JP2018191119A - Monitoring control system and on-site control panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitoring control system capable of sharply reducing man-hours and processes or the like in the case of installing an on-site control panel.SOLUTION: A monitoring control system comprises: first and second on-site control panels and a reception device. The first on-site control panel receives an instruction to start and stop driving relative to a load installed in a water treatment plant, and generates a radio signal on the basis of the received instruction, and transmits the radio signal. The second on-site control panel receives the radio signal transmitted from the first on-site control panel, and transmits the radio signal. The reception device receives the radio signal transmitted from the second on-site control panel, and extracts information related to the instruction from the received radio signal. The first and second on-site control panels respectively comprise a battery for supplying power.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a monitoring control system and a field operation panel.

  In a water treatment plant such as a water and sewage plant, a control panel referred to as an on-site operation panel for operating, for example, an electric motor, which is a load provided on the site, is provided. The field operation panel is, for example, a switch box having an input interface through which a field operator inputs a load operation or a stop, and a display circuit for displaying a load state.

  By the way, in order to operate the field operation panel, it is necessary to lay a control cable of about 10 to 30 cores and a power cable. When the laying environment is bad or the distance from the central control room to the site operation panel is long, the man-hours and processes for laying the control cable and the power cable are increased, and the cost is greatly increased. In such a case, the merit of providing the on-site operation panel apart from the central management room is diminished.

Japanese Patent Laid-Open No. 2006-96450

  Therefore, an object is to provide a monitoring control system capable of significantly reducing the man-hours and processes when installing the on-site operation panel, and an on-site operation panel used in this system.

  According to the embodiment, the monitoring control system includes first and second field operation panels and a receiving device. The first field operation panel receives an instruction to start or stop driving with respect to a load provided in the water treatment plant, generates a radio signal based on the received instruction, and transmits the radio signal. The second field operation panel receives a radio signal transmitted from the first field operation panel and transmits the received radio signal. The receiving device receives a radio signal transmitted from the second field operation panel, and extracts information related to the instruction from the radio signal. The first and second field operation panels include batteries that supply electric power.

FIG. 1 is a diagram illustrating a configuration of a monitoring control system according to the present embodiment. FIG. 2 is a diagram illustrating a wireless network formed by the field operation panel shown in FIG. FIG. 3 is a block diagram showing a functional configuration of the local operation panel shown in FIGS. 1 and 2. FIG. 4 is a diagram for explaining the operation of the on-site operation panel shown in FIG. FIG. 5 is a diagram for explaining the operation of the on-site operation panel shown in FIG. FIG. 6 is a diagram for explaining the operation of the on-site operation panel shown in FIG. FIG. 7 is a block diagram showing another functional configuration of the local operation panel shown in FIG.

  Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1 is a schematic diagram illustrating a configuration example of a monitoring control system according to the present embodiment. The monitoring control system shown in FIG. 1 represents a system used in a water treatment plant such as a water and sewage plant, for example.

  The monitoring control device 21, the data server 22, the controller panel 23, the auxiliary relay panel 24, the instrument panel 25, the power panel 26, the power source 27, and the receiving device 28 included in the monitoring control system shown in FIG. It is provided in the management room. The monitoring control device 21, the data server 22, and the controller board 23 are connected by, for example, a so-called communication cable that can transmit information in parallel. The controller panel 23, the auxiliary relay panel 24, the instrument panel 25, and the receiving device 28 are connected by, for example, a so-called control cable that serially transmits a control signal.

  Moreover, the site operation panels 10-1 to 10-n, the measurement device 31, and the electric motor 32 included in the monitoring control system shown in FIG. 1 are provided at the site, for example. In addition, in this embodiment, the site | site represents the facilities where water treatment is actually implemented, such as a sedimentation basin and a filtration basin, etc. which are provided in a water treatment plant, and its vicinity. The local operation panels 10-1 to 10-n form a multi-hop wireless network and communicate with each other. At least one of the local operation panels 10-1 to 10-n transmits a radio signal to the receiving device 28. The measuring device 31 is connected to the instrument panel 25 by a control cable, for example. When it is difficult to extend the control cable to the instrumentation panel 25, the measuring device 31 is connected to the on-site operation panel 10 installed in the vicinity by the control cable. The electric motor 32 is connected to the power source 27 via the power panel 26 by a power cable.

  The measuring device 31 measures the state of a facility provided in the water treatment plant. The measuring device 31 has various sensors that can detect the state of the facility. Various sensors include, for example, quantitative sensors and / or qualitative sensors. In the present embodiment, for example, at least one of the quantitative sensors may be used depending on the application from among a flow meter, a pressure gauge, a water level meter, and the like. The qualitative sensor may be at least one of turbidimeter, pH meter, residual chlorine meter, chromaticity meter and the like depending on the application. The measuring device 31 measures the state of the installed facility at a preset cycle. The measuring device 31 outputs measurement data obtained by the measurement to the instrumentation panel 25 or the field operation panel 10 via the control cable. In FIG. 1, only two measuring devices 31 are shown. However, in the water treatment plant, for example, measuring devices 31 are installed for each facility such as a sedimentation basin and a filtration basin. In addition, a plurality of measuring devices 31 may be installed for each facility. That is, three or more measuring devices 31 may be installed in the water treatment plant.

  The electric motor 32 is an example of a load provided at the site. Electric power is supplied to the electric motor 32 from a power source 27 via a power panel 26 provided in the central management room. The electric motor 32 is driven by electric power supplied from the power source 27. The electric motor 32 is connected to equipment such as a pump, a valve, or a blower provided in each facility of the water treatment plant. The electric motor 32 operates the connected device by power generated by driving. In FIG. 1, only one electric motor 32 is shown. However, in the water treatment plant, the electric motor 32 is installed for each device such as a pump, a valve, or a blower provided in the facility. Yes. That is, two or more electric motors 32 may be installed in the water treatment plant.

  The on-site operation panels 10-1 to 10-n are operation panels for the on-site operator to switch the start / stop of driving of the electric motor 32, the operation location, and the control mode. The local operation panels 10-1 to 10-n form a wireless network using multihop. FIG. 2 is a schematic diagram illustrating an example of a wireless network formed by the on-site operation panels 10-1 to 10-n illustrated in FIG. In the present embodiment, the connection destination for wireless communication is set in advance for each field operation panel 10. At least one of the local operation panels 10-1 to 10-n includes the receiving device 28 at the connection destination. The local operation panels 10-1 to 10-n transmit information instructed to start / stop driving of the electric motor 32, which is input from the local operator, to the receiving device 28, that is, the central management room via the wireless network.

  At least one of the on-site operation panels 10-1 to 10-n is connected to the measuring device 31. The on-site operation panel 10 connected to the measurement device 31 receives measurement data output from the measurement device 31. The local operation panel 10 transmits the received measurement data to the receiving device 28 via a wireless network.

  The monitoring control device 21 is a device that supervises and monitors the water treatment plant and controls various facilities provided in the water treatment plant as necessary. Specifically, for example, the monitoring control device 21 includes a display unit that displays the status of various facilities provided in the water treatment plant, and an input interface for an operator stationed in the central management room to input instructions. . The operator inputs an instruction corresponding to the state of the facility displayed on the display unit via the input interface. The monitoring control device 21 outputs a control signal based on the input instruction to the controller board 23. For example, the supervisory control device 21 may read past history information stored in the data server 22 and automatically generate a control signal suitable for the current state based on the read history information. .

  The controller board 23 functions as an interface between the first transmission system to which the monitoring control device 21 belongs and the second transmission system to which the auxiliary relay board 24 belongs. The controller board 23 has, for example, a control circuit 231 in order to realize the function as the interface. The control circuit 231 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and other programs and data storage areas for the CPU to execute processing. Note that the control circuit 231 may include an FPGA (Field Programmable Gate Array) that executes predetermined processing in accordance with control from the CPU. The control circuit 231 executes processing corresponding to the program by executing the processing program stored in the storage area or the like.

  For example, the control circuit 231 generates a control signal for controlling the auxiliary relay panel 24 based on the control signal output from the monitoring control device 21. The control circuit 231 outputs the generated control signal to the auxiliary relay panel 24. Further, the control circuit 231 outputs a signal representing the operation status of the electric motor 32 output from the auxiliary relay panel 24 to a communication cable to which the monitoring control device 21 and the data server 22 are connected. An operator who operates the monitoring control device 21 grasps the operation status of the electric motor 32 based on a signal indicating the operation status of the electric motor 32.

  Moreover, the control circuit 231 outputs the measurement data regarding the state of the facility provided in the water treatment plant output from the instrument panel 25 to the communication cable. An operator who operates the monitoring control device 21 grasps various parameters in a facility provided in the water treatment plant based on the measurement data.

  In addition, the control circuit 231 outputs a signal output from the receiving device 28 to the communication cable to which the auxiliary relay panel 24, the monitoring control device 21, and the data server 22 are connected.

  The receiving device 28 is provided in the vicinity of the controller board 23. The receiving device 28 may be provided inside the controller panel 23. The receiving device 28 receives a radio signal transmitted from at least one of the field operation panels 10-1 to 10-n and outputs information included in the received radio signal to the controller panel 23. The receiving device 28 includes, for example, a control circuit 281 and a communication circuit 282.

  The communication circuit 282 receives a wireless signal transmitted via a wireless network using multihop. The communication circuit 282 is realized by, for example, a wireless unit and an antenna unit. The antenna unit receives a radio signal transmitted from at least one of the on-site operation panels 10-1 to 10-n. The wireless unit converts the wireless signal received by the antenna unit according to a preset protocol. The communication circuit 282 outputs the converted signal to the control circuit 281. When there are a plurality of field operation panels 10 on which wireless connection is established, an antenna unit may be provided for each field operation panel 10. At this time, the directivity of each antenna unit is adjusted so as to face the corresponding on-site operation panel 10.

  The control circuit 281 includes, for example, a CPU and a storage area for programs and data for the CPU to execute processing such as a ROM and a RAM. Note that the control circuit 281 may include an FPGA or the like that executes predetermined processing in accordance with control from the CPU. The control circuit 281 executes processing corresponding to the program by executing the processing program stored in the storage area or the like.

  The control circuit 281 extracts necessary information from the signal output from the communication circuit 282. Specifically, for example, the control circuit 281 stores information on a rule for extracting necessary information from the signal converted by the communication circuit 282 in the storage area. In the present embodiment, the necessary information included in the signal converted by the communication circuit 282 includes, for example, first identification information for identifying the measuring device 31 provided in the water treatment plant, Second identification information for identifying the provided electric motor 32, information indicating measurement data acquired by the measuring device 31, information for instructing start / stop of driving of the electric motor 32, and the like are included.

  The information regarding the rule is, for example, information indicating a position where necessary information is arranged in the signal. Specifically, the information regarding the rules includes, for example, information indicating the position of the first identification information, information indicating the position of the second identification information, information indicating the position of the measurement data, and start / stop in the signal. The information indicating the position of the information indicating Further, when the signal is in a file format, the information related to the rule may be information indicating an area where necessary information is written in the file, for example. The information regarding the rules is not limited to the information described here. Further, the method by which the control circuit 281 extracts necessary information from the wireless signal is not limited to the above method, and any existing technique may be used.

  In addition, the control circuit 281 outputs the extracted information to the controller board 23. Specifically, the control circuit 281 determines the first identification information, the second identification information, the measurement data, and the start from the signal output from the communication circuit 282 based on the information regarding the rules stored in the storage area. / Extracts information indicating stop. The control circuit 281 adds the first identification information to the extracted measurement data, and outputs the measurement data with the first identification information added to the controller board 23. The controller board 23 stores, for example, a first table that associates the first identification information included in the radio signal with the measuring device 31 provided in the water treatment plant. The controller board 23 recognizes the acquisition source of the measurement data by collating the first identification information output from the receiving device 28 with the stored first table. The controller board 23 outputs the measurement data including the information of the acquisition source to a communication cable to which the monitoring control device 21 and the data server 22 are connected. An operator who operates the monitoring control device 21 grasps various parameters in a facility provided in the water treatment plant based on measurement data whose acquisition source is recognized.

  Further, the control circuit 281 outputs a signal obtained by adding the second identification information to the extracted information for instructing start / stop to the controller board 23. The controller panel 23 stores a second table that associates the second identification information included in the control signal with the power panel 26 that supplies power to the motor 32. The controller panel 23 specifies the power panel 26 to be controlled by collating the second identification information included in the signal output from the receiving device 28 with the second table stored in the storage area. . The controller panel 23 generates a control signal for controlling the specified power panel 26 based on information for instructing start / stop. The controller board 23 outputs the generated control signal to the power board 26.

  Further, the control circuit 281 measures the quality of wireless communication with the on-site operation panel 10 with which wireless connection is established. Any existing technique may be used as a method for measuring communication quality. For example, the control circuit 281 controls the communication circuit 282 and transmits a measurement signal for measuring communication quality to the local operation panel 10 where the wireless connection is established at a preset period. When the local operation panel 10 returns a response signal to the measurement signal, the control circuit 281 measures the communication quality of the wireless communication based on the received response signal. When the communication quality of wireless communication is deteriorated or when a response signal is not received, the control circuit 281 operates to establish a wireless connection with a different on-site operation panel 10.

  The auxiliary relay panel 24 includes a control circuit 241 that controls the power panel 26. The control circuit 241 is realized by a hardware configuration, for example.

  Based on the control signal output from the controller panel 23, the control circuit 241 generates a control signal for controlling the start / stop of the power board 26 power to be controlled. Control circuit 241 outputs the generated control signal to power panel 26.

  Further, the control circuit 241 controls the power panel 26 based also on the measurement data output from the instrument panel 25. For example, the control circuit 241 receives measurement data output from the instrumentation panel 25. When the value of the data acquired by the predetermined measurement device 31 exceeds the preset value among the received measurement data, the control circuit 241 applies to the power board 26 corresponding to the measurement device 31 that acquired the data. A control signal for controlling start / stop of power supply is generated. Control circuit 241 outputs the generated control signal to power panel 26.

  The instrumentation panel 25 includes a control circuit 251 that converts measurement data acquired by the measurement device 31 into data necessary for plant control. The control circuit 251 outputs the converted data to the controller board 23 and the auxiliary relay board 24.

  The power panel 26 includes a power circuit 261 for switching on / off of the power supply 27 to the electric motor 32. The power circuit 261 includes, for example, a breaker and a magnet contactor. The power circuit 261 switches the power supply 27 on or off in accordance with a control signal output from the auxiliary relay panel 24.

  FIG. 3 is a block diagram illustrating an example of a functional configuration of the on-site operation panels 10-1 to 10-n illustrated in FIG. 1 and FIG. In FIG. 3, among the on-site operation panels 10-1 to 10-n shown in FIG. 1 and FIG. 2, the on-site operation panel connected to the measuring device 31 is referred to as the on-site operation panel 10. 3 includes a control circuit 11, an operation circuit 12, an input interface 13, a transmission device 14, a communication circuit 15, a display circuit 16, and a battery 17.

  The control circuit 11 functions as the center of the local operation panel 10. The control circuit 11 includes, for example, a CPU and a storage area such as a ROM and a RAM. Note that the control circuit 11 may include an FPGA or the like that executes predetermined processing in accordance with control from the CPU. The control circuit 11 executes processing corresponding to the program by executing the processing program stored in the storage area or the like.

  The operation circuit 12 is a circuit for an on-site operator to instruct start / stop of driving to an electric motor 32 provided on the site. The operation circuit 12 is realized by a switch, for example. The operation circuit 12 converts an instruction input from the field operator into an electrical signal and outputs the electrical signal to the control circuit 11. The control circuit 11 generates an instruction signal for instructing start / stop of driving of the electric motor 32 based on the electric signal input from the operation circuit 12, and outputs the generated instruction signal to the transmission device 14.

  The input interface 13 is a circuit that receives data output from a connected device. The input interface 13 receives, for example, measurement data output from the connected measurement device 31. The input interface 13 converts the measurement data output from the measurement device 31 according to the data format in the apparatus, and outputs the converted measurement data to the control circuit 11. The control circuit 11 outputs measurement data input from the input interface 13 to the transmission device 14 and the display circuit 16.

  The transmission device 14 generates a transmission signal based on the instruction signal output from the control circuit 11 and the measurement data, and outputs the generated transmission signal to the communication circuit 15. The transmission device 14 includes, for example, a control unit 141, input / output units 142-1 to 142-3, and a power supply processing unit 143 in order to output a transmission signal to the communication circuit 15.

  The control unit 141 includes, for example, a CPU and storage areas such as a ROM and a RAM. The control unit 141 implements the functions of the transmission processing unit 1411 and the path control unit 1412 by executing a processing program stored in a storage area or the like. Note that the control unit 141 may include an FPGA or the like that executes predetermined processing in accordance with control from the CPU.

  The transmission processing unit 1411 generates a transmission signal based on the instruction signal output from the control circuit 11 and the measurement data. Specifically, for example, the transmission processing unit 1411 sets a signal having a preset capacity. The transmission processing unit 1411 relates to the instruction signal from the first position to the second position in the signal having the capacity set in advance as the first area for writing common information from the head to the first position. A second area for writing information is used, and a second area from the second position to the end is used as a third area for writing information on measurement data. In the present embodiment, the instruction signal is, for example, a binary signal for setting on or off. On the other hand, the measurement data is data having a plurality of discrete values. That is, the measurement data is data having a larger capacity than the instruction signal. Therefore, the third region is wider than the second region.

  The transmission processing unit 1411 writes, for example, first identification information for identifying the measuring device 31 and second identification information for identifying the electric motor 32 as common information in the first area. Note that the first identification information written in the first area is not limited to information for identifying the measuring device 31. Further, the second identification information written in the first area is not limited to information for identifying the electric motor 32. That is, the first and second identification information is not limited to the above as long as the controller board 23 can transmit appropriate information to the monitoring control device 21 and can control the auxiliary relay board 24. For example, the first and second identification information may be identification information for identifying the on-site operation panel 10. However, when the identification information for identifying the on-site operation panel 10 is set as the first and second identification information, the identification information on the on-site operation panel 10 and the measuring device 31 provided in the water treatment plant in the first table. In the second table, it is necessary to associate the identification information of the on-site operation panel 10 with the power panel 26 that supplies power to the electric motor 32.

  The transmission processing unit 1411 writes information related to the instruction signal, for example, “1” indicating the start of driving of the motor 32 or “0” indicating the stop of driving of the motor 32 in the second area. In addition, the transmission processing unit 1411 writes information related to measurement data in the third area. As a result, a transmission signal is generated. The transmission processing unit 1411 outputs the generated transmission signal to the input / output unit 142 corresponding to the local operation panel 10 in which the wireless network is formed.

  Note that the transmission signal generated by the transmission processing unit 1411 is not limited to the above. The transmission processing unit 1411 does not necessarily include the instruction signal and the measurement data in one data structure. The transmission processing unit 1411 may include the instruction signal and the measurement data in individual data structures. For example, the transmission processing unit 1411 stores the first identification information and the information related to the measurement data in one data structure and sets it as the first transmission signal. Also, the transmission processing unit 1411 stores the second identification information and the information related to the instruction signal in one data structure, and sets it as the second transmission signal.

  Further, the transmission processing unit 1411 may generate a transmission signal in a file format. The transmission processing unit 1411 sets a transmission file having a predetermined capacity, and sets first to third areas in the file. The transmission processing unit 1411 writes common information in the first area in the transmission file, writes information related to the instruction signal in the second area, and writes information related to the measurement data in the third area.

  In addition, when a transmission signal is transmitted from another field operation panel 10, the transmission processing unit 1411 corresponds to the field operation panel 10 in which a wireless network is formed with the transmitted transmission signal as it is. Output to the input / output unit 142. When transmission signals transmitted from the plurality of field operation panels 10 are continuously received at short intervals, the transmission processing unit 1411 outputs the received transmission signals to the input / output unit 142 according to the received order.

  The route control unit 1412 forms a wireless network with other field operation panels 10. Specifically, the control unit 141 stores in advance identification information of a plurality of field operation panels 10 that are candidates for wireless communication connection partners in the storage area. The local operation panel 10 that may establish a wireless connection with the receiving device 28 stores the identification information of the receiving device 28 in the storage area in advance. The path control unit 1412 determines at least one site operation panel 10 among the plurality of site operation panels 10 that are candidates for wireless communication connection partners as the signal transmission destination site operation panel 10. The route control unit 1412 establishes a wireless connection with the on-site operation panel 10 determined as the signal transmission destination. In addition, the path control unit 1412 determines at least one site operating panel 10 among the plurality of site operating panels 10 that are candidates for wireless communication connection partners as the site operating panel 10 that is a signal transmission source. The route control unit 1412 establishes a wireless connection with the on-site operation panel 10 determined as the signal transmission source. Note that any existing technique may be used as a method of establishing a wireless connection.

  The route control unit 1412 measures the quality of wireless communication with the local operation panel 10 for which wireless connection is established. For example, the path control unit 1412 controls the communication circuit 15 and transmits a measurement signal for measuring communication quality to the on-site operation panel 10 in which wireless connection is established at a preset period. When the local operation panel 10 returns a response signal to the measurement signal, the path control unit 1412 measures the communication quality of the wireless communication based on the received response signal. When the communication quality of wireless communication is deteriorated or when a response signal is not received, the path control unit 1412 operates to establish a wireless connection with another candidate stored in the storage area.

  The input / output units 142-1 to 142-3 are connected to the communication circuit 15, respectively. The input / output units 142-1 to 142-3 are configured as an interface between the control unit 141 and the communication circuit 15. The input / output units 142-1 to 142-3 output the transmission signal output from the control unit 141 to the communication circuit 15. Further, the input / output units 142-1 to 142-3 output the transmission signal output from the communication circuit 15 to the control unit 141.

  The power processing unit 143 is connected to the battery 17. The power processing unit 143 supplies the power supplied from the battery 17 to the control unit 141.

  The communication circuit 15 forms a wireless network using multi-hop together with other field operation panels 10. The communication circuit 15 is realized by, for example, the radio units 151-1 to 151-3 and the antenna units 152-1 to 152-3.

  The radio units 151-1 to 151-3 are connected to the input / output units 142-1 to 142-3, respectively. The wireless unit 151-1 converts the transmission signal output from the input / output unit 142-1 into a wireless signal according to a preset protocol. Radio section 151-1 outputs the converted radio signal to antenna section 152-1. The radio unit 151-1 converts the radio signal received by the antenna unit 152-1 into a transmission signal according to a preset protocol. Radio section 151-1 outputs the converted signal to input / output section 142-1. The operations of the wireless units 151-2 and 151-3 are the same as the operations of the wireless unit 151-1.

  The antenna units 152-1 to 152-3 are set so as to have directivity to the on-site operation panel 10 where wireless connection is established. The antenna units 152-1 to 152-3 are connected to the radio units 151-1 to 151-3, respectively. The antenna unit 152-1 transmits the radio signal converted by the radio unit 151-1 in the set direction. Further, the antenna unit 152-1 receives a radio signal that has arrived from the set direction, and outputs the received radio signal to the radio unit 151-1. The operations of the antenna units 152-2 and 152-3 are the same as the operation of the antenna unit 152-1.

  The display circuit 16 is realized by, for example, a liquid crystal display, and displays measurement data output from the measurement device 31 to an on-site operator.

  The battery 17 supplies power to the control circuit 11, the transmission device 14, the communication circuit 15, and the display circuit 16.

  Next, an example of the operation of the on-site operation panel 10 in the monitoring control system configured as described above will be described. 4 to 6 are diagrams for explaining the operation of the on-site operation panel 10 shown in FIG. According to FIG. 4, on-site operation panels 10-1 to 10-6 are installed in the water treatment plant. Moreover, the measuring device 31 is connected to the field operation panels 10-3 and 10-6.

  The field operation panel 10-1 shown in FIG. 4 identifies, for example, the field operation panels 10-2 and 10-3 that are candidates for wireless communication connection partners in the storage area of the control unit 141 provided in the transmission device 14. Information is stored in advance. Further, for example, the antenna unit 152-1 of the field operation panel 10-1 is set to have directivity to the field operation panel 10-2, and the antenna unit 152-2 is connected to the field operation panel 10-3. It is set to have directivity. The control unit 141 provided in the transmission device 14 of the local operation panel 10-1 determines, for example, the local operation panel 10-3 among the local operation panels 10-2 and 10-3 as a signal transmission destination. The control unit 141 transmits a confirmation signal for establishing a wireless connection from the antenna unit 152-2 to the determined on-site operation panel 10-3. When a response signal to the confirmation signal is returned from the local operation panel 10-3, the control unit 141 establishes a wireless connection with the local operation panel 10-3.

  In addition, the on-site operation panel 10-2 illustrated in FIG. 4 includes, for example, on-site operation panels 10-1 and 10-3 that are candidates for wireless communication connection partners in the storage area of the control unit 141 provided in the transmission device 14. , 10-4 are stored in advance. Further, for example, the antenna unit 152-1 of the field operation panel 10-2 is set to have directivity to the field operation panel 10-1, and the antenna unit 152-2 is connected to the field operation panel 10-3. The antenna unit 152-3 is set to have directivity to the on-site operation panel 10-4. The control unit 141 provided in the transmission device 14 of the local operation panel 10-2 determines the local operation panel 10-3 as the signal transmission destination among the local operation panels 10-1, 10-3, and 10-4. The control unit 141 transmits a confirmation signal for establishing a wireless connection from the antenna unit 152-2 to the determined on-site operation panel 10-3. When a response signal to the confirmation signal is returned from the local operation panel 10-3, the control unit 141 establishes a wireless connection with the local operation panel 10-3.

  In addition, the on-site operation panel 10-3 illustrated in FIG. 4 includes, for example, on-site operation panels 10-1 and 10-2 that are candidates for wireless communication connection partners in the storage area of the control unit 141 provided in the transmission device 14. , 10-4 are stored in advance. Further, for example, the antenna unit 152-1 of the field operation panel 10-3 is set to have directivity to the field operation panel 10-1, and the antenna unit 152-2 is connected to the field operation panel 10-2. The antenna unit 152-3 is set to have directivity to the on-site operation panel 10-4. The control unit 141 provided in the transmission device 14 of the on-site operation panel 10-3 uses the on-site operation panels 10-1 and 10-2 among the on-site operation panels 10-1, 10-2, and 10-4. Determine as. Control unit 141 determines on-site operation panel 10-4 among on-site operation panels 10-1, 10-2, and 10-4 as a signal transmission destination. The control unit 141 transmits a confirmation signal for establishing a wireless connection from the antenna unit 152-3 to the determined on-site operation panel 10-4. When a response signal to the confirmation signal is returned from the local operation panel 10-4, the control unit 141 establishes a wireless connection with the local operation panel 10-4.

  In addition, the on-site operation panel 10-4 illustrated in FIG. 4 includes, for example, on-site operation panels 10-2 and 10-3 that are candidates for wireless communication connection partners in the storage area of the control unit 141 provided in the transmission device 14. , 10-5 and 10-6 are stored in advance. Further, for example, the antenna unit 152-1 of the field operation panel 10-4 is set to have directivity to the field operation panel 10-2, and the antenna unit 152-2 is connected to the field operation panel 10-3. The antenna unit 152-3 is set to have directivity to the on-site operation panels 10-5 and 10-6. As shown in FIG. 5, the control unit 141 provided in the transmission device 14 of the on-site operation panel 10-4 is the on-site operation panel among the on-site operation panels 10-1 to 10-3, 10-5, and 10-6. 10-3 is determined as a signal transmission source. The control unit 141 determines the on-site operation panel 10-6 as the signal transmission destination among the on-site operation panels 10-1 to 10-3, 10-5, and 10-6. The control unit 141 transmits a confirmation signal for establishing a wireless connection from the antenna unit 152-3 to the determined on-site operation panel 10-6. When a response signal to the confirmation signal is returned from the local operation panel 10-6, the control unit 141 establishes a wireless connection with the local operation panel 10-6. Note that the control unit 141 gives priority to the on-site operation panel that transmits the confirmation signals to the on-site operation panels 10-5 and 10-6 in a broadcast manner or sequentially, and has a large response signal in response to the confirmation signal. May be determined as the transmission destination.

  In addition, the on-site operation panel 10-5 illustrated in FIG. 4 includes, for example, on-site operation panels 10-4 and 10-6 that are candidates for wireless communication connection partners in the storage area of the control unit 141 provided in the transmission device 14. , And identification information of the receiving device 28 is stored in advance. Further, for example, the antenna unit 152-1 of the field operation panel 10-5 is set to have directivity to the field operation panel 10-4, and the antenna unit 152-2 is connected to the field operation panel 10-6. The antenna unit 152-3 is set to have directivity to the receiving device 28. As shown in FIG. 5, the control unit 141 provided in the transmission device 14 of the local operation panel 10-5 includes the local operation panel 10-6 among the local operation panels 10-4 and 10-6 and the reception device 28. Is determined as a signal transmission destination. The control unit 141 transmits a confirmation signal for establishing a wireless connection from the antenna unit 152-2 to the determined on-site operation panel 10-6. When a response signal to the confirmation signal is returned from the local operation panel 10-6, the control unit 141 establishes a wireless connection with the local operation panel 10-6.

  In addition, the on-site operation panel 10-6 illustrated in FIG. 4 includes, for example, on-site operation panels 10-4 and 10-5 that are candidates for wireless communication connection partners in the storage area of the control unit 141 provided in the transmission device 14. , And identification information of the receiving device 28 is stored in advance. Further, for example, the antenna unit 152-1 of the field operation panel 10-6 is set to have directivity to the field operation panel 10-4, and the antenna unit 152-2 is connected to the field operation panel 10-5. The antenna unit 152-3 is set to have directivity to the receiving device 28. As shown in FIG. 5, the control unit 141 provided in the transmission device 14 of the local operation panel 10-6 includes the local operation panel 10-4 among the local operation panels 10-4 and 10-5 and the reception device 28. , 10-5 are determined as signal transmission sources. In addition, the control unit 141 determines the receiving device 28 among the on-site operation panels 10-4 and 10-5 and the receiving device 28 as a signal transmission destination. The control unit 141 transmits a confirmation signal for establishing a wireless connection to the determined receiving device 28 from the antenna unit 152-3. When a response signal to the confirmation signal is returned from the receiving device 28, the control unit 141 establishes a wireless connection with the receiving device 28.

  Next, an example of an operation when an instruction from the field operator is transmitted to the receiving device 28 by the field operation panels 10-1 to 10-6 will be described.

  For example, it is assumed that the site operator inputs a drive start instruction from the operation circuit 12 provided in the site operation panel 10-1 in a state where a wireless network is formed as shown in FIG. The control unit 141 provided in the transmission device 14 of the local operation panel 10-1 stores the second identification information for identifying the electric motor 32 driven by the local operation panel 10-1 in the first area, and indicates A transmission signal in which information related to the signal is stored in the second area is generated. The transmission device 14 outputs the generated transmission signal to the communication circuit 15 via the input / output unit 142-2. The wireless unit 151-2 of the communication circuit 15 converts the transmission signal output from the input / output unit 142-2 into a wireless signal. The antenna unit 152-2 transmits the radio signal converted by the radio unit 151-2 to the on-site operation panel 10-3 where the wireless connection is established.

  The communication circuit 15 of the local operation panel 10-3 receives the radio signal transmitted from the local operation panel 10-1 by the antenna unit 152-1. The wireless unit 151-1 of the communication circuit 15 converts the wireless signal received by the antenna unit 152-1 into a transmission signal. The transmission device 14 of the local operation panel 10-3 receives the transmission signal converted by the wireless unit 151-1 from the input / output unit 142-1. The transmission device 14 outputs the received transmission signal from the input / output unit 142-3 to the communication circuit 15. The wireless unit 151-3 of the communication circuit 15 converts the transmission signal output from the input / output unit 142-3 into a wireless signal. The antenna unit 152-3 transmits the radio signal converted by the radio unit 151-3 to the local operation panel 10-4 in which the wireless connection is established.

  When the local operation panel 10-4 receives the radio signal transmitted from the local operation panel 10-3 by the antenna unit 152-2, the received radio signal is processed by the antenna unit 152-2 in the same process as the on-site operation panel 10-3. -3 to the local operation panel 10-6. Further, when the local operation panel 10-6 receives the radio signal transmitted from the local operation panel 10-4 by the antenna unit 152-1, the on-site operation panel 10-6 transmits the received radio signal to the antenna through the same processing as the on-site operation panel 10-3. The data is transferred from the unit 152-3 to the receiving device 28.

  Further, for example, in a state where a wireless network is formed as shown in FIG. 5, the input interface 13 provided in the field operation panel 10-3 has received measurement data output from the connected measuring device 31. And The control unit 141 provided in the transmission device 14 of the local operation panel 10-3 stores first identification information for identifying the measuring device 31 connected to the local operation panel 10-3 in the first area, and A transmission signal in which information related to measurement data is stored in the third area is generated. The transmission device 14 outputs the generated transmission signal to the communication circuit 15 via the input / output unit 142-3. The wireless unit 151-3 of the communication circuit 15 converts the transmission signal output from the input / output unit 142-3 into a wireless signal. The antenna unit 152-3 transmits the radio signal converted by the radio unit 151-3 to the local operation panel 10-4 in which the wireless connection is established.

  The local operation panels 10-4 and 10-6 transmit the radio signal transmitted from the local operation panel 10-3 to the receiving device 28 by the multi-hop transmission process similar to the above.

  Next, the operation when the local operation panel 10-1 switches the connection destination of wireless communication will be described.

  The control unit 141 provided in the transmission device 14 of the local operation panel 10-1 controls the communication circuit 15 and establishes a wireless connection with a measurement signal for measuring communication quality at a preset cycle. It transmits to the local operation panel 10-3. When a response signal is returned from field operation panel 10-3, control unit 141 measures the communication quality of wireless communication based on the returned response signal. When the communication quality of the wireless communication is lower than the preset quality, or when no response signal is returned, the control unit 141 disconnects the connection with the local operation panel 10-3.

  When the connection with the local operation panel 10-3 is disconnected, the control unit 141 transmits a confirmation signal for establishing a wireless connection to the local operation panel 10-2 that is another candidate stored in the storage area. Transmit from unit 152-1. When a response signal to the confirmation signal is returned from the local operation panel 10-2, the control unit 141 establishes a wireless connection with the local operation panel 10-2. FIG. 6 is a schematic diagram illustrating a wireless network after the local operation panel 10-1 switches the wireless communication connection destination.

  As described above, the monitoring control system according to the present embodiment includes the field operation panels 10-1 to 10-n. The local operation panels 10-1 to 10-n include a transmission device 14, a communication circuit 15, and a battery 17. The local operation panels 10-1 to 10-n form a multi-hop wireless network by the transmission device 14 and the communication circuit 15. Of the on-site operation panels 10-1 to 10-n, the on-site operation panel to which an instruction from the on-site operator is input outputs the input instruction signal to the on-site operation panel in which wireless connection is established. The instruction signal is transmitted between the field operation panels where the wireless connection is established, and finally transmitted to the receiving device 28. As a result, the on-site operation panels 10-1 to 10-n can be operated even if the on-site operation panels 10-1 to 10-n and the central control room are not connected by the control cable (and the power cable). It is possible to transmit the instruction input from the central management room.

  Therefore, according to the monitoring control system and the on-site operation panel 10 according to the present embodiment, the man-hours and processes for installing the on-site operation panel 10 are greatly reduced, and the cost for installing the on-site operation panel 10 is greatly increased. Can be reduced.

  When the cable laid between the local operation panel 10 and the central control room is long distance, malfunction of the load due to electrostatic induction failure, damage of the load due to lightning surge induced by the cable, and control cable There is a risk of damage such as noise interference propagating through the cable. According to the monitoring control system and the field operation panel 10 according to the present embodiment, since it is not necessary to lay a cable between the field operation panel 10 and the central management room, electrostatic induction failure, lightning surge failure, and It is possible to eliminate the possibility of noise interference.

  Moreover, in the said embodiment, the control part 141 provided in the transmission apparatus 14 of the site control panel 10 stores the information regarding an instruction signal in the preset area | region of a transmission signal. Then, the local operation panel 10 converts the transmission signal received as a radio signal into a radio signal without changing the contents, and transmits the converted radio signal to the local operation panel 10 where the wireless connection is established. I have to. Thereby, even when the instruction signal is transmitted by multi-hop, the local operation panel 10 can quickly transmit the instruction signal to the receiving device 28. Even if the format of the instruction transmitted from the local operation panel 10 is different for each local operation panel 10, the instruction transmitted from the local operation panel 10 is transmitted to the receiving device 28 without confusion. Become.

  Moreover, in the said embodiment, the control part 141 provided in the transmission apparatus 14 of the local operation panel 10 sets the information regarding the measurement data acquired with the measuring device 31 in advance of the transmission signal different from the information regarding the instruction signal. Stored in the specified area. Then, the local operation panel 10 converts the transmission signal received as a radio signal into a radio signal without changing the contents, and transmits the converted radio signal to the local operation panel 10 where the wireless connection is established. I have to. Thereby, even if it is a case where an instruction signal and measurement data are transmitted by multihop, field operation panel 10 can promptly transmit an instruction signal and measurement data to receiving device 28. Further, even when the format of the measurement data acquired by the measurement device 31 is different for each measurement device 31, the measurement data transmitted from the on-site operation panel 10 is transmitted to the receiving device 28 without confusion. Become.

  In the above embodiment, the directivity direction of the antenna unit 152 provided in the communication circuit 15 of the on-site operation panel 10 is directed to the on-site operation panel 10 or the receiving device 28 in which wireless connection is established. As a result, it is possible to accurately receive a radio signal transmitted from the local operation panel 10 in which the wireless connection is established. In addition, it is possible to accurately transmit a radio signal to the local operation panel 10 or the receiving device 28 where the wireless connection is established.

  In the above-described embodiment, the transmission device 14 of the local operation panel 10 is connected to the local operation panel where the wireless connection is established. When is disconnected, a wireless connection is established with another field operation panel. Thereby, even if a failure occurs in wireless communication between the on-site operation panels, an instruction input from the on-site operator can be transmitted to the receiving device 28.

  In the above embodiment, the case where the wireless connection is always established between the on-site operation panels 10-1 to 10-n has been described as an example. However, it is not limited to this. The on-site operation panel 10 may sequentially establish a wireless connection between the on-site operation panels 10 when transmitting a radio signal. For example, when a transmission signal is generated by the transmission processing unit 1411, the path control unit 1412 of the transmission device 14 controls a wireless unit that is not performing wireless communication among the wireless units 151-1 to 151-3. Confirmation signals are transmitted by broadcast to a plurality of on-site operation panels 10 that are candidates for wireless communication connection partners. In addition, you may make it transmit a confirmation signal to each field operation panel sequentially. When a response signal to the confirmation signal is returned from another field operation panel, the path control unit 1412 establishes a wireless connection with the field operation panel that has transmitted the response signal having the highest strength. The transmission processing unit 1411 controls the wireless unit with which the wireless connection has been established, and transmits the generated transmission signal. Thereby, it becomes possible to suppress the consumption of the battery 17 as compared with the case where the wireless connection is always established.

  Moreover, in the said embodiment, the case where the field operation panel 10-1 to 10-n transmits the instruction | indication and measurement data which were input from the field operator to the receiver 28 via the wireless network using a multihop is an example. Explained. However, information transmitted through a wireless network using multihop is not limited to these. For example, a contact signal output from a predetermined hardware circuit connected to the local operation panel 10 may be transmitted to the receiving device 28. At this time, the input interface 13 converts the contact signal output from the connected hardware circuit according to the data format in the apparatus, and outputs the converted contact signal to the control circuit 11. The control circuit 11 outputs a contact signal input from the input interface 13 to the transmission device 14 and the display circuit 16. The transmission device 14 generates a transmission signal based on the received contact signal.

  Moreover, in the said embodiment, the communication circuit 15 of the site control panel 10 demonstrated as an example the case provided with the radio | wireless part 151-1 to 151-3 and the antenna part 152-1 to 152-3. However, the configuration of the communication circuit 15 is not limited to this. The number of radio units and antenna units provided in the communication circuit 15 may be two or four or more, respectively. In addition, as shown in FIG. 7, each of the wireless unit and the antenna unit provided in the communication circuit 15 may be one. When there is one radio unit and one antenna unit provided in the communication circuit 15, the antenna unit may have directivity in all directions.

  Here, in the field operation panel 10 shown in FIG. 7, an operation when the communication circuit 15 of the signal transmission destination field operation panel 10 is used for communication with other field operation panels 10 will be described.

  For example, when a transmission signal is generated by the transmission processing unit 1411, the route control unit 1412 of the transmission device 14 broadcasts confirmation signals to a plurality of operation panels 10 that are candidates for wireless communication connection partners, or sequentially. Send. The route control unit 1412 establishes a wireless connection with the on-site operation panel 10 that has returned the response signal having the highest strength with respect to the confirmation signal. Thereby, the local operation panel 10 can establish a wireless connection with another local operation panel 10 in which the communication circuit 15 is not used. On the other hand, when there is no on-site operation panel 10 that returns a response signal to the confirmation signal, the path control unit 1412 transmits the confirmation signal at a predetermined cycle until a response signal is returned from any of the on-site operation panels 10. The wireless unit 151 is controlled to continue. As a result, the on-site operation panel 10 can establish the wireless connection after waiting for the communication circuit 15 of the on-site operation panel 10 to which the wireless connection is established to be opened.

  Although the embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. This embodiment and its modifications are included in the scope of the present invention and the gist thereof, and are also included in the invention described in the claims and the equivalent scope thereof.

  DESCRIPTION OF SYMBOLS 10,10-1-10-6,10-n ... Local operation panel, 11 ... Control circuit, 12 ... Operation circuit, 13 ... Input interface, 14 ... Transmission apparatus, 141 ... Control part, 1411 ... Transmission processing part, 1412 ... path control unit, 142, 142-1 to 142-3 ... input / output unit, 143 ... power supply processing unit, 15 ... communication circuit, 151, 151-1 to 151-3 ... radio unit, 152, 152-1 to 152 -3 ... Antenna part, 16 ... Display circuit, 17 ... Battery, 21 ... Monitoring and control device, 22 ... Data server, 23 ... Controller panel, 231 ... Control circuit, 24 ... Auxiliary relay panel, 241 ... Control circuit, 25 ... Total Board, 251 ... control circuit, 26 ... power board, 261 ... power circuit, 27 ... power supply, 28 ... receiving device, 281 ... control circuit, 282 ... communication circuit, 31 ... measuring instrument, 32 ... electric motor.

Claims (13)

A first on-site operation panel that receives an instruction to start or stop driving for a load provided in the water treatment plant, generates a radio signal based on the received instruction, and transmits the radio signal;
Receiving a radio signal transmitted from the first field operation panel, and transmitting the radio signal, a second field operation panel;
A receiving device that receives a radio signal transmitted from the second field operation panel and extracts information related to the instruction from the received radio signal;
The first and second field operation panels are monitoring and control systems including a battery for supplying power.   The monitoring control system according to claim 1, wherein the first field operation panel generates a transmission signal including information related to the instruction in a preset area, and generates the radio signal by converting the transmission signal.   2. The monitoring control system according to claim 1, wherein the first field operation panel generates the radio signal based on measurement data acquired by a measurement device that measures a state of the water treatment plant and the instruction.   The first field operation panel generates a transmission signal including information related to the instruction in a first area set in advance and including information related to the measurement data in a second area set in advance. The supervisory control system according to claim 3, wherein the radio signal is generated by converting the signal. The first field operation panel has directivity in the direction in which the second field operation panel is provided,
The second field operation panel has directivity in the direction in which the first field operation panel and the receiving device are provided,
The monitoring control system according to claim 1, wherein the receiving device has directivity in a direction in which the second field operation panel is provided.   The monitoring control system according to any one of claims 1 to 5, wherein the first on-site operation panel, the second on-site operation panel, and the receiving device switch a connection destination of wireless communication based on communication quality. A transmission device that establishes a wireless connection with a preset on-site operation panel and generates a transmission signal based on a start or stop instruction for driving a load provided in the water treatment plant;
A communication circuit that converts the transmission signal into a radio signal, and transmits the converted radio signal to a local operation panel that establishes the wireless connection;
On-site operation panel comprising a battery for supplying power. The transmission device establishes a wireless connection with a plurality of preset field operation panels,
The communication circuit receives a radio signal transmitted from one of the field operation panels that have established the wireless connection, and the received wireless signal is directed toward the other of the field operation panels that have established the wireless connection. The on-site operation panel according to claim 7, which transmits a signal.   The field operation panel according to claim 7 or 8, wherein the transmission device generates a transmission signal including information related to the start or stop instruction in a preset area. Further comprising an input interface for receiving measurement data acquired by a measuring device for measuring the state of the water treatment plant;
The field operation panel according to claim 7, wherein the transmission device generates the transmission signal based on the measurement data and the instruction.   The field operation according to claim 10, wherein the transmission device generates a transmission signal that includes information related to the instruction in a first area set in advance and includes information related to the measurement data in a second area set in advance. Board.   The field operation panel according to claim 7, wherein the communication circuit has directivity in a direction in which the field operation panel is provided.   The field operation panel according to any one of claims 7 to 12, wherein the transmission device switches a connection destination of wireless communication based on communication quality with a field operation panel with which wireless connection is established.