circuit point, and specific tools and materials are needed, thereby increasing the area and complexity of the electric energy meter PCB, and further increasing the manufacturing cost of the electric energy meter.

[0004] Therefore, how to quickly and conveniently make the electric energy meter enter the factory mode without setting a short-circuit point on the electric energy meter is an urgent problem for those skilled in the art. SUMMARY

[0005] The present application aims to provide a smart electric energy meter, which solves the problem in the prior art that the smart electric energy meter needs to be short-circuited by a short-circuit point to enter the factory mode, which is not convenient and fast, and the setting of the short-circuit point increases the manufacturing cost of the electric energy meter.

[0006] In a first aspect, the present application provides a smart electric energy meter, comprising: a metering unit comprising a current transformer and / or a voltage transformer, for realizing electric energy measurement; a processing unit in communication connection with the metering unit, to set the basic parameters of the metering unit after the processing unit enters the factory mode; a storage unit in communication connection with the processing unit, and storing a first power-on mark; wherein the smart electric energy meter is not provided with a short-circuit point.

[0007] The application is connected with the storage unit through the communication connection between the processing unit and the storage unit, so that the processing unit can obtain the first power-on mark in the storage unit, thereby enabling the smart electric energy meter to automatically enter the factory mode, and thus the automation and intelligence of the smart electric energy meter are realized, and the debugging efficiency of the smart electric energy meter is improved. It should be noted that the short-circuit point is not set on the smart electric energy meter, but the processing unit automatically enters the factory mode, thereby effectively reducing the production cost of the smart electric energy meter.

[0008] In an embodiment of the application, when the processing unit obtains the first power-on mark, the processing unit enters the factory mode and deletes the first power-on mark, otherwise, the processing unit is in the normal mode.

[0009] In an embodiment of the application, the storage unit includes a first power-on area for storing a first power-on mark and being connected in communication with the processing unit; and the first power-on mark includes the first power-on mark and a disordered mark, wherein the disordered mark is a disordered string of all data in the storage unit.

[0010] In an embodiment of the application, the smart electric energy meter further includes an LED alarm unit connected in communication with the processing unit; the storage unit includes a test area connected in communication with the processing unit for testing the storage unit; wherein when the storage unit test fails, the processing unit sends an alarm signal to the LED alarm unit, and the LED alarm unit lights up to alarm.

[0011] In an embodiment of the application, the processing unit includes a crystal oscillator, which provides a clock signal to the processing unit to realize timing; when the processing unit enters the factory mode, the processing unit starts timing, and when the timing time of the processing unit is a preset setting time, the processing unit enters the normal mode.

[0012] In an embodiment of the application, the setting time is 6 hours.

[0013] In an embodiment of the application, the crystal oscillator is an SMD7015 patch crystal oscillator.

[0014] In an embodiment of the application, the smart electric energy meter further includes a display unit connected with the processing unit to display the timing time.

[0015] In an embodiment of the application, the display unit is an HT1708016P00 liquid crystal screen.

[0016] In an embodiment of the present application, the storage unit comprises at least one M24512-RMN6TP electrically erasable programmable read-only memory; and the processing unit is an RN8213 master chip.

[0017] As described above, the present application provides a smart electric energy meter. The first power-on mark in the storage unit is acquired by the processing unit, so that the smart electric energy meter automatically enters the factory mode, thereby improving the intelligence of the electric energy meter, without manual operation, which is convenient and fast, and is conducive to improving the debugging efficiency of the smart electric energy meter, thereby improving the production efficiency of the electric energy meter. Further, the smart electric energy meter is not provided with a short-circuit point, i.e., the smart electric energy meter automatically enters the factory mode, thereby saving the cost of materials and tools for setting the short-circuit point, and the processing unit also does not need to be provided with a short-circuit point port, which simplifies the complexity of the circuit of the PCB of the electric energy meter, and effectively reduces the production cost of the smart electric energy meter. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A circuit structure schematic diagram of a smart electric energy meter according to an embodiment of the present application is shown.

[0019] Figure 2 A circuit structure schematic diagram of another smart electric energy meter according to an embodiment of the present application is shown.

[0020] Figure 3 A circuit structure schematic diagram of another smart electric energy meter according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0021] The embodiments of the present application will be described in detail hereinafter with specific reference to the drawings. Those skilled in the art will easily understand other advantages and effects of the present application from the content disclosed in the specification. The present application can also be implemented or applied in other different embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0022] It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present application, and only the components related to the present application are shown in the diagrams, rather than the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be arbitrarily changed, and the layout pattern of the components can also be more complex.

[0023] The following embodiments of this application provide a smart energy meter. Through the communication connection between the processing unit U1 and the storage unit U2, the first power-on flag of the storage unit U2 is obtained, thereby enabling the smart energy meter to automatically enter factory mode without human operation. This is convenient and fast, effectively improving the efficiency of the smart energy meter entering factory mode, thereby enhancing the intelligence and automation of the energy meter. Furthermore, there is no need to set short-circuit points, saving the materials and tools required to manufacture short-circuit points, thus reducing the manufacturing cost of the smart energy meter and facilitating its practical application.

[0024] The following will describe in detail the principle and implementation method of a smart energy meter according to this embodiment with reference to the accompanying drawings, so that those skilled in the art can understand the smart energy meter of this embodiment without creative effort.

[0025] It should be noted that the factory mode of a smart meter refers to the setting of basic parameters of the smart meter by operators before it leaves the factory, so that the smart meter received by the user after leaving the factory can be used normally. For example, in the factory mode, the metering parameters of the smart meter are set, such as the transformation ratio of the current transformer and the transformation ratio of the voltage transformer, to ensure the metering accuracy of the smart meter after leaving the factory. It should also be noted that other settings can be made to the smart meter in the factory mode, such as communication management settings, storage management settings, and security control settings. Those skilled in the art should know that other settings can be made to the smart meter based on actual needs, and this application will not describe them in detail here.

[0026] like Figure 1 As shown, the smart meter provided in this embodiment includes: a processing unit U1, a metering unit (not shown in the figure), and a storage unit U2, which are communicatively connected to the processing unit U1. The processing unit U1 is actually the core controller of the smart meter, used to coordinate the processing of each unit of the smart meter to achieve the settings of each unit. It should be noted that when the smart meter enters factory mode, it actually means that the processing unit U1 enters factory mode, allowing operators to set the parameters of other units through the processing unit U1. For example, the processing unit U1 is an RN8213 main control chip.

[0027] Storage unit U2 stores data within the smart meter. Specifically, storage unit U2 stores a first power-on flag. This first power-on flag indicates that the smart meter is being powered on for the first time and has not been debugged. Therefore, when storage unit U2 stores the first power-on flag, the smart meter needs to enter factory mode for pre-shipment parameter settings. Based on this, processing unit U1 is communicatively connected to storage unit U2. When processing unit U1 obtains the first power-on flag stored in storage unit U2, processing unit U1 enters factory mode.

[0028] It should be noted that no shorting points are provided on the smart meter. This is because the processing unit U1 automatically enters factory mode, eliminating the need for manual operation via shorting points. Therefore, since no shorting points are required on the smart meter, no shorting point port is needed on the processing unit U1, saving interface resources and simplifying its circuit design. This reduces the production cost of the smart meter. Furthermore, the elimination of shorting points saves on material and tooling costs associated with shorting points, further reducing the overall production cost.

[0029] Furthermore, to prevent the smart meter from repeatedly entering factory mode, which could lead to user errors during normal use and affect its normal operation, or even pose safety hazards, the processing unit U1 deletes the first power-on flag upon entering factory mode. Specifically, the processing unit U1 sends a delete first power-on flag instruction to the storage unit U2. Upon receiving this instruction, the storage unit U2 deletes the stored first power-on flag. Deleting the first power-on flag includes, but is not limited to, clearing or overwriting the first power-on flag, as long as it prevents the processing unit U1 from reading it again. This embodiment does not impose specific limitations.

[0030] In some optional embodiments, the storage unit U2 includes a first power-on area for storing a first power-on marker, which is a marker indicating that the smart meter is first connected to the power supply. Specifically, the first power-on marker can be a parameter of the smart meter that is set and stored in the first power-on area of ​​the storage unit U2, or the smart meter can be set by a host computer and the corresponding time data can be stored in the first power-on area of ​​the storage unit U2, or the smart meter can be equipped with a counter to count the number of times the smart meter is powered on and store the count in the first power-on area of ​​the storage unit U2. This embodiment does not impose specific limitations here.

[0031] It should be noted that the smart meter is being powered on for the first time, which means that the smart meter has not been powered on and tested before. Therefore, the parameters of the smart meter have not been set. Based on this, the first power-on flag includes the first power-on flag, so as to determine whether the smart meter has entered the factory mode.

[0032] Furthermore, to further determine whether the smart meter has been debugged and whether it needs to enter factory mode, in some optional embodiments, the first power-on flag includes an initial power-on flag and a disorder flag. The disorder flag indicates that all data in storage unit U2 is an unordered string, meaning that storage unit U2 does not store any set data or parameters, indicating that the smart meter has not undergone power-on debugging. Based on this, processing unit U1 can enter factory mode based on the initial power-on flag and the disorder flag. Compared to relying solely on the initial power-on flag to determine whether the smart meter needs to enter factory mode, this embodiment adds a judgment based on the disorder flag of all data in storage unit U2, thereby effectively avoiding the possibility of the smart meter mistakenly entering factory mode after leaving the factory, further improving the security of the smart meter.

[0033] For example, the storage unit U2 includes at least one M24512-RMN6TP electrically erasable programmable read-only memory (EROM) for storing the first power-on marker and other data that the smart meter needs to store during normal use. A single M24512-RMN6TP EROM can serve as one area of ​​the storage unit U2 to store specific data, such as storing the first power-on marker as a first power-on area; or, a single M24512-RMN6TP EROM can include multiple areas of the storage unit U2 to store different specific data.

[0034] The metering unit is a functional unit in a smart energy meter used to measure electrical energy data, including current transformers and / or voltage transformers. After entering factory mode, the smart energy meter needs to set the basic parameters of the metering unit, including but not limited to the transformation ratio of the current transformer and the voltage transformer, to ensure that the metering unit can accurately measure electrical energy data after leaving the factory, thereby guaranteeing the accuracy and reliability of the smart energy meter. Of course, those skilled in the art should know that the settings required for a smart energy meter in factory mode include, but are not limited to, metering parameters. Other settings can also be made, such as communication management settings, storage management settings, and security control settings, to achieve other functions of the smart energy meter. This embodiment only provides an illustrative example of the parameter settings for the metering unit to facilitate understanding by those skilled in the art. However, depending on actual needs, the smart energy meter provided in this embodiment can also have similar designs for other functional units to be set accordingly in the smart energy meter's factory mode, which will not be specifically explained here.

[0035] It should be noted that the processing unit U1 determines whether the smart meter has entered factory mode by acquiring the first power-on flag stored in the storage unit U2. Therefore, to ensure the smart meter correctly enters factory mode, the processing unit U1 needs to confirm whether the storage unit U2 is in a normal state before acquiring the first power-on flag, to avoid misjudgment.

[0036] Specifically, storage unit U2 includes a test area, which is communicatively connected to processing unit U1. Processing unit U1 transmits test data to the test area, and the test area stores the test data as transfer data, i.e., processing unit U1 writes data to storage unit U2. After writing data to storage unit U2, processing unit U1 retrieves the transfer data from the test area again, i.e., processing unit U1 reads the data in storage unit U2 to compare it with the test data, thereby confirming whether storage unit U2 is in a normal state. It should be noted that when storage unit U2 is in a normal state, it can store the test data completely and correctly as transfer data. That is, when the test data and the transfer data are the same, storage unit U2 is in a normal state, and processing unit U1 continues to acquire the first power-on flag in storage unit U2 to enter factory mode. When the test data and the transfer data are different, storage unit U2 may have a problem. For example, shortly after the smart meter is powered on, voltage instability may cause problems with the initialization of storage unit U2, resulting in a problem with storage unit U2. In this case, after a preset stabilization time, storage unit U2 is re-initialized, and processing unit U1 writes data to and reads data from storage unit U2 again to determine whether storage unit U2 has returned to a normal state. The stabilization time is the time to wait for the voltage of the smart meter to stabilize; for example, the stabilization time is 500ms.

[0037] It should be noted that if the storage unit U2 fails to return to normal after a preset number of initialization attempts, the smart meter may be malfunctioning, and an alarm will be triggered to alert the operator to check the smart meter. Based on this, in some optional implementations, such as... Figure 2 As shown, the smart energy meter also includes an LED alarm unit U3 communicatively connected to the processing unit U1. The LED alarm unit U3 includes at least one light-emitting diode. When the storage unit U2 fails the test, that is, when the storage unit U2 has undergone a preset number of initializations but still has not returned to a normal state, the processing unit U1 sends an alarm signal to the LED alarm unit U3 to cause the LED alarm unit U3 to light up and sound an alarm, thereby prompting the operator to check the smart energy meter. For example, the preset number of times is 50.

[0038] Optionally, after the smart meter completes its setup in factory mode, the operator can manually exit factory mode via button operation, or the host computer can send a command to cause the smart meter to exit factory mode. Alternatively, the smart meter's factory mode may have a time limit; when the smart meter has been in factory mode for a preset setup time, it will automatically exit factory mode and enter normal mode. The setup time is the time required for the smart meter to complete the basic parameter settings in factory mode. Specifically, this setup time can be obtained and set based on production experience; for example, the setup time is 6 hours.

[0039] Furthermore, in order to enable the smart meter to automatically exit factory mode and enter normal mode after a set time, thereby further improving the intelligence level of the smart meter, in some optional implementations, such as... Figure 1 As shown, the processing unit U1 includes a crystal oscillator XTAL1, which provides a stable clock signal to the processing unit U1 to enable timing, allowing the processing unit U1 to automatically exit factory mode after a set time. Specifically, when the processing unit U1 enters factory mode, it increments the time based on the clock signal. When the accumulated time reaches the set time, the processing unit U1 automatically exits factory mode. Alternatively, when the processing unit U1 enters factory mode, it starts a countdown from the set time based on the clock signal. When the time value decreases to 0, the processing unit U1 automatically exits factory mode.

[0040] For example, the crystal oscillator XTAL1 is an SMD7015 surface mount crystal oscillator XTAL1, which uses the mechanical vibration of the quartz crystal to generate a stable electrical signal to provide a clock signal to the processing unit U1, wherein the clock frequency of the crystal oscillator XTAL1 is 32.768kHz.

[0041] Furthermore, the factory mode automatically exits by setting a time; that is, the smart meter will not exit factory mode if the factory mode time has not exceeded the set time. Based on this, when the processing unit U1 does not obtain the first power-on flag from the storage unit U2, the processing unit U1 obtains the timing time to determine whether the smart meter's time in factory mode has reached the set time, in order to select the mode state of the smart meter. Specifically, when the timing time has not reached the set time, the processing unit U1 is in factory mode; when the timing time has reached the set time, the processing unit U1 is in normal mode.

[0042] In some alternative implementations, such as Figure 3As shown, the smart meter also includes a display unit U4 connected to the processing unit U1, used to display the time, so that the operator can observe the remaining time in the smart meter's factory mode, thereby facilitating the operator's control of the smart meter's basic parameter setting process. Exemplarily, the display unit U4 includes an LCD panel; specifically, the display unit U4 is a Holtek HT1708016P00 LCD screen for display.

[0043] In summary, the smart energy meter provided in this application obtains the first power-on flag from the storage unit U2 through the processing unit U1 to confirm that the smart energy meter is powered on for the first time and has not been debugged, thereby automatically entering the factory mode without the need for manual operation by the operator, which improves the efficiency of smart energy meter debugging. Furthermore, since no short-circuit point is set on the smart energy meter, there is no need to set a short-circuit point port on the processing unit U1, which effectively reduces the manufacturing cost of the smart energy meter and has high industrial application value.

[0044] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0045] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A smart meter, characterized by, The utility model relates to an intelligent electric energy meter, comprising: a metering unit comprising a current transformer and / or a voltage transformer for realizing electric energy measurement; a processing unit in communication connection with the metering unit to set basic parameters of the metering unit after the processing unit enters a factory mode; a storage unit in communication connection with the processing unit and storing a first power-on mark; wherein the intelligent electric energy meter is not provided with a short-circuit point.

2. The smart meter of claim 1, wherein, When the processing unit acquires the first power-on mark, the processing unit enters a factory mode and deletes the first power-on mark, otherwise, the processing unit is in a normal mode.

3. The smart meter of claim 2, wherein, The storage unit comprises a first power-on area for storing a first power-on mark and in communication connection with the processing unit; the first power-on mark comprises the first power-on mark and a disordered mark, wherein the disordered mark is a disordered string of all data in the storage unit.

4. The smart meter of claim 1, wherein, Further comprising an LED alarm unit in communication connection with the processing unit; The storage unit comprises a test area in communication connection with the processing unit for testing the storage unit; wherein when the storage unit fails the test, the processing unit sends an alarm signal to the LED alarm unit, and the LED alarm unit lights up to alarm.

5. The smart meter of claim 1, wherein, The processing unit comprises a crystal oscillator for providing a clock signal to the processing unit to realize timing; When the processing unit enters the factory mode, the processing unit starts timing, and when the timing time of the processing unit is a preset setting time, the processing unit enters the normal mode.

6. The smart meter of claim 5, wherein, The setting time is 6 hours.

7. The smart meter of claim 5, wherein, The crystal oscillator is an SMD7015 patch crystal oscillator.

8. The smart meter of claim 5, wherein, Further comprising a display unit connected with the processing unit to display the timing time.

9. The smart meter of claim 8, wherein, The display unit is an HT1708016P00 liquid crystal screen.

10. The smart meter of claim 1, wherein, The storage unit comprises at least one M24512-RMN6TP electrically erasable programmable read-only memory; and the processing unit is an RN8213 master chip.

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