KR101219205B1 - Apparatus and method for gathering underground facilities data - Google Patents

Abstract

PURPOSE: An underground facility data collecting apparatus and a method thereof are provided to collect data from underground facilities such as a flowmeter of water supply or sewerage without an additional facility construction. CONSTITUTION: An underground facility data collecting apparatus comprises a data collecting unit(210), a wired communication unit(220), a wireless communication unit(230), a power managing unit(240), and a controlling unit(260). The data collecting unit collects the data measured by flowmeters of underground facilities. The wired communication unit transfers the measured data to a repeater on the ground through wire communication means, while the wireless communication unit transfers the data through wireless communication means. The power managing unit selects either power supplied with wire communication data from the wired communication unit or power supplied from a battery to supply main power. If the selected main power is cut off, the power managing unit switches to the other power. The controlling unit sets the wired communication unit or the wireless communication unit as a default communication unit to transfer the measured data, and if a communication error occurs in the default communication unit, controls switching to the other backup communication unit for transferring the data. [Reference numerals] (200) Data collecting apparatus; (210) Data collecting unit; (220) Wired communication unit; (221) Power line communication module; (231) Zigbee communication module; (232) ISA 100 communication module; (233) Wireless hart communication module; (240) Power management unit; (250) Battery; (260) Control unit; (AA) Power output; (BB) Main power; (CC) Serial communication module; (DD) Wireless communication unit; (EE) Power and communication signal; (FF) Power input communication signal

Description

Underground facility data collection device and method thereof {APPARATUS AND METHOD FOR GATHERING UNDERGROUND FACILITIES DATA}

The present invention relates to an underground facility data collection device and method thereof.

In general, underground facilities mean various facilities buried underground for the purpose of improving the living environment such as water supply, sewage, gas, telecommunications, electricity, oil pipelines and heating heat pipes.

Underground facilities are highly likely to cause accidents due to the fact that many facilities must be buried in a limited underground space, and in case of an accident, many people's living conditions are inconvenient, so monitoring and inspection for maintenance are essential.

On the other hand, underground facilities are installed underground to collect the data to be detected by installing equipment on the ground to monitor the nature of the easy access for maintenance.

For example, in the case of the conventional water meter installed in the water supply and sewage system, an electronic ultrasonic flow meter, an electromagnetic flow meter, and the like are mainstream, and the acquired data is transferred to an external control device through a wired line.

Recently, various technologies for intelligentizing facilities by applying USN (Ubiquitous Sensor Network) technology to underground facilities have been developed, and electronic battery flowmeter technologies using wireless communication technology have been developed.

The electronic flow meter based on wireless communication provides a good environment for providing services such as measurement and inspection using a mobile terminal through wireless communication without incurring additional costs for power and wired communication wiring. In addition, it is also possible to solve the problem of the position constraint of the control device by transmitting the flow rate data sensed through wireless communication.

Despite these many advantages, there is a possibility that the reliability of the wireless communication is deteriorated due to the influence of the surrounding environment, and the wireless transmission itself is often impossible when the flowmeter or the manhole is flooded.

In other words, the water supply and sewage flowmeter is a city infrastructure, while the reliability of the data is very important, the wireless communication technology alone has a problem that it is difficult to guarantee the complete reliability.

In addition, many existing electronic flowmeters are equipped with a wired facility for collecting data remotely, and in the case of a future flowmeter, it is required to use a combination of wireless and wired.

Accordingly, an object of the present invention is to provide an underground facility data collection device and method for stably collecting data of underground facilities such as a water supply flowmeter and a sewer flowmeter.

In order to solve the above technical problem, a data collection device for underground facility management, the data collection unit for collecting the measurement data measured by the instrument installed in the underground facility; A wired communication unit for transmitting the measurement data to a terrestrial repeater through a wired communication means; A wireless communication unit for transmitting the measurement data to a terrestrial repeater through wireless communication means; A power management unit which selects any one of the power supplied with the wired communication or the power supplied from the battery through the wired communication unit to supply the main power, and switches to another power when the selected main power is cut off; And determining one of the wired communication unit and the wireless communication unit as a basic communication unit and controlling the transmission of the measurement data using the same. If the communication error occurs in the basic communication unit, the control unit switches to another backup communication unit to transmit the measurement data. It includes a control unit.

The wired communication unit may include at least one of a power line communication module and a serial communication module (RS-485 or RS-232) for simultaneously transferring data and power through a two-wire communication line, and the wireless communication unit includes a Zigbee communication module and an ISA. It may include at least one of the 100 communication module and the Wireless HART communication module.

The controller may be configured to transmit the measurement data by switching to the backup communication unit when the number of occurrences of communication error occurrences of the basic communication unit is accumulated over a preset reference number or when communication is not continuously performed.

In addition, the measuring instrument is a flow meter for measuring the flow rate of water and sewage, the power management unit may supply power to the flow meter.

On the other hand, according to an embodiment of the present invention, a method for transmitting data by the data collection device for underground facility management, a) collecting the measurement data measured in the instrument installed in the underground facility; b) determining one of a wired communication unit and a wireless communication unit as a basic communication unit and using the same, transmitting the measurement data to a terrestrial repeater; c) if a communication error occurs during transmission of the measurement data using the basic communication unit, determining whether a cumulative number of communication errors that fail to transmit the measurement data is equal to or greater than a reference number of settings; And d) switching to another backup communication unit to transmit the measurement data when the accumulated number of communication errors is equal to or greater than the set reference number.

In addition, step d) may add communication error information including at least one of information encoding the cause of the communication error, the number of failures, time and identification information of the communication module, and installation location information to the measurement data.

By the above-described configuration, it is possible to improve reliability in data collection of the measuring instrument using the wireless communication technology, and to increase the utilization thereof by maintaining compatibility with the facility using the conventional wired communication technology.

 In addition, it is possible to effectively apply a redundant power supply using a battery to the existing flowmeter room equipment has the effect that can be applied without additional equipment construction.

In addition, when an error occurs in the wireless or wired communication means due to the environmental effects of the surroundings, by switching to another backup communication means to transmit the measurement data stably, it is possible to secure the reliability of the measurement data collection.

In addition, by applying to the existing measuring instrument without a remote metering function, there is an effect that can configure a USN-based network capable of intelligent IoT.

Figure 1 schematically shows the configuration of the underground facility data collection system according to an embodiment of the present invention.
2 shows a configuration of a data collection device having a network redundancy function according to an embodiment of the present invention.
3 is a flowchart illustrating a method for collecting underground facility data according to an exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

Now, the underground facility data collection device and method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 schematically shows the configuration of the underground facility data collection system according to an embodiment of the present invention.

Referring to FIG. 1, the underground facility data collection system according to an exemplary embodiment of the present invention collects data for measuring the state of the underground facility 100, collecting measurement data, and transmitting the measurement data to the outside through a wired or wireless communication. And a repeater 300 for transmitting the measurement data transmitted from the device 200 and the data collection device 200 to a central management system (not shown) for managing underground facilities.

Meter 100 is a device for measuring the state of the underground facilities, for example, a water meter for measuring the amount of fluid flowing in the pipe, such as water, sewage, gas, oil pipe and heating heat pipe. The flowmeter may include an electronic ultrasonic flowmeter, an electromagnetic flowmeter, a turbine flowmeter, a differential pressure flowmeter, and the like.

Hereinafter, in describing an embodiment of the present invention, the meter 100 is described on the assumption of a flow meter, but is not limited thereto, and may include various sensors for measuring a state thereof according to the type of underground facilities.

Data collection device 200 according to an embodiment of the present invention is a network redundancy communication device having a heterogeneous communication module to collect the measurement data measured by the measuring instrument 100, and selectively use any one of wired communication and wireless communication. To the repeater 300.

The repeater 300 serves to receive the measurement data of the underground facility received from the at least one data collection device 200 periodically or aperiodically and transmit it to the central management system.

At this time, the repeater 300 also has a network redundancy communication structure capable of wired and wireless communication like the data collection device 200, it may be connected to a plurality of data collection device 200.

Meanwhile, the configuration of the data collection device 200 having the network redundancy function according to the embodiment of the present invention will be described in detail with reference to FIG. 2.

2 shows a configuration of a data collection device having a network redundancy function according to an embodiment of the present invention.

Referring to FIG. 2, the underground facility data collection device 200 according to an embodiment of the present invention may include a data collection unit 210, a wired communication unit 220, a wireless communication unit 230, a power management unit 240, and a battery. 250 and the control unit 260.

The data collector 210 collects measurement data measured by the measuring instrument 100.

The data collector 210 supports a standard protocol such as MODBUS for compatibility with various instruments 100.

Modbus is one of the world's most prevalent automation protocols. It is not only serial communication equipment (e.g. RS-232 / 422/485) but also power line communication (PLC) and distributed control systems. The data collection unit 210 is compatible with various types of measuring instruments 100 because it has compatibility used as a communication standard for many industrial devices such as a control system (DCS), a human machine interface (HMI), a measuring instrument, and a meter. It has the compatibility to collect measurement data by interlocking.

The wired communication unit 220 transmits the measurement data collected by the data collection unit 210 to the repeater 300 through wired communication, and includes at least one of the power line communication module 221 and the serial communication module 222.

The wired communication unit 220 may supply data communication and power together, and the power line communication module 221 may efficiently transmit measurement data and power through a two-wire line.

In addition, the serial communication module 222 may be configured of any one of RS-485 and RS-232, and in this case, a power line and a communication line may be separately configured.

The wireless communication unit 230 transmits the measurement data collected by the data collection unit 210 to the repeater 300 through wireless communication, and Zigbee as a common communication network interface that enables interoperability between different wireless field communication networks. ) At least one of a communication module 231, an ISA 100 communication module 232, and a Wireless HART communication module 233.

The Zigbee communication module 231 is a wireless communication module capable of low power wireless networking supporting near field communication.

The ISA 100 communication module 232 is a wireless connectivity standard protocol for industrial monitoring, logging, alarming, and more. It is a low complexity, low cost, low power wireless communication module.

The Wireless HART communication module 233 is an open interoperable wireless communication standard that is compatible with the existing HART protocol and supports a control and automation system.

The Zigbee communication module 231, ISA 100 communication module 232, Wireless HART communication module 233 has a common in common low cost, low power and interworking with the existing network, environmental information through the sensor in the USN-based environment Is the underlying technology for collecting and managing data.

The power management unit 240 supplies power supplied with wired communication through the wired communication unit 220 as main power, and when the main power through the wired communication unit 220 is cut off, power of the battery 250 as an emergency power source. Supply. In addition, the power manager 240 may supply power to the measuring instrument 100 when necessary.

In addition, the power manager 240 may supply the power of the battery 250 as the main power, and in this case, the power 250 may be converted to charge the battery 250 by converting the power supplied through the wired communication unit 220.

The battery 250 accumulates power supplied through the wired communication unit 220 and supplies emergency power or main power according to management control of the power management unit 240.

The control unit 260 stores various programs and data for the operation of the underground facility data collection device 200, and controls the overall operation of each unit for the operation based on this.

For example, the controller 260 may be configured as a micro controller unit (MCU), and the measurement data collected by using any one of the wired communication unit 220 or the wireless communication unit 230 provided as a relay 300 may be used as the relay 300. send.

When the measurement data is transmitted using the wired communication unit 220 or the wireless communication unit 230 set as a default, the control unit 260 may accumulate more than a predetermined reference number of times, or another backup may not be performed continuously. Switch to the network.

At this time, the controller 260 may determine switching to wired or wireless communication and process the determined communication protocol to transmit measurement data.

In addition, the log information according to the communication error occurrence is coded and recorded, and the error occurrence history is transmitted to the central management system through the repeater 300 to be referred to the maintenance.

On the other hand, the underground facility data collection device 200 according to an embodiment of the present invention will be described a process of collecting the measurement data according to the network duplication communication to the repeater 300, using the wireless communication as the default (Default) It is assumed and explained.

3 is a flowchart illustrating a method for collecting underground facility data according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the data collection device 200 according to an embodiment of the present invention collects measurement data measured from the meter 100, such as a flow meter installed in a water supply or sewerage system (S110).

The data collection device 200 generates a measurement data transmission message according to a transmission protocol of the default wireless communication unit 230 (S120), and transmits measurement data through the wireless communication unit 230 (S130). In this case, the data collection device 200 may attempt to transmit the measurement data using any one of the Zigbee communication module 231, the ISA 100 communication module 232, and the Wireless HART communication module 233.

The data collection device 200 terminates the transmission of the measurement data if the measurement data is successfully transmitted (S140; YES), but fails to transmit the measurement data (S140; NO) once in the log information. In addition, it records (S150).

Then, the data collection device 200 compares the cumulative number of communication errors that failed to transmit the measurement data with a setting reference error number (for example, three times), and if it is less than the reference error number, returns to step S130 and attempts to retransmit. (S160; no).

On the other hand, if the cumulative number of communication errors that fail to transmit the measurement data in step 160 is greater than or equal to the reference number (S160; YES), communication error information is added to the measurement data transmission message (S170). The communication error information may include at least one of information encoding the cause of the communication error, a number of failures, a time, and identification information (installation location and type) of the communication module.

Then, the data collection device 200 transfers the measurement data transfer means from the wireless communication unit 230 to the wired communication unit 220 to transmit the measurement data to which the communication error information is added (S180). In this case, the wired communication unit 220 may use at least one of the power line communication module 221 and the serial communication module (RS-485 / RS-232) 222.

As described above, according to the exemplary embodiment of the present invention, reliability of measurement data collection may be improved in data collection of the measurement device 100 using wireless communication technology, and the compatibility is maintained by maintaining compatibility with facilities using conventional wired communication technology. There is an effect that can increase the usability.

 In addition, there is an advantage that can be applied without additional equipment construction by effectively enabling the redundant power supply using a battery to the existing flow meter room equipment.

In addition, when an error occurs in the wireless or wired communication means due to the environmental effects of the surroundings, there is an effect of ensuring the reliability of data collection by switching to another communication means and transmitting data stably.

In addition, by applying to the existing measuring instrument without a remote metering function, there is an effect that can configure a USN-based network capable of intelligent IoT.

Although the embodiments of the present invention have been described above, the present invention is not limited only to the above embodiments, and various other changes are possible.

For example, in the exemplary embodiment of the present invention illustrated in FIG. 3, the data collection device 200 transmits measurement data by using the wireless communication unit 230 by default, and switches to the wired communication unit 220 when the error occurs repeatedly, and thus the measurement data. It has been described on the assumption that it transmits, but is not limited thereto.

That is, the data collection device 200 uses the wired communication unit 220 as a default, and may transmit measurement data by using the wireless communication unit 230 when an error occurs.

Thus, the data collection device 200 according to an embodiment of the present invention by supporting the wireless communication and wired communication at the same time when the problem occurs in the wireless or wired communication switch to another network to improve the reliability of monitoring the underground facilities There is.

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

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, It belongs to the scope of right.

100: instrument 200: data acquisition device
210: data collection unit 220: wired communication unit
211: power line communication module 212: serial communication module
230: wireless communication unit 231: Zigbee communication module
232: ISA 100 communication module 233: HART communication module
240: power management unit 250: battery
260 control unit 300 repeater

Claims (6)

In the data collection device for underground facility management,
A data collecting unit collecting measurement data measured by a measuring instrument installed in an underground facility;
A wired communication unit for transmitting the measurement data to a terrestrial repeater through a wired communication means;
A wireless communication unit for transmitting the measurement data to a terrestrial repeater through wireless communication means;
A power management unit which selects any one of the power supplied with the wired communication or the power supplied from the battery through the wired communication unit to supply the main power, and switches to another power when the selected main power is cut off; And
Determines one of the wired communication unit and the wireless communication unit as a basic communication unit and controls to transmit the measurement data by using the same, and when the communication error occurs in the basic communication unit, switches to another backup communication unit to control the transmission of the measurement data. Control
Underground facilities data collection device comprising a. The method of claim 1,
The wired communication unit includes at least one of a power line communication module and a serial communication module (RS-485 or RS-232) for simultaneously transmitting data communication and power in a two-wire communication line,
The wireless communication unit underground facility data collection device, characterized in that it comprises at least one of the Zigbee communication module, ISA 100 communication module and Wireless HART communication module. The method according to claim 1 or 2,
The control unit,
And an underground facility data collection device which switches to the backup communication unit when the number of communication errors occurring in the basic communication unit accumulates more than a predetermined reference number or continuously does not communicate when the measurement data is transmitted. The method of claim 1,
The measuring device is a flow meter for measuring the flow rate of water supply and sewage, the power management unit underground facility data collection device, characterized in that for supplying power to the flow meter. In the data transmission method of the data collection device for underground facility management,
a) collecting measurement data measured by an instrument installed in an underground facility;
b) determining one of a wired communication unit and a wireless communication unit as a basic communication unit and using the same, transmitting the measurement data to a terrestrial repeater;
c) if a communication error occurs during transmission of the measurement data using the basic communication unit, determining whether a cumulative number of communication errors that fail to transmit the measurement data is equal to or greater than a reference number of settings; And
d) if the cumulative number of communication errors is equal to or greater than the set reference number, switching to another backup communication unit to transmit the measurement data;
Underground facility data collection method comprising a. The method of claim 5, wherein
Step d),
And adding communication error information including at least one of information encoding the cause of the communication error, the number of times of failure, time and identification information of the communication module, and installation location information to the measurement data.

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