JP2023084403A - Unspecified water estimation system - Google Patents

Abstract

To provide an unspecified water estimation system capable of simply estimating an occurrence site of unspecified water.SOLUTION: An unspecified water estimation system includes: a discharge flow rate acquisition unit (water level gauge 20, control unit 42) that acquires a discharge flow rate of a manhole pump 10 installed in a manhole 2; a precipitation amount acquisition unit (control unit 42) capable of acquiring the amount of precipitation; and an estimation unit (control unit 42) that estimates presence or absence of occurrence of unspecified water in the manhole 2 based on the discharge flow rate and the amount of precipitation.SELECTED DRAWING: Figure 1

Description

The present invention relates to technology of an unknown water estimation system for estimating the presence or absence of unknown water in manholes.

Conventionally, a technique for estimating the presence or absence of unknown water that has flowed into a manhole is known. For example, Patent Literature 1 discloses an unknown water detection device that acquires acoustic data including running water sounds from sound collectors installed in a plurality of manholes, respectively, and predicts the presence or absence of unknown water based on the acoustic data. there is According to the above-described unknown water detection device, it is possible to specify the location where unknown water is generated based on the acoustic data acquired at a plurality of locations.

However, when the location where unknown water is generated is specified by the unknown water detection device, it is necessary to install sound collectors over a wide area. For this reason, it is conceivable that the preparation and installation of the above-described device may take time and effort.

Japanese Patent No. 6614623

SUMMARY OF THE INVENTION The present invention has been made in view of the circumstances described above, and a problem to be solved is to provide an unknown water estimation system capable of simply estimating the location where unknown water is generated.

The problems to be solved by the present invention are as described above, and the means for solving these problems will now be described.

That is, in claim 1, a discharge flow rate acquisition unit that acquires the discharge flow rate of the manhole pump installed in the manhole, a precipitation amount acquisition unit that can acquire the precipitation amount, and based on the discharge flow rate and the precipitation amount and an estimation unit for estimating whether or not unknown water is generated in the manhole.

In claim 2, the discharge flow rate acquisition unit acquires the discharge flow rate using the water level of the manhole or the operation time of the manhole pump.

In claim 3, the estimating unit estimates that unknown water is generated when the rainfall amount is equal to or greater than a first threshold and the discharge flow rate is equal to or greater than a second threshold. It is something to do.

In claim 4, the second threshold is determined based on the discharge flow rate of the manhole pump during fine weather.

In claim 5, there is provided an alarm unit that issues an alarm when the estimation unit estimates that unknown water is occurring and the amount of precipitation exceeds a third threshold. be.

In claim 6, the precipitation acquisition unit can acquire the predicted precipitation, and the alarm unit, when the estimation unit estimates that unknown water is occurring, A warning is issued when the predicted rainfall amount is greater than or equal to the fourth threshold.

In claim 7, the present invention further comprises a display unit capable of displaying a map on which the installation locations of the manholes are displayed, and when the estimation unit estimates that unknown water is occurring, the display unit displays the map In addition to this, a display is provided to indicate that unknown water has been generated in the manhole.

As effects of the present invention, the following effects are obtained.

In claim 1, it is possible to simply estimate the location where unknown water is generated.

In claim 2, the existing water level gauge and manhole pump installed in the manhole can be used to estimate the location where unknown water is generated.

In claim 3, the occurrence of unknown water can be estimated based on the increase in precipitation and the increase in discharge flow rate.

In claim 4, by determining the second threshold value based on the discharge flow rate during fine weather, it is possible to accurately estimate the occurrence of unknown water.

In claim 5, an alarm can be issued when there is a risk of sewage overflow due to a further increase in unknown water.

In claim 6, an alarm can be issued when sewage is likely to overflow due to an increase in precipitation.

In claim 7, it is possible to visually recognize the location where the estimated unknown water is generated.

1 is a block diagram schematically showing an unknown water estimation system according to one embodiment of the present invention; FIG. The graph which shows the time change of the inflow water level in a manhole, and the time change of precipitation. The graph which shows the time change of the inflow water level in a manhole, the time change of precipitation, and the operating time of a manhole pump. FIG. 4 is a schematic diagram showing an example of a display of locations where unknown water is generated;

An unknown water estimation system 1 according to an embodiment of the present invention will be described below with reference to FIG. Below, first, the manhole 2 to be estimated by the unknown water estimation system 1 and the equipment provided in the manhole 2 will be described.

The manhole 2 shown in FIG. 1 is for managing a sewage system buried underground. Manholes 2 are installed at a plurality of locations in the sewage system. An opening is formed in the upper part of the manhole 2 so that a worker can enter and exit from the ground. The opening is provided with a lid 3 that can be opened and closed.

An inflow pipe 4 through which sewage flowing into the manhole 2 flows is connected to the manhole 2 . Sewage from the inflow pipe 4 is temporarily stored in the manhole 2 . Sewage in the manhole 2 is discharged by a manhole pump 10, which will be described later. The manhole 2 is connected to an outflow pipe 5 through which sewage discharged (outflowing) from the manhole 2 flows. Sewage flowing through the sewage system sequentially flows through a plurality of manholes 2, an inflow pipe 4 and an outflow pipe 5, and is guided to a sewage treatment plant.

The sewage may include unknown water. Here, unknown water is rainwater, groundwater, or the like that has entered the sewage system unintentionally. Unknown water includes rainwater infiltration during rainy weather (rainwater infiltration), groundwater infiltration (groundwater infiltration), and the like.

The unknown water estimation system 1 shown in FIG. 1 estimates whether or not unknown water is generated in a plurality of manholes 2 . The unknown water estimation system 1 includes a manhole pump 10 , a water level gauge 20 , a control panel 30 and a control device 40 .

The manhole pump 10 discharges the sewage inside the manhole 2 . A manhole pump 10 is connected to the outflow pipe 5 . The water level in the manhole 2 can be lowered by operating the manhole pump 10 to discharge sewage. In this embodiment, two manhole pumps 10 are installed in one manhole 2 . Below, the two manhole pumps 10 will be described as "first pump 10A" and "second pump 10B" as necessary.

The water level gauge 20 detects the water level inside the manhole 2 . A water level gauge 20 is arranged inside the manhole 2 . As the water level gauge 20, for example, an immersion pressure type can be adopted. The water level gauge 20 is not limited to the immersion pressure type, and various devices capable of detecting the water level, such as a bubble type or a float type, can be employed. A plurality of water level gauges 20 can be installed inside the manhole 2 . For example, in addition to the injection pressure type or bubble type water level gauge 20, a float type water level gauge 20 may be provided for backup.

The control panel 30 controls the operation of the manhole pump 10, sets the operation, and the like. The control panel 30 is installed near the manhole 2 on the ground. The control panel 30 has a control section 31 .

The control section 31 controls the operation of the manhole pump 10 . The control unit 31 has an arithmetic device (eg, CPU, etc.) and a storage device (eg, HDD, etc.). The control unit 31 is communicably connected to the manhole pump 10 and the water level gauge 20 via appropriate communication lines. The control unit 31 can acquire information such as the detection result of the water level by the water level gauge 20 and the operation time of the manhole pump 10 .

The control unit 31 can acquire the detection result of the water level by the water level gauge 20 and control the operation of the manhole pump 10 based on the detection result. Specifically, the control unit 31 controls to start the manhole pump 10 when the water level in the manhole 2 reaches a predetermined start water level, and to stop the manhole pump 10 when the water level in the manhole 2 reaches a predetermined stop water level. It can be carried out.

In addition, the control panel 30 includes an operation panel capable of setting the operation of the manhole pump 10, etc., and a communication unit capable of communicating with external devices (such as a control device 40 described later). The control unit 31 can transmit information such as the detection result of the water level and the operation time of the manhole pump 10 using the communication unit.

The control device 40 is capable of processing various types of information. The control device 40 is located, for example, at the facility of the sewage manager. A general personal computer or the like can be used as the control device 40 . The control device 40 includes a storage section 41 , a control section 42 , a communication section 43 , an input section 44 and a display section 45 .

The storage unit 41 stores various programs and various acquired information. The storage unit 41 is composed of an HDD, a RAM, a ROM, and the like.

The control unit 42 executes programs stored in the storage unit 41 . The control unit 42 is configured by a CPU.

The communication unit 43 can communicate with an external device such as the control panel 30 (control unit 31). The communication unit 43 can exchange information with external devices via various communication means such as the Internet.

The input section 44 is for inputting various kinds of information. The input unit 44 is composed of a keyboard, a mouse, and the like.

The display unit 45 displays various information. The display unit 45 is configured by, for example, a liquid crystal display.

The control device 40 as described above can communicate with the control panels 30 of the manholes 2 installed at a plurality of locations using the communication section 43 . The control device 40 can acquire information such as the detection result of the water level by the water level gauge 20 and the operation time of the manhole pump 10 from the control panel 30 . Here, as the "operating time of the manhole pump 10", the total operating time of both the first pump 10A and the second pump 10B may be employed, or the operating time of either one may be employed. Also, as the "operating time of the manhole pump 10", for example, the average operating time of the first pump 10A and the second pump 10B may be used.

The control device 40 can calculate the discharge flow rate of the manhole pump 10 using the operation time of the manhole pump 10 and the detection result of the water level by the water level gauge 20 .

In addition, the control device 40 can acquire weather information from an external weather information service (for example, a public organization regarding weather) or the like through communication using the communication unit 43 . The control device 40 acquires weather information at predetermined time intervals (for example, every several minutes to one hour). The weather information includes precipitation.

The graph shown in FIG. 2 shows an example of the relationship between the inflow water level of the manhole 2 (maximum water level in one day) and the amount of precipitation (the amount of precipitation in areas where rainwater may flow into the manhole 2) during a predetermined period. It is. Note that the above graph shows, as an example, changes in the inflow water level and the amount of precipitation for each day during the period from October 1st to October 12th. Also, the range surrounded by the two-dot chain line in the inflow water level in the above graph indicates the water level that has increased due to unknown water.

In the example shown in FIG. 2, when the amount of precipitation is approximately 0 (when the weather is fine), unknown water does not flow into the manhole 2, and the inflow water level of the manhole 2 becomes approximately the same value (starting water level). On the other hand, in rainy weather, the inflow water level of the manhole 2 increases according to the amount of precipitation. From this, it is considered that unknown water (infiltration water during rainy weather) is generated due to rain.

Causes for the generation of unknown water include improper connection of sewage pipelines and deterioration of pipelines. The inflow of unknown water leads to a decrease in the treatment capacity of the sewage treatment plant and sewage overflowing from the manhole 2 . In order to avoid such a situation, it is conceivable to take measures such as repairing aging sewers and arranging vacuum trucks for areas where sewage overflows. Therefore, it is desirable to specify the inflow point of unknown water.

The system for estimating unknown water 1 (control unit 42) can perform a process of identifying the location where unknown water is generated based on the discharge flow rate of the manhole pump 10 and the amount of precipitation. Processing performed by the unknown water estimation system 1 will be described below with reference to FIGS. 3 and 4. FIG.

The control unit 42 can perform a process of estimating whether or not unknown water is generated in the manhole 2 based on the discharge flow rate of the manhole pump 10 and the amount of precipitation. In this embodiment, the controller 42 acquires the operation time of the manhole pump 10 as a value indicating the discharge flow rate. The control unit 42 also acquires the detection result (water level) of the water level by the water level gauge 20 .

Also, the control unit 42 acquires the amount of precipitation from an external weather information service. From the viewpoint of improving the accuracy of estimating unknown water in the manhole 2, it is desirable that the control unit 42 acquires the amount of rainfall in an area where rainwater may flow into the manhole 2 that is the target of estimating unknown water. .

For example, the control unit 42 acquires the amount of precipitation in the vicinity of the place where the manhole 2 to be estimated is installed. As a more specific example, the control unit 42 may acquire the amount of precipitation in a predetermined area where the inflow pipe 4 connected to the manhole 2 is arranged. By acquiring such a rainfall amount, it is possible to accurately estimate unknown water due to rainwater infiltrating from the inflow pipe 4 .

The amount of precipitation includes the amount of precipitation actually observed and the amount of precipitation predicted (predicted precipitation). In addition, in the following examples, the control part 42 shall acquire the precipitation amount actually observed.

FIG. 3 is a graph showing an example of each of the above information acquired by the control unit 42. As shown in FIG. In the graph shown in FIG. 3, the graph (solid line) showing the time change of the water level in the manhole 2, the graph (one-dot chain line) showing the time change of the amount of precipitation, and the manhole pump 10 (first pump 10A and second pump 10B) driving time is superimposed. Note that the above graph shows the time change for 24 hours. The control unit 42 can display the graph as shown in FIG. 3 on the display unit 45, for example.

In this embodiment, the control unit 42 performs a process of estimating whether or not unknown water is generated in the manhole 2 based on the operation time of the manhole pump 10 and the rainfall amount. Specifically, when the amount of precipitation in a predetermined area is equal to or greater than a predetermined rainy weather threshold and the operation time of the manhole pump 10 is equal to or greater than a predetermined judgment threshold, the control unit 42 determines that unknown water is present in the manhole 2. determine that it is flowing.

The rainy weather threshold is a value for determining whether or not unknown water is generated based on the amount of precipitation. For example, a value of about 10 mm/h can be used as the rainy weather threshold. Note that the rainy weather threshold is not limited to the values described above, and various values can be set.

The determination threshold value is a value for determining whether or not unknown water is generated based on the operating time (operating time per unit time) of the manhole pump 10 . In this embodiment, the determination threshold value is twice the average operating time of the manhole pump 10 during fine weather. The "average operating time of the manhole pump 10 in fine weather" is the average value of the operating time per unit time of the manhole pump 10 in fine weather.

In FIG. 3, approximately from 0:00 to 1:00 (range indicated by A in the figure), approximately from 8:00 to 10:00 (range indicated by C in the figure), and approximately from 18:00 to 24:00 (range indicated by D in the figure) The range shown) includes a time zone in which the amount of precipitation is equal to or greater than the rainy weather threshold, and the operating time of the manhole pump 10 is at least twice the average operating time during fine weather (equal to or greater than the judgment threshold). is shown. In this case, the control unit 42 determines that unknown water due to rain (infiltration water during rainy weather) is generated during the above time period.

In addition, in FIG. 3, from about 4 o'clock to 5 o'clock (the range indicated by B in the figure) includes a time zone in which the amount of precipitation is equal to or higher than the rainy weather threshold. is less than twice the average operating time in fine weather, the control unit 42 determines that unknown water is not generated.

As shown in FIG. 4, when the control unit 42 determines that unknown water has occurred in the manhole 2, the display unit 45 displays a display indicating that unknown water has occurred on the map including the location where the manhole 2 is installed. to display.

In the above map, the place where the manhole 2 is installed is indicated by a predetermined image (icon) as a manhole installation location 45a. FIG. 4 shows an example of displaying a plurality of manhole installation locations 45a on the map. The map also shows a rainfall display 45b that visually shows the rainfall distribution. The amount of rainfall display 45b indicates the amount of rainfall with a predetermined color gradation based on the weather information.

As shown in FIG. 4, when the controller 42 determines that unknown water has been generated in the manhole 2, it displays a display indicating that unknown water has been generated at the manhole installation location 45a of the manhole 2. FIG. The figure shows an example in which a "rain mark" having the characters "rain" is displayed at the manhole installation location 45a as a display indicating that unknown water has been generated due to rain.

Here, for example, if the rainfall amount is less than the rainy weather threshold, but the operation time of the manhole pump 10 is greater than or equal to the determination threshold, there is a possibility that unknown water is generated due to factors other than rain (for example, groundwater). There is In this case, as a display indicating that unknown water may be generated due to a factor other than rain, a "fine mark" having the characters "fine" may be displayed at the manhole installation location 45a. good.

Further, in the example shown in FIG. 4, the manhole installation location 45a of the manhole 2 where no unknown water is generated is displayed to indicate that no unknown water is generated (no unknown water). Here, the “manhole 2 without unknown water” is the manhole 2 judged not to satisfy the criteria for judgment of generation of unknown water. As the judgment criteria for the manhole 2 without unknown water, for example, the rainfall amount is less than the rainy weather threshold and the operation time of the manhole pump 10 is less than the judgment threshold. It should be noted that the criteria for judging the manhole 2 without unknown water is not limited to the example described above, and various other criteria can be adopted.

In the example shown in FIG. 4, the manhole 2 of the unknown water candidate is displayed in the manhole installation location 45a. Here, the “unknown water candidate manhole 2” is a manhole 2 that does not meet the criteria for determining the occurrence of unknown water, but is judged to have a relatively high possibility of generating unknown water. As the criteria for determining the manhole 2 as an unknown water candidate, for example, the rainfall amount is equal to or greater than the rainy weather threshold, and the operation time of the manhole pump 10 is greater than or equal to a predetermined threshold that is smaller than the determination threshold. As the predetermined threshold value, various values longer than the average operating time of the manhole pump 10 in fine weather and shorter than twice the average operating time (for example, about 1.5 times the average operating time) can be adopted. be. It should be noted that the criteria for judging the manhole 2 as an unknown water candidate is not limited to the example described above, and various other criteria can be employed.

According to the above configuration, it is possible for a sewage manager or the like to visually recognize the location where unknown water is estimated to occur and the location where unknown water may occur. The example shown in FIG. 4 shows an example in which the display color of the manhole installation location 45a is changed according to the possibility of generation of unknown water. Note that the example shown in FIG. 4 is just an example, and the display of the location where unknown water is generated is not limited to the example described above, and various displays can be adopted. For example, the size of the display of the manhole installation location 45a may be changed according to the possibility of occurrence of unknown water.

Here, when the occurrence of unknown water is estimated and the amount of precipitation is large, there is a risk that sewage overflows due to a further increase in unknown water. In the present embodiment, as shown in FIG. 3, the control unit 42 determines that the amount of precipitation (actually observed amount of precipitation) is equal to or greater than a predetermined alarm threshold in the time period when it is determined that unknown water is occurring. If so, issue an alarm (see FIG. 3).

Various values can be adopted as the warning threshold value from the viewpoint of the possibility of overflow of sewage. As shown in FIG. 3, when the generation of unknown water is estimated, the control unit 42 displays a line indicating the alarm threshold on the graph.

When the amount of precipitation is equal to or greater than a predetermined alarm threshold, the control unit 42 issues an alarm by displaying an appropriate message or the like on the display unit 45, for example. The warning can be displayed, for example, on the graph shown in FIG. 3 or on the map shown in FIG. In addition to the above-described display, the control unit 42 can issue an appropriate warning sound.

FIG. 3 shows an example in which the amount of precipitation is greater than or equal to the warning threshold in the time zone around 22:00. In this case, the controller 42 issues an alarm. According to this, an alarm can be issued when sewage is likely to overflow. When the above warning is issued, the sewage manager can take measures such as, for example, arranging in advance a vacuum truck to a place where sewage is likely to overflow.

The processing of the unknown water estimation system 1 (control unit 42) described above is an example, and the processing that can be executed by the unknown water estimation system 1 is not limited to the above examples. For example, in the above-described example, when the amount of precipitation actually observed is equal to or greater than the predetermined alarm threshold, an example is given in which an alarm is issued, but the present invention is not limited to such an aspect.

The control unit 42 performs processing to issue a warning even when it is determined that unknown water is occurring and the predicted amount of precipitation based on weather information from an external weather information service exceeds the warning threshold. can be done. The above process can be executed, for example, on condition that the control unit 42 determines that unknown water is generated.

Specifically, the control unit 42 acquires the amount of precipitation in the near future (for example, from several hours to one day later) in a predetermined area from an external weather information service as the predicted amount of precipitation. The control unit 42 can display a graph showing the predicted amount of precipitation on the graph as shown in FIG. 3 . In this case, the control unit 42 can display a graph based on the amount of rain actually observed up to the present, and a graph based on the predicted amount of rain for the part after the present. be.

The control unit 42 issues an alarm when the predicted precipitation amount is greater than or equal to a predetermined alarm threshold. In addition, the said warning threshold value may be the same value as the warning threshold value in the case of issuing a warning based on the precipitation amount actually observed, and may be a different value. The control unit 42 can display a message or the like as an alarm on the display unit 45 . At this time, the control unit 42 can display on the display unit 45 the time at which the amount of precipitation is expected to reach or exceed the warning threshold.

According to the above configuration, an alarm can be issued when an increase in precipitation is predicted and there is a risk of sewage overflow.

According to the unknown water estimation system 1 as described above, it is possible to estimate whether or not unknown water is generated at the location where the manhole 2 is installed based on the discharge flow rate of the manhole pump 10 and the amount of precipitation. According to this, when it is estimated that there is unknown water in a certain manhole 2, the sewerage administrator can access the sewage system on the upstream side of the manhole 2 (for example, the sewage system in the range from the manhole 2 to the manhole 2 on the upstream side). It is possible to estimate that there is a location where unknown water is generated (a location where unknown water is flowing).

Here, the discharge flow rate of the manhole pump 10 can be obtained based on the operating time of the existing manhole pump 10 installed in the manhole 2 . Also, the amount of precipitation can be obtained from an external weather information service through communication using the communication unit 43 . Therefore, in the present embodiment, it is possible to simply estimate the location where unknown water is generated without installing a new measurement device such as a flowmeter or a rain gauge.

Thus, according to the unknown water estimating system 1 as described above, it is possible to roughly identify the location where unknown water is generated by simple means.

As described above, the unknown water estimation system 1 according to the present embodiment is
A discharge flow rate acquisition unit (water level gauge 20, control unit 42) that acquires the discharge flow rate of the manhole pump 10 installed in the manhole 2;
A precipitation acquisition unit (control unit 42) capable of acquiring precipitation;
an estimation unit (control unit 42) for estimating whether or not unknown water is generated in the manhole 2 based on the discharge flow rate and the precipitation amount;
is provided.
By configuring in this way, it is possible to simply estimate the location where unknown water is generated.
That is, it is possible to estimate whether or not unknown water is generated at the location where the manhole 2 is installed based on the discharge flow rate of the manhole pump 10 and the rainfall amount. The discharge flow rate of the manhole pump 10 can be obtained using existing equipment (manhole pump 10 and water gauge 20) installed in the manhole 2. FIG. As a result, it is possible to simply estimate the location where unknown water is generated without installing a new device such as a flow meter.

In addition, the discharge flow rate acquisition unit (water level gauge 20, control unit 42)
The discharge flow rate is obtained using the water level of the manhole 2 or the operating time of the manhole pump 10 .
By configuring in this way, the existing water level gauge 20 and manhole pump 10 installed in the manhole 2 can be used to estimate the location where unknown water is generated.

Further, the estimation unit (control unit 42)
It is assumed that unknown water is generated when the amount of precipitation is equal to or greater than the first threshold (rainy weather threshold) and the discharge flow rate is equal to or greater than the second threshold (determination threshold). be.
With this configuration, it is possible to estimate the occurrence of unknown water based on an increase in precipitation and an increase in discharge flow rate.

Further, the second threshold is
It is determined based on the discharge flow rate of the manhole pump 10 in fine weather.
By configuring in this way, it is possible to accurately estimate the occurrence of unknown water by determining the second threshold value based on the discharge flow rate during fine weather.

Further, when the estimating unit (control unit 42) estimates that unknown water is occurring and the amount of precipitation exceeds a third threshold (alarm threshold), an alarm unit that issues an alarm (display unit 45).
By configuring in this way, an alarm can be issued when there is a risk that sewage overflows due to a further increase in unknown water. That is, when the occurrence of unknown water is estimated and the amount of precipitation is large, there is a risk that sewage overflows due to a further increase in unknown water. An alarm can be issued in such a case.

In addition, the precipitation acquisition unit (control unit 42)
Predicted precipitation can be obtained,
The alarm unit (display unit 45)
A warning is issued when the estimation unit (control unit 42) estimates that unknown water is occurring and the predicted precipitation amount is equal to or greater than a fourth threshold (alarm threshold). is.
By configuring in this way, an alarm can be issued when sewage may overflow due to an increase in precipitation. That is, when unknown water is estimated to occur and an increase in precipitation is predicted, a further increase in unknown water may cause overflow of sewage. An alarm can be issued in such a case.

In addition, a display unit 45 capable of displaying a map showing the installation locations of the manholes 2 is provided,
The display unit 45 is
When the estimating unit (control unit 42) estimates that unknown water is generated, a display indicating that unknown water is generated in the manhole 2 is displayed together with the map.
By configuring in this way, it is possible to visually recognize the location where the estimated unknown water is generated.

In addition, the water level gauge 20 and the control unit 42 according to the present embodiment are one embodiment of the discharge flow rate acquisition unit according to the present invention.
Moreover, the control part 42 which concerns on this embodiment is one form of implementation of the precipitation acquisition part which concerns on this invention, and an estimation part.
Moreover, the rainy weather threshold value according to this embodiment is an embodiment of the first threshold value according to the present invention.
Moreover, the determination threshold value according to this embodiment is an embodiment of the second threshold value according to the present invention.
Moreover, the warning threshold value which concerns on this embodiment is one embodiment of the 3rd threshold value which concerns on this invention, and a 4th threshold value.
Moreover, the display unit 45 according to the present embodiment is an embodiment of the alarm unit according to the present invention.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above configurations, and various modifications are possible within the scope of the invention described in the claims.

For example, in the present embodiment, an example in which the determination threshold value is set to twice the operation time of the manhole pump 10 under fine weather is shown, but the present invention is not limited to such an aspect. Various values that can determine whether unknown water is generated can be used as the determination threshold.

Further, in the present embodiment, an example is shown in which the display unit 45 of the control device 40 is used to display a location where unknown water is generated and an alarm is displayed, but the present invention is not limited to such an aspect. For example, a screen of a smartphone, a tablet terminal, or the like that can communicate with the control device 40 may be used to display a location where unknown water is generated and an alarm.

Further, in the present embodiment, when the control unit 42 determines that unknown water has occurred in the manhole 2, a display indicating that unknown water has occurred is displayed on the map showing the installation location of the manhole 2 ( (See FIG. 4) Although an example is shown, it is not limited to such an aspect. For example, a display indicating that unknown water has occurred may be displayed in a region different from the display of the map in the display of the display unit 45 .

Moreover, although the control part 42 showed the example which acquires the discharge flow volume of the manhole pump 10 using the operating time of the manhole pump 10 in this embodiment, it is not restricted to such an aspect. For example, the discharge flow rate of the manhole pump 10 may be acquired using the detection result of the water level gauge 20 . Further, for example, the discharge flow rate of the manhole pump 10 may be obtained using both the detection result of the water level gauge 20 and the operating time of the manhole pump 10 .

Also, when unknown water flows into the manhole 2, it is conceivable that it takes a relatively long time for the water level inside the manhole 2 to reach the stop water level after exceeding the starting water level. Therefore, for example, the discharge flow rate may be obtained based on the time from when the water level inside the manhole 2 exceeds the starting water level to when it reaches the stopping water level.

Also, in this embodiment, an example in which the amount of precipitation is obtained from an external weather information service has been shown, but the present invention is not limited to such an aspect. For example, the amount of precipitation may be acquired based on the detection result of an appropriate rain gauge.

1 unknown water estimation system 10 manhole pump 20 water level gauge 40 control device

Claims (7)

a discharge flow rate acquisition unit that acquires the discharge flow rate of the manhole pump installed in the manhole;
a precipitation acquisition unit capable of acquiring precipitation;
an estimating unit for estimating whether or not unknown water is generated in the manhole based on the discharge flow rate and the rainfall amount;
comprising a
Unknown water estimation system. The discharge flow rate acquisition unit
Obtaining the discharge flow rate using the water level of the manhole or the operating time of the manhole pump;
The unknown water estimation system according to claim 1. The estimation unit
Estimating that unknown water is generated when the precipitation amount is equal to or greater than a first threshold and the discharge flow rate is equal to or greater than a second threshold,
The unknown water estimation system according to claim 1 or 2. The second threshold is
Determined based on the discharge flow rate of the manhole pump in fine weather,
The unknown water estimation system according to claim 3. An alarm unit that issues an alarm when the estimation unit estimates that unknown water is occurring and the amount of precipitation exceeds a third threshold,
The unknown water estimation system according to any one of claims 1 to 4. The precipitation acquisition unit
Predicted precipitation can be obtained,
The alarm unit
A warning is issued when the estimation unit estimates that unknown water is occurring and the predicted precipitation amount is equal to or greater than a fourth threshold.
The unknown water estimation system according to claim 5. A display unit capable of displaying a map on which the installation locations of the manholes are displayed,
The display unit
When the estimating unit estimates that the unknown water is generated, the display indicating that the unknown water is generated in the manhole is displayed along with the map.
The unknown water estimation system according to any one of claims 1 to 6.

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