JPS63257053A - Fault diagnosing system - Google Patents

Abstract

PURPOSE:To detect the faulty part of an equipment based on an abnormal tone and to rapidly and accurately diagnose a fault, by detecting the abnormal tone emitted from the equipment, and comparing the abnormal tone with that prepared in advance. CONSTITUTION:The abnormal tone S generating when the fault is generated at a prescribed part in the equipment is added on an abnormal tone input part 1, and is converted to an electrical signal, and furthermore, it is inputted to a comparing and detecting part 2. At the comparing and detecting part 2, the abnormal tone S from the abnormal tone input part 1 is compared with a sample abnormal tone S' stored in a sample abnormal tone data part 3 and prepared in advance, and the sample abnormal tone S' which resembles the abnormal tone remarkably is taken out. A faulty part inference part 4 detects the faulty part P corresponding to the sample abnormal tone S' based on the correspondent rule of a correspondent rule part 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a fault diagnosis method, and more particularly to a fault diagnosis method for detecting a fault location based on sound.

[Conventional technology]

In the field of failure diagnosis methods for diagnosing equipment failures, attempts have been made to apply artificial intelligence technology, and in particular, methods based on production rules have been widely used. A production rule is rule-type knowledge such as ``If A, then B'', and various inferences are made based on this rule.

In the conventional fault diagnosis method using such production rules, for example, a keyboard is used as an input means,
Instructions for troubleshooting work were given from the keyboard.

Incidentally, when equipment malfunctions, abnormal sounds are often generated, and by detecting the location of the failure based on the abnormal sounds, it is often possible to perform a more rapid and accurate failure diagnosis.

〔the purpose〕

SUMMARY OF THE INVENTION An object of the present invention is to provide a fault diagnosis method that can detect a fault location using abnormal sounds.

[Sawanari]

In order to achieve the object 1, the present invention provides an input means for inputting an abnormal sound, and compares the abnormal sound from the input means with a sample abnormal sound prepared in advance, and samples the abnormal sound most similar to the manually generated abnormal sound. The present invention is characterized by comprising a comparison detection means for detecting an abnormal sound, and an inference means for inferring a failure location from the detected sample abnormal sound.

Hereinafter, a detailed explanation will be given based on one embodiment of the present invention.

FIG. 1 is a block diagram of a fault diagnosis method according to the present invention. 1st
In the figure, an abnormal sound input section 1 receives an abnormal sound S from a device to be diagnosed. The abnormal sound input unit 1 is composed of, for example, a microphone, and converts sound into an electrical signal.

The abnormal sound input section 1 is connected to a comparison detection section 2.

A sample abnormal sound data section 3 is further connected to the comparison detection section 2 . The sample abnormal sound data section 3 stores all possible abnormal sounds S' of the equipment as data. When the abnormal sound S is added to the abnormal sound input section 1, the comparison detection section 2 detects that the π-character sound S is the sample abnormal sound data section 3.
It is designed to compare and detect which one of the abnormal sounds S' stored in the abnormal sound S' is.

The sample abnormal sound S' detected by the comparison detection section 2 is sent to the fault location inference section 4, and the fault location inference section 4 finds a fault location P corresponding to the sample abnormal sound S'. . In other words, the failure location inference unit 4
By referring to the correspondence rule section 5 between the sample abnormal sound S' and the failure location P, the failure location P corresponding to the sample abnormal sound S' is found.

In such a failure diagnosis method, an abnormal sound S may be generated when a predetermined part of the equipment fails.

This abnormal sound S is applied to the abnormal sound input section 1, converted into an electrical signal, and further inputted to the comparison detection section 2.

The comparison detection section 2 sequentially compares the abnormal sound S from the abnormal sound input section 1 with the sample abnormal sound S' stored in the sample abnormal sound data section 3, and selects a sample abnormality that is most similar to the abnormal sound S. I didn't take out the sound S'.

The sample abnormal sound S' detected in this way is sent to the fault location inference section 4. The failure point inference section 4 extracts the sample abnormal sound S' based on the correspondence rule of the correspondence rule section 5.
Detect the failure point P corresponding to .

The correspondence rules of the correspondence rule section 5 are composed of production rules as shown in FIG. 2, that is, the rule "If . . . then . . .".

Therefore, according to the example shown in FIG. 2, the failure location inference unit 4
If the sample abnormal sound S' is A, the fault location P is inferred to be A, and if the sample abnormal sound S' is B, the fault location P is inferred to be B or C.

In this manner, in this embodiment, a failure location can be detected and diagnosed using abnormal sounds.

In the above-mentioned embodiment, the abnormal sound S from the equipment is directly inputted manually to the abnormal sound manual unit 1. However, instead of this, the operator listens to the abnormal sound of the equipment and records a pre-recorded sample. The abnormal sounds may be generated sequentially, and the operator may select and input the abnormal sound that is considered to be the most similar.

〔effect〕

As described above, according to the present invention, the location of the failure is inferred from the detected abnormal sample sound, so that more rapid and accurate failure diagnosis can be performed. In addition, by combining this with conventional fault diagnosis procedures, it is possible to recover from a fault quickly.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a fault diagnosis method according to the present invention, and FIG. 2 is a diagram showing a specific example of a production rule in a corresponding rule section. 1... Abnormal sound input section, 2... Comparison detection section, 3...
Sample abnormal sound data section,

Claims (1)

[Claims] an input means for inputting an abnormal sound, a comparison detection means for comparing the abnormal sound from the input means with a sample abnormal sound prepared in advance, and detecting a sample abnormal sound most similar to the input abnormal sound; and inference means for inferring a fault location from sampled abnormal sounds.