KR101006905B1 - Integration modem and remote reading method for remote meter reading system - Google Patents

Abstract

PURPOSE: An integration modem for a remote checking system and a method for remotely checking are provided to integrate data of a plurality of watt-hour meters and transmit reprocessed data to a remote checking server, thereby minimizing the load. CONSTITUTION: A data processing unit removes the common part from each data of electronic watt-hour-meter. If a data request is received from a remote checking server(30), the data processing unit extracts meter check data. The data processing unit forms processing one frame by sequential arrangement of the extracted checking data. The data processing unit generates on transmission data about the remote checking server.

Description

Integration modem and remote reading method for remote meter reading system

The present invention relates to an integrated modem and a remote meter reading method for a remote meter reading system. More particularly, the present invention relates to an integrated modem and a remote metering method for efficiently and quickly processing data exchange between a remote metering server and an electronic electricity meter in a remote metering system.

Development of a remote meter reading system that can perform electricity, water, gas meter reading at a remote location by wire or wireless. In addition, in the electric field, an independent system for remote meter reading or a separate system for each task has been developed.

The remote metering system automatically reads the meter at the remote metering center without using the meter to visit the household directly.The meter reads the amount of electricity, gas, water, hot water, and calories installed in the apartment house or office. It means a system that can search and print.

The remote meter reading system has several advantages, such as simplifying office work, managing energy demand, managing safety, and maximizing business efficiency.

Current remote metering system is largely divided into pulse type and digital type. Pulse type can be implemented at low cost by using a conventional mechanical meter, but the amount of electricity (electrical , Water, gas, etc.) may cause an error. On the other hand, the digital method has an advantage that accurate meter reading can be performed because the amount displayed on the digital meter and the amount notified to the remote meter are matched using the digital meter.

On the other hand, the modem for transmitting the meter reading data from the electricity meter to the remote meter reading center in the conventional remote metering system communicates one-to-one with the meter, and without the process of data processing, storage, etc. remote meter reading data from the meter In addition, the data concentrator was used to transmit data using a public communication network.

However, due to the introduction of integrated metering and smart grids, the amount of data to be transmitted to the remote metering server is increasing, and the role of the existing modem has to be passive. It causes problems such as down. In addition, there is a problem that the communication fee may be imposed excessively on the power producer (or power consumer) as the amount of data transmission increases.

The present invention has been proposed to solve the above problems,

In the situation where unified metering protocol is unified to realize unified metering or smart grid, data transfer amount is integrated by reprocessing each data transmitted from multiple electricity meters and transmitting the processed data to a remote metering server It is an object of the present invention to provide an integrated modem and a remote metering method that can minimize communication charges and modem load.

In addition, the present invention provides a method for connecting a power line of an integrated modem to secure the economics of a remote meter reading system, and provides a method for allowing the remote meter reading server to selectively access the electronic meters to individually control the electronic meter. The purpose.

An integrated modem according to an embodiment of the present invention, a data receiving unit for receiving data from a plurality of electronic electricity meter; Remove the common part from each data received from the electronic electricity meters to extract the metering data including only the identification information and the metering information of each electronic meter, and integrate the extracted metering data to be transmitted to the remote metering server. A data processor for generating transmission data; A data storage unit for storing the meter reading data; And a data transmitter for transmitting the transmission data generated by the data processor to the remote meter reading server.

In particular, when the data request is received from the remote meter reading server, the data processor generates the transmission data using the extracted meter reading data, and processes the generated transmission data to be transmitted to the remote meter reading server through the data transmitter. Characterized in that.

The common part may include at least one of a start of frame (SOF) packet, a header, a destination address packet, an error check packet, and an end of frame (EOF) packet.

The data receiving unit may receive data from the plurality of electronic electricity meters by using one or more communication methods of power line communication (PLC), RS485, binary CDMA, Zigbee, UWB, and Bluetooth. .

In addition, the data transmission unit, characterized in that for transmitting the transmission data to the remote meter reading server using one or more communication methods of power line communication (PLC), optical communication, CDMA, GSM, and Wibro.

The data receiving unit may provide high-level data link control (HDLC) protocol communication between the plurality of electronic electricity meters and the integrated modem.

The data receiving unit may provide TCP / IP or UDP / IP protocol communication between the plurality of electronic electricity meters and the integrated modem.

The data receiver may further include spread frequency shift keying (S-FSK) PLC protocol communication between the plurality of electronic electricity meters and the integrated modem.

In addition, the transmission data, the extracted meter reading data are sequentially arranged to form a frame, a SOF (Start of frame) packet, a header (Header), a destination address packet, commonly applied to the one frame, An error check packet and an end-of-frame packet are added and generated.

On the other hand, the remote meter reading method according to an embodiment of the present invention, the step of receiving data from a plurality of electronic electricity meter; Extracting meter reading data including only identification information and metering information of each electronic watt-hour meter by removing a common part common in each data received from the electronic watt-hour meters; Integrating the extracted meter reading data and storing the extracted reading data in a storage means; Confirming whether a data request is received from a remote meter reading server; Generating a transmission data to be transmitted to the remote meter reading server by using the meter data stored in the storage means when a data request is received from the remote meter reading server; And transmitting the generated transmission data to the remote meter reading server.

In particular, the common part may include at least one of a start of frame (SOF) packet, a destination address packet, an error check packet, and an end of frame (EOF) packet.

In addition, the step of receiving data from the plurality of electronic electricity meters, the plurality of electronic electricity meters using at least one communication method of power line communication (PLC), RS485, binary CDMA, Zigbee (UigB), Bluetooth, and Bluetooth Receiving data from the apparatus.

The transmitting of the generated transmission data to the remote meter reading server may include transmitting the transmission data to the remote meter reading server by using one or more communication methods of power line communication (PLC), optical communication, CDMA, GSM, and Wibro. Characterized in that the transmission.

The receiving of data from the plurality of electronic electricity meters may include performing S-FSK PLC protocol communication with the plurality of electronic electricity meters.

In addition, the step of receiving data from the plurality of electronic electricity meters, characterized in that for performing the TCP / IP or UDP / IP protocol communication with the plurality of electronic electricity meters.

The receiving of the data from the plurality of electronic electricity meters may include performing high-level data link control (HDLC) protocol communication with the plurality of electronic electricity meters.

In addition, the transmission data, the extracted reading data is sequentially arranged to form a frame, a SOF (Start of frame) packet, a destination address packet, an error check packet, and commonly applied to the one frame, and An end of frame (EOF) packet is added and generated.

According to the present invention, the following effects can be expected.

By integrating and reprocessing each data transmitted from multiple electricity meters, and transmitting the reprocessed data to a remote meter reading server, it is possible to minimize the communication charge and the load incurred by each modem due to the increase in data volume.

In addition, according to the power line connection method of the integrated modem of the present invention, it is possible to secure the economics of the remote meter reading system, and the remote meter reading server can selectively connect to the electronic electricity meters to perform individual control.

1 is a view for explaining a remote meter reading system according to the present invention.
FIG. 2 is a block diagram illustrating in detail the configuration of the integrated modem shown in FIG. 1.
3 is an exemplary diagram for describing a process of generating data by processing data received from power meters in the data processor 120.
4 is a flowchart illustrating a remote meter reading method in an integrated modem according to an embodiment of the present invention.
FIG. 5 is a block diagram illustrating an example of a network configuration between an integrated modem, a plurality of electronic electricity meters, and a data concentrator.
6 is a diagram illustrating an example of an RJ45 connector signal line and a modem power supply arrangement method.
FIG. 7 is a diagram illustrating a communication flow for individual control of an electronic electricity meter of a remote meter reading server.
8 shows an example of an AC power socket installed in a data transmission unit of an integrated modem.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Here, the repeated description, well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention, and detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more completely describe the present invention to those skilled in the art. Accordingly, the shape and size of elements in the drawings may be exaggerated for clarity.

Hereinafter, an integrated modem and a remote meter reading method for a remote meter reading system according to the present invention will be described in detail.

1 is a view for explaining a remote meter reading system according to the present invention.

Referring to FIG. 1, the remote meter reading system according to the present invention includes a remote meter reading server 30, a data concentrator 50, an integrated modem 100, and a plurality of electronic power meters 200.

The remote meter reading server 30 is connected to the data concentrator (DCU) 50 through a network 40 such as a public communication network, and uses a data transmitted from the data concentrator 50 to remote a power consumer (or a power consumer). Perform an electrical meter reading.

The data concentrator 50 may be located around a columnar or terrestrial transformer and is connected to the integrated modem 100 through wired or wireless communication to receive data transmitted from the integrated modem 100. In this case, as the wireless communication, communication methods such as optical communication, CDMA, GSM, and Wibro may be used.

The data concentrator 50 accumulates the data received from the integrated modem 100, processes the data to conform to the designated communication protocol, and transmits the processed data to the remote meter reading server 30 located at a long distance. At this time, the data transmitted to the remote meter reading server 30 includes information on the energy (eg, electricity) usage of each power consumer and identification information.

The integrated modem 100 receives data from a plurality of electronic electricity meters 200 belonging to the same group, extracts meter data including only identification information and metering information of each electronic electricity meter from the received data, and uses the data. To generate one transmission data transmitted to the data concentrator 50. Electronic meters connected to one integrated modem 100 may form a group between those close to location, and may be grouped according to the type of power consumer (eg, a general house, a factory, etc.).

Meanwhile, the integrated modem 100 generates data to be transmitted when there is a data request from the remote meter reading server 30 in order to prevent the occurrence of communication costs and waste of radio frequency bands due to unnecessary data transmission. Transmitted to the remote meter reading server 30 through (50).

The electronic watt-hour meter 200 (hereinafter, referred to as `` meter '') acquires meter information of a power consumer (or power consumer) at a predetermined time interval or from an external request, and sequentially integrates the meter reading information obtained by a polling method. Transmit to modem 100. For example, the electricity meter 200 acquires meter reading information of a power consumer at fixed times of 00 minutes, 15 minutes, 30 minutes, and 45 minutes every 15 minutes, and sequentially integrates the acquired meter reading information into the integrated modem 100. ).

Meanwhile, in the embodiment of the present invention, the data concentrator 40 is provided between the integrated modem 100 and the remote meter reading server 30, so that the data transmitted from the integrated modem 100 passes through the data concentrator 50. Although described as being transmitted to the remote meter reading server 30, the data concentrator 50 may be omitted depending on the system construction environment. That is, the integrated modem may directly transmit the transmission data generated through the communication interface directly connected to the remote meter reading server 30 to the remote meter reading server 30. In this case, power line communication (PLC), optical communication, CDMA, GSM, and Wibro may be used as the communication interface.

FIG. 2 is a block diagram illustrating in detail the configuration of the integrated modem shown in FIG. 1.

Referring to FIG. 2, the integrated modem 100 according to the present invention includes a data receiver 110, a data processor 120, a data storage 130, and a data transmitter 140.

The data receiver 110 receives data from a plurality of electronic electricity meters. In this case, the data receiving unit 110 uses a communication method such as power line communication (PLC), RS485, binary CDMA (Zigbee), Zigbee, Ultra WideBand (UWB), and Bluetooth (Bluetooth). Receive data transmitted from multiple meters.

The data processor 120 extracts meter reading data including only identification information and metering information of each electronic meter by removing common parts common in each data received from the electronic meter, and integrates the extracted meter reading data to read the meter remotely. Create a single transmission data to send to the server.

Here, the common part removed by the data processing unit 120 may be a start of frame (SOF) packet, a header, a destination address packet, an error check packet, an end-of-frame packet, and the like. That is, the data processing unit 120 removes duplicate or common parts from data received from a plurality of power meters, extracts only meter reading data including only substantial metering information (eg, power usage), and then stores the data by integrating them. Stored in the unit 130.

3 is an exemplary diagram for describing a process of generating data by processing data received from power meters in the data processor 120.

The data 10 received from the electricity meters includes an SOF packet, a header, a destination address packet, an error check packet, an EOF packet, and the like within each data frame, and these packets are commonly included in each data frame. do.

In the past, these same or duplicate packets were included in all data frames transmitted to the remote metering server. As a result, the amount of data to be transmitted to the remote meter reading server becomes unnecessarily large, and the processing load and communication cost in the integrated modem are often excessively generated.

However, in the present invention, by removing the common part included in each data frame, and by configuring the transmission data so that only the metering information (for example, the power consumption) is included, it is possible to reduce the amount of data transmission compared to the conventional.

That is, when the data processor 120 receives data from the electricity meters, the common part of the received data is removed, the meter data including only the identification information and the metering information of each electronic electricity meter is extracted, and the extracted meter data are integrated. 12, the data storage unit 130 stores the data in the data storage unit 130 (S10). When the data request is received from the remote meter reading server, the data processing unit 120 applies a SOF packet, a header, a destination address packet, an error check packet, and an EOF packet which are commonly applied to the meter reading data integrated and stored in the data storage unit 130. In step S20, the transmission data is generated by adding 14 and the like.

The data storage unit 130 stores the meter data extracted from each data received by the data processing unit 120 from the plurality of electronic electricity meters.

The data transmitter 140 transmits the transmission data generated by the data processor 120 to the remote meter reading server. In this case, the data transmission unit 140 transmits the transmission data generated by the data processing unit 120 to the remote meter reading server using a communication method such as power line communication (PLC), optical communication, CDMA, GSM, and Wibro.

4 is a flowchart illustrating a remote meter reading method in an integrated modem according to an embodiment of the present invention.

The remote meter reading method according to the present invention comprises the steps of receiving data from a plurality of electronic electricity meters, removing only a common part of each data received from the electronic electricity meters, including only identification information and metering information of each electronic electricity meter. Extracting the read meter data, integrating the extracted meter data and storing it in a storage means, checking whether a data request is received from a remote meter reading server, and when a data request is received from the remote meter reading server, Generating one transmission data to be transmitted to the remote meter reading server using the meter reading data, and transmitting the generated transmission data to the remote meter reading server.

Referring to Figure 4 in more detail, the integrated modem of the present invention receives data from a plurality of power meters connected to it (S100).

Next, the integrated modem extracts meter data including only identification information and metering information (eg, power usage) of each electronic electricity meter by removing common or overlapping common parts from the respective data received from the electricity meters (S110). Integrating it and storing it in the storage means (S120). Here, the common part may be a start of frame (SOF) packet, a header, a destination address packet, an error check packet, an end of frame (EOF) packet, or the like.

Next, the integrated modem checks whether a data request is received from the remote meter reading server (S130).

As a result of checking in step S130, when a data request is received from the remote meter reading server, the integrated modem generates transmission data to be transmitted to the remote meter reading server using the meter reading data stored in the storage means (S140). At this time, the SOF packet, the header, the destination address packet, the error check packet, and the EOF packet, which are commonly applied to the stored meter reading data, are added to generate the transmission data.

When the transmission data is generated through the step S140, it is transmitted to the remote meter reading server to enable the remote meter reading server to remotely search and confirm the power usage of each power consumer (S150).

5 is a block diagram illustrating an example of a network configuration between an integrated modem, a plurality of electronic electricity meters, and a data concentrator according to the present invention. FIG. 5 illustrates a case in which the integrated modem 160 transmits data to a data concentrator 50 located near a column or ground transformer through a power line for supplying power.

In the conventional remote meter reading system, a built-in power line communication modem is installed in one electronic power meter so that a power line and a power line communication modem, which are transmission media for power line communication, are connected inside the electronic power meter. However, this method requires a lot of power line communication modem installation costs because an integrated power line communication modem should be installed in one electronic electricity meter.

In order to reduce this, connect multiple electronic electricity meters adjacent to the installation location to one integrated modem to collect data of multiple electronic electricity meters and transmit them through the power line, but secure the connection between the integrated modem and the power line, a data transmission medium. Difficult to do

In addition, in the existing remote metering system, the remote metering server does not have direct access to the electronic meter, but can only access the data concentrator, so that the original data of the electronic meter can not be obtained or the electronic meter can be individually controlled.

The network configuration of FIG. 5 is to solve the above problems, and provides an integrated modem power line connection method capable of securing the economics of the remote meter reading system, and the remote meter reading server selectively accesses the electronic electricity meters for individual control. It provides a way to do this.

The 1: N network configuration method between the integrated modem 160 and the plurality of electronic electricity meters 250 according to the present invention has a RS-485 multi-drop method as a basic concept and configures a 1: N network. UTP cable 260 and RJ45 connector 270 is used for physical communication lines and connection terminals. In addition, a 1: N network configuration among the plurality of electronic electricity meters 250 may be implemented according to the pin-out shown in FIG. 6.

In the power line communication (PLC) linking method of the present invention, the AC power socket 280 is installed in the power line signal unit (data transmission unit) of the integrated modem 160, and the integrated modem 160 and the signal commercial power line 295 (250V) AC, 2.5A) to facilitate the coupling (see Figure 8).

In addition, the connection between the signal commercial power line 295 and the power supply line 297 connected to the data concentrator 50 is made through the power supply line lead-in terminal block 298 of the electronic electricity meter 250. Here, the power meter connected to the data concentrator through the power supply line lead-in terminal block 298 will be referred to as a 'main power meter'.

According to the above configuration, the integrated modem 160 reprocesses the data collected from the plurality of power meters through the RJ connector 270 and the UTP cable 260 through the above-described process (see FIGS. 2 and 3). In addition, it is possible to transmit to the power line communication modem (not shown) of the data concentrator 50 through the main electricity meter.

Meanwhile, in the network configuration of FIG. 5, the method for individually controlling the electronic electricity meter of the remote metering server (see FIG. 7) includes a direct connection mode to a communication protocol between the remote metering server 30 and the data concentrator 50. Can be achieved by adding

That is, after the remote metering server 30 instructs the data concentrator 50 in the direct connection mode, and after receiving the response Ack from the data concentrator 50, the remote metering server 30 is a communication protocol. Instead of using the existing communication protocol for data concentrators, it is possible to use the IEC62056 standard communication protocol, a communication protocol dedicated to electronic electricity meters. In addition, the data concentrator 50 does not interpret or respond to data received from the remote metering server 30 or received from the electronic electricity meter 250, and transmits the data to the electronic meter and the remote metering server as it is, thereby providing a remote meter reading server and a remote meter reading server. Direct connection and individual control between electronic meters are implemented.

In an embodiment of the present invention, a 1: N network is constructed using RS485, and a general purpose RJ45 connector and an AC power socket are used for linkage with power line communication to simplify the fabrication of signal input and output units of an integrated modem and an electronic electricity meter. The unit price can be lowered. In addition, it is easy to secure parts for replacement and repair by using general-purpose communication connection parts in terms of operation and maintenance after system installation.

In addition, in the conventional remote meter reading system, the data concentrator communicates with a plurality of electronic electricity meters by itself to acquire, accumulate, and manage data of the electronic electricity meter. In addition, the remote meter reading server was able to acquire necessary data and control the electronic electricity meter only through the data concentrator. However, in the present invention, the remote metering server directly accesses the individual electronic electricity meter through the direct access mode, thereby enabling remote verification of abnormal data and remote inspection of the electronic electricity meter, thereby reducing field management and operation manpower.

On the other hand, in order to improve the economics in the construction of the remote meter reading system, a method of connecting a plurality of electronic electricity meters to one modem has been in the spotlight.

However, for this method, it is very important to easily configure the connection method used when connecting the communication line and configuring the physical network, and the physical network configuration method using the general-purpose connector proposed in the present invention can facilitate the construction of an efficient remote meter reading system. This can also contribute to post-management and system simplification. In addition, it can be applied to the remote meter reading system in various fields such as electricity, gas, and water in the future.

As described above, the best embodiment has been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

30: Remote meter reading server 50: Data concentrator
100: integrated modem 110: data receiving unit
120: data processing unit 130: data storage unit
140: data transmission unit 200: power meter

Claims (17)

A data receiver configured to receive data from the plurality of electronic electricity meters;
In each data received from the electronic electricity meters, a common part including a start of frame (SOF) packet, a header packet, a destination address packet, an error check packet, and an end of frame (EOF) packet are removed and stored. When the data request is received from the remote metering server, the metering data including only the identification information and the metering information of each electronic meter are extracted, and the extracted metering data are sequentially arranged to form one frame, and the one frame A data processor for generating one transmission data to be transmitted to the remote meter reading server by adding a SOF packet, a header packet, a destination address packet, an error check packet, and an EOF packet which are commonly applied to the frame;
A data storage unit for storing the meter reading data; And
And a data transmitter for transmitting the transmission data generated by the data processor to the remote meter reading server. delete delete The method according to claim 1,
The data receiver,
And receive data from the plurality of electronic electricity meters using one or more of a communication scheme such as power line communication (PLC), RS485, binary CDMA, Zigbee, UWB, and Bluetooth. The method according to claim 1,
The data transmission unit,
And transmit the transmission data to the remote meter reading server using at least one of a power line communication (PLC), optical communication, CDMA, GSM, and Wibro. The method according to claim 1,
The data receiver,
And providing high-level data link control (HDLC) protocol communication between the plurality of electronic electricity meters and the integrated modem. The method according to claim 1,
The data receiver,
And provide TCP / IP or UDP / IP protocol communication between the plurality of electronic electricity meters and the integrated modem. The method according to claim 1,
The data receiver,
And provide spread frequency shift keying (S-FSK) PLC protocol communication between the plurality of electronic meters and the integrated modem. delete Receiving data from the plurality of electronic electricity meters;
In each data received from the electronic electricity meters, a common part including a start of frame (SOF) packet, a header packet, a destination address packet, an error check packet, and an end of frame (EOF) packet are removed and stored. Making;
Confirming whether a data request is received from a remote meter reading server;
When the data request is received from the remote meter reading server, extracting metering data including identification information and metering information of each electronic meter;
Sequentially arranging the extracted meter reading data to form a frame;
Generating one transmission data to be transmitted to the remote meter reading server by adding an SOF packet, a header packet, a destination address packet, an error check packet, and an EOF packet commonly applied to the one frame; And
And transmitting the generated transmission data to the remote meter reading server. delete The method according to claim 10,
Receiving data from the plurality of electronic electricity meters,
And receiving data from the plurality of electronic electricity meters using one or more of a communication method of power line communication (PLC), RS485, binary CDMA, Zigbee, UWB, and Bluetooth. The method according to claim 10,
The transmitting of the generated transmission data to the remote meter reading server,
And transmitting the transmission data to the remote metering server using at least one of a power line communication (PLC), optical communication, CDMA, GSM, and Wibro. The method according to claim 10,
Receiving data from the plurality of electronic electricity meters,
And S-FSK PLC protocol communication with the plurality of electronic electricity meters. The method according to claim 10,
Receiving data from the plurality of electronic electricity meters,
And performing TCP / IP or UDP / IP protocol communication with the plurality of electronic electricity meters. The method according to claim 10,
Receiving data from the plurality of electronic electricity meters,
And performing high-level data link control (HDLC) protocol communication with the plurality of electronic electricity meters. delete

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