JP2015064683A - Monitoring device, fault alarm signal generation method, fault alarm signal generation program, and communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitoring device capable of letting a maintenance person accurately grasp occurrence of an intermittent fault.SOLUTION: A monitoring device 30 includes control means of receiving an individual fault alarm signal A indicative of a signal state in a fault occurrence state or restoration state according to occurrence of or recovery from a fault from a device 50 to be monitored, generating an intermittent fault alarm signal B entering an intermittent fault state indicative of occurrence of an intermittent fault to the device to be monitored or a non-intermittent fault state indicative of non-occurrence of an intermittent fault on the basis of the individual fault alarm signal A, and determining that an intermittent fault occurs when a predetermined first condition is met so as to set an intermittent fault state as the state of the intermittent fault alarm signal B.

Description

  The present invention relates to a monitoring device that monitors a failure occurrence state of a monitoring target device, a failure alarm signal generation method, a failure alarm signal generation program, and a communication system.

  There is known a monitoring device that monitors a failure occurrence state of a monitoring target device (communication terminal, base station, server, router, or the like) connected to a network and displays a monitoring result on a display device (for example, Patent Document 1). And Patent Document 2).

  In recent years, the number of devices to be monitored has been increasing. As the monitoring target devices become more complex, the types of failures that occur in each monitoring target device are also increasing. Therefore, the monitoring result displayed on the display device is enormous and complicated. On the other hand, the number of maintenance personnel managing the maintenance of the network and the man-hours spent on the maintenance are limited, and it is required to quickly detect and maintain the failure.

  Therefore, in order to reduce the work burden on the maintenance person, the monitoring result may be displayed by the “current alarm display” method. The current alarm display is a display method in which information such as the transition of the failure occurrence status is not alerted, but only the current failure occurrence status is alerted. As a result, the maintenance staff only has to deal with alarmed faults (in other words, no action is taken for faults that are not alarmed), so the number of network devices and types of faults increase. Even so, the work load on the maintenance personnel is relatively light.

  By the way, monitoring of a display device by a maintenance person is not always performed, and generally, it is performed periodically (for example, every 2 hours) for business reasons.

  In addition, in the monitoring target device, there may be an “intermittent fault” in which the same failure occurs and recovers at the same location.

  When the monitoring device monitoring results are displayed in the current alarm display method in an environment where the maintenance device periodically monitors the display device, the monitoring timing matches the “occurrence” timing of intermittent failures The occurrence of a failure is detected by the maintenance person. However, no failure is detected when the monitoring timing matches the “recovery” timing of intermittent failures.

  Thus, when monitoring by the maintenance person is periodically performed, an intermittent failure may be overlooked in the current alarm display.

  Unlike a permanent fault, an intermittent fault may be resolved naturally even if left unattended (for example, when the operating environment is outside the product specification but within the product specification). However, most of the causes of intermittent failures are likely to be in the product itself, such as deterioration of parts, and in that case, some measures to prevent recurrence are necessary (at least it needs to be recognized by the maintenance personnel). That is, it is a problem that an intermittent failure is overlooked from the viewpoint of maintenance.

  As a warning method for solving the above problem, a “threshold warning” can be cited (for example, see Patent Document 3). The threshold alarm is a method for issuing an alarm when the number of alarms exceeds a predetermined threshold. In the case of a threshold alarm, an intermittent failure that has occurred at least above the threshold is retained.

JP2012-216893A (Page No. 6) JP 2000-069161 A (Page No. 4) JP-A-5-153243 (Page No. 2)

  However, in the case of the threshold alarm disclosed in Patent Document 3, if the number of intermittent failures does not exceed the threshold, it is not regarded as a failure. Therefore, in the case of a threshold alarm, an intermittent failure whose number of occurrences is less than or equal to the threshold cannot be detected. Furthermore, in the case of a threshold alarm, since the number of occurrences reaches the threshold and is recognized as an intermittent failure, detection of the intermittent failure is inevitably delayed. That is, in the case of the threshold alarm, since the intermittent failure is not accurately detected, the maintenance person cannot accurately grasp the occurrence of the intermittent failure.

  The present invention has been made to solve the above-described problem, and a monitoring device, a failure alarm signal generation method, a failure alarm signal generation program, and a communication system that allow a maintenance person to accurately grasp the occurrence of an intermittent failure. Is to provide.

  The monitoring device of the present invention inputs an individual failure alarm signal from which a signal is changed to a failure occurrence state or a recovery state according to the occurrence and recovery of a failure from the monitored device, and based on the individual failure alarm signal, An intermittent failure alarm signal indicating an intermittent failure state indicating that an intermittent failure has occurred in the monitoring target device or a non-intermittent failure state indicating that the intermittent failure has not occurred is generated, and the predetermined first condition is If established, it is determined that the intermittent failure has occurred, and control means is provided for setting the state of the intermittent failure alarm signal to the intermittent failure state.

  According to the failure alarm signal generation method of the present invention, an individual failure alarm signal whose signal state becomes a failure occurrence state or a recovery state is input from a monitoring target device according to the occurrence and recovery of the failure, and based on the individual failure alarm signal. Generating an intermittent failure alarm signal indicating an intermittent failure state indicating that an intermittent failure has occurred in the monitoring target device or a non-intermittent failure state indicating that the intermittent failure has not occurred. When one condition is satisfied, it is determined that the intermittent failure has occurred, and the state of the intermittent failure alarm signal is set to the intermittent failure state.

  The fault alarm signal generation program of the present invention inputs, to the computer of the monitoring apparatus, an individual fault alarm signal that causes the signal state to be the fault occurrence state or the recovery state in accordance with the occurrence and recovery of the fault from the monitoring target device, Based on the individual failure alarm signal, an intermittent failure alarm signal that becomes an intermittent failure state indicating that an intermittent failure has occurred in the monitored device or a non-intermittent failure state indicating that the intermittent failure has not occurred. When the first condition is generated, it is determined that the intermittent failure has occurred, and a program for executing a process of setting the state of the intermittent failure alarm signal to the intermittent failure state.

  In the communication system of the present invention, an individual failure alarm signal in which a signal state becomes a failure occurrence state or a recovery state in accordance with occurrence and recovery of a failure is input from a monitoring target device, and based on the individual failure alarm signal, An intermittent failure alarm signal indicating an intermittent failure state indicating that an intermittent failure has occurred in the monitoring target device or a non-intermittent failure state indicating that the intermittent failure has not occurred is generated, and the predetermined first condition is When established, it is determined that the intermittent failure has occurred, and includes a monitoring device that sets the state of the intermittent failure alarm signal to the intermittent failure state, and a display device that displays the intermittent failure alarm signal.

  According to the present invention, it is possible to make a maintenance person accurately grasp the occurrence of an intermittent failure.

It is a block diagram which shows the structural example of the communication system which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structural example of the monitoring apparatus shown in FIG. It is a flowchart for demonstrating the production | generation process of the intermittent failure alarm signal in a monitoring apparatus. It is a timing chart which shows the 1st example of operation of the intermittent trouble alarm signal generated in a 1st embodiment. It is a timing chart which shows the 2nd operation example of the intermittent failure warning signal produced | generated in 1st Embodiment. It is a timing chart which shows the operation example of the intermittent fault alarm signal produced | generated in 2nd Embodiment. It is a block diagram which shows the structural example of the monitoring apparatus which concerns on the 3rd Embodiment of this invention.

[First Embodiment]
FIG. 1 is a block diagram showing a configuration example of a communication system 10 according to the first embodiment of the present invention. The communication system 10 includes a monitoring device 30 and a display device 40.

  The monitoring device 30 monitors the occurrence / recovery status of the failure of the monitoring target device 50. The display device 40 displays a failure occurrence status (at least an intermittent failure alarm signal B described later) of the monitoring target device 50. The maintenance person can recognize a failure (at least an intermittent failure) occurring in the monitoring target device 50 by browsing the display device 40 and can take a measure corresponding to the failure.

  The monitoring target device 50 is monitored by the monitoring device 30. The monitoring target device 50 may be any device as long as it is a monitoring target device, such as a communication terminal, a base station, a server, or a router.

  The monitoring target device 50 outputs the “individual failure alarm signal A”. The individual failure alarm signal A is a signal whose signal state becomes “failure occurrence state” or “recovery state” in accordance with the occurrence and recovery of the failure. Note that the “recovery” includes both a case where the operation is normal from the beginning and a case where the operation returns to normal after a failure has occurred. In addition, a method for determining occurrence and recovery of failure in the monitoring target device 50 is arbitrary.

  There may be a plurality of monitoring target devices 50. In this case, the individual failure alarm signal A is output for each monitoring target device 50. Further, in some monitoring target device 50, a failure may be detected for a plurality of different detection targets. In this case, the individual failure alarm signal A for each detection target is output from the monitoring target device 50. Examples of detection targets include, for example, communication line status, optical signal level, electrical signal level, memory operating status, CPU (Central Processing Unit) load status, power consumption, device temperature, fan operating status (of a predetermined part) Operating temperature state).

  In the present embodiment, in order to make the description clearer, when there is one monitoring target device 50 and there is one detection target of the monitoring target device 50 (that is, an individual failure input to the monitoring device 30). For example, the alarm signal A is one type).

  FIG. 2 is a block diagram illustrating a configuration example of the monitoring device 30 illustrated in FIG. The monitoring device 30 includes a control unit 32 (control means). The control unit 32 inputs the individual failure alarm signal A from the monitoring target device 50. The control unit 32 sets an “intermittent failure alarm” that is an “intermittent failure state” indicating that an intermittent failure has occurred in the individual failure alarm signal A or a “non-intermittent failure state” indicating that no intermittent failure has occurred. Signal B "is generated. When the predetermined first condition is established, the control unit 32 determines that an intermittent failure has occurred and sets the state of the intermittent failure alarm signal B to the “intermittent failure state”. Further, when the predetermined second condition is satisfied, the control unit 32 determines that the intermittent failure has ended, and sets the state of the intermittent failure alarm signal B to the “non-intermittent failure state”. Details of the meanings of the first condition and the second condition and the generation of the intermittent failure alarm signal B will be described later.

  The intermittent failure warning signal B is generated for each individual failure warning signal A. That is, when there are a plurality of individual failure warning signals A, the intermittent failure warning signals B are generated by the number of the failure failures.

  The control unit 32 outputs at least the intermittent failure warning signal B to the display device 40.

  FIG. 3 is a flowchart for explaining a generation process of the intermittent failure alarm signal B in the control unit 32.

  The control unit 32 determines whether or not the current state of the intermittent failure alarm signal B is a “non-intermittent failure state” (step S1). When it is a “non-intermittent failure state” (Yes determination in step S1), the control unit 32 determines whether or not a predetermined first condition is satisfied (step S2). When the first condition is satisfied (Yes in Step S2), the control unit 32 shifts the state of the intermittent failure alarm signal B to the “intermittent failure state” (Step S3). After the process of step S3 is complete | finished, the control part 32 performs the process of step S1 again. When the first condition is not satisfied (No determination in step S2), the control unit 32 executes the process of step S2 again.

  On the other hand, when the current state of the intermittent failure alarm signal B is “intermittent failure state” (No determination in step S1), the control unit 32 determines whether or not a predetermined second condition is satisfied (step S4). ). When the second condition is satisfied (Yes in step S4), the control unit 32 shifts the state of the intermittent failure alarm signal B to the “non-intermittent failure state” (step S5). After the process of step S5 is complete | finished, the control part 32 performs the process of step S1 again. When the second condition is not satisfied (No determination in step S4), the control unit 32 executes the process of step S4 again.

  The first condition is that when the state of the intermittent failure warning signal B is a “non-intermittent warning state”, the change from the recovery state of the individual failure warning signal A to the failure occurrence state (hereinafter referred to as “rise”). There is a change from the failure occurrence state to the recovery state (hereinafter referred to as “falling”) until the predetermined first period elapses. The first period will be described later.

  The second condition is that the recovery state of the individual failure alarm signal A is maintained until the predetermined second period elapses after the transition of the intermittent failure alarm signal B to the “intermittent failure state”, or the individual That is, the next rising edge is not detected after the falling edge of the failure alarm signal A is detected until the second period elapses. The second period will be described later.

  In the flowchart described above, if the “intermittent failure state” is once set in step S4, the state of the intermittent failure alarm signal B does not become “non-intermittent failure state” until the process of step S6 is executed. The “intermittent failure state” is maintained.

  FIG. 4 is a timing chart showing a first operation example of the intermittent failure alarm signal B generated in the flow described in FIG. FIG. 5 is a timing chart showing a second operation example of the intermittent failure alarm signal B generated in the flow described in FIG.

  4 and 5, the individual failure alarm signal A input from the monitoring target device 50 and the intermittent failure alarm signal B generated by the monitoring device 30 are indicated by solid lines. In FIGS. 4 and 5, a threshold alarm signal C as a comparative example is indicated by a broken line. 4 and 5, the interval between the sections t1 to t14 is constant, and the interval is T. The intermittent failure repeats the occurrence and recovery of the failure every interval T.

  Note that the above example is an example for clarifying the explanation, and the occurrence period of the intermittent failure and the failure occurrence period within the occurrence cycle are not always constant. As a matter of course, the present embodiment can cope with intermittent failures in which the generation cycle and the failure generation period are not constant.

  The first period T1 is set to, for example, “a period longer than the interval T by a predetermined period α1”. When the occurrence cycle and the failure occurrence period are constant as in the present embodiment, the first period T1 is set to a period longer than the “interval T” by a predetermined period α1. On the other hand, in the case of an intermittent failure whose occurrence cycle and failure occurrence period are not constant, the first period T1 may be a period longer than the “arbitrary failure occurrence period for each intermittent failure” by a predetermined period α1. The “arbitrary failure occurrence period for each intermittent failure” is estimated in advance by a predetermined method.

  When the failure that has occurred is an “intermittent failure”, in the individual failure alarm signal A, there is a high possibility that the next change (rise or fall) will occur at every interval T (interval in the present embodiment). On the other hand, when the failure that has occurred is a “permanent failure”, the possibility of the next change occurring at every interval T is low. As described above, by setting the first period T1 to, for example, “a period longer than the interval T by the predetermined period α1”, an intermittent failure is not overlooked and another failure (permanent failure) is mistaken as an intermittent failure. This can be achieved by avoiding the situation of detection, and as a result, the detection accuracy of intermittent faults can be improved.

  The second period T2 is set to, for example, “a period longer than the interval T × 2 by a predetermined period α2.” When the intermittent failure occurrence cycle is constant as in the present embodiment, the second period T2 is set to a period longer than the “interval T × 2” by a predetermined period α2. On the other hand, in the case of an intermittent failure whose occurrence cycle is not constant, the second period T2 may be a period longer than the “arbitrary occurrence cycle for each intermittent failure” by a predetermined time α2. In short, the second period T2 is set to a period during which it can be determined that the intermittent failure has ended. It is assumed that “arbitrary occurrence period for each intermittent failure” is estimated in advance by a predetermined method.

  The predetermined period α1 and the predetermined period α2 may be the same. Further, the predetermined period α1 and the predetermined period α2 are arbitrary times, but for example, 0 <α1 (α2) <interval T can be satisfied.

  FIG. 4 will be described. FIG. 4 illustrates the individual failure alarm signal A in which intermittent failures occur continuously in the sections t1 to t5.

  When the current state of the intermittent failure alarm signal B is “non-intermittent failure state” (section t0), the control unit 32 causes the individual failure alarm signal A to rise (restoration state → failure occurrence state) at the start of the section t1. ) Is detected. The control unit 32 determines whether a fall (failure occurrence state → recovery state) is detected within the first period T1 from the start time.

  In FIG. 4, the individual failure warning signal A falls at the start time of the section t2, that is, the time after the interval T has elapsed from the start time of the section t1. As described above, the relationship of the first period T1> the interval T is established. Therefore, the control unit 32 determines that the falling edge is detected in the first period T1 (that is, determines that the first condition is satisfied), and sets the state of the intermittent failure alarm signal B at the start time of the section t2. Intermittent failure status ”.

  After the intermittent failure alarm signal B becomes “intermittent failure state” (section t2), it is determined whether or not the second condition is satisfied (step S4). That is, the recovery state of the individual failure alarm signal A is maintained until the second period T2 elapses after the transition of the intermittent failure alarm signal B to the “intermittent failure state”, or the individual failure alarm signal A It is determined whether or not the next rising edge is detected after the falling edge is detected and before the second period T2 elapses.

  In FIG. 4, the start of the section t <b> 3 is started until the second period T <b> 2 elapses (start time of the section t <b> 4 + α <b> 2) after the intermittent failure alarm signal B shifts to the “intermittent failure state” (start time of the section t <b> 2). A rise has occurred at the time (that is, the second condition is not satisfied). Accordingly, the intermittent failure alarm signal B does not become a “non-intermittent failure state” at the timing of the start time of the section t4 + α2.

  Further, in FIG. 4, a falling edge is detected at the start time of the section t4. A rise occurs at the start time of the section t5 until the second period T2 elapses after the fall is detected (start time of the section t6 + α2) (that is, the second condition is satisfied). Absent). Accordingly, the intermittent failure alarm signal B does not become a “non-intermittent failure state” at the timing of the start time of the section t6 + α2.

  Further, in FIG. 4, a falling edge is detected at the start time of the section t6. The rising does not occur (that is, the second condition is satisfied) until the second period T2 elapses after the falling is detected (start time + α2 of the section t8). Accordingly, the intermittent failure alarm signal B is in the “non-intermittent failure state” at the start time of the section t8 + α2.

  FIG. 4 shows a threshold alarm signal C (indicated by a broken line) as a comparative example. The threshold alarm signal C is issued when the number of alarms exceeds a predetermined threshold. In FIG. 4, a case where the threshold value is set to twice is taken as an example. In this case, the threshold alarm signal C is finally in the “intermittent failure state” not at the first rise (start time of the section t1) but at the time of detecting the second rise (start time of the section t3). Note that the minimum threshold in the threshold alarm signal C is “2”. This is because if the threshold is set to “1”, it is recognized that an intermittent failure has occurred as soon as one rise is detected, and in this case, the intermittent failure and the permanent failure cannot be distinguished.

  Next, FIG. 5 will be described. FIG. 5 illustrates an individual failure alarm signal A in which an intermittent failure occurs only in the section t1.

  The point at which the intermittent failure alarm signal B is set to the “intermittent failure state” after the start of the interval t2, that is, after the interval T has elapsed from the start point of the interval t1, and the intermittent failure alarm signal B is “intermittent failure state” (section It is the same as in FIG. 4 in that it is determined whether or not the second condition is satisfied after t2).

  In FIG. 5, the recovery state of the individual failure alarm signal A is maintained from the transition of the intermittent failure alarm signal B to the “intermittent failure state” until the second period T2 elapses (that is, the second condition). Is established). Accordingly, the intermittent failure alarm signal B is in a “non-intermittent failure state” at the start time of the section t4 + α2.

  FIG. 5 shows a threshold alarm signal C (indicated by a broken line) as a comparative example. The threshold alarm signal C is issued when the number of alarms exceeds a predetermined threshold. In FIG. 5, a case where the threshold value is set to twice is taken as an example. In FIG. 5, as described above, the intermittent failure occurs only in the section t1. In this case, as a matter of course, the rise in the individual failure alarm signal A occurs only at the start time of the section t1. Therefore, in the case of the threshold alarm signal C that recognizes the occurrence of an intermittent failure only after detecting a plurality of (two or more) rises, it is not possible to detect an intermittent failure that occurs once (FIG. 5). Indicates a state in which the state of the identification alarm signal C is always “non-intermittent fault state”).

  The intermittent fault alarm signal B generated in the first embodiment described above has the following advantages compared to the individual fault alarm signal A and the threshold alarm signal C.

  In the case of the individual failure alarm signal A, when the alarm monitoring timing (viewing of the display device 40) by the maintenance person coincides with the timing of the “recovery period” during the intermittent failure (for example, in FIG. 4, sections t2 and t4) , T6), the occurrence of the intermittent failure is not recognized by the maintenance person. That is, the intermittent failure is overlooked.

  On the other hand, in the case of the threshold alarm signal C, the detection of the intermittent failure is delayed because it is recognized as the intermittent failure only after reaching the threshold (in this embodiment, the case of twice is taken as an example) (see FIG. 4). In the case of the threshold alarm signal C, it is not considered that a failure has occurred unless the number of intermittent failures is greater than or equal to the threshold. Therefore, in the case of the threshold alarm signal C, an intermittent failure whose number of occurrences is equal to or less than the threshold cannot be detected (see FIG. 5). Further, the threshold alarm signal C does not have a technique for automatically canceling the alarm (in the case of FIG. 4, the intermittent alarm that occurred in the section t3 has been recovered thereafter, but the threshold alarm signal C "Non-intermittent fault condition" is not achieved).

  On the other hand, in the case of the intermittent failure alarm signal B, the interval T after the first intermittent failure occurs (in the case of an intermittent failure in which the occurrence cycle and the failure occurrence period are not constant, “arbitrary failure occurrence period for each intermittent failure”) ) Alarmed and maintained after elapse.

  Therefore, as long as the alarm monitoring period is not extremely long (for example, unless it is once / day, etc.), the intermittent failure alarm signal B is not overlooked as in the individual failure alarm signal A. Further, in the intermittent failure alarm signal B, the intermittent failure that has not reached the threshold number of times and the detection delay of the intermittent failure that occur in the threshold alarm signal C do not occur.

  Further, in the case of the intermittent failure alarm signal B, the alarm is automatically canceled when it is determined that the intermittent failure has ended and has been recovered. Therefore, as in the case of the threshold alarm signal C, it can be avoided that the intermittent fault alarm is unnecessarily maintained even though the intermittent fault is completed and recovered.

  In summary, according to the first embodiment, the maintenance person can accurately grasp the occurrence of the intermittent failure.

  Further, the intermittent failure alarm signal B is generated only by monitoring the individual failure alarm signal A by the monitoring device 30. Therefore, it is not necessary to change the configuration of the existing devices (that is, the monitoring target device 50 and the display device 40) when introducing the present embodiment.

  In the first embodiment described above, when there are a plurality of individual fault alarm signals A, the first period T1 and the second period T2 are for each individual fault alarm signal A (for each monitoring target device 50 or for each detection target). Can be set individually.

  Moreover, when displaying an alarm on the display device 40, in addition to the intermittent fault alarm signal B, other alarms (for example, the individual fault alarm signal A and the threshold alarm signal C) may be displayed.

  In addition to the above-described conditions (conditions for detecting a fall from the rise of the individual fault alarm signal A until the first period T1 elapses), the first condition is an additional condition (the individual fault alarm signal A). The condition for detecting the rising edge from the falling edge until the predetermined third period elapses) can also be included. In rare cases, the failure occurrence period in the intermittent failure becomes longer than the first period T1 due to changes in the surrounding environment, variations in the aircraft, and the like. If the failure occurrence period of all intermittent failures becomes longer than the first period T1, there is a possibility that the intermittent failure itself cannot be detected. By adding the above-mentioned additional conditions, it is possible to prevent an intermittent failure from being detected although the detection timing is somewhat delayed.

  Note that the third period under the additional condition can be set to a time longer than the recovery period in the intermittent failure by a predetermined time (in this embodiment, the interval T + the predetermined period α3). Here, α3 is arbitrary, and can be, for example, 0 <α3 <interval T.

In addition, an object of the present invention (to allow the maintenance person to accurately grasp the occurrence of an intermittent failure) is a process for shifting the state of the intermittent failure alarm signal B to the “intermittent alarm state” (shown in steps S1 to S3 in FIG. 3). Processing) only. In other words, the process of setting the intermittent failure alarm signal B to the “non-intermittent alarm state” (the processes shown in steps S4 and S5 in FIG. 3) is not an essential component of the invention.
[Second Embodiment]
In the first embodiment, it has been described that the state of the individual failure alarm signal A is either “failure occurrence state” or “recovery state”. There is no particular level in the failure occurrence state, and there is shown a case where there is only one state (that is, only whether or not a failure has occurred).

  However, some detection targets output individual fault alarm signals having a plurality of alarm levels having different importance levels when a fault occurs. For example, when detecting an abnormal operation of the fan (operation temperature abnormality at a predetermined location), a plurality of alarms having different importance levels, for example, alarm level 1 (risk level (small)), alarm level 2 (risk level (large)) May be output.

  In this case, since the contents of countermeasures differ depending on the alarm level, the monitoring device 30 needs to notify the maintenance person which alarm level of the failure has occurred. When these alarms are intermittent, the maintenance person needs to deal with the highest alarm level.

  FIG. 6 is a timing chart showing an example of the operation of the intermittent failure alarm signal B1 generated in the second embodiment. The configuration of the communication system 10 and the monitoring device 30 in the second embodiment, the basic generation process of the intermittent failure alarm signal B1 in the second embodiment, and the basic description of FIG. Since it is the same as the form, description thereof will be omitted.

  In FIG. 6, an individual failure alarm signal A <b> 1 is an individual failure alarm signal output from the monitoring target device 50. The fault occurrence state of the individual fault alarm signal A1 is set to a different level for each alarm having a different importance level. In the case of the present embodiment, a case of two different alarms (a low importance alarm and a high importance alarm) will be described as an example. Hereinafter, a level corresponding to an alarm having a low importance level is referred to as a “first failure occurrence state”, and a level corresponding to an alarm having a high importance level is referred to as a “second failure occurrence state”.

  The individual failure alarm signal A1 in FIG. 6 indicates a state in which intermittent failures occur continuously in the sections t1 to t7 and a single intermittent failure occurs in the section t11. Further, the individual failure alarm signal A1 indicates a state in which an alarm having a low importance level is generated in the sections t1, t3, t5, and t7 and an alarm having a high level of importance is generated in the sections t4 and t11.

  In FIG. 6, an intermittent failure alarm signal B1 is an intermittent failure alarm signal generated by the monitoring device 30 of the second embodiment. When the current state of the intermittent failure alarm signal B1 is “non-intermittent failure state” (section t0), the control unit 32 raises the individual failure alarm signal A1 (restoration state → first failure at the start of the section t1). Detection). The control unit 32 determines whether or not a fall (first failure occurrence state → recovery state) is detected during the elapse of the first period T1 from the start time.

  In FIG. 6, the state of the individual failure alarm signal A1 changes from the first failure occurrence state to the recovery state after an interval T has elapsed from the start time of the section t2, that is, the start time of the section t1. As in the first embodiment, the relationship of first period T1> interval T is established. Therefore, the control unit 32 determines that the falling is detected in the first period T1 (that is, determines that the first condition is satisfied), and determines the state of the intermittent failure alarm signal B1 at the start time of the section t2. A “first intermittent failure state” is set in correspondence with the level of the individual failure alarm signal A1.

  After the state of the intermittent failure alarm signal B1 shifts to the “first intermittent failure state” (after the section t2), the control unit 32 causes the falling (second second) of the individual failure alarm signal A1 as in the first embodiment. In the case of the embodiment, the first failure occurrence state → the recovery state) is detected, and rises during the second period T2 from that time (in the case of the second embodiment, the recovery state → the first failure occurrence) It is determined whether or not (status) is detected. Furthermore, in the case of the second embodiment, after the state of the intermittent failure alarm signal B1 shifts to the “first intermittent failure state” (after the section t2), the control unit 32 further increases the individual failure alarm signal A1 ( In the case of the second embodiment, it is determined whether or not (first failure occurrence state → second occurrence state) is detected.

  Then, as shown in FIG. 6, at the start of the section t4, the state of the individual failure alarm signal A1 changes from the first failure occurrence state to the second failure occurrence state. The control unit 32 that has detected this change sets the state of the intermittent failure alarm signal B1 to the “second intermittent failure state” at the start time of the section t4. In this case, since the occurrence of the intermittent failure has already been detected (that is, the state of the intermittent failure alarm signal B1 is equal to or higher than the “first intermittent failure state”), the control unit 32 is in response to the further rising. The state of the intermittent failure alarm signal B1 is immediately shifted to the “second intermittent failure state” without performing the intermittent failure confirmation processing (comparison processing with the first period T1).

  After the state of the intermittent failure alarm signal B1 shifts to the “second intermittent failure state” (after the section t4), the individual failure alarm signal A1 falls to the first failure occurrence state at the start of the section t5. The control unit 32 sets the “second intermittent failure state” without shifting the state of the intermittent failure alarm signal B1 to the “first intermittent failure state” (that is, the alarm shifts to a low importance alarm). maintain.

  Thereafter, the control unit 32 detects a fall (in this case, the first failure occurrence state → the restoration state) at the start time of the section t8, and the rise is detected while the second period T2 elapses from that time point. It is determined whether or not. In FIG. 6, no rise (occurrence of the next intermittent failure) has occurred from the start of the interval t8 until the second period T2 elapses (the start time of the interval t10 + α2), so the intermittent failure ends. And it is judged that it has recovered. The control unit 32 sets the state of the intermittent failure alarm signal B1 to the “non-intermittent failure state” at the timing of the start time of the section t10 + α2.

  Thereafter, the state of the individual failure warning signal A1 changes from the recovery state directly to the second failure occurrence state (warning level high) at the start of the section t11. The control unit 32 determines whether or not a fall (second failure occurrence state → recovery state) is detected during the elapse of the first period T1 from the start time. In this case, since the recovery is only required to shift to the recovery state, a mere alarm level down (second failure occurrence state → first failure occurrence state) is ignored.

  In FIG. 6, the state of the individual failure alarm signal A1 changes from the second failure occurrence state to the recovery state after an interval T has elapsed from the start time of the section t12, that is, the start time of the section t1. As in the first embodiment, the relationship of first period T1> interval T is established. Therefore, the control unit 32 determines that the falling is detected in the first period T1, and sets the state of the intermittent failure alarm signal B1 at the start time of the section t12 to correspond to the alarm level of the individual failure alarm signal A1. “Second intermittent failure state”.

  In FIG. 6, the recovery state of the individual failure alarm signal A1 is maintained until the second period T2 elapses from the transition of the intermittent failure alarm signal B1 to the “second intermittent failure state” (start time of the section t14 + α2). (That is, the second condition is satisfied). Accordingly, the intermittent failure alarm signal B is in a “non-intermittent failure state” at the start time of the section t14 + α2.

  According to the second embodiment described above, the same effects as those of the first embodiment can be obtained.

  Furthermore, in the second embodiment, when the control unit 32 detects a change in the generation state of the individual failure alarm signal A1 to a higher level, the level of the intermittent failure state of the intermittent failure alarm signal B1 is increased to a higher level. And the state is maintained until the intermittent failure ends. Therefore, the maintenance person can surely grasp not only the occurrence of the intermittent failure itself but also the occurrence of an alarm having a higher importance.

  FIG. 6 shows a state where the first failure occurrence state and the second failure occurrence state are mixed in the individual failure alarm signal A1, but only one of the failure occurrence states occurs. Of course, it is possible to respond. In that case, the waveforms of the individual fault alarm signal A1 and the intermittent fault alarm signal B1 are, as shown in FIGS. 4 and 5, the waveforms of two states (failure occurrence state / recovery state, intermittent fault state / non-intermittent fault state). Become.

In the second embodiment, an example in which the failure occurrence state of the individual failure alarm signal A1 and the intermittent failure state of the intermittent failure alarm signal B1 corresponding to the failure occurrence state is described in two stages. It is.
[Third Embodiment]
FIG. 7 is a block diagram illustrating a configuration example of the monitoring apparatus 100 according to the third embodiment of the present invention. The monitoring device 100 includes a CPU 102 and a memory 104.

  The memory 104 stores a failure alarm signal generation program 200. The failure alarm signal generation program 200 is executed by the CPU 102. Examples of the memory 104 include non-temporary storage means such as a ROM (Read Only Memory), a hard disk, a removable medium, or a removable disk.

  The failure alarm signal generation program 200 inputs, to the CPU 102, an individual failure alarm signal whose signal state becomes a failure occurrence state or a recovery state according to the occurrence and recovery of the failure from the monitoring target device, and the signal state is the individual failure An intermittent failure alarm signal is generated which is an “intermittent failure state” indicating that an intermittent failure has occurred in the alarm signal, or a “non-intermittent failure state” indicating that an intermittent failure has not occurred. When the condition is satisfied, the program is a program for determining that an intermittent failure has occurred and executing processing for setting the state of the intermittent failure alarm signal to “intermittent failure state”. The failure alarm generation signal program 200 is obtained by programming the processing shown in steps S1 to S3 in the flowchart of FIG.

  The third embodiment described above provides the same effects as those of the first embodiment.

DESCRIPTION OF SYMBOLS 10 Communication system 30 Monitoring apparatus 32 Control part 40 Display apparatus 50 Monitoring object apparatus 100 Monitoring apparatus 102 CPU
104 memory 200 fault alarm signal generation program A, A1 individual fault alarm signal B, B1 intermittent fault alarm signal C threshold alarm signal T interval T1 first period T2 second period t0 to t14 interval

Claims (10)

From the monitored device, an individual failure alarm signal whose signal state becomes a failure occurrence state or a recovery state according to the occurrence and recovery of the failure is input, and based on the individual failure alarm signal, an intermittent failure occurs in the monitored device. When an intermittent failure alarm signal indicating an intermittent failure state indicating that the failure has occurred or a non-intermittent failure state indicating that the intermittent failure has not occurred is generated, and the predetermined first condition is satisfied, the intermittent failure state And a control means for determining that the intermittent failure warning signal is in the intermittent failure state.   The first condition is that when the intermittent failure warning signal is in a non-intermittent warning state, a predetermined first period of time has elapsed after the individual failure warning signal has changed from the recovery state to the failure occurrence state. The monitoring apparatus according to claim 1, wherein the monitoring apparatus changes from the failure occurrence state to the recovery state before the time elapses.   The monitoring apparatus according to claim 2, wherein the first period is set to a period longer than the estimated predetermined intermittent failure occurrence period by a predetermined period.   The said control means judges that the said intermittent failure was complete | finished when predetermined 2nd conditions are satisfied, and makes the state of the said intermittent failure warning signal into the said non-intermittent failure state, It is characterized by the above-mentioned. The monitoring device according to any one of the above.   The second condition is that a recovery state of the individual failure alarm signal is maintained until a predetermined second period elapses from the transition of the intermittent failure alarm signal to the intermittent failure state, or the individual condition 5. The monitoring apparatus according to claim 4, wherein the next rising edge is not detected during the period from when the falling edge of the failure alarm signal is detected until the second period elapses.   6. The monitoring apparatus according to claim 5, wherein the second period is set to a period longer than the estimated predetermined intermittent failure occurrence period by a predetermined period. The failure occurrence state of the individual failure alarm signal is set to a different level for each of a plurality of different importance alarms,
The intermittent failure state of the intermittent failure alarm signal can be set to a different level corresponding to the failure occurrence state,
When the control means detects a change in the fault occurrence state of the individual fault alarm signal to a higher level, the control means changes the level of the intermittent fault alarm signal to a higher level, and more The monitoring device according to any one of claims 1 to 6, wherein the state changed to a high level is maintained until the intermittent failure ends. From the monitored device, an individual failure alarm signal whose signal state becomes a failure occurrence state or a recovery state according to the occurrence and recovery of the failure is input, and based on the individual failure alarm signal, an intermittent failure occurs in the monitored device. When an intermittent failure alarm signal indicating an intermittent failure state indicating that the failure has occurred or a non-intermittent failure state indicating that the intermittent failure has not occurred is generated, and the predetermined first condition is satisfied, the intermittent failure state A fault warning signal generation method, wherein the fault fault signal is determined to have occurred, and the state of the intermittent fault warning signal is set to the intermittent fault state. On the computer of the monitoring device,
From the monitored device, an individual failure alarm signal whose signal state becomes a failure occurrence state or a recovery state according to the occurrence and recovery of the failure is input, and based on the individual failure alarm signal, an intermittent failure occurs in the monitored device. When an intermittent failure alarm signal indicating an intermittent failure state indicating that the failure has occurred or a non-intermittent failure state indicating that the intermittent failure has not occurred is generated, and the predetermined first condition is satisfied, the intermittent failure state A fault alarm signal generation program for executing processing for determining that an intermittent fault alarm signal has occurred and setting the state of the intermittent fault alarm signal to the intermittent fault state. From the monitored device, an individual failure alarm signal whose signal state becomes a failure occurrence state or a recovery state according to the occurrence and recovery of the failure is input, and based on the individual failure alarm signal, an intermittent failure occurs in the monitored device. When an intermittent failure alarm signal indicating an intermittent failure state indicating that the failure has occurred or a non-intermittent failure state indicating that the intermittent failure has not occurred is generated, and the predetermined first condition is satisfied, the intermittent failure state A monitoring device that determines that the intermittent failure warning signal is in the intermittent failure state,
And a display device for displaying the intermittent failure alarm signal.

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