KR20120029927A - Method and system for monitoring sewer drainage pipes using chloride ion concentrations - Google Patents

Abstract

PURPOSE: A sewer pipe monitoring method using chloride ion concentration and a monitoring system thereof are provided to monitor the sewer pipe on a real time basis, determine types of trespassing water, and calculate quantity of trespassing water on a real time basis. CONSTITUTION: A monitoring system of sewer pipe monitoring method using chloride ion concentration comprises the following steps: measuring flow rate and Cl ion concentration which pass a measuring point of a sewer pipe by using flow sensor and chlorine ion sensor(S1); storing the measured flow rate and Cl ion concentration of the sewage(S2); making a measured Cl ion concentration graph which shows change of the Cl ion concentration according to measuring time(S3) making a standard concentration graph which shows change of the saved Cl ion concentration in normal state according to time difference(S4), calculating total amount of the Cl ion concentration change in hours which escapes of the standard variation of the Cl ion concentration by comparing the 2 graphs(S5); dispatching alarm signal in case the variation of the Cl ion concentration exceeds the specified range of the standard graph(S7).

Description

METHOD AND SYSTEM FOR MONITORING SEWER DRAINAGE PIPES USING CHLORIDE ION CONCENTRATIONS}

The present invention relates to a sewage pipe monitoring method and a monitoring system therefor, and more particularly, to measure the flow rate and chlorine ion concentration of sewage passing through the same measuring point of the sewage pipe in real time, and to measure the chlorine ion concentration according to time. A graph of change in ion concentration (measurement of chlorine ion concentration) and a graph of change in time (standard chlorine ion concentration graph) of chlorine ion concentration measured before the damage to the sewage pipe, respectively, at the same measuring point. After the preparation, the measured chlorine ion concentration graph and the standard chlorine ion concentration graph are compared to monitor whether the measured chlorine ion concentration measured in real time is outside the set range of the past standard chlorine ion concentration.

Sewer pipe (下 水管 渠) is a large sewer pipe that collects sewage from various sewers and sends it down to the sewage treatment plant. Since sewer pipes are buried underground and are managed by manpower through manholes embedded at regular distances, it takes enormous cost and time to accurately understand the maintenance status and sewage flow of sewage pipes after construction.

 However, sewage pipes installed underground are defective pipes and connection failures, and groundwater and unknown water may flow into sewage treatment plants through sewer pipes. The main phenomena caused by the damage of sewage pipes are infiltration, inflow and leakage. Infiltration is the infiltration of groundwater or rainwater into the pipe through inadequate pipework, such as a hole in the sewage pipe, poor pipe joints, and poor connection to the connection pipe.Inflow is inferior to the seal of the manhole, rainwater drainage, roof gutter, The drainage of the basement is connected to the sewage pipe and rainwater flows in. In addition, the leakage of sewage pipes is discharged to the outside of the pipes through poor pipes, such as holes in the sewer pipes, poor pipe joints, and poor connection to the connection pipes.

In particular, when intrusion water and inflow water are generated, rainwater or groundwater is mixed in the sewage treatment plant to which only the sewage should be introduced, thereby causing an obstacle in the operation of the sewage treatment plant and excessively operating costs. In order to minimize these problems, sewage pipe maintenance and continuous maintenance are required, and as a premise for this, sewage pipe monitoring, which monitors whether an abnormality such as breakage occurs in the sewage pipe, is required.

In general, the sewage pipe monitoring method of the prior art, by analyzing the flow rate of sewage using a flow sensor to determine whether the intrusion and inflow or leakage occurs. However, the prior art is completely dependent on the detection signal of the flow sensor installed in the sewer pipe, it is difficult to obtain accurate analysis data due to the incorrect measurement value of the actual flow sensor. In addition, according to the wrong data, there was a problem that a visual survey, a CCTV survey or an acoustic survey should be carried out that do not require more manpower to be put on site.

For example, the flow sensor has a problem that it is not possible to accurately measure the flow rate and level because foreign matters such as soil and contaminants introduced by the sewage is attached or accumulated around the sensor. In addition, the flow rate and the water level signal measured due to the error of the sensor itself has a problem that fluctuates every moment.

Accordingly, in recent years, a monitoring method for measuring the quality of sewage in addition to the flow rate of sewage has been proposed. This method is calculated by using the total BOD and COD loads in the sewage pipe. The infiltration water quality is "0", the flow rate of the infiltration water is constant for 24 hours, and the water quality of the inflow water is constant under three assumptions. For example, the conventional 'average daily average, minimum flow-water quality assessment technique' measures daily flow rate and water quality (BOD, COD) at a specific point and uses the daily average, minimum daily flow rate (lowest night flow) and water quality data. It is a method of calculating the sewage generated at night, and the intrusion water.

However, there is a problem that BOD and COD in sewage pipes are not preferable as the tracer because they change due to the precipitation, flotation or natural purification of contaminants. In addition, the water quality of infiltration water such as rainwater is often not "0", the flow rate of infiltration water changes rapidly with time, and the water quality of the inflow sewage is also not constant, so there is a problem of low reliability. In addition, conventionally, the conductivity is used to measure the quality of the sewage. The conductivity sensor is sensitive to not only organic pollutants but also to other groundwater or other ionic substances (Mg, Ca, etc.) contained in rainwater. Could not accurately assess the water quality.

The present invention has been made to solve the problems of the prior art, the main object of the present invention is to measure the concentration of chlorine ion of sewage at the same measurement point of sewage pipe in real time and the measured chlorine ion concentration of sewage in the past at the same measurement point It provides a monitoring method to monitor the intrusion water generation compared to the standard chlorine ion concentration measured in. That is, when a sewage pipeline is newly installed or installed in the sewage treatment zone, the chlorine ion concentration of sewage generated in the sewage treatment zone is discharged in a certain pattern, so when the sewage pipeline is in a normal state, that is, measured in the past Based on the chlorine ion concentration in the sewage, a standard chlorine ion concentration graph is prepared, and the standard chlorine ion concentration graph is compared with the measured chlorine ion concentration graph measured in real time. To provide a way.

As a means for achieving the above object of the present invention, the sewage pipe monitoring method using the chlorine ion concentration according to the present invention,

A measuring step (S1) of measuring the flow rate of the sewage and the chlorine ion concentration passing through the same measuring point of the sewage pipe using the flow sensor and the chlorine ion sensor; A storage step (S2) of storing the flow rate of the sewage and the chlorine ion concentration measured in the measuring step (S1); A measurement concentration graph preparing step (S3) of preparing a 'measurement chlorine ion concentration graph' indicating a change in the chlorine ion concentration over time of the chlorine ion concentration measured in the measuring step (S1); A standard concentration graph preparing step (S4) of preparing a 'standard chlorine ion concentration graph' indicating a change in chlorine ion concentration over time of the past steady state chlorine ion concentration stored in the storage step (S2); During the time out of the range of the standard chlorine ion concentration by comparing the 'measured chlorine ion concentration graph' created in the measurement concentration graph preparing step (S3) and the 'standard chlorine ion concentration graph' prepared in the standard concentration graph preparing step (S4). Calculating a concentration variation amount (S5) for calculating a 'change amount of chlorine ion concentration', which is the total amount of chlorine ion concentration of the; It characterized in that it comprises an alarm generating step (S7) for transmitting an alarm signal when the amount of variation in the chlorine ion concentration calculated in the concentration variation calculation step (S5) exceeds a predetermined range.

In addition, the present invention, when the alarm signal is received from the alarm generation step (S7) based on the flow rate of the measured sewage stored in the storage step (S2) a 'measured flow graph' indicating the flow rate of the sewage over time Creating a measurement flow graph creating step (S8); A standard flow graph generation step (S9) of preparing a 'standard flow rate graph' representing a change in the flow rate of the sewage over time of the flow rate of the past steady state stored in the storage step (S2); Comparing the 'measured flow graph' created in the measurement flow graph preparation step (S8) and the 'standard flow graph' created in the standard flow graph preparation step (S9), 'the total flow rate of sewage for a time out of the standard flow rate range' A flow rate fluctuation calculating step (S10) for calculating a fluctuation amount of flow rate '; Leakage and intrusions for estimating the types of leakage and intrusion water and the intrusion water quantity based on the variation in the chlorine ion concentration calculated in the concentration variation calculation step (S5) and the variation in the sewage flow rate calculated in the flow variation calculation step (S10). Number analysis step (S11); It further comprises a warning generation step (S12) for sending a warning signal to the administrator when the amount of change of the intrusion water in the leak and intrusion water analysis step (S11) exceeds a predetermined range.

In the present invention, when an alarm signal is received from the alarm generating step (S12), the damaged sewage pipe search step of searching for the sewer pipe where the leak and intrusion water is generated by displaying the measuring point where the leak and intrusion water occurred in the sewer pipe network diagram Include.

If leaks and infiltrations are found through the damaged sewer pipe search step, the chlorine ion concentration of the sewage passing through the two measuring points of the sewer pipe is measured, and the two measuring points are narrowed according to the result. It further includes a damaged unit search step for finding the intrusion water generation position therebetween.

Another embodiment of the sewage pipe monitoring method using the chlorine ion concentration according to the present invention,

A measuring step (S1) of measuring the flow rate and chlorine ion concentration of the sewage flowing through the sewage pipe using a flow sensor and a chlorine ion sensor; Standard flow graphs and standard chlorine ion concentration graphs which store the measured sewage flow rate and chlorine ion concentration sequentially and show the average fluctuations in chlorine ion concentration over time based on past sewage flow rate and chlorine ion concentration. Creating a standard graph creating step (S4); Based on the measured chlorine ion concentration, a `` measured chlorine ion concentration graph '' showing the change in chlorine ion concentration over time is prepared and compared with the `` standard chlorine ion concentration graph '' corresponding to the `` measured chlorine ion concentration graph ''. A concentration variation calculation step (S5) of calculating a 'change amount of chlorine ion concentration', which is a total amount of chlorine ion concentration during a time out of the range of chlorine ion concentration; Based on the measured sewage flow, create a 'measured flow graph' that shows the variation in flow over time and compare it with the 'standard flow graph' corresponding to the 'measured flow graph'. A flow rate fluctuation calculating step (S9) for calculating a 'flow amount of sewage flow rate', which is the total flow rate of the flow rate; The leakage and intrusion water analysis step (S11) of calculating the type of infiltration water and the amount of leakage or the amount of intrusion water on the basis of the variation in the chlorine ion concentration and the variation in the sewage flow rate is characterized in that it is made.

In the present embodiment, the standard graph preparation step (S4), the data storage step of sequentially storing the data of the measured sewage flow rate and chlorine ion concentration; Prepare and save 'standard flow graph' and 'standard chlorine ion concentration graph' which show the fluctuations of sewage flow and chlorine ion concentration over time based on the sewage flow rate and chlorine ion concentration in the past before the sewer pipe is damaged. Graph storage step.

 The concentration variation calculation step (S5), a measurement concentration graph preparing step of preparing a 'measurement chlorine ion concentration graph' indicating a change in chlorine ion concentration over time based on the measured chlorine ion concentration; A concentration comparison step of comparing the prepared 'measured chlorine ion concentration graph' with a corresponding 'standard chlorine ion concentration graph'; When the measured chlorine ion concentration graph and the standard chlorine ion concentration graph are compared, the alarm signal when the total amount of chlorine ion concentration during the time out of the range of the standard chlorine ion concentration exceeds the preset range It includes an alarm to generate.

The flow rate calculation step (S9), the measurement flow graph generation step of creating a 'measurement flow rate graph' representing the variation of the sewage flow rate over time based on the measured sewage flow rate; It includes a flow comparison step of comparing the 'measured flow graph' and the corresponding 'standard flow graph'.

The concentration fluctuation calculation step and the flow rate fluctuation calculation step may include measurement time, measurement location information, and day of the week for measuring the 'chlorine ion concentration graph' and the 'standard flow rate graph' and 'standard flow graph' corresponding to the 'measurement chlorine ion concentration graph' and 'measurement flow graph'. It further includes a standard graph search step for searching using the search conditions, such as weather.

The concentration fluctuation calculation step and the flow fluctuation calculation step are performed in order to compare the searched 'standard chlorine ion concentration graph' and 'standard flow graph' with 'measured chlorine ion concentration graph' and 'measured flow graph'. It further includes a standard graph alignment step of moving the standard flow graph in the time axis direction to form a pattern that is as close as possible to the 'measured chlorine ion concentration graph' and the 'measured flow graph'.

In addition, the sewage pipe monitoring system for performing the sewage pipe monitoring method using the chlorine ion concentration according to the present invention,

A flow sensor installed in the sewage pipe and measuring a flow rate of sewage passing through the sewage pipe; A chlorine ion concentration sensor installed at the same position of the sewage pipe in which the flow sensor is installed to measure the chlorine ion concentration of the sewage passing through the sewage pipe; Based on the chlorine ion concentration and the flow rate data measured by the flow sensor and the chlorine ion concentration sensor, a graph of standard chlorine ion concentration is prepared based on the chlorine ion concentration measured for a certain period of time before an abnormality occurs in the sewage pipe in the past. Based on the measured chlorine ion concentration, a measured chlorine ion concentration graph is prepared, and the measured chlorine ion concentration graph is compared with the standard chlorine ion concentration graph to analyze how the measured chlorine ion concentration deviates from the standard chlorine ion concentration, If the measured chlorine ion concentration is outside the set range of the standard chlorine ion concentration, the total amount of chlorine ion concentration during the period outside the set range is obtained to calculate the change amount of the chlorine ion concentration, and the change amount of the chlorine ion concentration exceeds the set change amount. In the past, if there is a problem Create a standard flow graph on the basis of the determined flow rate, create a flow chart on the basis of the flow rate measured in real time, compare them, and then compare them with the total amount of sewage during the period when the measured chlorine ion concentration is outside the set range of the standard chlorine ion concentration. That is, the amount of change of the flow rate is calculated, the type of infiltration water, the leakage and the amount of intrusion water are calculated based on the change amount of the chlorine ion concentration and the change amount of the flow rate, and a warning signal is generated in which the inflow water exceeds a predetermined range. This includes the monitoring server.

In the present invention, the monitoring server receives the flow rate and chlorine ion concentration, measurement time information and measurement position information from the flow rate sensor and the chlorine ion concentration sensor installed in the sewage pipe, and stores the received flow rate and chlorine ion concentration data in the database A receiving module; Create 'measured chlorine ion concentration graph' and 'measured flow graph' at various time intervals using the flow rate, chlorine ion concentration, measurement time and location information received in real time, and the flow rate and chlorine ion of the past period stored in the database Using the concentration, measurement time, and location information, a 'standard chlorine ion concentration graph' and a 'standard flow graph' are prepared and compared, and the amount of variation in the chlorine ion concentration and the flow rate are calculated, and the chlorine ion concentration variation and the flow rate are compared. A central control server that calculates a variation of the intrusion water based on the variation and sends a warning signal when the variation exceeds the reference range; Operator computer that receives sewage pipe network basic information including sewage pipe diameter, distance or manhole location and rainfall snowfall history information from user, and outputs flow rate, chlorine ion concentration intrusion quantity and various graphs according to user's request It is made, including.

In the present invention, the receiving module, the position information of the flow rate and the chlorine ion concentration received through the network connection and the communication network connection unit for receiving information about the flow rate and the chlorine ion concentration measured through the network and the measurement location And a data collection server which classifies and stores the data according to the measurement time information.

The central control server is a graph preparation unit for creating a sewage measurement flow graph and a measured chlorine ion concentration graph or a standard flow graph and a standard chlorine ion concentration graph using the received flow rate and chlorine ion concentration, and the 'measured chlorine ion concentration Calculate the fluctuation of the chlorine ion concentration by comparing the graph and the standard chlorine ion concentration graph, and compare the measured flow graph and the standard flow graph to calculate the fluctuation of the sewage flow rate. Based on the flow rate fluctuations, the intrusion water and the intrusion water amount are calculated, and if the intrusion water exceeds a certain range, an analysis unit for generating a warning signal, and the fluctuation amount of the chlorine ion concentration and the inflow water fluctuation amount may exceed a certain range. It is configured to include an alarm unit for generating an alarm signal in the case.

The central control server searches the flow rate and the chlorine ion concentration stored in the database according to the location information and the measurement time, or the location information and the measurement time or the day or weather information of the standard graph stored in the standard graph storage unit. It further includes a search unit for searching by using.

The central control server, the graph alignment to adjust the position of the standard graph so that the standard graph is most closely arranged to the measurement graph when comparing the standard chlorine ion concentration graph, the measured chlorine ion concentration graph and the standard flow graph and the measured flow graph Includes more wealth.

And a first fuzzy inference step of generating a fuzzy value according to a stored fuzzy rule for recognizing a pattern of the measured graph by using the recognized quantity of the measured graph as the input signal and the recognized standard graph. A second fuzzy inference step of generating a fuzzy value according to a stored fuzzy rule in order to recognize a pattern of a standard graph by using a feature amount of as an input signal, and inputting fuzzy values generated in the first and second inference steps, respectively; It consists of a fuzzy inference system composed of a third fuzzy inference step of generating a fuzzy value according to a stored fuzzy rule to recognize a difference between a standard graph pattern and a measured graph pattern as a signal.

The sewage pipe monitoring method using the chlorine ion concentration of the present invention monitors the concentration of chlorine ion contained in the sewage instead of directly monitoring the flow rate of the sewage so that it can monitor the occurrence of sewage pipe abnormalities in real time, and intruded water. Not only can determine the type of intrusion can be calculated in real time, and the leakage and intrusion water is generated in combination, there is an effect that can detect whether the sewage is abnormal even if there is no change in the flow rate.

In addition, the present invention prepares a measurement graph using the flow rate and chlorine ion concentration of the sewage measured at the same measuring point of the sewage pipe, and after making a standard graph using the past flow rate and chlorine ion concentration measured at the same measuring point By comparing the measurement graph with the standard graph, the total amount of chlorine ion concentration and the amount of chlorine ion concentration for a certain time is out of the standard chlorine ion concentration and the standard chlorine ion concentration to monitor the possibility of abnormality of sewage pipe, Only when there is a possibility of occurrence is it possible to significantly reduce the load on the monitoring system by estimating the fluctuations of the sewage and the amount of infiltration.

In addition, the present invention can easily determine whether infiltration water occurs between the two measurement points by measuring the chlorine ion concentration at the two measurement points of the sewage pipe and comparing the chlorine concentration graph of the two measurement points to check whether the chlorine ion concentration is out of a certain range. Therefore, it is possible to omit costly survey such as visual survey, CCTV survey or acoustic survey.

Figure 1a is a graph showing the variation of the sewage flow rate measured at the same measuring point of the sewage pipe,
1b is a graph showing fluctuations in chlorine ion concentration in sewage measured at the same measurement point of sewage pipe;
Figure 2a is a view showing an example of a standard chloride ion concentration graph,
Figure 2b is a view showing an example of the measured chlorine ion concentration graph,
Figure 2c is a diagram comparing the standard chlorine ion concentration graph and the measured chlorine ion concentration graph,
3 is a diagram comparing a standard flow rate graph with a measured flow rate graph,
4 is a graph showing the flow rate of the infiltration water;
5 is a view showing an example of a sewage pipe monitoring method using a chlorine ion concentration according to the present invention,
6 is a view showing another embodiment of the sewage pipe monitoring method using the chlorine ion concentration according to the present invention,
7 is a view showing a schematic configuration of the sewage pipe monitoring system according to the present invention,
8 is a block diagram showing a structure of a field control panel according to the present invention;
9 is a block diagram showing the configuration of the sewage pipe monitoring system according to the present invention,
10 is an explanatory diagram showing a fuzzy inference system for standard graph alignment;
11 is a diagram showing a graph of chloride ion concentration at various time intervals,
12 is a sewer pipe network for explaining a damaged sewer pipe search method according to the present invention,
13 is a view of a sewer pipe for explaining a damaged part search method according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail for the sewage pipe monitoring method using a chlorine ion concentration according to the present invention and a monitoring system for this.

First, FIG. 1A is a graph showing fluctuations in the sewage flow rate measured at the same measurement point of sewage pipe, and FIG. 1B is a graph showing fluctuations in chlorine ion concentration of sewage measured at the same measurement point of sewage pipe. The X axis shows time, and the Y axis shows sewage flow rate and chlorine ion concentration.

As shown, the flow graph of the sewage shown in FIG. 1A shows that the flow rate varies greatly at every measurement time, while the chlorine ion concentration of the sewage shown in FIG. 1B is kept relatively constant. That is, the sewage pipe is a place where several sewage discharged from each household flows, and the flow rate of the sewage (㎥ / sec) changes from time to time depending on the amount of sewage discharged from the home. On the other hand, the chlorine ion concentration (mg / l) of sewage is relatively constant because the sewage discharged from each household always shows the average chlorine ion concentration. In addition, the flow rate of the sewage can not distinguish what kind of water is introduced into the sewage pipe, but the change in chlorine ion concentration has the advantage of distinguishing whether the water flowing into the sewage pipe is sewage or natural or high concentration organic wastewater. Therefore, the chlorine ion concentration in sewage is very useful as an indicator to monitor sewage pipe.

That is, sewage and manure discharged from homes and buildings contain significant amounts of chlorine ions. On the other hand, natural waters such as groundwater and rainwater contain little chlorine ions (Cl ⁻ ). In other words, tap water (natural water) supplied to homes contains almost no chlorine ions, but since a large amount of salt is used in human life, sewage discharged from homes contains a significant amount of chlorine ions. Therefore, the flow rate of sewage and the concentration of chlorine ion at a measuring point in the sewage pipe for a certain period of time can be measured and the change in the flow rate of the sewage and the concentration of chlorine ion over time can be plotted.

On the other hand, the flow rate and chlorine ion concentration of the sewage measured at one measuring point of the sewage pipe fluctuate in a constant pattern with the change of time. The reason why the sewage flow rate and the chlorine ion concentration have a constant pattern is because, first, there is no population change in a certain sewage treatment area, and the living patterns and dietary cultures of people living in the treatment area are similar. This is because the normal sewage pipes without cracks in the open hole flow only in the sewage discharged from each home and no unknown water flows from the outside, or internal sewage does not leak to the outside. As such, if the sewer line is in a steady state and the living patterns and dietary cultures of people living in the sewage treatment area are similar, the sewage flow rate and the chlorine ion concentration in the sewer line are equal because the flow rate of sewage discharged at the same time and the amount of chlorine ions are the same. Will have a constant pattern.

For example, the sewage discharged before and after meal time is a large amount of sewage containing salt, such as washing dishes, so the flow rate of the sewage is high and the chlorine ion concentration is high. In addition, the daytime zone has a higher sewage flow rate and higher chlorine ion concentration than the nighttime zone. In addition, on Sundays and public holidays, the number of people living at home increases, so the flow rate of sewage discharged from the home increases and the chlorine ion concentration increases, while the sewage discharged from the city decreases and the chlorine ion concentration decreases. In addition, the sewage chlorine ion concentration increases or decreases the sewage flow rate and increases or decreases the chlorine ion concentration according to weather changes such as temperature and rainfall. Therefore, the sewage flow rate and chlorine ion concentration change patterns have different patterns depending on the living patterns of each sewage treatment zone or the weather of the treatment zone.

Figure 2a shows the pattern of chlorine ion concentration measured in the state that no natural water or rainwater or high concentration of organic wastewater from the outside or no sewage in the pipe leaks due to no damage or loss in the sewage pipe. Thus, the chlorine ion concentration graph prepared in the steady state sewer pipe is called 'standard chlorine ion concentration graph'. The dashed lines at the top and bottom of the standard chloride ion concentration graph show the set range (Cmax-Cmin) of the standard chloride ion concentration. Therefore, chlorine ion concentration variations within this set range are allowed or ignored.

Figure 2b is a graph showing the variation in the chlorine ion concentration measured in real time the flow rate of the sewage and chlorine ion concentration at the same measurement point of the sewer pipe. This chlorine ion concentration graph is measured in real time in the sewage pipe that is damaged or suspected of being damaged. In general, measured chlorine ion concentration graphs are useful if they are drawn from sewer lines where a 'standard chlorine ion concentration graph' has already been prepared. That is, comparing the measured chlorine ion concentration graph with the standard chlorine ion concentration graph, it is easy to check whether the sewer pipe is broken or lost.

Figure 2c shows an example of a graph comparing the measured chlorine ion concentration graph and the standard chlorine ion concentration graph. As shown in the figure, when damage occurs to the sewer line and inflow water or high concentration organic wastewater (unknown water) flows from the outside, the measured chlorine ion concentration graph and the standard chlorine ion concentration graph measured in real time are mutually different. Represent another pattern. At this time, if the chlorine ion concentration graph measured in real time exceeds the setting range (Cmax-Cmin) of the standard chlorine ion concentration graph, it means that unknown water is introduced into the sewer pipe upstream of the measurement point. In other words, if the difference between the setting range of the measured chlorine ion concentration graph and the standard chlorine ion concentration graph is obtained, the difference (a) of the chlorine ion concentration can be obtained, and the two intersection points of the measured chlorine ion concentration graph and the standard chlorine ion concentration graph (t) _When the sum (b) of chlorine ion concentration between _{0 and} tm) is obtained, the variation amount (b) of chlorine ion concentration for a predetermined time (t ₀ -tm) can be obtained. This chlorine ion concentration fluctuation amount (b) represents increased chlorine ions or reduced chlorine ions compared to the steady state sewer pipe.

In addition, referring to FIG. 3, when the measured flow rate graph is compared with the standard flow rate graph, the flow rate difference (c) of the sewage flowing through the normal sewage pipe and the damaged sewage pipe can be obtained and the flow rate for a predetermined time (t _{0 ,} tm) The amount of change d can be found.

In addition, as shown in Figure 4, using the measured chlorine ion concentration graph, the measured flow rate graph, the standard chlorine ion concentration graph and the standard flow rate graph to create a standard infiltration water graph and a measured infiltration water graph, The difference e of the infiltration water can be obtained, and the variation amount f of the intrusion water for a predetermined time (t _{0 ,} tm) can also be obtained.

As such, the sewage pipe monitoring method according to the present invention, first, by comparing the sewage chlorine ion concentration graph measured in real time with no damage to the sewage pipe and the chlorine ion concentration graph of sewage measured in real time sewage chlorine ion It monitors how far the concentration is from the standard chlorine ion concentration graph, and generates a warning signal when the difference between the chlorine ion concentration (a) and the variation in the chlorine ion concentration (b) exceeds the preset range. Second, when a warning signal is generated, the difference in flow rate (c) and the amount of change in sewage flow rate (d) for a predetermined period are analyzed by comparing the standard flow rate graph with the measured flow rate graph, and then the change amount of the chlorine ion concentration (b). The inflow water flow rate graph is generated using the variation amount d of the excess flow rate to obtain the variation amount f of the intrusion water, or the type of infiltration water and the amount of infiltration water are calculated.

That is, the conventional sewage pipe monitoring method is a method of directly monitoring the flow rate of sewage. However, since the flow rate of sewage fluctuates every measurement time, it is not possible to monitor the sewage pipe abnormalities in real time, and because it does not distinguish between sewage and natural water or high concentration organic wastewater, there is a limitation that it is impossible to grasp the intrusion quantity in real time. However, the sewage pipe monitoring method of the present invention can monitor the sewage pipe in real time because it monitors the chlorine ion concentration which hardly monitors the flow rate of sewage but changes little with time. In addition, since the flow rate of sewage is analyzed only when a warning signal occurs, the load of the monitoring system can be minimized.

Figure 5 is a schematic diagram showing a monitoring system for the sewage pipe monitoring method using a chloride ion concentration according to the present invention. As shown, the chlorine ion concentration measured by the flow sensor 10 and the chlorine ion concentration sensor 20, and the flow sensor 20 and chlorine ion concentration sensor 20 installed at the same measurement point of the sewage pipe 110 Based on the flow rate data and the flow rate data, a 'chlorine ion concentration graph' and a 'measured flow graph' are prepared and compared with the 'standard chloride ion concentration graph' and 'standard flow graph', and the measured chloride ion concentration is measured in real time. Monitor if it exceeds the setting range of chlorine ion concentration, and if it exceeds the preset range (Cmax-Cmin), the first warning signal is generated, and if the first warning signal occurs, the measured chlorine ion concentration graph and Comparing the standard chlorine ion concentration graph, the amount of variation in the chlorine ion concentration for a certain time period, i.e., during the time when the measured chlorine ion concentration exceeds the preset range (Cmax-Cmin), is calculated. It is determined whether the variation in the SOI concentration has been exceeded, and if it exceeds the range, a second warning signal is generated.If a second warning signal occurs, the measured flow graph and the standard flow graph are compared for a predetermined time. That is, the fluctuation amount of the sewage flow rate during the time when the measured chlorine ion concentration exceeds the preset range (Cmax-Cmin) is calculated, and the type of infiltration water and the inflow water type are based on the fluctuation amount of the chlorine ion concentration and the fluctuation amount of the sewage flow rate. It is made to include a monitoring server 30 to determine the leak, calculate the intrusion quantity, and if the calculated intrusion quantity exceeds the preset intrusion quantity to generate an alarm signal to the administrator.

6 shows an embodiment of a sewage pipe monitoring method using a chlorine ion concentration according to the present invention. As shown, the sewage pipe monitoring method using the chlorine ion concentration of the present invention, the flow rate of the sewage and chlorine flowing through the same measuring point of the sewage pipe 110 by using the flow sensor 10 and the chlorine ion concentration sensor 20 largely Measuring step (S1) for measuring the ion concentration,

A storage step (S2) of sequentially storing the flow rate of the sewage and the chlorine ion concentration measured in the measuring step (S1) in a storage device of the monitoring server 30;

A measurement concentration graph preparation step (S3) of preparing a 'measurement chlorine ion concentration graph' indicating the chlorine ion concentration measured in the measuring step (S1) as a change in the chlorine ion concentration with time;

And a standard concentration graph preparing step (S4) of preparing a 'standard chlorine ion concentration graph' indicating the chlorine ion concentration of the past steady state stored in the storage step (S2) as a change in the chlorine ion concentration over time.

Subsequently, the measured chlorine ion concentration graph prepared in the measurement concentration graph preparation step (S3) and the 'standard chlorine ion concentration graph' prepared in the standard concentration graph preparation step (S4) are compared, and the measured chlorine ion concentration is compared to the standard chlorine ion. The method further includes a concentration variation calculation step (S5) of monitoring whether the concentration is out of the set range, and calculating the amount of variation in the chlorine ion concentration varied during the period.

And a comparison step (S6) of comparing the fluctuation amount of the chlorine ion concentration calculated in the concentration fluctuation calculation step (S5) with a value exceeding a set range and a warning generating step (S6) of generating a warning signal when the predetermined range is exceeded. Is made of.

In addition, the present invention, when the warning signal occurs in the warning step (S7) of the sewage over time based on the flow rate of the measured sewage stored in the storage step (S2) or the flow rate of the sewage measured in the measuring step Measurement flow graph preparation step (S8) for creating a 'measurement flow graph' representing the flow rate change, and the 'standard flow rate graph showing the fluctuation of the flow rate of the sewage over time in the past steady state sewage flow rate stored in the storage step (S2) Includes a standard flow graph creation step (S9) of writing ','

Then, the flow rate of the sewage flow and the change of the sewage flow rate for a predetermined time are compared by comparing the 'measured flow graph' created in the measurement flow graph preparation step (S8) with the 'standard flow graph' created in the standard flow graph preparation step (S9). It includes the step of calculating the flow rate variation to be calculated (S10).

In addition, the present invention, the leakage of calculating the type of infiltration water and the amount of infiltration water based on the chlorine ion concentration fluctuation amount calculated in the concentration fluctuation calculation step (S5) and the flow rate fluctuation amount calculated in the flow rate fluctuation calculation step (S10). And an incidence analysis step (S11), and an alarm generation step (S12) for sending an alarm signal to an administrator when the amount of change of the infiltration water calculated in the leak and intrusion water analysis step (S11) exceeds a predetermined range. It is done by

As described above, the present invention observes the variation in the chlorine ion concentration using the 'standard chlorine ion concentration graph' and the 'measured chlorine ion concentration graph', and the 'standard flow rate graph only when the variation in the chlorine ion concentration exceeds a predetermined range. By using the 'and' measured flow graphs' to calculate the fluctuations of the sewage and the intrusion water, it is possible to reduce the load on the system by minimizing the process of analyzing the flow and the inflow water.

And, Figure 7 shows another embodiment of the sewage pipe monitoring method using the chlorine ion concentration of the present invention. As shown, the sewage pipe monitoring method of the present invention, measuring step (S1), measurement concentration graph preparation step (S3), standard graph preparation step (S4), concentration fluctuation calculation step (S5), concentration fluctuation comparison step (S6) ), Flow rate calculation step (S10), leak and intrusion water analysis step (S11) and standard graph search step (S13) is made.

The measuring step (S1) is a step of measuring the flow rate and chlorine ion concentration of the sewage flowing through the same measuring point of the sewage pipe 110 using the flow sensor 10 and the chlorine ion concentration sensor 20.

The measurement concentration graph preparing step (S3), the step of creating and displaying a 'measured chlorine ion concentration graph' indicating the change in chlorine ion concentration with time on the monitoring server 30 based on the chlorine ion concentration measured in real time to be.

The standard graph preparation step (S4), the stored standard flow rate of the sewage and chlorine ion concentration is sequentially stored and 'standard' representing the change in chlorine ion concentration over time based on the flow rate and chlorine ion concentration of the past steady state This step is to create and save 'flow graph' and 'standard chloride ion concentration graph'. To this end, the standard graph preparation step (S4) is a data storage step for storing data of the flow rate and chlorine ion concentration of the sewage measured in the measurement step (S1), and various standards created based on the steady-state data from the stored data It includes a standard graph storage step for saving a graph.

In general, when a sewage pipeline is newly established in a certain sewage treatment area or is operating normally through repair, the sewage flow rate and chlorine ion concentration through the sewage pipeline show a certain standard pattern. However, when such a standard pattern is plotted over time, different patterns are displayed according to time intervals such as minutes, hours, days, weeks, and months (see FIG. 11). The set range of numbers also changes. For example, if the time interval is narrow, the setting range becomes relatively wide, and if the time interval is wide, the setting range becomes relatively narrow. Therefore, in order to accurately monitor the condition of the sewage pipe, the standard graph preparation step S4 creates and stores various types of standard graphs at various time intervals and sets an allowable range suitable for each time interval.

In particular, the setting range of intrusion water or leakage is selected in consideration of economics. Due to the nature of sewage pipes buried underground, it is economical to allow intrusion or leakage within a certain range. If the amount of infiltration or leakage is relatively small, the adverse effect on the sewage treatment plant is small, but the cost of replacing or repairing the sewage pipe is high. Accordingly, when the amount of change in the chlorine ion concentration does not exceed a preset range, the warning signal may be set not to occur. This setting range is determined by the expert in advance in consideration of the characteristics of the sewer pipe.

In the step of calculating the concentration variation (S5), a chlorine ion is compared by comparing a 'measured chlorine ion concentration graph' and a 'standard chlorine ion concentration graph' corresponding to the 'measured chlorine ion concentration graph' based on the measured chlorine ion concentration. Calculate the difference in concentration and the variation in chlorine ion concentration. To this end, the concentration variation calculation step (S5), a standard for searching the 'standard chlorine ion concentration graph' created in the standard graph preparation step (S4) in order to bring up the standard graph corresponding to the 'measured chlorine ion concentration graph' A graph search step (S13), a standard graph sorting step for sorting the searched 'standard chlorine ion concentration graph' with a 'measured chlorine ion concentration graph', and a 'standard chlorine ion concentration graph' for the 'measured chlorine ion concentration graph' 'Concentration graph analysis step to calculate the amount of change in the chloride ion concentration by comparing the'.

Subsequently, the concentration variation comparison step (S6) generates a warning signal when the amount of variation in the chlorine ion concentration exceeds a predetermined range as a result of comparing the 'measured chlorine ion concentration graph' with the 'standard chlorine ion concentration graph'.

The flow rate variation calculation step S10 corresponds to a 'measurement flow graph' that is generated by creating a 'measurement flow graph' based on the measured sewage flow rate when a warning signal occurs in the concentration fluctuation comparison step S6. Calculate the amount of change in sewage flow by searching the 'standard flow graph'. To this end, the flow rate calculation step (S10) is a standard graph search step (S13) for searching the 'standard flow graph' created in the standard graph preparation step (S4) in order to bring up the standard graph corresponding to the 'measured flow graph' ), A standard graph sorting step of sorting the searched 'standard flow graph' to compare with the 'measured flow graph', and a flow graph analysis step of calculating the flow rate variation by comparing the 'standard flow graph' with the 'measured flow graph' It includes.

In this case, the standard graph search step (S13) may be searched using various search conditions such as the day of the week and the weather as well as the measurement time and measurement position information of the measurement graph created in real time. For example, if the weather changes while measuring flow rate and chlorine concentration in real time, a new standard graph is retrieved and retrieved according to the changed weather.

The standard graph sorting step compares the searched 'standard graph' and the 'measurement graph' created in real time to each other, but when the patterns of the two graphs are similar to each other but a time difference occurs, there is a phase difference between the two patterns. Move the standard graph in the time axis direction so that the standard graph and the measurement graph are accurately compared to match the 'standard graph' and 'measure graph'. In other words, the phases of the standard graph and the measured graph must coincide to accurately calculate the variation amount. The standard graph alignment step may be implemented by a fuzzy inference system.

The leakage and infiltration water analyzing step (S11) is a type of infiltration water based on the variation in the chlorine ion concentration variation calculated in the concentration variation calculation step (S5) and the variation in the flow rate calculated in the flow rate variation calculation step (S10). And estimating leaks and intrusions.

For example, in the step of calculating the concentration variation (S5), the standard chlorine ion concentration graph is compared with the measured chlorine ion concentration graph, and the amount of variation in the chlorine ion concentration for a predetermined time is calculated. The amount of change in chlorine ion concentration may be largely positive or negative. In addition, in the flow rate fluctuation calculation step (S10), the standard flow rate graph and the measured flow rate graph are compared, and the fluctuation amount of the sewage flow rate for a predetermined time is calculated. The fluctuation amount of the flow rate may also have a positive value or a negative value. Therefore, it is possible to determine the type of intrusion water flowing into the sewage pipe by using the increase and decrease of the chlorine ion concentration fluctuation amount and the flow rate fluctuation amount.

In other words, if the variation in chlorine ion concentration is negative and the variation in sewage flow rate is positive, infiltration water close to natural water flows into the pipe. In case of positive value and fluctuation amount of sewage flow rate is positive value, high concentration of organic wastewater is introduced into the pipe, and fluctuation amount of chlorine ion concentration has negative value. However, if the fluctuation amount of the sewage flow rate also has a positive value, infiltration water close to natural water flows into the pipe and water leakage occurs, while the fluctuation amount of chlorine ion concentration has a positive value and If the variation is negative, high concentrations of organic wastewater flow into the pipe and leakage occurs. Here, high concentration organic wastewater refers to livestock waste or industrial wastewater with higher chlorine ion concentration than general sewage.

In addition, in the leak and intrusion water analysis step (S11), it is possible to calculate the leakage and intrusion water amount. For example, the leakage can be directly calculated by comparing the standard flow graph and the measured flow graph, but the intrusion water quantity cannot be calculated directly using the standard flow graph and the measured flow graph, but is calculated using the chlorine ion substance formula.

That is, at one measurement point of the sewer pipe before the sewer pipe is damaged, the flow rate measured at an arbitrary measurement time t is referred to as the standard flow rate "Qs", and the chlorine ion concentration measured at the same measurement time is the standard chlorine ion concentration. Referred to as "Cs", and when the amount of chlorine ions contained in the sewage passing through the same measuring point at the same measurement time is the standard amount of chlorine ion "Ks", the standard amount of chlorine ion (Ks) is the standard chlorine ion concentration (Cs) ) Is multiplied by the standard flow rate (Qs). This is called the mass balance formula of chlorine ions. Where the letter s represents a standard.

Qs x Cs = Ks ........................................ .....(One)

Therefore, the total amount of standard chlorine ions contained in the sewage that passes through the sewer pipe for a predetermined time, that is, the total amount of standard chlorine ions (∑ Ksi) is represented by the following formula. Here, "∑" means a sum for a certain time, i represents a certain time, i = 1, 2, 3 ... n. Thus, ∑Ksi means the sum of the concentration of chlorine ions contained in the sewage after passing through the sewer pipe for 1 to n hours.

∑Qsi x ∑Csi = ∑Ksi ........................ (2 )

On the other hand, if there is no change in the size or population of any sewage treatment area and the living patterns of people living in the treatment area are constant, the total amount of chlorine ions contained in the sewage that has passed through the same period of time (1 to n) (∑ Ksi) Is constant. This is due to the experience that people living in certain sewage treatment areas have the same amount of chlorine ions discharged over time.

Therefore, the total flow rate of sewage measured in real time for a certain time (1 ~ n) at the same measuring point of any sewer pipe is called “∑Qri”, and the total amount of chlorine ion concentration measured in real time for the same time is “∑Cri”. In this case, the total amount of measured chlorine ions (∑Kri) contained in the sewage passing through the measuring point for the same time will be equal to the total amount of standard chlorine ions (∑Ksi) if there is no abnormality in the sewer pipe. Here the letter r stands for real. If this is expressed as an expression, it is as follows.

∑Kri = ∑Ksi ....................................... ..... (3)

Where i represents the same measurement time (1 to n). If you solve using equation (1),

∑Qri x ∑Cri = ∑Qsi x ∑Csi ................. (4)

However, if the sewage pipe breakage or damage has occurred upstream of the measuring point of the sewer pipe and the intrusion water flows into the pipe through the damaged part or the sewage in the pipe leaks to the outside, the total measured sewage flow rate (∑Qri) of the sewage pipe is increased or decreased. The total amount of chlorine ion concentration measured (∑Cri) will also increase or decrease.

For example, if damage has occurred to the sewer line resulting in infiltration water (Qinf) where the total flow rate of the measured sewage is increased compared to the total flow rate of the standard sewage, the total flow rate of the measured sewage (∑Qri) is equal to the total flow rate of the standard sewage ( Since ∑Qri) is equal to the sum of the total influent water flow rate (∑Qinf) introduced into the pipe through the damaged part, Eq. (3) can be summarized as follows.

∑ (Qri x Cri) = ∑ (Csi x Qsi) + ∑ (Cinf x Qinf) ..... (5)

Where Cinf is the concentration of chlorine ions in the infiltration water and Qinf is the flow rate of the infiltration water.

Therefore, to re-arrange Equation (5) to find the total amount of chlorine ion concentration measured at the measurement point,

∑Cri = (∑ (Csi x Qsi) + ∑ (Cinf x Qinf)) ÷ ∑Qri ............... (6)

∑Cri = (∑ (Csi x Qsi) + ∑ (Cinf x Qinf)) ÷ ∑ (Qsi + Qinf) ...... (7)

Where ∑Qri = ∑ (Qsi + Qinf), i.e., the total flow of measured sewage is the total flow of standard sewage plus the total flow of intruded water.

On the other hand, the problem in the sewage pipeline is not the inflow of contaminated water, such as sewage, but uncontaminated water, such as natural water causing problems in the sewage treatment facility. Therefore, when estimating the amount of infiltration, it is desirable to consider the infiltration water as natural water such as groundwater or rainwater. Therefore, in Equation (7), it is assumed that the chlorine ion concentration (Cinf) of the infiltration water is '0'. This is consistent with the fact that natural waters such as groundwater and rainwater contain very low levels of chlorine ions. In addition, the inflow of sewage into the sewage pipe is mostly consistent with the result that the measured chlorine ion concentration decreases and the sewage flow rate increases. In addition, the chlorine ion concentration (Cinf) of the intrusion water is assumed to be '0' and the intrusion water should be calculated to have the maximum infiltration water, which is advantageous for the maintenance of the sewer pipe.

Therefore, if we continue to summarize the above equation (6),

∑Cri = (∑ (Csi x Qsi) ÷ ∑ (Qsi + Qinf) ....................... (8)

Here, ∑ (Qsi x Csi) = ∑Ksi, so to sum up to find the total flow rate (∑Qinf) of intrusion water in this equation (8),

∑Cri = ∑Ksi ÷ ∑ (Qsi + Qinf) ....................... (9)

∑ (Qsi + Qinf) x ∑Cri = ∑Ksi .................... (10)

(∑Qsi x ∑Cri) + (∑Qinf x ∑Cri) = ∑Ksi ....................... (11)

(∑Qinf x ∑Cri) = ∑Ksi-(∑Qsi x ∑Cri) ....... (12)

∑Qinf = (∑Ksi-(∑Qsi x ∑Cri)) ÷ ∑Cri ..................... (13)

Thus, during the time when the measured chlorine ion concentration exceeds the standard chlorine ion concentration, that is, between the two points at which the measured chlorine ion concentration graph intersects the standard chlorine ion concentration graph (∑Ksi) and `` standard sewage '' Knowing the total flow rate (∑Qsi) and the total measured chlorine ion concentration (∑Cri) measured during that time, the ∑Qinf can be obtained. Here, the standard sewage total flow rate (∑Qsi) and the measured chlorine ion concentration total amount (∑Cri) can be calculated by comparing the standard graph and the measured graph, and the standard chlorine ion total amount (∑Ksi) is calculated from the mass balance equation "∑Ksi = Easily obtained from ∑Qsi x ∑Csi ".

Therefore, if the measured chlorine ion concentration graph knows the 'measured amount of chlorine ion concentration (∑Cri)', ie the amount of change in the measured chlorine ion concentration, during the time between the two intersections with the standard chlorine ion concentration graph, It is possible to estimate the amount of invasion without knowing the amount of sewage.

Next, a preferred embodiment of the sewage pipe monitoring system for achieving the sewage pipe monitoring method using the chlorine ion concentration of the present invention will be described.

As shown in Figure 5, the sewage pipe monitoring system of the present invention, the flow sensor 10, chlorine ion concentration sensor 20, and the flow sensor 20 and chlorine ion concentration installed at the same measurement point of the sewage pipe 110 Based on the chlorine ion concentration and flow rate data measured by the sensor 20, a 'measured chlorine ion concentration graph' and a 'measured flow graph' are prepared and compared with the 'standard chlorine ion concentration graph' and 'standard flow graph' It comprises a monitoring server 30 to analyze. At this time, the flow sensor 10 is installed in the sewage pipe 110 to measure the flow rate of sewage flowing through the sewage pipe. The chlorine ion concentration sensor 20 is installed at the same position as the flow sensor 10 to measure the concentration of chlorine ions contained in the sewage.

In addition, a plurality of sewage pipes 110 are installed in a predetermined sewage treatment zone, and a plurality of flow sensors 10 and chlorine ion concentration sensors 20 are installed in these sewage pipes 110 to be connected to the monitoring server 30 through a network. .

The flow sensor 10 measures the flow rate and the water level and calculates the flow rate by the measured flow rate and water level. The flow sensor 10 is fixed to the inner bottom of the sewage pipe connected to the manhole to measure the flow rate in the Doppler method or electromagnetic method and to measure the water level using the ultrasonic or pressure plate. The flow sensor 10 may be replaced by a variety of sensors apparent to those skilled in the art, so a detailed description thereof will be omitted. Therefore, the flow rate sensor of the present invention is not limited to the flow rate sensor of the above embodiment.

The chlorine ion concentration sensor 20 measures the concentration of chlorine ions using a potential difference between the comparison electrode and the ion electrode in response to the ion activity of chlorine ions in the sewage. The chlorine ion concentration sensor according to the present invention comprises a potentiometer, an ion electrode, a comparison electrode and a temperature sensor. The potentiometer is for continuously measuring the potential difference generated between the ion electrode and the comparison electrode, and the potential difference generated between the ion electrode and the comparison electrode can be read up to several units. The ion electrode has ion selectivity and generates an electric potential in proportion to the ion concentration. The ion to be analyzed varies depending on the configuration of the sensitive membrane. For example, solid membrane electrodes and liquid membrane electrodes are used to measure chlorine ions. However, the chlorine ion concentration sensor of the present invention is not limited to the chlorine ion concentration sensor of the above embodiment.

The monitoring server 30 is implemented by a plurality of computer devices connected to the network with a plurality of flow sensor 10 and the chlorine ion concentration sensor 20.

The network preferably includes a dedicated line or a code division multiple access (CDMA) network so that the monitoring server 30 can stably receive the information data of the sensor. Therefore, the measurement data measured by the flow sensor 10 and the chlorine ion concentration sensor 20 is transmitted to the monitoring server 30 in real time.

8 and 9, the flow sensor 10 and the chlorine ion concentration sensor 20 may be connected to the monitoring server 30 through a field control panel 40 having a power supply and a communication unit. The field control panel 40 supplies power to the flow rate sensor 10 and the chlorine ion concentration sensor 20, and processes the measured signals of these sensors and transmits them to the monitoring server 30. In addition, the field control panel 40 provides the flow rate and chlorine ion concentration data to the monitoring server 30 at the request of the monitoring server 30.

Referring to FIG. 8, the field control panel 40 receives an electrical signal measured in real time from the flow sensor 10 and the chlorine ion concentration sensor 20, and converts the sensor into a digital data. The measurement data processing unit 42 calculates the flow rate and chlorine ion concentration based on the data transmitted through the connection unit 41, and receives the real-time flow rate and chlorine ion concentration data obtained from the measurement data processing unit 42 to receive the network. Measurement data communication unit 43 for transmitting to the monitoring server 30 by using, a data control unit 45 for controlling the flow rate and chlorine ion concentration and measurement time data obtained from the measurement data processing unit 42, Data storage unit 44 for storing information about the flow rate and chlorine ion concentration and the measurement time. At this time, the sensor connection unit 41 and the measurement data processing unit 42 may process the flow rate and sewage chlorine ion concentration data separately. Preferably, the flow sensor 10 and the chlorine ion concentration sensor 20 are connected to the site control panel 40 is installed in each of the specified manholes of the manholes installed in the sewage pipe of the maintenance target area, respectively installed on the ground of the specified manholes It is connected to the remote monitoring server 30 via a network.

Next, referring to Figure 9, the monitoring server 30, flow rate and chlorine ion concentration from the flow rate sensor 10 and the chlorine ion concentration sensor 20 installed in the sewage pipe and the measurement time information and its own identification information, for example measurement 'Measurement Chlorine Ion Concentration Graph' at various time intervals using a reception module 34 for receiving location information, and a flow rate, chlorine ion concentration, measurement time and location information received in real time through the reception module 34; Create a 'measured flow graph', and create a 'standard chlorine ion concentration graph' and a 'standard flow graph' using the historical steady state flow rate, chlorine ion concentration, measurement time and location information stored in the database 33. By comparing these graphs, we monitor whether the chlorine ion concentration is out of the set range, calculate the chlorine ion concentration variation and the flow rate variation, and calculate the calculated chlorine ion concentration variation and Judging the types of leaks and intrusions based on the fluctuation amount, calculating the intrusion quantity, and in case the intrusion quantity exceeds a certain range, the central control server 35, which issues a warning signal to the administrator, and the sewer pipe diameter, distance or manhole position. And an operator computer 36 which receives the sewer pipe network basic information including sewage pipe network information and rainfall snowfall history information, and outputs a flow rate, chlorine ion concentration intrusion water and various graphs according to a user's request.

Preferably, the receiving module 34, the data communication with the field control panel 40 through the network communication network connection unit 31 for receiving the flow rate, chlorine ion concentration, measurement time and position information, and the communication network connection unit 31 It comprises a data collection server 32 for classifying the flow rate and the chlorine ion concentration received through the location information and the measurement time information and stored in the database 33.

The central control server 35 uses the received flow rate and chlorine ion concentration to create a 'measured flow graph' and 'measured chlorine ion concentration graph' or 'standard flow graph' and 'standard chlorine ion concentration graph'. The preparation unit 131 compares the measured chlorine ion concentration graph with the standard chlorine ion concentration graph to calculate the difference between the chlorine ion concentration and the variation in the chlorine ion concentration, and calculates the measured flow rate graph and the standard flow graph. Comparing to calculate the amount of change in the sewage flow rate, the analysis unit 132 for calculating the infiltration water based on the change amount of the chlorine ion concentration and the amount of change in the sewage flow rate, the measured amount of chlorine ion concentration and the amount of change in the chlorine ion concentration for a certain time and Comparing unit 133 for comparing whether the infiltration water is out of the preset range, the warning signal or the warning when the variation amount of the chlorine ion concentration and the variation amount of the infiltration water And an alarm unit 135 for generating a complementary signal, a measured flow rate graph and a measured chlorine ion concentration graph, a standard flow rate graph and a standard chlorine ion concentration graph, or a monitor 136 for displaying at a position on the sewer pipe network. .

Preferably, the graph preparation unit 131, 'measured chlorine ion concentration graph' and 'measured at various time intervals using the flow rate, chlorine ion concentration, measurement time and position information received in real time from the field control panel 40 A measurement graph graph creation unit for creating and displaying a measurement flow rate graph, and taking into account various factors such as the flow rate of the past steady state stored in the database 33, chlorine ion concentration, measurement time, location information, month, day, weather, etc. It includes a standard graph graph preparation unit for creating a 'standard chlorine ion concentration graph' and 'standard flow graph' of various time intervals to store in the graph storage unit 137.

In addition, the analysis unit 132 is a concentration fluctuation analysis unit for calculating a change amount of the chlorine ion concentration by comparing the 'measurement chlorine ion concentration graph' and 'standard chlorine ion concentration graph', 'measured flow graph' and 'standard flow rate A flow variation analysis unit for calculating the variation of the sewage flow rate by comparing the graph 'and an intrusion quantity analysis unit for determining the type of leakage and intrusion water based on the variation in the chlorine ion concentration and the variation of the sewage flow rate and calculating the intrusion quantity. It is done by

And the comparing unit 133 is a chlorine ion concentration comparison unit for comparing whether the measured chlorine ion concentration is out of the range of the predetermined chlorine ion concentration, and the total amount of the chlorine ion concentration measured for a predetermined time of the preset chlorine ion concentration It includes a total amount comparison unit of chlorine ion concentration to compare whether the total amount is exceeded, and the intrusion amount comparison unit for comparing whether the intrusion water measured for a certain time exceeds the preset intrusion water.

 The central control server 35 includes a database 33 for storing the received flow rate, chlorine ion concentration, measurement time and position information. In addition, the central control server 35 retrieves the flow rate and chlorine ion concentration stored in the database 33 according to the location information and the measurement time, or the standard graph stored in the graph storage unit 137. And a search unit 138 for searching using the measurement time or day or weather information.

Also, the central control server 35 removes the phase difference between the standard chlorine ion concentration graph, the measured chlorine ion concentration graph, the standard flow graph, and the measured flow graph to arrange the pattern of the standard graph and the pattern of the measured graph to match. The alignment unit 134 further includes. The graph arranging unit 134 is a fuzzy inference system, and as shown in FIG. 10, the fuzzy inference system () is configured to recognize a pattern of a measurement graph by using a feature amount of a recognized 'measurement graph' as an input signal. Generate a fuzzy value according to the stored fuzzy rule for recognizing the pattern of the standard graph by using the first fuzzy inference unit which generates a fuzzy value according to the stored fuzzy rule and the characteristic amount of the recognized 'standard graph' as an input signal. A fuzzy value is generated according to a stored fuzzy rule to recognize a difference between a standard graph pattern and a measured graph pattern by using a second fuzzy inference unit and a fuzzy value generated in each of the first and second inference units as input signals. It consists of a 3rd fuzzy inference part. The graph alignment unit 134 moves the standard graph based on the fuzzy value generated in the third fuzzy inference step so that the phases of the standard graph and the measurement graph coincide with each other.

As is well known, fuzzy theory makes it possible to mathematically deal with fuzzyness information, which is more indicative of the approximate and inexact nature of the real world than traditional logic systems. effective. For example, we can systematically process many obscure knowledge, information, and logic used by humans using fuzzy theory. A system for handling such ambiguous languages is called a fuzzy inference system, and the main feature of this fuzzy inference system is the concept of fuzzy partitioning of given information, which is a fuzzy set instead of a numerical value. The fuzzy set contains more information than a simple number.

In addition, the central control server 35, GIS information storage unit 140 for storing the geographic information of the area where the sewer pipe network to be monitored as a numerical map data, sewer pipe network information and rainfall consisting of sewer pipe diameter, distance or manhole location It further includes a sewer pipe network information storage unit 139 for storing the sewer pipe network basic information including snowfall history information.

The central control unit 130 of the central control server 35 includes one or more microprocessors that are operated by a set program. This set program includes a series of instructions for performing each step for performing each step for implementing the monitoring method of the present invention. That is, the central control unit 130 controls the various configurations of the central control server 35 described above, and transmits data to the data collection server 32, the database 33, and the operator computer 36, respectively. Control their behavior. Accordingly, the central control unit 130 receives the sewer pipe network basic information through the operator computer 36, reads numerical map data from the GIS information storage unit 140, and transmits the sewer pipe network basic information to the monitor 136. Display corresponding to the corresponding position on the numerical map.

Accordingly, in the sewage pipe monitoring system using the chlorine ion concentration according to the present invention, the data control unit 45 of the field control panel 40 controls the measurement data processing unit 42 to receive the real time analog received through the sensor connection unit 41. The signal is converted into digital data, respectively, and the flow rate and chlorine ion concentration data obtained through the measurement data processing unit 42 are measured time information (time and year, month, day) and location information (latitude and longitude or a specific code number). And transmits the obtained real-time flow rate, chlorine ion concentration and measurement time information to the monitoring server 30 through the measurement data communication unit 43 and is stored in the data storage unit 44 for a preset period. Data past the set period is deleted from the data storage unit 44. The data controller 45 reads the flow rate, chlorine ion concentration, and measurement time information from the data storage unit 44 when the data storage unit 44 is requested to transmit the stored data through the measurement data communication unit 43. The measurement data communication unit 43 is transmitted. That is, the data controller 45 may temporarily store data not transmitted during the failure period and retransmit after failure recovery when a communication failure of the network or a system failure of the monitoring server 30 itself occurs.

The database 33 filters and stores the real-time flow rate, chlorine ion concentration, and measurement time data received from the field control panel 40 after correcting the error data. For example, the flow rate of sewage and chlorine ion concentrations are compared to exclude error data such as chlorine ion concentrations measured in the absence of sewage. The corrected flow rate and chlorine ion concentration data are stored in the database 33 together with the measurement time and position information.

In addition, the graph preparation unit 131 filters the real-time flow rate, chlorine ion concentration, and measurement time data received from the field control panel 40 to correct error data, and then creates a graph of measured chlorine ion concentration at various time intervals. For example, FIG. 11A is a graph of measured chlorine ion concentration prepared in minutes, FIG. 11B is a graph of measured chlorine concentration prepared in units of time, FIG. 11C is a graph of measured chlorine concentration prepared in units of days, and FIG. 11D is prepared in weeks. Measurement Chlorine Ion Concentration Graph, FIG. 11E shows an example of the measurement chlorine ion concentration graph prepared on a monthly basis.

As shown, the measured chlorine ion concentration graph becomes smaller as the time interval increases and approaches the average concentration. In addition, different patterns are displayed according to time intervals such as days, weeks, months, and years. Therefore, the present invention makes it possible to compare and analyze the corresponding graphs by creating a 'measured chlorine ion concentration graph' and 'standard chlorine ion concentration graph' at various time intervals. However, these graphs are presented as an example to aid the understanding of the present invention, and do not coincide with the graph of the measured chloride ion concentration.

The standard graph storage unit 137 graphs and stores the flow rate and chlorine ion concentration of the past steady state among the flow rate of the sewage and the chlorine ion concentration stored in the database 33. The standard graph is prepared at various time intervals such as days, weeks, months, and years. In addition, the prepared standard graph is classified and stored according to various search factors such as month, day of the week, national holiday, weather as well as measurement time and place. Therefore, the standard chlorine ion concentration graph and the standard flow graph, which are most similar to the measured chlorine ion concentration graph and the measured flow graph, can be retrieved.

The monitor 136 displays a 'measured chlorine ion concentration graph' and displays the 'measured chlorine ion concentration graph' in the standard graph storage unit 137 based on the measurement time and location information of the chlorine ion concentration graph and the month, the day of the week, the national holiday and the weather. Standard Chlorine Ion Concentration Graph is searched and displayed together. The monitor 136 displays a 'standard chlorine ion concentration graph' created at regular time intervals, and a 'measured chlorine ion concentration graph' is created in real time to correspond thereto. When the situation such as the weather changes while the 'measured chlorine ion concentration graph' is generated, the search unit 138 loads a new 'standard chlorine ion concentration graph' in consideration of the change in the weather and displays it on the monitor 136.

The standard graph alignment unit 134 moves the standard graph left and right along the time axis in order to accurately compare the pattern of the standard chlorine ion concentration graph and the pattern of the measured chlorine ion concentration graph. As described above, the sewage pipe monitoring method according to the present invention continuously compares a standard graph and a measurement graph, and when a situation such as the weather changes, a standard graph created in a similar weather condition is called and displayed based on the weather information, and the standard graph and the measurement graph are displayed. If a phase difference occurs in the graph, the standard graph is moved and aligned.

On the other hand, the sewage pipe monitoring method using the chlorine ion concentration according to the present invention, as shown in Figure 6, when the alarm signal occurs in the alarm unit 135, after displaying the measuring points in which leaks and intrusion water occurred in the sewer pipe network A damaged sewer pipe search step S14 of searching for a damaged sewer pipe may be further performed. Referring to FIG. 12, for example, if the inflow of intrusion water is confirmed at the measurement point A of the sewage pipe network 100 consisting of a plurality of sewage pipes and the inflow of the intrusion water is not confirmed at the measurement point B, the intrusion water is eventually obtained. It can be assumed that the inflow is through the sewer line (a) or (b) between measurement point A and B. In this way, by measuring the sewage flow rate and chlorine ion concentration in the sewage pipes where inflow of water is suspected, the sewage pipes requiring replacement or repair can be identified.

In addition, in the sewage pipe monitoring method using the chlorine ion concentration according to the present invention, when it is confirmed that intrusion water is generated in a specific sewage pipe, the damage unit search step (S15) for searching at which point of the sewage pipe is generated to be further performed. Can be. Damage search step (S15) can be found by detecting the chlorine ion concentration passing through any two measurement points (C, D) of the sewage pipes, the damaged portion is generated. For example, if the chlorine ion concentration measured at the measurement point D and the chlorine ion concentration measured at the measurement point C are different, the distance between the two measurement points is due to the inflow of infiltration water or high concentration organic wastewater between the measurement point D and the measurement point C. By measuring the concentration of chlorine ion by narrowing down, it is possible to pinpoint the location of invasive water.

As such, using the damaged sewer pipe search step (S14) and damaged part search step (S15) according to the present invention, the advantages of convenient and low cost compared to the conventional visual survey, CCTV survey or sound survey into a self-driving car, etc. There is this.

The present invention has been described above with reference to embodiments which are considered to be practical at present, but the present invention should not be construed as being limited to these embodiments. Rather, it should be construed as including all modifications of the range that are easily changed by those skilled in the art from the above-described embodiment of the present invention to be considered equivalent.

10: flow sensor 20: chlorine ion concentration sensor
30: Monitoring Server 33: Database
34: receiving module 35: central control server
36: operator computer 40: field control panel
131: graph generation unit 132: analysis unit
133: comparison unit 135: alarm unit
136: monitor 137: standard graph storage unit
138: search unit 100: sewer pipe network
110: sewer pipe or sewer pipe

Claims (17)

A measuring step (S1) of measuring the flow rate of the sewage and the chlorine ion concentration passing through the same measuring point of the sewage pipe using the flow sensor and the chlorine ion sensor;
A storage step (S2) of storing the flow rate of the sewage and the chlorine ion concentration measured in the measuring step (S1);
A measurement concentration graph preparing step (S3) of preparing a 'measurement chlorine ion concentration graph' indicating a change in chlorine ion concentration with time of the chlorine ion concentration measured in the measuring step (S1);
A standard concentration graph preparing step (S4) of preparing a 'standard chlorine ion concentration graph' indicating a change in chlorine ion concentration over time of the past steady state chlorine ion concentration stored in the storage step (S2);
During the time out of the range of the standard chlorine ion concentration by comparing the 'measured chlorine ion concentration graph' created in the measurement concentration graph preparing step (S3) and the 'standard chlorine ion concentration graph' created in the standard concentration graph preparing step (S4). Calculating a concentration variation amount (S5) for calculating a 'change amount of chlorine ion concentration', which is the total amount of chlorine ion concentration of the;
Sewage pipe monitoring using the chlorine ion concentration, characterized in that it comprises an alarm generating step (S7) for sending an alarm signal when the amount of variation in the chlorine ion concentration calculated in the concentration variation calculation step (S5) exceeds a predetermined range Way. The method of claim 1,
When the alarm signal is received from the alarm generation step S7, a measurement flow rate graph for generating a 'measurement flow graph' indicating a flow rate of the sewage over time based on the flow rate of the measured sewage stored in the storage step S2. Step S8;
A standard flow graph generation step (S9) of preparing a 'standard flow rate graph' representing a change in the flow rate of the sewage over time of the flow rate of the past steady state stored in the storage step (S2);
Comparing the 'measured flow graph' created in the measurement flow graph preparation step (S8) and the 'standard flow graph' created in the standard flow graph preparation step (S9), 'the total flow rate of sewage for a time out of the standard flow rate range' A flow rate fluctuation calculating step (S10) for calculating a fluctuation amount of flow rate ';
Leakage and intrusions for estimating the types of leakage and intrusion water and the intrusion water quantity based on the variation in the chlorine ion concentration calculated in the concentration variation calculation step (S5) and the variation in the sewage flow rate calculated in the flow variation calculation step (S10). Number analysis step (S11);
Sewage conduit using a chlorine ion concentration, characterized in that it comprises a warning generating step (S12) for sending a warning signal to the manager when the amount of change of the leak and intrusion water analysis step (S11) exceeds a predetermined range Monitoring method. The method of claim 2,
When the alarm signal is received from the alarm generating step (S12) characterized in that it further comprises a damaged sewer pipe search step for searching for the sewer pipe where the leak and intrusion water is generated by displaying the measuring point where the leak and intrusion water occurred on the sewer pipe network; Sewage pipe monitoring method using chlorine ion concentration. The method of claim 3,
When leak and infiltration water is confirmed through the damaged sewer pipe search step, the chlorine ion concentration of the sewage passing through the two measuring points of the sewage pipe is measured, and the two measuring points are again reduced while narrowing the distance between the two measuring points. The sewage pipe monitoring method using a chlorine ion concentration, characterized in that further comprising the step of searching for damaged parts to find the location of intrusion water between the two measurement points by measuring the concentration of chlorine ion. A measuring step (S1) of measuring the flow rate and chlorine ion concentration of the sewage flowing through the sewage pipe using a flow sensor and a chlorine ion sensor;
Standard flow graphs and standard chlorine ion concentration graphs which store the measured sewage flow rate and chlorine ion concentration sequentially and show the average fluctuations in chlorine ion concentration over time based on past sewage flow rate and chlorine ion concentration. Creating a standard graph creating step (S4);
Based on the measured chlorine ion concentration, a `` measured chlorine ion concentration graph '' showing the change in chlorine ion concentration over time is prepared and compared with the `` standard chlorine ion concentration graph '' corresponding to the prepared `` measured chlorine ion concentration graph ''. A concentration variation calculation step (S5) of calculating a 'change amount of chlorine ion concentration', which is a total amount of chlorine ion concentration during a time out of the range of chlorine ion concentration;
Based on the measured sewage flow, create a 'measured flow graph' that shows the variation in flow over time and compare it with the 'standard flow graph' corresponding to the 'measured flow graph'. A flow rate fluctuation calculating step (S9) for calculating a 'flow amount of sewage flow rate', which is the total flow rate of the flow rate;
Sewage pipe monitoring method using a chlorine ion concentration characterized in that it comprises a leakage and intrusion water analysis step (S11) to calculate the type and leakage or intrusion water amount of intrusion water on the basis of the fluctuation amount of the chlorine ion concentration and the fluctuation of the sewage flow rate. . 6. The method of claim 5,
The standard graph preparation step (S4), the data storage step of sequentially storing the data of the measured sewage flow rate and chlorine ion concentration;
Prepare and save 'standard flow graph' and 'standard chlorine ion concentration graph' which show the fluctuations of sewage flow and chlorine ion concentration over time based on the sewage flow rate and chlorine ion concentration in the past before the sewer pipe is damaged. Sewer pipe monitoring method using a chlorine ion concentration, characterized in that it comprises a graph storage step. 6. The method of claim 5,
The concentration variation calculation step (S5), a measurement concentration graph preparing step of preparing a 'measurement chlorine ion concentration graph' indicating a change in chlorine ion concentration over time based on the measured chlorine ion concentration;
A concentration comparison step of comparing the prepared 'measured chlorine ion concentration graph' with a corresponding 'standard chlorine ion concentration graph';
When the measured chlorine ion concentration graph and the standard chlorine ion concentration graph are compared, the alarm signal when the total amount of chlorine ion concentration during the time out of the range of the standard chlorine ion concentration exceeds the preset range Sewer pipe monitoring method using a chlorine ion concentration, characterized in that made, including an alarm step to generate. 6. The method of claim 5,
The flow rate calculation step (S9),
A measurement flow graph preparation step of preparing a 'measurement flow graph' representing a change in the sewage flow rate over time based on the measured sewage flow rate;
The sewage pipe monitoring method using a chlorine ion concentration comprising a flow rate comparison step of comparing the prepared 'measured flow graph' and the corresponding 'standard flow graph'. 6. The method of claim 5,
The concentration fluctuation calculation step and the flow rate fluctuation calculation step may include measurement time, measurement location information, and day of the week for measuring the 'chlorine ion concentration graph' and the 'standard flow rate graph' and 'standard flow graph' corresponding to the 'measurement chlorine ion concentration graph' and 'measurement flow graph'. The sewer pipe monitoring method using a chlorine ion concentration, characterized in that it further comprises a standard graph search step to search using the search conditions, such as weather. The method of claim 9,
The concentration fluctuation calculation step and the flow fluctuation calculation step are performed in order to compare the searched 'standard chlorine ion concentration graph' and 'standard flow graph' with 'measured chlorine ion concentration graph' and 'measured flow graph'. Sewage monitoring using chlorine ion concentration further comprising a standard graph alignment step to move the standard flow graph in the time axis direction to form a pattern as close as possible to the 'measured chlorine ion concentration graph' and 'measured flow graph' Way. A flow sensor installed in the sewage pipe and measuring a flow rate of sewage passing through the sewage pipe;
A chlorine ion concentration sensor installed at the same position of the sewage pipe in which the flow sensor is installed to measure the chlorine ion concentration of the sewage passing through the sewage pipe;
Based on the chlorine ion concentration and the flow rate data measured by the flow sensor and the chlorine ion concentration sensor, a graph of standard chlorine ion concentration is prepared based on the chlorine ion concentration measured for a certain period of time before an abnormality occurs in the sewage pipe in the past. Based on the measured chlorine ion concentration, a measured chlorine ion concentration graph is prepared, and the measured chlorine ion concentration graph is compared with the standard chlorine ion concentration graph to analyze how the measured chlorine ion concentration deviates from the standard chlorine ion concentration, If the measured chlorine ion concentration is outside the set range of the standard chlorine ion concentration, the total amount of chlorine ion concentration during the period outside the set range is obtained to calculate the change amount of the chlorine ion concentration, and the change amount of the chlorine ion concentration exceeds the set change amount. In the past, if there is a problem Create a standard flow graph on the basis of the determined flow rate, create a flow chart on the basis of the flow rate measured in real time, compare them, and then compare them with the total amount of sewage during the period when the measured chlorine ion concentration is outside the set range of the standard chlorine ion concentration. That is, the amount of change of the flow rate is calculated, the type of infiltration water, the leakage and the amount of intrusion water are calculated based on the change amount of the chlorine ion concentration and the change amount of the flow rate, and a warning signal is generated in which the inflow water exceeds a predetermined range. Sewage pipe monitoring system using a chlorine ion concentration, characterized in that comprises a monitoring server. 12. The method of claim 11,
The monitoring server includes: a receiving module for receiving a flow rate, a chlorine ion concentration, a measurement time information, and a measurement position information from a flow sensor and a chlorine ion concentration sensor installed in the sewage pipe and storing the received flow rate and chlorine ion concentration data in a database;
Create 'measured chlorine ion concentration graph' and 'measured flow graph' at various time intervals using the flow rate, chlorine ion concentration, measurement time and location information received in real time, and the flow rate and chlorine ion of the past period stored in the database Using the concentration, measurement time, and location information, a 'standard chlorine ion concentration graph' and a 'standard flow graph' are prepared and compared, and the amount of variation in the chlorine ion concentration and the flow rate are calculated, and the chlorine ion concentration variation and the flow rate are compared. A central control server that calculates a variation of the intrusion water based on the variation and sends a warning signal when the variation exceeds the reference range;
Operator computer that receives sewage pipe network basic information including sewage pipe diameter, distance or manhole location and rainfall snowfall history information from user, and outputs flow rate, chlorine ion concentration intrusion quantity and various graphs according to user's request Sewage monitoring system using a chlorine ion concentration, characterized in that made, including 12. The method of claim 11,
The receiving module includes a communication network connection unit for receiving information about a flow rate and a chlorine ion concentration measured through a network, and a measurement time and a measurement location, and a flow rate and chlorine ion concentration received through the communication network connection unit based on location information and measurement time information. Sewage pipe monitoring system using a chlorine ion concentration, characterized in that consisting of a data collection server to store according to the classification database. 12. The method of claim 11,
The central control server includes a graph preparation unit for preparing a sewage measurement flow graph and a measured chlorine ion concentration graph or a standard flow graph and a standard chlorine ion concentration graph using the received flow rate and chlorine ion concentration;
Comparing the measured chlorine ion concentration graph and the standard chlorine ion concentration graph to calculate the fluctuation amount of the chlorine ion concentration and compare the measured flow graph and the standard flow graph to calculate the fluctuation of the sewage flow rate An analysis unit that calculates the intrusion water and the intrusion water amount based on the chlorine ion concentration change and the sewage flow rate change, and generates a warning signal when the intrusion water exceeds a certain range;
The sewage pipe monitoring system using a chlorine ion concentration, characterized in that it comprises an alarm unit for generating an alarm signal when the amount of variation in the chlorine ion concentration and the amount of intrusion water exceeds a predetermined range. 12. The method of claim 11,
The central control server searches the flow rate and the chlorine ion concentration stored in the database according to the location information and the measurement time, or the location information and the measurement time or the day or weather information of the standard graph stored in the standard graph storage unit. Sewer pipe monitoring system using a chlorine ion concentration, characterized in that it further comprises a search unit for searching by using. 16. The method of claim 15,
The central control server, the graph alignment to adjust the position of the standard graph so that the standard graph is most closely arranged to the measurement graph when comparing the standard chlorine ion concentration graph, the measured chlorine ion concentration graph and the standard flow graph and the measured flow graph Sewer pipe monitoring system using a chlorine ion concentration, characterized in that it further comprises a wealth. 17. The method of claim 16,
And a first fuzzy inference unit for generating a fuzzy value according to a stored fuzzy rule to recognize a pattern of the measured graph by using the recognized quantity of the measured value of the measured graph as an input signal, and the recognized standard graph. A second fuzzy inference unit for generating a fuzzy value according to a stored fuzzy rule in order to recognize a pattern of a standard graph by using the characteristic amount of as an input signal, and a fuzzy value generated in each of the first and second inference units, respectively; Sewage monitoring system using chlorine ion concentration comprising a fuzzy inference system composed of a third fuzzy inference unit generating a fuzzy value according to a stored fuzzy rule to recognize a difference between a standard graph pattern and a measured graph pattern as a signal. .

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