system

Abstract

To provide a system which can improve the efficiency of maintenance management (productivity), and can contribute to energy saving, related to the management of sanitary equipment.SOLUTION: A system for managing sanitary equipment having a water supply pipe and a drain pipe connected to the sanitary equipment comprises: a pressure detector for detecting hydrostatic pressure in the water supply pipe; a water level detector for detecting a water level in the drain pipe; a drain pipe for pressure-sending water in the drain pipe while withstanding the gravity; and a signal processing device for controlling the drive of the drain pipe on the basis of the water level in the drain pipe which is outputted from the water level detector. In the system, the signal processing device stores the hydrostatic pressure in the water supply pipe outputted from the pressure detector in time series, performs a determination using the hydrostatic pressure, transmits a requirement for increasing a flow rate, reducing the flow rate, and maintaining the flow rate, or an alert of an abnormality to a central monitoring device on the basis of a result of the determination, and transmits the result of the determination to an external terminal without going through the central monitoring device of a building.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a system for managing sanitary facilities.

Background Art

[0002] Toilet management systems have been proposed (see Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] An embodiment of the present invention aims to provide a system that can improve maintenance management efficiency (productivity), promote preventive maintenance, and contribute to energy savings in the management of sanitary facilities.

Means for Solving the Problems

[0005] The present invention includes the following embodiment.

[0006] Sanitary equipment installed in a building, A water supply pipe and a drain pipe connected to the sanitary equipment, A system for managing sanitary facilities comprising: A pressure detector for detecting the static water pressure in the water supply pipe, A water level detector for detecting the water level in the drain pipe, A drainage pump for pumping the water in the drain pipe against gravity, A signal processing device for controlling the driving of the drainage pump based on the water level in the drain pipe output from the water level detector. The signal processing device is The hydrostatic pressure in the water supply pipe output from the pressure detector is stored in chronological order. A determination is made using the hydrostatic pressure stored in the aforementioned time series. A system that, based on the results of the aforementioned determination, sends a request to increase the flow rate, a request to decrease the flow rate, a request to maintain the flow rate, or an alert for an abnormality to a central monitoring device, and also sends the results of the aforementioned determination to an external terminal without going through the central monitoring device of the building. [Effects of the Invention]

[0007] According to one embodiment of the present invention, a system can be provided that can improve maintenance efficiency (productivity), promote preventive maintenance, and contribute to energy conservation in relation to the management of sanitary facilities. [Brief explanation of the drawing]

[0008] [Figure 1] This diagram schematically shows an example of the system configuration according to Embodiment 1. [Figure 2] This flowchart shows an example of a determination made by the signal processing device of Embodiment 1. [Figure 3] This flowchart shows an example of a determination made by the signal processing device of Embodiment 2. [Figure 4] This flowchart illustrates an example of drive control of a drainage pump by the signal processing device of Embodiment 1. [Modes for carrying out the invention]

[0009] [Sanitary equipment management system according to Embodiment 1] Figure 1 is a schematic diagram showing an example of the system configuration according to Embodiment 1. In Figure 1, solid lines represent piping, and dotted lines represent the flow of signals that transmit information. As shown in Figure 1, the sanitary equipment management system according to this embodiment is a system for managing sanitary equipment that includes sanitary equipment installed in a building, and water supply pipes and drainage pipes connected to the sanitary equipment, and comprises a pressure detector that detects the hydrostatic pressure in the water supply pipe, a water level detector that detects the water level in the drainage pipe, a drainage pump that pumps water in the drainage pipe against gravity, and a signal processing device that controls the drive of the drainage pump based on the water level in the drainage pipe output from the water level detector. The signal processing device stores the hydrostatic pressure in the water supply pipe output from the pressure detector in chronological order, performs a judgment using the hydrostatic pressure stored in chronological order, and sends a request to increase the flow rate, a request to decrease the flow rate, a request to maintain the flow rate, or an alert for an abnormality to the central monitoring device based on the result of the judgment, and also transmits the result of the judgment to an external terminal without going through the building's central monitoring device. The following will describe them in order.

[0010] (sanitary equipment) Sanitary fixtures include all types of equipment that use water, such as toilets, sinks, bathtubs, and kitchens.

[0011] Sanitary equipment is installed inside the building. Buildings include office buildings and apartment complexes.

[0012] Sanitary equipment is installed, for example, on each floor of a building. In this embodiment, we will explain using an example where three sanitary equipment units are installed on each floor of a three-story building. Specifically, we will explain using an example where three toilets are installed on the first floor, three handwashing sinks are installed on the second floor, and three toilets are installed on the third floor. Although we will take the example of installing three sanitary equipment units on each floor, the number of sanitary equipment units is not particularly limited.

[0013] (water supply pipe) A water supply pipe is connected to the sanitary equipment. The water supply pipe is a pipe through which water passes before being used in the sanitary equipment. The water supplied from the water supply pipe to the sanitary equipment is used in the sanitary equipment and discharged from the drain pipe.

[0014] (Water supply pump) A water supply pump is installed in the building. The water supply pump is a device that pumps water to the sanitary equipment against gravity. By pumping water against gravity by the water supply pump, for example, from a water supply facility such as a water storage tank or a public water distribution pipe (water supply pipe) on the first floor or basement of a building, to a sanitary equipment installed above the water supply source on the second or third floor of the building, it becomes possible to supply water with sufficient pressure.

[0015] The pumping mentioned in the previous paragraph means sending out water at a predetermined pressure. The predetermined pressure can be changed by controlling the rotation speed of the water supply pump, etc. The control of the water supply pump can be executed, for example, by outputting a predetermined signal from a central monitoring device, etc., to the water supply pump.

[0016] (Make-up water valve) A make-up water valve may be installed in the water supply pipe. The make-up water valve is a device that operates based on an open / close signal output from a signal processing device, and has a function of stopping the water supply to the sanitary equipment in case of an abnormality.

[0017] (Drain pipe) A drain pipe is connected to the sanitary equipment. The drain pipe is a pipe through which water passes after being used in the sanitary equipment. The water discharged from the sanitary equipment passes through the drain pipe and is discharged to a water discharge facility such as a public distribution pipe (sewer pipe).

[0018] (Drain pump) The building is equipped with drainage pumps. Drainage pumps are devices that pressurize water discharged from sanitary equipment against gravity. By pressurizing the water discharged against gravity, drainage pumps provide flexibility in the installation of drainage pipes. For example, it becomes possible to route drainage pipes, which are located under the second-floor floor and connected to sanitary equipment on the second floor, through the floors and walls of the second and third floors, and then up to the ceiling of the second floor.

[0019] In the previous paragraph, "pressure pumping" refers to the process of sending out drained water at a predetermined pressure, similar to the case of a water supply pump. This predetermined pressure can be changed by controlling the rotation speed of the drainage pump, among other things. The drainage pump can be controlled by outputting a predetermined signal from a signal processing device to the drainage pump.

[0020] (Pressure detector) A pressure detector is a device that detects the hydrostatic pressure inside a water supply pipe. Various known devices capable of detecting pressure can be used as pressure detectors.

[0021] Pressure sensors are installed, for example, on the inside or outside of water supply pipes. In this embodiment, as an example, one pressure sensor is installed on the inside or outside of the water supply pipe connected to three toilets on the first floor, one pressure sensor is installed on the inside or outside of the water supply pipe connected to three handwashing sinks on the second floor, and one pressure sensor is installed on the inside or outside of the water supply pipe connected to three toilets on the third floor. In addition, on each floor, a pressure sensor is installed between the water supply valve and the sanitary equipment.

[0022] The pressure sensor outputs the detected hydrostatic pressure in the water supply pipe to the signal processing unit. The pressure sensor is connected to the signal processing unit by wired and / or wireless connection.

[0023] (Water level detector) A water level detector is a device that detects the water level in a drainpipe. Various known devices capable of detecting water levels can be used as water level detectors. One example of a drainpipe water level is the position of the water along the length of the drainpipe. Information indicating how far water discharged from sanitary equipment has traveled through the drainpipe from the equipment is another example of a drainpipe water level. In addition, a drain tank may be provided in part of the drainpipe to store water discharged from sanitary equipment, in which case the water level of the water stored in the drain tank can be considered an example of a drainpipe water level.

[0024] The water level detector is installed, for example, on the inside or outside of the drainpipe. In this embodiment, as an example, one water level detector is installed on the inside or outside of the drainpipe connected to three toilets on the first floor, one water level detector is installed on the inside or outside of the drainpipe connected to three handwashing sinks on the second floor, and one water level detector is installed on the inside or outside of the drainpipe connected to three toilets on the third floor.

[0025] The water level detector outputs the detected water level in the drainpipe to the signal processing unit. The water level detector is connected to the signal processing unit by wired and / or wireless connection.

[0026] (Signal processing device) The signal processing device controls the operation of the drain pump based on the water level in the drain pipe, which is output from the water level detector. An example of drain pump operation control by the signal processing device will be explained below with reference to Figure 4.

[0027] (Step S31) First, the signal processing unit obtains the water level in the drainpipe. For example, the signal processing unit sends a detection request to a water level detector and obtains the water level as a return value from the water level detector.

[0028] (Steps S32, S35) The signal processing device determines whether the water level obtained in step S31 is equal to or greater than the operating water level. The operating water level is the water level at which the drainage pump should be operated. If the water level obtained in step S31 is equal to or greater than the operating water level, the signal processing device proceeds to step S35 and outputs an operation signal to the drainage pump; otherwise, it proceeds to step S33. When the drainage pump receives an operation signal, it starts operating at a predetermined rotational speed. If the drainage pump has already started operating, it continues operating. Operation refers to, for example, rotating the motor equipped in the drainage pump.

[0029] (Steps S33, S36) The signal processing device determines whether the water level obtained in step S31 is below the stop level. The stop level is the water level at which the operation of the drainage pump should be stopped. If the water level obtained in step S31 is below the stop level, the signal processing device proceeds to step S36 and outputs a stop signal to the drainage pump; otherwise, it proceeds to step S34. When the drainage pump receives a stop signal, it stops operation. If the drainage pump has already stopped operation, it continues to stop.

[0030] (Steps S34, S37, S38) The signal processing device determines whether the water level obtained in step S31 is above the alarm level. The alarm level is the water level that indicates that the water level in the drain pipe is abnormally high. If the water level obtained in step S31 is above the alarm level, the signal processing device proceeds to step S37 to close the supply water valve, and then proceeds to step S38 to transmit an alarm signal to an external terminal without going through the central monitoring device. The signal processing device may also transmit an alarm signal to the central monitoring device.

[0031] In addition to controlling the drive of the drainage pump as described above, the signal processing unit stores the hydrostatic pressure in the water supply pipe output from the pressure detector in a time series, performs a determination using this time-series stored hydrostatic pressure, and transmits the result to an external terminal without going through the building's central monitoring system. An example of this determination will be explained below with reference to Figure 2.

[0032] (Step S10) First, the signal processing device stores the hydrostatic pressure inside the water supply pipe in a time series, and uses this time-series stored hydrostatic pressure to calculate the average value Pset(x) of the hydrostatic pressure inside the water supply pipe. Here, x is an integer of 1 or more that indicates the number of times the calculation of Pset has been repeated.

[0033] Pset(x) can be calculated, for example, by repeatedly acquiring the hydrostatic pressure inside the water supply pipe from a pressure sensor at predetermined time intervals (e.g., 0.1 seconds) for a predetermined number of times (e.g., 10 times), storing it in a time series, and then calculating the average value of the hydrostatic pressures stored in that time series.

[0034] For example, the signal processing device acquires hydrostatic pressure 10 times at 0.1-second intervals, thereby obtaining a total of 10 hydrostatic pressure values: P(1), P(2), ... P(10). The signal processing device then calculates the sum of these 10 values ​​and divides this sum by 10 to calculate Pset(1). The signal processing device then again acquires hydrostatic pressure 10 times at 0.1-second intervals, obtaining a total of 10 hydrostatic pressure values: P(1), P(2), ... P(10). The signal processing device then calculates the sum of these 10 values ​​and divides this sum by 10 to calculate Pset(2). The signal processing device then repeats this calculation, calculating Pset(3), Pset(4), Pset(5), ... and so on, increasing the number of repetitions x by one each time, to calculate Pset(x).

[0035] Note that the 0.1 seconds and 10 times mentioned above are just examples. The predetermined time intervals and number of times mentioned above are preferably time intervals and number of times that allow Pset to be considered as indicating the current value of the hydrostatic pressure in the water supply pipe.

[0036] (Step S11) Next, the signal processing device determines whether the judgment formula Pset(x) < Pset(x + 1) holds continuously for a predetermined number of times. For example, when the predetermined number of times in the judgment formula is 3 and there is a relationship of Pset(3) < Pset(4) < Pset(5), the signal processing device determines that the above judgment formula holds continuously for the predetermined number of times. According to this step, it can be determined whether the water supply volume is continuously increasing. That is, when the water supply volume is continuously increasing, it is considered that the static water pressure of the water supply pipe also continuously increases. Therefore, by executing the above judgment using the static water pressure of the water supply pipe stored by the signal processing device in time series, it can be determined whether the water supply volume is continuously increasing.

[0037] (Step S12) Next, the signal processing device determines whether the judgment formula Pset(x) = Pset(x + 1) holds continuously for a predetermined number of times. For example, when the predetermined number of times in the judgment formula is 3 and there is a relationship of Pset(3) = Pset(4) = Pset(5), the signal processing device determines that the above judgment formula holds continuously for the predetermined number of times. According to this step, it can be determined whether the water supply volume is stable. That is, when the water supply volume is stable, it is considered that the static water pressure of the water supply pipe is also stable. Therefore, by executing the above judgment using the static water pressure of the water supply pipe stored by the signal processing device in time series, it can be determined whether the water supply volume is stable.

[0038] (Step S13) Next, the signal processing device determines whether the condition Pset(x)>Pset(x+1) holds true for a predetermined number of consecutive times. For example, if the predetermined number of times is 3 and the relationship Pset(3)>Pset(4)>Pset(5) exists, the signal processing device determines that the above condition is true for the predetermined number of consecutive times. This process makes it possible to determine whether the water supply is continuously decreasing. That is, if the water supply is continuously decreasing, it is assumed that the hydrostatic pressure of the water supply pipe is also continuously decreasing. Therefore, the signal processing device can determine whether the water supply is continuously decreasing by performing the above determination using the hydrostatic pressure of the water supply pipe stored in time series.

[0039] (Step S14) Next, the signal processing device determines whether the condition Pset(x)>>P(x+1) holds true for a predetermined number of consecutive times. Whether Pset(x)>>P(x+1) holds true can be determined, for example, by whether Pset(x) / M>Pset(x+1) holds true. M is, for example, an integer greater than or equal to 2. For example, if the predetermined number of times is 3 and the relationship Pset(3)>>Pset(4)>>Pset(5) exists, the signal processing device determines that the above condition is held true for a predetermined number of consecutive times. This process makes it possible to determine whether the water supply is decreasing rapidly. That is, if the water supply is decreasing rapidly, it is assumed that the hydrostatic pressure of the water supply pipe will also decrease rapidly. Therefore, the signal processing device can determine whether the water supply is decreasing rapidly by performing the above determination using the hydrostatic pressure of the water supply pipe stored in time series.

[0040] (Step S15) Based on the results of the above determination, the signal processing device transmits a request to increase the flow rate, a request to decrease the flow rate, a request to maintain the flow rate, or an alert for an abnormality to the central monitoring device, and also transmits the results of the above determination to an external terminal without going through the building's central monitoring device.

[0041] According to Embodiment 1 described above, it is possible to improve maintenance efficiency (productivity) and contribute to energy saving in relation to the management of sanitary facilities. Specifically, by having the signal processing device directly transmit the determination result to an external terminal without going through a central monitoring device, it is possible to improve maintenance efficiency (productivity) in relation to the management of sanitary facilities. Furthermore, a person possessing an external terminal can grasp the fluctuations in the water supply load based on the determination result in Embodiment 1 and set the efficient water supply pressure of the pump. Therefore, it is possible to contribute to energy saving in sanitary facilities.

[0042] (Central monitoring device) A central monitoring device is a device that monitors various information within a building, including the operating status of sanitary equipment (six sanitary equipment units in this embodiment) and other equipment installed in the building. The central monitoring device is managed, for example, by the building manager. The central monitoring device may be installed inside or outside the building. The central monitoring device is connected to a signal processing device by wired and / or wireless connections. Preferably, the central monitoring device is connected to the water supply pump by wired and / or wireless connections so that it can control the drive of the water supply pump. Controlling the drive of the water supply pump means, for example, controlling the rotation speed of the water supply pump motor. For example, if the central monitoring device receives a request to increase the flow rate from the signal processing device, it increases the rotation speed of the water supply pump motor; if it receives a request to decrease the flow rate, it decreases the rotation speed of the water supply pump motor; if it receives a request to maintain the flow rate, it maintains the rotation speed of the water supply pump as is; and if it receives an abnormality alert, it outputs an alarm sound or alarm display to a speaker or monitor, etc.

[0043] (External terminal) An external terminal is a device not managed by a central monitoring system. External terminals are connected to a signal processing device via wired and / or wireless connections, without going through the central monitoring system. "Without going through the central monitoring system" means that data and information transmitted from the signal processing device to the external terminal are not received by the central monitoring system and then transmitted from the central monitoring system to the external terminal; rather, the data and information are directly transmitted and received between the signal processing device and the external terminal. External terminals can include, for example, mobile devices such as smartphones. External terminals are typically carried by workers performing tasks such as repairing or replacing sanitary equipment.

[0044] A signal processing device can be implemented using hardware such as IC circuits, or it can be implemented using a combination of hardware and software, such as a server computer that executes a predetermined program. Furthermore, a signal processing device includes, for example, an arithmetic unit capable of performing calculations based on the output signals of each detector, and memory capable of storing the output signals and the calculation results from the arithmetic unit. An example of an arithmetic unit is a CPU, and an example of memory is RAM or ROM. The operation of the signal processing device can be achieved, for example, by the arithmetic unit executing a program stored in memory, or by the hardware, such as IC circuits constituting the arithmetic unit, operating autonomously in response to signals input to the arithmetic unit.

[0045] [Sanitary equipment management system according to Embodiment 2] Figure 3 is a flowchart showing an example of a determination made by the signal processing device of Embodiment 2. Embodiment 2 differs from Embodiment 1 in that the signal processing device uses hydrostatic pressure stored in a time series to perform the following determination in addition to the determination made in Embodiment 1, and transmits the result of the determination to an external terminal without going through the building's central monitoring device. The differences will be explained below, with reference to Figure 3.

[0046] (Step S20) First, the signal processing device calculates the average value Ps of Pset(x) calculated in Embodiment 1. For example, the signal processing device calculates Ps by repeating the calculation of Pset(x) described above a predetermined number of times (e.g., 60 times) and calculating the average value of Pset(x) in those predetermined number of times. For example, the signal processing device obtains a total of 60 Pset(x) such as Pset(1), Pset(2), ··· Pset(60), calculates the sum of these 60 Pset(x), and divides this sum by 60 to calculate Ps. Even when calculating Ps in this way, since the static water pressure in the water supply pipe stored in time series is used for the calculation of Pset(x) that is the premise of the calculation, the determination using Ps is also an example of a determination using the static water pressure in the water supply pipe stored in time series, similar to the case of the determination using Pset(x). Note that in the above, the predetermined number of times in the calculation of Ps is set to 60 times, but this is just an example. The predetermined number of times is preferably a number suitable for making the determination in this embodiment.

[0047] (Step S21) Next, the signal processing device determines whether the judgment formula Ps < Ps_al holds continuously for a predetermined number of times. Ps_al is a value serving as a criterion for issuing a high-pressure alarm. The high-pressure alarm is an alarm that notifies that the pressure in the pipe has abnormally increased due to the aging deterioration of the pipe.

[0048] (Step S22) Next, the signal processing device determines whether either Ps < Pmin or Ps > Pmax holds. Pmin and Pmax are values serving as criteria indicating the aging deterioration of the pipe. When Ps is smaller than Pmin, or when P max is larger, it is assumed that the pressure in the pipe has abnormally decreased or increased due to the aging deterioration of the pipe.

[0049] (Step S23) The signal processing device transmits the results of the above determination to an external terminal without going through the building's central monitoring system. By transmitting the determination results directly to the external terminal without going through the central monitoring system, the maintenance efficiency (productivity) of sanitary facilities can be improved.

[0050] According to Embodiments 1 and 2 described above, in addition to improving maintenance efficiency (productivity) and contributing to energy conservation, preventive maintenance can be promoted with respect to the management of sanitary facilities. Specifically, by having the signal processing device directly transmit the judgment result to an external terminal without going through a central monitoring device, maintenance efficiency (productivity) can be improved with respect to the management of sanitary facilities. Furthermore, a person possessing an external terminal can grasp fluctuations in the water supply load based on the judgment result in Embodiment 1 and set an efficient water supply pressure for the pump. Therefore, it can contribute to energy conservation in sanitary facilities. Moreover, a person possessing an external terminal can estimate the pressure loss in the water supply pipe and, consequently, the progress of deterioration of sanitary equipment based on the judgment result in Embodiment 2, and consider the timing of repair or replacement of the water supply pipe. Therefore, preventive maintenance of sanitary equipment and, consequently, a reduction in maintenance costs can be promoted.

[0051] As described above, Embodiments 1 and 2 can contribute to improving maintenance efficiency (productivity), promoting preventive maintenance, and saving energy in relation to the management of sanitary facilities. Each of these will be explained below.

[0052] (Improvement of maintenance efficiency (productivity)) Conventionally, information regarding the hydrostatic pressure of the water supply could not be obtained unless a worker went to the site. However, according to Embodiments 1 and 2, workers can obtain this information immediately via an external terminal without going through a central monitoring device. Therefore, workers can obtain information regarding the water supply before going to the site or before being contacted by the building management company that manages the central monitoring device. Furthermore, workers can go to the site after reviewing information such as what kind of problems are occurring in the water supply pipes. Thus, according to Embodiments 1 and 2, the efficiency of maintenance and management of sanitary facilities (in other words, the productivity of sanitary facility management work) can be improved.

[0053] (Promoting preventive maintenance) According to Embodiments 1 and 2, the signal processing device performs a determination using the hydrostatic pressure of the water supply pipe and transmits the result to an external terminal. Based on the determination result received by the external terminal, the worker can estimate the pressure loss in the water supply pipe and, consequently, the progress of deterioration of the sanitary equipment, and consider the timing of repair or replacement of the water supply pipe. Therefore, preventive maintenance of sanitary equipment and, consequently, a reduction in maintenance costs can be achieved.

[0054] (Contribution to energy conservation) According to embodiments 1 and 2, the signal processing device performs a determination using information regarding the hydrostatic pressure of the water supply pipe and transmits the result to an external terminal. Based on the determination result received by the external terminal, the operator can grasp the fluctuations in the water supply load and set the efficient water supply pressure of the pump. Therefore, it can contribute to energy saving in sanitary facilities.

[0055] Although embodiments have been described above, these descriptions are merely examples, and the configurations described in the claims are not limited in any way. Even if the configuration differs from the above description, as long as it has the configuration described in the claims, it will achieve the effects of the present invention and will be included in the present invention.

Claims

1. Sanitary equipment installed inside the building, Water supply pipes and drainage pipes connected to the aforementioned sanitary equipment, A system for managing sanitary facilities equipped with, A pressure detector for detecting the hydrostatic pressure inside the water supply pipe, A water level detector for detecting the water level inside the drain pipe, A drainage pump that pumps water in the drainage pipe against gravity, The system includes a signal processing device that controls the operation of the drain pump based on the water level in the drain pipe output from the water level detector, The signal processing device is (1) Obtain the hydrostatic pressure inside the water supply pipe at predetermined time intervals and obtain multiple values ​​related to the hydrostatic pressure inside the water supply pipe. (2) Calculate the average value based on the above multiple values, (3) By repeating the processes in (1) and (2) above, multiple average values ​​are calculated, (4) Using the multiple average values ​​calculated above, a determination is made regarding the amount of water supplied. (5) A system that transmits a request to increase flow rate, a request to decrease flow rate, a request to maintain flow rate, or an alert for an abnormality to a central monitoring device based on the result of the determination, and transmits the result of the determination to an external terminal without going through the central monitoring device of the building.

2. The system according to Claim 1, The signal processing device determines that the amount of water supplied in the water supply pipe is continuously increasing if the repeatedly calculated average value increases for a predetermined number of consecutive times. The signal processing device determines that the amount of water supplied in the water supply pipe is stable if the repeatedly calculated average value is equal for a predetermined number of consecutive times. The signal processing device determines that the amount of water supplied in the water supply pipe is continuously decreasing if the repeatedly calculated average value decreases for a predetermined number of consecutive times. The signal processing device is a system that determines that the amount of water supplied in the water supply pipe is rapidly decreasing if the repeatedly calculated average value decreases by more than a predetermined rate for a predetermined number of consecutive times.

3. The system according to claim 1 or 2, The signal processing device is The average of the repeatedly calculated averages is calculated, The determination is made as to whether the condition that the average of the above average values ​​< the threshold value for issuing a high-pressure alarm is met for a predetermined number of consecutive times. A system for determining whether either of the following conditions is met: the average of the aforementioned average values ​​< a first standard value indicating deterioration of the piping over time, or the average of the aforementioned average values ​​> a second standard value indicating deterioration of the piping over time.

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