JPH04242830A - Failure diagnosing device - Google Patents

Abstract

PURPOSE:To infer a symptom, where elapse of time should be taken into consideration, with a high precision in a failure diagnosing device. CONSTITUTION:An operator in charge of maintenance or a user inputs user's inquiry about failure and the operation method to an input device 22 by another picture. A backup memory 16 consists of failure diagnostic information memories 40 and 42 where failure diagnostic information required for failure diagnosis such as causes of failure and countermeasures are stored correspondingly to failure symptoms. Based on the inquiry inputted from the input device 22, an inference program in a ROM 14 performs inference in consideration of elapse of time if elapse of time should be taken into consideration, but it performs inference without taking elapse of time into consideration if it is unnecessary to take elapse of time into consideration. The retrieval result is outputted to a display device 32.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applicable to machine tools, printers,
The present invention relates to a failure diagnosis device for equipment such as sewing machines, and particularly relates to a technology for improving the accuracy of failure diagnosis over time.

0002

[Background Art] Conventionally, failure diagnosis devices have been used to detect problems when an operator receives a notification of a failure from a user of a machine tool or a printer, or when the user himself inputs the situation.
It was a device that inferred from the knowledge stored in the device and output possible causes and countermeasures to provide appropriate recovery instructions to users and maintenance personnel. The function of the input means is a device that captures the status of equipment online (Japanese Patent Laid-Open No. 62-8255), the device that has multiple diagnostic knowledge (Japanese Patent Laid-Open No. 62-6846), and the function of the output means is a voice output. A device (Japanese Unexamined Patent Publication No. 61-57868) is known.

0003

[Problems to be Solved by the Invention] However, in conventional diagnosis, each inquiry item from a user is processed equally, and processing that includes the passage of time is not supported. For example, in a conventional failure diagnosis device, in response to an inquiry from a user that includes the passage of time as shown in FIG. This method has the disadvantage that unnecessary causes and countermeasures are added to the diagnostic candidates, resulting in a decrease in the accuracy of the diagnostic results.

The present invention has been made to solve the above-mentioned problems, and its purpose is to improve the accuracy of failure diagnosis including the passage of time.

[0005]

[Means for Solving the Problems] In order to achieve this object, the fault diagnosis device of the present invention provides fault diagnosis information necessary for fault diagnosis, such as fault symptoms expressing the passage of time, causes of faults, countermeasures, etc. The present invention includes a time elapsed fault diagnosis information storage means for storing in association with each other, and a time elapsed inference means for inferring at least one of a cause and a countermeasure in consideration of the elapsed time.

The time-lapse failure diagnosis information storage means may be implemented as a function of the failure diagnosis information storage means. Further, the time elapse inference means may be implemented as a function of inference means for fault diagnosis.

[0007]

[Operation] With the input means of the present invention having the above-described configuration, a maintenance operator or a user inputs an inquiry about a malfunction from a user.

The failure diagnosis information storage means stores failure diagnosis information necessary for failure diagnosis, such as causes of failures and countermeasures, in association with failure symptoms. The time elapsed fault diagnosis information storage means stores fault symptoms and causes of the fault that express the elapsed time.
Fault diagnosis information necessary for fault diagnosis such as countermeasures is stored in correspondence.

The inference means infers at least one of a cause and a countermeasure corresponding to the fault inquiry input from the input means, based on the fault diagnosis information stored in the fault diagnosis information storage means. Further, the time elapse inference means infers the inquiry inputted from the input means, taking into account the elapsed time from the knowledge in the storage means. and,
The output means outputs the result of the inference.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will be described below with reference to the drawings.

The control device 10 of this failure diagnosis device is shown in FIG.
As shown, the CPU 12, ROM 14, first RAM
16, second RAM 17 and bus 1 connecting them
It is mainly a computer with 8. An input interface 20 is connected to the bus 18,
An input device 22 is connected to the input interface 20 . The input device 22 connects the mouse pointer 21,
The operator in charge of maintenance inputs inquiries from users of equipment targeted for maintenance support. Further, an output interface 28 is connected to the bus 18 , and a display device 32 is connected to the output interface 28 via a drive circuit 30 .

The first RAM 16 is a backup R whose memory contents do not disappear even when the power of the failure diagnosis device is turned off.
AM, and has a failure diagnosis information memory 40 and a time-lapse failure diagnosis information memory 42. In addition, the second RAM1
7 is provided with an inquiry memory 44, a failure cause memory 46, etc. together with a working memory.

The failure diagnosis information memory 40 stores the symptoms of failures that do not elapse over time, their causes, and their countermeasures in association with each other. In the time-lapse failure diagnosis information memory, symptoms of failures that occur over time, their causes, and countermeasures are stored in association with each other.

Furthermore, the ROM 14 stores a maintenance support program as shown in the flowchart shown in FIG.

Next, FIG. 3 shows the operation of this failure diagnosis device.
This will be explained with reference to FIG.

When the diagnosis start switch is pressed, the process shown in FIG. 3 is started, and first, the screen shown in FIG. 4 is displayed on the output device 32. This screen separately displays the time of occurrence, self-diagnosis information, failure symptoms, and the operation method you want to know. The maintenance operator responds to inquiries from users with the mouse pointer 2.
1 in any order. If the selected inquiry information has more detailed input items, a new selection screen (not shown) appears to prompt selection from there. At this time, in the case of an inquiry that involves a lapse of time as shown in FIG. 6, the operator consciously inputs information in the order of the lapse of time. Once all inquiries from the user have been input in this way, the user selects the input end switch with the mouse pointer and the inquiry input process ends (S1). The input inquiries are stored in the inquiry memory in the order in which they were input (S2).

[0017] Next, a selection screen (not shown) is displayed on the display device 32 indicating whether or not inference taking into account the passage of time is necessary, and the selection screen is selected using the mouse pointer 21 (S3).

[0018] When the passage of time is not considered, the RAM 16
The cause of the failure is searched from the failure diagnosis information memory 40 (S4). Furthermore, when considering the passage of time, a cause corresponding to the failure symptom is searched for in the information in the time-lapse failure diagnosis information memory 42 of the RAM 16, which has the same order as the inquiries stored in the inquiry memory 44 (S5). For example, when there is an inquiry in FIG. 5, the knowledge in FIG. 6 is not used, but the knowledge in FIG. 7 is used.

Finally, the answer to the inquiry is displayed on the display device 32 and the program ends (S6).

[0020] In this manner, the failure diagnosis device of this embodiment can answer inquiries over time with high accuracy.

As is clear from the above description, in this embodiment, the input device 22 constitutes an input means, the failure diagnosis information memory constitutes a failure diagnosis information storage means, a time elapsed failure diagnosis information storage means, The portion of the ROM 14 that stores S5 and S6 and the portion of the CPU 12 that executes these steps constitute an inference means and a time elapsed inference means, and the display device 32 constitutes an output means.

In this embodiment, the fault diagnosis information storage means and the time elapsed fault diagnosis information storage means are separated into a fault diagnosis information memory and a time elapsed fault diagnosis information memory, respectively, but in order to expand the cause candidates, It may be realized by one fault diagnosis information memory.

The present invention can be implemented with various modifications and improvements based on the knowledge of those skilled in the art without departing from the scope of the claims.

[0024]

As described above, the failure diagnosis apparatus of the present invention can make highly accurate inferences not only regarding failure complaints but also regarding symptoms that occur over time.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a failure diagnosis device of the present invention.

FIG. 2 is a block diagram showing a control device according to an embodiment.

FIG. 3 is a flowchart of an embodiment.

FIG. 4 is a diagram showing an example of an inquiry input screen.

FIG. 5 is a diagram showing an example of failure symptoms including the passage of time.

FIG. 6 is a diagram showing an example of failure diagnosis information including a spindle servo error.

FIG. 7 is a diagram showing an example of failure diagnosis information including time elapsed.

[Explanation of symbols]

10 Control device 12 CPU 14 ROM 16 First RAM 17 Second RAM 22 Input device 32 Display device

Claims (1)

[Claims] 1. An input means for inputting failure symptoms, etc., and a failure diagnosis information storage means for storing failure diagnosis information necessary for failure diagnosis, such as causes of failure and countermeasures, in association with the failure symptoms; an inference means for inferring at least one of a cause and a countermeasure corresponding to a fault inquiry input from the input means, based on the fault diagnosis information stored in the fault diagnosis information storage means, and outputting the result of the inference. In a fault diagnosis device having an output means for detecting the cause of the fault,
a time elapsed fault diagnosis information storage means for storing fault diagnosis information necessary for fault diagnosis, such as countermeasures, in association with fault symptoms that elapse over time; and a storage means for storing the symptoms inputted from the input means. 1. A failure diagnosis device comprising: time elapse inference means for inferring at least one of a cause and a countermeasure by considering the elapse of time from the knowledge of