JPH1074108A - Fault detection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable all monitored systems to detect the faults of the temporary faulty parts based on the common proper threshold by comparing the temporary failure occurrence frequency of every part of the monitored systems with the common threshold and deciding the occurrence of faults via a monitoring system. SOLUTION: The monitored systems 18A, 18B and 18C send the temporary failure information when the temporary failures which can be automatically recovered occur in these systems. Then a means is added to receive and store the temporary failure information and counts the temporary failure occurrence frequency to compare it with the prescribed threshold. When the temporary failure occurrence frequency is equal to or larger than the threshold, a central control part 12 decides a fault of the relevant parts to register it in a failure history data base 15 and transfers the information to a fault display control part 16 to show it on a display device 17. Then the part 12 notifies the system 18A of the fault of the relevant parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure detection method, and more particularly to a failure detection method when a temporary failure occurs in a system.

[0002]

2. Description of the Related Art Even if a system failure occurs, if the failure is a temporary failure that is automatically recovered by retrying or the like, the failure is normally treated as if it were not on the surface. Therefore, even if defective parts are mounted, shipped with insufficient adjustment, or if the quality has deteriorated due to aging or changes in the operating environment, the progress of the deterioration is not known, and the occurrence of a failure is required in advance. And the performance and reliability of the system decrease.

[0003] Therefore, there is a failure detection method in which the number of retries or the number of failure occurrences is stored when the above-mentioned temporary failure occurs and the deterioration state is notified when the number of times exceeds a threshold value. It is conventionally known (for example, Japanese Patent Application Laid-Open No. 4-165538: title of the invention "Peripheral storage device with deterioration state detection function").

FIG. 3 is a block diagram showing an example of a conventional fault detection system for detecting a fault similar to the above. In FIG. 1, a monitoring system 1 includes a central control unit 2, a communication control unit 3, a fault display control unit 4, and a display device 5, and detects a fault in the monitored systems 6A, 6B, and 6C. Each of the monitored systems 6A, 6B, and 6C has the same configuration, and includes a central control unit 7, a state information storage unit 8, and a communication control unit 9.

In this conventional system, the monitoring system 1 receives the temporary failure information from the monitored systems 6A, 6B and 6C via the communication control unit 3. Now, the monitored system 6
If a temporary failure that automatically recovers after the failure is detected in A occurs, the failure information is transferred to the central control unit 7. The central control unit 7 recognizes a failed part based on the inputted failure information, and updates the error counter value of the corresponding component stored in the state information storage unit 8 by +1.

Then, the central control unit 7 reads the error counter value of the added component from the state information storage unit 8 and compares it with a threshold value set in the monitored system 6A in advance. If the comparison result is equal to or less than the threshold value, the process is terminated. If the comparison result is equal to or greater than the threshold value, the part for which the temporary failure has been notified is regarded as a failure, and the part is separated from the system. Further, the central control unit 7 activates the communication control unit 9 and notifies the monitoring system 1 of a failure.

The monitoring system 1 includes monitored systems 6A to 6A.
When the communication control unit 3 receives the failure information from 6C, it transfers it to the central control unit 2. The central control unit 2 recognizes the monitored system 6A in which the fault has occurred and the content of the fault from the transferred fault information, transfers the display information to the fault display control unit 4, and causes the display device 5 to display the fault content. .

[0008]

However, in the above-described conventional fault detection system, a threshold value is set for each of the monitored systems 6A to 6C, and the number of temporary fault occurrences is compared with the threshold value. There is a monitored system 6A
If the administrator of ~ 6C incorrectly sets the threshold value, or sets it incorrectly or incorrectly to an inappropriate value, a faulty component becomes latent, which hinders the operation and maintenance of the system. There is a problem.

[0009] Further, even after a component once detected as a failure is repaired, the failure reappears due to a potential problem by being diverted to another monitored system, and the threshold set in the system is not changed. There is a problem that a failure is not detected unless a temporary failure is repeated until the failure is reached.

[0010] The present invention has been made in view of the above points,
It is an object of the present invention to provide a failure detection method in which all monitored systems can detect a failure of a temporarily failed component using a common appropriate threshold.

Another object of the present invention is to provide a failure detection method capable of promptly responding to a latent defect.

[0012]

In order to achieve the above object, the present invention has a function of transmitting temporary failure information indicating the occurrence of a temporary failure of a part when the temporary failure that can be automatically recovered has occurred in the part. A communication with one or more monitored systems having at least a function of disconnecting the component notified of the failure detection from the system when receiving a failure detection notification from the outside, receiving the temporary failure information, and transmitting the failure detection notification A control unit, a history accumulation unit for accumulating a history of the component having the temporary failure based on the temporary failure information received by the communication control unit, and a failure occurrence count of the component having the temporary failure obtained from the history accumulation unit. A monitoring system having a detecting means for determining whether or not the value is equal to or more than a predetermined threshold value, and when the value is equal to or more than the threshold value, determining that the component is faulty and notifying fault detection And it features.

According to the present invention, the temporary failure information from the monitored system is analyzed by the monitoring system, and the number of temporary failure occurrences is stored for each component. Since the occurrence is detected, the number of temporary failure occurrences of each component of all the monitored systems is compared with a common threshold value, and the monitoring system determines whether a failure has occurred.

The history storing means of the monitoring system according to the present invention stores the history as it is by the detecting means when a component having a temporary failure is determined as a failed component by the detecting means and is replaced by a normal component in the monitored system. When the detecting means subsequently receives, via the communication control section, temporary failure information indicating the occurrence of a temporary failure of the repaired part in which the failed part has been repaired, the detecting means repairs the repaired part in which the temporary failure occurred. It is characterized in that the previous number of occurrences of failures is retrieved, a failure is detected in the repaired part, and a failure detection notification is issued.

According to the present invention, if a temporary failure occurs after a component once detected as having a failure is repaired, a value obtained by adding +1 to the temporary failure occurrence number before the repair is the temporary failure occurrence number. , Which is larger than the threshold value, and the occurrence of a failure is immediately detected.

[0016]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration diagram of an embodiment of a failure detection system according to the present invention. In this embodiment,
A plurality of monitored systems 18A, 18B, and 18C each having a function of transmitting the temporary failure information when a temporary failure that can be automatically recovered internally is received, and the temporary failure information is received, accumulated, and stored. The monitoring system 11 includes means for measuring the number of temporary failures and comparing it with a preset threshold value.

The monitoring system 11 controls the components of the system, and analyzes the temporary fault information of all the monitored systems 18A to 18C to be monitored. A communication control unit 13 for receiving temporary failure information; a failure information storage unit 14 for storing and controlling an analysis result from the central control unit 12 in a failure history database 15; and a failure display to which display information from the central control unit 12 is input. It comprises a control unit 16 and a display device 17 for displaying display information by the fault display control unit 16.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. The failure detection operation of the monitoring system 11 of FIG. 1 will be described with reference to a case where a temporary failure has occurred in the monitored system 18A. The monitored system 18A transmits temporary failure information to the monitoring system 11 (step 21 in FIG. 2). ). The monitoring system 11 receives the temporary failure information in the communication control unit 13 and transfers it to the central control unit 12 (step 22 in FIG. 2).

The central control unit 13 analyzes the received temporary failure information and recognizes the serial number of the failed component in which the temporary failure has occurred. As a result, the central control unit 12 updates (accumulates) the number of temporary failure occurrences of the serial number of the failed component in which the temporary failure has occurred in the failure history database 15 of all monitored systems via the failure information storage unit 14. (Figure 2
Step 22).

Thereafter, the central control unit 12 searches the history of the corresponding part from the failure history database 15 via the failure information storage unit 14 based on the serial number (step 23 in FIG. 2). The central control unit 12 compares the number of temporary failure occurrences of the part with a threshold set in advance by the monitoring system 11 from the history of the part searched based on the serial number (step 24 in FIG. 2). If the number of times of temporary failure occurrence is less than the threshold, the process is terminated.

On the other hand, when the number of temporary failure occurrences is equal to or greater than the threshold value, the central control unit 12 regards the part as a failure, registers the failure in the failure history database 15, and displays the failure in the failure display. The necessary information is transferred to the failure display control unit 16, and the occurrence of the failure is displayed on the display device 17 (step 25 in FIG. 2). The central control unit 12 further notifies the monitored system 18A that has transmitted the temporary failure information via the communication control unit 13 of a component failure (FIG. 2).
Step 26).

When the monitored system 18A receives the failure notification, it disconnects the component from the system (step 27 in FIG. 2). Then, when the component notified of the failure in the monitored system 18A is replaced with a normal component and incorporated into the system, the monitored system 18A notifies the monitoring system 11 of the restoration of the failure (Step 28 in FIG. 2).

In the monitoring system 11, the communication control unit 13
Then, the failure recovery notification is received and transferred to the central control unit 12, and the central control unit 13 controls the failure display control unit 16 based on the failure recovery notification input to cancel the failure occurrence display on the display device 17. At the same time, the failure information storage unit 14 is controlled to register the serial number of the replaced part in the failure history database 15 (step 29 in FIG. 2). However, the central control unit 12 stores the history of the failed component in the failure history database 15 as it is.

Thereafter, after the failed component replaced with a normal component by the monitored system 18A is repaired and, for example, diverted to the monitored system 18B, the component is temporarily restored in the monitored system 18B. Assuming that a failure has occurred, the monitored system 18B transmits temporary failure information to the monitoring system 11 (step 21 in FIG. 2).

The central control unit 13 in the monitoring system 11 analyzes the received temporary fault information, recognizes the serial number of the faulty component in which the temporary fault has occurred, and checks the fault history database 15 for the fault in which the temporary fault occurred. The number of times of temporary failure occurrence of the serial number of the part is updated and registered (accumulated) (step 22 in FIG. 2). Thereafter, the central control unit 12 searches the history of the corresponding part from the failure history database 15 via the failure information storage unit 14 based on the serial number (Step 23 in FIG. 2).

The central control unit 12 recognizes from the retrieved serial number that the component has previously detected a failure exceeding the threshold value in the monitored system 18A, and the number of temporary failure occurrences has already been determined. Since the threshold value is exceeded when the failure is detected, even if the first temporary failure occurs for the repaired part in the monitored system 18B,
The central control unit 12 determines that a failure has occurred as a result of the comparison between the number of temporary failures and the threshold value, and performs failure detection processing starting from step 25 in FIG. 2 based on the failure history.

[0027]

As described above, according to the present invention,
The number of temporary failure occurrences of each component of all monitored systems is compared with a common threshold value, and the monitoring system determines whether a failure has occurred. Can be detected.

Further, according to the present invention, if a temporary failure occurs after a component once detected as having a failure has been repaired, the failure is immediately detected as a failure, so that a potential failure can be quickly resolved. Can be handled.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of FIG. 1;

FIG. 3 is a configuration diagram of a conventional example.

[Explanation of symbols]

 Reference Signs List 11 monitoring system 12 central control unit 13 communication control unit 14 failure information storage unit 15 failure history database 16 failure display control unit 17 display device 18A, 18B, 18C monitored system

Claims (3)

[Claims] 1. A function of transmitting temporary failure information indicating the occurrence of a temporary failure of a component when a temporary failure that can be automatically recovered from the component occurs, and detecting the failure when an external failure detection notification is received. One or more monitored systems having at least a function of separating the notified component from the system, a communication control unit that receives the temporary failure information, and transmits the failure detection notification, and a communication control unit that receives the failure detection notification. A history accumulating means for accumulating the history of the component having the temporary failure based on the temporary failure information, and determining whether the number of failure occurrences of the component having the temporary failure obtained from the history accumulating means is equal to or greater than a predetermined threshold. A monitoring system comprising a detecting unit for determining whether the component is faulty and determining that the component is faulty when the threshold value or more is detected. Out method. 2. The history accumulating means of the monitoring system, wherein the component in which the temporary failure has occurred is determined by the detecting means as a faulty component, and the history is stored as it is even after being replaced by a normal component in the monitored system. When the detection unit receives the temporary failure information indicating the temporary failure occurrence of the repaired component that has repaired the failed component via the communication control unit, the detection unit generates the temporary failure from the history accumulation unit. 2. The failure detection method according to claim 1, wherein the number of times of occurrence of the failure before the repair of the repair part is searched, and the failure detection notification is performed when it is determined that the repair part has a failure. 3. The monitoring system, comprising: a communication control unit that receives the temporary failure information and transmits the failure detection notification; a history accumulation unit that accumulates a history of a component in which a temporary failure has occurred; Analyze the temporary failure information received by, after updating and registering the number of times of failure of the component that has caused the temporary failure in the history storage means, compare the updated number of times of temporary failure and the threshold, It is determined whether the number of times of temporary failure occurrence is equal to or greater than the threshold value. If the number is equal to or greater than the threshold value, the communication control unit transmits the failure detection notification to the monitored system that has transmitted the temporary failure information. A fault detection method comprising: a control unit; a fault display control unit to which display information from the central control unit is input; and a display device that displays display information by the fault display control unit.