KR100312189B1 - Digital electricity meter - Google Patents

Abstract

PURPOSE: An electronic power meter for a condominium is provided to measure the amount of power consumption according to each household and display all measured values on one screen. CONSTITUTION: Detection portions(100-100n) of n number are used for detecting voltage signals proportional to load voltages and load current applied to each distribution line. A power meter portion(100) is formed with a power calculation portion(125) and an input/output separation circuit(120). Output portions(130-130n) of n number are used for outputting each power consumption value as pulse signals. A microprocessor(150) counts the pulse signals of the output portions(130-130n) and stores the integrated power consumption values of each household to an EEPROM(160). An LCD portion(140) is used for displaying the integrated power consumption values of each household as numbers. An external communication line(170) is used for performing communication with an outside. A program loader(180) is used for loading a control program of the microprocessor(150) and ROM data.

Description

Multi-generation electronic electricity meter {Digital electricity meter}

The present invention relates to a multi-generation electronic electricity meter which can display the accumulated power consumption side by side by generation on a screen while reading and accumulating the power consumption of several generations.

A meter is installed in a house or business building to read power consumption. There are two types of meters: mechanical and electronic. Electronic wattmeters are characterized by no mechanically moving parts compared to mechanical ones, and thus have high reliability, stable readings, and miniaturization through integrated circuits. In addition, the electronic can transmit the meter reading value to a remote computer using a separate communication means to enable automation, such as remote meter reading and automatic rate calculation.

An example of a conventional electronic electricity meter is known as Korean Patent Publication No. 91-9904, which will be briefly described with reference to FIG. 1.

The illustrated electronic wattmeter includes a voltage divider circuit 20 for detecting a voltage signal ev proportional to the load voltage V, a current-voltage converter circuit 21 for detecting a voltage signal ei proportional to the load current I, and two voltage signals ev. And sampling and holding circuits 23 and 24 for sampling and holding ei, a multiplexer 25 for selecting any one of voltage signals ev and ei sampled from sampling and holding circuits 23 and 24, and a multiplexer ( A / D converter 26 for converting the analog signals of the two voltage signals ev and ei input through 25) into digital data and outputting the voltage data and the current data corresponding thereto, and the voltage dividing circuit 20 detects them. The delay time detection circuit 27 for detecting the phase delay signal of the voltage signal ev, the clock pulse generator 28, and the voltage data input during the delay time of the phase delay signal by the delay time detection circuit 27; Multiply current data Calculating the power, and it consists of a microprocessor 29 and a display 30 for displaying the integrated processing power to process the accumulated over time.

Such conventional electronic meters are installed individually for each generation. As an example, a meter box for No. 2 installed on each floor of a stepped aft is shown in FIG. 2. Meter No. 10 shown in the wall is a wall-mounted, the body is sized to accommodate two electronic meters as described above, the panel 11 is coupled to the front. The panel 11 has openings 12 and 13 which allow the aforementioned display sections 30 of the two electronic wattmeters housed in the meter box 10 to be exposed to the front thereof, respectively. And the panel 11 is attached to the name plate (14, 15) for writing the lake of the generation corresponding to the electronic electricity meter exposed to the openings (12, 13). Although not shown, the panel 11 is sealed while being coupled to the body of the meter box 10 so that it cannot be opened arbitrarily.

Since the above-described conventional electronic electricity meter is to measure the power consumption of a single household, in the case of a public building in which multiple households reside, such as a multi-family house such as an apartment or a business building officetel commercial building, it should be installed for each household. Therefore, as the number of generations increases, the size of the enclosure as shown in FIG. 2 increases, so that the installation cost increases and there is a difficulty in construction. In addition, as the size increases, it occupies a large area of the wall, and furthermore, there is a problem that greatly deteriorates the aesthetics of the building such as the above-mentioned sealing part protrudes to the outside.

SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-generation electronic electricity meter which can measure the power consumption of several generations by generation in the form of a single electricity meter in consideration of the above problems, and display the measurement results side by side on one screen. will be.

1 is a block diagram illustrating a conventional single generation electronic wattmeter.

Figure 2 is a perspective view showing a meter box for wall-mounted No. 2 for installing a conventional electricity meter on each floor of a stepped apartment.

3 is a block diagram showing a circuit of a multi-generation electronic electricity meter according to an embodiment of the present invention.

Figure 4 is a perspective view showing a preferred form of the meter box equipped with the multi-generation electronic electricity meter shown in FIG.

<Description of the symbols for the main parts of the drawings>

100 to 100n: detection unit 110: power measurement unit

120: input and output separation circuit 125: force calculator

130 to 130n: output unit 140: LCD display unit

150: microprocessor 160: EEP-ROM

170: external communication line 180: program loader

In order to achieve the above object, the multi-generation electronic electricity meter of the present invention includes a plurality of detection units which respectively detect signals representing load voltages and load currents applied to power generation lines of several generations, and consumption per generation based on the detected signals. A power measurement unit including a power calculator for calculating power and an input / output separation circuit for separating inputs and outputs of the power calculator for each generation, and a plurality of outputs each of which converts the small power output for each generation into a pulse signal and outputs the pulse signal; An output unit, a microprocessor that integrates, stores, and displays the power consumption of each generation based on the pulse signals output from the plurality of output units, and the accumulated power consumption of the generations output from the microprocessor. It is provided with a display unit which displays like numerals for generation identification markers on a screen by numbers.

In addition, it is preferable to configure a multi-generation electronic electricity meter further comprising a means for transmitting the output of the microprocessor to the outside for each generation so as to efficiently perform tasks such as meter reading and billing.

Hereinafter, with reference to the accompanying drawings will be described in detail the multi-generation electronic electricity meter.

The multi-generation electronic electricity meter according to the embodiment of the present invention as shown in FIG. 3 includes n detectors 100 to 100n, a power measurement unit 110, n output units 130 to 130n, and an LCD display 140. ), Microprocessor 150, an electronically erasable programmable ROM (EEP-ROM) 160 for storing programs and data such as power consumption and generation identification number of each generation, and enabling communication with the outside for remote meter reading. It is composed of a program loader 180 for loading the external communication line 170, the control program of the microprocessor 150 and ROM data.

Where n represents the number of generations. The n detection units 100 to 100n are configured to detect voltage signals proportional to each of the load voltage and the load current applied to the distribution lines branched into each generation. For example, the voltage signal corresponding to the load voltage may be divided into the above-described voltage divider circuit. The voltage signal corresponding to the load current uses a current-voltage conversion circuit. The power measuring unit 110 multiplies the voltage signals input from the detection units 100 to 100n so that the power calculator 125 and power calculator 125 calculate power consumption of each generation at the same time. And an input / output separation circuit 120 that separates an input and an output to output the operation value by generation. The output units 130 to 130n output a calculated value of the power consumption output from the power measuring unit 110 for each generation as a pulse signal that is preferably one pulse per watt (1 pulse / Watt), respectively.

The microprocessor 150 drives a predetermined program loaded to count pulse signals output from the output units 130 to 130n, thereby integrating the power consumption of each generation and integrating the accumulated power consumption to the EEP-ROM 160. In addition, the accumulated power consumption is displayed numerically on the LCD display unit 140. The predetermined program is loaded into the main memory of the microprocessor 150 by input using an external program loader 180 connected to the microprocessor 150. At this time, the generation identification lake is displayed on the LCD display unit 140, and the address of the EEP-ROM 160 is set as the lake. Accordingly, generation power consumption information output from the microprocessor 150 is stored at a designated address of the EEP-ROM 160 and simultaneously displayed with the corresponding generation identification lake on the LCD display 140.

The microprocessor 150 may also be connected to an external computer system (not shown) through the external communication line 170. That is, by reading a power consumption data of a desired generation by driving a predetermined program and designating an address in an external computer system, remote meter reading is possible, and also by connecting to a separate billing program, automatic billing and automatic bill issuing, etc. Unmanned automation is possible.

Figure 4 shows a preferred form of the wall-mounted meter box for receiving the multi-generation electronic electricity meter according to the embodiment of the present invention and installed on the wall. The illustrated meter box is of a suitable size to accommodate the circuit parts of the above-mentioned multi-generation electronic electricity meter, and has a body 200 having a flange 201 formed around its front face, and a multi-generation electronic electricity meter housed in the body 200. A window 211 through which the LCD display unit 140 can be seen is attached, and a panel 210 is installed on the front of the body 200 so as to be openable and closed, and an auxiliary panel 220 is installed next to the panel 210. . In addition, the sealing unit 205 is provided on the flange 201 to seal the panel 210 and the auxiliary panel 220 so as not to be opened arbitrarily, and the sealing unit 205 is not exposed by covering the cover member 230. will be.

The multi-generation electronic electricity meter of the present invention as described above can be installed to read and display several generations at the same time by being mounted in a meter box of a size similar to that of a conventional first generation electricity meter. Therefore, it is possible to miniaturize the meter box installed in public buildings such as multi-family houses such as apartments or business building officetel shopping malls, thereby reducing installation costs and improving construction convenience, and effectively improving the aesthetics of buildings. to be.

The present invention is also able to communicate with a remote computer system can effectively contribute to the automation of tasks such as remote meter reading, automatic billing and automatic bill issuance for each generation.

Claims (2)

A plurality of detectors each detecting a signal indicating a load voltage and a load current applied to power generation lines of a plurality of generations, a power calculator for calculating power consumption for each generation based on the detected signal, and an input and an output of the power calculator A power measurement unit including an input / output separation circuit for separating generation by generation, a plurality of output units for converting the small power output for each generation from the power measurement unit into pulse signals, and a pulse output from the plurality of output units. A microprocessor that integrates, stores, and outputs the power consumption of each generation based on the signal, and displays the generation identification markers on the screen numerically indicating the accumulated power consumption of the multiple generations output from the microprocessor. Multi-generation electronic electricity meter with a display to display the same. The multi-generation electronic electricity meter according to claim 1, further comprising means for transmitting the output of the microprocessor to the outside for each generation.