JP2022187071A - Monitoring system - Google Patents

Abstract

To solve the problem that it is necessary to transmit a recorded log file to a log collection server via a dedicated line when the recorded log file exceeds a use capacity of a hard disk.SOLUTION: Binarized log data in which detection values detected by a plurality of detection apparatuses and the detection states are recorded is accumulated, and the accumulated log data is extracted at regular interval times and transmitted through a public network by e-mail. The binarized log data is configured by log types and log contents, and data packets to be transmitted include priority information based on the log types.SELECTED DRAWING: Figure 1

Description

The present application relates to surveillance systems.

The monitoring system classifies daily log files by type and records them in order of acquisition together with date and time information. A technology is known in which when a recorded log file exceeds the available capacity of a hard disk, it is transferred to a log collection server, and the log file in the hard disk is deleted after transfer (see, for example, Patent Document 1).

JP 2006-221439 A

However, in Patent Document 1, transfer from the hard disk in the firewall to the log collection server is performed through a dedicated network line, and all log files from the previous day to the previous n days are sent to the log collection server at one time. ing. Such past log file accumulation methods have the following problems.
(1) It is necessary to construct a dedicated network for connection with the log collection server.
(2) If it is desired to collect logs with high monitoring priority for n days or more, it is necessary to access both the hard disk inside the firewall and the log collection server.
(3) In recent years, monitor workers are working from home, etc., and there is a demand for quick access to necessary log information from home.

SUMMARY OF THE INVENTION The present application has been made to solve the problems described above, and aims to provide a monitoring system that does not require a dedicated network line and allows easy access to necessary log information.

The monitoring system disclosed in the present application accumulates a plurality of detection devices, binarized log data that records the detection state together with the detection values detected by the plurality of detection devices, and stores the accumulated binarized log Equipped with a gateway device that extracts data at regular intervals and creates data packets for e-mails to be sent to the data center via a public network. The binarized log data consists of log type and log content. and the data packet includes priority information based on the log type.

According to the monitoring system disclosed in the present application, the binarized log data and priority are sent by e-mail via a public network, so a dedicated network line is not required, and access to necessary log information is possible. is easy.

1 is a configuration conceptual diagram of a monitoring system according to Embodiment 1; FIG. 4 is a diagram for explaining the configuration of sensor data according to Embodiment 1; FIG. 4 is a diagram showing the structure of a data packet transmitted to the gateway device according to Embodiment 1; FIG. FIG. 10 is a diagram illustrating a conversion table for converting a log type ID in a data packet into text data; FIG. 4 is a diagram illustrating a conversion table for converting a log content ID in a data packet into text data; 4 is a diagram for explaining the configuration of data accumulated in a gateway device; FIG. FIG. 4 is a diagram showing the configuration of log data extracted within the gateway device; FIG. 4 is a diagram for explaining the configuration of a log data mail; FIG. FIG. 10 is a diagram for explaining the difference in transmission capacity between when log data is binarized and sent by e-mail and when text data is sent by e-mail; It is a figure explaining an example of the hardware constitutions of the microcomputer mounted in the power receiving/distribution equipment, the gateway apparatus, the data center, and each terminal.

Preferred embodiments of a monitoring system according to the present application will be described below with reference to the drawings. The same reference numerals are assigned to the same contents and corresponding parts, and detailed description thereof will be omitted.

Embodiment 1.
FIG. 1 is a configuration conceptual diagram including functional blocks of a monitoring system 100 according to Embodiment 1. As shown in FIG. In the figure, power receiving and distributing facilities A1, A2, B1, and B2 are monitored objects, and various sensors (sensor 1, sensor 2, etc.) such as current sensors, voltage sensors, and vibration sensors are connected to each facility to monitor the status of the facility. Real time monitoring. Based on the signal values detected by various sensors, if an abnormal value is detected, necessary processing such as current interruption by a protection relay is performed in each of the power receiving and distributing facilities A1, A2, B1 and B2. The power receiving/distributing facilities A1 and A2 are arranged within the same area AA, and the power receiving/distributing facilities B1 and B2 are arranged within the same area BB. In addition, in FIG. 1, there are four power receiving and distributing facilities, but the present invention is not limited to this.

The gateway devices A and B have power receiving/distributing facility interface units 10A and 10B that transmit and receive with the power receiving/distributing facilities A1, A2, B1, and B2, and a log for extracting log data from the data received by the power receiving/distributing facility interfaces 10A and 10B. Data extraction units 11A and 11B and mail transmission units 12A and 12B for transmitting the extracted log data to the mail server 20 are provided. In addition, in FIG. 1, there are two power receiving/distributing facilities connected to one gateway device, but the present invention is not limited to this.

The mail server 20 is connected to a public network 30 such as the Internet, and includes a data center 40, a power receiving/distribution facility administrator terminal 50, a maintenance company terminal 60, and a designer terminal 70 (this In the embodiment, the log data is transmitted to the mobile terminal).

In the data center 40 , the log data received by the mail receiving section 43 is decoded by the communication content decoding section 42 and processed by the upper log processing section 41 . Similarly, the log data received by the power receiving/distribution facility administrator terminal 50, the maintenance company terminal 60, and the designer's portable terminal 70 are displayed on each terminal.

Next, the operation of the monitoring system 100 configured in this manner will be described in detail. Since the power receiving/distributing facilities A1 and A2 and the gateway device A installed in the same area AA have the same functions as the power receiving/distributing facilities B1 and B2 and the gateway device B placed in the same area BB, The description will be given with respect to the facilities in area AA (power receiving/distributing facilities A1 and A2, gateway device A).

The sensor data detected by the sensors 1 to N in the power receiving/distributing facility A1 are stored in packets and stored in the gateway device A via the power receiving/distributing facility interface section 10A.

FIG. 2 shows detection data of the sensor 1 in the power receiving/distribution facility A1, for example, and FIG. Each packet stores data such as the detection date and time of the sensor, the sensor ID that identifies the sensor, the signal type, the signal number, the signal value, the log type ID, and the log content ID. Although one piece of log data is recorded in one piece of detection data in this embodiment, the present invention is not limited to this.

Also, if there is no log to be recorded, no valid bit information is written in that part. For convenience of explanation, the data contents of FIGS. 2 and 3 are displayed as text data except for the log type ID and the log content ID, but they are all transmitted and received as binary data.

The power receiving/distribution facility A1 and the gateway device A are connected by a dedicated line, and if the communication capacity is not severely limited, several bytes of log information are added to the detection data of the sensor 1, and the log information is sent to the gateway device A. may be analyzed to create a log type ID and a log content ID.

The log type ID and the log content ID in FIGS. 2 and 3 represent the log type and the log content with 4-bit binary data, respectively. FIG. 4 shows a conversion table for converting a 4-bit log type ID into text data. According to the arrangement of the 4 bits, the logs are classified into five types: set value change log, power operation log, error occurrence log, screen transition log, and time change log, but the present invention is not limited to this. The log type is indicated as a priority that is prioritized according to the importance of the log. The gateway device A makes a decision according to the priority.

In other words, among these log types, setting value change logs and error occurrence logs are logs with a high degree of urgency in reporting system abnormalities, and are worth reporting more than other logs, so they are given a higher priority. doing. Here, the setting value change log is recorded when the threshold value of the sensor in the power receiving/distribution facility A1 is changed. Also, the power operation log is a record of the ON/OFF operation of the sensor.

On the other hand, the screen transition log and the time change log have low urgency and low priority. Here, the screen transition log records the switching status of the selection screen displayed on the sensor, and the time change log is recorded when the time is changed. Similarly, FIG. 5 shows an example of a log content ID conversion table. A plurality of 4-bit log content IDs are set for each log type ID, and each log content is defined. That is, the contents of error, change status of setting values, screen texture status, time change status, and the like. Note that the log type ID and log content ID are not limited to 4 bits, and the number of bits may be changed according to the log type and the size of the log content.

Data is sequentially transmitted in packets from the power receiving/distribution facility A1 to the gateway device A, and signal values and log data of N sensors are accumulated for each sensor date and time, as shown in FIG. In FIG. 6, the latest data is transmitted every minute and stored in the gateway device A. In FIG. Data is transmitted from the power receiving/distributing facility A2 as well as the power receiving/distributing facility A1. Below, it demonstrates mainly between the gateway apparatus A and power receiving/distributing equipment A1.

The log data extraction unit 11A extracts the log data of the log type ID and the log content ID from the accumulated data as shown in FIG.

The extracted log data is read out at regular time intervals, written into mail by the mail transmitting unit 12A, and a log data mail packet (hereinafter referred to as log data mail) is created. In principle, one piece of log data is written in one e-mail, and each log data is sent by e-mail. However, two or more related logs with high priority may be sent in one mail. Also, a plurality of low-priority logs may be sent together.

When writing the log data into the mail, the log type ID in FIG. 4 is identified and the priority is written. Depending on this priority, the destination of the mail and the order of transmission are determined. The destination of the log data mail to which the log type ID of low priority is added is only the data center 40, but the destination of the log data mail to which the log type ID of high priority is added is only the data center 40. Instead, the destination of the power receiving/distribution facility manager terminal 50, the maintenance company terminal 60, or the designer's portable terminal 70 is also added.

Log data mails with high priority are sent before log data mails with low priority. For example, log data mail with high priority is sent with a delay of only the processing time of the processor in gateway device A after it is received by gateway device A, but log data mail with low priority is sent by the communication line In order to avoid pressure, the data may be transmitted to the data center 40 sequentially after 17:00 or late at night when the public network 30 is relatively unoccupied.

Examples of log data mail packet configurations are shown in FIGS. FIG. 8(a) shows the configuration of the log data mail when transferring the set value change log, and FIG. 8(b) shows the configuration of the log data mail when transferring the error occurrence log. A log type ID of 4 bits, a priority of 2 bits, a sensor date and time of 64 bits, a sensor ID of 4 bits, and a log content ID of 4 bits are written as binary data. Since the setting value change log and the error occurrence log have high priority, the destination of the mail is assumed to be the data center 40, the power receiving/distribution facility manager terminal 50, the maintenance company terminal 60, and the designer's portable terminal . The 2-bit priority data is indicated by binary representation shown in FIG. 4, for example.

On the other hand, in the case of the power supply operation log in FIG. 8C, since the priority of the log is medium, the destination of the mail is the data center 40 and the power receiving/distribution equipment manager terminal 50, and the In the case of the power operation log, since the priority is low, only the data center 40 is the destination.

The log data mail with the destination set is encrypted by the mail management unit 21 using a high-security mail transmission protocol (SMTPS, S/MIME, etc.), and sent via a public network 30 such as the Internet. It is sent to the center 40, the terminal 50 of the power receiving and distributing facility manager, the terminal 60 of the maintenance company, and the portable terminal 70 of the designer. The transmitted log data is deleted from the accumulated data of the gateway device A. Also, if necessary, the transmission capacity may be further reduced by data compression.

The sent log data mail is received by the mail receiving unit 43 of the destination data center 40 . In the received log data mail, the communication content decoding unit 42 converts the binary log data written in the mail into text data. The converted data is accumulated by the upper log processing unit 41 for each date and for each power receiving/distribution facility. Alternatively, the logs may be sorted and arranged according to the log type ID and the log content ID. These organized log data are stored in a storage device such as a hard disk.

The data center 40 may be constructed by cloud computing, so that it is not limited to collecting log data in a narrow area, but sending log data in more areas by e-mail and accumulating it in the cloud. , it is possible to analyze the trend of log data for each similar power receiving and distributing facility installed in each region. This makes it easy to use log data of power receiving and distributing facilities in each region having the same facility for analysis of an error occurrence log generated in one power receiving and distributing facility.

The log data mail sent to the terminal 50 of the power receiving/distribution facility manager, the terminal 60 of the maintenance company, and the mobile terminal 70 of the designer is received by each of the transmitting/receiving units 53, 63, and 73, and analyzed by preinstalled analysis software. Binary log data is converted into text data by analysis units 52 , 62 , 72 , and displayed on display units 51 , 61 , 71 . As a result, after a high-priority log is generated, the content of the log can be checked directly by the maintenance company or the designer within a certain period of time, so signs of abnormalities in the monitoring system can be analyzed in advance or immediately after the accident. becomes possible.

In addition, it is also possible for the power receiving/distribution facility manager to directly access the data center 40 and analyze the organized series of log data, triggered by the reception of a log data mail with a high priority. Furthermore, by using the above-described cloud computing, it is possible to access past logs of power receiving and distributing facilities in various regions accumulated in the data center 40, and other receivers who have received similar logs. It will also be possible to investigate the history of distribution equipment and quickly find a solution.

In addition, in the gateway device A, the short-term log analysis data for one to several days is converted into text data in the same manner as in the data center 40 described above, and the log data organized according to the log type and log content is generated. The power receiving/distribution facility manager who received the accumulated log data mail with high priority may directly examine the sensor signal related to the received log in the gateway device A.

Next, the difference in transmission capacity between the case of sending e-mail with log data in a binarized state and the case of sending e-mail with text data will be described. Prerequisites are as follows.
(1) If there is no binarization, the log type and log contents are expressed in double-byte characters.
(2) Full-width characters are represented by 16 bits per character.
(3) Secure 10 characters for the log type and 200 characters for the log content.
(4) Date and time, sensor ID, log type ID, and log content ID are represented by 64 bits, 4 bits, 4 bits, and 4 bits, respectively.

In this case, as shown in FIG. 9, the transmission capacity without binarization is 428.5 bytes per log data, and with binarization, it is 9.5 bytes. As a result, the transmission capacity that can be reduced per log data is 419 bytes. Assuming that the number of logs per day per sensor in the power receiving/distribution facility A1 is 100, the number of sensors sending logs to the gateway device A is 100, and the number of gateway devices connected to the data center 40 is 10, the number of gateway devices connected to the data center 40 is 10. It is possible to eliminate the pressure on the communication band for about 40 MB per. Therefore, it is not necessary to lay a dedicated line for transferring the log data, and transmission via the public network 30 is possible.

A microcomputer is installed in the power receiving/distributing facility A1, the gateway device A, the data center 40, and the respective terminals 50-70. An example of the hardware of the microcomputer is shown in FIG. It comprises a processor 200 and a storage device 300. Although not shown, the storage device comprises a volatile storage device such as a random access memory and a non-volatile auxiliary storage device such as a flash memory. Also, an auxiliary storage device such as a hard disk may be provided instead of the flash memory. The processor 200 performs each control described above by executing a program input from the storage device 300 . For example, the gateway device A receives data from the power receiving/distributing facility A1, extracts log data, and creates an e-mail. The data center 40 receives, decodes, and transmits the log data mail. Each terminal receives, analyzes, and displays e-mails. In this case, the program is input from the auxiliary storage device to the processor 200 via the volatile storage device. Further, the processor 200 may output data such as calculation results to the volatile storage device of the storage device 300, or may store the data in the auxiliary storage device via the volatile storage device.

As described above, the log data of the sensor detection of the power receiving/distribution equipment is written in an e-mail in a binarized state and transmitted to the destination according to the importance of the log via the public network, thereby providing the following effects.
(1) Since the log data is transmitted from the lower-level gateway device to the upper-level data center at regular intervals and is accumulated, the hard disk of the lower-level device does not exceed the capacity of the log data. Therefore, it is not necessary to lay a dedicated line that maintains a certain level of security from the gateway device to the data center.
(2) Since high-priority logs can be sent by e-mail to relevant parties without delay, the received logs can be read without restrictions on time and place. Also, by accumulating the received log in the terminal for a certain period of time, it is possible to monitor the power receiving and distributing facility in which the log occurred without accessing the data center. Furthermore, by accessing the data center triggered by the receipt of the log data mail with high priority by the terminals of the parties concerned, there is also the advantage that the logs arranged in the data center can be immediately analyzed.
(3) Since the log data is transmitted and received as binary data, it is possible to avoid strain on the communication line.

Although the present application has described exemplary embodiments, the various features, aspects, and functions described in the embodiments are not limited to application of particular embodiments, alone or Various combinations are applicable to the embodiments.
Accordingly, numerous variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, the modification, addition, or omission of at least one component shall be included.

1, 2: Sensor, 20: Mail Server, 30: Public Network, 40: Data Center, 50: Power Receiving and Distribution Equipment Manager Terminal, 60: Maintenance Company Terminal, 70: Designer Terminal, 100: Monitoring System, A1, A2 , B1, B2: power receiving and distribution equipment, A, B: gateway devices.

Claims (4)

A plurality of detection devices, and binarized log data recording detection states together with detection values detected by the plurality of detection devices are accumulated, and the accumulated binarized log data is extracted at regular time intervals. and a gateway device for creating a data packet for an e-mail to be sent to the data center via a public network, wherein the binarized log data is composed of a log type and log content, and the data packet is , a monitoring system comprising priority information based on the log type. The priority is ranked in descending order of urgency, and data packets having log types ranked higher are sent not only to the data center but also to the administrator who manages the facilities detected by the detection device. 2. The surveillance system of claim 1, wherein the system is transmitted. 3. The priority is ranked in descending order of urgency, and a data packet having a log type with a high urgency is transmitted before a data packet with a low urgency. The surveillance system described in . 3. The monitoring system according to claim 2, wherein the binarized log data of said data packet received by said administrator is converted into text data and displayed.

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