KR20110114942A - Remote terminal unit of waterworks and sewage observation system - Google Patents

Abstract

A remote terminal device of a water and sewage observation system is disclosed. The data collection unit collects and stores data measured by a measuring sensor installed in the water and sewage system at time intervals corresponding to a preset collection cycle. The transmission control unit transmits the data stored in the data collection unit to an external monitoring control station through a communication network at a time interval corresponding to a preset transmission period, but the data is collected if the data value does not belong to a preset reference range. At the point of time it is sent to the monitoring and control station. The transmission control unit is connected to an external solar cell module, a storage battery, and an AC power supply to supply power to the data collection unit, the transmission control unit, and the measurement sensor. The power is supplied to the data collection unit only at the time of collecting data from the measurement sensor, and the power is supplied to the transmission control unit only at the time of transmitting the data to the monitoring control station. According to the present invention, the power is selectively supplied to the corresponding components only at the time of collecting and storing data from the measurement sensor installed in the water supply and sewage system, and at the time of transmitting the stored data to the monitoring control station. Mode of operation can reduce power consumption.

Description

Remote terminal unit of water and sewage observation system {Remote Terminal Unit of waterworks and sewage observation system}

The present invention relates to a remote terminal device of a water and sewage observation system, and more particularly, to an apparatus for collecting and storing data measured by a flow meter and a pressure gauge, and transmitting the stored data through a communication network.

Water and sewage station systems use a supervisory control system that operates and manages on a block-by-block basis with flow meters, pressure gauges, and water quality. The supervisory control system detects signals output from flow meters and pressure gauges, and records and stores the measured data in the logger memory at predetermined time intervals. The stored data is transmitted via leased line modem, Internet modem or CDMA communication network in accordance with the request for data transmission from the monitoring and control station or other established conditions.

Such a supervisory control system is operated and managed by an AC power source, and has a disadvantage in that power consumption is large due to the characteristics of a system that collects and transmits data in real time. It is also economically inefficient because it continues to consume power even when no data is being collected or transmitted.

There is a need to build an environment-friendly monitoring and control system while overcoming the above disadvantages to minimize power consumption.

An object of the present invention is to provide a remote terminal device of a water and sewage observation system that can be eco-friendly while minimizing the power consumption of the water and sewage monitoring and control system.

In order to achieve the above technical problem, the remote terminal device of the water and sewage observing system according to the present invention, the data collected by the measurement sensor installed in the water and sewage system at a time interval corresponding to a pre-set collection period and stores the data Collecting unit; The data stored in the data collection unit is transmitted to an external monitoring and control station through a communication network at a time interval corresponding to a preset transmission period, but the data is collected when the value of the data does not belong to a preset reference range. A transmission control unit for transmitting to the monitoring control station at the time point And connected to an external solar cell module, a storage battery, and an AC power supply unit to supply power to the data collection unit, the transmission control unit, and the measurement sensor, and cut off the power supply if the data collection unit and the transmission control unit do not operate. A power control unit supplying power to the data collecting unit only at a time when the data collecting unit collects data from the measuring sensor, and supplying power to the transmitting control unit only at a time when the transmitting control unit transmits data to the monitoring control station; Equipped.

According to the remote terminal device of the water and sewage observing system according to the present invention, selectively supplying power to the corresponding components only at the time of collecting and storing data from the measurement sensor installed in the water and sewage system and transmitting the stored data to the monitoring control station. At other times, power consumption can be reduced by shutting down the power or allowing it to operate in a power saving mode. In addition, by using the solar cell module as a primary power supply means it is possible to obtain the economic advantages and the effect of eco-friendly facilities.

1 is a block diagram showing the configuration of a preferred embodiment of a remote terminal device of the water and sewage observation system according to the present invention;
2 is a view illustrating an embodiment in which a user interface unit is implemented in a panel form and installed on the front and rear surfaces of a remote terminal device according to the present invention, respectively;
3 is a diagram illustrating an example of an initial screen of a message and data display unit and a screen during operation;
4 is a diagram illustrating an embodiment in which a remote terminal device according to the present invention is implemented in an actual water and sewage observation system.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of a remote terminal device of the water and sewage observation system according to the present invention.

1 is a block diagram showing the configuration of a preferred embodiment of a remote terminal device of the water and sewage observation system according to the present invention.

Referring to FIG. 1, the remote terminal device 100 according to the present invention includes a data collecting unit 110, a transmission control unit 120, a power control unit 130, and a user interface unit 140.

The data collection unit 110 collects and stores data measured by a measurement sensor installed in the water and sewage system at a time interval corresponding to a preset collection cycle. Here, the measuring sensor includes a flow meter and a pressure sensor installed at each measuring point of the measuring flow path. The data acquisition unit 110 receives the data in the form of a BCD code or pulse transmitted from such a measuring sensor, and when the analog input board (AICB) is mounted, the analog signal of 4 ~ 20mA, 0 ~ 1V and 0 ~ 5V And digital input / output boards can be used to input and output up to 32-point digital contact signals. It can also be equipped with a RS-232C port to collect data by mounting a wireless modem.

The collection period in which the data collection unit 110 receives data from the measuring sensor and stores the data is set in advance and may be changed by the user's setting. The settable collection cycles can be 1 minute, 5 minutes, 10 minutes, 20 minutes, 30 minutes and 60 minutes. Water and sewage monitoring systems need to check flow rate fluctuations, flow rates, and hydraulic fluctuations periodically, unlike systems that transmit data only under certain conditions, such as flood forecasting systems. Therefore, basically, data of the measurement sensor is collected at a collection cycle set by a user or a collection cycle set by a user. Meanwhile, the data may be stored whenever a specific event occurs, that is, whenever the value of the measured data is out of a preset range without setting the collection period by time.

As a data storage method of the data collection unit 110, when the memory space is insufficient using a circular storage method, newly collected data is stored while being sequentially removed from the oldest data. In addition, the data stored in the memory is safely stored even when there is no power supply from the power control unit 130 by the self-contained backup battery.

The data stored in the data collection unit 110 may be transmitted to the monitoring and control station by the transmission control unit 120, but the user may directly connect a device such as a laptop to download necessary data from the data collection unit 110. .

The transmission control unit 120 transmits the data stored in the data collection unit 110 to an external monitoring control station through a communication network at a time interval corresponding to a preset transmission period, but the data value does not belong to a preset reference range. If not, the data is sent to the monitoring station at the time the data is collected.

The transmission control unit 120 may use a CDMA communication module to transmit the stored data to the monitoring control station. That is, the transmission control unit 120 may perform data transmission with the CDMA modem mounted on the TM server of the monitoring and control station using the CDMA modem provided separately. It is also possible to transmit data to the supervisory control station via an auxiliary network using other VHF radio modems or dedicated line modems (2W / 4W).

As mentioned above, the transmission control unit 120 may transmit the data stored in the data collection unit 110 to the monitoring control station according to a transmission period set in advance. This is because it is necessary to periodically observe the water and sewage system in the monitoring and control station, similarly to collecting and storing the data measured by the measuring sensor in the data collection unit 110 according to the collection cycle. However, if an unexpected event occurs, that is, a situation such as a decrease in flow rate and hydraulic pressure due to leakage, etc., it is necessary to immediately notify the monitoring control station.

Therefore, when the value of the data collected by the current data collection unit 110 does not belong to a preset reference range, the transmission control unit 120 may, for example, have a flow rate at a specific point of the water and sewage system less than or equal to 80% of the average flow rate. In case of decrease, the data is sent to the monitoring control station immediately at the time of data collection.

On the other hand, it is also possible for the transmission control part 120 to transmit data by the data transmission request from a monitoring control station. That is, when a data transmission request is received from the monitoring control station through the communication network between the transmission control unit 120 and the monitoring control station, the transmission control unit 120 checks the data stored in the data collection unit 110 at that time. Can be sent. In addition, in addition to the case where an abnormality occurs in the value of the data measured by the measuring sensor, when the abnormality occurs in the remote terminal device 100 itself according to the present invention, for example, when an abnormality occurs in power supply, Together, a signal indicating an abnormal occurrence can be transmitted. At this time, if the CDMA network is in use, it can be transmitted via SMS (text message).

The power control unit 130 is connected to an external solar cell module, a storage battery and an AC power supply to supply power to the data collection unit 110 and the transmission control unit 120, but the data collection unit 110 and the transmission control unit 120 If not, the power supply is cut off, the data collector 110 supplies power to the data collector 110 only at the time of collecting data from the measurement sensor, and the transmission controller 120 transmits data to the monitoring control station. The power is supplied to the transmission control unit 120 only at the time.

The water and sewage observation system including the remote terminal device 100 according to the present invention uses a solar cell module as a power supply means to implement power-saving facilities while reducing power consumption. That is, the solar cell module is used as the primary power supply means, and when the solar cell module cannot be used, power is supplied from the battery (battery) as the secondary power supply means, and both the solar cell module and the battery are used. If this is not possible, use AC power as a tertiary power supply. At this time, power is supplied to the storage battery while the solar cell module and the AC power are used as the power supply means.

In addition, the power control unit 130 may be applied to a sleep mode for supplying power only to a portion necessary for reducing power consumption and extending the life of the battery. As described above, the data collection unit 110 collects data from the measurement sensor according to a certain collection period, and the transmission control unit 120 basically also transmits data to the monitoring control station according to a certain transmission period, and other monitoring Data is transmitted at the request of the control station or when an error occurs.

As such, since the data collecting unit 110 does not continuously collect data, and the transmission control unit 120 does not continuously perform data transmission, it is inefficient to continuously supply power even during a time when data collection or transmission is not performed. to be. Therefore, the power control unit 130 supplies power to the data collecting unit 110 according to a data collection period, which is a time for the data collecting unit 110 to collect data, and is a time for the transmission control unit 120 to transmit data. Power is supplied to the transmission control unit 120 according to the data transmission cycle. To this end, the power control unit 130 has information on a collection cycle and a transmission cycle set for the data collection unit 110 and the transmission control unit 120, respectively, and the data collection unit 110 and the transmission control unit 120 collect the information. The power is supplied at regular time intervals to be activated according to the cycle and the transmission cycle.

In addition to transmitting data at regular intervals, the transmission control unit 120 also transmits data when a special situation occurs, such as a request from the monitoring control station or an abnormality in the data value. The power control unit 130 should supply power to the transmission control unit 120 even when a situation in which data should be transmitted at a time other than the predetermined time interval occurs.

Therefore, the data transmission request from the monitoring control station is also input to the power control unit 130. When the data transmission request is received from the monitoring control station when the transmission control unit 120 is in the power saving mode, the power is immediately supplied to the transmission control unit 120. Allow data to be transferred. In addition, the data collection unit 110 inputs a control signal to the power control unit 130 in the event of an abnormality such that the value of the collected data is out of the reference range, the power control unit 130 is immediately transmitted when the control signal is input Power is supplied to the control unit 120 to start the data, and transmit data to the monitoring control station.

In addition, the remote terminal device 100 according to the present invention includes a separate recording device (not shown) for the operation state, operation time, etc. of various components including the data collection unit 110 and the transmission control unit 120. Information can be stored. In addition, the recording device (not shown) may also store information such as start-up by a call of the monitoring control station of the remote terminal apparatus 100 according to the present invention, start-up for testing, and the like. Like the data collection unit 110, the recording device (not shown) uses a cyclical storage method, so that when the storage space is insufficient, only the information for the last predetermined period is stored by first deleting the oldest information. In addition, the information stored in the recording device (not shown) can also be transmitted through a communication network by a request from the monitoring and control station, or the user can directly connect and download the terminal.

Furthermore, the remote terminal device 100 according to the present invention may have a function of monitoring its own operation state by a watch dog timer (WDT) and automatically recovering when an abnormal phenomenon such as a holding phenomenon occurs. That is, information necessary for maintenance and repair, such as power supply voltage drop and communication check with the monitoring and control station, may be collected and recovered in case of abnormality.

The user interface unit 140 is provided to allow a user to check data stored in the data collecting unit 110, various operation information stored in a recording device (not shown), and other setting contents. The user interface unit 140 provides a lamp indicating the power supply state, the communication state with the monitoring and control station, the data collection state from the measurement sensor, and whether an error has occurred, and an operation command for setting change from the user. An operation key for receiving an input and a display for displaying a value of data collected by the data collection unit 110 and setting contents according to an operation command are displayed on a screen.

A user may directly download his / her stored data and information by connecting his terminal to the remote terminal device 100 according to the present invention through the user interface 140. In this case, to select and download only specific data or information, the stored data and information may be searched through a display provided in the user interface 140, for example, an LCD. Searching and selecting data and information may be performed using an operation key provided in the user interface unit 140.

In addition, the user may set parameters related to the operation of each component of the remote control apparatus 100 including the data collecting unit 110, the transmission control unit 120, and the power control unit 130 by using the operation key. As described above, the parameter to be set includes a data collection cycle by the data collection unit 110, a data transmission cycle by the transmission control unit 120, and the like. The setting of the parameter is possible not only by inputting an operation command through an operation key but also through a communication network, and the set parameter can be safely stored even when the power is cut off by using a nonvolatile memory and a backup battery.

Hereinafter, an embodiment including specific specifications of each component when the remote terminal apparatus 100 according to the present invention is actually implemented and operated will be described.

First, the remote terminal device 100 according to the present invention may be designed to operate in an environment at a temperature of −30 to 60 ° C. and a humidity of 95% or less. The operable voltage is 12V to 24V and the rated voltage is 13.8V. When the remote terminal device 100 is implemented, the material of the enclosure may be SUS304 1.5T, the size of which is 700 (W) × 1400 (H) × 400 (D) mm, and the total height is 2200mm when the solar cell module is included. do.

Meanwhile, specific specifications of the transmission control unit 120 are shown in Table 1 below.

CPU Industrial Microprocessors (PLCC Type) Memory Program memory 128Kbytes
32KB history memory (battery backup)
Logger Memory 512KB / 4M (Battery Backup) Communication port
-COM0
-COM1
-COM2 Serial 3-port
VHF / RF-Modem Communication Port (RS-232C, RTS / CTS)
CDMA / TCPIP Communication Port (RS-232C)
Front Panel Monitor Port (RS-232C) Communication speed Async 1200, 2400, 4800, 9600, 19200 bps Communication method Half- or full-duplex Data bits 8-bit, 1-stop bit, no parity bit Flow control RTS / CTS or DTR / DSR, XON / XOFF Real time clock Leap Year, Leap Month Automatic Processing Watch Dog Timer Auto reset Built-in I / O Port Digital 24-point (in or out)
Pulse 4-point (photo isolated input)

Specific specifications of the data collection unit 110 are shown in Table 2 below.

Logger Module Type CPU module integrated electronic recorder Data storage method Circulation method Data storage
Pulse data
Analog data
Historical data SRAM 4 MB
Save up to 16384-point
Save up to 16384-point (approximately 680 days at 1 hour intervals)
4096-point Record type ASCII text code How to preserve your data 3V lithium battery backup Input signal type Pulse type (option)
BCD 4-digit & parity & BUSY
RS 422 / 485C Serial (ASCII Text, 9600bps) Download RS-232C serial (ASCII text, 9600 bps) Record item Date and time (year / month / day / hour / minute)
Measurement data, power voltage and other instrument status information Setup and operation One touch menu selection method Recording time interval
-pressure
-flux
Choose from 1, 5, 10, 20, 30, or 60 minute intervals
Stored every time a pulse event occurs

In addition, specific specifications for changing various settings and downloading data provided by the user interface unit 140 are as described in Table 3 below.

display 20 Char × 4 Line High Brightness LCD (Backlight)
Message and data display Operation keys 16-key (one-touch membrane button) Monitor port RS-232C serial port
For downloading logger data (measured data) and historical data Status lamp CDMA / RF-modem or external communication status display
AUX port (COM1, COM2) status display
Other operation status indicator lamp Etc ON / OFF switch

2 is a diagram illustrating an embodiment in which the user interface 140 is implemented in a panel form and installed on the front and rear surfaces of the remote terminal device 100 according to the present invention, respectively. As shown in FIG. 2, the front panel has a size of 483 × 88 mm, and the rear panel has a size of 430 × 85 mm.

First, the configuration of the front panel of the user interface unit 140, the power switch unit 210 to manually turn on or off the power supplied to the remote terminal device 100 according to the present invention. It is equipped with a monitor connection port for connecting a user terminal, such as a power switch and a notebook, to monitor an operation state or a communication state with an external device and to download data.

Next, the status display lamp unit 220 is composed of eight lamps, the POWER lamp indicating that power is currently supplied to the remote terminal device 100 in order from the leftmost lamp, and an abnormal state of the supplied power voltage. PWLOW lamp which is on when voltage falls below a certain standard, for example, 10V to indicate data transmission status with modem (CDMA or wired modem) and supervisory control station.Red light in receiving mode and green in transmitting mode COM0 lamp, COM1 lamp indicating data transmission / reception status through COM1 port, COM2 lamp indicating data transmission / reception status through COM2 port, CD lamp which is turned on when CDMA or dial-up modem is connected to monitoring control station, data from measuring sensor SD lamp that indicates transmission and reception and ERR lamp that is turned on when an error occurs.

The message and data display unit 230 is implemented as an LCD, and displays the operation state and setting contents of the system, the value of the measurement data, the operation menu, and the like so that the user can visually check the data. It is implemented with high brightness 20 char × 4 line LCD so that you can easily understand the contents of the message.

The operation key unit 240 is composed of a plurality of keys so that a user can input an operation command while checking the LCD screen, 10 keys for inputting numbers, an arrow key for moving the cursor to a desired position, and a parameter setting for When entering or modifying data, the MNU key to select an entry item, the SEL key to use when there are two or more options for the setting item, the ESC key to return to the initial setting state, to apply or confirm the entered setting data, or It is equipped with an ENT key for selection. The user may perform various operations such as setting a desired parameter or confirming stored data using the operation key 240 while checking various setting menus and data output through the message and data display unit 230.

The rear panel of the user interface unit 140 is mainly composed of ports for connection with an external device. Specifically, the control PCB detachment cover 250 is a cover for enabling the PCB detachment in a state in which the remote terminal device 100 according to the present invention is mounted.

The connection ports and terminals 260 and 280 are components for connecting an external communication sensor or device, or for connecting a door sensor, a power supply, a measurement sensor, etc., and have a bracket 270 for mounting when using a CDMA communication module. Doing.

3 illustrates an example of an initial screen of the message and data display unit 230 and a screen during operation. When the power is first supplied, a program name and version, a product serial number, a manufacturer's phone number, and a manufacturer's name are displayed on the screen as shown in FIG. 3A, while the remote terminal device 100 according to the present invention operates. As shown in (b) of FIG. 3, the current date and time, the basic setting contents and the current state, and the values of the currently collected data are displayed.

In FIG. 3 (b), [# 05_006] represents a group identification number and an observation station number, and T10 represents a storage interval of data, and data is collected every 10 minutes. In addition, B9600 represents the communication speed of the communication port and 9600bps. PRS represents current pressure data and FLW represents current flow rate data.

4 is a diagram illustrating an embodiment in which the remote terminal device 100 according to the present invention is implemented in an actual water and sewage observation system. Referring to FIG. 4, the data collection unit 110 receives and stores data measured by being connected to an external flow meter and a pressure sensor, and the transmission control unit 120 uses a CDMA modem as a main communication means and uses a TCP / IP modem. As preliminary communication means, data is transmitted to the monitoring and control station through each communication network. The power control unit 130 is connected to a solar panel, a commercial AC power source and a battery, and supplies power to each load using the solar cell module as a primary power supply means. The user interface unit 140 includes a display and an operation key to provide data and various setting information to the user and receive an operation command.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific preferred embodiments described above, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such changes are within the scope of the claims.

100-remote terminal device
110-data collector
120-Transmission control
130-power control
140-user interface unit
210-power switch
220-status indicator lamp
230-message and data display
240-Operation Key
250-PCB removal cover for control
260-Connection port and terminal
270-bracket
280-Connection port and terminal

Claims (3)

A data collector configured to collect and store data measured by a measurement sensor installed in the water and sewage system at a time interval corresponding to a preset collection cycle;
The data stored in the data collection unit is transmitted to an external monitoring and control station through a communication network at a time interval corresponding to a preset transmission period, but the data is collected when the value of the data does not belong to a preset reference range. A transmission control unit for transmitting to the monitoring control station at the time point And
Is connected to an external solar cell module, a battery and an AC power supply unit to supply power to the data collection unit, the transmission control unit and the measurement sensor, but if the data collection unit and the transmission control unit do not operate, the power supply is blocked, A power control unit supplying power to the data collecting unit only at a time of collecting data from the measuring sensor, and supplying power to the transmitting control unit only at a time when the transmitting control unit transmits data to the monitoring control station. Remote terminal device, characterized in that. The method of claim 1,
The power control unit supplies power to the data collection unit, the transmission control unit, and the storage battery by the solar cell module. When the solar cell module is not available, the power control unit supplies the data collection unit and the transmission control unit to the data collection unit. And supplying power to the data collection unit, the transmission control unit, and the storage battery by the AC power supply unit when the solar cell module and the storage battery are not available. 3. The method according to claim 1 or 2,
A lamp indicating a power supply state by the power control unit, a communication state with the monitoring control station, a data collection state from the measurement sensor, and whether an error has occurred, an operation key for receiving an operation command for setting change from a user; And a user interface unit having a display for displaying values of data collected by the data collection unit and setting contents according to the operation command on a screen.

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