KR101695001B1 - Embedded water management system with security features - Google Patents

Abstract

The present invention relates to an embedded water management system with a security function. The embedded water management system with a security function of the present invention comprises a small RTU terminal connected to a water management system to receive detection data measured by water management equipment, encrypting the received detection data, transmitting the encrypted data to an external water treatment server, and selectively controlling the water management equipment according to a control signal transmitted from the water treatment server. The small RTU terminal has an embedded system for realizing a small water management function, and makes it possible to separate an I/O monitoring module for monitoring a state and an I/O control module for control from each other, thereby providing a technique capable of separating a telemetering (TM) function and a telecontrol (TC) function, and performing the functions depending on a state monitoring purpose and control purpose.

Description

TECHNICAL FIELD [0001] The present invention relates to an embedded water management system having a security function,

The present invention relates to an embedded water management system having a security function, and more particularly, to an embedded water management system having a security function, and more particularly, to an embedded water management system having a security function, And a small RTU terminal for selectively controlling the water management equipment according to a control signal transmitted from the water treatment server, thereby providing not only convenience of maintenance but also reliability of data The present invention relates to an embedded water management system having a security function that can improve the security of the embedded water management system.

Large-scale industrial facilities, such as plants, are exposed to accidents such as large-scale explosions and power outages, which may be caused by small problems.

If a pipe in an industrial facility leaks gas, is under load, or is shut down, the administrator must know as soon as possible what the problem is and should be able to resolve it to prevent industrial accidents You can keep it.

Conventionally, RTU (Remote Terminal Unit) terminals have been installed and operated for remotely managing and controlling water treatment facilities installed in reservoirs, rivers, fresh water lakes, multi-purpose dams, and the like among industrial facilities.

These remote control stations are used in various forms depending on the physical or local environment in which they are installed, the product specification specificity of the manufacturer supplied, or the sensing or transmission characteristics of the detection equipment.

However, since the conventional remote terminal unit (RTU) terminal transmits the collected water treatment related data to a remote water treatment server without any additional security, it is possible to prevent the data related to water treatment collected or damaged And it is installed and operated in a large-scale facility in a large area, so that it takes time and expense to maintain and repair it.

Korea Patent Publication No. 2003-0095123

According to an aspect of the present invention, there is provided a method for controlling a water treatment system, comprising the steps of receiving sensed data measured by the water management device connected to a water management device, encrypting the received sensed data, And a small RTU terminal for selectively controlling the water management equipment according to a control signal transmitted from the water treatment server. Therefore, it is possible to provide a water treatment system capable of improving the reliability of data, Management system.

According to another aspect of the present invention, there is provided an embedded water management system having a security function. The embedded water management system includes a controller for receiving sensed data measured by the water management apparatus, encrypting received sensing data, And a small RTU terminal for selectively controlling the water management equipment in accordance with a control signal transmitted from the water treatment server, wherein the small RTU terminal is provided with a water management function I / O monitoring module for condition monitoring and I / O control module for control can be separated from each other. TM (Tele Metering) function Or TC (Tele Control) function.

The present invention not only provides convenience of maintenance, but also has a technical effect to improve the reliability of data.

FIG. 1 schematically shows a configuration of an embedded water management system having a security function according to the present invention.
FIG. 2 shows a detailed configuration of a small RTU according to the present invention.
FIG. 3A is a view for explaining the principle of water level measurement using an inclined water level gauge according to the present invention.
FIG. 3B shows a comparative embodiment in which an inclined water level meter and a general vertical water level meter according to the present invention are installed and operated.

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

FIG. 1 schematically shows a configuration of an embedded water management system having a security function according to the present invention.

1, an embedded water management system 100 having a security function according to the present invention includes a small RTU group 110, an encryption module group 120a, a decryption module group 120b, and a water treatment server 130 do.

The small RTU group 110 includes a plurality of first sRTUs 110-1 to N-th SRTUs 110-N, each of which is connected to a water management device and receives an electric signal To a digital signal that can be understood by the computer, and to control and monitor each water management device on a small scale.

Here, the water management equipment may include a water level meter 10 installed in a reservoir, a river, a fresh water lake, a multipurpose dam, a water gate 20 and the like. In this case, the small RTU group 110 may include water level data measured by the water level meter 10 (d1) and the state of the water gate (20) and controls the automatic opening and closing of the water gate (20) when necessary.

For example, when a plurality of water gates 20 are installed in different areas, the small RTU terminal refers to each level data or water quality data (when water quality sensor is installed) collected from each sensor, A hydrological control signal instructing to open only hydrological gates corresponding to the water depths of the optimum water quality among a plurality of formed hydrological gates can be transmitted to the corresponding hydrological gates.

The encryption module group 120a includes a plurality of first encryption modules 120a-1 to N-th encryption modules 120a-N, each of which includes a first sRTU 110-1 to an Nth sRTU 110- N, encrypts the collected data, and transmits the decrypted data to the decryption module group 120b through the network 30. [

Here, the network 30 can use a wired communication network (PLC, RS-232C, etc.), a wireless communication network (3G, 4G, LTE, LTE-A, etc.), the Internet, and a social network service (SNS).

The decryption module group 120b decrypts the encrypted data received through the network 30, creates the decrypted data in a plain text, and sends the decrypted data to the water treatment server 130. [

The water treatment server 130 receives security-enhanced water management related information (water level data, hydrological condition data, etc.) from the decryption module group 120b, and remotely manages and controls each water management device.

In this case, the water treatment server 130 transmits the received water management related information to a disk (a hard disk drive (HDD), an optical disk drive (ODD), a solid disk, SSD), etc.) in a block-by-block parallel direct storage manner.

In addition, the block parallel direct storage method can selectively control each disk by using the unique MAC address information of the board, and it is possible to control each disk in parallel without decreasing the throughput and the frame size The storage speed can be increased.

In the case of the file unit storage method, unnecessary header information of a packet and a continuous input / output (I / O) signal are generated, a transmission amount and a frame are reduced while a file system transmits a packet, By storing in a sequential manner rather than in a sequential manner, the storage speed is slow compared to the slow.

FIG. 2 shows a detailed configuration of a small RTU according to the present invention.

2, the small RTU group 110 according to the present invention includes a power supply unit 111, a communication unit 112, a data reception unit 113, a data security processing unit 114, and a control unit 115 for each small RTU .

The power supply unit 111 supplies a constant power to the internal electric devices to enable normal operation of the electric devices. For example, the power supply unit uses 9 to 30 VDC as the power source, and sleep mode (sleep mode) function.

The communication unit 112 provides an interface for performing communication with an external water treatment server 130. For example, the communication unit 112 may be a Zigbee, an RF, a WiFi, a 3G, a 4G, an LTE, (Wireless Broadband Internet), or wired communication, the Internet, and a Social Network Service (SNS).

The data receiving unit 113 receives the water level data d1 measured by the external water level meter 10 and the water level status data d2 captured in real time in which the state of the water level 20 is photographed.

In this case, the water gate 20 is photographed by surrounding cameras (dome camera, PTZ (Pan Tilt Zoom) camera, digital camera, analog camera, etc.) And transmitted to the water treatment server 130.

AVB (Audio Video Bridge) provides a transmission quality guarantee type technology for smoothly transmitting a multimedia stream such as audio and video over a LAN through the IEEE 802.1 protocol. The Bridge Mesh can be used to extend a certain amount of Ethernet frames to be transmitted between bridges at predetermined time intervals exactly at a desired time when the clocks of the bridges are synchronized. Can be used as an infrastructure for stably transmitting synchronous traffic.

The data security processing unit 114 encrypts the level data d1 and the hydrological status data d2 received by the data receiving unit 113. [

In this case, a predetermined encryption algorithm (for example, a lightweight encryption algorithm such as ARIA (Academy Research Institute Agency), ECC (Elliptic Curve Cryptosystem), etc.) is loaded as an encryption method and a hash value You can perform encryption related tasks such as creation.

The control unit 115 controls the power supply unit 111, the communication unit 112, the data reception unit 113, and the data security processing unit 114.

The small remote terminal unit (sRTU) of the present invention constructs an embedded system for implementing a small-scale special water management function. To implement this, for example, a small (2.95in (w ) X 6.3 in (h) x 4.4 in (d)) and a light weight (450 grams).

In this case, the embedded system is a compact I / O model which is an integrated type, and can be separated from the I / O monitoring module for status monitoring and the I / O control module for control, (Tele-Metering) function or TC (Tele Control) function for effective water management can be performed separately.

Meanwhile, the embedded system can implement integrated water management functions by using separate modules as needed.

Also, since the present invention implements an embedded system, it is possible to efficiently perform maintenance on the following hardware (H / W) or software (S / W).

For example, in hardware (H / W), 1) wiring break, short circuit, terminal corrosion, connection 2) insulation, ground resistance measurement 3) protective device (power supply, 5) System damage, disassembly, cleaning and repair 6) System operation status (LED status check) 7) Corrosion, moisture and dust condition check 8) Terminal board connection status can be checked.

In terms of software (S / W), 1) Various channel and port operation status 2) System configuration and parameter setting status 3) CPU update status 4) System log analysis 5) System debugging And up / down loading.

FIG. 3A is a view for explaining the principle of water level measurement using an inclined water level gauge according to the present invention.

The inclined water gauge 10a according to the present invention can measure the height of the sea surface, measure the height of the water surface, monitor the level of the reservoir, monitor the change of the water level, and the like by using an inclined laser level gauge. And a measuring method using the same will be described.

The tilted laser level gauge is a non-contact type measuring device that calculates the water level by measuring the distance to the water surface (for example, from 0.2m to 70m). It uses an infrared laser pulse (such as a wavelength of 905nm, ) Reaches the target point with a very precise internal timer, averages the repeated measurement results, and outputs the result.

Since the reflection coefficient of the water surface is very low, it can not be measured by the general method because it is scattered or absorbed, but the gradient type laser water level meter also accumulates very little light energy and applies a special signal processing technique (Beam Storage) Can be measured.

The inclined laser level gauge can be installed in a non-contact or inclined manner differently from other conventional water level measuring methods (see FIG. 3B), and the installation and maintenance cost can be drastically reduced.

In addition, the inclined laser level gauge is free from the influence of changes in temperature and density, process vibration, agitation, corrosion, foam, dust, incident angle and permittivity, It has the advantage of providing analog output (4-20mA output), serial communication output (RS-232C), switching output (RS-485).

Hereinafter, a method of measuring the water level using the water level meter 10a according to the present invention will be described.

3A, the height at which the inclined water level meter 10a is installed vertically at a predetermined height from the reference surface S2 of 0 m above sea level is h, and the inclined water level meter 10a measures a constant angle the water level H, that is, the distance from the water surface S1 to the reference surface S2 is defined as d, when the distance from the radiation direction of the beam of the water level gauge 10a to the water surface S1 is d, Is expressed by the following equation (1).

For example, H = h- (d x cos?) = 6.03- (13.73 x cos 72.42) = 1.88m when the height of the water gauge installation h = 6.03m, the inclination angle? = 72.42min .

Here, when the measurement distance d is the reciprocal time difference (t) of the laser pulse and the velocity of the laser beam (c = 3 x 10 ⁸ m / s ² ) 2 < / RTI >

FIG. 3B shows a comparative embodiment in which an inclined water level meter and a general vertical water level meter according to the present invention are installed and operated.

Referring to FIG. 3B, the water level was measured using the inclined water level gauge according to the present invention at regular intervals (same conditions) in the same area, and the results are shown in Table 1 below. The water level was measured using a general vertical water level meter The results are shown in Table 2 below.

Referring to Tables 1 and 2, the respective water level (see red color) measured at the same time (for example, 2012-09-09 00: 00: 00) for the same area represents the inclined water level according to the present invention In case of using, it showed -0.639631752m, and it showed -0.62m when using general vertical water level meter.

 It can be seen that the inclined water level gauge according to the present invention is easier to install and manage than a general vertical water level gauge, and also provides more reliable measurement data.

That is, the inclined water level meter according to the present invention is preferably installed at the top of a cylindrical pole having a constant height, that is, a constant length and width, vertically from a reference plane S2 at 0 m above sea level ), It is freely rotatable with a certain inclination angle, and the water level of the water surface is measured in an arbitrary direction, thereby obtaining the stable water level data which is less influenced by the surrounding environment (installation place, weather condition, wave, etc.) Respectively.

On the other hand, since the general vertical type water level meter is limited in that the water level data can be measured only in the vertical direction with respect to the water surface, the installation place is also influenced by the surrounding environment (installation place, weather condition, wave, etc.) In addition, it is difficult to install and maintain the water level data. In addition, when the water level is damaged due to high waves, the water level data may not be obtained, which may cause data reliability problems.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention.

110: Small RTU group
111:
112:
113: Data receiving unit
114: Data security processing unit
115:
120a: Encryption module group
120b: decryption module group
130: Water treatment server
10: Water gauge
20: Water gate
30: Network

Claims (8)

A control unit for receiving the sensed data measured by the water management equipment in connection with the water management equipment, encrypting the sensed data received and transmitting the sensed data to an external water treatment server via a network, A small RTU terminal for selectively controlling water management equipment,
The small RTU terminal has an embedded system for implementing a small-scale water management function, and an I / O monitoring module for status monitoring and an I / O control module for control can be separated from each other , TM (Tele Metering) function or TC (Tele Control) function is separated according to the purpose of status monitoring and control purpose,
The water management equipment includes a water level meter and a water gate,
The water level data measured by the water level meter and the hydrological condition data of the water canal state data are transmitted to the water treatment server based on AVB (Audio Video Bridge), stored in the water treatment server in a block unit parallel direct storage manner,
The water level meter,
Using an inclined laser level gauge,

(Where h is the height at which the oblique laser level gauge is vertically installed from the reference plane at 0 m above sea level, d is the measurement distance from the radiation direction of the beam of the oblique laser level gauge to the water surface, Vertical distance from the water surface to the reference plane)
And the water level (H) is measured in accordance with the detected water level. The terminal of claim 1, wherein the small RTU terminal comprises:
A power supply unit for supplying a constant power to an internal electric device;
A communication unit for providing an interface for performing communication with the water treatment server;
A data receiving unit for receiving the sensed data measured through the water management equipment in real time;
A data security processing unit for encrypting the sensing data received by the data receiving unit; And
And a control unit for controlling the power unit, the communication unit, the data receiving unit, and the data security processing unit. The communication system according to claim 2,
3G, 4G, LTE, or LTE-A. ≪ / RTI > delete delete delete delete The apparatus according to claim 1, wherein the gradient type laser water level meter comprises:
Wherein the sensor is installed at the top of the pole so that the water level of the water surface can be measured freely in a freely rotatable manner with a constant inclination angle.

Images