KR100718300B1 - Control system of remote device - Google Patents

Abstract

The present invention relates to a field equipment control system that can control each of the field equipment located in different areas, such as water and sewage control system, and centrally manage them.

The present invention provides a plurality of local control devices for respectively controlling a plurality of field equipment; And a central monitoring device connected to the local control devices through a communication network to exchange control information for the field devices, wherein the field devices, the local control devices, and the central monitoring device each support a first communication method. And a module and a second communication method support module, and if the first communication method is disabled, the present invention provides a field equipment control system, characterized in that for switching to the second communication method to transmit and receive data.

Central monitoring unit, local control unit, CDMA wireless modem, SMS, 95 / B

Description

Field Equipment Control System {CONTROL SYSTEM OF REMOTE DEVICE}

1 is a view showing the configuration of a conventional field equipment control system.

2 is a view showing the configuration of a field equipment control system according to a first embodiment of the present invention.

3 is a view for explaining the communication between the normal and emergency of each device of FIG.

4 is a view showing the configuration of a field equipment control system according to a second embodiment of the present invention.

FIG. 5 is a diagram for describing a communication system in a normal and emergency state of each device of FIG. 4.

In the drawings according to the present invention, the same reference numerals are used for components having substantially the same configuration and function.

* Explanation of symbols for main parts of drawings *

10, 110, 120: central monitoring device

31,32,33,310,320: Local control device

41,42,43,410,420: Field equipment

The present invention relates to a control system, and more particularly, to a field equipment control system that can control each of the field equipment located in different areas, such as water and sewage control system and centrally manage them.

1 is a view showing the configuration of a conventional field equipment control system.

Referring to FIG. 1, the conventional field equipment control system includes local control devices 31, 32, and 33 and local control devices 31, 32, respectively, for controlling the field devices 41, 42, and 43, respectively. 33) is connected to the communication network is composed of a central monitoring device 10 for transmitting and receiving data with the control devices (31, 32, 33).

The communication network is any one of a telephone network, a wired Internet network or a CDMA wireless communication network.

In addition, if the communication between the devices using a wired Internet network as described above, if the wired Internet network becomes incapable of communication, data exchange between the devices is impossible and control of the field equipment is not possible until the Internet network is restored. There is a problem.

The present invention has been made to solve the above problems, and an object of the present invention is to enable the use of both a wired Internet network and a CDMA wireless communication network to exchange data using another communication network even when one communication network becomes incapable of communication. It is to provide an on-site equipment control system that can continuously control the on-site equipment.

The configuration of the present invention for achieving the above object comprises a plurality of local control devices for respectively controlling a plurality of field equipment; And a central monitoring device connected to the local control devices through a communication network to exchange control information for the field devices, wherein the field devices, the local control devices, and the central monitoring device each support a first communication method. A module and a second communication method support module, and if the first communication method is not available, switch to the second communication method and transmit and receive data.

In a preferred embodiment, the first communication method is a communication method using a wired Internet network, and the second communication method uses a CDMA wireless modem.

In a preferred embodiment, the communication method using the CDMA wireless modem is any one of a TCP / IP wireless Internet communication method, an SMS communication method, and a 95 / B communication method.

In a preferred embodiment, the field equipment is the end pressure measuring device of the end of the water supply pipe, the local control device is a pressurized pump control device of the pressure station connected to the water supply end, the central monitoring unit of the waterworks business headquarters connected to the pressure station. Waterworks central monitoring device.

In a preferred embodiment, the first communication method is a communication method using a wired Internet network or a TCP / IP wireless Internet communication method using a CDMA wireless modem, and the second communication method is an SMS communication method using a CDMA wireless modem or 95 / B communication method.

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

In the embodiments of the present invention to the field equipment, such as the central monitoring device for monitoring the regional waterworks of the central waterworks business headquarters, the regional control device for controlling the pressurized pump of each regional pressure station and the end pressure measuring equipment for measuring the state of the end. An example of an on-site equipment control system will be described.

[Example 1-Wired / Wireless Redundancy]

2 is a view showing the configuration of a field equipment control system according to a first embodiment of the present invention.

2, the field equipment control system according to the first embodiment of the present invention is composed of field equipment 410, local control devices 310 and the central monitoring device 110, the field equipment ( 410, the local control devices 310 and the central monitoring device 110 are connected to each other via a wired Internet network, each having a CDMA modem (500).

Each of the field equipment is a device that is located at the end of the upper conduit is a device for measuring the end pressure of the end of the water pipe. The field equipment measures the end pressure of the water supply pipe and transmits it to the local control device.

Each regional control device is a control device for controlling a pump in a pressurized field connected to a water pipe in which the field equipment is located, and controls the pump according to a pipe pressure value transmitted from the field equipment.

The central monitoring device 110 is a water supply monitoring device located in the waterworks business headquarters, receives control information from the local control devices, and sends control information to the local control device when necessary.

FIG. 3 is a diagram for describing communication methods of normal and emergency of each device of FIG. 2.

Referring to FIG. 3, the field devices 410, the local control devices 310, and the central monitoring device 110 exchange data with each other through a wired internet network during normal times, that is, when the wired internet network is in a normal state.

However, when the wired Internet network is not available, each device must transmit and receive data using a different communication method. If such an inability to communicate continues and this makes it impossible to exchange control data between the field equipment and the local control devices or between the local control devices and the central monitoring device, for example, the pump control device despite the low water supply pressure. If the pumping stops because the end pressure is unknown, the water supply will not be normal.

Therefore, when the usual communication method used between devices is impossible, it is necessary to promptly send and receive control data using another alternative communication method.

Accordingly, in the field equipment control system according to the first embodiment of the present invention, when the wired Internet network is in an abnormal state, the field equipment 410, the local control devices 310, and the central monitoring device 110 are CDMA wireless modems. Using 500, data is transmitted and received through the CDMA wireless communication network.

Representative methods of sending and receiving data wirelessly using CDMA modems include TCP / IP wireless Internet communication using CDMA modems, SMS (Short Message Service) using CDMA modems, and 95 / B communication using CDMA modems. There is this.

Accordingly, the field equipment control system according to the first embodiment of the present invention transmits and receives data using a TCP / IP wireless Internet network, or uses an SMS communication method or a 95 / B communication method when the wired Internet network is incapable of communication. Send and receive data.

Second Embodiment-Wireless / Wireless Redundancy

4 is a view showing the configuration of a field equipment control system according to a second embodiment of the present invention, Figure 5 is a view for explaining the communication method of the normal and emergency of each device of FIG.

4, the field equipment control system according to the second embodiment of the present invention is composed of the field equipment 420, the local control devices 320 and the central monitoring device 120, the field equipment ( 420 and the local control devices 320 transmit and receive data using a wireless Internet network, the local control devices 320 and the central monitoring device 120 is connected to each other through a wired Internet network to each other Give and take.

The field equipment 420, the local control devices 320, and the central monitoring device 120 are each provided with a CDMA wireless modem 500.

The field equipment is often located in a mountainous area far away from the area where the control device is located locally or in a place where a communication infrastructure is not established. Therefore, unlike the central monitoring device 120 or the local control devices 320, the field equipment 420 is often located in an area where a wired internet network such as a telephone network or an Internet dedicated line is not established. In the second embodiment, the case where the field devices are not connected to the wired Internet network and the data is exchanged with the local control device using the TCP / IP wireless Internet communication method using the CDMA wireless modem will be described as an example.

Referring to the drawings, normally, the field devices 420 and the control devices 320 exchange data using a TCP / IP wireless Internet communication method, and the control devices 320 and the central monitoring device. 120 exchanges data using a wired Internet network.

However, when the wired Internet network is not available or the TCP / IP wireless Internet network cannot be used, each of the devices must transmit and receive data using a different communication method.

The field equipment control system according to the second embodiment of the present invention uses a CDMA wireless modem provided by these devices when the TCP / IP wireless Internet network between the field equipment and the local control devices becomes incapable of communication. It is possible to send and receive data between these devices using SMS communication or 95 / B communication.

In addition, when the wired Internet network between the local control devices and the central monitoring device becomes incapable of communication, data using TCP / IP wireless Internet communication, SMS communication, or 95 / B communication using a CDMA wireless modem. Allows you to send and receive

In the above, the configuration and operation of the field equipment control system according to an embodiment of the present invention has been shown in accordance with the above description and drawings, but this is merely described for example and within the scope without departing from the spirit and scope of the present invention. Of course, various changes and modifications are possible.

In particular, the present invention can be applied to efficiently manage various equipment and control devices located in various regions, such as the power management system of the Korea Electric Corporation or the gas management system of the Korea Gas Corporation. It is obvious that it is within the scope of the technical idea.

As described above, the present invention enables the use of both a wired Internet network and a CDMA wireless communication network, so that even if one communication network becomes incapable of communication, data can be exchanged using another communication network to continuously control field equipment. There is an advantage.

Claims (6)

delete delete delete delete A plurality of field devices installed in the field; A plurality of local control devices connected to the plurality of field devices to control the field devices, respectively; In the field equipment control system comprising; a central monitoring device connected to the plurality of local control devices through a communication network for transmitting and receiving control information for the field equipment, The plurality of field equipment is the end pressure measuring device of the end of the water supply pipe, the plurality of local control devices are pressurized pump control device of the pressure station connected to the end of the water supply pipe, the central monitor is the water supply center of the waterworks business headquarters connected to the pressure station. Is a monitoring device, The terminal pressure measuring devices, the pressurized pump control devices and the water supply central monitoring device are provided with a first communication method support module and a second communication method support module, respectively, and if the first communication method is disabled, the second communication method is switched to the second communication method. Send and receive data, The first communication method is a TCP / IP wireless Internet communication method using a CDMA wireless modem between the plurality of terminal pressure measuring devices and the plurality of pressure pump control devices, and the plurality of pressure pump control devices and a central water supply monitoring system. The device is a communication method using a wired Internet network, The second communication method is the field equipment control system, characterized in that all the SMS communication method or 95 / B communication method using a CDMA wireless modem. delete

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