KR20110016125A - Electronic power meter and display method using the same - Google Patents

Abstract

PURPOSE: An electronic power meter and a display method using the same are provided to help a user to recognize one inspection information by displaying plurality inspection information by a certain interval. CONSTITUTION: An electronic power meter is comprised of on external device including one of a power supply unit, a controller, a power meter inspection unit, a display unit, menu buttons(51-1), and moving buttons(51-2). The external device also includes external signal supply buttons(51-4) generating an external signal. The controller responds to the external signal which is generated through the external signal supply buttons and changes displayed items from a first display mode and a second display mode.

Description

ELECTRICAL POWER METER AND DISPLAY METHOD USING THE SAME

The present invention relates to the field of electricity meters that can check the power consumption, and more particularly to an electronic electricity meter and a display method of the electronic electricity meter capable of selectively displaying the meter information.

The electricity meter is used to measure the amount of power used for the consumer. Conventional wattmeters include a mechanical wattmeter using a 'gear register' and an electronic wattmeter having an LCD display and measuring power consumption in accordance with electric field changes.

1 is a view showing an example of a conventional mechanical meter.

Referring to FIG. 1, in the conventional mechanical wattmeter, an electromagnetic force proportional to the amount of power used by a user acts on a rotating disk, and the rotational force is transmitted to a gear-type resist using a gear conversion method to display an effective power consumption. do.

The above-described mechanical wattmeter generally shows only the current cumulative effective power amount of interest to the user or the utility company's meter reader, but it is simple and easy to judge. However, it does not provide various meter reading information.

FIG. 2 is a diagram illustrating an example of a conventional electronic electricity meter, and FIG. 3 is a diagram illustrating an example of meter reading information that the electronic electricity meter is cyclically.

Referring to FIGS. 2 and 3, a conventional electronic wattmeter includes a terminal block 21 for fastening an incoming power supply, an LCD display panel 24 for displaying related information, and a fastening screw portion for fastening a wattmeter cover with a wattmeter body. 22 and a push button 23 for operation such as 'menu, move, and input' for setting the internal function of the electricity meter.

The main display contents of the LCD display panel 24 include a circular display item number 24-1, an integer value 24-2 indicating each meter reading information, and a unit display 24-3 of each meter reading information. do. The LCD display panel 24 alternately shows information of the next item every six seconds according to various meter reading information.

For example, in FIG. 3, the detailed information that is displayed through the LCD display panel 24 is a cumulative effective power amount (kWh) corresponding to the cycle item 'item 5'.

While the electronic electricity meter has an advantage of providing various metering information, there is a disadvantage in that the metering information must be cyclically displayed for a predetermined interval in order to display all the metering information on one LCD display.

In addition, the main interests of the general user (customer) or the metering facility manager are in the current cumulative effective power amount and the current total cumulative active power amount of the current month, and have a drawback that only adds confusion by showing them in a circular manner along with other metering information.

The present invention has been devised in view of the above-described problems of the conventional mechanical and electronic wattmeters, and an object of the present invention includes a plurality of meter readings and shows the metering information in a cyclic manner for a predetermined interval, and is provided in the existing meter on the wattmeter. Or to provide an external input by pressing a new button, and in response to this, it provides an electronic electricity meter capable of selectively displaying any one meter reading information, in particular, the current cumulative active power of interest of the user. .

In order to achieve the above object of the present invention, according to an aspect of the present invention, an electronic device including a power supply unit, a control unit, a power amount detection unit, a display unit, and an external device unit including at least one of a menu button, a movement button, and an input button. A wattmeter is provided, and the external device of the electronic wattmeter further includes an external signal supply button for generating an external signal, and the controller is currently displayed on the display in response to the external signal generated through the external signal supply button. Change the information item from the first display mode to the second display mode.

One of the first display mode and the second display mode may display one of a plurality of information items in a fixed manner, and the other may display the plurality of information items in a cyclic manner at a time interval.

The plurality of information items include at least one of a current date, a current time, a current total accumulated effective power amount, a current accumulated invalid power amount, a previous month accumulated active power amount, a previous month accumulated active power amount, a previous month accumulated maximum demand power, a monthly average power factor, and a periodic meter reading date. The information item displayed in a fixed manner may include a current total accumulated effective amount of power.

The total cumulative effective power amount displayed in the fixed manner may be displayed by time zone.

According to another aspect of the present invention, there is provided an electronic power meter including a power supply unit, a control unit, a power amount detection unit, a display unit, and an external device unit including a menu button, a movement button, and an input button, wherein the external device unit of the electronic power meter is A first AND logic to which input terminals are respectively connected to a menu button and the movement button, a second AND logic to which input terminals are respectively connected to the movement button and the input button, and input terminals to the menu button and the input button, respectively. An external signal when at least two of the three buttons are pressed simultaneously, including a third AND logic to be connected and an OR logic as an input from the outputs from the first, second and third AND logics. And the controller changes the information item currently displayed on the display unit from the first display mode to the second display mode in response to the generated external signal. It will be displayed.

One of the first display mode and the second display mode may display one of a plurality of information items in a fixed manner, and the other may display the plurality of information items in a cyclic manner at a time interval.

According to still another aspect of the present invention, there is provided a method of displaying an electronic wattmeter, the method comprising: displaying, by a display unit, an information item in a first display mode; Generating an external signal from an external device unit including at least one of a menu button, a move button, and an input button; Instructing, by the controller, the display unit to change the information item to a second display mode and display the information item in response to the external signal; And displaying, by the display unit, the information item in the second display mode in response to the command.

The generating of the external signal may include generating the external signal by pressing an external signal supply button separately provided to generate the external signal.

The generating of the external signal may include generating by simultaneously pressing at least two buttons of the menu button, the move button, and the input button.

As described above, the electronic electricity meter capable of selectively displaying the metering information according to the present invention includes a plurality of metering information and shows the metering information cyclically for a predetermined interval and presses a button or a new button previously provided to the meter. In response to the external input and in response, any one meter information, in particular, the current total cumulative effective power of the user's main interest can be fixedly displayed, and thus the disadvantage of providing limited metering information with the conventional mechanical meter and the conventional meter It can solve the problem of confusion through the circular provision of all meter reading information.

Hereinafter, the same reference numerals will be described in detail with reference to the accompanying drawings, with reference to the same components preferred embodiments of the present invention. The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and should be construed in accordance with the technical meanings and concepts of the present invention.

The embodiments described in the specification and the configuration shown in the drawings are preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, various equivalents and modifications that can be substituted for them at the time of the present application are There may be.

First, the terms appearing in the present embodiment will be briefly defined before the full description of the embodiment of the present invention.

Throughout this specification, the term 'cyclic display' is displayed through an electronic electricity meter, for example, the current date, current time, current total accumulated active power amount, current accumulated reactive power amount, previous accumulated active power amount, previous cumulative active power amount, and previous month accumulated amount. This means that information items such as maximum demand power, average monthly power factor, and periodic meter reading date are displayed with a predetermined time interval.

In addition, the term 'fixed display' throughout this specification means that any one of the above information items is fixedly displayed.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

4 is a front view schematically showing an electronic wattmeter capable of selective display of meter reading information according to an embodiment of the present invention, and FIG. 5 is a schematic diagram of an electronic wattmeter capable of selectively displaying meter reading information according to an embodiment of the present invention. It is a block diagram shown by.

4 and 5, the electricity meter 1 according to an embodiment of the present invention may be, for example, an electronic electricity meter having a single-phase two-wire input power source, and includes a power supply unit 10, a control unit 20, and a power amount detection unit 30. ), The display unit 40, and the external device unit 50.

The power supply unit 10 may include, for example, a power transformer 10-1 and a power supply circuit 10-2 and supply input power to the control unit 20.

The power amount detection unit 30 detects a power amount by detecting and multiplying a voltage and a current from an input power. Therefore, the power amount detector 30 may include a voltage detector 30-1, a current detector 30-2, and a multiplier 30-3 as shown.

Information about the amount of power measured by the amount of power detector 30 may be displayed through the display unit 40 via the controller 20.

The external device unit 50 generates an external signal through a push button 51-in detail, an external signal supply button 51-4 to be described below, and transmits the generated external signal to the control unit 20. . As shown in FIG. 3, the push button 51 includes three buttons including a menu button 51-1, a move button 51-2, and an input button 51-3 at the upper left of the electricity meter 1. It can be a push switch and can be used for time setting, meter reading date setting, and various test mode setting at the initial installation of the electricity meter.

The menu button 51-1 selects and confirms the item to be set, the move button 51-2 is for shifting the setting contents, and the input button 51-3 is for changing the number and setting the contents. Is provided.

In addition, the present embodiment may further include an external signal supply button 51-4 that causes the external device unit 50 to generate an external signal when pressed.

In the present embodiment, the external signal supply button 51-4 is provided in addition to the existing three push buttons 51. However, the present invention is not limited thereto, and, for example, two of the existing three push buttons 51 are provided. It can also be configured to supply an external signal by pressing the push button 51 at the same time. An example of such a case will be described later.

For example, when the first external signal is received from the external device unit 50 when the current display unit 40 is displaying a circular item, the controller 20 may select 'current total cumulative active power amount among several items in response to the received external signal. Command the display unit 40 to display only 'fixedly', and conversely, when only the current total accumulated active power is fixedly displayed on the current display unit 40, the display unit 40 converts the display unit into a circular item display in response to the received external signal. The display unit 40 is instructed.

In addition, when an external signal is received from the external device unit 50 once more, the control unit 20 may instruct the display unit 40 to return to the original display method.

The display unit 40 displays the display items in a circular or fixed manner according to the command of the control unit 20 as described above.

In the embodiment of the present invention, in the fixed display, but the form that 'current total cumulative effective power amount' is continuously displayed, for example, a form that can be applied to the low-voltage type 1 wattmeter, but the present invention is not limited thereto, for example It will be appreciated that the same applies to two or more electricity meters, which alternately display only the 'current cumulative active power' by day and night time zone.

Hereinafter, an operation example of an electronic wattmeter that can selectively display meter reading information according to an embodiment of the present invention will be described with reference to FIG. 6.

Here, in the present embodiment, it is assumed that the electricity meter information including the meter reading information is cyclically displayed at predetermined intervals through the display unit 40 of the electricity meter 1, but the present invention is not limited thereto. For example, the present invention may be similarly applied to a case where the total accumulated active power amount is fixedly displayed and then converted into a circular item display.

In addition, in the present embodiment, an external signal supply button 51-4 is additionally provided to the push button 51 in addition to the existing menu button 51-1, the move button 51-2, and the input button 51-3. Although the present invention is not limited thereto, a combination of the existing menu button 51-1, the move button 51-2, and the input button 51-3 will be described below with reference to FIG. It can also be to show the same action and effect.

6 is a flowchart schematically showing an example of an operation of the electricity meter 1 according to an embodiment of the present invention.

Referring to FIG. 6, first, power meter information including meter reading information is displayed on the display unit 40 in a circular manner (step S10). Next, when the user presses the external signal supply button 51-4, the external device unit 50 generates an external signal in response thereto.

The external signal generated in this way is transmitted to the control unit 20 (step S20). The control unit 20 instructs the display unit 40 to convert the current display mode from cyclic to fixed in response to the received external signal (step S30).

In response to a command from the controller 20, the display unit 40 displays the circular display in a fixed manner with any one of the set information items, for example, the current total accumulated effective power amount (step S40).

In the step S40, the current total cumulative active power is continuously displayed, for example, the low-voltage type 1 electricity meter is not the second type of electricity meter for displaying only the current total cumulative active power by day and night time zones alternately. Only 'current cumulative active power amount' can be displayed alternately by day and night time zones.

By doing so, the user can simply check the current total accumulated effective power of interest among the various information items without any confusion.

Next, when the user presses the external signal supply button 51-4 again while the total accumulated active power is displayed on the display unit 40 as described above, the external device unit 50 generates an external signal in response thereto. Let's do it.

The generated external signal is transmitted to the control unit 20 (step S50) and the control unit 20 instructs the display unit 40 to convert the current display mode from fixed to cyclic in response to the received external signal ( Step S60).

In response to a command from the controller 20, the display unit 40 converts the current total accumulated effective power into a fixed type and displays the entire information items in a cyclic manner at predetermined intervals (step S10).

By doing so, the user can check other information items other than the current total accumulated effective power amount as in the conventional general electronic power meter.

7 is a diagram illustrating an example of an external device unit that generates an external signal by a combination of a conventional push button without adding an external signal supply button according to an embodiment of the present invention.

Referring to FIG. 7, the external device unit 50 according to the present embodiment includes three, that is, a menu button 51-1, a move button 51-2, and an input button 51-3. It may include a push button 51, three AND logic 52, one OR logic 53, and a signal generator 54.

The AND logic 52 and OR logic 53 may be AND logic and OR logic in a generally known form and are not particularly limited.

Three of the AND logics 52 are provided and each of the two inputs is connected to two pushbuttons 51 adjacent to each other.

Therefore, in order for the output from the AND logic 52 to occur, the two push buttons 51 connected to the AND logic 52 must be pressed simultaneously.

In addition, if there is an output for at least one of the three AND logics 52 by the OR logic 53, the OR logic 53 may provide an output signal to the signal generator 54 and accordingly the signal generator 54. ) May generate an external signal.

In the above embodiment, the AND logic 52 and the OR logic 53 are used to change the display method of the information item displayed on the display unit 40 by using three existing push buttons 51 as they are. However, it will be appreciated that the AND logic 52 and OR logic 53 need not be specifically provided in the configuration in which the external signal supply button 51-4 is provided separately.

In addition, in the above embodiment, a case in which the information item is converted / displayed through the display unit 40 in a fixed and circular manner is illustrated, but the present invention is not particularly limited thereto. For example, a display device in a home connected to the electricity meter 1 through wired / wireless communication means. Of course, the case shown through can be applied as well.

In addition, in the above embodiment, as an example of the information items displayed in a fixed manner, the present total cumulative effective power amount is exemplified, but the present invention is not limited thereto, and may be one of various other information items, and in addition, such information items are selectively selected in the electricity meter 1. It may further include a (not shown) setting unit that can be set to.

In addition, in the above embodiment, but the present case is a case of one type of metering, for example, in which the total cumulative effective power amount is fixedly displayed, the present invention is not limited thereto. For example, in the case of two types of metering, the current total accumulation of each of the first time period and the second time period is performed. Only the effective power amount may be displayed alternately at predetermined time intervals, for example, at intervals of 30 seconds.

The technical spirit of the present invention has been described above with reference to the accompanying drawings, but this is only illustrative of the preferred embodiments of the present invention and is not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

1 is a view showing an example of a conventional mechanical wattmeter;

2 is a view showing an example of a conventional electronic electricity meter;

3 is a diagram illustrating an example of meter reading information that an electronic electricity meter cyclically shows;

4 is a schematic front view of an electronic wattmeter capable of selectively displaying meter reading information according to an embodiment of the present invention;

FIG. 5 is a block diagram schematically illustrating an electronic power meter capable of selectively displaying meter reading information according to an embodiment of the present invention; FIG.

6 is a flowchart schematically showing an example of operation of a wattmeter 1 according to an embodiment of the present invention; And

7 is a view showing an example of an external device unit for generating an external signal by a combination of a conventional push button without the addition of an external signal supply button according to an embodiment of the present invention.

Claims (12)

An electronic power meter including a power supply unit, a control unit, a power amount detection unit, a display unit, and an external device unit including at least one of a menu button, a movement button, and an input button. The external device unit further includes an external signal supply button for generating an external signal, and the control unit displays an information item currently displayed on the display unit in a first display mode in response to the external signal generated through the external signal supply button. The electronic power meter, characterized by changing to the second display mode. The display apparatus of claim 1, wherein one of the first display mode and the second display mode displays one of a plurality of information items in a fixed manner and the other displays the plurality of information items in a cyclic manner at a time interval. Electronic electricity meter, characterized in that. The method of claim 2, wherein the plurality of information items include a current date, a current time, a current total accumulated effective power amount, a current accumulated effective power amount, a current accumulated active power amount, a previous month accumulated active power amount, a previous month accumulated maximum demand power, a monthly average power factor, and At least one of the regular meter reading date, wherein the information item is displayed fixedly is an electronic electricity meter, characterized in that the current total cumulative effective amount of electricity. The electronic power meter according to claim 3, wherein the current total cumulative effective power amount displayed in a fixed manner is displayed by time zone. An electronic power meter including a power supply unit, a control unit, a power amount detection unit, a display unit, and an external device unit including a menu button, a movement button, and an input button, The external device unit has a first AND logic to which input terminals are respectively connected to the menu button and the movement button, a second AND logic to which input terminals are respectively connected to the movement button and the input button, and the menu button and the input button. At least two of the three buttons are simultaneously pressed, including a third AND logic to which each of the input terminals is connected, and an OR logic as an input from the first, second, and third AND logics. And generate an external signal when the signal is lost, and wherein the controller changes the information item currently displayed on the display unit from the first display mode to the second display mode in response to the generated external signal. 6. The method of claim 5, wherein one of the first display mode and the second display mode displays one of a plurality of information items in a fixed manner and the other displays the plurality of information items in a cyclic manner at a time interval. Electronic electricity meter, characterized in that. 7. The method of claim 6, wherein the plurality of information items include a current date, a current time, a current total accumulated effective power amount, a current accumulated effective power amount, a current accumulated active power amount, a previous month accumulated active power amount, a previous month accumulated maximum demand power, a monthly average power factor, and An electronic energy meter comprising at least one of the periodic meter reading days and the information item displayed as a fixed type is a current total accumulated effective power amount. The electronic power meter according to claim 7, wherein the current total cumulative effective power amount displayed in a fixed manner is displayed by time zone. Displaying, by the display unit, the information item in the first display mode; Generating an external signal from an external device unit including at least one of a menu button, a move button, and an input button; Instructing the display unit to change the information item to a second display mode and display the information item in response to the external signal; And And the display unit displaying the information item in the second display mode in response to the command. 10. The method of claim 9, wherein one of the first display mode and the second display mode displays one of a plurality of information items in a fixed manner and the other displays the plurality of information items in a cyclic manner at a time interval. Display method of an electronic electricity meter, characterized in that. The method of claim 10, wherein the generating of the external signal comprises generating the external signal by pressing an external signal supply button separately provided to generate the external signal. The method of claim 11, wherein the generating of the external signal comprises generating the external signal by simultaneously pressing at least two of the menu button, the move button, and the input button.

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