JP2005301717A - Wide area monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wide area monitoring system allowing maintenance work executed before an abnormality is found in a device to be monitored by remotely controlling the device to be monitored through a programmable controller (PLC) from a cellular telephone or the like. <P>SOLUTION: The wide area monitoring system is provided with: a surveillance camera 1 photographing the device S to be monitored; the PLC 2 applying input/output control to the device to be monitored S and recording surveillance data on the surveillance camera 1 and input/output control data on the device to be monitored S; a data server 3 comparing the surveillance data with the past data in an abnormal mode based on the present picture photographed with the surveillance camera 1 and the surveillance data of the PLC 2 and calculating a warning forecast for the device to be monitored S; external terminal equipment 4 constantly carried by a guard; a warning forecast transmission means transmitting the warning forecast to the external terminal equipment 4 from the PLC 2; a data assurance means assuring the surveillance data of the PLC 2 from the external terminal equipment; and a remote control means operating the input/output control for the device to be monitored S from the external terminal equipment by means of the PLC 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  According to the present invention, a prediction alarm is transmitted to a mobile phone or the like based on various monitoring data of a monitored device recorded in a programmable controller (hereinafter referred to as a PLC), and a monitor is used for various monitoring from the mobile phone or the like. And a wide area monitoring system that directly operates a monitored device controlled by a PLC from a mobile phone or the like.

  As a conventional monitoring device, there is a remote monitoring control system described in Patent Document 1, an image trend monitoring device described in Patent Document 2, and the like. Also, Patent Document 3 describes a method for creating an abnormality diagnosis reference pattern for automatically creating a reference pattern for diagnosis of a sequence program (PLC).

  In the remote monitoring and control system described in Patent Document 1, when monitoring information is generated, a transmission destination stored in the transmission information storage area is searched using transmission information search means, and a monitoring station is determined to be transmitted. Thereafter, the information transmission search means is used to transmit the generated monitoring information to the monitoring station that needs it.

  The monitoring device described in Patent Document 2 is a device that digitizes an analog image signal obtained from a camera, stores a digital image signal with a time stamp, and searches for an image using the time stamp as a keyword.

On the other hand, the method for creating an abnormality diagnosis reference pattern described in Patent Document 3 changes the state of sequence elements such as internal contacts of the sequencer, control contacts and sensors in the system each time the sequencer executes a predetermined sequence program. Read in time series and record it as sequence state change information. From these recorded sequence state change information, extract other sequence elements with a certain regularity for the operation of the specified sequence element. Then, change information of other sequence elements extracted for each identified sequence element is collected and a reference pattern for diagnosis is automatically created.
Japanese Patent Application Laid-Open No. 5-27669 Japanese Patent No. 3077137 Japanese Patent No. 3277247

  When a system that searches stored information, such as the remote monitoring control system described in Patent Document 1, is used, it is necessary to search for transmission destinations for each piece of monitoring information, and the number of monitoring stations increases. In addition, the time until the destination is determined increases, and the real-time property of monitoring information transfer cannot be maintained. In particular, when monitoring information that is generated regularly and in large quantities, such as image information, is used, the processing time for monitoring information transmission destination search significantly affects the real-time property of monitoring information transmission.

  Further, in the monitoring device described in Patent Document 2, when an external signal is input, an image from a time point a predetermined time before the external signal is input based on a time stamp attached to the image. Image collection means for cutting out from the first storage means and dropping the cut-out image into the second storage means is provided.

  Therefore, in Patent Document 2, as a procedure until the monitored device is controlled based on the monitoring information, from the arrival of an external signal notifying that some change has occurred in the monitored device, until the change is reached The work of reconfirming the image back to the above image and the work of actually controlling the monitoring device in response to this change are required. The external signal that informs the change is a signal that senses an abnormality linked to an alarm alarm or the like. Therefore, the monitoring device described in Patent Document 2 cannot control the monitored device when the monitored device is still in a normal state, that is, before the monitored device becomes abnormal. In this way, in maintenance control after sensing an abnormality, there is a possibility that execution of maintenance control will be too late.

  On the other hand, the method for creating an abnormality diagnosis reference pattern in Patent Document 3 extracts other sequence elements having a certain regularity with respect to the operation of the specified sequence element, and extracts each sequence element specified. This is a method for automatically creating a reference pattern for diagnosis by collecting change information of sequence elements. Therefore, the abnormality diagnosis reference pattern is based on the change information of the sequence element.

  This change information uses, for example, change information that is determined to be abnormal when a level exceeding a certain level or some level is set and the level exceeds or falls below that level. Japanese Patent Application Laid-Open No. 2004-228561 allows an abnormality diagnosis reference pattern to be constantly updated based on this change information. However, in this method for creating an abnormality diagnosis reference pattern, in order to determine an abnormality, as described above, the change information must be at a point when it exceeds a certain level. That is, in order to determine the abnormality of the monitoring device using this abnormality diagnosis reference pattern, it is necessary to cause some abnormal situation in the monitoring device. Therefore, even if it is useful as an abnormality diagnosis reference pattern used to issue an alarm after an abnormality occurs or to control a monitoring device, this pattern can be used as a prediction alarm for predicting the possibility of an abnormality occurring before an abnormality occurs, or for this prediction alarm. Cannot be used to perform pre-control based on.

  In addition, in conventional monitoring systems and monitoring systems that use abnormality diagnosis reference patterns, the abnormality status of the monitored device is between the time immediately after the occurrence of the abnormality and the time when the alarm is issued and the worker confirms until the actual maintenance work. Will continue. Therefore, it is extremely difficult for a worker to quickly perform maintenance work on the monitored device before an abnormality occurs in the monitored device.

  Therefore, the present invention was created to solve the above-described problems. The present information is monitored in real time, and a prediction alarm is transmitted to a mobile phone or the like based on the monitoring information of the PLC. It is an object of the present invention to provide a wide area monitoring system that enables maintenance work before an abnormality occurs in the monitored device by directly controlling the monitored device via the.

  In order to solve the above-described problem, the first means of the present invention performs the input / output control of the monitoring camera 1 that captures the monitored device S and the monitored device S, and the monitoring data and monitored data of the monitoring camera 1. Based on the PLC 2 that records the input / output control data of the monitoring device S and the current captured image of the monitoring camera 1 and the monitoring data of the PLC 2, the past abnormal data is compared to calculate the alarm prediction of the monitored device S. In a wide area monitoring system having a data server 3 and an external terminal 4 that is always carried by a monitor, an alarm prediction transmitting means for transmitting a prediction alarm from the PLC 2 to the external terminal 4 when an alarm is predicted by the data server 3; And a data confirmation means for confirming the monitoring data of the PLC 2 from the external terminal, and a remote operation means for operating the input / output control of the monitored device S by the PLC 2 from the external terminal. That.

  The second means is that the monitoring camera 1, the PLC 2, and the data server 3 are always in a communication state, before and after the change of the monitoring data in the monitored device S, and the current status of the monitored device S The video and control data of the monitored device S are collectively managed by the data server.

  In the third means, the alarm prediction of the monitoring device is based on the value of the sine angle formed by the elapsed time on the line graph in which the vertical axis is the data change amount and the horizontal axis is the elapsed time and the data change amount. The possibility that the monitored device S will enter an abnormal state in the near future within the normal operating range is predicted.

  The data confirmation means of the fourth means is freely selectable between video confirmation means for confirming the current image of the monitoring camera 1 and monitoring data in the PLC 2 and data reading means for confirming input / output control data in the PLC 2. .

  As a fifth means for solving the problem, a mobile phone, a portable information terminal, or a portable personal computer is used as the external terminal.

  According to claim 1 of the dehumidifying device of the present invention, when an alarm is predicted by the data server 3, alarm prediction transmission means for transmitting a prediction alarm from the PLC 2 to the external terminal 4, and monitoring data of the PLC 2 from the external terminal are confirmed. Since the data confirmation means and the remote operation means for operating the input / output control of the monitored device S by the PLC 2 from an external terminal, the monitoring staff can be used even if the monitored device S is installed in a wide range. Realize highly efficient monitoring and maintenance work wherever you are.

  Further, according to claim 2, since the video before and after the change of the monitoring data in the monitored device S, the current video of the monitored device S, and the control data of the monitored device S are collectively managed by the data server, In addition to monitoring current information in real time, past data can also be confirmed, enabling rational monitoring.

  According to the alarm prediction of the third aspect, since the possibility that the monitored device S will be in an abnormal state in the near future within the range of normal operation is predicted, maintenance work before an abnormality occurs in the monitored device is enabled. Therefore, unlike the conventional monitoring apparatus, there is no possibility that the monitored device S is left unattended from immediately after the occurrence of an abnormality until the actual maintenance work, and an extremely safe monitoring system and quick maintenance work are possible.

  According to the data confirmation means of claim 4, the video confirmation means for confirming the current image of the monitoring camera 1 and the monitoring data in the PLC 2 and the data reading means for confirming the input / output control data in the PLC 2 are freely selectable. Monitoring and maintenance work by workers can be performed in real time.

  By using a mobile phone, a portable information terminal, or a portable personal computer as the external terminal of claim 5, the worker can perform monitoring and maintenance by using general equipment. In addition, not only the video of the monitoring camera 1 or the monitoring data of the PLC 2 can be checked with such a mobile phone or the like, but also the monitored device S can be operated through the PLC 2, so that the monitoring staff can Even if the user is not near S, it is possible to perform confirmation work and remote operation with a sense of reality on the same screen of the external terminal 4 in a unified manner. As a result, it can be used as an indispensable multifunction device in the future trend of labor saving and remote control.

  As described above, according to the present invention, current information is monitored in real time, a prediction alarm is transmitted to a mobile phone or the like based on the monitoring information of the PLC, and the monitored device is directly controlled from the mobile phone or the like via the PLC. By doing so, the industry's first effect such as enabling maintenance work before an abnormality occurs in the monitored device is achieved.

  The best mode of the dehumidifying apparatus of the present invention is provided with a monitoring camera 1 for photographing the monitored device S. A PLC 2 is provided that performs input / output control of the monitored device S and records monitoring data of the monitoring camera 1 and input / output control data of the monitored device S. A data server 3 is provided which compares the current captured image of the monitoring camera 1 and the monitoring data of the PLC 2 with the past abnormal data and calculates an alarm prediction of the monitored device S. An external terminal 4 that is always carried by a monitor is provided. The alarm prediction of the monitoring device predicts the possibility that the monitored device S will be in an abnormal state in the near future during normal operation. The vertical axis is the amount of data change and the horizontal axis is the elapsed time. Prediction is based on the value of the sine angle formed by the elapsed time on the line graph and the amount of data change. A warning prediction transmission means is provided for transmitting a prediction warning from the PLC 2 to the external terminal 4 when a warning is predicted by the data server 3. Data confirmation means for confirming the monitoring data of the PLC 2 from an external terminal is provided. Remote operation means for operating input / output control of the monitored device S by the PLC 2 from an external terminal is provided. By configuring in this way, the original purpose is achieved.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. The basic configuration of the system of the present invention includes a monitoring camera 1, a PLC 2, a data server 3, and an external terminal 4 (see FIG. 1).

  The monitoring camera 1 is a camera that constantly shoots the monitored device S, and records a real-time video in the PLC 2 as monitoring data. In addition, a real-time video and recorded monitoring data can be viewed from an external terminal 4 to be described later. The video of the surveillance camera 1 is recorded as a JPG image on a recording medium with about 640 dots × 480 dots. In this state, video cannot be projected on the mobile phone, so that the external terminal 4 can check the real-time video and past monitoring data in the PLC 2 by simplifying the video by compression processing.

  PLC is an abbreviation for Programmable Logic Controller. The abbreviation has been changed from PC (Programmable Controller) in the amendment of the international standard IEC61131-1, and includes what has been referred to as sequences and sequence programs. . The PLC 2 according to the present invention includes a control function for performing input / output control of the monitored device S, a recording function for recording monitoring data of the monitoring camera 1 and input / output control data of the monitored device S, and information stored in the external terminal 4. And a transmission function for transmitting.

  The control function of PLC2 includes various switches, motorized valves, various flow meters linked to monitored device S, power measurement sensor, pressure control sensor, temperature adjustment sensor, human sensor, ultrasonic sensor, etc. Input / output control of the various sensors (see FIG. 2). In addition, it controls the operation of main equipment such as air conditioners, various control panels, FE-NET panels, air conditioners, compressors, inverters, cooling facilities, and various pumps. This control function functions when executing remote control means for operating various controls such as input / output control of the monitored device S by the PLC 2 from the external terminal 4.

  The monitoring data of the monitoring camera 1 and the input / output control data of the monitored device S are recorded by the recording function of the PLC 2. In addition, past control data executed for the input / output control device described above is also recorded. These data can be freely accessed from the data server 3 and viewed from the external terminal 4.

  The transmission function of the PLC 2 is a function for transmitting information to the external terminal 4 mainly by mail. That is, a prediction alarm is transmitted to the address of the supervisor stored in advance in each PLC 2. The mail mainly transmits a prediction warning, and functions as a warning prediction transmission means for transmitting a prediction warning from the PLC 2 to the external terminal 4 when a warning is predicted by the data server 3 described later. The monitor who has received this prediction alarm executes the data confirmation means, connects to the PLC 2 from the external terminal 4, calls real-time video and various recorded monitoring data, and confirms on the external terminal 4.

  The data server 3 uses a PC (personal computer) to calculate an alarm prediction of the monitored device S. This alarm prediction is a calculation function that predicts the possibility that the monitored device S will be in an abnormal state in the near future within the range of normal operation, and the current captured image of the monitoring camera 1, various monitoring data of the PLC 2, and the past From the abnormality history that occurred, the tendency to become abnormal is analyzed and calculated based on the programmed data.

  This alarm prediction is predicted from the elapsed time on the line graph and the amount of data change. FIG. 3 shows an algorithm for calculating an alarm prediction. That is, the vertical axis is set as the data change amount, the horizontal axis is set as the elapsed time, and the monitored device S is predicted to be abnormal depending on the value of the sine angle indicating the data change amount. In the figure, symbol H indicates an abnormally high level of water level, and symbol L indicates an abnormally low level of water level. Normally, an alarm is issued when the position of H or L is exceeded. The calculation of the alarm prediction is repeated every T time, but the T time can be set to a predetermined time or after automatic recognition. In this way, the determination is always made based on the “time vs. ascending (falling) level” angle, the prediction control is repeated, and when an alarm is predicted, the prediction alarm is transmitted before this alarm.

  In addition, since various data comparisons and arithmetic processes can be performed based on the enormous data of the PLC 2, wide area monitoring can be performed assuming all situations. Furthermore, by notifying the monitoring staff of the prediction alarm, it is possible to perform an appropriate maintenance control operation before the alarm at the time of abnormality.

  In order to always repeat the predictive control by the data server 3, the surveillance camera 1, the PLC 2, and the data server 3 are always in a communication state. Then, the data before and after the change of the monitoring data in the monitored device S, the current image of the monitored device S, and the control data of the monitored device S are collectively managed by the data server. By such collective management, it is possible to leave a state similar to the scene in which a supervisor finds a trouble at the site as data. Moreover, since the state + video before the occurrence of the abnormality of each monitored device S is recorded, an extremely advanced history can be left. As a result, it is possible to individually check all the data that the PLC 2 has regarding the current monitored device S from the external terminal 4 and to display and confirm the past and current videos on the same screen.

  As the external terminal 4, a communication device capable of sending and receiving mail using an Internet line is selectively used, such as a mobile phone 4A, a personal digital assistant (PDA) 4B, and a portable personal computer (mobile PC) 4C. When the mobile phone 4A is used for the external terminal 4, it is extremely excellent in portability and versatility. Therefore, the external terminal is ideal for carrying various monitoring data and operating the PLC 2 by a monitor. 4 Further, when the personal digital assistant (PDA) 4B is used as the external terminal 4, it can be confirmed more clearly than the image of the mobile phone 4A. In addition, bit operation and register operation of the PLC 2 or simple program change can be performed. Further, when a portable personal computer (mobile PC) 4C is used for the external terminal 4, it is possible to display a highly accurate video, and it is possible to display a time series display of past data and a list of abnormal alarm histories. Also, it is possible to change the program of the PLC 2 or add a new monitored device S.

  The system of the present invention is provided with such data confirmation means for confirming the monitoring data of the PLC 2 from the external terminal 4 and remote operation means for operating the input / output control of the monitored device S by the PLC 2 from the external terminal 4. ing.

  The data confirmation unit further allows the image confirmation unit and the data reading unit to be freely selected. That is, the current image of the monitoring camera 1 and the monitoring data in the PLC 2 are confirmed by the image confirmation means. On the other hand, the video confirmation means confirms the input / output control data in the PLC 2.

  The remote operation means is for operating the input / output control of the monitored device S by the PLC 2 from the external terminal 4, and by this remote operation means, the input / output control of the various sensors described above, the control of various main equipment devices, etc. Is to do.

  The system according to the present invention enables a new operation which has not been conventionally performed. Here, the difference between the conventional system and the system of the present invention will be described with reference to FIGS. For example, assuming that the monitoring device S is a cooling device using a water tank, it is in a normal state at step 100 shown in FIGS. From here, conventionally, as shown in FIG. 5, since the water level rises faster than usual, the outlet temperature of the cooling water rises (step 110), and when an abnormal water level of the water tank occurs (step 120), an abnormality alarm is issued. It is emitted (step 130), and the monitoring person conducts investigation and maintenance work on site (step 140).

  On the other hand, in the system of the present invention, since the predictive control is always repeated in step 200 shown in FIG. 4, the prediction that the water temperature level becomes abnormal is determined (step 210), and the prediction that the water level becomes abnormal is determined (step 210). Step 220). Next, these predictive alarms are transmitted from the PLC 2 by e-mail to the external terminal 4 (step 300), and the monitoring person can monitor the water level, pump status from the monitoring data in the PLC 2 via the external terminal 4. The state of the valves, pressure, flow rate, and other necessary data are confirmed with a mobile phone or the like (step 400). As a result, when a state in which the discharge valve is closed is found from the monitoring data, the monitored device S is operated from the external terminal 4 via the PLC 2 and the discharge valve is opened to avoid a system abnormality ( Step 500).

  In FIG. 1, reference numeral 5 denotes a switching HUB, reference numeral 6 denotes a touch panel, reference numeral 7 denotes a router, and reference numeral 8 denotes an uninterruptible device. Further, the present invention is not limited to the above-described embodiments, and design changes and the like can be freely made without departing from the scope of the present invention.

It is the schematic which shows one Example of this invention system. It is a principal part schematic diagram which shows one Example of this invention system. It is a figure which shows the algorithm which calculates the warning prediction of this invention. It is a block diagram which shows this invention system. It is a block diagram which shows the conventional system.

Explanation of symbols

1 surveillance camera 2 PLC
3 Data Server 4 External Terminal 4A Mobile Phone 4B Personal Digital Assistant (PDA)
4C Portable PC (Mobile PC)
5 Switching HUB
6 Touch panel 7 Router 8 Uninterruptible power supply

Claims (5)

  A monitoring camera that captures an image of the monitored device, an input / output control of the monitored device, a PLC that records monitoring data of the monitoring camera and an input / output control data of the monitored device, a current captured image of the monitoring camera, and the PLC In a wide-area monitoring system that has a data server that calculates alarm predictions of monitored devices by comparing with past abnormal data based on monitoring data, and an external terminal that is always carried by the observer, the data server issues an alarm. When predicted, an alarm prediction transmission means for transmitting a prediction alarm from the PLC to the external terminal, a data confirmation means for confirming the monitoring data of the PLC from the external terminal, and an input / output of the monitored device by the PLC from the external terminal A wide-area monitoring system comprising a remote control means for operating control.   The monitoring camera, the PLC, and the data server are always in a communication state, and before and after the change of the monitoring data in the monitored device, the current video of the monitored device, and the control data of the monitored device The wide-area monitoring system according to claim 1, which is collectively managed by a data server.   The alarm prediction of the monitoring device is based on the value of the sine angle formed by the elapsed time on the line graph in which the vertical axis is the data change amount and the horizontal axis is the elapsed time, and the data change amount. The wide-area monitoring system according to claim 1, wherein the possibility of becoming an abnormal condition in the near future is predicted within the operating range.   2. The wide area according to claim 1, wherein the data confirmation means is capable of selecting a video confirmation means for confirming a current image of the surveillance camera and monitoring data in the PLC and a data reading means for confirming input / output control data in the PLC. Monitoring system. 2. The wide area monitoring system according to claim 1, wherein a mobile phone, a portable information terminal, or a portable personal computer is used as the external terminal.

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