KR101906192B1 - Scada system and operating method thereof - Google Patents

Abstract

The present invention relates to a SCADA system and an operating method thereof. The system can monitor status information of a field device measured by a remote terminal in an emergency situation without a loss. The SCADA system comprises a remote terminal, a master server, a state information generating device, and a remote camera.

Description

[0001] SCADA SYSTEM AND OPERATING METHOD THEREOF [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scada system and an operation method thereof, and more particularly, to a scada system and an operation method thereof that can monitor state information of a field device measured by a remote terminal in an emergency situation.

Supervisory Control Acknowledgment (SCADA) system collects status information data (points) of a remote device in a remote terminal unit (RTU) using an analog or digital signal on a communication path, stores and displays the same, It is a system that monitors and controls the remote device from the central control system.

In the Scada system, most control operations are performed automatically by the RTU and PLC (Programmable Logic controller), and the control commands that the operator can control are usually limited to basic operation changes or management level operations. Data acquisition is initiated by the RTU or PLC, which includes reading the instrument readings required by the Scada system and reporting the status of each instrument. The data thus obtained is converted into a human-understandable form so that operators using the HMI in the control center can make appropriate judgments for system management. The RTU or PLC is thus modified or adjusted by the operator's decision.

The Scada system is a system that controls and monitors the physical processes such as electricity transmission, gas or oil transportation, water supply, road signaling system, so it is important to monitor the data stably.

There has been disclosed a technique for performing remote monitoring using moving images in a prior art document such as a registered patent publication No. 10-1662577 (a real-time moving image remote monitoring apparatus and method of a SCADA system, published on October 19, 2016) However, there is a limitation in that it is possible to perform video remote monitoring only for passive equipment in which the reference mark is fixed in advance.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a scada system capable of monitoring state information of a field device measured by a remote terminal in an emergency situation without loss.

According to an aspect of the present invention, there is provided a communication system including a remote terminal for measuring status information of a field device and transmitting the status information to a master server, a remote camera installed near the remote terminal, a master server for receiving the status information from the remote terminal, And a status information generating device for generating status information of a field device, the method comprising: if the status information is not received from the remote terminal for a preset time, The remote camera receiving the control signal acquires an image of the remote terminal and transmits the acquired image to the state information generating apparatus, Extracting image feature information, the state information generating apparatus comprising: Searching the remote terminal information matching the extracted image feature information in the database 178, the state information generating device extracts, from the image using the image element included in the remote terminal information, Attaching a background tag to the minutiae when the minutiae point is extracted consecutively from a plurality of frames included in the image by a predetermined number and the extraction position of the minutiae is constant, Wherein the state information generating apparatus includes a step of attaching a data tag to the feature points if the feature points are continuously extracted from a plurality of frames included in the image and the extracted positions of the feature points are not constant, The apparatus may further comprise means for receiving, from the remote terminal information, Wherein the state information generation device includes a step of inserting a measurement value into the data tag using tag information previously attached to the identified image element, And generating the video status information of the field device using the frame-by-frame reception time and the measurement value embedded in the data tag.

According to the present invention, it is possible to monitor the state information of a field device measured by a remote terminal in an emergency in a Scada system without loss.

1 is a view for explaining a Scada system according to an embodiment of the present invention;
2 is a block diagram illustrating an apparatus for generating status information according to an embodiment of the present invention.
FIG. 3 illustrates a method of operating a Scada system according to an embodiment of the present invention,
4 is a flowchart illustrating a state information generating method of the state information generating apparatus according to an embodiment of the present invention.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components, and all combinations described in the specification and claims can be combined in any manner. It is to be understood that, unless the context requires otherwise, references to singular forms may include more than one, and references to singular forms may also include plural forms.

1 is a view for explaining a Scada system according to an embodiment of the present invention. Referring to FIG. 1, a scada system 100 according to an exemplary embodiment of the present invention includes a remote terminal 110, a remote camera 130, a master server 150, and a status information generating apparatus 170.

The remote terminal 110 is a device for measuring and controlling the status information of the field device 50 and includes a programmable logic controller (PLC), a remote terminal unit (RTU), an intelligent electronic device (IED), a console panel, And the like.

The remote terminal 110 is directly connected to a physical infrastructure such as a sensor or an actuator installed in the field device 50, converts the signal into digital data that can be recognized by the computer, . The status information is information indicating the status of the field device 50 and includes measurement data received from a physical device, various status data, sensor data, and the like. Can be different.

The remote terminal 110 may measure status information, convert the status information into digital data, and transmit the digital data to the master server. Depending on the function, the remote terminal 110 may control an actuator or a relay of the corresponding device according to a control command received from the master server 150 .

The remote camera 130 is installed together with the remote terminal 110 at an industrial site and can transmit a monitoring image photographed in the field of the process or equipment operation status to the master server 150 in real time. The remote camera 130 may be rotatable and may be zoom-in or zoom-out. Accordingly, when a plurality of remote terminals can be photographed where the remote camera 130 is installed, The master server 150 transmits a control signal for setting the rotation angle and magnification of the remote camera 130 to the remote camera 110 so that the master server 150 can acquire the front side image of the remote terminal 110 to be photographed, (130). The remote camera 130 may transmit the photographed image to the state information generating apparatus 170 according to the control signal.

The master server 150 may receive the status information from the remote terminal 110. If the status information is not received from the remote terminal for a preset time, Can be transmitted. In addition, the master server 150 edits the state information received from the remote terminal 110 using predetermined images, graphs, animations, and the like, and displays the edited state information on the control terminal (not shown) And monitor and control the operation status of the equipment.

The state information generation device 170 generates state information of the field device 50 in an emergency. 2, an apparatus 170 for generating status information according to an exemplary embodiment of the present invention includes a communication unit 171, an extraction unit 173, a search unit 175, a tag attachment unit 177, a database 178, , And a state information generating unit 179.

The communication unit 171 collects images of the remote terminal from the remote camera. At this time, the image includes one or more frames. The communication unit 171 can also transmit the generated status information to the master server 150. [

The extracting unit 173 can extract the image feature information from the image. The image feature information is information extracted from the image of one region included in the image locally (locally) or globally (globally), and refers to vector information (descriptor) of a predetermined range of image patches located around the feature points in the image . The vector information of the image patch may include information on brightness change, color change, pattern (distribution of frequency, longitudinal edge or transverse edge), slope of image patch, brightness change over a predetermined threshold value, The image feature information has a range of values unique to each object. For example, when the instrument panel shown in FIG. 3 is included in an image, it is possible to identify that the 'instrument panel' is included in the image using the extracted image feature information. In addition, the image feature information can identify that the text AMPS is included in the dashboard image.

That is, when the instrument panel of FIG. 3 is included in the image, the extracting unit 173 extracts image feature information corresponding to texts such as 0, 30, 60, and AMPS in the image, And the image feature information, which is recognized as an overall instrument panel, can be extracted.

The search unit 175 searches the database 178 for remote terminal information that matches the extracted image feature information. In this specification, 'remote terminal information' refers to a database of the front side image of the remote terminal according to the type of the remote terminal, and the remote terminal information includes the image (image element) of each of the components included in the front side of the remote terminal, And tag information which is identification information describing the tag information. The remote terminal information may be generated in advance and stored in the database 178. In the present invention, the front side image of the remote terminal having high resolution for each type of remote terminal can be stored in the database 178 as the remote terminal information. The searching unit 175 searches the database 178 for a remote terminal that includes the most extracted image characteristic information, and a remote terminal with which image characteristic information is most matched can be derived as a search result.

For example, assume that the instrument panel shown in FIG. 3 is the instrument panel of the measurement instrument A. When the remote camera 130 captures an image of the measuring equipment A and transmits the captured image to the master server 150, the extracting unit 173 extracts image feature information corresponding to the AMPS, -, +, Once extracted, the search unit 175 may search the database 178 for the remote terminal 110 containing the above image feature information. If the measurement instrument A is included in the database 178, the remote terminal information includes all of the image feature information of the measurement instrument A. Therefore, according to the search result of the search unit 175, Measurement instrument A '.

The remote camera 130 of the present invention may be configured such that when a trouble occurs in a certain remote terminal or a problem occurs in a link between the arbitrary remote terminal and the master server 150, It is necessary for the remote terminal included in the image to identify what kind of remote terminal it is. Accordingly, the present invention can be applied to a remote terminal 110 that does not specify the remote terminal 110 photographed by the remote camera 130 and is notified of the status information of the field device 50 measured by the remote terminal 110 regardless of the type of the remote terminal 110 Can be collected. This technical feature is also in contrast to the prior art mentioned in the background art. If the invention described in the prior art can generate state information data from the collected image only by attaching the reference mark to the remote terminal in advance, It does not need a mark and does not limit the type of the remote terminal 110 to be photographed.

The tag attaching unit 177 extracts feature points corresponding to the image elements from the image using the tag information for each image element included in the remote terminal information, and consecutively extracts a predetermined number of feature points from a plurality of frames included in the image A background tag is attached to a region including a minutiae when the minutiae extraction point is constant and a predetermined number of minutiae points are consecutively extracted from a plurality of frames included in the image and if the minutiae extraction position is not constant, The data tag can be attached to one area.

The remote terminal information includes the image element of the remote terminal and the tag information of each image element as described above. An 'image element' means an image of various components displayed on the front of a remote terminal, that is, an area including a component. Depending on the type of the remote terminal, the image elements included in the remote terminal information may be different. For example, a unit of measurement data value, a measurement value, and the like may be included. If the remote terminal includes a display panel, the panel may also be an image element. If the remote terminal includes a ramp, the image element may include a ramp, and if the remote terminal is an analog instrument, the image element may include arrows, scales, and the like.

The tag information is identification information describing each image element and is attached to the corresponding image element. For example, referring to FIG. 3, each of -, +, AMPS, number, scale, and arrow may be image elements, and tag information describing each image element may be attached to each image element. For example, tag information such as negative and negative may be attached to the image element 550, and '30' may be attached to the image element 552 as tag information. An 'arrow' may be attached to the image element 530 as tag information.

The tag information may be generated and attached by an administrator when creating the database 178, and tag information learned for each image element may be attached through machine learning.

The tag attaching unit 177 extracts feature points corresponding to the respective image elements from the image collected through the remote camera 130 using the image elements included in the remote terminal information. This may be more specific than extracting the image feature information performed by the extracting unit 173. [ If the extracting unit 173 randomly extracts an area in which the color change is abruptly performed, extracting the feature points from the tag attaching unit 177 may include extracting feature points based on the image elements included in the remote terminal information The extraction target is more clear in that it extracts the same or similar minutiae as the minutiae.

The tag attaching unit 177 extracts the feature points from each frame of the image, and if the predetermined number of the feature points are extracted consecutively from a plurality of frames included in the image, the tag extracting unit 177 identifies the extracted positions of the feature points. If extracting positions of feature points are fixed, a background tag is attached to the feature points, and if the extracted positions of feature points are not constant in a plurality of frames, a data tag is attached.

For example, assume that the instrument panel shown in FIG. 3 is photographed. The arrow is an image element for displaying the value of the current measured at the field device 50, and moves according to the current value of the field device 50. Therefore, since the position of the feature point corresponding to the image element corresponding to the arrow in the plurality of image frames will continuously change, the data tag may be attached to the feature point corresponding to the arrow. On the other hand, since the feature points corresponding to image elements corresponding to the background such as numbers and scales will appear at the same position in all frames, a background tag will be attached.

The state information generation unit 179 identifies the image element corresponding to the position information of the data tag in the remote terminal information, inserts the measurement value into the data tag using the tag information attached to the identified image element, The video state information of the field device 50 can be generated using the star reception time and the measurement values inserted into the data tag.

The state information generation unit 179 derives a real time measurement value using the tag information included in the remote terminal information corresponding to the image collection time and the location information of the data tag. For example, referring to FIG. 3, the position of the arrow end point with the data tag attached at 10:00 corresponds to the position of the image element tagged with '30' in the remote terminal information, The current value of the field device 50 measured by the remote terminal 110 photographed by the remote camera 130 at 10:00 is +30 amperes, and the state information The unit 179 can generate the state information of the field device at 30 amps with the data value of the corresponding time.

The communication unit 171 transmits the state information of the field device thus generated to the master server 150. [ Therefore, if the state information is not received from the remote terminal A 110 for a predetermined time, the master server 150 receives the state information of the field device 50 measured by the remote terminal A 110 from the state information generating device 170 . Accordingly, the master server 150 can continuously receive the status information of the field device 50 until the failure of the connection state between the remote terminal A 110 and the master server 150 is recovered.

The remote camera 130 according to an exemplary embodiment of the present invention may not be installed in all the remote terminals 110 but may be installed in an important remote terminal 110 where a large problem may occur in the event of a monitoring failure .

According to the present invention, if there is a problem in a link between a certain remote terminal 110 and the master server 150 and no more status information is received from the remote terminal 110, the master server 150 transmits the status information to the remote terminal 110 The remote camera 130 transmits a control signal to the remote camera 130 to allow the remote camera 130 located near the remote terminal 130 to photograph a front side image of the remote terminal 110 that does not transmit status information, And transmits the image to the status information generating apparatus 170. [ The state information generating apparatus 170 can generate state information using the received image. Therefore, according to the Scada system of the present invention, when a problem occurs in a specific remote terminal 110, the state information generator 170 can generate digital state information that can be used for statistical and graphic generation. The state data generated by the state information generating apparatus 170 is transmitted to a control terminal (not shown), and the administrator can monitor the field device 50 at a remote site.

4 is a flowchart illustrating a method of operating a Scada system according to an embodiment of the present invention.

According to an embodiment of the present invention, the master server receives the status information of the field device from the remote terminal (S10). If it is determined that the status information is not received for a preset time (S30) A control signal for controlling the camera to photograph a remote terminal can be transmitted (S50). The remote camera receiving the control signal acquires the image of the remote terminal (S70), and transmits the acquired image of the remote terminal to the state information generating apparatus (S90)

The state information generation apparatus collects the image of the remote terminal through the remote camera (S100), and extracts image feature information from the image (S200). Next, the state information generation apparatus searches for the remote terminal information matched with the extracted image characteristic information in a database generated in advance (S300). Then, using the image element included in the remote terminal information, the feature point corresponding to the image element (S400). The state information generation apparatus determines whether or not a predetermined number or more of feature points are continuously extracted from a plurality of frames included in the image (S500). If it is determined in step S600 that the feature points are extracted consecutively for a predetermined number of times or more, it is determined whether or not the extraction positions of the feature points are constant. If it is determined in step 600 that the extraction position of the feature points is constant, a background tag is attached to the feature points (S700). If the extraction positions of the feature points are not constant, the state information generation apparatus attaches the data tags to the feature points (S750). In operation S830, the state information generation device generates state information of the field device, identifies an image element corresponding to the location information of the data tag in the remote terminal information (S830), and adds tag information attached to the identified image element (S850), and the state information of the field device can be generated using the measurement time inserted into the data tag and the reception time of each frame (S870). The generated state information of the field device may be transmitted to the master server and used for monitoring the field device of the administrator (S900).

Some embodiments omitted in this specification are equally applicable if their implementation subject is the same. It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be exemplary and explanatory only and are not restrictive of the invention, The present invention is not limited to the drawings.

50: Field equipment
100: Scada System
110: remote terminal
130: Remote camera
150: master server
170: Status information generating device

Claims (4)

A remote terminal installed in the vicinity of the remote terminal, a master server receiving the status information from the remote terminal, a state generating state information of the field device in an emergency A method of operating a Scada system including an information generation device,
If the status information is not received from the remote terminal for a preset time, transmitting a control signal to the master server to control the remote camera to photograph an image of the remote terminal;
The remote camera receiving the control signal acquires an image of the remote terminal and transmits the acquired image to the state information generating apparatus;
Extracting image feature information from the image;
Wherein the status information generation device searches for remote terminal information matching the extracted image feature information in a database;
Extracting a feature point corresponding to the image element from the image using the image element included in the remote terminal information;
Wherein the state information generating device includes a step of attaching a background tag to the minutiae when the minutiae points are consecutively extracted from a plurality of frames included in the image and the extraction position of the minutiae is constant;
Wherein the state information generating device includes a step of attaching a data tag to the minutiae if the minutiae points are consecutively extracted from a plurality of frames included in the image and the extraction position of the minutiae is not constant;
Wherein the state information generation device identifies an image element corresponding to the location information of the data tag in the remote terminal information;
Wherein the state information generation device comprises: a step of inserting a measurement value into the data tag using tag information which is identification information for describing the identified image element;
Wherein the status information generating device includes generating the video status information of the field device using the reception time of each frame and the measurement value inserted in the data tag.
The method according to claim 1,
Wherein the image element is an image of each of the components forming a front side of the remote terminal, and the tag information is identification information describing the image element.
In the Scada system,
A remote terminal for measuring status information of the field device;
A master server for transmitting a control signal for controlling the remote camera to photograph an image of the remote terminal if state information is not received from the remote terminal for a preset time;
A state information generating device for generating state information of the field device in an emergency;
And a remote camera for acquiring an image of the remote terminal according to the control signal and transmitting the acquired image to the status information generating apparatus,
The state information generation device
A communication unit for receiving the image of the remote terminal from the remote camera and transmitting the generated status information to the master server;
An extracting unit extracting image feature information from the image;
A searching unit for searching remote terminal information matching the extracted image feature information in a database;
Extracting a feature point corresponding to the image element from the image using the tag information for each image element included in the remote terminal information, extracting a predetermined number of feature points consecutively from a plurality of frames included in the image, Attaching a background tag to a region including the feature point if the extracted position is constant, extracting a predetermined number of feature points successively from a plurality of frames included in the image, and if the extracted position of the feature points is not constant, A tag attaching unit attaching a data tag to a region including the tag;
Identifying the image element corresponding to the positional information of the data tag in the remote terminal information, inserting the measured value into the data tag using tag information which is identification information for describing the identified image element, And a state data generator for generating state information of the field device using time and measurement values inserted in the data tag.
The method of claim 3,
Wherein the image element is an image of each of the components constituting a front portion of the remote terminal, and the tag information is identification information describing the image element.

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