JP4994438B2 - Monitoring device and monitoring system - Google Patents

Description

  The present invention relates to a monitoring device and a monitoring system for monitoring a monitored device in a communication system, for example.

  The communication system includes a monitoring device for grasping the communication quality of each device, the failure status of each device on the network, and setting and controlling the communication system. Since the communication system is arranged in a wide area, the monitoring device is often a remote monitoring device installed away from the installation location of each device in the communication system. Therefore, the monitoring device is connected to each communication device that is actually communicating by a public line or a dedicated line, and a device called a gateway is provided between the monitoring device and each communication device. The gateway aggregates information such as communication quality and failure status collected by each communication device in the network and transmits it to the monitoring device. A control command from the monitoring device is transmitted to each device to be controlled via the gateway.

In order to improve the reliability of the entire communication system, it is necessary for the monitoring apparatus to collect information in the communication system without omission. For example, Patent Document 1 discloses a configuration that prevents a distributed message from being lost, although it is different from a communication system.
According to Patent Document 1, the receiving device (monitoring device) is configured to be duplicated with two receiving means. The receiving device receives a message with a serial number distributed from the distribution source and checks the serial number of the message received by one receiving means, and if a missing message is detected, the other receiving means requests the missing message Complementing and recovering the message prevents the loss of the message.

JP 2002-204283 A

  However, when the above-described conventional configuration is adopted for the monitoring device, for example, when the line is disconnected and communication between the gateway and the monitoring device is interrupted, the monitoring device can receive a message in any of the duplex receiving means. Cannot be complemented with each other. As a result, there is a problem that information in the communication system cannot be collected without omission and reliability as a communication system is lowered.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a monitoring apparatus and a monitoring system that collect information without omission and improve the reliability as a communication system.

According to the present invention the monitoring device is connected via a plurality of monitored devices and the independent circuit on the network, receiving a message broadcast to each line of a plurality of the monitored device, it searches the database for later If the message received earlier is stored, the communication unit that discards the message received later, the database that stores the message received earlier by the communication unit, and the control based on the message received earlier by the communication unit A control unit that transmits a signal through a line that has received the electronic message and monitors an event that has occurred on the network.

According to the monitoring apparatus according to the present invention, are connected via a plurality of monitored devices and the independent circuit on the network, receiving a message broadcast to each line of a plurality of the monitored device, it searches the database If the message received earlier is stored, the communication unit that discards the message received later, the database that stores the message received earlier by the communication unit, and the control based on the message received earlier by the communication unit signals are transmitted through a line that has received the message, since the events occurring on the network and configured to so that a control unit for monitoring an abnormality occurs becomes unable to communicate with the one line In this case, the other line can receive the message without omission. As a result, information can be collected without omission and the reliability of the communication system can be improved.

It is a figure which shows the whole structure of the monitoring system by Embodiment 1 of this invention. It is a figure which shows the structure of the monitoring apparatus by Embodiment 1 of this invention. It is a figure which shows the whole structure of the monitoring system by Embodiment 2 of this invention. It is a figure which shows the structure of the monitoring apparatus by Embodiment 2 of this invention. It is a figure which shows the whole structure of the monitoring system by Embodiment 3 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
As shown in FIG. 1, the monitoring system 1 includes a monitoring device 10, a communication network 20, and lines 31 and 32. Between the monitoring device 10 and the communication network 20, a line 31 and a line 32 are independent. The lines connecting the monitoring device 10 and the communication network 20 are duplicated and connected. In other words, the monitoring system 1 has a redundant configuration with the line 31 and the line 32 which are independent in parallel.

  The communication network 20 is a ring communication system in which communication devices (monitored devices) 21 and 21 ′ are connected by a network 25. The communication device 21 has a gateway function for performing data communication between the communication network 20 and the monitoring device 10 via the line 31 or 32, and an event that has occurred on the communication network 20 from all the communication devices 21 ′. The information is collected and converted into a telegram, and a serial number is assigned to the telegram. The broadcast telegram is transmitted to the monitoring apparatus 10 via the independent lines 31 and 32. Here, a ring type communication system is shown as an example of the communication network 20, but the communication device 21 may be configured to collect information from all the communication devices 21 'connected by the network 25. .

  The monitoring device 10 is connected to the communication network 20 by connecting to the communication device 21 via the line 31 or 32, and broadcasts from the communication device 21 for each of the lines 31 and 32 via independent lines 31 and 32. Receive the message. The monitoring device 10 receives the broadcast message transmitted from the communication device 21 and registers it as a message with a serial number. Further, the monitoring device 10 is configured to monitor an event that has occurred on the communication network 20 based on the received electronic message, and to generate a control signal to perform control on the communication network 20.

  Next, the configuration of the monitoring device 10 will be described. As shown in FIG. 2, the monitoring apparatus 10 includes a communication unit 101, a database 102, and a control unit 103, and the communication unit 101 includes a message reception unit 101a and a transmission unit 101b.

  The communication unit 101 is duplexed and connected to the communication device 21 shown in FIG. 1 via the at least two independent lines 31 and 32 to communicate with the monitoring device 10. A communication function with the device 21 is provided.

  The message receiving unit 101a receives a broadcast message for each of the lines 31 and 32 from the communication device 21 shown in FIG. 1 described above, searches the database 102 using the serial number of the received broadcast message as a unique key, and searches the destination. It is determined whether or not the received message is stored. When the same serial number is registered in the database 102, the electronic message receiving unit 101a determines that the previously received electronic message is stored and is configured to discard the electronic message received later. If the message is not registered, it is determined that the message has not been received first, and the message number and the message corresponding to the message number are output to the database 102 and the message is output to the control unit 103.

  The database 102 functions as a storage unit that stores a message input from the message receiving unit 101a as a previously received message together with a serial number. The control unit 103 monitors an event that has occurred on the network 25 of the communication network 20 based on the message input from the message reception unit 101a, and processes the message input from the message reception unit 101a to generate an event on the network 25. A control signal for performing a control process corresponding to is generated.

Next, operations of the monitoring system 1 and the monitoring device 10 will be described.
For example, when an event to be transmitted to the monitoring device 10 occurs in the communication device 21 ′ on the network 25 of the communication network 20, the communication device 21 ′ transmits information on the generated event to the communication device 21. The communication device 21 collects information about the event that has occurred from the communication device 21 ′, converts it into a message, and gives a serial number to the message. The communication device 21 sends a message with the same serial number to each of the lines 31 and 32 as a broadcast message.

  When the message receiving unit 101a of the communication unit 101 of the monitoring device 10 receives a message with a serial number from the communication device 21 via the line 31, it searches the database 102 using the serial number of the received message as a key. When the same serial number is not registered in the database 102, the electronic message receiving unit 101a determines that the electronic message has not been received first, and outputs the serial number and the electronic message corresponding to the serial number to the database 102. The message receiving unit 101 a continuously outputs a message to the control unit 103.

  The database 102 records the serial number input from the telegram receiving unit 101a and the telegram corresponding to the serial number as the previously received telegram. The control unit 103 performs processing based on the telegram input from the telegram receiving unit 101a to monitor an event occurring on the network 25, performs processing based on the telegram, generates a control signal, and generates the generated control signal. The data is output to the transmission unit 101b of the communication unit 101. The transmission unit 101 b transmits the control signal input from the control unit 103 to the communication device 21 as a gateway of the communication network 20 via the line 31 or the line 32.

  Subsequently, when receiving a message with a serial number from the communication device 21 via the line 32, the message reception unit 101a of the communication unit 101 searches the database 102 using the received message number as a key. When the same serial number is registered in the database 102, the message receiving unit 101a determines that the message is registered first and discards the received message.

  When the communication device 21 receives the control signal from the monitoring device 10 via the line 31, the communication device 21 converts the data into a data format that can be recognized by the communication devices 21, 21 ′ by the gateway function, and the communication device 21 ′ that is the transmission source of the information related to the event. Send a control command to When receiving the control command from the communication device 21, the communication device 21 ′ performs control processing for recovering from the problematic event according to the control command.

  Here, a case has been described where a message from the communication device 21 via the line 31 arrives first, but when a message from the communication device 21 via the line 32 arrives first, the line 32 from the communication device 21 is changed. The transmitted message is registered in the database 102 and output to the control unit 103, and the message transmitted from the communication device 21 via the line 31 is discarded. The control unit 103 generates and outputs a control signal based on the input message, and the transmission unit 101b transmits the control signal to the communication device 21 via the line 32 or the line 31.

  Here, when an abnormality occurs in the line 31 and the communication between the monitoring apparatus 10 and the communication apparatus 21 is interrupted, the monitoring apparatus 10 causes the message receiving unit 101a to send a message with a serial number from the communication apparatus 21 via the line 32. Receive. In addition, when an abnormality occurs in the line 32 and the communication between the monitoring apparatus 10 and the communication apparatus 21 is interrupted, the monitoring apparatus 10 receives a message with a serial number from the communication apparatus 21 via the line 31. To do. As a result, the monitoring device 10 can receive the message without omission and can continue the process of controlling the communication devices 21 and 21 ′ based on the message.

  As described above, according to the first embodiment of the present invention, the independent line 31 and line 32 are provided between the telegram receiving unit 101a of the monitoring apparatus 10 and the communication apparatus 21 as the gateway of the communication network 20, The message receiving unit 101a of the monitoring device 10 is connected to the communication device 21 via the line 31 and also connected to the communication device 21 via the line 32. The message receiving unit 101a receives the broadcast message and registers it in the database 102. A message with a serial number that is not yet output is output, the database 102 registers the serial number and message input from the message receiving unit 101a, and the control unit 103 monitors and controls the message based on the message registered in the database 102. A signal is generated and output, and the transmission unit 101b is configured to transmit the control signal input from the control unit 103 to the communication device 21. In can also be performed complements message each other when the abnormality in the line 31 or line 32 is interrupted communication occurs, collected without omission information within a communication system. As a result, the reliability of the entire communication system can be improved.

  Moreover, according to Embodiment 1, since the message | telegram receiving part 101a of the monitoring apparatus 10 is connected with the communication apparatus 21 via the at least 2 parallel line | wires 31 and 32, two or more monitoring apparatuses are installed. And redundant monitoring can be realized. As a result, space saving of the device can be realized.

Embodiment 2. FIG.
In the first embodiment, the configuration in which the line between the monitoring device 10 and the communication device 21 is made redundant has been described. However, the second embodiment has a configuration in which a plurality of monitoring devices in the first embodiment are provided and made redundant. Will be described with reference to FIGS. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 3, the monitoring system 1 includes monitoring devices 11 and 12, a communication network 20, and lines 33, 34, 35, and 36. Independent lines 33 and 34 are provided in parallel between the monitoring device 11 and the communication network 20, and independent lines 35 and 36 are provided in parallel between the monitoring device 12 and the communication network 20. It has been. The monitoring system 1 is made redundant with the lines 33, 34, 35, and 36 and made redundant with the monitoring device 11 and the monitoring device 12.

  The communication network 20 is a ring communication system in which communication devices (monitored devices) 21 and 21 ′ are connected by a network 25. The communication device 21 performs data communication between the communication network 20 and the monitoring device 11 via the line 33 or 34, and performs data communication between the communication network 20 and the monitoring device 12 via the line 35 or 36. It has a gateway function to perform, collects information from each communication device 21 ′ connected to the network 25, converts it into a telegram, assigns a serial number to the telegram, and transmits a telegram with a serial number to the monitoring devices 11, 12. Send. In addition, although the structure provided with the monitoring apparatus 11 and 12 is shown here, you may make it the structure provided with two or more at least 2 units | sets.

  The monitoring device 11 is connected to the communication device 21 via an independent line 33 or 34 and receives a broadcast message transmitted from the communication device 21 for each of the lines 33 and 34 via the lines 33 and 34. To do. The monitoring device 11 receives the broadcast message transmitted from the communication device 21 and registers the previously received message. In addition, the monitoring device 11 is configured to monitor an event that has occurred on the communication network 20 based on the received electronic message, and to generate a control signal to perform control on the communication network 20.

  The monitoring device 12 is connected to the communication device 21 via an independent line 35 or 36, and receives a broadcast message transmitted from the communication device 21 for each of the lines 35 and 36 via the lines 35 and 36. To do. The monitoring device 12 receives the broadcast message transmitted from the communication device 21 and registers the previously received message. The monitoring device 12 is configured to monitor an event that has occurred on the communication network 20 based on the received electronic message, and to generate a control signal to perform control on the communication network 20.

  The configuration of the monitoring devices 11 and 12 is the same as that shown in FIG. 2 described in the first embodiment, and includes a communication unit 101, a database 102, and a control unit 103 as shown in FIG. 4. The communication unit 101 receives a message. It consists of a unit 101a and a transmission unit 101b. The message receiving unit 101a of the monitoring device 11 is connected to the communication device 21 shown in FIG. 3 through independent lines 33 and 34, and the message receiving unit 101a of the monitoring device 12 is connected to independent lines 35 and 36, respectively. Is connected to the communication device 21 shown in FIG.

Next, operations of the monitoring system 1 and the monitoring devices 11 and 12 will be described.
For example, when an event to be transmitted to the monitoring device 10 occurs in the communication device 21 ′ on the communication network 20, the communication device 21 ′ transmits information on the generated event to the communication device 21. The communication device 21 collects information about the event that has occurred from the communication device 21 ′, converts it into a message, and gives a serial number to the message. The communication device 21 sends a message with the same serial number to each of the lines 33, 34, 35, and 36 as a broadcast message.

  The monitoring device 11 receives the broadcast telegram from the communication device 21 via the independent lines 33 and 34, and the monitoring device 12 receives the broadcast telegram from the communication device 21 via the independent lines 35 and 36. Receive. Each of the monitoring device 11 and the monitoring device 12 operates in the same manner as the monitoring device 10 according to the first embodiment described above, and stores the previously received message in the database 102. In addition, the monitoring device 11 and the monitoring device 12 each perform processing based on the previously received message and generate a control signal. The monitoring device 11 transmits a control signal to the communication device 21 via the line 33 or 34, and the monitoring device 12 transmits a control signal to the communication device 21 via the line 35 or 36.

  When the communication device 21 receives the control signal from the monitoring device 11 or the monitoring device 12, the communication device 21 converts the previously received control signal into a data format that can be recognized by the communication devices 21 and 21 ′, and the communication of the transmission source of the information related to the event A control command is transmitted to the device 21 ′. When receiving the control command from the communication device 21, the communication device 21 ′ performs control processing according to the control command.

  Here, when an abnormality occurs in the lines 33 and 34 and communication between the monitoring apparatus 11 and the communication apparatus 21 is interrupted, the monitoring apparatus 12 receives a message from the communication apparatus 21 via the line 35 or the line 36. . When the communication between the monitoring device 12 and the communication device 21 is interrupted due to an abnormality in the lines 35 and 36, the monitoring device 11 receives a message from the communication device 21 via the line 33 or 34. In addition, when an abnormality occurs in the monitoring device 11 or the monitoring device 12, an electronic message can be received from the communication device 21 by either the monitoring device 11 or 12. As a result, the monitoring system 1 having the monitoring device 11 and the monitoring device 12 can receive the message without omission and can continue the process of controlling the communication devices 21 and 21 ′ based on the message.

  As described above, according to the second embodiment of the present invention, the line 33 and the line 34 are provided between the telegram receiving unit 101a of the monitoring apparatus 11 and the communication apparatus 21 as the gateway of the communication network 20, and the monitoring apparatus 12 Since the line 35 and the line 36 are provided between the telegram receiving unit 101a of the communication network 21 and the communication device 21 as the gateway of the communication network 20, even if communication is interrupted on the lines 33 and 34 or the lines 35 and 36, the message The information in the communication system can be collected without omission. As a result, the reliability of the entire communication system can be further improved.

Embodiment 3 FIG.
In the first embodiment, the configuration in which the line 31 and the line 32 are provided between the monitoring apparatus 10 and the communication apparatus 21 as the gateway to make the line redundant has been described. However, in the third embodiment, the monitoring apparatus 10 is made redundant. A configuration for connecting to a plurality of communication apparatuses via the connected line will be described with reference to FIG. In addition, the same code | symbol is attached | subjected about the structure similar to Embodiment 1, and the detailed description is abbreviate | omitted.

  As shown in FIG. 5, the monitoring system 1 includes a monitoring device 10, a communication network 20, and lines 37 and 38. The communication network 20 includes communication devices (monitored devices) 21, 21 ′, and 22 via a network 25. It is a connected ring type communication system. The configuration of the monitoring device 10 is the same as that of the monitoring device 10 of the first embodiment described above.

  The communication device 21 and the communication device 22 function as a gateway for the communication network 20. The communication device 21 collects information from all the communication devices 21 ′ connected to the network 25, converts the information into a telegram, assigns a serial number to the telegram, and transmits the telegram with the serial number to the monitoring device 10 via the line 37. Send. The communication device 22 collects information from all the communication devices 21 ′ connected to the network 25, converts the information into a telegram, assigns a serial number to the telegram, and transmits the telegram with the serial number to the monitoring device 10 via the line 38. Send. That is, the communication devices 21 and 22 are configured to transmit a broadcast telegram to the monitoring device 10.

  The monitoring device 10 and the communication device 21 of the communication network 20 are connected by a line 37, and the monitoring device 10 and the communication device 22 of the communication network 20 are connected by a line 38. That is, the monitoring system 1 is made redundant by communication devices 21 and 22 as gateways of the communication network 20.

Next, operations of the monitoring system 1 and the monitoring device 10 according to the third embodiment will be described.
For example, when an event to be transmitted to the monitoring device 10 occurs in the communication device 21 ′ on the communication network 20, the communication device 21 ′ transmits information about the generated event to the communication device 21 and the communication device 22.

  The communication device 21 collects information about the event that has occurred from the communication device 21 ′, converts it into a message, and gives a serial number to the message. The communication device 21 sends a message with a serial number to the monitoring device 10 via the line 37 as a message with a number. The communication device 22 collects information about the event that has occurred from the communication device 21 ′, converts it into a message, and assigns the same serial number assigned by the communication device 21 to the message. The communication device 22 sends a message with the same serial number as a message with a serial number to the monitoring device 10 via the line 38.

The monitoring device 10 receives a message with a serial number from the communication device 21 via the line 37 and receives a message with the same serial number from the communication device 22 via the line 38. That is, the monitoring device 10 receives the broadcast telegram from the communication devices 21 and 22 via the lines 37 and 38.
The monitoring device 10 operates in the same manner as the monitoring device 10 according to the first embodiment described above, registers the previously received electronic message with the serial number in the database 102 and outputs it to the control unit 103. The control unit 103 is based on the electronic message. Output a control signal. When the monitoring device 10 receives a message received via the line 37 before the message received via the line 38, the transmission unit 101b of the monitoring device 10 transmits a control signal to the communication device 21 via the line 37. To do. When the monitoring device 10 receives the message received via the line 38 before the message received via the line 37, the transmission unit 101b of the monitoring device 10 sends a control signal to the communication device 22 via the line 38. Send.

  Here, when an abnormality occurs on the line 37 and communication between the monitoring apparatus 10 and the communication apparatus 21 is interrupted, the monitoring apparatus 10 receives a message from the communication apparatus 22 via the line 38. When communication between the monitoring device 10 and the communication device 22 is interrupted due to an abnormality in the line 38, the monitoring device 10 receives a message from the communication device 21 via the line 37. The monitoring device 10 can also receive a message from one of the communication devices 21 and 22 even when communication is interrupted due to an abnormality in the communication device 21 or the communication device 22 as a gateway. As a result, the monitoring device 10 can receive the message without omission and can continue the process of controlling the communication devices 21, 21 ′, 22 based on the message.

  As described above, according to the third embodiment of the present invention, the line 37 is provided between the monitoring device 10 and the communication device 21 as the gateway of the communication network 20, and the gateway as the gateway of the monitoring device 10 and the communication network 20 is provided. Since the line 38 is provided between the communication devices 22, the same effects as those of the first embodiment can be obtained, and at least one of the communication devices 21 and 22 connected to at least two independent lines 37 and 38 can be connected. Even when the electronic message cannot be transmitted due to an abnormality, the monitoring device 10 receives the electronic message from either one and complements the electronic message, so that the information in the communication system can be collected without omission. As a result, the reliability of the entire communication system can be further improved.

  1 monitoring system 10, 11, 12 monitoring device, 20 communication network, 21, 21 ′, 22 communication device (monitored device), 25 network, 31, 32, 33, 34, 35, 36, 37, 38 line, 101 communication unit, 101a message reception unit, 101b transmission unit, 102 database, 103 control unit.

Claims (2)

Are connected via a plurality of monitored devices and the independent lines on the network receives the message broadcast for each of the line from the plurality of the monitored device, the previously received by searching the database for later message Is stored, the communication unit that discards the message received later,
A database for storing a message received earlier by the communication unit;
A control signal based on the message which the communication unit has received previously by sending over the line that has received the message, the monitoring device and a control unit that monitors the events that have occurred on said network. A plurality of monitored devices, each connected to an independent line, and transmitting a broadcast telegram for each line based on an event occurring on the network;
Connected to the independent line, receives broadcast telegrams for each line from the plurality of monitored devices, stores previously received telegrams, discards later received telegrams, and received earlier a control signal based on the message to send over the line that has received the message, the monitoring system including a monitoring device for monitoring events occurring on the network.

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