KR20090038111A - Flood surveillance and forecasting system - Google Patents

Abstract

A system for monitoring and forecasting a flood is provided to secure effectiveness and convenience of a bridge monitoring service through a real-time remote monitoring and forecasting information. A field measurement system(1) includes a CCTV camera(11), a water surface meter(12), a field controller(13), and a signal conversion transmitter(14). The CCTV camera is controlled by the field controller. The water surface meter calculates a distance from a sender to a water surface by receiving a reflective sound wave reflected in the water surface after transmitting a sound wave toward the water surface. The signal conversion transmitter transmits a water surface data and an image signal measured in a bridge to a position in which a field monitoring system(2) is installed.

Description

Flood surveillance and forecasting system

The present invention observes the level of a plurality of railroad bridges in real time, sets the margins of railroad bridges, establishes the criteria for alerting and releasing alarms and warnings of warning, boundary, danger, and flooding according to the level of risk of level rise, and identifies the trend of water level change. Providing analysis, forecasting information

The bridge overpass and railway operating km link are linked with the operating speed of the train to analyze the bridge passable area by predicting the level rise of the bridge.

Some railroad bridges do not have sufficient margin for flood levels. Fundamentally, river dredging or rebuilding bridges high would be a countermeasure, but there are constraints that are not realistic in terms of economic or environmental conditions. Therefore, real-time water level measurement and observation is made in preparation for flooding, and it is integratedly analyzed to prepare alarm and release alarm according to the degree such as risk and flooding linked with margin of railroad bridge and regulation of train operation accordingly. There is a need to do it.

Prior Art Literature Information

Document 1 Application 10-2004-0026308 (Publication 10-2005-0101043)

Document 2 Application 10-2003-0072412 (Publication 10-2005-0037017)

The present invention provides a standard for predicting and releasing alarms based on predicted water level information for real-time water level and rising and falling of bridges in order to minimize the safety of train operation and damage or damage of facilities from flooding due to typhoon and heavy rain. The purpose is to establish this.

In order to achieve the above object, in the present invention, a water gauge and a CCTV camera are installed in each railway bridge, and the alarm level is based on the clearance of each bridge.

The standard was set and the real-time monitoring at each bridge jurisdiction and storage on DVR were made possible. In addition, by establishing an integrated control system in the integrated control center, real-time data and video data are received from the field monitoring system (jurisdiction), each bridge is not only integrated real-time monitoring but also the level rises. By analyzing the downward trend statistically, an algorithm is provided to provide the expected level information.

It synchronizes the water level data with the video and saves and builds a database, which can be used for information retrieval and alarm class standard supplementation.

According to the present invention, the efficiency and convenience of securing safety of all trams and trains and the bridge site monitoring are secured through real-time remote monitoring and prediction information on a plurality of bridge levels. In addition, each bridge alarm rating standard was established.

1 is a system configuration diagram of an embodiment of the present invention, although the railway bridge has been described as an embodiment, the present invention is not limited to the railway bridge. That is, it can be applied to bridges of general roads.

Referring to the drawings the specific content of the present invention will be described.

The field measurement system 1 installed in each bridge is composed of a CCTV camera 11, a water level meter 12, a field controller 13, and a signal conversion transmitter 14.

The CCTV camera 11 is a 1/2 inch, 410,000 pixel class high performance CCD camera. Observation is possible in ultra low light of 0.0001 LUX for night monitoring. Although not specified in the drawing, it is equipped with pan tilt control and 21 times high magnification zoom function, so that not only visual observation of the water level but also the possibility of damage or collapse of the bridge can be observed in detail from a remote location. Control of the pan tilt and zoom lens is controlled through the field controller 13, and since a general industry standard protocol is used, detailed description thereof will be omitted. The water level gauge 12 measures the distance from the transmitter to the surface from the time required for transmitting the sound wave toward the surface and receiving the reflected sound wave reflected from the surface. The measuring range can be measured up to 150m with an error of +/- 10mm. The signal conversion transmitter 14 is a device for transmitting the water level data and the video signal measured by the bridge to the place where the field monitoring system 2 is installed. In the present invention, the site monitoring system 2 is installed in the jurisdiction communication room of the bridge. Because bridges and jurisdictions can range from a few kilometers, optical cables are suitable for transmitting these distances without distortion and attenuation of the signal. Therefore, in the present invention, an optical link is used. Since the optical link is a general commercial product, detailed description thereof will be omitted.

The above-mentioned field monitoring system (2) monitors bridges in the jurisdiction of the bridges, and transmits water level data and video information to the integrated control system (3) in real time for integrated control of each bridge. 21, the DVR 22, the monitor 22, the TV 23, and the communication network connection unit 25. In the case of jurisdiction of multiple bridges, the system can be expanded by adding a signal conversion receiver 21. The DVR 22 can additionally connect up to four or eight signal conversion receivers 21.

The signal conversion receiver 21 is an apparatus for receiving information from the signal conversion transmitter 13 of the field measurement system 1, and in the present invention, an optical link is used similarly to the signal conversion transmitter 13.

The DVR 22 displays or stores the water level data and the video signal of the bridge received through the signal conversion receiver 21 on the monitor 23 which is a display device. It also functions to transmit to the integrated control system 3 through the communication network connection 25. As the display device, the TV 24 can be connected to the monitor 23. This provides a function that can only monitor the video without the control of the DVR (22) in the office other than the field monitoring room. Although the communication network connection unit 25 transmits to the integrated control system through the E1 class dedicated line in the embodiment of the present invention, it is also possible to transmit through the general Internet. In the embodiment of the present invention, the field monitoring system is constructed in five stations.

The integrated control system 3 is composed of a communication network connection unit 31, an integrated control system 32 and a monitor 34, a video surveillance system 33 and a monitor 35, and a DB server 36, each connected by Ethernet. It is.

The communication network connection part 31 is an apparatus for communication connection with the field monitoring system 2 installed in each station, and in the present invention, it is an apparatus for connecting an E1 dedicated line.

The integrated control system 31 is a device for integrated monitoring and control of the water level data and video signals transmitted in real time through the field monitoring system 2 of the respective jurisdiction in the field measuring system 1 of each bridge. Integrated control software with graded alarm trigger, predictive alert, data storage and retrieval. The main functions of the integrated control software are as follows.

First, it provides information that arranges the situation of the entire bridge in order of risk and selects bridges by region of interest. An example thereof is shown in Table 1 below.

observatory River Jurisdiction Jurisdiction Bridge height (m) Water level (m) Slack (m) Alarm matter Hayucheon Railway Bridge Bridge Seryu Station Suwon Branch 2.43 1.88 0.55 danger Rhubarb bridge Woncheon-richeon Seryu Station Suwon Branch 4.92 4.13 0.79 danger Mokcheon Railway Jisancheon Songtan Station Suwon Branch 2.08 1.23 0.85 boundary Gwangcheon Railway Jangancheon Paper station Suwon Branch 3.00 2.05 0.95 caution Icheon Railway Doilcheon Paper station Suwon Branch 4.94 3.79 1.15 caution Tongbok Richeon Railway Bridge Tongbok Richeon Pyeongtaek Station Suwon Branch 4.08 2.25 1.83 - Anseongcheon Railway Bridge Anseongcheon Seonghwan Station Cheonan Branch 5.98 3.44 2.54 - Seonghwancheon First Iron Bridge Seonghwancheon Seonghwan Station Cheonan Branch 5.78 2.57 3.21 - Seonghwancheon Second Railway Seonghwancheon Seonghwan Station Cheonan Branch 4.25 0.38 3.87 -

For the user's convenience and visual effect, in addition to the table form as described above, it also has a function to animate the water level, clearance, and alarm level on the cross section of the bridge.

In the present invention, in order to establish the criteria of the alarm class classification in the above was defined as follows.

Water level: the height from the zero point of the water gauge to the water surface

Clearance: Height from the water surface to the top of the bridge pier.

Danger: situations where the water level exceeds the design margin of the basic design of each bridge

Boundary: Situations exceeding 1.5 times the risk threshold

Caution: Situations in excess of twice the risk threshold

The alarm class standards for each bridge are shown in Table 2 below.

observatory River Jurisdiction Jurisdiction Bridge height (m) Caution (m) Boundary (m) Risk (m) Hayucheon Railway Bridge Bridge Seryu Station Suwon Branch 2.43 1.20 0.90 0.60 Rhubarb bridge Woncheon-richeon Seryu Station Suwon Branch 4.92 1.60 1.20 0.80 Mokcheon Railway Jisancheon Songtan Station Suwon Branch 2.08 1.20 0.90 0.60 Gwangcheon Railway Jangancheon Paper station Suwon Branch 3.00 1.20 0.90 0.60 Icheon Railway Doilcheon Paper station Suwon Branch 4.94 1.20 0.90 0.60 Tongbok Richeon Railway Bridge Tongbok Richeon Pyeongtaek Station Suwon Branch 4.08 1.60 1.20 0.80 Anseongcheon Railway Bridge Anseongcheon Seonghwan Station Cheonan Branch 5.98 2.40 1.80 1.20 Seonghwancheon First Iron Bridge Seonghwancheon Seonghwan Station Cheonan Branch 5.78 1.60 1.20 0.80 Seonghwancheon Second Railway Seonghwancheon Seonghwan Station Cheonan Branch 4.25 1.60 1.20 0.80

If you select a bridge of interest, you can monitor the status of the water level in various forms such as real-time video, section animation, Excel graph, and numerical data. Predictive alerts can be used to calculate the expected level after 10 minutes or an hour, or the estimated time to arrive at the next level of alert. You can also analyze the stations that are within the reach of the bridge within the estimated time to reach the hazard level.

The following is an example of the water level prediction function.

Level increase rate (k) = (current level (WL_0)-level 10 minutes ago (WL_10)) / 10

Clearance High (WL_M) = Risk Standard Level (WL_D)-Current Level (WL_0)

Estimated time to reach risk level (t1) = clearance (WL_M) / rate of increase in level (k). (One)

You can analyze the bridge's traversable stations from the estimated time of risk level reached above and the rail business km database.

Distance (d) = (km base of Seoul station of interest)-(km base of Seoul bridge)

Transit time (t2) = distance (d) / train speed (s). (2)

However, the above equations are conceptual explanations, so be careful to match the units in the actual calculation.

In equation (1) and equation (2) above

The estimated time to reach danger level (t1) <time required to pass (t2) indicates that the train leaving the station of interest cannot cross the bridge.

Table 3 below is an example of an analysis of the passability zone when Anseong Cheonyo Bridge is expected to reach the risk level after 15 minutes. In the table, depending on the speed of the train, stations within the section marked with *** will not pass the Anseongcheon Railway Bridge within 15 minutes.

station Seoul branch (km) Distance (km) Time required to pass Anseongcheon Railway Bridge (Unit: minute) 60km / H 80km / H 120 km / H Disease 48.700 1.850 *** 29.73 *** 22.30 14.86 Sema 51.100 1.250 *** 27.33 *** 20.50 13.66 Osandae 53.800 2.700 *** 24.63 *** 18.47 12.31 Osan 56.500 2.700 *** 21.93 *** 16.45 10.96 Authenticity 60.500 0.630 *** 17.93 13.45 8.96 Songtan 64.300 0.850 14.13 10.60 7.06 Seo Jeong-ri 66.500 2.200 11.93 8.95 5.96 Paper 71.300 0.100 7.13 5.35 3.56 Pyeongtaek 75.000 0.529 3.43 2.57 1.71 Anseongcheon Railway Bridge 78.428 3.428 0.00 0.00 0.00 Sunghwan 84.400 0.814 5.97 4.48 2.99 Direct 89.800 5.400 11.37 8.53 5.69 vertex 93.600 2.000 *** 15.17 11.38 7.59 Cheonan 96.600 3.000 *** 18.17 13.63 9.09 Jeong Lee 107.400 0.900 *** 28.97 *** 21.73 14.49 ex 114.900 7.500 *** 36.47 *** 27.35 *** 18.24

The integrated control system 31 has various functions such as data analysis and report generation in the past as a storage and retrieval function in conjunction with the DB server 36 as well as providing real-time monitoring and prediction information. A detailed functional map of the integrated control software including the functions described above is shown in FIG.

In addition, the video surveillance system 33 displays real-time video of each bridge. According to user's setting, each bridge can be visually monitored by full screen sequential display or multi screen of 4 divisions, 9 divisions, 16 divisions and 25 divisions.

The communication server 37 controls the communication between the integrated control system or the field monitoring systems 2 and the integrated control system 3.

1 is a configuration diagram of an embodiment of the present invention.

Claims (7)

A field measuring means installed at a site such as a railroad bridge and including a water level meter for measuring the water level and a camera for visual monitoring of the video; On-site monitoring means including a DVR device capable of real-time display and storage of water level data and video from a plurality of above-mentioned on-site measuring means, and real-time transmission to an external communication network; Integrated control means including a real-time display and monitoring function of the water level data and video information transmitted in real time from a plurality of the above-described field monitoring means; In flood monitoring system of railway bridges, The tactical integrated control unit issues or releases an alarm for each level according to the level of danger, provides the predicted level information, and links the predicted level information with the railway business km database and the operating speed of the train to depart the station of interest. Includes a function to provide information whether the hazard alert can pass the bridge predicted within the estimated time of reaching the critical level. The method of claim 1, wherein the predicted water level information is obtained by a mathematical operation from a change trend of the real time water level data. The method according to claim 1, wherein when the integrated control means displays real-time water level data and moving picture information from the plurality of field measuring means, a plurality of bridges having a high probability of danger and flooding are arranged in order of risk. The method according to claim 1, wherein the monitoring means for real-time transmission of the video and the water level data in synchronization. The method according to claim 1, wherein the integrated control means includes a function for storing the synchronized real-time water level data and the video, and interlocked search of the water level data and the video. The method according to claim 1, wherein the highest hazard level criterion of the alarm class is based on the clearance of the bridge design. The method according to claim 1, wherein the next risk level criterion of the alarm class is a multiple of the high risk level margin.

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