KR101649897B1 - Apparatus for remotely measuring gas meter and supplying power to gas meter using power line communication manner, and method thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote metering and power supply apparatus for a gas meter using a power line communication method and a method thereof.
The remote meter reading and power supply device of the gas meter using the power line communication method according to the present invention receives the communication signal for remote meter reading of the gas meter from the gas supplier server and transmits the communication signal to the lower layer, And transmits a communication signal for remote meter reading of the gas meter and a power signal for charging the battery supplying power to the electric power and gas meter for PLC communication to the gas meter side A communication unit for receiving the meter reading information from the gas meter side and transmitting the meter reading information to the remote meter reading and monitoring unit, and a battery for receiving the power signal from the communication unit and transmitting the power signal to the PLC communication electric power and gas meter, Receives the communication signal from the gas meter, By a battery charging circuit and a remote meter reading so that the remote reading of a gas meter made.
According to the present invention, it is possible to apply the present invention to an existing gas meter, and it is possible to supply power for general operation of the gas meter and the remote meter reading for a long time even if a small backup battery is used.

Description

Technical Field [0001] The present invention relates to a remote meter reading and power supply apparatus for a gas meter using a power line communication method,

The present invention relates to a remote metering and power supply apparatus and method for a gas meter, and more particularly, to a remote meter reading method and a gas meter using the power line communication (PLC) The present invention relates to a remote metering and power supply apparatus for a gas meter using a power line communication method capable of supplying power for operation and a method thereof.

The city gas supply system is based on weight. In other words, city gas transactions between city gas companies (retailers) in each region that sell city gas directly to consumers and Korea Gas Corporation (wholesalers) that supply city gas to these companies are liquefied gas, Therefore, the transaction fee is calculated in weight units.

As described above, the supply system of city gas is based on a certain weight. However, when the city gas is supplied to the general customer, the state of the gas is in a state of gaseous state. Urban gas suppliers supply city gas to consumers at constant temperature and pressure, and use capacitive gas meters to measure the volume of city gas. In particular, as a gas meter for domestic use, a membrane gas meter, which is a kind of a capacitive gas meter, is mainly used.

On the other hand, there is a problem that an irregular error occurs between the quantity of gas purchased from the KOGAS and the quantity of gas sold to its customers. There are various causes of the error between the gas purchase amount and the sales amount of the city gas company. The most important causes are the temperature and pressure reference values applied when the city gas company sends gas from the local regulator to each customer and the error between the temperature and pressure values at the actual gas meter in the customer gas meter. In Korea, the reference temperature and pressure are 0 ° C and 1 atm, and the gas is sent at a gauge pressure of 20 to 25 millibars in the regulator considering the reduction of the gas pressure from the regulator to the gas meter of each customer. As the density of the gas changes due to the influence of ambient temperature and atmospheric pressure while the city gas is being transported through the piping to each customer, the meter reading of the gas meter varies according to the season and day and night. Also, since the internal volume measuring vessel of the capacity type gas meter is flexible, the reading value varies depending on the temperature and the pressure of the surroundings. This causes economic loss for the supplier or the customer. Other causes of weighing error include tolerance of gas gauge installed in each customer and gas leakage.

In consideration of this point, conventionally, a sensor for measuring the temperature and pressure of the supply gas is separately provided, and a pressure compensator for receiving the measured value from each sensor and correcting the meter reading value measured by the gas meter is separately provided to the gas meter And the corrected meter reading value is transmitted to the gas supply company through the communication unit and operated.

However, in the conventional remote meter reading method as described above, a temperature sensor, a pressure sensor and a compensator must be installed separately from the gas meter, and an interface is required between the gas meter and the compensator and between each sensor and the compensator, There is a problem that the volume is large and the cost is increased because of the complexity and the large number of parts.

In addition, a magnetic sensor, an ultrasonic sensor, a pulse counter, or the like is generally used for the interface. When the data is transmitted through such an interface, the interface can not be accurately transmitted and an error occurs.

Korean Patent Laid-Open Publication No. 10-2014-0124292 (Prior Art 1) discloses a system in which a basic usage amount by a gas meter and a standard usage amount by a pressure compensator are received from a pressure compensator, a standard based on the basic usage amount and a standard based on the standard usage amount Korean Patent No. 10-0811239 (Prior Art 2) discloses a system and a method for imposing a gas rate by calibrating a pressure difference on a user side, Correcting the 'pressure error', which is the city gas usage error that can occur due to the difference between the temperature and pressure of the city gas passing through the metering capacity meter and the temperature and pressure applied by the city gas supplier at the supply reference point, "Temperature Pressure Error Correction Device for Capacity-Type City Gas Meter with Automatic Meter Reading Function" It is.

However, the systems and apparatuses of the prior art documents 1 and 2 as described above have a structure in which a separate compensator is installed to continuously perform meter reading and communication, and accordingly, a large amount of electric power is required. As a result, Parts are required. Therefore, there is a problem that the installation position is restricted, the configuration is complicated, and the power consumption is increased.

Korean Patent Publication No. 10-2014-0124292 (published Oct. 24, 2014) Korean Patent No. 10-0811239 (published on Mar. 10, 2008)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a power meter capable of measuring a gas meter remotely using a power line communication (PLC) A remote meter reading and power supply device for a gas meter using a communication method, and a method thereof.

In order to achieve the above object, there is provided a remote meter reading and power supply apparatus for a gas meter using a power line communication method, A remote meter reading and monitoring unit for receiving a communication signal and transmitting the communication signal to a lower layer, receiving meter reading information of a gas meter from a lower layer, and transmitting the meter reading information to the gas supplier server, And a communication signal for remote meter reading of the gas meter and a power signal for charging the battery for supplying electric power to the gas meter are transmitted to the gas meter side and the meter reading information is received from the gas meter side, And a gas meter, which is installed at a predetermined portion of the gas meter, The control unit receives the power signal from the first communication unit and transmits the power signal to the PLC communication power and the battery meter for supplying electric power to the gas meter so as to charge the battery and receives the communication signal from the communication unit and transmits the communication signal to the gas meter, Battery charging and remote meter reading circuitry.

Here, the communication unit may be configured to transmit a power signal for charging a battery for supplying electric power to the PLC communication electric power and gas meter, a communication signal for remote meter reading of the gas meter by a PLC (Power Line Communication) communication method, A communication circuit for transmitting and receiving meter reading information from the gas meter side, and a power supply circuit for supplying electric power for PLC communication of the communication circuit.

The communication circuit unit may include a first communication port for transmitting and receiving signals to and from the remote meter reading and monitoring unit, a second communication port for transmitting and receiving signals to and from the battery charging and remote meter reading circuit unit, A communication circuit driving section for driving the communication circuit to receive the communication signal so that remote meter reading can be performed when the signal is inputted; and a communication circuit driving section for switching the communication signal transmission mode in the normal power signal transmission mode, And a selection switch section that operates.

Here, the input terminal of the selection switch unit is connected to a normal close (NC) contact point inside the selection switch unit, and when a communication signal is inputted through the first communication port, Outputs the communication signal via the second communication port by opening the closed contact and closing the normal open (NO) contact, thereby connecting the first communication port and the second communication port.

The battery charging and remote meter-checking circuit unit includes a battery charging circuit for charging the battery by receiving a power signal from the communication unit and transmitting the power signal to the PLC communication power and gas meter, , And DATA-) to the gas meter, thereby enabling remote meter-reading of the gas meter.

The battery charging circuit unit includes a bridge diode for receiving a voltage (power signal) supplied from the power supply circuit unit of the communication unit and performing full wave rectification, a regulator for receiving a voltage output from the bridge diode, And a diode for allowing a current according to an output voltage from the regulator to flow to the battery and preventing a reverse current flow from the battery to the regulator.

The remote meter-checking circuit includes a battery power input terminal for receiving power from the battery, plus (+) side signals (DATA +) and minus (-) side signals (DATA- And a receiving terminal for receiving a response signal to the remote meter reading and control command from the gas measuring unit, and a receiving terminal for receiving a response signal to the remote meter reading and control command from the gas measuring unit, And the like.

In order to accomplish the above object, a remote meter reading and power supply method of a gas meter using a power line communication method according to the present invention includes: a power signal for charging a battery supplying electric power to a gas meter; A communication unit for transmitting a communication signal for controlling the gas meter to the gas meter side and receiving meter reading information from the gas meter side and transmitting the meter reading information to the remote meter reading and monitoring unit; Remote meter reading of a gas meter using a power line communication system including a battery charging and remote meter reading circuit for transmitting a communication signal from a communication unit to a gas meter and performing a remote meter reading of the gas meter, And a power supply method comprising the steps of: a) B) a DC voltage output from the power supply circuit unit is input through an input terminal of the selection switch unit of the communication unit, and the DC voltage is supplied to the power supply circuit unit of the communication unit Supplying the battery to the battery charging circuit of the gas meter through the second communication port of the communication unit to charge the battery; c) if a communication signal is inputted through the first communication port of the communication unit during the charging of the battery, Disconnecting the DC voltage (power signal) output through the second communication port by the switching operation of the selection switch unit and outputting the communication signal through the second communication port, and d) Is received by the remote meter-reading circuit unit of the gas meter and is transmitted to the gas meter of the gas meter There is characterized in that it includes the step of performing a remote inspection of the gas meter.

If a communication signal is inputted through the first communication port of the communication unit in the step c), before the DC voltage (power signal) output through the second communication port is blocked by the switching operation of the selection switch unit And supplying the communication signal to the communication circuit driving unit of the communication unit to operate the communication circuit driving unit.

When the remote meter-reading in step d) is completed, the connection state of the first communication port and the second communication port is released by the switching operation of the selection switch unit, and the original state of charging the battery of step b) And returning to the state.

According to the present invention as described above, there is provided a power supply circuit for power line communication, a battery charging circuit for supplying power from the power supply circuit and a rechargeable battery for charging the battery, It is possible to apply the present invention to an existing gas meter and to use it for a long time even if a small backup battery is used.

1 is a diagram schematically showing the overall system configuration of a remote meter reading and power supply apparatus of a gas meter using a power line communication method according to the present invention.
FIG. 2 is a diagram showing the configuration of a communication meter of the communication unit of the power supply apparatus and the remote meter reading of the gas meter using the power line communication system shown in FIG. 1.
FIG. 3 is a view showing the configuration of a power meter of the power meter communication system shown in FIG. 1 and a power supply circuit of the communication unit of the power supply device.
FIG. 4 is a view showing a configuration of a remote meter reading of a gas meter using the power line communication system shown in FIG. 1 and a battery charging and remote meter reading circuit of a power supply device.
FIG. 5 is a flowchart illustrating an operation of a remote meter reading and power supply method of a gas meter using a power line communication method according to the present invention.

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

1 is a diagram schematically showing an overall system configuration of a remote meter reading and a power supply apparatus of a gas meter using a power line communication method according to an embodiment of the present invention.

Referring to FIG. 1, an automatic meter reading and power supply apparatus 100 for a gas meter using a power line communication method according to the present invention includes an automatic meter reading and monitoring unit 110, a communication unit 120, and a battery charging and remote meter reading circuit unit 134).

The remote meter reading and monitoring unit 110 receives a communication signal for remote meter reading of the gas meter 130 from the gas supplier server 90 and transmits the communication signal to the lower layer and the meter reading information of the gas meter 130 from the lower layer And transmits it to the gas supplier server 90. As the remote meter reading and monitoring unit 110, a general PC can be used. The remote meter reading and monitoring unit 110 may be installed in a management room of an apartment or a large commercial building, or may be installed on the gas supplier server 90 side.

The communication unit 120 is installed in proximity to the remote meter-monitoring and monitoring unit 110 and is configured to charge a battery 414 (see FIG. 4) for supplying electric power and gas meter 130 for PLC (Power Line Communication) From the remote meter reading and monitoring unit 110 and transmits a power signal for the gas meter 130 and a communication signal for remote meter reading of the gas meter 130 to the gas meter 130, And transmits it to the remote meter reading and monitoring unit 110. In this case, an RS-232C communication method may be used for communication between the remote meter-monitoring and monitoring unit 110 and the communication unit 120, and an RS-485 communication method may be used for the PLC communication method between the communication unit 120 and the gas meter 130. [ Method can be used.

The communication unit 120 may include the communication circuit unit 122 and the power supply circuit unit 124. The communication circuit unit 122 transmits a power signal for charging the battery communication apparatus for electric power and gas meter 130 for PLC communication (see FIG. 4) for supplying electric power to the PLC communication apparatus, And transmits and receives a communication signal for remote meter reading and meter reading information from the gas meter 130 side.

2, the communication circuit unit 122 includes a first communication port 201 for transmitting and receiving signals to and from the remote meter-monitoring and monitoring unit 110, a battery charging and remote meter-checking circuit unit 134 (DATA +, DATA-) is input through the first communication port 201, the second communication port 202 receives the communication signals (DATA +, DATA-) A communication circuit driving section 203 for driving a communication circuit so that remote meter reading can be performed and a selection switch section 204 for switching to a communication signal transmission mode in a normal power signal transmission mode in accordance with driving of the communication circuit driving section And the like.

At this time, as the communication signals (DATA +, DATA-), for example, an electric signal having a current value of 0.2 mA and a voltage value of ± 5 V can be used. The selection switch unit 204 may be a relay RY1. The input terminal of the selection switch unit 204 is connected to a normal close (NC) contact (a contact b, points 3 and 10 in the figure) inside the selection switch unit 204, When the communication signal is inputted through the first communication port 201, the selection switch unit 204 opens the normal closed contact (b contact) by the switching operation and opens the normally open (NO) contact a The first communication port 201 and the second communication port 202 are connected to each other through the second communication port 202 so that the communication signal .

The power supply circuit unit 124 supplies power for the PLC communication of the communication circuit unit 122. The power supply circuit unit 124 may have a circuit configuration as shown in FIG. 3, and it functions as a kind of DC / DC converter. At this time, a power supply (for example, 12 to 24 V) supplied from an external power supply device (for example, an adapter or a general-purpose SMPS) is input to the input terminal of the power supply circuit portion 124.

The battery charging and remote meter reading circuit unit 134 is installed in a predetermined part of the gas meter 130 (for example, inside the gas meter) and receives a power signal (for example, a voltage of 8V) And receives the communication signals (DATA +, DATA-) from the communication unit 120 and transmits the communication signals (DATA +, DATA-) to the electric power and gas meter 130 for the PLC communication to the battery 414 side And transmits it to the meter 130 so that the remote meter reading of the gas meter 130 is performed. As such a gas meter equipped with the battery charging and remote meter reading circuit unit 134, a gas pressure integrated gas meter, a digital gas meter, a general gas meter, an integrated gas meter, or the like can be used.

The battery charging and remote meter reading circuit unit 134 may include a battery charging circuit unit 410 and a remote meter reading circuit unit 420 as shown in FIG.

The battery charging circuit unit 410 receives the power signal from the communication unit 120 and transmits the power signal to the battery communication power supply and the battery 414 that supplies power to the gas meter 130 to thereby charge the battery 414. [ The battery charging circuit unit 410 includes a bridge diode 411 for receiving the voltage (power signal) supplied from the power supply circuit unit 124 of the communication unit 120 and performing full wave rectification, a voltage output from the bridge diode 411 And a regulator 412 for regulating the output voltage of the regulator 412 to a predetermined voltage value (for example, 8V) and outputting a current corresponding to the output voltage from the regulator 412 to the battery 414, And a diode 413 for preventing a reverse current flow from the regulator 412 to the regulator 412.

The remote meter-reading circuit unit 420 receives the communication signals (DATA +, DATA-) from the communication unit 120 and transmits the communication signals (DATA +, DATA-) to the gas measuring unit 132 of the gas meter 130 to perform remote meter reading of the gas meter 130 Respectively. The remote meter reading circuit unit 420 includes a battery power input terminal VCC_BAT for receiving power from the battery 414 and a positive (+) side signal (DATA +) and a negative (-) side signal A transmission terminal for transmitting the remote meter reading and other control command signals TXD to the gas measuring unit 132 of the gas meter 130 and a transmission terminal for receiving the remote meter reading and other control command signals TXD from the gas measuring unit 132 And an integrated circuit 421 having a reception terminal for receiving a response signal RXD to the remote meter reading and control command. However, the remote meter reading circuit unit 420 is not limited to being constructed of such an integrated circuit 421, and in some cases, it may be composed of other electronic parts or circuits.

Hereinafter, a remote meter reading and power supply method of the gas meter using the power meter communication method using the power line communication method according to the present invention will be described briefly.

FIG. 5 is a flowchart illustrating a process of performing an automatic meter reading and power supply method of a gas meter using a power line communication method according to an embodiment of the present invention.

Referring to FIG. 5, the remote meter reading and power supply method of the gas meter using the power line communication method according to the present invention includes charging (charging) a battery 414 for supplying power to the power and gas meter 130 for PLC communication And transmits a communication signal for remote meter reading of the gas meter 130 to the gas meter 130 side and receives the meter meter information from the gas meter 130 to perform a remote meter reading and monitoring unit 110, And transmits a power signal from the communication unit 120 to the battery 414 to charge the battery and transmits a communication signal from the communication unit 120 to the gas meter 130, And a battery charging and remote meter reading circuit unit (134) for performing a remote meter reading of the meter), and a remote meter reading and power supply device of the gas meter (For example, DC 12 to 24 V) of a predetermined magnitude from the outside is supplied to the power supply circuit unit 124 of the communication unit 120 and converted into a DC voltage of a different magnitude (Step S501). That is, the power supply circuit unit 124 of the communication unit 120 receives a DC voltage of, for example, 12 to 24 V from an external power supply device (for example, an adapter or a general-purpose SMPS) and outputs a DC voltage of 8 V .

When the DC voltage is output from the power supply circuit 124 in this manner, the output DC voltage is input through the input terminal of the selection switch 204 of the communication circuit unit 122 of the communication unit 120, To the battery charging circuit unit 410 of the battery charging and remote meter-checking circuit unit 134 of the gas meter 130 via the second communication port 202 of the communication circuit unit 122 of the communication circuit unit 122 to charge the battery 414 (Step S502).

When the communication signals (DATA +, DATA-) are inputted through the first communication port 201 of the communication circuit unit 122 of the communication unit 120 while charging the battery 414 as described above, the communication signals (DATA + , DATA-) to the communication circuit driving unit 203 of the communication circuit unit 122 of the communication unit 120 to operate the communication circuit driving unit 203 (step S503). That is, when the communication signals (DATA +, DATA-) input through the first communication port 201 are transmitted to the communication circuit driving unit 203, the P-channel type-MOSFET Q1 and the N- -MOSFET Q2 sequentially operate so that a current flows to the field coil of the selection switch unit 204. [ Then, the core of the field coil is magnetized, and accordingly, the contact (No. 10, No. 2, No. 4, No. 9 in the figure) touching the selection switch (relay) , 3) and come into contact with the contacts (8 and 5) on the upper side, respectively.

Accordingly, the output of the DC voltage (power signal) output through the second communication port 202 is cut off by the switching operation of the selection switch unit 204, And outputs communication signals (DATA +, DATA-) (step S504).

When the communication signals (DATA +, DATA-) are outputted through the second communication port 202 of the communication unit as described above, the communication signals (DATA +, DATA-) are transmitted to the battery charging and remote meter- (Step S505). The remote meter reading unit 420 receives the signal from the remote meter reading unit 420 through the communication port 401 of the gas meter, and transmits it to the gas measuring unit 132 of the gas meter to perform remote meter reading of the gas meter (step S505). That is, when the communication signals (DATA +, DATA-) for remote meter reading are transmitted to the gas measuring unit 132, the microprocessor (not shown) inside the gas measuring unit 132 transmits the communication signals (DATA +, DATA-) And transmits the result of the meter reading to the remote meter reading circuit unit 420. [ Then, the remote meter-reading circuit unit 420 transmits the meter reading result (data) signal to the communication unit 120 via the communication port 401, and the communication unit 120 transmits the meter reading result (data) (110). Then, the remote meter reading and monitoring unit 110 displays the meter reading result (data) on the monitor screen and transmits it to the gas supplier server 90.

When the remote meter reading is completed in this way, the connection state of the first communication port 201 and the second communication port 202 is released by the switching operation of the selection switch unit 204, and the battery in step S502 is charged (Step S506). That is, when the remote meter-reading is completed, the input of the communication signals (DATA +, DATA-) to the first communication port 201 of the communication unit 120 is stopped, Q1) and the N-channel type-MOSFET (Q2) are stopped in order. Then, no current flows through the field coil of the selection switch unit 204, and as a result, the magnetizing force of the core of the field coil is lost. As a result, the selection switch (4th, 9th in the drawing) of the selection switch unit 204 (relay) returns to the initial state (that is, returns to the contact state with the normally closed contact). Accordingly, the output of the communication signals (DATA +, DATA-) output through the second communication port 202 is stopped and the DC voltage (power signal) is output again through the second communication port 202, And returns to the original state of charging.

As described above, the remote meter reading and power supply device of the gas meter using the power line communication method according to the present invention has a relatively simple circuit configuration including a power supply circuit for power line communication, And a remote meter reading circuit portion that operates by receiving power from a rechargeable battery of the battery charging circuit portion is installed and can be used as it is in a conventional gas meter and can be used as it is. Even if a small backup battery is used, And power for normal operation of the gas meter.

In addition, since the configuration of the battery charging and remote meter reading circuit is simple and integrated in the PCB, it can be easily installed and used in a conventional gas meter. Accordingly, the installation position is not restricted, the overall configuration of the gas meter is not complicated, There is an advantage that consumption can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the spirit and scope of the invention. Be clear to the technician. Accordingly, the true scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of the same should be construed as being included in the scope of the present invention.

100: Remote meter reading and power supply of gas meter
110: remote meter reading and monitoring unit 120:
122: communication circuit section 124: power supply circuit section
130: gas meter 132: gas meter
134: Battery charging and remote meter reading circuit
201: first communication port 202: second communication port
203: communication circuit driving unit 204: selection switch unit
401: communication port 410: battery charging circuit
411: bridge diode 412: regulator
413: diode 414: battery
420: remote meter reading circuit section 421: integrated circuit

Claims (10)

A remote meter reading and power supply for a gas meter,
A remote meter reading and monitoring unit for receiving a communication signal for remote meter reading of the gas meter from the gas supplier server and transferring the communication signal to the lower layer, receiving the meter reading information of the gas meter from the lower layer,
And transmits a power signal for charging the battery for supplying electric power to the electric power and gas meter for PLC communication and a communication signal for remote meter reading of the gas meter to the gas meter side, And transmits the received meter reading information to the remote meter reading and monitoring unit; and
The power meter is installed in a predetermined portion of the gas meter, receives the power signal from the communication unit, and transmits the power to the PLC communication power meter and the battery meter that supplies power to the gas meter, thereby charging the battery, receiving the communication signal from the communication unit, A remote meter reading and power supply device for a gas meter using a power line communication system including a battery charging and remote meter reading circuit for enabling remote meter reading of a gas meter. The method according to claim 1,
Wherein,
Transmission of a power signal for charging a battery supplying electric power to the PLC communication electric power and gas meter, transmission and reception of a communication signal for remote meter reading of the gas electric meter by a PLC (Power Line Communication) communication method, A communication circuit for transmitting and receiving meter reading information, and
And a power supply circuit unit for supplying power for PLC communication of the communication circuit unit. 3. The method of claim 2,
The communication circuit unit includes:
A first communication port for transmitting and receiving signals to and from the remote meter reading and monitoring unit,
A second communication port for transmitting and receiving signals to and from the battery charging and remote meter reading circuit,
A communication circuit driver for driving a communication circuit to receive a communication signal when the communication signal is inputted through the first communication port,
And a selection switch unit for switching to a communication signal transmission mode in a normal power signal transmission mode in accordance with driving of the communication circuit driving unit. The method of claim 3,
The input terminal of the selection switch unit is connected to a normal close (NC) contact point inside the selection switch unit. When a communication signal is input through the first communication port, the selection switch unit switches the normally closed contact And the communication signal is outputted through the second communication port by connecting the first communication port and the second communication port by closing the normally open (NO) contact, Remote meter reading and power supply of gas meter using. The method according to claim 1,
The battery charging /
A battery charging circuit for charging the battery by receiving a power signal from the communication unit and transmitting the power signal to the battery for supplying power to the PLC communication meter and the gas meter,
And a remote meter reading circuit unit for receiving the communication signals (DATA +, DATA-) from the communication unit and transferring the communication signals (DATA +, DATA-) to the gas meter so as to perform remote meter reading of the gas meter. 6. The method of claim 5,
The battery charging circuit unit includes:
A bridge diode for receiving the voltage (power signal) supplied from the power supply circuit portion of the communication unit and performing full wave rectification,
A regulator for receiving a voltage output from the bridge diode, adjusting the voltage to a predetermined voltage value and outputting the voltage,
And a diode for allowing a current according to an output voltage from the regulator to flow to the battery and preventing a reverse current flow from the battery to the regulator, and a remote meter reading and power supply for the gas meter using the power line communication method. 6. The method of claim 5,
The remote meter reading circuit unit includes a battery power input terminal for receiving power from the battery and a positive (+) side signal (DATA +) and a minus (-) side signal (DATA-) of the communication signals A transmission terminal for transmitting remote meter reading and other control command signals to the gas measurement unit of the gas meter, and a reception terminal for receiving a response signal to the remote meter reading and control command from the gas measurement unit Remote meter reading and power supply of gas meter using power line communication system composed of integrated circuits. A power meter for charging a battery for supplying power to the gas meter and a communication signal for remote meter reading of the gas meter are transmitted to the gas meter side and the meter meter information is received from the gas meter side to be transmitted to the remote meter reading and monitoring unit A communication unit; And a battery charging and remote meter-reading circuit unit for charging the battery by transmitting a power signal from the communication unit to the battery, and communicating a communication signal from the communication unit to the gas meter to perform remote meter- A method for remote metering and power supply of a gas meter by a remote meter reading and a power supply device using a gas meter,
a) converting a direct-current voltage of a predetermined magnitude from the outside into a direct-current voltage of a different magnitude supplied by the power supply circuit portion of the communication section and outputting the direct-
b) receiving a DC voltage output from the power supply circuit unit through an input terminal of a selection switch unit of the communication unit and supplying the DC voltage to the battery charging circuit unit of the gas meter via a second communication port of the communication unit to charge the battery;
c) When a communication signal is input through the first communication port of the communication unit during charging the battery, the DC voltage (power signal) output through the second communication port is blocked by the switching operation of the selection switch unit , Outputting the communication signal via the second communication port, and
and d) receiving a communication signal output from the second communication port by a remote meter reading circuit unit of the gas meter and transferring the communication signal to a gas measurement unit of the gas meter to perform remote meter reading of the gas meter, Remote meter reading and power supply method of meter. 9. The method of claim 8,
Wherein in the step c), when a communication signal is input through the first communication port of the communication unit, before the DC voltage (power signal) output through the second communication port is blocked by the switching operation of the selection switch unit, And supplying the communication signal to the communication circuit driving unit of the communication unit to operate the communication circuit driving unit. 9. The method of claim 8,
Wherein the connection state of the first communication port and the second communication port is released by the switching operation of the selection switch unit when the remote meter reading in step d) is completed, Further comprising the step of returning the power meter to the power meter.

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