JP2019183696A - Water supply system and water supply device - Google Patents

Abstract

To provide a water supply system capable of continuing operation control of a pump even in failure of a sensor for measuring a pressure measurement value used in the operation control of the pump.SOLUTION: A water supply system includes a storage device for storing a difference in pressure measurement values between a first sensor among a plurality of sensors disposed on different positions on a pipe conduit of a water pipe communicated with a pump and a second sensor S2 different from the first sensor S1 among the plurality of sensors, and the difference of the pressure measurement values measured in a state of closing the pipe conduit of the water pipe, as a pressure correction value. A processor controls a rotational frequency of the pump so that the pressure measurement value measured by the first sensor is agreed with a target pressure when it can receive the pressure measurement value from the first sensor, and controls the rotational frequency of the pump so that a pressure determined on the basis of a pressure measured by the second sensor and a pressure correction value stored in the storage device, is agreed with the target pressure, when it cannot receive the pressure measurement value from the first sensor.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a water supply system and a water supply apparatus.

  In the conventional water supply unit, the pump is operated and controlled so as to stably supply water having a necessary pressure to the end in the building. The methods include a terminal pressure constant control that detects the pressure at the end of a water pipe and controls it to be constant, and an estimated terminal pressure that estimates the terminal pressure from the pressure detected by a pressure sensor installed in or near the water supply unit. There are operation methods such as constant control (see Patent Documents 1 to 4).

Japanese Patent No. 5405277 JP 2017-141771 A Japanese Patent Laid-Open No. 10-9148 Japanese Patent No. 5890669

  In the conventional water supply apparatus, the pump is operated and controlled so as to stably supply water having a necessary pressure to the end of the water pipe in the building. Specifically, the conventional water supply apparatus controls the estimated end pressure to be constant by estimating the end pressure from the discharge pressure detected by the sensor provided in the discharge pipe in the water supply apparatus or in the vicinity of the water supply unit. Alternatively, a pressure sensor is installed at the end on the pipe, and control is performed so that the end pressure detected by the sensor becomes constant. However, in any system, when a necessary sensor fails, the water supply apparatus cannot be operated normally. Therefore, there is a demand for a redundant water supply system and water supply device that can continue operation control of the pump even if a necessary sensor fails.

  The present invention has been made in view of the above problems, and even when a sensor for measuring a pressure measurement value used in operation control of a pump fails, a water supply system capable of continuing operation control of the pump. And it aims at providing a water supply apparatus.

  The water supply system according to the first aspect of the present invention includes a communication circuit that is provided at different positions on a pipe of a water pipe communicating with a pump and communicates with each of a plurality of sensors that measure the pressure of water in the water pipe. And requesting the pressure measurement value obtained by measurement to each of the plurality of sensors via the communication circuit, and controlling to receive the pressure measurement value output from the sensor in response to the request. A difference in pressure measurement values between a processor, a first sensor of the plurality of sensors, and a second sensor of the plurality of sensors different from the first sensor, A storage device that stores, as a pressure correction value, a difference between the pressure measurement values measured in a state where the pipe line is closed, and the processor can receive the pressure measurement value from the first sensor, If the rotation speed of the pump is controlled so that the pressure measurement value measured by the first sensor matches the target pressure, and the pressure measurement value cannot be received from the first sensor, the pressure measured by the second sensor The rotational speed of the pump is controlled so that the pressure determined based on the pressure correction value stored in the storage device matches the target pressure.

  According to this configuration, even if the pressure measurement value cannot be received from the first sensor due to the failure of the first sensor or the disconnection of the communication line, the pressure measurement value and the pressure correction value of the second sensor. And the pressure in the water pipe at the position of the first sensor can be maintained at the target pressure. For this reason, even if the first sensor that measures the pressure measurement value used in the operation control of the pump fails, the operation control of the pump can be continued.

  The water supply system according to the second aspect of the present invention is the water supply system according to the first aspect, wherein the first sensor is farthest from the pump on the pipe of the water pipe among the plurality of sensors. It is a terminal sensor which is a sensor provided at a certain position.

  According to this configuration, the pressure measurement value and the pressure correction value of the second sensor are used even when the pressure measurement value cannot be received from the terminal sensor due to the failure of the first sensor or the disconnection of the communication line. Thus, the pressure in the water pipe at the position of the end sensor can be maintained at the target pressure.

  The water supply system which concerns on the 3rd aspect of this invention is a water supply system which concerns on a 2nd aspect, Comprising: The said 2nd sensor is closer to the said pump than the said 1st sensor on the pipe line of the said water pipe Located in position.

  According to this configuration, even if the pressure measurement value cannot be received from the first sensor due to the failure of the first sensor or the disconnection of the communication line, the pressure measurement value and the pressure correction value of the second sensor. Can be used to maintain the pressure in the water pipe at the position of the first sensor at the target pressure.

  The water supply system which concerns on the 4th aspect of this invention is a water supply system which concerns on a 2nd aspect, Comprising: The said 2nd sensor is arrange | positioned at the discharge side of the said pump, and the water discharged | emitted from the said pump It is a sensor that detects pressure.

  According to this configuration, even when the pressure measurement value cannot be received from the first sensor due to the failure of the first sensor or the disconnection of the communication line, the pressure sensor is disposed on the discharge side of the pump and from the pump. The pressure in the water pipe at the position of the first sensor can be maintained at the target pressure by using the pressure measurement value and the pressure correction value of the sensor that detects the pressure of the discharged water.

  A water supply system according to a fifth aspect of the present invention is the water supply system according to any one of the first to fourth aspects, wherein the pressure measured by the second sensor and the pressure correction value stored in the storage device. Is a pressure obtained by adding the pressure correction value stored in the storage device to the pressure measured by the second sensor.

  According to this configuration, even if the pressure measurement value cannot be received from the first sensor due to the failure of the first sensor or the disconnection of the communication line, the pressure measurement value and the pressure correction value of the second sensor. Therefore, the pressure in the water pipe at the position of the first sensor can be maintained at the target pressure.

  A water supply system according to a sixth aspect of the present invention is the water supply system according to any one of the first to fifth aspects, wherein the plurality of sensors store different identification information, and the processor includes: Requesting a response to each of the plurality of sensors via the communication circuit, receiving a response output from the sensor in response to the request, the processor requesting the response and then each of the sensors From each of the plurality of sensors, a terminal sensor, which is a sensor provided at a position farthest from the pump on the pipe of the water pipe, is determined using each of the transmission delay times until the response is received.

  According to this configuration, since the processor can determine the end sensor from among a plurality of sensors without human intervention, when the current end sensor fails, the processor does not require human intervention. Terminal sensors can be set from the remaining sensor groups.

  A water supply system according to a seventh aspect of the present invention is the water supply system according to the sixth aspect, wherein the processor determines the sensor having the longest transmission delay time among the plurality of sensors as the end sensor. To do.

  According to this configuration, since the processor can determine the end sensor from among a plurality of sensors without human intervention, when the current end sensor fails, the processor does not require human intervention. Terminal sensors can be set from the remaining sensor groups.

  A water supply system according to an eighth aspect of the present invention is the water supply system according to any one of the first to seventh aspects, wherein the plurality of sensors store different identification information, and the processor includes: Using each pressure measurement value of the sensor, a terminal sensor, which is a sensor provided at a position farthest from the pump on the pipe of the water pipe, is determined.

  According to this configuration, since the processor can determine the end sensor from among a plurality of sensors without human intervention, when the current end sensor fails, the processor does not require human intervention. Terminal sensors can be set from the remaining sensor groups.

  A water supply system according to a ninth aspect of the present invention is the water supply system according to the eighth aspect, wherein the processor is configured to increase the pressure of the plurality of sensors in the process of gradually increasing the operating frequency of the pump. The sensor whose measured value has exceeded the target pressure latest is determined as the end sensor.

  According to this configuration, since the processor can determine the end sensor from among a plurality of sensors without human intervention, when the current end sensor fails, the processor does not require human intervention. Terminal sensors can be set from the remaining sensor groups.

  A water supply system according to a tenth aspect of the present invention is the water supply system according to the eighth aspect, wherein the processor has the latest target when there are two or more sensors that have exceeded the target pressure at the latest. Of the two or more sensors exceeding the pressure, the sensor having the lowest pressure measurement value is determined as the end sensor.

  According to this configuration, since the processor can determine the end sensor from among a plurality of sensors without human intervention, when the current end sensor fails, the processor does not require human intervention. Terminal sensors can be set from the remaining sensor groups.

  A water supply system according to an eleventh aspect of the present invention is the water supply system according to the eighth aspect, wherein the processor requests a response to each of the plurality of sensors via the communication circuit, and The processor receives a response output from the sensor in response to the request, and the processor has the two or more sensors that have exceeded the target pressure at the latest time, and the pressure measurement values of the two or more sensors are the same. In this case, among the two or more sensors that have exceeded the target pressure at the latest time, the sensor having the longest transmission delay time from when the response is requested until the response is received from each of the sensors is determined as the end sensor. .

  According to this configuration, since the processor can determine the end sensor from among a plurality of sensors without human intervention, when the current end sensor fails, the processor does not require human intervention. Terminal sensors can be set from the remaining sensor groups.

  A water supply system according to a twelfth aspect of the present invention is the water supply system according to the eighth aspect, wherein the processor requests a response to each of the plurality of sensors via the communication circuit, and The processor receives a response output from the sensor in response to the request, and the processor has the two or more sensors that have exceeded the target pressure at the latest time, and the pressure measurement values of the two or more sensors are the same. And when the transmission delay time from when the response is requested to when the response is received from each of the sensors is the same, the unique identification information of two or more sensors exceeding the target pressure at the latest is compared. To determine the end sensor.

  According to this configuration, since the processor can determine the end sensor from among a plurality of sensors without human intervention, when the current end sensor fails, the processor does not require human intervention. Terminal sensors can be set from the remaining sensor groups.

  A water supply system according to a thirteenth aspect of the present invention is the water supply system according to any one of the first to twelfth aspects, wherein the processor measures the pressure of the second sensor more than the first sensor. When the state where the value is low continues for longer than the set time or when more than the set number of times is detected, the difference in the pressure measurement value between the second sensor and the third sensor included in the plurality of sensors The pressure correction value stored in the storage device is updated, and when the processor can receive the pressure measurement value from the second sensor, the pressure measurement value measured by the second sensor matches the target pressure. If the rotation speed of the pump is controlled so that the pressure measurement value cannot be received from the second sensor, the pressure measured by the third sensor and the updated pressure correction value stored in the storage device, Based on Pressure determined Te controls the rotational speed of the pump to match the target pressure.

  According to this configuration, the pressure of the second sensor is measured more than the first sensor due to narrowing of a part of the pipe of the water pipe due to aging or the like, or deposits on the inner wall of the water pipe. Even when the value becomes low, the number of revolutions of the pump can be controlled based on the pressure measurement value of the second sensor, and when the second sensor fails, based on the pressure measurement value of the third sensor. The number of revolutions of the pump can be controlled. Thereby, after the aging deterioration, even if the sensor used in the operation control of the pump is updated and the updated sensor breaks down thereafter, the operation control of the pump can be continued.

  A water supply system according to a fourteenth aspect of the present invention is the water supply system according to any one of the first to thirteenth aspects, wherein each of the plurality of sensors measures a pressure of water in the water pipe. And a temperature detector that measures the temperature of the pressure detector, and the processor is configured to set a temperature measurement value by the temperature detector included in the first sensor to a preset temperature. The pump rotation speed is controlled such that the pressure measurement value measured by the first sensor matches the target pressure, and the temperature measurement value by the temperature detector included in the first sensor is When the preset temperature exceeds a preset temperature, the pump is set so that the pressure determined based on the pressure measured by the second sensor and the pressure correction value stored in the storage device matches the target pressure. Times To control the number.

  According to this configuration, when the temperature of the pressure detector included in the first sensor rises above the set temperature, the pressure measurement error increases and the end pressure deviates from the target pressure. The end pressure can be maintained at the target pressure by controlling the rotation speed of the pump so that the end pressure matches the target pressure using the pressure measurement values of the two sensors. In addition, when the temperature of the pressure detector exceeds the set temperature, a failure of the pressure detector is suspected, but a sensor for measuring a pressure measurement value used for controlling the pump early is changed from the first sensor to the second sensor. By switching to the sensor, it is possible to prevent a situation in which the operation control of the pump cannot be continued.

  A water supply system according to a fifteenth aspect of the present invention is the water supply system according to any one of the first to fifteenth aspects, wherein the communication circuit includes a serial communication and a LAN network for directly connecting the sensor and a communication line. It communicates with the sensor by Ethernet communication via the power line, power line communication via the power line, or wireless communication.

  According to this configuration, the communication circuit can communicate with the sensor.

  A water supply apparatus according to a sixteenth aspect of the present invention is a first sensor among a plurality of sensors provided at different positions on a pipe line of a water pipe communicating with a pump and measuring the pressure of water in the water pipe. And a difference in pressure measurement value between the plurality of sensors and a second sensor located closer to the pump than the first sensor at a distance of the water pipe, and the pipe of the water pipe Is a water supply device that can refer to a storage device that stores a difference between pressure measurement values measured in a closed state, and a communication circuit that communicates with each of the plurality of sensors; A processor that requests a pressure measurement value obtained by measurement for each sensor, and controls to receive the pressure measurement value output from the sensor in response to the request, the processor comprising: When the pressure measurement value can be received from the first sensor, the number of revolutions of the pump is controlled so that the pressure measurement value measured by the first sensor matches the target pressure, and the pressure is measured from the first sensor. If reception is not possible, the rotational speed of the pump is controlled so that the pressure determined based on the pressure measured by the second sensor and the difference stored in the storage device matches the target pressure.

  According to this configuration, even if the pressure measurement value cannot be received from the first sensor due to the failure of the first sensor or the disconnection of the communication line, the pressure measurement value and the pressure correction value of the second sensor. And the pressure in the water pipe at the position of the first sensor can be maintained at the target pressure. For this reason, even if the first sensor that measures the pressure measurement value used in the operation control of the pump fails, the operation control of the pump can be continued.

  According to one aspect of the present invention, even when the pressure measurement value cannot be received from the first sensor due to the failure of the first sensor or the disconnection of the communication line, the pressure measurement value of the second sensor By using the pressure correction value, the pressure in the water pipe at the position of the first sensor can be maintained at the target pressure. For this reason, even if the first sensor that measures the pressure measurement value used in the operation control of the pump fails, the operation control of the pump can be continued.

It is a schematic block diagram of the water supply system which concerns on a comparative example. It is a schematic block diagram of the water supply system which concerns on 1st Embodiment. It is a schematic block diagram which shows the function structure of the water supply system which concerns on 1st Embodiment. It is a graph showing the relationship between the discharge pressure of a pump, and the amount of water supply. It is a schematic diagram which shows the measuring method of propagation delay time. It is a flowchart which shows an example of the flow of the 1st example of a process of the terminal sensor automatic setting function. It is a flowchart which shows an example of the flow of the 2nd example of a process of a terminal sensor automatic discrimination | determination function. It is a flowchart which shows an example of the flow of the modification of the process of step S216 of FIG. It is a block diagram which shows schematic structure of the sensor which concerns on a modification. It is a schematic block diagram of the water supply system which concerns on 2nd Embodiment. It is a schematic block diagram of the water supply system which concerns on 3rd Embodiment. It is a schematic block diagram of the water supply system which concerns on 4th Embodiment. It is a schematic diagram which shows an example of a star type | mold network form. It is a schematic diagram which shows an example of a ring type network form. It is a schematic diagram which shows an example of a tree-type network form. It is a schematic diagram which shows an example of a mesh type | mold network form.

  First, in order to better understand each embodiment, a comparative example to be compared with this embodiment will be described. FIG. 1 is a schematic configuration diagram of a water supply system according to a comparative example. As shown in FIG. 1, the water supply system 900 includes a water supply device 901, a city water inflow pipe P <b> 1 communicating with the suction port of the water supply device 901, and a water pipe P <b> 2 communicating with the discharge port of the water supply device 901. Further, the water supply system 900 includes water supply taps B1 to B19 communicating with the water pipe P2, and a sensor S20 provided in the water pipe near the discharge port of the water supply apparatus 901 and connected to the water supply apparatus 901 via the signal line W1. Is provided. The sensor 20 is a pressure sensor and measures the pressure of water in the water pipe near the discharge port of the water supply apparatus 901.

  The water supply device 901 includes a pump 911, a motor 912 as a drive source for driving the pump 911, an inverter 913 as a drive device for driving the motor 912 at a variable speed, and a control device 914 for controlling the inverter 913. . The control device 914 estimates the water pressure at the end of the water pipe (hereinafter also referred to as end pressure) using the pressure detected by the sensor S20, and controls the inverter 913 so that the end pressure is constant.

  In the water supply system according to this comparative example, when the sensor S20 fails, there is a problem that the inverter 913 cannot be controlled so that the terminal pressure becomes constant.

<First Embodiment>
On the other hand, in 1st Embodiment, in order to solve this problem, when a water supply system is provided with a some sensor and a control apparatus can receive pressure from a terminal sensor, the pressure measurement value which the said terminal sensor measures The number of revolutions of the pump is controlled so as to match the target pressure. On the other hand, when the control device cannot receive pressure from the end sensor, the difference between the pressure measured by the sensor located at a position closer to the pump than the end sensor on the pipe of the water pipe among the plurality of sensors and the pressure measurement value The number of revolutions of the pump is controlled so that the pressure determined based on the value matches the target pressure.

  Hereinafter, a first embodiment will be described with reference to the drawings. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  FIG. 2 is a schematic configuration diagram of the water supply system according to the first embodiment. The water supply system 100 includes a water supply device 1, a city water inflow pipe P <b> 1 that communicates with a suction port of the water supply device 1, and a water pipe P <b> 2 that communicates with a discharge port of the water supply device 1. Further, the water supply system 100 is provided with the water taps B1 to B19 communicating with the water pipe P2 and the water pipes P2 in the vicinity of the discharge port of the water supply apparatus 1 and connected to the water supply apparatus 1 via the signal line W1 ( (Also referred to as a discharge pressure sensor) S20. The sensor S <b> 20 is a pressure sensor and is a sensor that is disposed on the discharge side of the pump 11 and detects the pressure of water discharged from the pump 11. In this embodiment, the pressure of the water in the water pipe P2 near the discharge outlet of the water supply apparatus 1 is measured as an example. These configurations are the same as in the comparative example.

  The water supply system 100 is different from the comparative example in that it includes sensors (also referred to as remote sensors) S1 to S19 that communicate with the water supply apparatus 1. The sensors S1 to S19 are provided on the same network as an example. The sensors S1 to S19 are provided at different positions on the pipe of the water pipe P2 communicating with the pump 11, and measure the pressure of water in the water pipe P2. Further, the sensors S1 to S19 are provided at positions farther from the pump 11 than the sensor S20 on the pipe of the water pipe. Specifically, the sensors S1 to S19 are provided in the vicinity of the corresponding water taps B1 to B19 of the water pipe, and the water pressure in the water pipe in the vicinity of the corresponding water taps B1 to B19 (hereinafter also referred to as water pressure). Measure). Each of the sensors S <b> 1 to S <b> 19 is connected to the water supply apparatus 1 via the communication line L <b> 1 and can transmit a pressure measurement value to the water supply apparatus 1 via the communication line L <b> 1.

  The water supply apparatus 1 includes a pump 11, a motor 12 as a drive source that drives the pump 11, an inverter 13 as a drive apparatus that drives the motor 12 at a variable speed, and a control device 14 that controls the inverter 13. . The configurations of the pump 11, the motor 12, and the inverter 13 are the same as those in the comparative example. On the other hand, the control content of the control device 14 is different from the comparative example.

  FIG. 3 is a schematic block diagram illustrating a functional configuration of the water supply system according to the first embodiment. As shown in FIG. 3, the sensor S <b> 1 includes a pressure detector 21, a storage device 22, a processor 23, and a communication circuit 24. Similarly, the sensor S <b> 2 includes a pressure detector 31, a storage device 32, a processor 33, and a communication circuit 34. Since the sensors S1 to S19 have the same configuration, the sensor S1 will be described below as a representative.

  The pressure detector 21 is, for example, a pressure sensor that detects pressure. The pressure detector 21 may convert the pressure based on the flow rate detected by the flow sensor, the outflow coefficient, the flow path area, and the flow velocity, or may convert the pressure based on the valve opening detected by the valve opening sensor. Alternatively, the pressure may be converted from the amount of water detected by a water meter.

  The storage device 22 stores unique identification information different from unique identification information (also referred to as a unique ID) set for other sensors. Here, as an example in the present embodiment, the unique ID is set to the sensors S <b> 1 to S <b> 19 so that the distance on the pipeline of the water pipe P <b> 2 increases from the water supply device 1. The processor 23 is a microprocessor, for example, and controls the communication circuit 24. The communication circuit 24 communicates with the water supply apparatus 1.

<Configuration of control device 14>
As illustrated in FIG. 3, the control device 14 includes a storage device 141, a processor 143, and a communication circuit 144. The processor 143 has a timer 142.

  The storage device 141 stores in advance the number of sensors and unique identification information of a terminal sensor (here, sensor S1 as an example) installed at the extreme end on the pipe of the water pipe P2. Accordingly, the processor 143 can determine that the sensor S1 is a terminal sensor, and can acquire the pressure measurement value measured by the sensor S1 from the sensor S1 as the terminal pressure.

  Further, the storage device 141 is a pressure correction value that is a difference in pressure measurement values between the sensor S1 and the sensors S2 to S19 and that is measured in a state where the pipe of the water pipe P2 is closed. Remember as. Thereby, this sensor S1 is a terminal sensor which is a sensor provided in the position farthest from the pump 11 on the pipe line of the water pipe P2 among the plurality of sensors S1 to S19.

  Further, in the present embodiment, as an example, the sensor S2 is a second terminal sensor that is a sensor provided at a position second away from the pump 11 on the pipe of the water pipe P2 among the plurality of sensors S1 to S19. The fact that the sensor S2 is the second end sensor is set in advance in the storage device 141 of the water supply apparatus 1, for example.

  Timer 142 counts the count. The processor 143 is connected to the storage device 141 and the communication circuit 144 and controls the communication circuit 144. The processor 143 is, for example, a microprocessor. The communication circuit 144 communicates with each of the plurality of sensors S1 to S20.

The control of the control device 14 will be described with reference to FIG. FIG. 4 is a graph showing the relationship between the pump discharge pressure and the amount of water supply. As shown by the arrow A1, by changing the rotation speed of the pump 11 (that is, the rotation speed of the motor 12), the relationship between the discharge pressure of the pump 11 and the water supply amount is the relationship between the pump discharge pressure and the water supply amount. It changes between the curves F1 to F3 that it represents.
The control device 14 controls the rotation speed of the pump so that the pressure measurement value of the sensor S1, which is the end sensor, matches the target pressure. Thereby, according to the amount of water absorption to be used, the discharge pressure of a pump can be adjusted and the water pressure of the terminal of the water pipe P2 can be made constant.

  When the processor 143 can receive the pressure measurement value from the sensor S1 that is the terminal sensor among the plurality of sensors S1 to S19, the processor 143 pumps the pressure measurement value measured by the sensor S1 that is the terminal sensor to match the target pressure. 11 is controlled.

  On the other hand, if the processor 143 cannot receive the pressure measurement value from the sensor S1 as the end sensor, the processor 143 determines the pressure based on the pressure measured by the sensor S2 as the second end sensor and the pressure correction value stored in the storage device 141. The rotational speed of the pump 11 is controlled so that the applied pressure matches the target pressure. At that time, the processor 143 controls the inverter 13 to control the rotation speed of the pump 11. Here, a 2nd terminal sensor is a sensor provided in the position which left | separated 2nd from the pump 11 on the pipe line of the water pipe P2 among several sensor S1-S19.

  At this time, the processor 143 updates the unique ID of the end sensor stored in the storage device 141 with the unique ID of the sensor S2 which is the second end sensor. Further, the storage device 141 stores in advance the pressure difference between the second end sensor and the third end sensor S3 during the shut-off operation of the water pipe P2, and the processor 143 stores the shut-off of the water pipe P2. The pressure correction value stored in the storage device 141 may be updated with the pressure difference between the sensor S2 as the second terminal sensor and the sensor S3 as the third terminal sensor during operation. Here, a 3rd terminal sensor is a sensor provided in the position which left | separated 3rd from the pump 11 on the pipe line of the water pipe P2 among several sensors S1-S19.

  Thereby, when the processor 143 can receive the pressure measurement value from the second end sensor, the processor 143 controls the rotation speed of the pump 11 so that the pressure measurement value measured by the second end sensor matches the target pressure, When the pressure measurement value cannot be received from the second end sensor, the pressure determined based on the pressure measured by the third end sensor and the pressure correction value stored in the storage device 141 matches the target pressure. The rotational speed of the pump 11 may be controlled. Here, the pressure determined based on the pressure measured by the second end sensor (here, sensor S2 as an example) and the pressure correction value stored in the storage device 141 is the second end sensor (here, one example). As a pressure obtained by adding the pressure correction value stored in the storage device 141 to the pressure measured by the sensor S2).

  As described above, the difference between the pressure measurement values between the first end sensor and the second end sensor is stored in advance as a pressure correction value, so that even if the end sensor fails, the second end sensor is stored. By adding the pressure correction value to the measured pressure value, the measured pressure value of the end sensor can be estimated, and the rotational speed of the pump 11 can be controlled so that the estimated pressure matches the target pressure. it can. Thereby, even when the end sensor fails, the water pressure at the target position of the water pipe P2 can match the target pressure.

<Communication specifications between water supply device and sensors S1 to S19>
Between the water supply apparatus 1 and the sensors S1 to S19, there is a master-slave relationship, which starts with transmission from the water supply apparatus 1, and the sensors S1 to S19 constantly exchange response data with respect to transmission data from the water supply apparatus. . The number of transmissions from the water supply device and the number of responses from the sensors S1 to S19 are basically in a one-to-one relationship. However, the water supply apparatus 1 also has a broadcast transmission function that transmits the same data to all the sensors S1 to S19 at the same time.

<First example of automatic terminal sensor discrimination function>
Subsequently, a first example of the terminal sensor automatic discrimination function will be described. The processor 143 of the water supply apparatus 1 measures the transmission delay time for the sensors S1 to S19 on the same network. FIG. 5 is a schematic diagram showing a method for measuring the propagation delay time. In FIG. 5, the flow of communication between sensor S1 and water supply apparatus 1 and the flow of communication between sensor S2 and water supply apparatus 1 are shown as an example.

  As shown in FIG. 5, the processor 143 of the water supply apparatus 1 transmits fixed data for measuring the transmission delay time to the individual sensors S1 to S19. The sensors S <b> 1 to S <b> 19 that have received the fixed data transmit the same fixed data for measuring the transmission delay time as the received data to the water supply apparatus 1. In the example of FIG. 5, as an example, this transmission and reception set processing is repeated twice.

  The processor 143 of the water supply apparatus 1 measures the transmission delay time from the start of transmission of fixed data to the completion of reception of fixed data from each of the sensors S1 to S19, using the timer count of the timer 142, and saves it in the storage device 141. . Specifically, for example, as shown in FIG. 5, the processor 143 of the water supply apparatus 1 ends the count of the timer 142 immediately after repeating the transmission and reception set processing twice, and delays the transmission of the count value. The time is stored in the storage device 141. By performing transmission / reception processing of fixed data between the water supply device and the sensor, the time taken for other than the transmission delay time becomes equal for all the sensors, so that the transmission delay time can be compared between the sensors.

  In the example of FIG. 5, the count value 300 is stored as the transmission delay time for the sensor S1, and the count value 260 is stored as the transmission delay time for the sensor S2. Thus, since the communication line L1 is routed along the water pipe P2, the processor 143 can determine that the sensor S1 is farther from the water supply apparatus 1 on the pipe of the water pipe P2 than the sensor S2. is there.

  The plurality of sensors S1 to S19 according to the present embodiment store different pieces of identification information, and the processor 143 requests a response to each of the plurality of sensors S1 to S19 via the communication circuit 144, and A response output from the sensor is received upon request. Then, the processor 143 determines the end sensor by using each of the transmission delay times from requesting this response until receiving the response from each of the sensors S1 to S19. Specifically, the processor 143 determines the sensor having the longest transmission delay time among the plurality of sensors S1 to S19 as the end sensor.

  With this configuration, the processor 143 can determine the end sensor from among the plurality of sensors S1 to S19 without manual intervention. Therefore, when the current end sensor fails, the processor 143 can The end sensor can be set from the remaining sensor groups without intervention.

  Note that the processor 143 of the water supply apparatus 1 repeatedly performs, for example, the transmission delay time measurement process for all the sensors S1 to S19 more than the predetermined number of times of transmission delay time measurement, and represents a representative value of the transmission delay time (for example, an average value) The sensor having the largest value (median value, maximum value, minimum value, etc.) may be determined as the end sensor installed at the end on the pipe of the water pipe P2 and detecting the end pressure.

<Processing of the first example of the terminal sensor automatic discrimination function (automatic initialization function)>
Next, the processing flow of the terminal sensor automatic discrimination function will be described with reference to FIG. FIG. 6 is a flowchart showing an example of the flow of a first example of processing of the terminal sensor automatic discrimination function.

  (Step S101) First, the timer 142 starts counting.

  (Step S102) Next, the processor 143 stores the count value before communication using the count of the timer 142.

  (Step S103) Next, the processor 143 transmits the fixed data for automatic extraction of the end sensor to the target sensor for measuring the transmission delay time.

  (Step S104) Next, the processor 143 receives response data from the target sensor and counts up the number of communications.

  (Step S105) Next, it is determined whether or not the communication count has exceeded a preset transmission delay measurement count threshold value (1 in the example of FIG. 5). When the communication count does not exceed the preset transmission delay measurement count threshold (No), the processor 143 returns to the process of step S102 and executes the processes of steps S102 to S104 again.

  (Step S106) On the other hand, in step S105, when the number of communications exceeds a preset transmission delay measurement count threshold (Yes), the processor 143 stores the count value of the timer 142 count as the post-communication count value. .

  (Step S107) Next, the processor 143 calculates a transmission delay time from the difference between the pre-communication count value and the post-communication count value. A value obtained by subtracting the pre-communication count value from the post-communication count value may be used as the transmission delay time.

  (Step S108) Next, the processor 143 stores the transmission delay time in the storage device 141.

  (Step S109) Next, the processor 143 switches the communication target sensor (that is, the target sensor for measuring the transmission delay time).

  (Step S110) Next, it is determined whether or not the transmission delay times of all the sensors S1 to S19 have been measured.

  (Step S111) When the transmission delay times of all the sensors have not been measured (No), the processor 143 resets the number of communications, returns to Step S102, and repeats the processes of Steps S102 to S109 for the target sensor after switching. .

  (Step S112) When the transmission delay times of all the sensors have been measured in Step S110 (Yes), the processor 143 extracts the sensor having the longest transmission delay time from all the sensors S1 to S19 as the end sensor. .

  (Step S113) Next, the processor 143 stores the sensor with the longest transmission delay time as the end sensor, and stores the unique ID of the sensor with the longest transmission delay time as the unique ID of the end sensor in the storage device.

  In this way, the processor 143 can determine the end sensor from among the plurality of sensors S1 to S19 without the need for human intervention. Therefore, when the current end sensor fails, the processor 143 requires manual intervention. The terminal sensor can be set from the remaining sensor groups without any problem.

  The processor 143 may set a remote sensor having the second largest transmission delay as the second end sensor during the end sensor automatic discrimination processing.

<About the second example of the terminal sensor automatic discrimination function>
Subsequently, a second example of the terminal sensor automatic discrimination function will be described. The processor 143 of the water supply apparatus 1 operates the pump 11 with the pipe line of the water pipe P2 closed, and gradually accelerates the operating frequency of the pump 11 to be operated from the lowest frequency to the highest frequency, among the sensors S1 to S19. , The sensor whose pressure measurement value measured by each of the sensors S1 to S19 is the slowest sensor that rises above the target pressure required at the end of the water pipe P2, is the terminal that is installed at the end on the pipe and detects the end pressure It is determined as a sensor.

  Thus, the plurality of sensors store different identification information, and the processor 143 is provided at a position farthest from the pump 11 on the pipe of the water pipe P2 using each pressure measurement value of the sensor. The end sensor, which is the selected sensor, is determined. Specifically, in the process of gradually increasing the operating frequency of the pump 11, the processor 143 determines the sensor having the latest measured pressure value that has exceeded the target pressure among the plurality of sensors S <b> 1 to S <b> 19 as the end sensor.

  With this configuration, the processor 143 can determine the end sensor from the plurality of sensors S1 to S19 without any manual intervention. Therefore, if the current end sensor fails, the processor 143 can The end sensor can be set from the remaining sensor groups without intervention.

<About the pump operating frequency in the terminal sensor automatic discrimination function>
In the terminal sensor automatic discrimination function, the pump operation frequency is gradually accelerated from 0 Hz to a preset maximum frequency every predetermined period (operation frequency update period) during the pump operation. The operating frequency update cycle is, for example, a cycle that is at least twice the pressure detection cycle for terminal sensor automatic discrimination.

<Processing Flow of Second Example of Automatic Terminal Sensor Discrimination Function>
Next, the processing flow of the terminal sensor automatic discrimination function will be described with reference to FIG. FIG. 7 is a flowchart showing an example of the flow of the second example of the process of the terminal sensor automatic discrimination function.

  (Step S201) First, the processor 143 of the water supply apparatus 1 transmits a terminal sensor automatic discrimination function start notification to all of the sensors S1 to S19 by broadcast communication.

  (Step S202) Next, the processor 143 of the water supply apparatus 1 initializes the operation frequency update period count and starts the pump operation.

  (Step S203) Next, the processor 143 of the water supply apparatus 1 initializes the unique ID of the communication target sensor and the number of times of terminal pressure detection, and increments the operating frequency update cycle count by one.

  (Step S204) Next, it is determined whether or not the operation frequency update cycle count has exceeded a preset operation frequency update cycle. When the operation frequency update cycle count does not exceed the preset operation frequency update cycle (No), the process proceeds to step S207.

  (Step S205) In step S204, when the operation frequency update period count exceeds the preset operation frequency update period (Yes), the processor 143 of the water supply apparatus 1 accelerates the operation frequency of the pump.

  (Step S206) Next, the operation frequency update cycle count is initialized.

  (Step S207) Next, the processor 143 of the water supply apparatus 1 waits for the end sensor automatic discrimination pressure detection cycle to elapse.

  (Step S208) Next, the processor 143 of the water supply apparatus 1 acquires a pressure measurement value (also referred to as a pressure detection result) from the communication target sensor among the sensors S1 to S19.

  (Step S209) Next, the processor 143 of the water supply apparatus 1 determines whether or not the pressure detection result exceeds the target pressure. If the pressure detection result does not exceed the target pressure, the process proceeds to step S211.

  (Step S210) When the pressure detection result exceeds the target pressure in step S209, the processor 143 of the water supply apparatus 1 turns on the terminal pressure detection flag of the communication target sensor and increases the number of terminal pressure detections by one.

  (Step S211) Next, the processor 143 of the water supply apparatus 1 switches the communication target sensor.

  (Step S212) Next, the processor 143 of the water supply apparatus 1 determines whether or not pressure detection results have been acquired from all of the sensors S1 to S19. When pressure detection results are not acquired from all of the sensors S1 to S19, the process returns to step S208, and steps S208 to S210 are executed for the sensor after switching.

  (Step S213) In this embodiment, the target pressure detection flag of the previous cycle is for each of the sensors S1 to S19, and the target pressure detection flag of the current cycle is also for each of the sensors S1 to S19. The processor 143 of the water supply apparatus 1 compares the target pressure detection flag of the previous cycle with the corresponding target pressure detection flag of the current cycle, and from the sensors S1 to S19, the processor 143 exceeds the target pressure in the current cycle. The detected sensor (remote sensor) is extracted.

  (Step S214) Next, the processor 143 of the water supply apparatus 1 copies the corresponding current target pressure detection flag to each of the previous target pressure detection flags.

  (Step S215) Next, the processor 143 of the water supply apparatus 1 determines whether or not the target pressure detection flags of all the remote sensors are on. When the target pressure detection flags of all the remote sensors are not on (No), the process returns to step S203, and the processor 143 of the water supply apparatus 1 repeats the processes of steps S203 to S214.

  (Step S216) When the target pressure detection flags of all the remote sensors are ON in Step S215 (Yes), the processor 143 of the water supply apparatus 1 executes a terminal sensor determination process. Specifically, the processor 143 of the water supply apparatus 1 determines the sensor that has risen above the target pressure in the last cycle as the end sensor.

  (Step S217) Next, the processor 143 of the water supply apparatus 1 stores in the storage device 141 the unique ID of the end sensor determined in step S216 and the pressure difference between the pressure measurement values of all the remote sensors and the end pressure. Here, the end pressure is a pressure measurement value measured by the end sensor determined in step S216.

  (Step S218) Next, the processor 143 of the water supply apparatus 1 stops the pump 11.

  In this way, the processor 143 can determine the end sensor from among the plurality of sensors S1 to S19 without the need for human intervention. Therefore, when the current end sensor fails, the processor 143 requires manual intervention. The terminal sensor can be set from the remaining sensor groups without any problem.

<Modified example of the terminal sensor automatic discrimination function>
Subsequently, a modified example of the terminal sensor automatic discrimination function will be described. For example, the processor 143 of the water supply apparatus 1 may start the terminal sensor automatic determination function by transmitting a terminal sensor automatic determination function start notification to all the sensors S1 to S19. Since the end sensor automatic discrimination function start notification is transmitted by broadcast communication, when all the sensors S1 to S19 receive this end sensor automatic discrimination function start notification, a predetermined period (end sensor automatic discrimination) is determined from the time of reception. The pressure of water is measured in the pressure detection cycle. The pressure measurement result may be averaged according to the number of measurements. The processor 143 of the water supply apparatus 1 acquires the pressure measurement results from all of the sensors S1 to S19 within an interval of a certain period in which the pressure is detected by the sensor, and the pressure measurement results detected at the same time for all of the sensors S1 to S19. You may compare. The processor 143 of the water supply apparatus 1 determines, for example, the sensors (remote sensors) S1 to S19 whose timing of the pressure measurement result exceeding the target pressure is the slowest as the terminal sensor installed at the terminal on the pipe of the water pipe P2. Also good.

  However, when the pressure measurement result of two or more remote sensors rises above the target pressure within the same pressure detection cycle for terminal sensor automatic discrimination, and there are two or more remote sensors to be distinguished from terminal sensors, the water supply device 1 The processor 143 may determine the remote sensor with the lowest pressure measurement result as the end sensor. Further, when the pressure measurement results are equal, the processor 143 of the water supply apparatus 1 may use a remote sensor with a small transmission delay time measured in advance as the end sensor. When the pressure measurement result is equal to the transmission delay time, the processor 143 of the water supply apparatus 1 may determine the end sensor having the larger unique ID.

  A processing flow of a modified example of the terminal sensor automatic discrimination function will be described with reference to FIG. FIG. 8 is a flowchart showing an example of the flow of a modification of the process of step S216 of FIG.

  (Step S301) First, the processor 143 of the water supply apparatus 1 sets the target pressure detection flag of the previous (that is, the second from the last) set for each of the sensors (remote sensors) S1 to S19, and this time (that is, the last). Is compared with the target pressure detection flag of the current cycle, and it is determined whether or not there are a plurality of current cycle new flag on numbers, which is the number of times the target pressure detection flag is turned on in the current (ie, last) cycle.

  (Step S302) If there are a plurality of current cycle new flag ON numbers in Step S301 (Step S301 Yes), remote sensors whose target pressure detection flag is ON in the current (ie, last) cycle are set as end sensor candidates, and these end Acquire pressure detection results of all remote sensors as sensor candidates.

  (Step S303) On the other hand, when the current cycle new flag ON number is 1 in Step S301 (No in Step S301), the end sensor is determined as the remote sensor whose target pressure detection flag is turned ON in the current (ie, last) cycle. To do.

  (Step S304) After step S302, the processor 143 of the water supply apparatus 1 determines whether or not the pressure detection results of the end sensor candidates acquired in step S302 are all equal.

  (Step S305) When all the pressure detection results of the end sensor candidates are equal in Step S304 (Yes in Step S304), the processor 143 of the water supply apparatus 1 acquires the transmission delay time of all the remote sensors of the end sensor candidates.

  (Step S306) When the pressure detection results of the end sensor candidates are not all equal in Step S304 (No in Step S304), the processor 143 of the water supply apparatus 1 selects the end sensor as the most end sensor candidate. Decide on a low remote sensor.

  (Step S307) After step S305, the processor 143 of the water supply apparatus 1 determines whether or not the transmission delay times of the end sensor candidates acquired in step S305 are all equal.

  (Step S308) When all the transmission delay times of the end sensor candidates are equal in Step S307 (Step S307 Yes), the processor 143 of the water supply apparatus 1 determines the end sensor as a remote sensor having the largest unique ID among the end sensor candidates. To do. As described above, in the present embodiment, as an example, since the unique ID is set in the sensors S1 to S19 so that the distance on the pipe of the water pipe P2 is far from the water supply device 1, the remote having the largest unique ID is set. By selecting a sensor, the sensor whose distance on the pipe of the water pipe P2 is the farthest from the water supply apparatus 1 among the sensors S1 to S19 can be determined as the end sensor.

  (Step S309) When the transmission delay times of the terminal sensor candidates are not all equal in Step S307 (No at Step S307), the processor 143 of the water supply apparatus 1 sets the terminal sensor as the most transmission delay time among the terminal sensor candidates. The remote sensor is determined to be large.

  Thus, when there are two or more sensors that have exceeded the target pressure at the latest, the processor 143 determines the sensor having the lowest pressure measurement value among the two or more sensors that have exceeded the target pressure at the latest as the end sensor. You may decide to. As a result, the processor 143 can determine the end sensor from among the plurality of sensors S1 to S19 without any manual intervention. Therefore, when the current end sensor fails, the processor 143 requires the manual intervention. The terminal sensor can be set from the remaining sensor groups without any problem.

  As described above, the processor 143 requests a response to each of the plurality of sensors S1 to S19 via the communication circuit 144 and receives a response output from the sensor in response to the request. The following may be used. That is, when there are two or more sensors that have exceeded the target pressure at the latest and the pressure measurement values of the two or more sensors are the same, the processor 143 has two or more sensors that have exceeded the target pressure at the latest. Among them, the sensor having the longest transmission delay time from when a response is requested until the response is received from each sensor may be determined as the end sensor. As a result, the processor 143 can determine the end sensor from among the plurality of sensors S1 to S19 without any manual intervention. Therefore, when the current end sensor fails, the processor 143 requires the manual intervention. The terminal sensor can be set from the remaining sensor groups without any problem.

  Alternatively, the processor 143 receives the response from each of the sensors after two or more sensors that have exceeded the target pressure at the latest and the pressure measurement values of the two or more sensors are the same, and the response is requested. If the transmission delay time is the same, the end sensor may be determined by comparing the unique identification information of two or more sensors that exceeded the target pressure at the latest. As a result, the processor 143 can determine the end sensor from among the plurality of sensors S1 to S19 without any manual intervention. Therefore, when the current end sensor fails, the processor 143 requires the manual intervention. The terminal sensor can be set from the remaining sensor groups without any problem.

<End sensor automatic update function>
The processor 143 of the water supply apparatus 1 may have a terminal sensor automatic update function for automatically updating a terminal sensor installed at the terminal on the pipe of the water pipe P2. Specifically, the processor 143 of the water supply apparatus 1 detects that the pressure detected by the first sensor (for example, the sensor S1) is equal to or higher than the target pressure required at the end, and stops the pump while the pump is stopped. The pressure acquired from another second sensor (for example, sensor S5) rather than the pressure acquired from the first sensor (here, sensor S1 as an example) recognized as the end sensor installed at the end. Is lower than the preset setting time (also referred to as terminal sensor automatic update time), or detected more than the preset number of times (also referred to as terminal sensor automatic update number), You may switch the terminal sensor memorize | stored in the memory | storage device 141 from a 1st sensor (for example, sensor S1) to a 2nd sensor (for example, sensor S5).

Here, the terminal sensor automatic update time and the number of terminal sensor automatic updates are stored in advance in the storage device 142 and can be changed in the water supply apparatus 1.
When the processor 143 switches the terminal sensor to the second sensor, the processor 143 updates the unique ID of the terminal sensor stored in the storage device 141 with the unique ID of the second sensor, and each remote sensor, the second sensor, The pressure correction value stored in the storage device is updated with the difference in the pressure measurement value between the two.

  As described above, when the processor 143 detects that the pressure measurement value of the second sensor is lower than that of the first sensor for a longer time than the set time or more than the set number of times, the processor 143 determines the end sensor as the first sensor. The pressure correction stored in the storage device 141 by switching from the first sensor to the second sensor and the difference in the measured pressure value between the second sensor and the third sensors included in the plurality of sensors S1 to S19. The value may be updated. When the pressure measurement value can be received from the second sensor, the processor 143 controls the rotation speed of the pump 11 so that the pressure measurement value measured by the second sensor matches the target pressure. On the other hand, when the processor 143 cannot receive the pressure measurement value from the second sensor, the pressure determined based on the pressure measured by the third sensor and the updated pressure correction value stored in the storage device 141 is The number of revolutions of the pump is controlled to match the target pressure.

  With this configuration, the pressure of the second sensor is measured more than the first sensor due to narrowing of a part of the pipe of the water pipe P2 due to aging or the like, or deposits on the inner wall of the water pipe P2. Even when the value becomes low, the number of revolutions of the pump can be controlled based on the pressure measurement value of the second sensor, and when the second sensor fails, based on the pressure measurement value of the third sensor. The number of revolutions of the pump can be controlled. Thereby, after the aging deterioration, even if the sensor used in the operation control of the pump is updated and the updated sensor breaks down thereafter, the operation control of the pump can be continued.

<Modification of control>
When the terminal pressure can be acquired from the sensor S1 that is the terminal sensor, the processor 143 controls the operation of the pump 11 by the constant terminal pressure control method, and the failure of the sensor S1 that is the terminal sensor or the disconnection of the communication line L1. When the end pressure cannot be acquired, the pump 11 may be operated and controlled by an estimated end pressure constant control method that estimates the end pressure from the discharge pressure acquired from the sensor (discharge pressure sensor) S20.

<Modified example of sensor>
Next, modified examples of the sensors S1 to S19 will be described. FIG. 9 is a block diagram illustrating a schematic configuration of a sensor according to a modification. As shown in FIG. 9, the sensor Sb according to the modification has a configuration in which a temperature detector 45 connected to the processor 23 is added compared to the sensor S1. The temperature detector 45 detects the temperature of the pressure detector 21. That is, in the modified example, each of the plurality of sensors has a pressure detector that measures the pressure of water in the water pipe P2, and a temperature detector that measures the temperature of the pressure detector. In the modified example, the configuration of each of the plurality of sensors S1 to S19 has the configuration of the sensor Sb according to the modified example.

  The processor 23 of the sensor Sb transmits not only the pressure measurement value but also the temperature measurement value to the water supply device 1 in response to a request from the water supply device 1. Thereby, processor 143 of water supply apparatus 1 can acquire a temperature measurement value from each of a plurality of sensors.

  Then, the processor 143 of the water supply device 1 causes the pressure measurement value measured by the sensor S1 to match the target pressure when the temperature measurement value by the temperature detector 45 included in the sensor S1 falls within the preset temperature. When the temperature measured by the temperature detector 45 included in the sensor S1 exceeds the preset temperature, the pressure measured by the sensor S2 and the storage device 22 are stored. The rotational speed of the pump 11 is controlled so that the pressure determined based on the pressure correction value matches the target pressure.

  With this configuration, when the temperature of the pressure detector 21 included in the sensor S1 rises above the set temperature, the pressure measurement error increases and the terminal pressure deviates from the target pressure, but another sensor S2 The end pressure can be maintained at the target pressure by controlling the number of rotations of the pump so that the end pressure matches the target pressure. When the temperature of the pressure detector 21 exceeds the set temperature, a failure of the pressure detector 21 is suspected, but a sensor for measuring a pressure measurement value used for controlling the pump 11 as soon as possible is changed from the sensor S1 to the sensor S2. By switching to, it is possible to prevent a situation in which the operation control of the pump 11 cannot be continued.

The temperature detector 45 measures the temperature of the pressure detector 21, but is not limited to this, and the temperature of the other devices in the sensor Sb such as the temperature of the processor 23, the temperature of the communication circuit 24, or the housing of the sensor Sb. The temperature inside the body may be measured. Thus, the temperature detector 45 may measure any temperature of the sensor S1.
The pressure detector 21 may be a flow rate detector that measures the flow rate of water.

  In this embodiment, the processor 143 switches the sensor for measuring the pressure measurement value used for control from the sensor S1 to the sensor S2 (that is, switches from the terminal sensor to the second terminal sensor). It is not limited to. The processor 143 may switch the sensor that measures the pressure measurement value used for the control from the sensor (terminal sensor) S1 to any one of the sensors S3 to S19. Alternatively, the processor 143 changes the sensor that measures the pressure measurement value originally used for control to one of the sensors S2 to S19 (that is, a specific sensor other than the end sensor) instead of the sensor S1 (that is, the end sensor). May be. In that case, the processor 143 may switch the sensor that measures the pressure measurement value used for control from the specific sensor other than the terminal sensor to a sensor other than the specific sensor including the sensor (terminal sensor) S1.

As described above, in the present embodiment, the storage device 141 is configured such that the pressure between the first sensor among the plurality of sensors and the second sensor different from the first sensor among the plurality of sensors S1 to S19. You may memorize | store the difference of the pressure measurement value measured in the state which is the difference of a measured value and the pipe line of the water pipe P2 closed as a pressure correction value.
And the processor 143 of the water supply apparatus 1 controls the rotation speed of the pump 11 so that the pressure measurement value measured by the first sensor matches the target pressure when the pressure measurement value can be received from the first sensor. When the pressure measurement value cannot be received from the first sensor, the pump pressure is determined so that the pressure determined based on the pressure measured by the second sensor and the pressure correction value stored in the storage device 141 matches the target pressure. Control the number of revolutions.

As illustrated in the present embodiment, the first sensor is preferably a terminal sensor.
The second sensor is preferably located at a position closer to the pump 11 than the first sensor on the pipe of the water pipe P2. For example, when the first sensor is a terminal sensor, the second sensor is preferably positioned closer to the pump 11 than the terminal sensor on the pipe of the water pipe P2. In particular, when the first sensor is an end sensor, it is more preferable that the second end sensor be a sensor provided at a position second away from the pump 11 on the pipe of the water pipe P2.

  When the pressure measurement value can be received from the first sensor, the processor 143 controls the rotation speed of the pump 11 so that the pressure measurement value measured by the first sensor matches the target pressure, and the first sensor If the pressure measurement value cannot be received from the pressure, the rotation speed of the pump 11 is set so that the pressure determined based on the pressure measured by the second sensor and the pressure correction value stored in the storage device 141 matches the target pressure. Control.

  With this configuration, even if the pressure measurement value cannot be received from the first sensor due to the failure of the first sensor or the disconnection of the communication line L1, the pressure measurement value and the pressure correction value of the second sensor Can be used to maintain the pressure in the water pipe at the position of the first sensor at the target pressure. For this reason, even if the first sensor that measures the pressure measurement value used in the operation control of the pump fails, the operation control of the pump can be continued.

<Second Embodiment>
Next, a second embodiment will be described. FIG. 10 is a schematic configuration diagram of a water supply system according to the second embodiment. The water supply system 200 according to the second embodiment is for a high-rise building. A water supply system 200 according to the second embodiment in FIG. 10 is connected to the first water supply device 201 directly connected to the city water inflow pipe P1 and the discharge side of the first water supply apparatus 201 via the water pipe P21. And a second water supply device 202. The 1st water supply apparatus 201 is for lower floors, and the 2nd water supply apparatus 202 is for higher floors.

  The water supply system 200 includes a sensor (also referred to as a discharge pressure sensor) S20 provided in the water supply pipe P21 on the discharge side of the first water supply apparatus 201. Here, the sensor S20 is directly connected to the first water supply device 201 via the signal line W1, measures the water pressure in the water supply pipe P21 on the discharge side of the first water supply device 201, and the obtained pressure. The measured value is output to the first water supply apparatus 201.

  Similarly, the water supply system 200 includes a sensor (also referred to as a discharge pressure sensor) S25 provided in the water supply pipe P22 on the discharge side of the second water supply apparatus 202. Here, the sensor S25 is directly connected to the second water supply device 202 via the signal line W2, and measures the water pressure in the water pipe P22 on the discharge side of the second water supply device 202, and the obtained pressure. The measured value is output to the second water supply device 202.

  The water supply system 200 includes sensors (also referred to as remote sensors) S21 to S24 that communicate with the first water supply apparatus 201, and water taps B21 to B23. Here, the water pipe P21 is branched into four parts, sensors S21 to S23 are provided on the three branches, respectively, and water taps B21 to B23 are provided on the ends of the branches. A sensor S24 is provided at the other branch of the water pipe P21, and the end of this branch is connected to the second water supply device 202.

  Each of the sensors S21 to S24 measures the water pressure in the water pipe P21 and transmits the obtained pressure measurement value to the first water supply apparatus 201 via the communication line L2.

  The water supply system 200 includes sensors (also referred to as remote sensors) S31 to S35 that communicate with the first water supply apparatus 201, and water taps B31 to B35. Here, the water pipe P22 is branched into four parts, sensors S33 to S35 are provided in the three branches, respectively, and water taps B31 to B35 are provided at the ends of the branches. The remaining one branch of the water pipe P22 is further branched into two, and a water tap B31 is provided at one end, a sensor S31 is provided in the water pipe P22 in the vicinity thereof, and the other branch is provided. A water faucet B32 is provided at the end, and a sensor S32 is provided in the water pipe P22 in the vicinity thereof.

  Each of the sensors S31 to S35 measures the water pressure in the water pipe P22 and transmits the obtained pressure measurement value to the first water supply device 201 via the communication line L2.

  Since the structure of the 1st water supply apparatus 201 is the same as the structure of the water supply apparatus 1 of 1st Embodiment in FIG.2 and 3, the detailed description is abbreviate | omitted.

  For example, when the processor of the first water supply apparatus 201 detects a decrease in the terminal pressure measured by the sensor S31, the processor of the first water supply apparatus 201 is controlled by a constant terminal control method based on the terminal pressure.

  On the other hand, when the terminal pressure cannot be acquired due to the failure of the sensor S31 or the disconnection of the communication line L2, or when the discharge pressure measured by the sensor (discharge pressure sensor) S20 on the first water supply device 201 side is reduced, it is detected. Using the discharge pressure, the operation control of the pump is performed with the constant estimated terminal pressure control.

  As described above, the first water supply device 201 is connected to the sensor S31 installed at the discharge side end of the second water supply device 202 by the communication line L2. When the pressure measurement value measured by the sensor S31 is lower than the target pressure, the processor of the first water supply apparatus 201 may operate using the terminal pressure constant control method. As a result, the first water supply device 201 for the lower floor can be operated with the terminal pressure constant control with the decrease in the terminal pressure detected by the sensor S31.

  On the other hand, when the pressure measurement value of the sensor (discharge pressure sensor) S20 provided in the water pipe P21 on the discharge side of the first water supply device falls below the set pressure, the processor of the first water supply device 201 detects the sensor (discharge). Pressure sensor) The estimated terminal pressure constant control may be performed using the pressure measurement value of S20.

  In addition, the processor of the 1st water supply apparatus 201 is not the sensor (discharge pressure sensor) S20, but when the pressure measurement value of any of the sensors S21 to S24 is lower than the set pressure, the pressure of any of the sensors S21 to S24. The estimated terminal pressure constant control may be performed using the measured value.

<Third Embodiment>
Next, a third embodiment will be described. FIG. 11 is a schematic configuration diagram of a water supply system according to the third embodiment. The water supply system 300 which concerns on 3rd Embodiment is a thing for high-rise buildings similarly to 2nd Embodiment, and compared with the water supply system 200 which concerns on 2nd Embodiment, sensor (suction pressure sensor) S41. Is newly provided in the city water inflow pipe P1, and the sensor S41 is connected to the first water supply device 201 through the signal line W3, and the sensor S24 is connected to the second through the signal line W3. The point which is connected to the water supply apparatus 202 is different.

  When the sensor S31 installed at the discharge-side end of the second water supply device 202 falls below the target pressure or when the sensor S24 falls below the first set pressure, the processor of the first water supply device 201 The terminal pressure constant control may be performed also when the operation is performed by the constant pressure control method and the pressure of the sensor S20 falls below the second set pressure.

<Fourth Embodiment>
Next, a fourth embodiment will be described. FIG. 12 is a schematic configuration diagram of a water supply system according to the fourth embodiment. The water supply system 400 which concerns on 4th Embodiment is a thing for high-rise buildings similarly to 3rd Embodiment, Compared with the water supply system 300 which concerns on 3rd Embodiment, sensors S21-S23, S311- S35 is different in that it communicates with each other via the communication line L4. Thereby, the processor 143 of the first water supply apparatus 201 communicates the pressure measurement value of a sensor (for example, the sensor S31) not directly connected to the first water supply apparatus 201 via another sensor (for example, the sensor S22). By performing this, it is possible to acquire a pressure measurement value of a sensor (for example, sensor S31) that is not directly connected to the first water supply apparatus 201.

  For example, the processor of the first water supply apparatus 201 communicates with the sensor S22 to acquire the pressure measurement value of the sensor S31, and when the pressure measurement value of the sensor S31 (that is, the end pressure) falls below the target pressure, or the second When the pressure measurement value of the sensor S25 installed on the discharge side of the water supply device 202 falls below the first set pressure, the operation is performed by the constant terminal pressure control method, and installed on the discharge side of the first water supply device 201. Even when the measured pressure value of the sensor S20 is lower than the first set pressure, the terminal pressure constant control may be performed.

  In the water supply systems 200, 300, and 400 for high-rise buildings, a plurality of remote sensors that communicate with the first water supply device 201 or the second water supply device 202 may be installed on the same network. In that case, the number of remote sensors in the first water supply device 201 and the unique ID of the sensor S31 which is the remote sensor installed at the very end on the discharge side pipeline on the second water supply device 202 side, the second And the processor 143 recognizes the pressure detected by each remote sensor as the first end pressure and the second end pressure.

  In the water supply system 200, 300, 400 for high-rise buildings, the second water supply device is connected to the same network as the remote sensor, and the detection result of the sensor (discharge pressure sensor) S25 detected by the second water supply device 202 is detected. And / or you may transmit the detection result of sensor (suction pressure sensor) S24 to the 1st water supply apparatus 201 by communication. Thereby, the processor of the 1st water supply apparatus 201 can acquire the detection result of sensor (discharge pressure sensor) S25 and / or the detection result of sensor (suction pressure sensor) S24.

  In the water supply systems 200, 300, and 400 for high-rise buildings, the processor of the first water supply device 201 transmits data to all remote sensors on the same network and delays until the response is returned. The remote pressure sensor is automatically discriminated from the remote sensor that detects the terminal pressure installed at the terminal on the second water supply device discharge side pipe line, and the remote sensor that has returned the latest response is counted automatically. An initialization function may be provided.

  In the water supply system 200, 300, 400 for a high-rise building, the processor of the first water supply device 201 operates the pump with the discharge side pipeline of the second water supply device cut off, and the pump of the pump to be operated The operating frequency is gradually increased from the lowest frequency to the highest frequency, and the pressure detected by the remote sensor rises above the required target pressure. The slowest remote sensor is connected to the discharge side pipe of the second water supply device 202. You may provide the terminal pressure sensor automatic discrimination function discriminate | determined automatically with the remote sensor which detects the terminal pressure installed in the terminal on the road.

  However, the processor of the first water supply apparatus 201 uses a terminal pressure sensor automatic determination function, and when there are a plurality of sensors determined that the pressure detected by the remote sensor is the slowest to rise above a required target pressure, Of the certain sensors, the terminal sensor that detects the terminal pressure may be the one with the slower response to the data transmitted from the processor of the first water supply apparatus 201.

  In the water supply system 200, 300, 400 for the above-mentioned high-rise building, the pressure acquired from the second sensor other than the pressure acquired from the first sensor recognized as the remote sensor installed at the end of the pipe When the lower state continues for longer than a predetermined time, or when it is detected more than a predetermined number of times, the processor of the first water supply device 201 detects the end sensor stored in the storage device. The second sensor that switches from the first sensor to the second sensor and automatically updates the discharge-side end pressure sensor of the second water supply device 202 installed at the end on the discharge-side pipe line of the second water supply device 202 Equipped with a terminal sensor automatic update function.

  In the water supply system 200, 300, 400 for high-rise buildings, when the processor of the first water supply device 201 detects a decrease in the suction pressure detected by the suction pressure sensor S24 of the second water supply device 202, the suction pressure A suction pressure constant control operation function for operating or stopping the pump so as to be constant may be provided.

  In each embodiment, the water supply device, the first water supply device, or the second water supply device used in the water supply systems 100 to 400 may communicate by any of the following methods. That is, the water supply device, the first water supply device, or the second water supply device is connected via RS-485 / RS-232 / RS-422, CAN using serial communication, LAN network directly connecting a remote sensor and a communication line. Ethernet (Long Term Evolution) or WiMAX (Worldwide Interoperability) equivalent to Ethernet communication or power line communication via power line, wireless LAN, 3rd generation mobile communication system (3G), 3.9 generation mobile communication system (3.9G) for Microwave Access), fourth generation mobile communication system (4G), Bluetooth (registered trademark), and LPWA (Low Power Wide Area).

<Remote sensor network configuration>
FIG. 13 is a schematic diagram illustrating an example of a star network configuration. In FIG. 13, a water supply apparatus 501 is connected to each of the sensors S51 to S56. In each embodiment, as shown in FIG. 13, the remote sensor used for the water supply systems 100 to 400 may be configured to directly communicate with the water supply device, the first water supply device, or the second water supply device in a star network form. Good.

  FIG. 14 is a schematic diagram illustrating an example of a ring network configuration. In FIG. 14, a water supply device 601 and sensors S61 to S68 are sequentially connected, and finally a sensor S68 is connected to the water supply device 601. In each embodiment, the remote sensor used for the water supply systems 100 to 400 may be configured to communicate with the water supply device, the first water supply device, or the second water supply device in a ring network form as shown in FIG. .

  In each embodiment, the remote sensor used for the water supply systems 100 to 400 may not directly communicate with the water supply device, the first water supply device, or the second water supply device. FIG. 15 is a schematic diagram showing an example of a tree-type network form. In FIG. 15, a water supply device 701 is connected to sensors S71 and S74, sensors S72 and S73 are connected to sensor S71, and sensor S75 is connected to sensor S74.

  FIG. 16 is a schematic diagram illustrating an example of a mesh network configuration. In FIG. 16, a water supply device 801 is connected to sensors S81 and S85, sensors S82, S83, S84 and S85 are connected to sensor S81, and sensors S83, S84 and S86 are connected to sensor S82 in addition to sensor S81. In addition to sensors S81 and S82, sensors S84 to S86 are connected to S83, sensors S85 and S86 are connected to sensor 84, and sensors S86 are connected to sensor 85 in addition to sensors S81, S83 and S84.

  The water supply systems 100 to 400 have a multi-hop function that communicates between remote sensors and transmits detection results to the water supply device, the first water supply device, or the second water supply device via other remote sensors, It can be constructed by the tree type network form shown in FIG. 15 or the mesh type network form shown in FIG.

  As described above, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, the constituent elements over different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1,601,701,801,901 Water supply apparatus 100,200,300,400,900 Water supply system 11 Pump 12 Motor 13 Inverter 14 Control apparatus 141 Memory | storage device 142 Timer 143 Processor 144 Communication circuit 20 Sensor 21 Pressure detector 22 Memory | storage device 23 processor 24 communication circuit 31 pressure detector 32 storage device 33 processor 34 communication circuit 45 temperature detector 201 first water supply device 202 second water supply device 911 pump 912 motor 913 inverter 914 control device B1 to B19, B21 to B23, B31-B35 Water tap L1, L2, L4 Communication line P1 City water inflow pipe P2, P21, P22 Water pipe S1-S19, S21-S23, S31-S35 Sensor (remote sensor)
S20, S25 Sensor (Discharge pressure sensor)
S24, S41 Sensor (Suction pressure sensor)
W1, W2, W3, W4 signal lines

Claims (16)

A communication circuit that is provided at different positions on the pipe of the water pipe communicating with the pump and communicates with each of a plurality of sensors that measure the pressure of water in the water pipe;
A processor that requests a pressure measurement value obtained by measurement for each of the plurality of sensors via the communication circuit, and controls to receive the pressure measurement value output from the sensor in response to the request. When,
It is a difference in pressure measurement values between a first sensor of the plurality of sensors and a second sensor different from the first sensor among the plurality of sensors, and the pipe line of the water pipe is A storage device for storing a difference between pressure measurement values measured in the closed state as a pressure correction value;
With
When the processor can receive a pressure measurement value from the first sensor, the processor controls the rotation speed of the pump so that the pressure measurement value measured by the first sensor matches a target pressure, and the first sensor If the pressure measurement value cannot be received from the sensor, the pressure of the pump is determined so that the pressure determined based on the pressure measured by the second sensor and the pressure correction value stored in the storage device matches the target pressure. A water supply system that controls the rotational speed. The water supply system according to claim 1, wherein the first sensor is a terminal sensor that is a sensor provided at a position farthest from the pump on a pipe line of the water pipe among the plurality of sensors. The water supply system according to claim 2, wherein the second sensor is located closer to the pump than the first sensor on a pipe line of the water pipe. The water supply system according to claim 2, wherein the second sensor is a sensor that is disposed on a discharge side of the pump and detects a pressure of water discharged from the pump. The pressure determined based on the pressure measured by the second sensor and the pressure correction value stored in the storage device is the pressure correction value stored in the storage device as the pressure measured by the second sensor. The water supply system according to any one of claims 1 to 4, wherein the pressure is a sum of pressures. The plurality of sensors store identification information different from each other,
The processor requests a response to each of the plurality of sensors via the communication circuit, receives a response output from the sensor in response to the request,
The processor uses each transmission delay time from when the response is requested until the response is received from each of the sensors, to among the plurality of sensors, at a position farthest from the pump on the pipe line. The water supply system according to any one of claims 1 to 5, wherein an end sensor that is a provided sensor is determined. The water supply system according to claim 6, wherein the processor determines the sensor having the longest transmission delay time among the plurality of sensors as the end sensor. The plurality of sensors store identification information different from each other,
The said processor determines the terminal sensor which is a sensor provided in the position furthest from the said pump on the pipe line of the said water pipe using each pressure measurement value of the said sensor. The water supply system according to item. 9. The processor according to claim 8, wherein, in the process of gradually increasing the operation frequency of the pump, the sensor that has the pressure measurement value that has exceeded the target pressure the latest among the plurality of sensors is determined as the end sensor. Water supply system. When there are two or more sensors that have exceeded the target pressure at the latest time, the processor determines the sensor having the lowest pressure measurement value as the end sensor among the two or more sensors that have exceeded the target pressure at the latest time. The water supply system according to claim 8. The processor requests a response to each of the plurality of sensors via the communication circuit, receives a response output from the sensor in response to the request,
When there are two or more sensors that have exceeded the target pressure at the latest and the pressure measurement values of the two or more sensors are the same, the processor has two or more sensors that have exceeded the target pressure at the latest. The water supply system according to claim 8, wherein among the sensors, the sensor having the longest transmission delay time from when the response is requested to when the response is received from each of the sensors is determined as the end sensor. The processor requests a response to each of the plurality of sensors via the communication circuit, receives a response output from the sensor in response to the request,
The processor has two or more sensors that have exceeded the target pressure at the latest, and the pressure measurement values of the two or more sensors are the same, and the response is requested from each of the sensors after requesting the response. The water supply according to claim 8, wherein when the transmission delay time until reception is the same, the terminal sensor is determined by comparing the unique identification information of two or more sensors that have exceeded the target pressure at the latest time. system. When the processor has detected that the pressure measurement value of the second sensor is lower than that of the first sensor for a longer time than the set time or more than the set number of times, the processor and the second sensor Update the pressure correction value stored in the storage device with the difference in the pressure measurement value from the third sensor included in the plurality of sensors,
If the processor can receive a pressure measurement value from the second sensor, the processor controls the rotation speed of the pump so that the pressure measurement value measured by the second sensor matches a target pressure, and the second sensor When the pressure measurement value cannot be received from the sensor, the pump is determined so that the pressure determined based on the pressure measured by the third sensor and the updated pressure correction value stored in the storage device matches the target pressure. The water supply system according to any one of claims 1 to 12, wherein the number of rotations is controlled. Each of the plurality of sensors has a pressure detector that measures the pressure of water in the water pipe, and a temperature detector that measures the temperature of the pressure detector,
When the temperature measurement value by the temperature detector included in the first sensor falls within a preset temperature, the processor causes the pressure measurement value measured by the first sensor to match the target pressure. When the temperature measurement value by the temperature detector included in the first sensor exceeds a preset temperature, the pressure measured by the second sensor and the The water supply system according to any one of claims 1 to 13, wherein the rotation speed of the pump is controlled so that a pressure determined based on a pressure correction value stored in a storage device matches the target pressure. The communication circuit communicates with the sensor by serial communication directly connecting the sensor to the sensor, Ethernet communication via a LAN network, power line communication via a power line, or wireless communication. The water supply system according to one item. A first sensor of a plurality of sensors provided at different positions on a pipe of a water pipe communicating with a pump and measuring the pressure of water in the water pipe, and a distance of the water pipe among the plurality of sensors Difference in pressure measurement value between the second sensor located closer to the pump than the first sensor and the pressure measurement value measured in a state where the pipe of the water pipe is closed A water supply device capable of referring to a storage device for storing
A communication circuit that communicates with each of the plurality of sensors;
A processor that requests a pressure measurement value obtained by measurement for each of the plurality of sensors via the communication circuit, and controls to receive the pressure measurement value output from the sensor in response to the request. When,
With
When the processor can receive a pressure measurement value from the first sensor, the processor controls the rotation speed of the pump so that the pressure measurement value measured by the first sensor matches a target pressure, and the first sensor If the pressure cannot be received from the sensor, the rotational speed of the pump is adjusted so that the pressure determined based on the pressure measured by the second sensor and the difference stored in the storage device matches the target pressure. Water supply to control.