JP4980478B1 - Unknown water inflow location identification device - Google Patents

Abstract

To identify an inflow point of unknown water in a simple and accurate manner.
A receiving unit for receiving water quality data within a predetermined period; reference water quality data as a reference for comparison; water quality data within a predetermined period at each location; or water quality data within a predetermined period at each location And the like, and an inflow point specifying unit 14 for specifying an inflow point of unknown water based on the result of the first comparison unit 13. From the water quality data, etc., or the function that identifies the mixed location of groundwater and sewage on the condition that it deviates from the water quality data of other locations, etc. It has few functions to identify that it is a mixed place of rainwater and sewage on condition that it is deviated or relatively deviated from water quality data of other places or numerical values based on it. And about unknown water inflow identifying apparatus 10 to perform one of the functions.
[Selection] Figure 5

Description

  The present invention relates to an unknown water inflow point specifying device for specifying an unknown water inflow point such as a sewer pipe.

  In addition to the original sewage, inflow water generally called unknown water flows into the sewage facility. There are two types of intrusion water, one is “always intrusion water” that flows in on fine weather, and the other is “rain intrusion water” that intrudes in rainy weather. If there are cracks, misalignment or misconnections in manholes, sewer pipes and other incidental facilities, misidentification of drainage pipes in residential areas, unknown water flows over the original sewage, causing various problems. To do. There are sewage pipes that collect only sewage and storm water pipes that collect only stormwater.For example, when rainwater pipes are mistakenly connected to sewage pipes as an example of rainwater intrusion, Rainwater infiltrates into the pipe, and the sewage pipe overflows with a large amount of water, or the amount of treated water in the sewage treatment facility increases. On the contrary, if the sewage pipe is mistakenly connected to the rainwater pipe, the water in the stormwater pipe is always contaminated, which causes a problem of untreated sewage flowing into the public water area. Furthermore, as an example of constantly inundated water, when groundwater constantly enters the sewage pipe through cracks, the amount of water flowing through the sewage pipe increases steadily, leading to an increase in the amount of treated water in the sewage treatment facility. End up. In order to prevent such problems, it is necessary to investigate the inflow of unknown water regardless of whether it is regular or irregular.

  Conventionally, as a method for investigating an inflow portion of unknown water, a method of directly measuring a flow rate or a water level of water in a sewer pipe is known (see, for example, Patent Document 1 and Patent Document 2). In the method disclosed in Patent Document 1, a wireless IC tag reader is fixed to a floating body, communication is performed between a plurality of wireless tags installed on an inner wall of a pipeline, and a distance between the tag reader and the plurality of tags is determined. This is a method for obtaining the water level and flow velocity in the pipeline. Further, the method disclosed in Patent Document 2 is based on the rainfall data indicating the time series change of the rainfall in each area and the unknown water quantity data indicating the time series change of the unknown water quantity at the base point located downstream from the above area. The correlation value between data is calculated and the unknown water generation distribution in each district is estimated.

JP 2008-179992 A JP 2005-023763 A

  However, there is the following problem in the method of identifying the unknown water inflow portion by measuring the flow rate or level of water in the pipe. In the case of flow rate measurement, it is necessary to install an IC tag or the like on the inner wall of the pipe as in the method disclosed in Patent Document 1. Further, as a method other than the above method, since it is necessary to install a flume in the manhole invert portion, a special technique is required for installation of the device, and it is extremely difficult to specify an unknown water inflow portion. In the case of water level measurement, although it can be measured more easily than the flow rate measurement, a large error can be included in the water level measurement value in a time zone with a low flow rate such as at night. In addition, since errors in pipe slope and roughness coefficient cannot be ignored, it is not suitable for identifying unknown water inflow locations.

  The present invention has been made to solve such a problem, and an object thereof is to specify an unknown water inflow portion simply and accurately.

  The present inventor is not easily affected by the water level, topography, etc., and as a method for easily identifying an unknown water inflow point, paying attention to the difference in water quality between rainwater or groundwater and sewage, a method by measuring water quality Thought. Specifically, it is as follows.

  One embodiment of the present invention is an unknown water inflow point specifying device for specifying an inflow point of unknown water, and a receiving unit that receives water quality data within a predetermined period in at least one or a plurality of points, and a comparison unit A first comparison unit that compares reference water quality data serving as a reference or a numerical value based thereon with water quality data within a predetermined period at each location or numerical values based thereon, or between water quality data within a predetermined period at each location or numerical values based thereon, An inflow point specifying unit for specifying an inflow point of unknown water based on the result of the first comparison unit, and the inflow point specifying unit deviates from the reference water quality data or a numerical value based on the reference water quality data or is relatively different in clear weather. A machine that identifies groundwater and sewage as a mixed location on the condition that it deviates from the water quality data of the location or the numerical value based on it And in rainy weather, it is a function that specifies that it is a mixed location of rainwater and sewage on condition that it deviates from the reference water quality data or numerical values based on it or relatively deviates from the water quality data of other locations or numerical values based on it It is an unknown water inflow location specifying device that performs at least one of the functions.

  According to another embodiment of the present invention, an average value calculation unit that calculates an average value of water quality data within a predetermined period measured for each one or a plurality of locations, and a measurement for each one or a plurality of locations. A standard deviation value calculation unit that calculates the standard deviation value of the water quality data within the predetermined period, and in the first comparison unit, the average value and the standard deviation value of the water quality data at each location, Or compared with the average value and standard deviation value of the reference water quality data, at the inflow point specifying part, at least the average value is relatively small or large between the respective points, or at least the average value is the average value of the reference water quality data The location where the standard deviation value is relatively large between each location, or the standard deviation value is the standard deviation value of the reference water quality data. The base and larger portion is unclear water inflow identifying apparatus for identifying a mixed portion of rainwater and sewage.

  According to another embodiment of the present invention, the second comparison unit further compares, for each one or a plurality of locations, the clear daylight minimum value of the clear day water quality data and the rainy day minimum value of the rainy day water quality data. And a rainwater / sewage mixed point candidate selection unit that selects a rainy day / sewage mixed point candidate that has a rainy day minimum value equal to or less than a predetermined ratio with respect to the clear day minimum value, and each rainwater / sewage mixed point candidate In addition, the ratio of the rainy day minimum value to the sunny day minimum value is divided into multiple stages and multiplied by the weighting factor assigned to each category and the frequency belonging to each category, and the number multiplied by each category is divided into all categories The first comparison unit compares each point or with the reference score of the reference water quality data in the first comparison unit, and the inflow point identification unit determines a predetermined number from the descending order of the scores. The score of the location or reference score The listening point is unclear water inflow identifying apparatus for identifying a mixed portion of rainwater and sewage requiring priority correspondence.

  Another embodiment of the present invention further includes a water quality data selection unit that selects at least one of an average value or an extreme value of water quality data on a clear day at one or a plurality of locations, and the first comparison unit includes: Compare the average value or extreme values of multiple locations with each other, or the average value or extreme value of the reference water quality data, and at the inflow location specifying part, compare at least between multiple locations or with the reference water quality data Where the minimum value of the average value or extreme value is the smallest, or where the maximum value of the average value or extreme value is the largest in comparison with the reference water quality data relative to a plurality of locations. It is an unknown water inflow point identification device that identifies the mixing point of groundwater and sewage.

  Another embodiment of the present invention is an unknown water inflow point specifying device further including a water quality measuring device for measuring water quality data.

  One embodiment of the present invention is a computer program that, when installed on a computer and executed, allows the computer to function as an unknown water inflow point specifying device for specifying an unknown water inflow point, A receiving unit for receiving water quality data within a predetermined period in at least one or a plurality of locations; reference water quality data serving as a reference for comparison or numerical values based thereon, and water quality data within a predetermined period at each location or numerical values based thereon, Or the 1st comparison part which compares the water quality data in the predetermined period in each location, or the numerical values based on it; The inflow location specific | specification part which identifies the inflow location of unknown water based on the result of a 1st comparison unit, Comprising: Deviate from the reference water quality data or numerical values based on it, or A function that identifies the mixed location of groundwater and sewage on the condition that it is relatively deviated from the water quality data of other locations or values based on it, and in rainy weather, it is deviated or relative to the reference water quality data or values based on it Each of the components of the inflow point identifying unit that executes at least one of the functions of identifying the mixed point of rainwater and sewage on the condition that it deviates from the water quality data of other points or the numerical value based thereon It is a computer program which performs the operation | movement of.

  According to another embodiment of the present invention, an average value calculating unit that calculates an average value of the measured water quality data within a predetermined period for each one or a plurality of locations is further provided to the computer; The standard deviation value calculation unit for calculating the standard deviation value of the water quality data within the predetermined period measured for each operation is performed, and the operation of the first comparison unit is performed as the operation of the water quality data at each location. Compare the average value and the standard deviation value with each other or with the average value and the standard deviation value of the reference water quality data, and as an operation of the inflow point specifying part, at least the average value is relatively small between the points or Identify large areas, or at least areas where the average value is smaller or larger than the average value of the reference water quality data as mixed areas of groundwater and sewage, and the standard deviation value is relative between each area. This is a computer program that identifies a large part or a part where the standard deviation value is larger than the standard deviation value of the reference water quality data as a mixed part of rainwater and sewage.

  According to another embodiment of the present invention, the computer further compares, for each of one or more locations, the clear day minimum value of the clear day water quality data and the rainy day minimum value of the rainy day water quality data. The second comparison unit that selects the rainwater / sewage mixture point candidate selection part that selects the rainy day / sewage mixing point candidate that has a rainy day minimum value that is less than or equal to the predetermined percentage of the sunny day minimum value; For each location candidate, the ratio of the rainy day minimum value to the sunny day minimum value is divided into multiple stages, multiplied by the weighting factor assigned to each category and the frequency belonging to each category, and the number multiplied in each category The score calculation unit that adds the values in all categories is operated, and the operation of the first comparison unit is compared with each other or with the reference score of the reference water quality data as the operation of the first comparison unit. Relatively score as behavior A predetermined number of points from the descending order, or a large portion of the score with respect to a reference score, is a computer program for identifying a mixed portion of rainwater and sewage requiring priority correspondence.

  According to another embodiment of the present invention, the operation of a water quality data selection unit further selects at least one of an average value or an extreme value of water quality data on a clear day at one or a plurality of locations with respect to a computer. As the operation of the first comparison unit, as compared with the average value or extreme values of a plurality of locations, or the average value or extreme value of the reference water quality data, as the operation of the inflow location specifying unit, at least a plurality of Where the average value or the minimum of the extreme values is the smallest relative to each other or in comparison with the reference water quality data, or the average value or the relative value between multiple locations or in comparison with the reference water quality data This is a computer program that identifies the place where the maximum of the extreme values is the largest as the mixed place of groundwater and sewage.

  One embodiment of the present invention is an unknown water inflow location specifying method for specifying an inflow location of unknown water, wherein at least one or a plurality of the inflow locations of unknown water are specified from a water quality measuring device. A reception step for receiving water quality data within a predetermined period at a location, and in the device, reference water quality data as a reference for comparison or a numerical value based on it, and water quality data within a predetermined period at each location or a numerical value based on it, or at each location A first comparison step for comparing water quality data within a predetermined period or numerical values based thereon and an inflow point specifying step for specifying an inflow point of unknown water based on the processing result of the first comparison step are performed. In specific steps, in clear weather, deviation from the reference water quality data or numerical values based on it, or other relative A function that identifies the location as a mixed location of groundwater and sewage on the condition that it deviates from the water quality data of the location or the value based on it, and in rainy weather, it deviates from the reference water quality data or the value based on it or is relatively other location This is an unknown water inflow location identifying method that executes at least one of the functions of identifying that the location is a mixed location of rainwater and sewage on the condition that it deviates from the water quality data or numerical values based thereon.

  According to another embodiment of the present invention, in the above apparatus, an average value calculating step for calculating an average value of the measured water quality data within a predetermined period for each of one or a plurality of locations; The standard deviation value calculating step for calculating the standard deviation value of the measured water quality data within a predetermined period is executed for each location. In the first comparison step, the average value and the standard deviation value of the water quality data at each location are calculated. In comparison with the average value and standard deviation value of the reference water quality data between each location, in the inflow location specifying step, at least the average value is relatively small or large between each location, or at least the average value is A location that is smaller or larger than the average value of the reference water quality data is identified as a mixing location of groundwater and sewage, and locations where the standard deviation value is relatively large between each location are There is unknown water inflow part specifying how the standard deviation value is larger portion than the standard deviation of the reference water data specifying the mixing portion of the rainwater and sewage.

  According to another embodiment of the present invention, in the above-mentioned device, the clear day minimum value of clear day water quality data and the rainy day minimum value of rainy day water quality data are compared for each one or a plurality of locations. A second comparison step, a rainwater / sewage mixed point candidate selection step for selecting a rainy day / sewage mixed point candidate as a rainy day / sewage mixed point candidate, and a rainwater / sewage For each mixed location candidate, the ratio of the rainy day minimum value to the sunny day minimum value is divided into multiple stages, multiplied by the weighting factor assigned to each category, and the frequency belonging to each category, and multiplied by each category A score calculation step of adding the total number in all categories, and in the first comparison step, it compares with each other or with the reference score of the reference water quality data. In descending order Luo predetermined number of points, or a large portion of the score with respect to a reference score, is unknown water inflow part specifying process of specifying a mixed portion of rainwater and sewage requiring priority correspondence.

  In another embodiment of the present invention, the apparatus further includes a water quality data selection step of selecting at least one of an average value or an extreme value of the water quality data on a clear day at one or a plurality of locations. In the first comparison step, the average values or extreme values of a plurality of locations are compared with each other, or the average value or extreme value of the reference water quality data. The point where the minimum value of the average value or extreme value is the smallest in comparison with the reference water quality data, or the relative value between multiple points or the maximum value of the average value or extreme value in comparison with the reference water quality data This is an unknown water inflow location identification method that identifies the location where the maximum is as the mixing location of groundwater and sewage.

  According to the present invention, it is possible to identify an inflow portion of unknown water easily and accurately.

FIG. 1 is a diagram showing a situation in which water quality measuring devices are arranged in various sewage pipes. FIG. 2 is a plan view of a sewer network buried underground. FIG. 3 is a diagram for explaining the characteristics of a groundwater infiltration type in which groundwater enters the sewage pipe. FIG. 4 is a diagram for explaining the characteristics of the rainwater infiltration type in which rainwater enters the sewage pipe. Drawing 5 is a mimetic diagram showing the situation of receiving data from the composition of the unknown water inflow point specific device concerning the first embodiment of the present invention, and a water quality measuring device. FIG. 6 is a flowchart showing the flow of each process from measurement of water quality to identification of an unknown water inflow location in the unknown water inflow location identification method according to the first embodiment. FIG. 7: is a schematic diagram which shows the condition which receives the data from the structure of the unknown water inflow location identification apparatus which concerns on 2nd embodiment of this invention, and a water quality measuring device. FIG. 8 is a flowchart showing the flow of each process from measurement of water quality to identification of an unknown water inflow location in the unknown water inflow location identification method according to the second embodiment. FIG. 9 is a graph showing the transition of water quality data in each of a plurality of sewage pipes within a predetermined period (one month) and the rainfall amount of each day within the predetermined period in the second embodiment. FIG. 10 is a table showing average values and standard deviation values calculated based on the transition of each water quality data shown in FIG. FIG. 11 is a graph obtained by plotting them on the XY axis plane taking the X axis and the Y axis based on the average value and the standard deviation value shown in FIG. FIG. 12: is a schematic diagram which shows the condition which receives data from the structure of the unknown water inflow location identification apparatus which concerns on 3rd embodiment of this invention, and a water quality measuring device. FIG. 13: is a flowchart which shows the flow of each process from the measurement of water quality to the identification of the location which should correspond preferentially in the mixing location of rainwater and sewage in the unknown water inflow location specification method which concerns on 3rd embodiment. It is. FIG. 14 is a graph showing the transition of water quality data on a clear day and the transition of water quality data for three days on a rainy day in a certain sewage pipe in the third embodiment. FIG. 15 is a table comparing the frequencies belonging to each category of the minimum value of the water quality data on a rainy day with respect to the minimum value of the water quality data on a clear day in five sewage pipes. FIG. 16 is a table for comparing scores obtained by multiplying the frequencies shown in FIG. 15 by weighting factors assigned to the respective sections in five sewage pipes. FIG. 17: is a schematic diagram which shows the condition which receives data from the structure of the unknown water inflow location identification apparatus which concerns on 4th embodiment of this invention, and a water quality measuring device. FIG. 18: is a flowchart which shows the flow of each process from measurement of a water quality to specification of the mixing location of groundwater and sewage in the unknown water inflow location specification method which concerns on 4th embodiment. FIG. 19 is a graph showing a comparison of fluctuation ranges of water quality data in a plurality of sewage pipes in the fourth embodiment.

  Next, each embodiment of the unknown water inflow location specifying device, the computer program that can be installed and executed in the unknown water inflow location specifying device, and the unknown water inflow location specifying method according to the present invention will be described with reference to the drawings.

<First embodiment>
FIG. 1 is a diagram showing a situation in which water quality measuring devices are arranged in various sewage pipes. FIG. 2 is a plan view of a sewer network buried underground.

  In this embodiment, the water quality measurement of the water flowing through the sewer pipe 1 which is an example of the location to be measured is the chain 3 connected to the water quality measuring device 4 in the invert of the manhole as illustrated in FIG. Is fixed by the anchor 2 and the sensor portion of the water quality measuring device 4 is immersed in water. Here, in addition to the sewer pipe 1 that is generally provided on public roads, the location to be measured is a public basin or drain pipe that is provided in a residential area such as a residential area as illustrated in FIG. Including. Water quality is broadly interpreted to include electrical conductivity (EC), chloride ion concentration, pH, and water temperature. The sewage pipe 1 may be of any type as long as it is a pipe into which water flows. For example, the sewage pipe 1 includes sewage such as domestic effluents typified by settlement drainage other than sewers, and pipe facilities that collect rainwater. Unknown water is water that should not flow in and is not known as groundwater, rainwater, or other types of water. A sunny day or a sunny day means a time when there is no rain or a day without rain. The rainy day or rainy day means when there is rain or when there is rain.

  The feature of the present invention is that the water quality measuring device 4 is installed in a manhole, a sewer pipe such as a pipe, and an auxiliary facility such as Masashi, and the water quality is determined for a predetermined period including at least one of a fine day and a rainy day. Changes in water quality when rainwater flows into the sewage that should flow through the sewer pipe 1 or when sewage flows into the stormwater that should flow, and changes in water quality when groundwater flows into the sewage that should flow The unknown water to infiltrate and the invading location are identified using the difference between the two. In this embodiment, the sewage pipe 1a that mainly flows sewage as a subordinate concept thereof will be mainly described as an example of the sewage pipe 1, and the electrical conductivity (EC) will be described as an example of the water quality to be measured. Further, the number of locations where EC is measured is five manholes A to E in the sewage area as shown in FIG.

  FIG. 3 is a diagram for explaining the characteristics of a groundwater infiltration type in which groundwater enters the sewage pipe. FIG. 4 is a diagram for explaining the characteristics of the rainwater infiltration type in which rainwater enters the sewage pipe.

  First, the groundwater infiltration type will be described with reference to FIG. On a clear day, the water quality measuring device 4 is arranged in a certain sewage pipe 1a, EC is measured at regular time intervals (for example, every 10 minutes), and the measurement is continued for 24 hours. When only sewage flows through the sewage pipe 1a and there is no infiltration of groundwater, the EC time transition is as shown in FIG. On the other hand, when it is assumed that no seawater is mixed, since the groundwater itself has a lower EC than the sewage, the EC has a substantially constant time transition as shown in FIG. Therefore, if groundwater has infiltrated into the sewage, as shown in FIG. 3C, the EC of the sewage + groundwater (solid line) is the EC transition (dotted line) of the other sewage pipes 1a without intrusion of groundwater. Compared with, it becomes uniformly lower regardless of the transition of time.

  Next, the rainwater infiltration type will be described with reference to FIG. When the water quality measuring device 4 is arranged in a certain sewage pipe 1a on a clear day, EC is measured every fixed time (for example, every 10 minutes), and when the measurement is continued for 24 hours, only sewage flows into the sewage pipe 1a. Since rainwater does not enter, the time transition of EC is as shown in FIG. Here, as shown in FIG. 4A, it is assumed that a certain amount of rain has occurred on a rainy day. In this case, as shown in FIG. 4C, the rainy day sewage + rainwater EC (solid line) is compared with the EC transition (dotted line) of the same sewage pipe 1a on a clear day, the rainy time zone. And it becomes low in the time zone immediately after that. Note that even when sewage enters the pipe through which rainwater flows originally, the amount of rainwater increases in the vicinity of the raining time zone, so the EC decreases only in the vicinity of that time zone.

  As described above, when the EC decreases in all measurement time zones, regardless of the weather, as compared with the EC in the normal sewage pipe 1a without ingress of groundwater, the sewage pipe 1a to be measured has the groundwater infiltration type. It is thought that it belongs to. On the other hand, in the same sewage pipe 1a, when the EC becomes lower in the rainy time zone and immediately after that in comparison with the transition of EC on a clear day, the sewage pipe 1a to be measured is considered to belong to the rainwater infiltration type. It is done.

  Drawing 5 is a mimetic diagram showing the situation of receiving data from the composition of the unknown water inflow point specific device concerning the first embodiment of the present invention, and a water quality measuring device.

  The unknown water inflow location identifying device 10 according to this embodiment is a device for identifying an unknown water inflow location based on water quality data from a water quality measuring device 4 that measures the water quality in one or more sewer pipes 1 respectively. It is. The unknown water inflow location specifying device 10 preferably includes a receiving unit 11, a storage unit 12, a first comparison unit 13, an inflow location specifying unit 14, and an interface 15. The receiving unit 11 is a part that receives water quality data (here, EC) within a predetermined period (for example, one month) in at least one or a plurality of sewer pipes 1 regardless of whether it is wired or wireless. . The storage unit 12 is a part that stores at least the received water quality data. However, the memory | storage part 12 may memorize | store beforehand the data (reference | standard water quality data) used as the reference | standard for comparing with the water quality data obtained by measuring in the sewer pipe 1. FIG. For example, the reference water quality data is water quality data at least in the sewage pipe 1a where rainwater does not flow when specifying an inflow location of rainwater, and at least groundwater when specifying an inflow location of groundwater. It is water quality data in the sewage pipe 1a without any inflow of water, and in a broader sense, is data to be compared in finding some inflow of unknown water. The reference water quality data may be data sent from the water quality measuring instrument 4 side or data stored in the storage unit 12 by default.

  When using the reference water quality data, the first comparison unit 13 is a part that compares the reference water quality data with the water quality data in one or more sewer pipes 1 to be measured. Moreover, when not using reference | standard water quality data, the 1st comparison part 13 is a part which compares the water quality data in the some sewer pipe 1 used as a measuring object relatively. The first comparison unit 13 may use water quality data such as EC as a comparison target, and may also use a numerical value obtained by calculation based on the water quality data as a comparison target.

  The inflow location specifying part 14 is a part for specifying the inflow location of unknown water based on the comparison result by the first comparison unit 13. More specifically, the inflow location specifying unit 14 is deviated from the reference water quality data or a numerical value based on the reference water quality data or a value based on the water quality data of other sewer pipes 1 or a numerical value based on the water quality data in a clear sky. The sewer pipe 1 is a part that performs the function of specifying that it is a mixed location of groundwater and sewage. In addition, the inflow point specifying unit 14 is subject to the condition that it deviates from the reference water quality data or a numerical value based on it or relatively deviates from the water quality data of other sewer pipes 1 or a numerical value based on the water quality data in the rainy weather. It is a part which performs the function which specifies that the water pipe 1 is a mixing location of rainwater and sewage. The inflow location specifying unit 14 can execute at least one of a function for specifying a location where rainwater and sewage are mixed and a function for specifying a location where groundwater and sewage are mixed.

  The interface 15 is not an indispensable configuration, but can be connected to an external device by wire or wirelessly, and transmits information to the outside of the unknown water inflow point specifying device 10 or receives information from outside the water quality measuring device 4 It is a connection part for doing. For example, an input device such as a keyboard or a pointing device can be connected to the interface 15 and various inputs can be made to the unknown water inflow point specifying device 10.

  Each function of the receiving unit 11 and the interface 15 can be realized by, for example, a printed circuit board (PCB) on which a contact and a CPU electrically connected to the contact are mounted. The storage unit 12 can be realized by an electronic component or device having a memory function such as a RAM or an HDD. The 1st comparison part 13 and the inflow location specific | specification part 14 are realizable with a microcomputer and CPU, for example. The receiving unit 11, the storage unit 12, the first comparison unit 13, the inflow location specifying unit 14, and the interface 15 may be capable of executing each function with one PCB in which a plurality of electronic components are connected by conductive wires, or A plurality of PCBs or devices may be connected to execute each function.

  The unknown water inflow portion specifying device 10 may be a dedicated device for specifying the unknown water inflow portion, but can also be realized by installing a specific computer program in a general-purpose computer and executing it. The computer program in that case is preferably a computer program that causes the computer to perform at least the operations of the components of the reception unit 11, the first comparison unit 13, and the inflow portion identification unit 14.

  As shown in FIG. 5, the water quality measuring device 4 suitably includes a sensor 5 exposed to the outside, a control unit 6 including a CPU stored inside, a storage unit 7 including RAM and ROM, and an interface 8. Prepare. The sensor 5 is a detection part that measures water quality such as EC. The control unit 6 is a part that processes the detected signal. The memory | storage part 7 is a part which memorize | stores the detected signal, the water quality data calculated from the said signal, or the numerical value calculated from the said water quality data. The interface 8 is a connection part for outputting water quality data and the like to the outside of the water quality measuring device 4, and may be a loading port having a structure in which a memory disk or the like can be inserted and removed. FIG. 5 shows only the structure of some of the water quality measuring instruments 4, but the other water quality measuring instruments 4 have the same configuration.

  FIG. 6 is a flowchart showing the flow of each process from measurement of water quality to identification of an unknown water inflow location in the unknown water inflow location identification method according to the first embodiment.

  First, the water quality measuring device 4 is arranged inside the sewer pipe 1, and water quality data within a predetermined period (for example, one day, one week, one month) is measured (step S101). The measurement is preferably performed at regular intervals, such as every hour or every 10 minutes. As a result, the signal detected by the sensor 5 is stored in the storage unit 7 through the control unit 6. Next, when the water quality measuring device 4 is connected to the unknown water inflow location specifying device 10 and a command is sent from the unknown water inflow location specifying device 10 or the water quality measuring device 4, the receiving unit 11 of the unknown water inflow location specifying device 10 Water quality data is received from the water quality measuring instrument 4 side (step S102: reception step). Next, the unknown water inflow location specifying device 10 stores the received water quality data in the storage unit 12 (step S103). Next, the 1st comparison part 13 compares the water quality data (or numerical values based on it) in the predetermined period in each sewer pipe 1 (step S104: 1st comparison step). Moreover, the reference | standard water quality data is memorize | stored in the memory | storage part 12, and when comparing the water quality data measured in the 1 or several sewer pipe 1 with reference | standard water quality data, in step S104, the 1st comparison part 13 is: Based on the reference water quality data (or a numerical value based on it), it is compared with the water quality data (or a numerical value based on it) measured in one or a plurality of sewer pipes 1. Next, the condition where the inflow point specifying unit 14 deviates from the reference water quality data (or a numerical value based thereon) or relatively deviates from the water quality data (or a numerical value based thereon) of the other sewer pipes 1 on a clear day. In addition, the sewage pipe 1 to be measured is specified as a mixing location of groundwater and sewage (step S105: inflow location specifying step). In addition, the inflow point specifying unit 14 is deviated from the reference water quality data (or a numerical value based thereon) or relatively deviated from the water quality data (or a numerical value based thereon) of the other sewer pipes 1 in the rainy weather. Then, the sewage pipe 1 to be measured is specified as a mixed location of rainwater and sewage (step S106: inflow location specifying step). The flowchart shown in FIG. 6 is an example having a function of specifying both the rainwater and sewage mixing point and the groundwater and sewage mixing point, but the unknown water inflow point specifying method according to this embodiment is the groundwater and sewage. When only specifying the mixing location is performed, only step S105 can be performed, and when only specifying the mixing location of rainwater and sewage is performed, only step S106 can be performed.

<Second embodiment>
FIG. 7: is a schematic diagram which shows the condition which receives the data from the structure of the unknown water inflow location identification apparatus which concerns on 2nd embodiment of this invention, and a water quality measuring device.

  The unknown water inflow point specifying device 20 and the water quality measuring device 4 according to the second embodiment enable transmission and reception of water quality data by wireless communication. For this reason, the water quality measuring device 4 includes a transmitter 9 and a transmission antenna 18 in addition to the configuration stored in the water quality measuring device 4 described in the first embodiment. In FIG. 7, only a part of the structure of the water quality measuring device 4 is shown, but the other water quality measuring devices 4 in this embodiment and the following embodiments have the same configuration. The unknown water inflow point identifying device 20 includes a receiving antenna 21 for receiving water quality data transmitted from the water quality measuring device 4.

  The receiving unit 11 in the unknown water inflow point identifying device 20 is a part that is connected to the receiving antenna 21 and receives the water quality data transmitted from the water quality measuring device 4. The storage unit 12 and the interface 15 have the same functions as those in the first embodiment. The average value calculation unit 22 is a part that calculates an average value of water quality data within a predetermined period (for example, one month) measured for each of one or a plurality of sewer pipes 1. The standard deviation value calculation unit 23 is a part that calculates the standard deviation value of the water quality data that is the target of the average value calculation. The first comparison unit 13 compares the average value and standard deviation value of the water quality data in each sewer pipe 1 with each other, or if there is reference water quality data, the average value and standard deviation value of the reference water quality data. Compare with The inflow location specifying unit 14 compares the sewage pipes 1 with each other, specifies the upper predetermined number (for example, 1 or 2) having at least a small average value or a large average value as a mixing location of groundwater and sewage, The upper predetermined number (for example, 1 or 2) with a large standard deviation value is compared between the sewage pipes 1 and specified as a mixed portion of rainwater and sewage. In addition, when the reference water quality data is stored in the storage unit 12 and the first comparison unit 13 compares the reference water quality data with the reference, the inflow point specifying unit 14 compares at least the average value of the reference water quality data. Then, specify the sewage pipe 1 having a small or large average value as a mixing point of groundwater and sewage, and below the upper predetermined number (for example, 1 or 2) having a large standard deviation value compared with the standard deviation value of the reference water quality data. The water pipe 1 can be specified as a mixing point of rainwater and sewage.

  The average value calculation unit 22 and the standard deviation value calculation unit 23 can be realized by a microcomputer or a CPU, for example. The average value calculation unit 22 and the standard deviation value calculation unit 23 may be a single component, and in that case, can be integrated into an “average value / standard deviation value calculation unit”. In addition, the specific hardware of the receiving part 11, the memory | storage part 12, the 1st comparison part 13, the inflow location specific | specification part 14, and the interface 15 is the same as that of 1st embodiment.

  The unknown water inflow point specifying device 20 may be a dedicated device for specifying the unknown water inflow point, but can also be realized by installing a specific computer program in a general-purpose computer and executing it. The computer program in that case is preferably at least for each component of the receiving unit 11, the first comparison unit 13, the inflow point specifying unit 14, the average value calculating unit 22, and the standard deviation value calculating unit 23 with respect to the computer. It is a computer program that performs an operation.

  FIG. 8 is a flowchart showing the flow of each process from measurement of water quality to identification of an unknown water inflow location in the unknown water inflow location identification method according to the second embodiment. FIG. 9 is a graph showing the transition of water quality data in each of a plurality of sewage pipes within a predetermined period (one month) and the rainfall amount of each day within the predetermined period in the second embodiment. FIG. 10 is a table showing average values and standard deviation values calculated based on the transition of each water quality data shown in FIG. FIG. 11 is a graph obtained by plotting them on the XY axis plane taking the X axis and the Y axis based on the average value and the standard deviation value shown in FIG.

  First, the water quality measuring device 4 is disposed inside one or more sewage pipes 1a, and water quality data within a predetermined period (for example, one month) is measured (step S201). The measurement interval can be selected as appropriate, for example, every 10 minutes. As a result, the signal detected by the sensor 5 is stored in the storage unit 7 through the control unit 6. Next, water quality data within a predetermined period is transmitted from the water quality measuring device 4 to the unknown water inflow point identifying device 20 by wireless communication (step S202). The receiving unit 11 of the unknown water inflow point identifying device 20 receives water quality data from the water quality measuring instrument 4 side (step S203: reception step). Next, the memory | storage part 12 of the unknown water inflow location identification apparatus 20 memorize | stores the received water quality data (step S204). The storage unit 12 may store reference water quality data within a predetermined period. Since the reference water quality data has already been described in the first embodiment, the description thereof is omitted here.

  Here, an example in which EC for one month at three points of the sewage pipe 1a (referred to as “point A”, “point B”, and “point C”, respectively) is measured will be described. In addition, hereinafter, information on rainfall per hour (mm / hr) in the areas of points A, B, and C is also stored in the storage unit 12 through the interface 15 or by transmission from the water quality measuring device 4 side. The explanation is based on the assumption.

  By the processing up to step S204, the unknown water inflow point specifying device 20 acquires each water quality data shown in the graph of FIG. At point A, when compared with the transition of water quality data at points B and C, there is a tendency for EC to decrease during rainfall. On the other hand, at point B, when compared with the transition of the water quality data at points A and C, the EC is constantly decreasing throughout the month regardless of whether it is raining or not. The graph showing the transition of the water quality data shown in FIG. 9 may be obtained by the processing of the CPU included in the control unit 6 of the water quality measuring device 4 or obtained by the processing of the CPU on the unknown water inflow point specifying device 20 side. It can be used.

  Subsequent to step S204, the average value calculation unit 22 calculates an average value of EC for each of the points A, B, and C (step S205: average value calculation step). Further, the standard deviation value calculation unit 23 calculates the EC standard deviation value for each of the points A, B, and C (step S206: standard deviation value calculation step). It should be noted that step S205 and step S206 may be one step in which arithmetic processing is performed at the same time, or step S206 may be executed prior to step S205 in reverse. Furthermore, both the average value and the standard deviation value may be calculated for each point. In that case, a step of calculating an average value and a standard deviation value of EC at point A, a step of calculating an average value and a standard deviation value of EC at point B, and a step of calculating an average value and a standard deviation value of EC at point C Can be divided into time series. As a result of the calculation in step S205 and step S206, the average values and standard deviation values shown in the table of FIG. 10 are obtained at points A, B, and C.

  When the average values and the standard deviation values at the points A, B, and C are plotted on the average value (X) -standard deviation value (Y) plane, they are as shown in FIG. The graph creation step shown in FIG. 11 is not necessarily performed, but when creating the graph, for example, any one of the average value calculation unit 22, the standard deviation value calculation unit 23, the first comparison unit 13, or the inflow location specifying unit 14 Or one or more joints. Subsequent to step S206, the first comparison unit 13 compares the average values and the standard deviation values of the water quality data measured at the sewage pipes 1a at the points A, B, and C (step S207: first comparison step). ). As a result, the inflow point specifying unit 14 specifies the sewage pipe 1a at the point B having the relatively smallest average value as a mixed point of groundwater and sewage (step S208: inflow point specifying step). Moreover, the inflow location specific | specification part 14 specifies the sewage pipe 1a of the point A with a comparatively largest standard deviation value as a mixing location of rainwater and sewage (step S209: inflow location specification step). In addition, the inflow location specifying step S208 is not limited to the above three locations, but when there are more locations, the average value includes not only the location with the relatively smallest average value but also the next smallest location. It may be a step of specifying a plurality of higher-order points as a mixed place of groundwater and sewage in ascending order. Similarly, the inflow location specifying step S209 may be a step of specifying a plurality of higher-order locations as locations where rainwater and sewage are mixed in descending order of standard deviation values. In addition, the inflow location specifying step S208 considers not only the average value but also the standard deviation value, and excludes the upper multiple points having a larger standard deviation value from the upper multiple points having a relatively small average value. It may be a step of identifying a mixing point of sewage.

  The above unknown water inflow location identifying method is a method of relatively comparing water quality data in the sewage pipes 1a at points A, B, and C. Point C is a standard point, and the water quality data is referred to as reference water quality data, respectively. Positioning and comparing each water quality data of the points A and B with the reference water quality data, it is also possible to identify whether or not it is an unknown water inflow point. In that case, the 1st comparison part 13 compares the average value and standard deviation value of the water quality data measured in each sewage pipe 1a of the points A and B with the average value and standard deviation value of the reference water quality data, respectively ( Step S207: First comparison step). As a result, the inflow location specifying unit 14 specifies the sewage pipes 1a at the points A and B that have an average value smaller than the average value of the reference water quality data as a mixed location of groundwater and sewage (step S208: inflow location specifying step). ). Moreover, the inflow location specific | specification part 14 specifies the sewage pipe 1a of the points A and B of the standard deviation value larger than the standard deviation value of reference | standard water quality data as a mixing location of rainwater and sewage (step S209: inflow location specification step). . In this case, both the points A and B are specified as a mixing point of groundwater and sewage and a mixing point of rainwater and sewage. In order to perform more accurate identification in consideration of the difference between the standard deviation values of the point A and the point B, it is preferable to employ the above-described relative comparison method or a method of comparing with the absolute reference described later.

  In addition to the relative comparison between the water quality data and the comparison with respect to the standard point, a method may be adopted in which it is determined whether or not there is an unknown water inflow point with respect to each sewage pipe 1a at the points A, B and C on the basis of absolute numerical values. . P shown in FIG. 11 is a reference average value that serves as a reference for the EC average value. Similarly, Q is a reference standard deviation value that serves as a reference for the EC standard deviation value. These values correspond to the reference water quality data. The first comparison unit 13 compares the average value and the standard deviation value of the water quality data measured at the sewage pipes 1a at the points A and B with the reference water quality data P and Q, respectively (step S207: first comparison). Step). At the point C, the EC average value is larger than the reference average value P, and the EC standard deviation value is smaller than the reference standard deviation value Q. As a result, the intersection of the EC average value and the EC standard deviation value at the point C is the lower right area in the areas 26, 27, 28, and 29 divided into four by P and Q in the graph shown in FIG. 26. On the other hand, at the point A, the EC average value is smaller than the reference average value P, and the EC standard deviation value is larger than the reference standard deviation value Q. As a result, the intersection of the EC average value and the EC standard deviation at the point A exists in the upper left area 28 in the area divided into four by P and Q in the graph shown in FIG.

  At the point B, the EC average value is smaller than the reference average value P, and the EC standard deviation value is smaller than the reference standard deviation value Q. As a result, the intersection of the EC average value and the EC standard deviation value at the point B exists in the lower left area 27 in the area divided into four by P and Q in the graph shown in FIG. The inflow location specifying unit 14 specifies the sewage pipe 1a at the point B where the EC average value is smaller than P and the EC standard deviation value is smaller than Q as a mixed location of groundwater and sewage (step S208: inflow location specifying step). . Moreover, the inflow location specification part 14 specifies the sewage pipe 1a of the point A whose EC average value is smaller than P and whose EC standard deviation value is larger than Q as a mixing location of rainwater and sewage (Step S209: Inflow location specification) Step). In this example, there is no point belonging to the area 29. However, if such a point exists, the inflow point specifying unit 14 can specify the point as a mixed point of rainwater and sewage. A large standard deviation value means that the EC varies greatly depending on the weather, and suggests a possibility that the EC is lowered due to the inflow of rainwater.

<Third embodiment>
FIG. 12: is a schematic diagram which shows the condition which receives data from the structure of the unknown water inflow location identification apparatus which concerns on 3rd embodiment of this invention, and a water quality measuring device.

  The unknown water inflow point specifying device 30 and the water quality measuring device 4 according to the third embodiment enable transmission and reception of water quality data by wireless communication. In this embodiment, the unknown water inflow location identifying device 30 is a device that essentially has a function of identifying the location where rainwater and sewage are mixed. The water quality measuring device 4 includes a transmitter 9 and a transmitting antenna 18 as in the second embodiment. Further, the unknown water inflow point identifying device 30 includes a receiving antenna 31 for receiving water quality data transmitted from the water quality measuring device 4.

  The receiving unit 11 in the unknown water inflow point identifying device 30 is connected to the receiving antenna 31 and receives water quality data transmitted from the water quality measuring device 4. The storage unit 12 and the interface 15 have the same functions as those in the first embodiment and the second embodiment. The second comparison unit 32 sets, for each of one or a plurality of sewer pipes 1, a minimum value of water quality data (herein, EC) on a clear day and a minimum value (rainy day on a rainy day) of water quality data on a rainy day. It is a part to compare with the daily minimum). The rainwater / sewage mixed point candidate selection unit 33 selects a sewer pipe 1 having a rainy day minimum value that is not more than a predetermined ratio (for example, 80%) with respect to the sunny day minimum value as a rainwater / sewage mixed point candidate. It is. The storage unit 12 divides the ratio of the rainy day minimum value with respect to the sunny day minimum value into a plurality of stages in the sewer pipe 1 selected as the mixing point of rainwater and sewage, and assigns and stores a weighting coefficient in each division. ing. For example, the ratio of the rainy day minimum value to the sunny day minimum value is greater than 70% and 80% or less (70 to 80%), and the ratio is greater than 60% and 70% or less (60 to 70%). The storage unit 12 is divided into four stages, that is, a category in which the ratio is greater than 50% and 60% or less (a category of 50 to 60%), and a category in which the ratio is 50% or less (a category of 50% or less). The information can be stored in the memory. Further, as the weighting factor, for example, the weighting factor “1” is assigned to the 70 to 80% category, the weighting factor “2” is assigned to the 60 to 70% category, and the weighting factor “3” is assigned to the 50 to 60% category. It is preferable that the weighting factor “4” is assigned to the section of 50% or less so that the weighting factor is set to be larger as the minimum EC on the rainy day is lower than the minimum EC on the sunny day.

  The score calculation unit 34 divides the ratio of the rainy day minimum value with respect to the sunny day minimum value into a plurality of stages for each rainwater and sewage mixed point candidate, and assigns the weight coefficient assigned to each category and the frequency belonging to each category. This is the part that multiplies and adds the number multiplied in each section in all sections. For example, in a certain sewage pipe 1a, the frequency calculated by 100 × minimum EC on a rainy day / minimum EC on a clear day is 70 to 80%, and the frequency is once in the category of 60 to 70%. Assume that the frequency of belonging is twice, the frequency of belonging to the category with the same value of 50-60% is three times, and the frequency of belonging to the category with the same value of 50% or less is four times. The weighting factor is “1” for the 70-80% classification, “2” for the 60-70% classification, “3” for the 50-60% classification, and “4” for the 50% or less classification. ”Is allocated. In this case, the score calculation unit 34 performs a calculation of 1 time × weighting coefficient 1 + 2 times × weighting coefficient 2 + 3 times × weighting coefficient 3 + 4 times × weighting coefficient 4 = 30 for the sewage pipe 1a. As a result, the score calculated for the sewage pipe 1a is 30.

  The first comparison unit 13 relatively compares the scores between the sewer pipes 1. When the reference score obtained from the reference water quality data is stored in the storage unit 12, the first comparison unit 13 compares the score of each sewer pipe 1 with the reference score. The reference score also falls within the category of reference water quality data. The inflow location specifying unit 14 specifies the predetermined number (for example, 1 or 2) of the sewer pipes 1 from the descending order of the score as a mixed location of rainwater and sewage requiring priority handling. In addition, when the reference score is used, the inflow location specifying unit 14 specifies a location having a higher score than the reference score as a mixed location of rainwater and sewage requiring priority handling.

  The second comparison unit 32, the rainwater / sewage mixed portion candidate selection unit 33, and the score calculation unit 34 can be realized by, for example, a microcomputer or a CPU. In addition, the specific hardware of the receiving part 11, the memory | storage part 12, the 1st comparison part 13, the inflow location specific | specification part 14, and the interface 15 is the same as that of 1st embodiment and 2nd embodiment.

  The unknown water inflow portion specifying device 30 may be a dedicated device for specifying the unknown water inflow portion, but can also be realized by installing a specific computer program in a general-purpose computer and executing it. The computer program in that case is preferably at least the receiving unit 11, the first comparing unit 13, the inflow point specifying unit 14, the second comparing unit 32, the rainwater / sewage mixed point candidate selecting unit 33, and the score. It is a computer program that causes each component of the calculation unit 34 to perform an operation.

  FIG. 13: is a flowchart which shows the flow of each process from the measurement of water quality to the identification of the location which should correspond preferentially in the mixing location of rainwater and sewage in the unknown water inflow location specification method which concerns on 3rd embodiment. It is. FIG. 14 is a graph showing the transition of water quality data on a clear day and the transition of water quality data for three days on a rainy day in a certain sewage pipe in the third embodiment. FIG. 15 is a table comparing the frequencies belonging to each category of the minimum value of the water quality data on a rainy day with respect to the minimum value of the water quality data on a clear day in five sewage pipes. FIG. 16 is a table for comparing scores obtained by multiplying the frequencies shown in FIG. 15 by weighting factors assigned to the respective sections in five sewage pipes.

  First, the water quality measuring device 4 is arranged inside one or a plurality of sewage pipes 1a, and water quality data for a predetermined period (for example, 3 days) which is fine weather and water quality for a predetermined period (for example, one month) which is rainy weather. Data is measured (step S301). The measurement interval can be selected as appropriate, for example, every 10 minutes. As a result, the signal detected by the sensor 5 is stored in the storage unit 7 through the control unit 6. Next, water quality data within a predetermined period is transmitted from the water quality measuring device 4 to the unknown water inflow point identifying device 30 by wireless communication (step S302). The receiving unit 11 of the unknown water inflow point identifying device 30 receives water quality data from the water quality measuring instrument 4 side (step S303: reception step). Next, the memory | storage part 12 of the unknown water inflow location identification apparatus 30 memorize | stores the received water quality data (step S304). The memory | storage part 12 can also memorize | store the water quality data within the predetermined period of a fine day beforehand. The water quality data on a sunny day may be water quality data for only one sunny day, but is preferably the average of the transition of water quality data on a clear day for a plurality of days (for example, 3 days). When the storage unit 12 has already stored water quality data on a sunny day in the sewage pipe 1a to be measured, the above step S301 is a step of measuring water quality data for a predetermined period of rainy weather, and step S302. To Step S304 are steps for transmitting, receiving, and storing the measured water quality data.

  Here, it demonstrates by the example which measures EC in the sewage pipe 1a of five or more places. By the processing up to step S304, the unknown water inflow point specifying device 30 acquires the transition of the water quality data shown in the graph of FIG. 14 for each of the survey points. In the water quality data, the line (dotted line) indicating the time transition of water quality data on a clear day in FIG. 14 is a line obtained by averaging the transition of water quality data on a clear day for 3 days. This is a benchmark used for comparison with water quality data on the rainy day of the sewage pipe 1a. The three lines (solid lines) in FIG. 14 show the time transition of water quality data on rainy days for three days (regardless of whether they are three consecutive days or different days). Even if it sees the line of any day, EC rainy day minimum shows 80% or less with respect to EC sunny day minimum. Here, the sewage pipe 1a that has become 80% or less even in one day is set as the sewage pipe 1a that should be suspected as a mixed portion of rainwater and sewage. FIG. 14 illustrates only the temporal transition of water quality data on a clear day and the temporal transition of water quality data on three days of rain for one survey point, but in reality, all the surveys are performed by the processing up to step S304. Water quality data on rainy days is obtained for each location.

  The second comparison unit 32 compares the sunny day minimum value and the rainy day minimum value for each sewage pipe 1a (step S305: second comparison step). Subsequently, the rainwater / sewage mixed point candidate selection unit 33 selects the sewage pipe 1a having a rainy day minimum value of 80% or less of the sunny day minimum value as a rainwater / sewage mixed point candidate (step S306: Rainwater / sewage mixed point candidate selection step). As a result, it is assumed that five out of a large number of survey points are selected as candidates for a portion suspected of being mixed with rainwater and sewage. FIG. 15 is a table comparing the survey results at the five survey points. Only the table shown in FIG. 15 makes it difficult to determine which survey points should be preferentially repaired or conducted a more detailed survey. For this reason, following step S306, the score calculation unit 34 reads out the weighting factor in the storage unit 12 based on the data shown in FIG. Multiply by the frequency belonging to each category and add the number multiplied by each category for all categories to calculate the score (step S307: score calculation step). Next, the 1st comparison part 13 compares a score with each sewage pipe 1a of the survey points 1-5 (step S308: 1st comparison step). FIG. 16 is a table comparing the scores at the five survey points and the priority order to be dealt with in addition to the weighting factors at each stage. As shown in FIG. 16, the survey point with the highest priority is the survey point 3 with the highest score. Subsequently, the rankings that need to be handled are the survey point 1, the survey point 4, the survey point 2, It becomes survey point 5. The inflow location specifying unit 14 specifies a predetermined number (for example, 1 or 2) of the sewage pipes 1a from the descending order of the score as a mixing location of rainwater and sewage requiring priority correspondence (step S309: inflow location specification). Step).

  The above unknown water inflow location identification method is a method in which the scores calculated based on the water quality data in the sewage pipes 1a at the survey locations 1 to 5 are relatively compared, but based on the reference score and each water quality data The calculated score can be compared to specify the location where rainwater and sewage require priority handling. In that case, the first comparison unit 13 compares the reference score (for example, “40”) with the score calculated based on each water quality data (step S308: first comparison step), and the inflow point specifying unit 14 Then, each sewage pipe 1a at a survey point having a larger score than the reference score (in the example shown in FIG. 16, survey point 3 and survey point 1) is identified as a mixed location of rainwater and sewage requiring priority handling (step S309). : Inflow point identification step).

<Fourth embodiment>
FIG. 17: is a schematic diagram which shows the condition which receives data from the structure of the unknown water inflow location identification apparatus which concerns on 4th embodiment of this invention, and a water quality measuring device.

  The unknown water inflow point specifying device 40 and the water quality measuring device 4 according to the fourth embodiment enable transmission and reception of water quality data through wireless communication. In this embodiment, the unknown water inflow location specifying device 40 is a device that has a function of specifying the location where groundwater and sewage are mixed. The water quality measuring device 4 includes a transmitter 9 and a transmitting antenna 18 as in the second embodiment and the third embodiment. Further, the unknown water inflow point identifying device 40 includes a receiving antenna 41 for receiving water quality data transmitted from the water quality measuring device 4.

  The receiving unit 11 in the unknown water inflow point identifying device 40 is a part that is connected to the receiving antenna 41 and receives the water quality data transmitted from the water quality measuring device 4. The storage unit 12 and the interface 15 have the same functions as those in the first embodiment, the second embodiment, and the third embodiment. The water quality data selection unit 42 is a part that selects at least one of an average value or an extreme value of water quality data on a clear day in one or more sewer pipes 1. Here, the extreme value means a minimum value and a maximum value. The first comparison unit 13 is a part that compares the average values or the extreme values in the plurality of sewer pipes 1. When the reference water quality data is stored in the storage unit 12, the first comparison unit 13 calculates the average value or extreme value of one or more sewer pipes 1 and the average value or extreme value of the reference water quality data, respectively. It can also be compared. The inflow location specifying unit 14 is configured to provide at least the sewer pipe 1 having the smallest average value or minimum value in the plurality of sewer pipes 1 or the sewer pipe 1 having the largest average value or maximum value to the groundwater. It is the part that identifies the mixing point of sewage. When the reference water quality data is stored in the storage unit 12 and the first comparison unit 13 performs the comparison using the reference water quality data, the inflow point specifying unit 14 sets the water quality data of one or more sewer pipes 1. The sewer pipe 1 where the average value or minimum value of the water becomes smaller than the average value or minimum value of the reference water quality data, or the sewer pipe 1 where the average value or maximum value of the reference water quality data becomes larger than the average value or maximum value of the reference water quality data. It can also be specified. Here, the sewage pipe 1 having a smaller average value or minimum value is specified as a mixed place of groundwater and sewage when a place where groundwater has infiltrated into the sewage pipe 1 that originally flows sewage is specified. is there. The inflow location specifying unit 14 includes not only the sewage pipe 1 having the smallest average value, minimum value, or maximum value but also the sewage pipe 1 having the next smallest average value, minimum value, or maximum value. The upper plurality of sewer pipes 1 to be included may be specified as a mixed portion of groundwater and sewage.

  The water quality data selection unit 42 can be realized by, for example, a microcomputer or a CPU. In addition, the specific hardware of the receiving part 11, the memory | storage part 12, the 1st comparison part 13, the inflow location specific | specification part 14, and the interface 15 is the same as that of 1st embodiment, 2nd embodiment, and 3rd embodiment. .

  The unknown water inflow point specifying device 40 may be a dedicated device for specifying the unknown water inflow point, but can also be realized by installing a specific computer program in a general-purpose computer and executing it. The computer program in that case is preferably a computer program that causes the computer to operate at least the components of the receiving unit 11, the first comparing unit 13, the inflow portion specifying unit 14, and the water quality data selecting unit 42. is there.

  FIG. 18: is a flowchart which shows the flow of each process from measurement of a water quality to specification of the mixing location of groundwater and sewage in the unknown water inflow location specification method which concerns on 4th embodiment. FIG. 19 is a graph showing a comparison of fluctuation ranges of water quality data in a plurality of sewage pipes in the fourth embodiment.

  First, the water quality measuring device 4 is arranged inside one or a plurality of sewage pipes 1a to measure water quality data for a predetermined period (for example, 7 days) in fine weather (step S401). The measurement interval can be selected as appropriate, for example, every 10 minutes. As a result, the signal detected by the sensor 5 is stored in the storage unit 7 through the control unit 6. Next, water quality data within a predetermined period in the plurality of sewage pipes 1a is transmitted by wireless communication from the water quality measuring device 4 to the unknown water inflow point specifying device 40 (step S402). The receiving unit 11 of the unknown water inflow point identifying device 40 receives water quality data from the water quality measuring instrument 4 side (step S403: reception step). Next, the memory | storage part 12 of the unknown water inflow location identification apparatus 40 memorize | stores the received water quality data (step S404).

  Here, an example will be described in which EC is measured for seven days on a clear day at five sewage pipes 1a (points A to E). By the processing up to step S404, the change in EC at points A to E can be known. The water quality data selection unit 42 selects the average value or extreme value of EC at each point (step S405: water quality data selection step). The selection may be at least one of an average value and an extreme value, but in this example, it is more preferable to select an extreme value and a minimum value. Next, the first comparison unit 13 compares the average values or extreme values of EC at each point (step S406: first comparison step). FIG. 19 shows the fluctuation range of EC obtained by measurement for 7 days at points A to E. In the fluctuation range, MAX indicates the maximum value of EC, MIN indicates the minimum value of EC, and AV indicates the average value of EC. As shown in FIG. 19, the minimum EC value at the point A is the smallest among the EC minimum values at all points. A point with the smallest EC minimum value after point A is point D. Also, the average value of EC at the point A is the smallest among the average values of the ECs at all points. A point having a small average value of EC following the point A is also a point D. The inflow point specifying unit 14 mixes ground water and sewage into a point A that shows the smallest value among the minimum or average values of EC and a point D that has the next smallest or average value. A location is identified (step S407: inflow location identification step). In step S407, only point A is identified as a mixing point of groundwater and sewage, or not only point A and point D, but also point C having the third smallest or average value is the groundwater and sewage. You may make it identify with a mixing location.

  The above unknown water inflow location identification method specifies the mixing location of groundwater and sewage by comparing the extreme values or average values of EC between measurement points, but using absolute reference water quality data You may specify the mixing point of groundwater and sewage. For example, as shown in FIG. 19, the EC value indicated by R is used as a reference for the minimum value, and the first comparison unit 13 compares the EC minimum value at each point with R (step S406: first comparison step). The points A and D that give the minimum value of EC smaller than R may be specified as a mixed point of groundwater and sewage by the inflow point specifying unit 14 (step S407: inflow point specifying step). Similarly, an EC average value reference is set, and the first comparison unit 13 compares the EC minimum value at each point with the above average value reference (step S406: first comparison step) to identify the inflow location. You may specify the point which gives the average value of EC smaller than the reference | standard of the average value by the part 14 as a mixing location of groundwater and sewage (step S407: inflow location specification step). In that case, the memory | storage part 12 has memorize | stored the reference value of R and the average value of EC as reference | standard water quality data.

<Other embodiments>
As mentioned above, although each embodiment of the unknown water inflow location specifying device, the computer program, and the unknown water inflow location specifying method according to the present invention has been described, the present invention is implemented with various modifications without departing from the gist of the present invention. it can.

  The unknown water inflow location identifying devices 20, 30, and 40 can transmit and receive water quality data through wireless communication. A device that receives water quality data via the network may be used. When a general-purpose computer is used, computer programs for installing the computer and executing the functions of the unknown water inflow point identifying devices 10, 20, 30, 40 are CD-ROM, flexible disk, memory disk, etc. In addition to the information recording medium loaded in the computer and installed in the memory in the computer, the computer may be accessed from an external server, downloaded from the external server, and installed in a hard disk or the like inside the computer.

  The configurations and functions of the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment described above can be arbitrarily combined. For example, the unknown water inflow location specifying device 30 according to the third embodiment is a device having a function of specifying a rainwater inflow location, and the unknown water inflow location specifying device 40 according to the fourth embodiment is a function of specifying a groundwater inflow location. However, the present invention may be an unknown water inflow location identifying device having both of these functions.

  INDUSTRIAL APPLICABILITY The present invention can be used to identify an inflow point of unknown water into a sewer pipe and ancillary equipment.

1 Sewage pipe (an example)
1a Sewage pipe (subordinate concept of sewage pipe, example of location)
4 Water quality measuring device 10, 20, 30, 40 Unknown water inflow location identification device 11 Receiver 13 First comparison unit 14 Inflow location identification 22 Average value calculation unit 23 Standard deviation value calculation unit 32 Second comparison unit 33 Rainwater / sewage Candidate portion selection unit 34 Score calculation unit 42 Water quality data selection unit

Claims (13)

An unknown water inflow location identifying device for identifying an unknown water inflow location,
A receiver for receiving water quality data within a predetermined period in at least one or a plurality of locations;
A comparison of the reference water quality data used as a reference for comparison or a numerical value based on the water quality data within a predetermined period at each location or a numerical value based on the water quality data within a predetermined period at each location, or a numerical value based on the first A comparison unit;
An inflow point specifying part for specifying an inflow point of unknown water based on the result of the first comparison part,
With
The inflow location identification unit is a mixture of groundwater and sewage on a condition that it deviates from the reference water quality data or the numerical value based on it or is relatively deviated from the water quality data of the other location or the numerical value based on it in clear weather. Rainwater and sewage on the condition that it deviates from the above-mentioned reference water quality data or numerical values based on it, or relatively deviates from the above-mentioned water quality data of other above-mentioned positions or numerical values based on it in rainy weather An unidentified water inflow point identifying device characterized in that it executes at least one of the functions for identifying a mixed point. An average value calculating unit for calculating an average value of the water quality data within a predetermined period measured for each of the one or a plurality of locations;
A standard deviation value calculating unit that calculates a standard deviation value of the water quality data within a predetermined period measured for each of the one or a plurality of locations;
With
The first comparison unit compares the average value and the standard deviation value of the water quality data at each location with each other or with the average value and standard deviation value of the reference water quality data,
The inflow point specifying unit is configured to place at least a part where the average value is relatively small or large between the parts, or at least a part where the average value is smaller or larger than an average value of the reference water quality data. And a location where the standard deviation value is relatively large between the locations, or a location where the standard deviation value is larger than the standard deviation value of the reference water quality data. The unidentified water inflow point identifying device according to claim 1, wherein the unidentified water inflow point identifying device is specified as a mixed point of sewage. A second comparison unit that compares, for each of the one or more locations, the clear day minimum value of the water quality data on a clear day and the rainy day minimum value of the water quality data on a rainy day;
A rainwater / sewage mixed point candidate selection unit for selecting a rainy day / sewage mixed point candidate as a rainy day / sewage mixed point candidate with a predetermined ratio or less with respect to the sunny day minimum value;
For each of the above-mentioned rainwater and sewage mixture point candidates, the ratio of the rainy day minimum value to the sunny day minimum value is divided into multiple stages and multiplied by the weighting factor assigned to each category and the frequency belonging to each category. A score calculation unit that adds the numbers multiplied in each category in all categories;
With
The first comparison unit is compared with each other or with a reference score of the reference water quality data,
The inflow location specifying unit specifies a predetermined number of locations from the descending order of the score, or a location where the score is higher than the reference score, as a location where the rainwater and sewage need to be prioritized. The unknown water inflow location specifying device according to claim 1, wherein: A water quality data selection unit that selects at least one of an average value or an extreme value of the water quality data on a sunny day at the one or more locations;
The first comparison unit compares the average value or the extreme values of a plurality of the locations, or the average value or the extreme value of the reference water quality data,
The inflow location specifying unit is at least a location where the minimum value of the average value or the extreme value is the smallest or a plurality of locations relative to each other or in comparison with the reference water quality data. The location where the maximum value of the average value or the extreme value is the largest in comparison with the reference water quality data relative to each other is specified as the mixing location of the groundwater and sewage. The unknown water inflow location identification device according to 1.   The unknown water inflow location specifying device according to any one of claims 1 to 4, further comprising a water quality measuring device for measuring the water quality data. A computer program capable of causing the computer to function as an unknown water inflow point specifying device for specifying an unknown water inflow point by installing and executing on a computer,
For the above computer
A receiving unit for receiving water quality data within a predetermined period in at least one or a plurality of locations;
A comparison of the reference water quality data used as a reference for comparison or a numerical value based on the water quality data within a predetermined period at each location or a numerical value based on the water quality data within a predetermined period at each location, or a numerical value based on the first Comparison part;
An inflow point specifying unit that specifies an inflow point of unknown water based on the result of the first comparison unit, and in a fine weather, deviates from the reference water quality data or a numerical value based on the reference water quality data or relatively the other points of the above A function that identifies a mixed location of groundwater and sewage on the condition that it deviates from water quality data or numerical values based on it, and in rainy weather, it deviates from the reference water quality data or numerical values based on it, or is relatively other An inflow point specifying unit that executes at least one of the functions of specifying a mixed point of rainwater and sewage on the condition that it deviates from the above water quality data or a numerical value based thereon;
A computer program for causing each of the components to operate. Against the computer,
An average value calculation unit that calculates an average value of the water quality data within a predetermined period measured for each of the one or a plurality of locations;
A standard deviation value calculation unit for calculating a standard deviation value of the water quality data within a predetermined period measured for each of the one or a plurality of locations;
While performing the operation of each component of
As the operation of the first comparison unit, the average value and the standard deviation value of the water quality data at each location are compared with each other or with the average value and standard deviation value of the reference water quality data,
As an operation of the inflow location specifying unit, at least a location where the average value is relatively small or large between the locations, or at least a location where the average value is smaller or larger than the average value of the reference water quality data Identify the mixed location of the groundwater and sewage, the location where the standard deviation value is relatively large between the locations, or the location where the standard deviation value is larger than the standard deviation value of the reference water quality data The computer program according to claim 6, wherein the computer program identifies a location where rainwater and sewage are mixed. Against the computer,
A second comparison unit that compares, for each of the one or more locations, a clear day minimum value of the water quality data on a clear day and a rainy day minimum value of the water quality data on a rainy day;
A rainwater / sewage mixed point candidate selection unit that selects a rainwater / sewage mixed point candidate that has the rainy day minimum value equal to or less than a predetermined ratio with respect to the clear day minimum value;
For each of the above-mentioned rainwater and sewage mixture point candidates, the ratio of the rainy day minimum value to the sunny day minimum value is divided into multiple stages and multiplied by the weighting factor assigned to each category and the frequency belonging to each category. And a score calculation unit for adding the numbers multiplied in each of the above categories in all categories;
While performing the operation of each component of
As the operation of the first comparison unit, between each location or compared with the reference score of the reference water quality data,
As an operation of the inflow location specifying unit, a predetermined number of locations from the descending order of the score, or a location where the score is higher than the reference score is specified as a mixed location of the rainwater and sewage requiring priority handling. The computer program according to claim 6. Against the computer,
While performing the operation of the water quality data selection unit that selects at least one of the average value or the extreme value of the water quality data on a sunny day in the one or more places,
As the operation of the first comparison unit, comparing the average values of the plurality of places or the extreme values, or the average value or the extreme value of the reference water quality data,
As the operation of the inflow location specifying unit, at least a location where the average value or the minimum value of the extreme values is the smallest in comparison with the reference water quality data relative to the locations or a plurality of locations. The location where the average value or the maximum value of the extreme values is the largest in comparison between the locations or in comparison with the reference water quality data is specified as the mixing location of the groundwater and sewage. The computer program according to claim 6. An unknown water inflow location identification method for identifying an unknown water inflow location,
A reception step of receiving water quality data within a predetermined period in at least one or a plurality of locations in a device for identifying an inflow location of unknown water from a water quality measuring device;
In the above device,
A comparison of the reference water quality data used as a reference for comparison or a numerical value based on the water quality data within a predetermined period at each location or a numerical value based on the water quality data within a predetermined period at each location, or a numerical value based on the first A comparison step;
An inflow point specifying step for specifying an inflow point of unknown water based on the processing result of the first comparison step, and
The inflow location identifying step is a mixture of groundwater and sewage on a clear day, on the condition that it deviates from the reference water quality data or numerical values based on it or relatively deviates from the water quality data of other locations or numerical values based on it. Rainwater and sewage on the condition that it deviates from the above-mentioned reference water quality data or numerical values based on it, or relatively deviates from the above-mentioned water quality data of other above-mentioned positions or numerical values based on it in rainy weather An unknown water inflow point specifying method, wherein at least one of the functions for specifying the mixed point is executed. In the device,
An average value calculating step for calculating an average value of the measured water quality data within a predetermined period for each one or a plurality of locations;
A standard deviation value calculating step for calculating a standard deviation value of the water quality data within a predetermined period measured for each of the one or a plurality of locations, and
The first comparison step compares the average value and the standard deviation value of the water quality data at each location with each other or with the average value and standard deviation value of the reference water quality data,
In the inflow location specifying step, at least the location where the average value is relatively small or large between the locations, or at least the location where the average value is smaller or larger than the average value of the reference water quality data, And a location where the standard deviation value is relatively large between the locations, or a location where the standard deviation value is larger than the standard deviation value of the reference water quality data. It identifies with the mixing location of sewage, The unknown water inflow location identification method of Claim 10 characterized by the above-mentioned. In the device,
A second comparison step of comparing, for each of the one or more locations, a clear day minimum value of the water quality data on a clear day and a rainy day minimum value of the water quality data on a rainy day;
A rainwater / sewage mixed point candidate selection step for selecting a rainy day / sewage mixed point candidate as a rainy day / sewage mixed point candidate with a predetermined percentage or less of the sunny day minimum value;
For each of the above-mentioned rainwater and sewage mixture point candidates, the ratio of the rainy day minimum value to the sunny day minimum value is divided into multiple stages and multiplied by the weighting factor assigned to each category and the frequency belonging to each category. And a score calculation step of adding the number multiplied by each of the above categories in all categories,
The first comparison step is performed by comparing each location or with a reference score of the reference water quality data,
The inflow location specifying step specifies a predetermined number of locations from the descending order of the score, or a location where the score is higher than the reference score as a location where the rainwater and sewage need to be prioritized. The method for identifying an unknown water inflow portion according to claim 10. In the device,
A water quality data selection step of selecting at least one of an average value or an extreme value of the water quality data on a sunny day at the one or more locations;
In the first comparison step, the average values of the plurality of places or the extreme values, or the average value or the extreme values of the reference water quality data,
The inflow location specifying step includes at least a location where the average value or the minimum value of the extreme values is the smallest or a plurality of the locations relative to each other or in comparison with the reference water quality data. The location where the maximum value of the average value or the extreme value is the largest in comparison with the reference water quality data relative to each other is specified as the mixing location of the groundwater and sewage. 10. The unknown water inflow portion identification method according to 10.

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