KR200430812Y1 - An electronic watt-hour meter with power line communication means - Google Patents

Abstract

The present invention relates to an electronic electricity meter, and in particular, to provide an electronic electricity meter, which can be remotely metered through power line communication and has an integrated power line communication means so that a separate power line communication means is not required. A power line modem capable of demodulating the data signal to a power supply and demodulating the data signal included in the commercial AC power supply; Rectifying and stepping down the low voltage commercial AC power supply to supply a predetermined DC power supply, or providing a received low voltage commercial AC power supply including the data signal conveyed to the power line modem, or modulating the low voltage commercial AC power supply from the power line modem. A power supply circuit unit for outputting the power to a low voltage commercial AC power line; A voltage sensing circuit unit for detecting and providing a voltage of the low voltage commercial AC power supply;

A current sensing circuit unit for detecting and providing a current of the low voltage commercial AC power supply; A power amount measurement circuit unit which calculates an amount of power by integrating the voltage and current detected from the voltage sensing circuit unit and the current sensing circuit unit, and generates and outputs a pulse signal to correspond to the calculated amount of power; It is connected to the power measurement circuit section and the power line modem, and outputs the data of the result value obtained by integrating and integrating the pulse signal over time from the power measurement circuit section, and modulating and outputting the low voltage commercial AC power to the power line modem. A microprocessor for providing data of the integrated result value to make; And a display unit connected to the microprocessor and configured to receive and display data of the accumulated result value from the microprocessor.

Electronic meter, power line communication, power line modem, remote meter reading

Description

Integrated electronic electricity meter which can be remotely read by power line communication {AN ELECTRONIC WATT-HOUR METER WITH POWER LINE COMMUNICATION MEANS}

1 is an external perspective view of a power line modem and an electronic power meter according to the prior art,

2 is a block diagram of a circuit configuration showing the configuration of an electronic power meter capable of remote metering by power line communication according to an embodiment of the present invention,

3 is a block diagram of a circuit configuration showing the configuration of an electronic power meter capable of remote metering by power line communication according to another embodiment of the present invention.

** Description of symbols for the main parts of the drawing **

10: electronic electricity meter 20: power line modem

11, 21, 22: connecting cable 13: power supply circuit

13-1: secondary battery circuit portion 14: current sensing circuit portion

15: voltage sensing circuit section 16: power measurement circuit section

17: microprocessor 17a: first microprocessor

17b: second microprocessor 18: display unit

19: equipment meter pulse input 30: host system

31: central control unit 32: meter reading PC

The present invention relates to an electronic electricity meter, and more particularly, to an electronic electricity meter capable of remote meter reading by power line communication.

Recently, in a multi-family house such as an apartment, a remote meter reading system that allows a meter reader to remotely read the amount of electricity, gas, and water used by each household remotely without visiting each household is being spread. Such methods of remote meter reading include leased line communication using serial communication lines, short range wireless communication, and power line communication methods newly attempted in accordance with recent developments in power line communication. Can be. Here, the leased line communication method has advantages in terms of noise and security in comparison with the wireless method, but there is inconvenience in that the leased line should be installed for each generation in a multi-family housing complex. There is a vulnerability in terms of security. On the other hand, since the power line communication method uses an existing power line, it can be easily installed without installing a new wireless facility or a dedicated line, and security can be secured by granting unique identification information for each generation.

An electronic wattmeter according to the prior art that can communicate with a remote inspection station using such power line communication is as follows.

 1 is an external perspective view of a power line modem and an electronic power meter according to the prior art. In Fig. 1, the configuration of a device capable of communicating the metering data of the electronic electricity meter to a remote location by using power line communication is provided in the electronic electricity meter 10, the power line modem 20, and the electronic electricity meter 10 and provided with a power line. The connection cable 11 for transmitting and receiving data with the modem 20, the connection cable 22 for transmitting and receiving data with the electronic power meter 10, provided in the power line modem 20, and the power line modem 20 It is provided and comprises the connecting cable 21 for connecting the power line modem 20 to the AC 110V (volt) or the low voltage power line of 220V.

Referring to the operation of the apparatus shown in FIG. 1, when the power consumption of the generation in which the electronic watt-hour meter 10 is installed is accumulated in units of time and the data of the accumulated value is provided to the power line modem 20, the power line modem ( 20) modulates the integrated data from the electronic watt-hour meter 10 on a 110 V (volt) or 220 V commercial low voltage AC power source and transmits the data to a remote inspection station (not shown). In addition, the power line modem 20 receives a command signal for transmitting integrated data from the remote inspection station through the power line of the commercial low voltage AC power source, and separates the command signal from the power signal to connect the cable 22 and the connection cable ( 11) to the electronic power meter 10 through.

However, the device consisting of the electronic power meter 10 and the power line modem 20 according to the prior art introduced as described above requires a separate installation space for the power line modem because the power line modem is configured separately and the power meter and the power line modem There is a problem in that a cost for the communication connection is required and thus the cost thereof is added. In addition, when the meter data of equipment meters such as gas meters, water meters, and hot water meters in households are remotely transmitted, a complicated connection of signal lines connecting them with an electronic electricity meter and a power line modem is required. There is a need for a separate generation terminal device to collectively receive the metering data from the field and provide it to the power line modem, the installation space and cost is further increased, the installation work is complicated and time-consuming.

In addition, since there is no configuration that can collectively display the metering data of the facility meter to the user in the household, the user in the household is inconvenient to check each facility meter. In addition, there is no means for supplying emergency power to the electronic wattmeter and electronic components in the generation terminal device, especially the storage means of the metering data, so that the accumulated data can be stored for a long time even during a power failure. In this case, there is a big problem that the accumulated data may be lost and the charging of energy use becomes impossible.

The present invention is conceived to solve the problems of the prior art as described above, an object of the present invention is to provide an electronic power meter embedded with a power line modem so that the installation space can be reduced compared to the prior art.

Another object of the present invention is to provide an electronic electricity meter capable of collecting and displaying comprehensive data of facility meters.

Another object of the present invention is to provide an electronic watt-hour meter that can store the metering data for a long time even in the event of power failure.

An object of the present invention is a power line modem capable of demodulating the data signal contained in the commercial AC power supply and the modulation for carrying the data signal to the low-voltage commercial AC power supply;

Rectifying and stepping down the low voltage commercial AC power supply to supply a predetermined DC power supply, or providing a received low voltage commercial AC power supply including the data signal conveyed to the power line modem, or modulating the low voltage commercial AC power supply from the power line modem. A power supply circuit unit for outputting the power to a low voltage commercial AC power line;

A voltage sensing circuit unit for detecting and providing a voltage of the low voltage commercial AC power supply;

A current sensing circuit unit for detecting and providing a current of the low voltage commercial AC power supply;

A power amount measurement circuit unit which calculates an amount of power by integrating the voltage and current detected from the voltage sensing circuit unit and the current sensing circuit unit, and generates and outputs a pulse signal to correspond to the calculated amount of power;

It is connected to the power measurement circuit section and the power line modem, and outputs the data of the result value obtained by integrating and integrating the pulse signal over time from the power measurement circuit section, and modulating and outputting the low voltage commercial AC power to the power line modem. A microprocessor for providing data of the integrated result value to make;

And a display unit connected to the microprocessor and configured to receive and display data of the accumulated result value from the microprocessor. The electronic power meter according to the present invention can be achieved. .

In addition, another object of the present invention, the equipment connected to at least one of the gas meter, calorimeter, water meter equipment, receiving the pulse signal of the measured value from at least one of them and converts it into a digital signal to provide A meter pulse input unit;

Another microprocessor connected to the facility meter pulse input unit for receiving a digital signal according to an input pulse signal from the facility meter pulse input unit and integrating it to provide the power line modem; In addition to the configuration to achieve the above object of the present invention can be achieved by providing an electronic power meter according to the present invention characterized in that the configuration.

Another object of the present invention,

A facility meter pulse input unit connected to at least one facility meter of a gas meter, a calorimeter, and a water meter, for receiving a pulse signal of a measured value from at least one of them, and converting the resultant signal into a digital signal;

Another microcomputer connected to the facility meter pulse input unit for receiving and integrating a digital signal according to an input pulse signal from the facility meter pulse input unit and outputting the digital signal, and connected to the power line communication modem to provide data to be transmitted to the power line communication modem. A processor;

Connected to the other microprocessor, outputting a digital signal of the metered value of the facility meter from the other microprocessor to display on the display unit, and outputting the data of the integrated value to the other microprocessor to the power line modem. The microprocessor outputs to transmit through;

And a display unit connected to the microprocessor, the display unit capable of additionally displaying the meter value of the facility meter provided by the microprocessor, in addition to the configuration that achieves one object of the present invention. By providing an electronic wattmeter accordingly.

Another object of the present invention,

Provides an electronic power meter according to the present invention characterized in that the secondary battery circuit unit for charging the DC power provided by the power supply unit and providing a DC power charged during power outages is further included in the configuration to achieve the above object. This can be achieved by.

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

2 is a block diagram of a circuit configuration showing the configuration of an electronic electricity meter capable of remote metering by power line communication according to an embodiment of the present invention.

First, referring to FIG. 2, a configuration and operation of an electronic wattmeter according to an embodiment of the present invention are described below.

An electronic power meter according to an embodiment of the present invention includes: a power line modem 12 capable of demodulating a data signal to a low voltage commercial AC power supply and demodulating the data signal included in the commercial AC power supply; Rectifying and stepping down the low voltage commercial AC power to supply a predetermined DC power, or to provide a received low voltage commercial AC power including a data signal conveyed to the power line modem 12, or the modulated signal from the power line modem 12 A power supply circuit unit 13 for outputting the low voltage commercial AC power supply to the low voltage commercial AC power line; A voltage sensing circuit unit 15 for detecting and providing a voltage of the low voltage commercial AC power supply; A current sensing circuit unit 14 for detecting and providing a current of the low voltage commercial AC power supply; A power amount measurement circuit unit 16 which calculates the amount of power by integrating the voltage and current detected from the voltage sensing circuit unit 15 and the current sensing circuit unit 14, and generates and outputs a pulse signal to correspond to the calculated power amount; It is connected to the electric power measuring circuit unit 16 and the power line modem 12, and outputs the integrated pulse signal from the electric power measuring circuit unit 16 for each time and displays the data of the resultant value. A microprocessor (17) for providing data of the accumulated result value to be modulated and output to a low voltage commercial AC power supply; And a display unit 18 connected to the microprocessor 17 for receiving the data of the accumulated result value from the microprocessor 17 and displaying it.

Since the power line modem 12 is a condition to be embedded in the electronic power meter 10, a power line communication chip commercially available in the form of an integrated circuit chip, for example, an integrated circuit chip for power line communication of the Spanish company D, may be used. The circuit board of the commercially available power line modem is about 40 mm (60 mm) to 60 mm in width and can be connected to the internal circuit board of the electronic electricity meter. The detailed configuration and operation of the power line modem 12 itself is well known in various ways and configuration examples, and the description will be omitted since there is a risk of blurring the focus in describing the present invention.

The power supply circuit unit 13 may be configured as a step-down transformer having a smaller number of turns of the secondary coil than the number of turns of the primary coil, for example, to supply a predetermined DC power by rectifying and stepping down a low voltage commercial AC power. And a rectifying circuit such as a bridge diode as the rectifying circuit may be connected to the secondary coil output of the step-down transformer. In addition, the power supply circuit unit 13 is connected to the power line modem 12 to provide a received low voltage commercial AC power supply including the data signal conveyed to the power line modem 12, or the modulated low voltage from the power line modem 12. And a transformer circuit for outputting commercial AC power to a low voltage commercial AC power line.

Specifically, the current sensing circuit unit 14 may be configured as a current transformer connected to the low voltage commercial AC power source, that is, a low voltage power line, to detect and provide a current flowing through the low voltage power line.

The voltage sensing circuit unit 15 may be specifically configured as a displacement transformer (weakly referred to as PT) that detects and provides a voltage applied to the low voltage power line connected to the storage power line.

The power measurement circuit unit 16 is specifically configured as a dedicated integrated circuit that multiplies the detected current from the current sensing circuit unit 14 by the detected voltage from the voltage sensing circuit unit 15 and emits a pulse signal according to the result of the product. Can be.

The microprocessor 17 uses a processing program stored in a built-in ROM (Read Only Memory) and a system clock from a crystal oscillator (not shown) to time a pulse signal according to the amount of power from the power measurement circuit unit 16. Integrating unit by unit to calculate the power consumption (the so-called kilowatt hour power consumption), and accumulate this value to the previous value to store in the RAM (Random Access Memory) built in the microprocessor 17 At the same time, the cumulative power consumption is displayed on the display unit 18, and when the command signal of the power consumption transmission request from the host system 30 is received through the power line modem 12, the accumulated power consumption data is transmitted to the power line modem 12. It modulates to a commercial low voltage AC power supply through the power supply circuit unit 13 to transmit to the host system 30.

The display unit 18 may be generally configured as a liquid crystal display.

Referring to the upper system 30 for reading the power consumption for each generation of the multi-family house in the remote place through the power line communication with the electronic electricity meter 10 according to the present invention.

The upper system 30 is connected to the electronic watt hour meter 10 according to the present invention and the low voltage power line, and transmits the amount of power used through the low voltage line to all generations of the electronic watt hour meter 10. A central control device 31 for receiving a power signal including power consumption data from the generation-specific electronic electricity meter 10 which responds to the command signal and responds to the low voltage power line to separate and output power usage data; It is configured to include a meter reading PC (metering personal computer) 32 connected to the central control unit 31 to receive the power consumption data for each generation provided by the central control unit 31 and accordingly charge the power fee for each generation. do. The central control unit 31 naturally includes a power line modem, an A / D converter for converting a received analog signal into a digital signal, and a microprocessor for processing the received signal converted into a digital signal and providing it to the detector PC 32. It is configured to include a processor (Micro Processor) and the like. The meter PC 32 stores the previous month's electric power consumption data for each generation, and a program capable of analyzing the charging rate, the charging process, and the electric power consumption. Accordingly, for example, the value of the previous month's electric power consumption data is obtained from the newly received electric power consumption data. The amount of electricity consumed by this month is calculated by subtracting and multiplied by the billing rate to determine the billing amount for each household. The upper system 30 is usually installed in a multi-unit house management office in the case of a multi-family house and is operated by the management office staff.

On the other hand, the operation of the electronic power meter according to the present invention configured as described above are as follows.

If the management office staff instructs the meter reading of the electricity consumption by household using the metering PC 32 to determine the billing amount for each household according to the monthly electricity consumption by the previous month on a certain date, it is connected to the meter reading PC 32. The central control unit 31 transmits the command signal requesting the transmission of the power consumption together with the unique identification information for each generation to the electronic power meter of each generation through the low voltage power line.

Then, the power supply circuit unit 13 directly connected to the low voltage power line receives the command signal in the commercial low voltage AC power signal (hereinafter, referred to as a power signal) and provides it to the power line modem 12.

The power line modem 12 demodulates the command signal from the received power signal and the modulated signal of the command signal, and provides the command signal to the microprocessor 17.

Accordingly, the microprocessor 17 reads the accumulated power consumption data stored in the storage means such as the RAM and transmits the data to the upper system 30 through the power line modem 12, the power supply circuit 13, and the low voltage power line. .

Thereafter, the upper system 30 charges the power usage fee according to the power consumption by generation by the configuration and method as described above.

The current sensing circuit unit 14 and the voltage sensing circuit unit 15 are connected to a low voltage power line for each generation to continuously detect currents and voltages according to power consumption for each generation irrespective of the request of the upper system 30, and likewise, a power amount measurement circuit portion (16) also continuously multiplies the detected current and voltage to provide a corresponding pulse signal to the microprocessor (17).

As described above, the microprocessor 17 adds the amount of power used according to the accumulated amount of the pulse signal to a previous amount of used power and stores the same in the storage means such as the RAM, and the user for each generation confirms the result through the display unit 18. Mark it so you can

On the other hand, the configuration and operation of the electronic electricity meter according to another embodiment of the present invention with reference to FIG.

3 is a block diagram of a circuit configuration showing the configuration of an electronic power meter capable of remote metering by power line communication according to another embodiment of the present invention.

Components overlapping with the configuration of the above-described embodiment of the electronic power meter according to another embodiment of the present invention of FIG. 3 will be omitted in order to avoid duplication of description, and the newly added components will be described. As follows.

If the above-described embodiment of the present invention is characterized by an electronic power meter capable of remotely reading power generation for each generation through power line communication by embedding a power line modem, another embodiment of the present invention is a water meter, a gas meter, a calorimeter. The electric power meter collects the metering data of the facility meter, such as a hot water meter and displays it by the built-in display unit, and the electric power meter capable of transmitting the metering data of the facility meter to the upper system 30. Is there.

In addition, another embodiment of the present invention is characterized in that the configuration that can preserve the long-term metering data during power outages.

Another embodiment of the present invention is connected to at least one of the gas meter, calorimeter, water meter of the facility meter, the facility meter pulse input for receiving a pulse signal of the measured value from at least one of them and converts it into a digital signal to provide Section 19; It is connected to the facility meter pulse input unit 19 to receive a digital signal according to the input pulse signal from the facility meter pulse input unit 19, and outputs it by integrating it, and is connected to a power line modem (data to be transmitted to the power line communication modem). A second microprocessor 17b for providing a digital signal, which is connected to the second microprocessor 17b, to display on the display unit 18 a digital signal of the metered value of the facility meter from the second microprocessor 17b. A first microprocessor (17a) for outputting data of the integrated value to the second microprocessor (17b) to be transmitted through the power line modem (12); And a display unit 18 capable of additionally displaying the meter value of the facility meter provided by the microprocessor 17a.

According to another embodiment of the present invention, the function of the second microprocessor 17b is specialized for integrating the metered value of the facility meter as described above, and the first microprocessor 17a is specialized for power measurement and display unit control. Have

The second microprocessor 17b receives the metering data for each facility meter through the facility meter pulse input unit 19 and accumulates it, and stores the data of the integration meter for each facility meter in a storage means such as a built-in RAM, not shown.

The facility meter pulse input unit 19 is connected to at least one of a gas meter, a calorimeter, and a water meter in a city, and receives an analog pulse signal from the facility meter and converts the analog pulse signal into a digital signal. 17b) may be composed of a circuit of the pulse receiving and A / D converter.

The secondary battery circuit unit 13-1 specifically includes a secondary battery including any one of a lithium ion (Li-ion) battery, a nickel hydride (Ni / MH) battery, a polymer battery, and a nickel cadmium (Ni / Cd) battery. It may consist of a battery and its output circuit.

Referring to the operation of another embodiment of the present invention configured as described above are as follows.

In order to determine the billing amount for each household according to the monthly electricity consumption, gas consumption, hot water usage, and water usage of the previous month, the management office staff instructs the meter reading of the household usage using the meter PC 32. The central control device 31 connected to the meter reading PC 32 transmits the command signal requesting transmission of the usage amount for each generation along with generation-specific identification information to the electronic power meter 10 of each generation through the low voltage power line. Send.

Then, the power supply circuit unit 13 directly connected to the low voltage power line receives the command signal in the commercial low voltage AC power signal (hereinafter, referred to as a power signal) and provides it to the power line modem 12.

The power line modem 12 demodulates the command signal from the received power signal and the modulated signal of the command signal to provide the command signal to the second microprocessor 17b and the second microprocessor 17b. Also provides the command signal to the first microprocessor 17a.

In response to the command signal, the first microprocessor 17a and the second microprocessor 17b read the accumulated power consumption and data for each meter of the meter stored in the storage means such as the RAM, and the power line modem 12 and the power supply circuit unit. 13 and the low voltage power line to the host system 30.

Thereafter, the upper system 30 charges a usage fee according to the usage amount of each household by the configuration and method as described above.

As described above, the first microprocessor 17a adds the amount of power used according to the accumulated amount of the pulse signal and the integrated meter-specific accumulated data provided by the second microprocessor 17b to a previous usage amount as described above. It is stored in the storage means and displayed through the display unit 18 so that the user for each generation can confirm.

In the above described exemplary embodiments of the present invention by way of example, the scope of the present invention is not limited only to these specific embodiments, it can be appropriately changed within the scope described in the claims of the invention.

As described above, the integrated electronic electricity meter which can be remotely read by power line communication according to the present invention can reduce the installation space and simplify the installation process by incorporating means for power line communication. Built-in means to receive the metering data of the facility meter and store and display it for each facility meter so that the metering data and power usage data of the facility meter can be checked in one electronic meter, the effect of remote meter reading and accordingly There is no need for a separate generation terminal for metering data aggregation, thereby reducing the installation space and simplifying the installation process. In addition, there is an effect that the risk of losing the weighing data even in a long power outage can be eliminated by incorporating a secondary battery circuit unit.

Claims (4)

In the electronic electricity meter, A power line modem capable of demodulating the data signal to the low voltage commercial AC power supply and demodulating the data signal included in the commercial AC power supply; Rectifying and stepping down the low voltage commercial AC power supply to supply a predetermined DC power supply, or providing a received low voltage commercial AC power supply including the data signal conveyed to the power line modem, or modulating the low voltage commercial AC power supply from the power line modem. A power supply circuit unit for outputting the power to a low voltage commercial AC power line; A voltage sensing circuit unit for detecting and providing a voltage of the low voltage commercial AC power supply; A current sensing circuit unit for detecting and providing a current of the low voltage commercial AC power supply; A power amount measurement circuit unit which calculates an amount of power by integrating the voltage and current detected from the voltage sensing circuit unit and the current sensing circuit unit, and generates and outputs a pulse signal to correspond to the calculated amount of power; It is connected to the power measurement circuit section and the power line modem, and outputs the data of the result value obtained by integrating and integrating the pulse signal over time from the power measurement circuit section, and modulating and outputting the low voltage commercial AC power to the power line modem. A microprocessor for providing data of the integrated result value to make; And a display unit connected to the microprocessor and configured to receive and display data of the accumulated result value from the microprocessor. The method of claim 1, A facility meter pulse input unit connected to at least one facility meter of a gas meter, a calorimeter, and a water meter, for receiving a pulse signal of a measured value from at least one of them, and converting the resultant signal into a digital signal; Another microprocessor connected to the facility meter pulse input unit for receiving a digital signal according to an input pulse signal from the facility meter pulse input unit and integrating it to provide the power line modem; Electronic power meter, characterized in that further comprises. The method of claim 1, A facility meter pulse input unit connected to at least one facility meter of a gas meter, a calorimeter, and a water meter, for receiving a pulse signal of a measured value from at least one of them, and converting the resultant signal into a digital signal; Another microprocessor connected to the facility meter pulse input unit to receive a digital signal according to an input pulse signal from the facility meter pulse input unit, integrating and outputting the digital signal, and connected to the power line communication modem to provide data to be transmitted to the power line modem; ; Connected to the other microprocessor, outputting a digital signal for the metered value of the facility meter from the other microprocessor to display on the display unit, and outputting the data of the integrated value to the other microprocessor in the power line modem; The microprocessor outputting to transmit through the; And a display unit connected to the microprocessor, the display unit capable of additionally displaying the metering value of the facility meter provided by the microprocessor. The method of claim 1, And a secondary battery circuit unit configured to charge the DC power provided by the power supply unit and provide the DC power charged during power failure.

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