Power line communication remote monitoring system and program

Abstract

This invention provides a power line communication remote monitoring system and program that can simultaneously and in parallel monitor and control equipment within multiple buildings on a building-by-building basis, and can easily detect abnormalities in equipment within buildings on a building-by-building basis. [Solution] The monitoring control server 1 displays icons of buildings to be monitored on the display terminal 3 in a building icon list screen and monitors them simultaneously in parallel. When a building icon is selected, the status of the equipment to be monitored in each building is displayed on the equipment list screen, and the equipment 21 can be controlled. Furthermore, if an abnormality occurs in the monitored equipment 21, the abnormality of the equipment 21 is displayed on the equipment list screen, and the building icon on the building icon list screen is also changed to an icon indicating that an abnormality has occurred. This is a power line communication remote monitoring system and program.

Description

Technical Field

[0001] The present invention relates to a power line communication (PLC) remote monitoring system, and more particularly to a power line communication remote monitoring system and a program that can easily monitor and control devices installed in a plurality of buildings.

Background Art

[0002] [Conventional Technology] Conventional remote monitoring systems using power line communication (PLC) transmit and receive sensing data of equipment using power lines to and from a monitoring device.

[0003] [Related Technology] In addition, as related prior art, Japanese Patent Application Laid-Open No. 61-051294, "Security and Disaster Prevention Monitoring Central Control System by Power Line Transmission" (Patent Document 1), Japanese Patent Application Laid-Open No. 11-353572, "Automatic Needle Inspection Device" (Patent Document 2), Japanese Patent Application Laid-Open No. 2006-340009, "Lighting Control System Using Power Line Transmission Communication" (Patent Document 3), and Japanese Patent Application Laid-Open No. 2007-228394, "Facility Management System and Facility Management Method" (Patent Document 4) exist.

[0004] Patent Document 1 shows a configuration of a system that transmits signals from various sensors from a transmitting device to a receiving device by power line transmission for centralized monitoring control. Patent Document 2 shows a needle inspection device that transmits needle inspection data of a needle inspection meter from a first relay device to a second relay device via a power line, and transmits it from a line network control device to a needle inspection center and accumulates it in a buffer.

[0005] Patent Document 3 shows a lighting control system that connects a control unit of lighting equipment to a power line by a PLC modem and connects a lighting monitoring control device to a power line by a PLC modem to realize power line transmission communication. Patent Document 4 shows a facility management system that transmits data acquired by sensors of a facility from a transmitting unit in a building to a receiving unit in the building via a power line, and transmits the data to a management device outside the building via a WAN. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 61-051294 [Patent Document 2] Japanese Patent Application Publication No. 11-353572 [Patent Document 3] Japanese Patent Publication No. 2006-340009 [Patent Document 4] Japanese Patent Publication No. 2007-228394 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, conventional remote monitoring systems have the problem that they cannot easily monitor equipment in multiple buildings simultaneously and in parallel on a building-by-building basis, control each piece of equipment, or easily detect abnormalities in equipment in multiple buildings.

[0008] Furthermore, Patent Documents 1 to 4 do not describe a configuration that allows for simultaneous and parallel monitoring and control of equipment within multiple buildings on a building-by-building basis, or for easily detecting abnormalities in equipment within buildings on a building-by-building basis.

[0009] This invention has been made in view of the above circumstances, and aims to provide a power line communication remote monitoring system and program that can simultaneously and in parallel monitor and control equipment in multiple buildings on a building-by-building basis, and that can easily detect abnormalities in equipment within buildings on a building-by-building basis. [Means for solving the problem]

[0010] To solve the problems of the above-mentioned conventional example, the present invention is a power line communication remote monitoring system having a monitoring and control server that performs monitoring and control of equipment on a building-by-building basis by superimposing and transmitting signals from multiple devices installed in multiple buildings onto power line communication, characterized in that the monitoring and control server displays icons of the buildings to be monitored as building icons on a building icon list screen on a connected display terminal, when a specific building icon is selected on the building icon list screen, the status of the equipment to be monitored in the building corresponding to that building icon is displayed on the equipment list screen, and when a specific device is selected on the equipment list screen, that device can be remotely controlled.

[0011] The present invention is characterized in that, in the above-mentioned power line communication remote monitoring system, when an abnormality occurs in a monitored device, the monitoring control server displays the abnormality of the device on the device list screen, and on the building icon list screen, changes the building icon corresponding to the building in which the abnormally installed device is located to an icon indicating that an abnormality has occurred.

[0012] The present invention is characterized in that, in the above-mentioned power line communication remote monitoring system, a noise filter is provided for at least 200V power lines of the power system that perform power line communication.

[0013] The present invention is characterized in that, in the above-mentioned power line communication remote monitoring system, when the equipment to be monitored is a power system and a 200V power line is connected, a connection device for monitoring the status of the equipment is connected to the power line, and the monitoring data obtained by the connection device is transmitted via power line communication using a 100V power line.

[0014] The present invention is characterized in that, in the above-mentioned power line communication remote monitoring system, the monitoring and control server analyzes logs of past monitoring data for the monitored equipment, calculates the efficiency of the equipment's operation in relation to energy saving standards, and diagnoses the operation of the equipment.

[0015] The present invention is characterized in that, in the above-mentioned power line communication remote monitoring system, the monitoring control server predicts the occurrence of an anomaly by inputting logs of monitoring data for a specific period during monitoring of the equipment, using a trained AI that is generated by learning logs of past monitoring data in which anomalies occurred for the equipment being monitored.

[0016] The present invention is characterized in that, in the above-mentioned power line communication remote monitoring system, the monitoring and control server displays the prediction of an abnormality for equipment where an abnormality is predicted on the equipment list screen, and changes the building icon corresponding to the building where the equipment where an abnormality is predicted is installed to an icon indicating an abnormality on the building icon list screen.

[0017] The present invention relates to a processing program that operates on a monitoring and control server that performs monitoring and control of equipment on a building-by-building basis by superimposing and transmitting signals from multiple devices installed in multiple buildings onto power line communication, characterized in that the monitoring and control server displays icons of the buildings to be monitored as building icons on a building icon list screen on a connected display terminal, when a specific building icon is selected on the building icon list screen, displays the status of the equipment to be monitored in the building corresponding to that building icon on an equipment list screen, and when a specific device is selected on the equipment list screen, enables remote control of that device.

[0018] The present invention is characterized in that, in the above program, the monitoring and control server is configured to display an abnormality in the monitored equipment on the equipment list screen when an abnormality occurs in the equipment, and to change the building icon corresponding to the building in which the abnormal equipment is installed on the building icon list screen to an icon indicating that an abnormality has occurred.

[0019] The present invention is characterized in that, in the above program, the monitoring and control server is configured to analyze past monitoring data logs for the monitored equipment, calculate the efficiency of the equipment's operation against energy-saving standards, and diagnose the equipment's operation.

[0020] In the above program, the present invention is characterized in that the monitoring control server is caused to function to input a log of monitoring data for a specific period during the monitoring of a device and predict an occurrence of an abnormality by using a learned AI that is generated by causing the server to learn a log of past monitoring data in which an abnormality has occurred with respect to the device to be monitored and predicts the occurrence of an abnormality.

[0021] In the above program, the present invention is characterized in that the monitoring control server is caused to function to display a prediction of an occurrence of an abnormality for a device for which an occurrence of an abnormality has been predicted on a device list screen, and to change and display a building icon corresponding to a building in which a device for which an occurrence of an abnormality has been predicted is installed into an icon indicating a prediction of an occurrence of an abnormality on a building icon list screen.

[0022] In the above power line communication remote monitoring system, the present invention is characterized in that a local circuit serving as a relay circuit connected to a sensor for monitoring the device in a building is provided, and the local circuit includes a power supply unit that receives power supply from a power line used for power line communication via a first circuit protector and supplies power to a device and a sensor to be connected, and an adapter that converts a measurement signal from the sensor into a signal for power line communication and outputs the signal to the power line via a second circuit protector.

Advantages of the Invention

[0023] According to the present invention, in a power line communication remote monitoring system in which a monitoring control server that performs monitoring control of devices in units of buildings superimposes signals of a plurality of devices installed in a plurality of buildings and transmits and receives them, an icon of a building to be monitored is displayed as a building icon on a building icon list screen on a connected display terminal, and when a specific building icon is selected on the building icon list screen, the state of the devices to be monitored in the building corresponding to the building icon is displayed on a device list screen, and when a specific device is selected on the device list screen, the device can be remotely controlled. Therefore, there is an effect that devices in a plurality of buildings can be easily monitored and controlled simultaneously and in parallel in units of buildings.

[0024] Furthermore, according to the present invention, the monitoring and control server analyzes past monitoring data logs for the monitored equipment, calculates the efficiency of the equipment's operation against energy-saving standards, and diagnoses the equipment's operation as a power line communication remote monitoring system. This has the effect of easily recognizing the energy-saving operation of equipment within a building.

[0025] Furthermore, according to the present invention, when a monitoring control server detects an abnormality in a monitored device, it displays the abnormality on the device list screen, and on the building icon list screen, it changes the building icon corresponding to the building where the abnormal device is installed to an icon indicating that an abnormality has occurred. This power line communication remote monitoring system has the effect of easily detecting abnormalities in equipment within a building on a building-by-building basis. [Brief explanation of the drawing]

[0026] [Figure 1] This is a schematic diagram of the system's configuration. [Figure 2] This is a schematic diagram showing an example of a display terminal screen. [Figure 3] This is a flowchart of the anomaly prediction process for the monitoring and control server. [Figure 4] This is a schematic diagram illustrating a specific example of how this system is operated. [Figure 5] This is a schematic diagram illustrating the phase change. [Figure 6] This is a block diagram of the local circuit configuration. [Figure 7] This is an illustrative diagram of the wiring connections for a noise filter. [Figure 8] This is a diagram illustrating the wiring connections for signal switching. [Modes for carrying out the invention]

[0027] Embodiments of the present invention will be described with reference to the drawings. [Summary of the Embodiment] The power line communication remote monitoring system (this system) according to an embodiment of the present invention allows a monitoring and control server to monitor and control each building by superimposing signals from equipment installed in multiple buildings, such as buildings, onto power line communication (PLC) for transmission and reception. A display terminal connected to the monitoring and control server displays icons for all buildings to be monitored on a building icon list screen, allowing for simultaneous and parallel monitoring. Selecting a building icon displays the status of the equipment to be monitored in that building on an equipment list screen, and allows for control of that equipment. Furthermore, if an abnormality occurs in the monitored equipment, the abnormality of that equipment is displayed on the equipment list screen, and the building icon on the building icon list screen is also changed to an icon indicating that an abnormality has occurred. As a result, it is possible to instantly recognize that an abnormality has occurred in a specific building on the building icon list screen, and to easily recognize abnormalities in specific equipment on the equipment list screen for each building.

[0028] Furthermore, this system stores and accumulates logs of monitoring data from equipment in a building for a specific period. It calculates the efficiency of the equipment against a pre-set standard value based on changes in the monitoring data, and diagnoses whether the equipment operation is energy-efficient or not, making it easy to recognize the energy-saving operation of equipment within the building.

[0029] Furthermore, this system stores and accumulates logs of monitoring data from equipment in a building for a specific period. Based on changes in the monitoring data, it uses AI (Artificial Intelligence) to predict the occurrence of anomalies. The predicted anomaly is displayed on the equipment list screen, and the building icon is also changed to an icon indicating the predicted anomaly. This allows users to instantly recognize the possibility of an anomaly occurring in a particular building on the building icon list screen, and furthermore, to easily recognize the predicted anomaly for a specific piece of equipment on the equipment list screen for each building.

[0030] [This system: Figure 1] This system will be explained with reference to Figure 1. Figure 1 is a schematic diagram of the system's configuration. As shown in Figure 1, this system consists of a monitoring and control server 1, multiple building devices 2 (2a, 2b, 2c in Figure 1), and a display terminal 3, all connected to a network 4. In particular, wireless communication is used to connect the building devices 2 to the network 4.

[0031] [Each part of this system] This section will provide a detailed explanation of each part of this system. [Monitoring and control server 1] The monitoring and control server 1 comprises a control unit 11, a storage unit 12, and an interface unit 13, and is connected to the network 4 via the interface unit 13.

[0032] The control unit 11 reads and executes the processing program stored in the memory unit 12, thereby realizing the monitoring and control functions described below. Furthermore, the memory unit 12 stores and accumulates log data for a specific period of time, including the settings of the monitored equipment on a building-by-building basis, the values ​​of the sensed monitoring data, and the date and time of acquisition. This log data is used for energy saving diagnostics of the equipment and for predicting the occurrence of abnormalities. The interface unit 13 is an interface for connecting the monitoring and control server 1 to external devices, etc.

[0033] [Building Equipment 2] Building equipment 2 is a general term for equipment installed in a building, and specifically basically comprises various types of equipment 21, connection devices 22 that connect to the various types of equipment 21, and communication devices 23 that communicate with the connection devices 22 using power line communication (PLC) and connect to the network 4. Furthermore, there are multiple types of equipment 21 and connection devices 22 installed within the building. Furthermore, power line communication (PLC) is compatible with both 100V (lighting systems) and 200V (power systems). Furthermore, noise countermeasures for the 200V power lines of the power system will be discussed later.

[0034] Equipment 21 is installed in a building and outputs status data (monitoring data) indicating its operating status to the connection device 22, and is controlled by control data from the connection device 22. Examples include pumps, various meters, lighting equipment, automatic doors, fans, air conditioners, solar power generators, elevators, etc. A specific example of equipment 21 in building system 2 will be described later.

[0035] The connection device 22 connects to the equipment 21 and transmits status data to the communication device 23 using power line communication (PLC), and also transmits control data from the communication device 23 to the equipment 21 using power line communication (PLC) to control the equipment 21.

[0036] The communication device 23 transmits status data from the connection device 22 to the monitoring and control server 1 via the network 4, and receives control data from the monitoring and control server 1 via the network 4 and outputs it to the corresponding connection device 2. In other words, the communication device 23 aggregates status data from the connection device 22 and distributes control data from the monitoring and control server 1 to the corresponding connection device 22.

[0037] [Display terminal 3] The display terminal 3 is a computer device that connects to the monitoring and control server 1 via the network 3, and is equipped with a display unit and an operation unit. The display terminal 3 displays a list of building icons corresponding to the buildings to be monitored, as well as a list of equipment for monitoring and controlling the building's equipment 21. The distinctive content displayed on these screens makes it easy to identify abnormalities in multiple buildings. The building icon list screen and equipment list screen will be described later. In addition, the display terminal 3 also displays predictions of malfunctions occurring in the equipment 21 within the building.

[0038] [Network 4] Network 4 is assumed to be the internet, and the data transmitted and received is encrypted and may be a VPN (Virtual Private Network) connection. A VPN connection is an internal network within an organization that uses a virtual private line established via a public network. Since the buildings constructed in urban areas are separated from each other, the communication device 23 of building device 2 and network 4 are connected by wireless communication.

[0039] [Monitoring and control process: Figure 2] The monitoring and control processing in the monitoring and control server 1 will be explained with reference to Figure 2. Figure 2 is a schematic diagram showing an example of a display terminal screen, where (a) is a schematic diagram of the building icon list screen and (b) is a schematic diagram of the building equipment list screen. As shown in Figure 2(a), the display terminal 3 connected to the monitoring and control server 1 displays building icons corresponding to the buildings being monitored in a building icon list screen, and when an abnormality occurs in one of the buildings, the icon changes to indicate the abnormality.

[0040] Furthermore, as shown in Figure 2(b), when a specific building icon in Figure 2(a) is selected, a list of the equipment 21 within that building is displayed on the equipment list screen. The equipment list screen displays the equipment number (No.), equipment name, and data (current monitoring data). When an abnormal building icon is selected on the building icon list screen, the display color of the abnormal equipment on the equipment list screen changes or blinks to allow identification. Furthermore, the system displays the data transitions (changes) over a specific period using the monitoring data log.

[0041] Furthermore, the device list screen may display the device number, name, and data of the malfunctioning device at the top of the list to allow for instant identification of the malfunction. In addition, if an email notification is sent to a pre-configured administrator when a malfunction occurs, the administrator can recognize the malfunction in real time.

[0042] Furthermore, the device list screen is equipped with control buttons for each device 21. Selecting these control buttons allows the user to stop, start, change the settings of, or otherwise control the device 21. Note that control buttons are provided for controllable devices 21; devices 21 that are only used for monitoring do not have control buttons.

[0043] [Energy saving diagnostic process] The monitoring and control server 1 analyzes the log data of past monitoring data stored in the memory unit 12, and for a specific period, it calculates the difference (a positive or negative value relative to the reference value) or deviation (a positive or negative percentage relative to the reference value) from a preset reference value from an energy-saving perspective. Based on the calculated value, it diagnoses the energy-saving status of the device 21 and displays it on the display screen of the display terminal 3. This calculated value relative to the reference value indicates the efficiency in energy saving.

[0044] Specifically, the monitoring and control server 1 displays the baseline values ​​of the equipment 21 and the transition status of the monitoring data as a graph on the display screen of the display terminal 3. If the monitoring data exceeds the baseline values, it diagnoses that energy-saving operation is not being performed, and if the monitoring data falls below the baseline values, it diagnoses that energy-saving operation is being performed, and outputs the diagnosis result. Based on these diagnostic results, it is effective to propose improvements regarding the installation of equipment 21, etc., after the building's completion.

[0045] In the example above, an energy-saving diagnostic process was shown, but the monitoring and control server 1 may also display the timing of component replacement in the device 21 on the display screen of the display terminal 3 based on log data of past monitoring data. In this case, the building icon list screen will change to an icon indicating that the parts of equipment 21 are due for replacement or are nearing replacement, and the equipment list screen will change or flash the display color so that it can be determined that the parts of equipment 21 are due for replacement or are nearing replacement.

[0046] [Anomaly occurrence prediction processing: Figure 3] Next, the equipment anomaly prediction process in the monitoring and control server 1 will be explained with reference to Figure 3. Figure 3 is a flowchart of the anomaly prediction process in the monitoring and control server. First, the monitoring and control server 1 stores past monitoring log data in the memory unit 12. This log data, which shows past anomalies in the equipment 21, is used as training data to train an AI model, generating a trained AI model. This trained AI model is then used to predict the occurrence of anomalies.

[0047] As shown in Figure 3, the monitoring and control server 1 reads log data for a specific period from the storage unit 12 of the currently monitored device 21 (S1) and inputs the log data into the trained AI model corresponding to the device 21 (S2). The trained AI model then outputs the probability that the log data for the device 21 indicates an anomaly (S3). The specific period should preferably be the most recent period.

[0048] The monitoring and control server 1 determines whether there is a high probability of an anomaly occurring based on the probability of an anomaly output from the trained AI model, using a pre-set threshold (S4). If it is determined that there is a high probability of an anomaly occurring (Yes), the monitoring and control server 1 displays "Anomaly Occurrence Prediction" for the device 21 with a high probability of an anomaly occurring on the device list screen of the display device 3 (S5), and also changes the building icon for the building in which the device 21 is installed to an "Anomaly Occurrence Prediction" icon on the building icon list screen (S6), and then terminates the process. Furthermore, if the determination process S4 determines that there is not a high probability of an abnormality occurring (i.e., if the result is No), the process terminates.

[0049] As an example of how to display the normal, abnormal, and predicted abnormal status of building icons, for example, based on the results of monitoring or abnormality prediction processing, normal buildings may be displayed with a green building icon, buildings with abnormal status may be displayed with a red building icon, and buildings with a high probability of abnormal status may be displayed with a yellow or orange building icon. In addition, red, yellow, or orange displays may be made to blink.

[0050] [Specific example of this system's operation: Figure 4] Next, we will explain a specific example of the operation of this system with reference to Figure 4. Figure 4 is a schematic diagram of a specific example of the operation of this system. As shown in Figure 4, this system has a monitoring and control server 1 and a display terminal 3 for remote monitoring (management) and control connected to a cloud network 4, and multiple building devices 2 are wirelessly connected to the cloud by a gateway (GW) 23b of a communication device 23.

[0051] Then, a PLC master unit 23a that aggregates data is connected to the gateway (GW) 23b, and various devices 21 are connected to the PLC master unit 23a via power lines. Each device 211 is equipped with a PLC adapter corresponding to the connection device 22. Equipment 21 includes lighting, automatic doors, pumps, meters, fans, air conditioners, solar power conditioners, outdoor units, and cubicles. A cubicle is a metal box (enclosure) that houses equipment that transforms high-voltage electricity (6,600-66,000V) sent from a power plant into 100V or 200V electricity usable at the facility.

[0052] [Noise countermeasures in PLCs] Next, we will explain noise countermeasures in the power line communication (PLC) of this system. Noise reduction techniques include the installation of noise filters and phase shifting. Phase shifting techniques will be explained with reference to Figure 5. Figure 5 is a schematic diagram illustrating phase shifting.

[0053] [Installing a noise filter] In this system, while noise is less likely to occur in the 100V power lines of the lighting system, noise is more likely to occur in the 200V power lines of motors or air conditioners. Therefore, when superimposing a signal on a 200V power line, noise in the 200V power line can be reduced by installing a noise filter between the connection device 22 and the communication device 23.

[0054] Furthermore, it is desirable to install a noise filter in the connection device 22 at the part where the signal from the communication device 23 is input, and in the communication device 23 at the part where the signal from the connection device 22 is input.

[0055] [Phase change: Figure 5] In this system, as shown in Figure 5, a 200V power line is connected to the power system equipment 21, and the sensor connection device 22 is connected to this 200V power line to output sensing data (monitoring data) to the PLC slave unit's communication device 23 via a 100V power line. The PLC slave unit's communication device 23 then transmits the sensing data to the PLC master unit 23a.

[0056] In this way, the sensing data acquired by the connection device 22 is output to the PLC slave unit via a 100V power line and transmitted to the PLC master unit 23a via a 100V power line, enabling power line communication (PLC) using a 100V power line, thereby reducing noise.

[0057] [Local circuit: Figure 6] The local circuit in this system will be explained with reference to Figure 6. Figure 6 is a block diagram of the local circuit configuration. The local circuit 30 is a relay circuit that receives sensor signals (measurement signals) from the equipment to be sensed (sensor 35) and sends the measurement signals to the PLC line. The local circuit 30 is located within the connection device 22 shown in Figure 1.

[0058] As shown in Figure 6, the local circuit 30 includes circuit protectors (CPs) 31a and 31b, a PLC adapter 32, a power supply unit 33, and a remote I / O 34. The remote I / O 34 is connected to the sensor 35.

[0059] CP31a and CP31b are circuit breakers (NFB) or circuit interrupters. CP31a is used to send the measurement signal from sensor 35 to the PLC line, and CP31b is for the power line. CP31b is connected to a 100V or 200V power line and supplies power to the power supply unit 33, which in turn provides power to the remote I / O 34 and sensor 35.

[0060] The remote I / O 34 outputs the measurement signal from the sensor 35 to the PLC adapter 32, which converts it into PLC data and outputs it to the CP 31a. The CP 31a outputs the PLC data from the PLC adapter 32 to the power line.

[0061] In this way, by separating the equipment and power line that supplies power to the power supply unit 33 (CP31a, power supply unit 33, remote I / O 34, sensor 35) from the measurement line that sends out the measurement signal (sensor 35, remote I / O 34, PLC adapter 32, CP31a), the noise affecting the power supply unit 33 does not affect the PLC adapter 32, and the measurement signal can be transmitted accurately, thus providing noise countermeasures.

[0062] Sensor 35 includes accelerometers (vibration meters), temperature and humidity sensors, and water leak sensors. In particular, leak sensors are installed in toilets, kitchenettes, and on the outer surfaces of pipes to detect water leaks.

[0063] [Wiring connection of the noise filter: Figure 7] Next, we will explain the wiring connections for the noise filter with reference to Figure 7. Figure 7 is an illustrative diagram of the wiring connections for the noise filter. Figure 7 shows an example of the connection of a power conditioner for a solar power generation system. As shown in Figure 7, a power conditioner (PCS) 42 is connected to the R, S, and T phases of a 200V three-phase AC power supply via a noise filter (NF) 41. The PCS42 is a device that converts electricity generated by solar power generation systems and home fuel cells into a form that can be used in homes and other environments. This system monitors the status of the PCS42.

[0064] Furthermore, the lead wires input to NF41 are branched and connected to the PLC adapter slave unit (PLC slave) 43, and the lead wires from the R phase and T phase of the three-phase AC are connected to the PLC adapter master unit (PLC master) 44. By connecting NF41 before the PCS42, which is prone to generating harmonic noise, and connecting PLC-43 to the lead wire connecting the three-phase AC and NF41, the effects of harmonic noise can be reduced.

[0065] [Wiring connection for signal switching: Figure 8] Figure 5 explains phase switching as a noise reduction measure, but Figure 8 will explain the wiring connections for specific noise reduction measures using signal switching. Figure 8 is an illustrative diagram of the wiring connections for signal switching. As shown in Figure 8, the PLC master units (PLC master) 51a and 51b are connected by R-phase and T-phase lead wires of a 200V three-phase AC power supply, and the booster pump (boost pump) 52 is connected by R-phase, S-phase, and T-phase lead wires.

[0066] A vibration sensor 53a is attached to the voltage booster P52, and a current sensor 53b is provided on the lead wire from the T phase to the voltage booster P52. The vibration sensor 53a is connected to remote I / O 54a, and the current sensor 53b is connected to remote I / O 54b. The outputs from remote I / O 54a and 54b are input to the PLC slave unit (PLC slave) 55 at 200V, while the measurement signals from sensors 53a and 53b are output via RS485 or LAN.

[0067] The output power from PLC sub-unit 55 is wired to the 100V R phase and N phase via signal switching. PLC masters 56a and 56b are connected to the 100V R phase and N phase, the lead wires from the R phase and N phase are connected to the 100V equipment 57, and the lead wires branched from those lead wires are connected to the PLC sub-equipment 58.

[0068] Harmonic noise often occurs on power lines (200V), but when noise removal is difficult using noise filters such as those shown in Figure 7, signal transfer to a nearby 100V circuit reduces the impact of harmonic noise generated in the lead wire to voltage booster P52 on the PLC sub-unit 55, thereby avoiding the noise's influence on signals of other target equipment.

[0069] [Effects of the embodiment] According to this system, the monitoring and control server 1 monitors and controls each building by superimposing the signals of equipment 21 installed in multiple buildings onto power line communication (PLC) for transmission and reception. The display terminal 3 connected to the monitoring and control server 1 displays icons of the buildings to be monitored on a building icon list screen, allowing for simultaneous and parallel monitoring. Selecting a building icon displays the status of the monitored equipment in each building on an equipment list screen and allows control of the equipment 21. Furthermore, if an abnormality occurs in a monitored equipment 21, the abnormality of that equipment 21 is displayed on the equipment list screen, and the building icon on the building icon list screen is also changed to the icon indicating the abnormality. This allows for instant recognition of an abnormality in a specific building on the building icon list screen, and furthermore, makes it easy to recognize abnormalities in specific equipment on the equipment list screen for each building.

[0070] Furthermore, according to this system, the monitoring and control server 1 stores logs of monitoring data from the equipment 21 in the building and accumulates them for a specific period. The system calculates the efficiency of the equipment 21 against a pre-set standard value from the perspective of energy saving based on the changes in the monitoring data, and diagnoses whether or not the operation of the equipment 21 is energy-efficient. This has the effect of making it easy to recognize the energy-saving operation of the equipment 21 in the building.

[0071] Furthermore, according to this system, the monitoring and control server 1 stores logs of monitoring data from equipment 21 in the building for a specific period, and uses AI to predict the occurrence of anomalies based on changes in the monitoring data. The system displays the predicted anomaly for the equipment on the equipment list screen, and also changes the building icon to an icon indicating the predicted anomaly. This allows for instant recognition of the possibility of an anomaly occurring in a particular building on the building icon list screen, and furthermore, makes it easy to recognize the predicted anomaly for a specific piece of equipment on the equipment list screen for each building.

[0072] According to this system, when superimposing a signal onto a 200V power line for a power system such as a motor or air conditioner in a power line communication (PLC) system, a noise filter is installed between the connection device 22 and the communication device 23, which has the effect of reducing noise on the 200V power line.

[0073] According to this system, when the monitored equipment 21 is a power system and a 200V power line is connected to it, a connection device 22 is connected to the power line to monitor the status of the equipment 21, and the monitoring data obtained by the connection device 22 is transmitted via power line communication over a 100V power line. This has the effect of reducing noise on the 200V power line.

[0074] This system allows for the selection of monitored equipment (monitoring points) based on the completion drawings or the operation of the building after completion, enabling customization and allowing for system downsizing.

[0075] Furthermore, this system allows for direct sensing and control of target equipment listed in the equipment management items, thereby contributing to increased efficiency and reduced manpower in building equipment management. [Industrial applicability]

[0076] The present invention is suitable for a power line communication remote monitoring system and program that can simultaneously and in parallel monitor and control equipment in multiple buildings on a building-by-building basis, and can easily detect abnormalities in equipment within buildings on a building-by-building basis. [Explanation of Symbols]

[0077] 1…Monitoring / control server, 2(2a,2b,2c)…Building equipment, 3…Display terminal, 4…Network, 11…Control unit, 12…Storage unit, 13…Interface unit, 21…Equipment, 22…Connection device, 23…Communication device, 30…Local circuit, 31a,31b…Circuit protector (CP), 32…PLC adapter, 33…Power supply unit, 34…Remote I / O, 35…Sensor, 41…Noise filter (NF), 42…Power conditioner (PCS), 43…PLC slave unit, 45…PLC master unit, 51a,51b…PLC master unit, 52…Pressure booster pump (Pressure booster P), 53a…Vibration sensor, 53b…Current sensor, 54a,54b…Remote I / O, 55…PLC slave unit, 56a,56b…PLC master unit, 57...100V equipment, 58...PLC slave unit

Claims

1. A power line communication remote monitoring system having a monitoring and control server that performs monitoring and control of multiple devices installed in multiple buildings on a building-by-building basis by superimposing and transmitting signals from multiple devices onto power line communication, The power line communication remote monitoring system is characterized in that the monitoring and control server displays icons of buildings to be monitored as building icons on a building icon list screen on a connected display terminal, displays the status of equipment to be monitored in the building corresponding to the building icon on an equipment list screen when a specific building icon is selected on the building icon list screen, and enables remote control of equipment when a specific equipment is selected on the equipment list screen.

2. The power line communication remote monitoring system according to claim 1, characterized in that when an abnormality occurs in a monitored device, the monitoring and control server displays the abnormality of the device on the device list screen, and changes the building icon corresponding to the building where the abnormally installed device is located on the building icon list screen to an icon indicating that an abnormality has occurred.

3. The power line communication remote monitoring system according to claim 1 or 2, characterized in that, for power lines used for power line communication, noise filters are provided for at least 200V power lines of the power system.

4. The power line communication remote monitoring system according to claim 1 or 2, characterized in that, when the equipment to be monitored is a power system and a 200V power line is connected, a connection device for monitoring the status of the equipment is connected to the power line, and the monitoring data obtained by the connection device is transmitted via power line communication using a 100V power line.

5. The power line communication remote system according to claim 1 or 2, characterized in that the monitoring and control server analyzes logs of past monitoring data for the monitored equipment, calculates the efficiency of the equipment's operation in relation to energy saving standards, and diagnoses the operation of the equipment.

6. The power line communication remote system according to claim 1 or 2, characterized in that the monitoring and control server predicts the occurrence of an anomaly by inputting logs of monitoring data for a specific period while the equipment is being monitored, using a trained AI that is generated by learning logs of past monitoring data in which anomalies occurred for the equipment to be monitored.

7. The power line communication remote system according to claim 6, characterized in that the monitoring and control server displays a prediction of an abnormality for equipment that is predicted to have an abnormality on the equipment list screen, and changes the building icon corresponding to the building where the equipment that is predicted to have an abnormality is installed to an icon indicating a prediction of an abnormality on the building icon list screen.

8. A processing program that operates on a monitoring and control server that performs monitoring and control of multiple devices installed in multiple buildings on a building-by-building basis by superimposing and transmitting signals from multiple devices onto power line communications, The program is characterized in that the monitoring and control server displays icons of buildings to be monitored as building icons on a building icon list screen on a connected display terminal, displays the status of the equipment to be monitored in the building corresponding to the building icon on an equipment list screen when a specific building icon is selected on the building icon list screen, and enables remote control of the equipment when a specific piece of equipment is selected on the equipment list screen.

9. The program according to claim 8, characterized in that the monitoring and control server is configured to display an abnormality in the equipment on the equipment list screen when an abnormality occurs in the equipment being monitored, and to change the building icon corresponding to the building in which the abnormal equipment is installed on the building icon list screen to an icon indicating that an abnormality has occurred.

10. The program according to claim 8 or 9, characterized in that the monitoring and control server is configured to analyze logs of past monitoring data for the monitored equipment, calculate the efficiency of the equipment's operation in relation to energy saving standards, and diagnose the operation of the equipment.

11. The program according to claim 8 or 9, characterized in that the monitoring and control server is made to function by inputting logs of monitoring data for a specific period while the device is being monitored, using a trained AI that is generated by learning logs of past monitoring data in which abnormalities occurred for the device to be monitored, and which predicts the occurrence of abnormalities.

12. The program according to claim 11, characterized in that the monitoring and control server is configured to display a prediction of an abnormality for equipment that is predicted to have an abnormality on the equipment list screen, and to change the building icon corresponding to the building where the equipment that is predicted to have an abnormality is installed on the building icon list screen to an icon indicating a prediction of an abnormality.

13. A local circuit is provided within the building, which serves as a relay circuit connected to a sensor for monitoring the equipment. The power line communication remote monitoring system according to claim 1 or 2, characterized in that the local circuit includes a power supply unit that provides power to equipment and sensors that receive power from a power line used for power line communication via a first circuit protector, and an adapter that converts the measurement signal from the sensor for power line communication and outputs it to the power line via a second circuit protector.

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