KR20140120430A - Remote measurement system and Method thereof for AMI using digital TRS - Google Patents

Abstract

The present invention relates to a remote meter reading system, capable of: predicting an overload of a transformer; and preventing a power consumption peak to be measured with a power information measuring device which measures power information of the transformer while remotely reading a meter by communicating with an electronic meter, which can be communicated with a data concentration device and transmits data when the data concentration device requests the corresponding data to the power information measuring device. The remote meter reading system comprises: a meter to meter electricity consumption of a customer; a power information measuring device to measure power information of a transformer for supplying power to the customer and to correct the power information of the transformer using the power information; a data concentration device to receive metering data from the meter through a slave modem and a master modem, to receive the power information from the power information measuring device through a wire/wireless communication, to monitor a status and an operation of the transformer using the power information, and to control the power information measuring device; and a metering server to receive the metering data from the data concentration device through the wire/wireless communication.

Description

Technical Field [0001] The present invention relates to a wireless remote meter reading system using a digital TRS and a control method thereof,

The present invention relates to a wireless remote meter reading system using a digital TRS and a control method thereof, and more particularly, to a wireless remote meter reading system and a control method thereof that can reduce the number of times of resetting a communication modem The present invention relates to a wireless remote meter reading system using a digital TRS for diagnosing a state of a communication modem and improving the transmission / reception ratio of data, and a control method thereof.

In general, the remote meter reading system or the automatic meter reading system (AMR) is used to measure the usage of various meters such as electricity, gas, water, hot water, It is a system that can automatically read the meter reading data in the management office of the management office and retrieve the meter reading data using a computer and output it.

Such an automatic meter reading system converts measurement results from an object at a remote location into an electrical signal, transmits data through a communication network, and can process the data through a computer. Therefore, pollution monitoring, crime prevention, , And gas systems.

In such a conventional remote meter-reading system, the usage amount of the electronic watt-hour meter installed on the customer side is collected by the meter reading data data transferring unit (DCU) using the slave modem for remote meter reading and the master modem and is transmitted to the remote meter reading server .

In this remote meter reading system, data is exchanged mainly by PLC (Power Line Carrier). Such an operation method of the physical layer is highly environmentally restricted.

Therefore, it is required to use a wireless interface which can overcome such a problem. Also, the data of the corresponding protocol using the wireless network is transmitted through the wireless network of the mobile communication company using the CDMA modem or the WCDMA modem.

Meanwhile, TETRA is a digital TRS (Digital Trunked Radio System) standard developed by ETSI, a European telecommunication standard organization, and TETRA was selected as a power IT backbone network.

TETRA was developed to provide voice and data communication services according to the needs of mobile communication of public institutions such as police, firefighting, and public organizations. It is a mobile wireless technology based on digital trunk wireless technology, And conducts the function of the integrated command wireless communication network in case of a disaster disaster.

In addition, TETRA can be used to transmit voice and data (V + D), packet data optimized (PDO) to transmit packet data, and direct mode operation (DMO) Function can be supported.

Therefore, if we switch to the data transmission method using the TETRA network selected as the current electric power IT backbone network, we can see the cost reduction effect. However, in order to change various industrial protocols such as DNP 3.0, DLMS, and IEC 61850, which are currently used in the analog system, to a digital wireless communication system, a TETRA gateway system capable of converting data is needed.

However, in the conventional digital TRS remote meter-reading system, the communication modem is frequently reset unnecessarily frequently during the transmission of meter reading data, and the transmission / reception rate of data is remarkably lowered.

Korean Patent No. 10-0369401 Korean Patent No. 10-0882577

The present invention has been developed in order to improve the above-described conventional techniques, and it is an object of the present invention to reduce the number of times of resetting of a communication modem due to a communication failure when data is transmitted and received by a data concentrator and a remote meter reading server, The present invention also provides a wireless remote meter reading system using the digital TRS and a control method thereof.

According to an aspect of the present invention, there is provided a data concentrator comprising: a data concentrator for receiving meter reading data from a watt hour meter for measuring power consumption on a consumer side and transmitting a modem status check signal to the communication modem for data transmission / reception through a communication modem; And a remote meter reading server for transmitting a meter reading request signal for measuring the power consumption of a consumer to the data concentrating apparatus through the communication modem.

In addition, the present invention provides a wireless remote meter-reading system using a digital TRS including a data concentrator for transmitting a modem status check signal to the communication modem upon receiving a meter-check request signal from an remote meter-reading server.

In addition, the present invention provides a wireless remote meter reading system using a digital TRS including a data concentrator for transmitting a status check packet for checking the state of the communication modem, when there is no data reception request from the remote meter-reading server for a set time.

The present invention also relates to a wireless local area network (LAN) system, comprising a data concentrator that periodically transmits a modem status check signal to a communications modem and transmits a reset signal to the communications modem when there is no response signal from the communications modem for a preset number of times, Provides meter reading system.

In addition, the present invention provides a wireless remote meter reading system using a digital TRS including a data concentrator for restricting transmission of the modem status check signal during transmission of meter reading data to the remote meter reading server through a communication modem.

According to another aspect of the present invention, there is provided an exchange server for transmitting and receiving signals through the wired / wireless communication network with the communication modem to receive a status check packet and transmit a response signal to the data concentrator, The present invention provides a wireless remote meter reading system using a digital TRS.

The present invention also relates to a digital TRS system including an exchange server for searching for a usable communication channel of a communication modem during transmission of meter reading data of the data concentrating apparatus and for limiting the meter reading data transmission of another data concentrating apparatus when no usable communication channel exists, To provide a wireless remote meter reading system.

In addition, the present invention provides a wireless remote meter reading system using a digital TRS including an exchange server for confirming a communication channel of a communication modem and transmitting / receiving signals to / from a communication modem when a usable communication channel of the communication modem is four or more channels.

Further, the present invention provides a wireless remote meter reading system using a digital TRS, further comprising a gateway server connecting the exchange server and the remote meter reading server to check the success rate of meter reading data and the communication success rate of the data concentrator and the remote meter reading server.

According to another aspect of the present invention, there is provided a modem initializing step of a data concentrator resetting a communication modem to transmit meter reading data measured by a meter in response to a meter reading request of an automatic meter reading server; A meter reading data transmission step in which the data concentrator transmits meter reading data to the remote meter reading server when the communication modem is initialized; A communication modem status checking step of sending and receiving a modem status checking signal to check the status of the communication modem due to interruption of meter reading data transmission; And checking the success rate of the meter reading data and the data communication success rate.

Further, in the modem initializing step, after transmitting a modem reset signal from the data concentrator to the communication modem, if there is no response signal from the communication modem over the set time or the preset number of times, And provides a remote meter reading method.

The present invention also provides a wireless remote meter reading method using a digital TRS for transmitting a status check packet for checking the state of the communication modem in the data concentrator when there is no data transmission request from the remote meter reading server for a preset time in a modem initializing step .

The present invention also provides a communication modem status confirmation step of transmitting a modem status check signal from the data concentrator to the exchange server and transmitting a reset signal from the data concentrator to the communication modem when there is no response signal from the exchange server for a preset number of times The present invention provides a wireless remote meter reading method using a digital TRS.

In addition, the present invention provides a wireless remote meter reading method using a digital TRS including a meter reading data transmission step of restricting transmission of a modem status check signal during transmission of meter reading data from the data concentrator to the meter reading server.

According to the wireless remote meter reading system using the digital TRS according to the present invention and the control method thereof, it is possible to prevent a loss of the first AT command transmitted from the data concentrator or a communication modem boot time delay, The connection between the data concentrator and the communication modem can be efficiently performed.

Further, the present invention is advantageous in that the transmission / reception ratio of data can be improved because the state of the communication modem during transmission of the meter reading data from the meter reading data to the remote meter reading server can be stably performed.

1 is a block diagram illustrating a wireless remote meter reading system using a digital TRS according to an embodiment of the present invention.
2 is a flowchart illustrating a wireless remote meter reading method using a digital TRS according to an embodiment of the present invention.
3 is a diagram for explaining the communication flow of the data concentrator and the communication modem for initializing the communication modem according to the embodiment of the present invention.
4 is a diagram for explaining the communication flow between the data concentrator and the remote metering server according to the embodiment of the present invention.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, terms and words used in the present specification and claims are to be interpreted in accordance with the technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to explain his invention in the best way. It must be interpreted in terms of meaning and concept.

Hereinafter, a wireless remote meter reading system using a digital TRS according to the present invention and a control method thereof will be described in detail with reference to the accompanying drawings.

First, a wireless remote meter reading system using a digital TRS according to an embodiment of the present invention will be described with reference to FIG.

Referring to FIG. 1, a wireless remote meter reading system using a digital TRS according to an embodiment of the present invention includes a data concentrator (DCU) 100, A modem 200, an Advanced Metering Infrastructure (AMI) 300, an exchange server 400, and a TRS gateway server 500.

At this time, the wireless remote meter reading system using the digital TRS has a communication method of the communication modem 200, the exchange server 400 and the TRS gateway server 500 for data exchange between the data concentrator 100 and the remote meter reading server 300 Digital TRS (TETRA: Digital TRS European standard).

For example, a digital TRS modem may be used as the communication modem 200 according to the present embodiment, and a digital TRS exchange may be used as the exchange server 400.

The data concentrator 100 receives the meter reading data from the watt hour meter 110 that measures power consumption on the consumer side and transmits a modem status check signal to the communication modem 200 for data transmission and reception through the communication modem 200 . Here, one or more communication methods selected from power line communication (PLC), RS485, binary CDMA, Zigbee, UWB or Bluetooth may be used for data reception by the data concentrator 100 and the watt hour meter 110.

The data concentrator 100 transmits a modem status check signal to the communication modem 200 when the meter reading request signal (meter reading data) is received from the remote meter reading server 300 and whether or not a response signal is received from the communication modem 200 A modem reset signal for resetting the communication modem 200 is transmitted.

If there is no data reception request from the remote meter-reading server 300 for a preset time, for example, two minutes, the data concentrator 100 sends a status check packet to the exchange server 400 for checking the status of the communication modem 200 send. When the exchange server 400 receives the status check packet from the data concentrator 100, the exchange server 400 transmits a response signal.

In addition, the data concentrator 100 transmits a modem status check signal (status check packet) to the switching server 400 and if there is no response signal from the switching server 400 for the set number of times, for example, two times, The reset signal is transmitted to the communication modem 200 so as to be reset.

In addition, the data concentrator 100 has a power supply for driving the communication modem 200. The power supply unit supplies the driving power of 12V 3A or 7.5V 3A to the communication modem 200. The driving power supplied from the data concentrator 100 to the communication modem 200 can be variously changed according to the specification of the communication modem 200. [

Although the data concentrator 100 receives the meter reading data from the watt hour meter 110 in this embodiment, the data concentrator 100 may store the meter reading data of the water meter, the gas meter, the heating meter, .

The communication modem 200 has 12 communication channels so that the data concentrator 100 and the exchange server 400 can transmit and receive signals. The communication modem 200 transmits and receives data through one communication channel for transmission and reception of control signals and communication channels other than the three communication channels for transmitting and receiving voice signals among 12 communication channels.

Upon receiving a status check packet from the data concentrator 100, the exchange server 400 transmits / receives a signal to / from the communication modem 200 through the wired / wireless communication network to transmit a response signal to the data concentrator 100, And transmits and receives signals through the wired communication network with the remote meter reading server 300.

At this time, a digital TRS (TETRA: Digital TRS European Standard) method can be used as a communication network connecting the switching server 400 and the communication modem 200, and a wired line connecting the switching server 400 and the remote meter reading server 300 An internal communication network such as an intranet, an Ethernet, etc. may be used as a communication network.

Particularly, the exchange server 400 does not use the meter reading data from the data concentrator 100 to the remote meter reading server 300 so that data exchange between the data concentrator 100 and the remote meter reading server 300 can be effectively performed The channel is searched to limit the data transfer to the other data concentrator 100 if there is no empty channel.

In addition, the switching server 400 checks the communicable communication channel of the communication modem 200 and transmits and receives the meter reading data, the status check packet, and the like from the data concentrator 100 when there are five or more usable communication channels.

The gateway server 500 connects the exchange server 400 and the remote meter-reading server 300 to check the success rate of the meter reading data transmission and the communication success rate of the data concentrator 100 and the remote meter-reading server 300, And acquires communication information from the server 400 and the remote meter reading server 300.

Also, the meter reading data transmission success rate and the communication success rate may be checked by the remote meter reading server 300, and the remote meter reading server 300 controls the communication between the exchange server 400 and the gateway server 500.

A control method of the wireless remote meter-reading system using the digital TRS according to the present invention will be described with reference to FIGS. 1 to 4. FIG.

As shown in FIGS. 1 to 4, in the remote meter reading method according to the present embodiment, the data concentrator 100 transmits data to the communication modem 200 in order to transmit the meter reading data in response to the power meter reading request of the remote meter reading server 300, (S20) for transmitting the meter reading data to the remote meter reading server (300) from the data concentrator (100) when the communication modem (200) is initialized, and a meter reading step A communication modem status checking step (S40) of sending and receiving a modem status checking signal to the data concentrator 100 and the switching server 400 to check the status of the communication modem 200, And checking the transmission success rate and the data communication success rate (S40).

In the modem initialization step S10, it is determined whether there is a power meter reading request from the remote meter reading server 300 (S11). If there is a meter reading request, the data concentrator 100 transmits a reset signal to the data modem 100 for data transmission And initializes the communication modem 200 (S13).

The communication flow of the data concentrator 100 and the communication modem 200 in the modem initialization step (S10) will be described in detail with reference to FIG.

First, when the data concentrator 100 receives the power consumption meter inquiry request signal, it transmits a modem recall signal from the data concentrator 100 to the communication modem 200, 20 seconds later, a signal for confirming the operation of the communication modem 200 is transmitted.

If there is no response signal from the communication modem 200 for a predetermined time, for example, 10 seconds, the data concentrator 100 transmits the operation signal of the communication modem again. If there is no response signal from the communication modem 200, the data concentrator 100 transmits a reset signal for resetting the communication modem 200 to the communication modem 200.

In the meter reading data transmission step S20, it is determined whether the communication modem 200 has been initialized according to the response signal of the communication modem 200 (S21). If the communication modem 200 is initialized, And transmits the meter reading data to the meter reading server 300 (S23). At this time, if the communication modem 200 has not been initialized, step S11 is performed.

Meanwhile, in the modem initializing step S10 and the meter reading data transmitting step S20, the data concentrator 100 transmits the modem recall signal to the communication modem 200 and transmits the modem recall signal to the communication modem 200 within a predetermined time, for example, The data concentrator 100 starts the transmission of the meter reading data to the remote meter reading server 300.

Thereafter, in the communication modem state checking step S30, it is determined whether the meter reading data transmission from the data concentrator 100 to the remote meter reading server 300 has been interrupted (S31). If there is no transmission of the meter reading data, .

In the meter reading data transmission step (S20), the transmission of the modem status check signal is restricted during transmission of the meter reading data from the data concentrator (100) to the remote meter reading server (300). This is to prevent the unnecessary resetting of the communication modem 200.

In step S30, it is determined whether the data transfer is interrupted in step S31. If the data transfer is interrupted, the data concentrator 100 transmits a modem status confirmation signal to the exchange server 400 In step S33, the switching server 300 determines whether there is a response signal for two times, for example, two times. If there is no response signal, step S11 is performed. If there is a response signal, step S22 is performed.

In the modem initialization step (S10), if there is no request to transmit the meter reading data for a set time, for example, 2 minutes or longer from the remote meter reading server 300, the data concentrator 100 transmits a status check packet for checking the state of the communication modem, The presence or absence of abnormality is checked.

It will be apparent to those skilled in the art that the present invention is not limited to the embodiment described above, but may be embodied in various other forms without departing from the spirit of the invention, It will be understood by those of ordinary skill in the art that various changes and modifications may be made without departing from the scope of the present invention.

100: data concentrator 110: watt hour meter
200: communication modem 300: remote meter reading server
400: exchange server 500: gateway server

Claims (14)

A data concentrator for receiving meter reading data from a meter for measuring a usage amount of at least one of power, gas, water, heating, and hot water on a consumer side and transmitting a modem status check signal to the communication modem for data transmission / ; And
A remote meter reading server for transmitting a meter reading request signal for measuring the usage of the meter to the data concentrator through the communication modem;
And a wireless remote meter reading system using the digital TRS. The method according to claim 1,
Wherein the data concentrator transmits a modem status confirmation signal to the communication modem upon receiving a meter-check request signal from the remote meter-measurement server. 3. The method of claim 2,
Wherein the data concentrator transmits a status check packet for checking the status of the communication modem if the data collecting server does not receive a data reception request from the remote metering server for a preset time.
3. The method of claim 2,
Wherein the data concentrator transmits a modem status confirmation signal to the communication modem and transmits a reset signal to the communication modem when there is no response signal from the communication modem for a set number of times. The method according to claim 1,
Wherein the data concentrator restricts transmission of the modem status check signal during transmission of the meter reading data to the remote meter reading server through the communication modem. The method of claim 3,
Receiving a status check packet, transmitting and receiving a signal through the wireless communication network with the communication modem to transmit a response signal to the data concentrator, and an exchange server transmitting and receiving signals through the wired communication network with the remote meter reading server And the wireless remote meter reading system using the digital TRS. The method according to claim 6,
Wherein the exchange server searches for an unused channel among the communication channels of the communication modem during transmission of the meter reading data of the data concentrator and restricts the meter reading data transmission of the other data concentrator when the empty communication channel does not exist Wireless remote meter reading system using digital TRS. The method of claim 3,
Wherein the exchange server confirms a communication channel of the communication modem and transmits / receives a signal to / from the communication modem when the usable communication channel of the communication modem is five or more channels. 9. The method according to any one of claims 6 to 8,
Further comprising a gateway server for connecting the exchange server to the remote meter-reading server to check the success rate of meter reading data and the communication success rate of the data concentration device and the remote meter-reading server. A modem initializing step of causing the data concentrator to reset the communication modem to transmit the meter reading data measured by the meter in response to the meter reading request of the remote meter reading server to the remote meter reading server;
A meter reading data transmission step in which the data concentrator transmits meter reading data to the remote meter reading server when the communication modem is initialized;
A communication modem status checking step of sending and receiving a modem status checking signal to check the status of the communication modem due to interruption of meter reading data transmission; And
Confirming the meter reading data transmission success rate and the data communication success rate;
Wherein the wireless remote meter reading method using the digital TRS is used. 11. The method of claim 10,
Wherein the modem initializing step initializes the communication modem when a response signal is not received from the communication modem after the modem reset signal is transmitted from the data concentrator to the communication modem. Remote meter reading method. 11. The method of claim 10,
Wherein the modem initializing step transmits a status check packet for checking the status of the communication modem in the data concentrator if the data metering server does not request a data transmission for the preset time from the remote metering server . 11. The method of claim 10,
The data concentrator transmits a modem status confirmation signal from the data concentrator to the exchange server and transmits a reset signal from the data concentrator to the communication modem when there is no response signal from the exchange server for a preset number of times. Wireless remote meter reading method using digital TRS. 11. The method of claim 10,
Wherein the meter reading data transmission step restricts the transmission of the modem status check signal while transmitting the meter reading data from the data concentrator to the meter reading server.

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