JPH11331959A - Broad area remote supervisory system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow supervisory personnel to set an accurate state judgment in the broad area remote supervisory system that employs communication channels such as public lines. SOLUTION: The system has pluralities of distributed plants 10 each having a data collection function 11 that collects an instantaneous value of various data and a data transmission function 12 that sends the data collected by the data collection function 11 in a prescribed cycle, also has a central supervisory center 20 provided with a data reception function 21 that receives various data sent from the data transmission function 12, a communication delay supervisory function 24 that supervises whether or not the data reception function 21 receives the data in a prescribed cycle and provides an output of an unreliable display when reception of data is delayed, and a display function 22 that displays the data received by the data reception function 21 and the unreliable display outputted from the communication delay supervisory function 24 on a supervisory screen and has a public line 30 interconnecting the plants 10 and the central supervisory center 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a case where a plurality of distributed facilities and equipment are collectively monitored, for example, a monitoring system of a plurality of drainage pump stations distributed in a river basin. The present invention relates to a wide-area remote monitoring system applied to a computer.

[0002]

2. Description of the Related Art FIG. 4 shows a configuration of a conventional wide area remote monitoring system. In the figure, reference numeral 10 denotes a plant such as a drainage pumping station distributed and installed in a river basin, and reference numeral 20 denotes a centralized monitoring center for monitoring a plurality of plants 10 at one place. Each plant 10
Are the data collection function 11 and the data transmission function 1 respectively.
2 is provided. The centralized monitoring center 20 has a data receiving function 21 and a display function 22 so that data can be sent from each plant 10 to the centralized monitoring center 20 using the public line 30 as a communication line. It has become.

In the wide area monitoring system configured as described above, the operation status of the plant 10 arranged in the wide area can be monitored from the centralized monitoring center 20 via the wide area network. In this case, the instantaneous value data collected at regular intervals by the data collection function 11 is transmitted to the data transmission function 12.
Is sent to the centralized monitoring center 20 using the public line 30 at regular intervals. This data is stored at the central monitoring center 2
0 after being received by the data receiving function 21
2 is displayed on the screen, for example, as a monitoring screen 23 shown in FIG. In the case of the screen display example shown in FIG. 5, the received data 1a, 2a and 1b, 2b are displayed for each of the plant A and the plant B.

[0004]

As described above, in the wide area remote monitoring system according to the prior art, the data transmitted via the public line 30 is simply displayed on the monitoring screen 23 as it is. However, since the public line 30 is not always in a communicable state but is connected every time a communication request is made, data transmission / reception depends on the presence or absence of the line connection and is not necessarily guaranteed. Not in. Therefore, when the values of the data 1a, 2a and 1b, 2b displayed on the monitoring screen 23 do not change, it is conceivable that the values have not been updated because new data is not transmitted. However, even in such a case, the observer has to rely only on the information (data) displayed on the monitoring screen 23, and accordingly, it may not be possible to make an accurate situation determination in some cases. There is concern. Therefore, an object of the present invention is to make it possible for an observer to accurately determine a situation in a wide-area remote monitoring system using a communication line such as a public line.

[0005]

Means for Solving the Problems To solve the above problems, the present invention employs the following means. The distributed remote monitoring system according to claim 1, comprising a data collection function of collecting instantaneous values of various data, and a data transmission function of transmitting data collected by the data collection function at a predetermined cycle. A plurality of plants, a data receiving function for receiving various data transmitted from the data transmitting function, and monitoring whether or not the data receiving function is receiving data at a predetermined cycle. A communication delay monitoring function of outputting an unreliable display when a problem occurs, and a display function of displaying, on a monitoring screen, the data received by the data receiving function and the unreliable display output from the communication delay monitoring function. And a communication line connecting the plant and the centralized monitoring unit.

According to this wide-area remote monitoring system, when new data cannot be received at a predetermined cycle due to a problem in the communication line or the like, the communication delay monitoring function outputs an unreliable display and displays it on the monitoring screen. Therefore, the observer can easily determine whether the displayed data is the latest one.

[0007] According to the wide area remote monitoring system of the second aspect, the unreliable indication is output in a plurality of stages according to the degree of delay in data reception.

[0008] According to this wide area remote monitoring system, a plurality of levels of unreliability are displayed according to the delay time, so that the observer can know the degree of unreliability of the displayed data and take appropriate measures. You can choose.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention. Reference numeral 10 denotes a plant, 20 denotes a centralized monitoring center provided as a monitoring unit, and 30 denotes a public line used as a communication line. Here, the plant 10 will be described as a wide area monitoring system in which a plurality of drainage pump stations are dispersedly arranged in a river basin, and the plurality of plants 10 are monitored by one centralized monitoring center 20. Specific examples of the information (data) to be monitored include process data such as a water level, a flow rate, and a temperature, and on / off signals of a pump and an engine.

In FIG. 1, each plant 10 has a data collection function 11 and a data transmission function 12. The data collection function 11 has a function of collecting preset instantaneous values of various data at regular intervals. Further, the data transmission function 12 has a function of transmitting the instantaneous value data collected by the data collection function 11 at regular intervals to the centralized monitoring center 20 via the public line 30 at regular intervals.

On the other hand, the centralized monitoring center 20 comprises a data receiving function 21, a communication delay monitoring function 24 and a display function 22. The data receiving function 21 has a function of receiving instantaneous value data transmitted at regular intervals from the data transmitting function 12 of each plant 10 via the public line 30. The display function 22 is provided for each plant 10.
In addition to displaying the data sent from the monitoring screen 23, for example, it is also possible to display an unreliable display received from a communication delay monitoring function 24 to be described later on the monitoring screen 23.

The communication delay monitoring function 24
Constantly monitors the presence or absence of data transmission at regular intervals via the public line 30 to the centralized monitoring center 20 and, if a delay occurs in data transmission, displays an unreliable display according to the degree of the delay. It has a function of transmitting to the function 22.

Hereinafter, this function will be specifically described with reference to the flowchart of FIG. The period at which the instantaneous value data is transmitted from each plant 10 to the centralized monitoring center 20 is
Usually, it is set to about several seconds. Therefore, for example, when new data is not transmitted (no data is received on the monitoring side) within 10 seconds after the previous data is received from the plant A among the plants 10, the monitoring screen of FIG. As illustrated in FIG. 23, a yellow # is displayed in front of the data (digital display of parameters) 1a and 1b on the monitoring screen 23 to notify the monitoring personnel that this numerical value is unreliable. This is because the communication time of the public line 30 varies depending on the usage state, so data transmission at the specified cycle cannot be performed, and data reception may be temporarily delayed. This is a display to call attention.

Further, if no new data is transmitted 60 seconds after the previous data is received, a red # is displayed before the data 1a and 1b, and the numerical value digitally displayed is also displayed. Display in red. This is a display for giving a warning to a supervisor because it is conceivable that data transmission and reception may not be possible because the public line 30 is disconnected.

With such a configuration, the monitoring screen 23
Is the latest data within 10 seconds from the reception, more than 10 seconds after reception and less reliable within 60 seconds, or more than 60 seconds after reception Unreliable items that have passed are distinguished by unreliable symbols or colors. For this reason, the observer can determine whether the numerical value currently displayed is reliable or not by the stepwise display of unreliability.
That is, when only the numerical value of the data is displayed on the monitoring screen 23, it can be determined that the data is the latest reliable data received at the designated cycle. In addition, if there is an unreliable display indicating that the value is not updated because no data is received at the designated cycle, the observer can recognize this and take the following countermeasures.

If there is a yellow display #, it is considered that there is a temporary delay in data reception, and the situation will be watched for a while. When the yellow # display changes to the red # display, disconnection of the public line 30 is considered, and it is checked whether or not the communication line is in a communicable state. As a result, if the communication line is disconnected, the communication line is reconnected and the communication is enabled. When an urgent judgment or instruction such as an operation permission or an order is required, a prompt communication with the site by some means is made to try to grasp the situation of the plant 10 accurately. This makes it possible to avoid erroneous operations resulting from erroneous recognition. That is, when the plant 10 is a drainage pumping station, it is possible to correctly recognize the current situation when performing operation permission / instruction such as starting / stopping the pump or opening / closing the water gate, thereby preventing erroneous operation.

In the above description, the indication of unreliability is divided into two stages on the basis of 10 seconds and 60 seconds.
The time and the stage can be appropriately changed, and the symbols and colors of the unreliable display are not limited to the above-described examples. That is, three levels of unreliable display such as 10 seconds, 30 seconds and 60 seconds are performed, and symbols other than #, for example,? And so on, and
A color other than yellow or red may be used, or may be combined with a blinking display or an alarm sound. In addition, the wide-area remote monitoring system of the present invention is applicable not only to a drainage pumping station but also to centralized monitoring of a plurality of plants arranged in a distributed manner such as a pipeline pump station. Need not be a public line.

[0018]

According to the above-described wide-area remote monitoring system of the present invention, when a communication line becomes abnormal or communication is delayed or communication is disabled, unreliable display is performed on the screen display to display data. This makes it possible for the observer to make an accurate judgment on the situation. For this reason, it is possible to prevent an observer from making an erroneous situation determination and performing an erroneous operation or giving an inappropriate instruction, thereby increasing the reliability of the wide area remote monitoring system.

Further, since the unreliable display is displayed at a plurality of stages, the situation can be known more accurately, and appropriate measures can be promptly taken according to the situation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a wide area remote monitoring system according to the present invention.

FIG. 2 is a flowchart relating to a communication delay monitoring function of FIG. 1;

FIG. 3 is a diagram showing a display example of a monitoring screen of the wide area remote monitoring system according to FIG. 1;

FIG. 4 is a block diagram showing a conventional wide area remote monitoring system.

FIG. 5 is a diagram showing a display example of a conventional monitoring screen.

[Explanation of symbols]

 Reference Signs List 10 Plant 11 Data collection function 12 Data transmission function 20 Centralized monitoring center 21 Data reception function 22 Display function 24 Communication delay monitoring function 30 Public line

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification code FI // G05B 11/18 G05B 11/18 D (72) Inventor Shinichiro Hori 2-1-1 Shinama, Araimachi Takasago-shi, Hyogo Mitsubishi Heavy Industries Inside the Takasago Laboratory Co., Ltd. (72) Inventor Yoshinori Kaima 2-1-1, Shinhama, Arai-machi, Takasago-shi, Hyogo Prefecture Inside the Takasago Machinery Works, Mitsubishi Heavy Industries, Ltd.

Claims (2)

[Claims] 1. A plurality of distributed plants comprising: a data collection function for collecting instantaneous values of various data; and a data transmission function for transmitting data collected by the data collection function at a predetermined cycle. A data reception function for receiving various data transmitted from the data transmission function, and monitoring whether or not the data reception function is receiving data at a predetermined cycle. A centralized monitoring unit including a communication delay monitoring function of outputting a display, and a display function of displaying, on a monitoring screen, data received by the data receiving function and an unreliable display output from the communication delay monitoring function; A wide area remote monitoring system comprising: a communication line connecting between a plant and the centralized monitoring unit. 2. The wide-area remote monitoring system according to claim 1, wherein said unreliable indication is output in a plurality of stages according to the degree of delay in data reception.