JP2019100729A - Information presentation system, information presentation method, and program - Google Patents

Abstract

To provide an information presentation system with which it is possible to present a repair plan that corresponds to a damage state pertaining to a piping in which leakage is detected.SOLUTION: Provided is an information presentation system comprising: a leakage detection device for receiving first detection signals collected by a plurality of first sensors installed in a piping included in a pipeline network to be examined, analyzing the received first detection signals by correlation processing and determining the presence of leakage in the piping, specifying a leakage position when leakage is detected in the piping, and outputting a detection result that includes at least the specified leakage position; and a repair plan presentation device for receiving second detection signals acquired by a plurality of second sensors installed on the basis of the detection result generated by the leakage detection device, estimating the damage state of the piping using the received second signals, setting at least one repair plan on the basis of the estimated damage state, and outputting the set repair plan.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an information presentation system, an information presentation method, and a program for presenting a repair plan for piping in which a leak has occurred.

  In order to maintain the social infrastructure equipment, it is important to detect and repair the equipment's aging, failure, abnormalities, etc. at an early stage. It is effective to always monitor the equipment to be surveyed by sensors or to conduct periodic surveys for early detection of failures and abnormalities in infrastructure equipment. For example, there are infrastructures such as roads and land bridges, piping such as gas pipes and water pipes buried in the ground, and equipment laid outdoors such as electric wires wired on the ground or underground. Among such infrastructure facilities, there are facilities such as gas and water pipes buried in the ground that can not be monitored or surveyed directly from the ground.

  With regard to infrastructure equipment that can not be monitored or surveyed directly from the ground, a camera in the pipe can be inserted into the pipe to directly investigate the leaked state of the pipe. However, the in-tube insertion camera is not suitable for planning and examining a large pipeline because of the high cost and the long time required for the survey due to the narrow survey range.

  In the case of a water pipe, it is possible to install a sensor on a valve plug that can be accessed directly, such as a fire hydrant or an air valve, and to monitor or investigate a buried portion that can not be directly accessed. For example, the sensors installed at the two valve plugs at positions across the section to be surveyed detect the vibration or water pressure signal propagating through the section to be surveyed between valve plugs, and the presence or absence of leakage or the like from the similarity of the signals The leak condition of piping can be indirectly investigated by the correlation method which detects a position. However, although it is possible to detect the presence or absence and location of leakage in general leakage surveys using the correlation method, it is unknown about the leakage flow rate and damage situation at the leakage location until the excavation survey, so time for repair after excavation And costs.

  Patent Document 1 discloses a water leakage investigation plan using a water leakage cost from prediction model information that predicts the transition of the amount of water leakage in an area based on at least one of the amount of water leakage information, pipe line information, and survey and repair information. It is disclosed about the water leak investigation plan drafting method which drafts.

Unexamined-Japanese-Patent No. 2015-094665

  According to the method of Patent Document 1, it is possible to formulate a cost-effective leak detection plan under limited resources, even when there is uncertainty regarding leaks. However, in the method of Patent Document 1, the model information for predicting the damage situation does not consider the damage state of the water pipe, so it is not possible to accurately predict the leak damage situation. For example, even if the amount of leakage is equal, the area of the leakage hole is not necessarily the same. Therefore, in the method of Patent Document 1, when water pressure becomes high, it is predicted that water may excessively leak from a large area water leakage hole, or a pipe may rupture and a secondary damage may occur. I can not

  An object of the present invention is to provide an information presentation system capable of presenting a repair plan according to a damage situation regarding piping in which a leak is detected, in order to solve the above-mentioned problems.

  The information presentation system of the present invention receives the first detection signals collected by the plurality of first sensors installed in the piping included in the pipeline network to be investigated, and analyzes the received first detection signals by correlation processing And a leak detection device that determines the presence or absence of a leak in the pipe, identifies the leak position when the leak is detected in the pipe, and outputs a detection result including at least the identified leak position; The second detection signal acquired by the plurality of second sensors installed based on the detection result is received, the damage condition of the pipe is estimated using the received second detection signal, and at least the estimated damage condition is calculated. A repair plan presentation device is provided which sets one repair plan and outputs the set repair plan.

  In the information presentation method of the present invention, the first detection signal collected by the plurality of first sensors installed in the pipe to be investigated is received, the received first detection signal is analyzed by correlation processing, and leakage in the pipe is detected. If the leak is detected in the piping, the leak position is identified, and the detection result including at least the identified leak position is output, and the plurality of second sensors installed based on the output detection result Receiving the second detection signal acquired by the control unit, estimating the damage status of the piping using the received second detection signal, setting at least one repair plan based on the estimated damage status, and setting the repair plan Information presentation method to output.

  A program according to the present invention includes a process of receiving a first detection signal collected by a plurality of first sensors installed in a pipe to be investigated, a process of analyzing the received first detection signal by a correlation process, and A process of determining the presence or absence of a leak, a process of identifying a leak position when a leak is detected in piping, a process of outputting a detection result including at least the identified leak position, and installation based on the output detection result Processing for receiving the second detection signal acquired by the plurality of second sensors, processing for estimating the damage condition of the piping using the received second detection signal, and at least one of the estimated damage conditions. The computer is made to execute a process of setting a repair plan and a process of outputting the set repair plan.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the information presentation system which can present the repair plan according to the damage condition regarding piping in which the leak was detected.

It is a block diagram showing composition of an information presentation system concerning an embodiment of the present invention. It is a conceptual diagram which shows the example of installation of the 1st sensor contained in the 1st sensor group connected to the information presentation system which concerns on embodiment of this invention. It is a conceptual diagram which shows the example of installation of the 2nd sensor contained in the 2nd sensor group connected to the information presentation system which concerns on embodiment of this invention. It is a block diagram showing composition of a leak detection apparatus with which an information presentation system concerning an embodiment of the present invention is provided. It is a block diagram showing composition of a repair bill presentation device with which an information presentation system concerning an embodiment of the present invention is provided. It is a conceptual diagram which shows the example which the leak hole generate | occur | produced in piping which is investigation object of the information presentation system which concerns on embodiment of this invention. It is a graph which shows an example of the cross correlation function used in order to determine whether leak has generate | occur | produced in piping which is investigation object of the information presentation system which concerns on embodiment of this invention. It is a conceptual diagram for demonstrating the example which confirms the damage condition of the leakage hole which generate | occur | produced in piping which is the investigation object of the information presentation system which concerns on embodiment of this invention. It is a conceptual diagram for demonstrating the example which calculates the area of a leak hole by the repair plan presentation apparatus with which the information presentation system which concerns on embodiment of this invention is provided. It is a conceptual diagram for explaining the example of a display of the information which the information presentation system concerning an embodiment of the present invention presents. It is a conceptual diagram for demonstrating another example of a display of the information which the information presentation system concerning an embodiment of the present invention presents. It is a flowchart for demonstrating the operation | movement of the information presentation system which concerns on embodiment of this invention. It is a block diagram showing an example of hardware constitutions of an information presentation system concerning an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments described below are technically preferable limitations for carrying out the present invention, but the scope of the invention is not limited to the following. In all the drawings used in the following description of the embodiment, the same reference numerals are given to the same parts unless there is a particular reason. In the following embodiments, the same configuration and operation may not be repeatedly described. Further, the direction of the arrow in the drawing shows an example, and does not limit the direction of the signal between the blocks.

(Embodiment)
First, the configuration of an information presentation system according to an embodiment will be described with reference to the drawings. The information presentation system of the present embodiment detects a leak of piping by using data collected by a sensor installed at an access point such as a valve plug of piping such as a water pipe or a gas pipe. And if the information presentation system of this embodiment detects the leak of piping, it will estimate the damage condition of piping, and will show the repair method based on the estimated damage condition.

(Constitution)
FIG. 1 is a block diagram showing a schematic configuration of the information presentation system 1 of the present embodiment. FIG. 2 is a conceptual diagram showing an example of the connection relationship between the piping 120 to be inspected of the information presentation system 1 and the information presentation system 1 at normal times. FIG. 3 is a conceptual diagram showing an example of the connection relationship between the piping 120 to be inspected of the information presentation system 1 and the information presentation system 1 when the leakage point is detected and a repair method plan for the leakage point is estimated.

  The piping 120 is one of the social infrastructure equipment such as a water pipe, a sewage pipe, and a gas pipe, and is installed underground. Although a water pipe is mentioned as an example and explained as piping 120 below, a social infrastructure installation of an inspection object of information presentation system 1 is not limited to a water pipe.

  Generally, in a manhole of a water pipe, a point (also referred to as an access point) for accessing the inside of a facility, such as a fire hydrant, an air valve, a valve leaflet, etc., is laid. It is assumed that at least one access point 121 is installed in the pipe 120. The access point 121 is not limited in its form as long as it is directly connected to the social infrastructure to be inspected. The distance between adjacent access points 121 is stored in advance in the information presentation system 1.

  As shown in FIG. 1, the information presentation system 1 includes a leak detection device 10 and a repair plan presentation device 20. In addition, the information presentation system 1 is connected to the first sensor group 100, the second sensor group 200, and the display device 40. The display device 40 may be included in the components of the information presentation system 1. Further, the leak detection device 10 may be configured outside the information presentation system 1, and only the repair plan presentation device 20 may be included in the information presentation system 1.

  As shown in FIG. 2, the first sensor 110 is installed at the access point 121 of the pipe 120. It is preferable that the first sensor 110 be permanently installed in each access point 121. The first sensor group 100 is configured of a plurality of first sensors 110 installed in a plurality of access points 121. The first sensor 110 includes a detector 111 (also referred to as a first detector) and a data logger 112. The sensing data acquired by the detector 111 is collected by the data logger 112 and transmitted to the information presentation system 1 via the network 400. In FIG. 2, the interface connecting the first sensor 110 and the network 400 is omitted. Further, in FIG. 2, the same reference numerals are given to different access points 121, first sensors 110, detectors 111, and data loggers 112.

  In the present embodiment, the first sensor 110 collects data acquired by the detector 111 that measures at least one of the water pressure of the fluid flowing inside the pipe 120 and the vibration propagating in the pipe 120 and the data acquired by the detector 111 And a data logger 112. The object to be detected by the first sensor 110 is not limited to the water pressure or the vibration as long as the abnormality of the pipe 120 can be detected.

  For example, the first sensor 110 can be realized by a vibration sensor. There is no particular limitation on the vibration detection method by the vibration sensor, but a piezoelectric method, a capacitance method, or the like can be applied. Also, for example, the first sensor 110 can be realized by a water pressure sensor. In particular, a water pressure sensor capable of measuring a high frequency of about 10 kHz is suitable for the first sensor 110. According to the water pressure sensor, since the signal propagating directly through the pipe 120 is measured as the leaked vibration, it can be detected in a long distance. However, the water pressure sensor can not be installed on a gate valve or the like because it needs access to the mouth of the fire hydrant.

  The signal acquired by the first sensor 110 is recorded in the data logger 112. It is desirable that the acquisition timing of the data by the data logger 112 installed in each access point 121 be synchronized in time among the plurality of access points 121. For example, the plurality of data loggers 112 may be time synchronized regardless of wired or wireless, and the method is not limited. For example, in the case of a wireless method, a method of receiving a radio signal from a GPS (Global Positioning System) satellite can be applied. In order to perform time synchronization with higher accuracy, an internal clock with high accuracy may be installed inside the data logger 112 for synchronization. For example, the data logger 112 records the signal of the detector 111 in time series at a specified sampling interval. The sampling frequency band in which the data logger 112 acquires the signal of the detector 111 is preferably a frequency band up to about 5 kHz, but there is no particular limitation on the frequency range.

  As shown in FIG. 3, when a leaked portion is detected in the pipe 120, the second sensor 210 is installed in each of at least two access points 121 located at positions sandwiching the detected leaked hole 140. The second sensor group 200 is configured by a plurality of second sensors 210 installed in a plurality of access points 121. Although the first sensor 110 is removed from the access point 121 in FIG. 3, the second sensor 210 may be installed in the access point 121 with the first sensor 110 installed.

  In the present embodiment, the second sensor 210 measures a water pressure sensor 211 (also referred to as a second detector) that measures the water pressure of the fluid flowing inside the pipe 120 and a flow rate that measures the flow rate of the fluid flowing inside the pipe 120 And a sensor 212 (also referred to as a third detector). Sensing data acquired by the water pressure sensor 211 and the flow rate sensor 212 are transmitted to the information presentation system 1 via the network 400. In FIG. 3, an interface connecting the second sensor 210 and the network 400 is omitted. Further, in FIG. 3, the same reference numerals are given to the different access points 121, the second sensor 210, the water pressure sensor 211, and the flow rate sensor 212.

  The measurement method of the water pressure sensor 211 is not particularly limited as long as it can measure the hydrostatic pressure. The flow rate sensor 212 may be an insertion type or a non-invasive ultrasonic flow rate type, and the measurement method is not particularly limited. In addition, it is desirable that the flow rate be measured at night when the frequency of use is low, in order to separate it from the use of domestic water where the piping is connected, but the measurement time zone is not limited. For example, when the flow rate is measured at night when the frequency of use is low, the flow rate at which the flow rate is the lowest at night may be used as a measurement value (also referred to as a nighttime minimum flow rate).

  The leak detection device 10 is connected to a first sensor group 100 always installed at the access point 121 of the pipe 120. The leak detection apparatus 10 receives a signal related to data acquired by the detector 111 from the first sensor 110 as a first detection signal. The leak detection apparatus 10 analyzes data received from the first sensor 110 constituting the first sensor group 100 and detects a leak of the pipe 120. In the present embodiment, the leak detection apparatus 10 estimates the leak position using a cross correlation function. When the leak detection device 10 detects a leak in the pipe 120, the leak detection device 10 outputs the occurrence of the leak and the leak position to the display device 40, and causes the display device 40 to display the occurrence of the leak and the leak position.

  That is, the leak detection apparatus 10 receives the first detection signals collected by the plurality of first sensors 110 installed in the piping 120 included in the pipeline network to be investigated, and correlates the received first detection signals. It analyzes according to and determines the presence or absence of the leak in the piping 120. FIG. When the leak detection device 10 detects a leak in the pipe 120, the leak detection device 10 identifies a leak position, and outputs a detection result including at least the identified leak position to the display device 40.

  The repair plan presentation device 20 is connected to the second sensor group 200. The repair plan presentation device 20 receives, from the second sensor group 200 installed at two access points sandwiching the leak position, the pressure and the flow rate of the fluid flowing inside the pipe 120 at the access points. In other words, the repair plan presentation device 20 receives a signal related to the data acquired by the water pressure sensor 211 and the flow rate sensor 212 from the second sensor 210 constituting the second sensor group 200 as a second detection signal. The repair plan presentation device 20 uses the pressure and the flow rate of the fluid flowing inside the pipe 120 to estimate the state of leakage of the pipe 120 (hereinafter also referred to as a damage state). Specifically, upon acquiring the pressure and the flow rate of the fluid in the piping, the repair plan presentation device 20 calculates an opening area of a portion (also referred to as a leak hole) where a leak occurs.

  The repair plan presentation device 20 estimates the damage status of the target site based on the calculated area of the leaked hole. The repair plan presentation device 20 selects the repair construction plan of the target site based on the estimated damage situation of the target site, and calculates the cost (also referred to as the repair construction cost) of the selected repair construction plan. The repair plan presentation device 20 outputs the selected repair construction plan and the repair construction cost to the display device 40, and causes the display 40 to display the selected repair construction plan and the repair construction cost.

  That is, the repair plan presentation device 20 receives the second detection signal acquired by the plurality of second sensors 210 installed based on the detection result generated by the leak detection device 10, and receives the received second detection signal. The damage situation of the piping 120 is estimated using. The repair plan presentation device 20 sets at least one repair plan based on the estimated damage situation, and outputs the set repair plan to the display unit 40.

  The above is the description of the schematic configuration of the information presentation system 1 of the present embodiment. Then, the component of the information presentation system 1 of this embodiment is demonstrated in detail, referring drawings.

[Leakage detection device]
FIG. 4 is a block diagram showing the configuration of the leak detection apparatus 10. As shown in FIG. As illustrated in FIG. 4, the leak detection device 10 includes a first measurement information acquisition unit 11, a first measurement information storage unit 12, a correlation processing unit 13, and a correlation result output unit 14.

  The first measurement information acquisition unit 11 (also referred to as a first measurement information acquisition unit) is connected to the first sensor group 100 via the network 400 and is connected to the first measurement information storage unit 12. In FIG. 4, the network 400 is omitted. The first measurement information acquisition unit 11 acquires data (also referred to as a first detection signal) from the first sensor 110 installed at each access point 121 of the pipe 120. In other words, the first measurement information acquisition unit 11 receives data collected by the plurality of first sensors 110 installed for each of the plurality of access points 121 installed in the pipe 120. The acquisition timing of data by the first measurement information acquisition unit 11 is arbitrarily set. For example, the first measurement information acquisition unit 11 may receive data at a timing set at a predetermined time interval. For example, the first measurement information acquisition unit 11 may receive data at timing when the volume of data accumulated in the data logger 112 exceeds a predetermined threshold.

  The first measurement information storage unit 12 (also referred to as a first measurement information storage unit) is connected to the first measurement information acquisition unit 11 and the correlation processing unit 13. The first measurement information storage unit 12 stores data received by the first measurement information acquisition unit 11. Further, the first measurement information storage unit 12 acquires the data stored therein by the correlation processing unit 13.

The correlation processing unit 13 (also referred to as correlation processing means) is connected to the first measurement information storage unit 12 and the correlation result output unit 14. The correlation processing unit 13 acquires data stored in the first measurement information storage unit 12 and performs correlation processing using the acquired data. In other words,
The correlation processing unit 13 analyzes the data stored in the first measurement information storage unit 12 by correlation processing to generate a cross correlation function, and determines the presence or absence of leakage in the pipe 120 based on the generated cross correlation function. . When the correlation processing unit 13 detects a leak in the pipe 120, the correlation processing unit 13 specifies the leak position based on the generated cross correlation function. The correlation processing unit 13 outputs the correlation result (also referred to as a detection result) obtained by the correlation processing to the correlation result output unit 14. For example, the correlation result is information indicating at which position of the pipe 120 a leak point has occurred. For example, the correlation result is information including position information and identification information of two access points 121 sandwiching the portion where the leaked portion has occurred.

  The correlation result output unit 14 (also referred to as a correlation result output unit) is connected to the correlation processing unit 13 and to the display device 40. When acquiring the correlation result from the correlation processing unit 13, the correlation result output unit 14 outputs the acquired correlation result to the display device 40. The correlation result output to the display device 40 is displayed on a display unit (not shown) of the display device 40.

  For example, when the leaked portion is not detected in the pipe 120, the correlation result output unit 14 outputs, to the display device 40, information indicating that the leak is not detected. Further, for example, when a leaked portion is detected in the pipe 120, the correlation result output unit 14 outputs, to the display device 40, a correlation result including at least the leaked position specified by the correlation processing unit 13. When a leaked portion is detected in the pipe 120, the correlation result output unit 14 may output, to the display device 40, information indicating that a leak has occurred and information on the leak position.

  The above is the description of the leak detection device 10.

[Repair plan presentation device]
FIG. 5 is a block diagram showing the configuration of the repair plan presentation device 20. As shown in FIG. The repair plan presentation device 20 includes a second measurement information acquisition unit 21, a second measurement information storage unit 22, a leaked hole area calculation unit 23, a conduit information storage unit 24, a damage situation estimation unit 25, a repair information storage unit 26, and repair A plan setting unit 27 and a repair plan output unit 28 are provided.

  The second measurement information acquisition unit 21 (also referred to as a second measurement information acquisition unit) is connected to the second sensor group 200 via the network 400 and is connected to the second measurement information storage unit 22. In FIG. 5, the network 400 is omitted. The second measurement information acquisition unit 21 acquires data (also referred to as a second detection signal) from the second sensor 210 installed at each access point 121 of the pipe 120. In other words, the second measurement information acquisition unit 21 receives the data acquired by the plurality of second sensors 210 installed for each of the at least two access points 121 in a relation sandwiching the leakage position. The acquisition timing of the data by the second measurement information acquisition unit 21 is arbitrarily set. For example, the second measurement information acquisition unit 21 may receive data at the timing when the connection with the second sensor 210 is established.

  The second measurement information storage unit 22 (also referred to as a second measurement information storage unit) is connected to the second measurement information acquisition unit 21 and the leak hole area calculation unit 23. Data acquired by the second measurement information acquisition unit 21 is stored in the second measurement information storage unit 22. In addition, the second measurement information storage unit 22 acquires the data stored therein by the leak hole area calculation unit 23.

  The leakage hole area calculation unit 23 (also referred to as a leakage hole area calculation unit) is connected to the second measurement information storage unit 22 and the damage condition estimation unit 25. The leakage hole area calculation unit 23 acquires the data stored in the second measurement information storage unit 22 and calculates the area of the leakage hole 140 using the acquired data. The leaked hole area calculation unit 23 outputs information on the calculated area and leak position of the leaked hole 140 to the damage situation estimation unit 25.

  The conduit information storage unit 24 (also referred to as conduit information storage means) is connected to the damage situation estimation unit 25. For example, pipe information such as a pipe type and a diameter of the pipe 120 at the position of each access point 121 is stored in the pipe information storage unit 24. For example, more specifically, in the pipe line information storage unit 24, the year of embedding of the pipe 120, the pipe type such as ductile cast iron pipe or cast iron pipe, the specification or joint of the pipe, the earthquake resistant pipe or the human-hole T-shaped pipe Information such as structural information such as piping bends and branches, and overturns are stored. The pipeline information storage unit 24 and the pipeline information storage unit 24 also include specifications such as a fire hydrant, an air valve, and a gate valve as the access point 121, positions, numbers, and a lead-in part with a water supply pipe, etc. May be stored as The piping information stored in the conduit information storage unit 24 is acquired by the conduit information storage unit 24.

  The damage condition estimation unit 25 (also referred to as a damage condition estimation unit) is connected to the leakage hole area calculation unit 23 and the repair plan setting unit 27. The damage state estimation unit 25 acquires information on the area of the leak hole 140 and the leak position from the leak hole area calculation unit 23. The damage state estimation unit 25 specifies the damage position based on the acquired information on the leaked position. The damage status estimation unit 25 determines whether the identified damage position is the straight pipe portion, the branch portion, the joint portion, or the like of the pipe, based on the information such as the water pressure, the amount of water leakage, and the area of the leakage hole 140 Estimate the damage situation. In other words, the damage situation estimation unit 25 refers to the pipeline information storage unit 24 to estimate the damage situation at the leakage position based on the area of the leakage hole 140 calculated by the leakage hole area calculation unit 23 and the leakage position. . The damage situation estimation unit 25 outputs the estimated damage situation to the repair plan setting unit 27.

  For example, the damage state estimation unit 25 classifies the damage state using an evaluation value obtained by multiplying the leak position, water pressure, leak amount, and leak hole area. For example, if the damage situation is classified into three to five stages according to the magnitude of the evaluation value, the damage situation is quantified and clarified. In addition, the estimation method of a damage condition is not limited to the method mentioned here.

  The repair information storage unit 26 (also referred to as a repair information storage unit) is connected to the repair plan setting unit 27. The repair information storage unit 26 stores repair information including the repair method associated with the damage status of the pipe 120 and the cost thereof. The repair method and the cost may be stored in separate storage units. The repair information stored in the repair information storage unit 26 is acquired by the repair plan setting unit 27.

  The repair plan setting unit 27 (also referred to as repair plan setting means) is connected to the damage status estimation unit 25, the repair information storage unit 26, and the repair plan output unit 28. The repair plan setting unit 27 acquires, from the damage condition estimation unit 25, the damage condition estimated by the damage condition estimation unit 25. The repair plan setting unit 27 acquires at least one repair construction method from the repair information storage unit 26 based on the acquired damage situation, and acquires the acquired cost of the repair construction method from the repair information storage unit 26. The repair plan setting unit 27 sets a repair plan using the acquired at least one repair method and the cost of the repair method. In other words, the repair plan setting unit 27 refers to the repair information storage unit 26 based on the damage situation estimated by the damage situation estimation unit 25, and includes at least a repair method of the pipe 120 and a cost spent on the repair method. Set at least one proposal. The repair plan setting unit 27 outputs the set repair plan to the repair plan output unit 28.

  For example, depending on whether the leakage position is a straight pipe portion or a joint portion, the repair plan setting unit 27 may have to replace the pipe 120, may perform simple repair with a band, or may perform joint replacement. And calculate the cost of the repair method and its repair method. The repair plan setting unit 27 determines the repair cost by collating the repair method to be presented with the pipeline information. For example, if the route can be bypassed, repair cost is low because water supply is not necessary. Further, for example, depending on the area of the leak hole 140, the repair cost can be reduced because the repair can be performed simply by attaching a patch. In addition, for example, when the pipe 120 itself is to be replaced, the repair cost becomes expensive. For example, although it is preferable that the repair plan setting unit 27 output at least three repair plans in order of cheapness, the output of the repair plan is not limited to three.

  For example, when the water pressure inside the pipe 120 is high, the area of the leakage hole 140 is small, and the amount of leakage is small, the possibility of the damage is small, so the repair plan setting unit 27 uses an inexpensive repair method such as a patch. Is selected from the repair information storage unit 26.

  For example, when the water pressure inside the pipe 120 is small, the area of the leakage hole 140 is large, and the amount of leakage is large, the amount of leakage may increase due to water pressure increase due to water hammer phenomenon or pump operation for using water. Damage such as bursting of 120 may occur. In this case, the repair plan setting unit 27 selects an expensive repair method such as replacement of the pipe 120 from the repair information storage unit 26.

  The repair plan output unit 28 (also referred to as repair plan output unit) is connected to the repair plan setting unit 27 and to the display device 40. When the repair plan output unit 28 acquires the repair plan from the repair plan setting unit 27, the repair plan output unit 28 outputs the acquired repair plan to the display device 40. The repair plan output to the display device 40 is displayed on the display unit (not shown) of the display device 40.

  The above is the description of the configuration of the repair plan presentation device 20. The repair plan presentation device 20 operates by receiving a detection signal acquired by the second sensor 210 installed for each of at least two access points 121 in a relation sandwiching the leakage position in the piping 120 in which the leakage position is specified. It may be configured as a single device. When the repair plan presentation device 20 is configured as a single device, the second sensor 210 may be referred to as a sensor, and the second detection signal may be referred to as a detection signal.

[Correlation processing]
Here, the correlation processing performed by the leak detection apparatus 10 will be described in detail with reference to the drawings. In addition, the following correlation processing is an example, Comprising: The correlation processing which the leak detection apparatus 10 of this embodiment performs is not limited.

  FIG. 6 is a conceptual view showing an example in which the leak hole 140 is generated in the pipe 120 between the access point 121A and the access point 121B. In the example of FIG. 6, it is assumed that the distance between the access point 121A and the access point 121B is L, and the leak hole 140 is generated at the distance I from the access point 121B. The data acquired by the detector 111A installed in the access point 121A is collected by the data logger 112A and transmitted to the information presentation system 1. Similarly, data acquired by the detector 111 </ b> B installed in the access point 121 </ b> B is collected by the data logger 112 </ b> B and transmitted to the information presentation system 1.

  FIG. 7 shows the cross correlation result obtained from the correlation between the signal acquired by the detector 111A installed in the access point 121A and the signal acquired by the detector 111B installed in the access point 121B. In FIG. 7, the horizontal axis indicates the arrival time difference, and the vertical axis indicates the cross correlation function. Note that, instead of the cross correlation function, the ratio of the peak of the cross correlation to dark noise outside the measurement range may be set on the vertical axis.

  The cross-correlation function increases in accordance with the presence or absence of the correlation of the similar signals of the two signals captured by the detector 111, and a peak appears in accordance with the time difference between the signals arriving at the detectors 111A and 111B. The peaks of the cross correlation function are preferably normalized but may not be normalized. The peak position of the cross correlation function corresponds to the difference in arrival time of the two signals to the sensor. The information presentation system 1 propagates on the pipe 120 and can determine the presence / absence of a leak and calculate the location of the leak by the arrival of a signal correlated due to the leak. For example, to determine the presence or absence of a leak, a threshold S may be provided to the peak obtained by the cross correlation function.

For the calculation of the leakage position, the arrival time difference dt obtained by the cross correlation function and the pipe sound velocity V _s are used. A theoretical value may be used as the pipe sound velocity V _s used to calculate the leakage position, or an actual measurement value may be used. For example, the pipe sound velocity V _s can be configured to be selected from a database of theoretical values that are known for each pipe material type and bore diameter. Also, for example, the pipe sound velocity V _s is the difference in arrival time and period of vibration propagation obtained until the vibration generated by vibrating one of the access points 121 in the section to be inspected reaches the other access point 121. It may be calculated using the distance. Further, the calculation of the leakage position I requires the distance L between the access point 121A and the access point 121B. As the distance L, either an actual measurement distance or a pipeline drawing distance may be used.

  The above is the description of the correlation process performed by the leak detection device 10. The above-described correlation processing is an example, and the correlation processing by the leak detection apparatus 10 is not limited.

[Calculation of leaked hole area]
Next, the process of calculating the area of the leak hole 140 performed by the repair plan presentation device 20 will be described with reference to the drawings.

  FIG. 8 is a conceptual diagram for explaining the investigation performed on the suspected investigation section determined to have a leak. In the example of FIG. 8, the second sensor 210A and the second sensor 210B are installed at each of the access point 121A and the access point 121B which sandwich the suspected section narrowed based on the signal acquired by the first sensor group 100. Do. The second sensor 210A includes a water pressure sensor 211A and a flow rate sensor 212A. Similarly, the second sensor 210B includes a water pressure sensor 211B and a flow rate sensor 212B.

  FIG. 9 is a conceptual diagram for describing a model for calculating the area of the leakage hole 140 using the water pressure difference and the amount of water leakage. In addition, it is an example of model arrangement for calculating the area of the leak hole 140 shown below, Comprising: The calculation method of the area of the leak hole 140 is not limited.

Water pressure sensor 211A and the flow rate sensor 212A installed in the access point 121A measures the pressure P ₁ and the flow rate to Q ₁ fluid 125 flowing through the pipe 120 at the location of the access point 121A. Similarly, water pressure sensor 211B and a flow rate sensor 212B placed on the access point 121B measures the pressure P ₂ and the flow rate Q ₂ of fluid 125 flowing through the pipe 120 at the location of the access point 121B. By using a pressure difference P between the pressure P ₁ and the pressure P _2, the leak rate Q of the leak hole 140 may calculate the area of the leakage hole 140. The following model equation (Equation 1) can be used to calculate the area of the leak hole 140.

  In Equation 1, the leak flow rate Q corresponds to the difference between the flow rates measured by the flow sensor 212A and the flow sensor 212B. For example, the difference in the flow rate of the fluid 125 from the leak hole 140 (also referred to as the nighttime minimum leak flow rate) measured in a time zone in which the flow rate of the fluid 125 inside the pipe 120 is minimum may be used as the leak flow rate Q . The nighttime minimum leak flow rate may be a numerical value based on the flow rate measured in a time zone in which the flow rate of the fluid flowing inside the pipe 120 is relatively smaller than that in the other time zones, and all the time It may not be the smallest with respect to the band. The water pressure difference P is a pressure difference of water pressure measured at the access point 121A and the access point 121B arranged across the suspected section. ρ is the density of the fluid 125 flowing inside the pipe 120. A is a correction factor based on the type of fluid 125. c is a flow coefficient set based on an actual measurement value. a is the area of the leak hole 140 to be calculated. If the fluid 125 flowing inside the pipe 120 is water, the coefficient A may be set to 1. When the fluid 125 flowing inside the pipe 120 is a gas or the like, the coefficient of thermal expansion determined by the temperature of the fluid 125 may be input to the coefficient A with reference to a known database.

That is, the area of the leakage hole 140 can be calculated by applying the measured water pressure difference P and the leak flow rate Q to the following equation 2 obtained by modifying the equation 1.

  FIG. 10 is an example of displaying the correlation result and the repair plan outputted by the information presentation system 1 on the display device 40. In the example of FIG. 10, an example of displaying pipeline information in the first display area 401, the correlation result in the second display area 402, the damage status in the third display area 403, and the repair plan in the fourth display area 404. It is. In addition, the information and display position which are displayed on the 1st-4th display area 401-404 are an example, Comprising: It displays on the display apparatus 40, and does not limit the position and the content of information.

  In the first display area 401, conduit information (also referred to as first display information) indicating a leakage position is displayed in a conduit network including at least one piping 120 to be examined. For example, in the first display area 401, the arrangement state of the pipes 120 in the pipeline network of the range including the section in which the leak occurs and the location where the leak occurs are displayed as pipeline information. In FIG. 10, the place where the leakage occurs is indicated by a black circle (●). Note that the access point 121 or the like may be displayed in the first display area 401.

  In the second display area 402, second display information including at least one of the leak position of the pipe 120, the leak flow rate from the leak hole 140, the water pressure of the fluid flowing inside the pipe 120, and the area of the leak hole 140. Is displayed. For example, in the second display area 402, a correlation result including the leakage position estimated by the information presentation system 1, the leakage flow rate from the leakage hole 140, the water pressure, the area, and the like is displayed.

  In the third display area 403, a third damage status regarding the damage status of the pipe 120 estimated by the damage status estimating unit 25 is displayed. FIG. 10 shows an example in which the damage status according to the evaluation value is displayed in the third display area 403.

  The fourth display area 404 displays fourth display information on the repair plan of the pipe 120. For example, the repair plan selected based on the cost by the repair plan setting unit 27 may be displayed in the fourth display area 404.

  FIG. 11 is an example in which the detection result, the investigation content, and the repair plan output by the information presentation system 1 are displayed on the display device 40 in a table format. In the example of FIG. 11, the presence or absence of leakage and the position of leakage are displayed in the column of detection results. Also, display the water pressure, leak flow rate, leak hole area, and damage status in the field of the survey content. Then, the repair method and cost of the pipe 120 are displayed in the repair plan column. Note that FIG. 11 is an example in which information is displayed on the display device 40, and the position and content of the information to be displayed on the display device 40 are not limited.

  The above is the description of the configuration of the information presentation system 1. However, the configuration of the information presentation system 1 described above is an example, and the configuration of the information presentation system 1 according to the present embodiment is not limited.

(Operation)
Next, the operation of the information presentation system 1 according to the embodiment will be described with reference to the drawings. FIG. 12 is a flowchart for explaining the operation of the information presentation system 1 of the present embodiment. In addition, in description of the flowchart of FIG. 12, the information presentation system 1 is regarded as a subject of operation | movement, and is demonstrated.

  In FIG. 12, first, the information presentation system 1 executes correlation type leakage detection using the first sensor group 100 on the social infrastructure installation to be inspected (here, the pipe 120) (step S11).

  Next, the information presentation system 1 outputs information on the presence or absence of leakage and the position of leakage to the display device 40 (step S12). The information output to the display device 40 is displayed on the display device 40.

  Next, the information presentation system 1 measures the pressure and flow rate of the fluid using the second sensor group 200 in the target section in which the leak is detected (step S13).

  Next, the information presentation system 1 calculates the area of the leak hole 140 from the measured values of pressure and flow rate (step S14).

  Next, the information presentation system 1 estimates the damage situation based on the pipeline drawing (step S15).

  Next, the information presentation system 1 sets a repair plan including the repair method and the repair cost based on the estimated damage situation (step S16).

  Then, the information presentation system 1 outputs the set repair plan to the display device 40 (step S17). The repair plan output to the display device 40 is displayed on the display device 40.

  The above is the description of the operation of the information presentation system 1 along the flowchart of FIG. The operation of the information presentation system 1 along the flowchart of FIG. 12 is an example, and the operation of the information presentation system 1 according to the present embodiment is not limited.

  As described above, the leak monitoring system according to the present embodiment detects a leak and identifies the detected leak position by the correlation method. For example, the leakage monitoring system of the present embodiment grasps the damage situation by the area of the leakage hole calculated using the water pressure of the narrowed survey section and the minimum flow rate at night, and the optimal repair method To present. As a result, according to the present embodiment, it is possible to provide an information presentation system capable of detecting a leak in a buried pipe and presenting a repair plan according to the damage situation regarding the pipe in which the leak is detected.

(hardware)
Here, the hardware configuration of the information presentation system according to each embodiment of the present invention will be described by taking the information processing apparatus 90 of FIG. 13 as an example. The information processing apparatus 90 of FIG. 13 is a configuration example of the information presentation system of each embodiment, and does not limit the scope of the present invention.

  As illustrated in FIG. 13, the information processing device 90 includes a processor 91, a main storage device 92, an auxiliary storage device 93, an input / output interface 95, a communication interface 96, and a display device 97. In FIG. 13, the interface is abbreviated as I / F (Interface). The processor 91, the main storage device 92, the auxiliary storage device 93, the input / output interface 95, the communication interface 96, and the display device 97 are communicably connected to each other via a bus 99. The processor 91, the main storage device 92, the auxiliary storage device 93, the input / output interface 95, and the display device 97 are connected to a network such as the Internet or an intranet via the communication interface 96. The display device 97 may or may not be included in the information processing apparatus 90.

  The processor 91 deploys the program stored in the auxiliary storage device 93 or the like in the main storage device 92, and executes the deployed program. In the present embodiment, the software program installed in the information processing apparatus 90 may be used. The processor 91 executes processing by the information presentation system according to the present embodiment.

  The main storage device 92 is a memory having an area in which a program is expanded. The main storage device 92 may be, for example, a volatile memory such as a dynamic random access memory (DRAM). In addition, a non-volatile memory such as a magnetoresistive random access memory (MRAM) may be configured and added as the main storage device 92.

  The auxiliary storage device 93 stores various data. The auxiliary storage device 93 is configured by a local disk such as a hard disk or a flash memory. Note that various data may be stored in the main storage unit 92, and the auxiliary storage unit 93 may be omitted.

  The input / output interface 95 is an interface for connecting the information processing apparatus 90 and peripheral devices. The communication interface 96 is an interface for connecting to an external system or device through a network such as the Internet or an intranet based on standards and specifications. The input / output interface 95 and the communication interface 96 may be common as an interface connected to an external device.

  The display device 97 is a display device for displaying information. The display device 97 may be an external device connected via the input / output interface 95.

  The information processing apparatus 90 may be configured to connect input devices such as a keyboard, a mouse, and a touch panel as necessary. Those input devices are used to input information and settings. In the case of using a touch panel as an input device, the display screen of the display device may be configured to double as an interface of the input device. Data communication between the processor 91 and the input device may be performed by the input / output interface 95.

  In addition, the information processing apparatus 90 may be equipped with a disk drive as needed. The disk drive is connected to the bus 99. The disk drive mediates reading of the data program from the recording medium, writing of the processing result of the information processing apparatus 90 to the recording medium, and the like between the processor 91 and a recording medium (program recording medium) (not shown). The recording medium can be realized by, for example, an optical recording medium such as a CD (Compact Disc) or a DVD (Digital Versatile Disc). Also, the recording medium may be realized by a semiconductor recording medium such as a Universal Serial Bus (USB) memory or a Secure Digital (SD) card, a magnetic recording medium such as a flexible disk, or another recording medium.

  The above is an example of the hardware configuration for enabling the information presentation system according to each embodiment of the present invention. The hardware configuration in FIG. 13 is an example of the hardware configuration for executing the arithmetic processing of the information presentation system according to each embodiment, and does not limit the scope of the present invention. Moreover, the program which makes a computer perform the process regarding the information presentation system which concerns on each embodiment is also contained in the scope of the present invention. Furthermore, a program recording medium recording the program according to each embodiment is also included in the scope of the present invention.

  The components of the information presentation system of each embodiment can be arbitrarily combined. Further, the components of the information presentation system of each embodiment may be realized by software or circuits.

  Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 information presentation system 10 leak detection apparatus 11 1st measurement information acquisition part 12 1st measurement information storage part 13 correlation process part 14 correlation result output part 20 repair plan presentation apparatus 21 2nd measurement information acquisition part 22 2nd measurement information storage part 23 leaked hole area calculation unit 24 pipeline information storage unit 25 damage situation estimation unit 26 repair information storage unit 27 repair plan setting unit 28 repair plan output unit 40 display device 100 first sensor group 110 first sensor 111 detector 112 data logger 120 Piping 200 Second sensor group 210 Second sensor 211 Water pressure sensor 212 Flow sensor

Claims (10)

The first detection signal collected by the plurality of first sensors installed in the piping included in the pipeline network to be surveyed is received, the received first detection signal is analyzed by correlation processing, and leakage of the piping is detected A leak detection device that determines presence / absence and specifies a leak position when detecting leak in the pipe, and outputs a detection result including at least the specified leak position;
The second detection signal acquired by the plurality of second sensors installed based on the detection result generated by the leak detection device is received, and the damage condition of the pipe is determined using the received second detection signal. An information presentation system comprising: a repair plan presentation device configured to estimate and set at least one repair plan based on the estimated damage situation; and outputting the configured repair plan. The leak detection device is
First measurement information acquisition means for receiving the first detection signal collected by the plurality of first sensors installed in each of the plurality of access points installed in the pipe;
First measurement information storage means in which the first detection signal received by the first measurement information acquisition means is stored;
The first detection signal stored in the first measurement information storage means is analyzed by correlation processing to generate a cross correlation function, and the presence or absence of leakage in the pipe is determined based on the generated cross correlation function, Correlation processing means for specifying the leak position when the leak is detected in the pipe;
The information presentation system according to claim 1, further comprising: correlation result output means for outputting the detection result including at least the leak position specified by the correlation processing means. The repair plan presentation device
Second measurement information acquisition means for receiving the second detection signal acquired by the plurality of second sensors installed for each of the at least two of the access points in a relation sandwiching the leakage position;
A second measurement information storage unit storing the second detection signal received by the second measurement information acquisition unit;
Leakage hole area calculation means for acquiring the second detection signal stored in the second measurement information storage means, and using the acquired second detection signal to calculate the area of the leak hole at the leakage position of the pipe ,
Pipeline information storage means for storing piping information of the piping at the position of the access point;
Damage condition estimation means for estimating the damage situation at the leakage position by referring to the conduit information storage means based on the area of the leakage hole calculated by the leakage hole area calculation means and the leakage position;
Repair information storage means for storing repair information including the pipe repair method and repair cost associated with the damage situation;
A repair plan that sets at least one repair plan including at least the repair method of the pipe and the cost spent on the repair method with reference to the repair information storage means based on the damage situation estimated by the damage situation estimation means Setting means,
The information presentation system according to claim 2, which outputs the repair plan set by the repair plan setting means. The leak detection device is
The first detector including a first detector configured to measure at least one of water pressure of fluid flowing inside the pipe and vibration propagating through the pipe; and a data logger configured to collect data acquired by the first detector. Receiving from the one sensor a signal related to the data acquired by the first detector as the first detection signal,
The repair plan presentation device
From the second sensor including the second sensor that measures the water pressure of the fluid flowing inside the pipe, and the third sensor that measures the flow rate of the fluid flowing inside the pipe, the second sensor and the second sensor The information presentation system according to claim 3, wherein a signal related to data acquired by a third detector is received as the second detection signal. The repair plan presentation device
Based on the second detection signal measured by the second sensor installed at the two access points in a positional relationship sandwiching the leakage position,

However,
Q: Difference in flow rate measured by the third detector installed at two of the access points A: Correction coefficient based on type of fluid c: Flow coefficient set based on actual value 値: Density of fluid 5. The information presentation system according to claim 4, wherein the area of the leak hole is calculated using a model equation which is a difference in water pressure measured by the second detector installed in two of the access points. The repair plan presentation device
The flow rate measured by the third detectors installed at the two access points in a positional relationship sandwiching the leakage position during a time zone in which the flow rate of the fluid flowing inside the pipe becomes smaller than other time zones The information presentation system according to claim 5, wherein the area of the leak hole is calculated by applying the difference of The repair plan presentation device
Connected to the display,
First display information indicating the leakage position in a pipeline network including at least one of the pipes to be investigated;
Second display information including at least one of the leak position, the leak flow rate from the leak hole, the water pressure of the fluid flowing inside the pipe, and the area of the leak hole;
Third display information regarding the damage status of the pipe,
The information presentation system according to any one of claims 3 to 6, wherein at least one display information of the fourth display information related to the repair plan is displayed on the display device. Measurement information acquisition means for receiving a detection signal acquired by a sensor installed at each of at least two access points having a relation sandwiching the leakage position in the piping in which the leakage position is specified;
Measurement information storage means in which the detection signal received by the measurement information acquisition means is stored;
Leakage hole area calculation means for acquiring the detection signal stored in the measurement information storage means and calculating the area of the leakage hole at the leakage position of the pipe using the acquired detection signal;
Pipeline information storage means for storing pipeline information of a pipeline network including the piping;
Damage condition estimation means for estimating the damage condition at the leakage position by referring to the conduit information storage means based on the area of the leakage hole calculated by the leakage hole area calculation means and the leakage position;
Repair information storage means for storing repair information including the pipe repair method and the repair cost;
Repair plan setting means for setting at least one repair plan including at least the repair method of the pipe and the repair cost with reference to the repair information storage means based on the damage situation estimated by the damage situation estimation means;
The repair plan presentation apparatus which outputs the said repair plan set by the said repair plan setting means. Receiving a first detection signal collected by a plurality of first sensors installed in a pipe to be investigated;
Analyzing the received first detection signal by correlation processing;
Determine the presence or absence of leakage in the pipe;
If a leak is detected in the piping, identify the location of the leak,
Outputting a detection result including at least the identified leakage position;
Receiving a second detection signal acquired by a plurality of second sensors installed based on the output detection result;
Estimating the damage condition of the pipe using the received second detection signal;
Set up at least one repair plan based on the estimated damage situation,
An information presentation method for outputting the set repair plan. A process of receiving a first detection signal collected by a plurality of first sensors installed in a pipe to be investigated;
A process of analyzing the received first detection signal by correlation processing;
A process of determining the presence or absence of a leak in the pipe;
A process of identifying a leak position when a leak is detected in the pipe;
A process of outputting a detection result including at least the identified leakage position;
A process of receiving a second detection signal acquired by a plurality of second sensors installed based on the output detection result;
A process of estimating a damage condition of the pipe using the received second detection signal;
A process of setting at least one repair plan based on the estimated damage situation;
A program that causes a computer to execute a process of outputting the set repair plan.

Images