JPH0593505A - Diagnosing device for cause of abnormality in boiler - Google Patents

Abstract

PURPOSE:To provide a diagnosing device for cause of abnormalities in boiler by which the cause of abnormalities can be diagnosed without entailing a large burden such as memory expansion to the microcomputer on the side of a boiler and assembly of a knowledge base in the computer. CONSTITUTION:In a boiler which carries out control of operation by connecting a microcomputer on the side of the boiler and computer on the side of a control station, contents of abnormalities and data on the conditions of various devices that are recorded in an abnormality content judgement program 12 of the compute 11 on the boiler side are sent to the computer 21 on the control station side. Based on the knowldge base 22 of diagnosing cause of abnormalities in the computer 11 on the boiler side inference of cause of abnormalities is made by an inference engine 23, and the results of this inference are sent to the microcomputer 11 on the boiler side, and the inferred caused of an abnormality is displayed on a display device 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for diagnosing an abnormality in a boiler, and more particularly to an apparatus for diagnosing an abnormality in a boiler that can analyze the details of an abnormality that has occurred in the boiler and diagnose the cause of the abnormality.

[0002]

2. Description of the Related Art Conventionally, it has been practiced to control a boiler by using a microcomputer and to determine the content of the abnormality when the abnormality occurs. However, the microcomputer attached to the boiler side has cost and functional restrictions, and mainly discriminates the contents of abnormality by simple condition judgment.

[0003]

Even if an artificial intelligence (AI) is constructed in a conventional boiler, it is impossible to have a large memory space in the knowledge base and the inference engine, and only a simple abnormality diagnosis can be actually performed. Was the reality. Further, the abnormality determination algorithm is composed of only simple condition determination and is stored in a ROM as a program, and there is a drawback that the algorithm cannot be corrected due to an abnormality record in actual operation.

The present invention has been made in view of the above-mentioned circumstances, and its object is to diagnose the cause of an abnormality without imposing a large burden on the microcomputer on the boiler side such as adding memory or incorporating a knowledge base. Another object of the present invention is to provide an abnormality cause diagnostic device for a boiler, which can improve the maintainability and shorten the time until the operation is restored.

[0005]

In order to achieve the above object, the apparatus for diagnosing an abnormality in a boiler according to the present invention is a boiler for performing operation management by connecting a microcomputer on the boiler side and a computer on the management station. The abnormality content recorded in the abnormality content determination program of the side microcomputer, the data of the state of each device is sent to the management station side computer, based on the abnormality cause diagnosis knowledge base of the management station side computer,
The inference engine infers the cause of the abnormality, sends the inference result to the boiler side microcomputer, and displays the inferred cause of the abnormality on the display device.

[0006]

[Operation] In the boiler side microcomputer, data at the time of occurrence of an abnormality (contents of abnormality, state of each device in past (up to several minutes before occurrence of abnormality), can water data, oil pressure, etc. are recorded, When an abnormality occurs, this data is sent to the management station computer. A knowledge base of the cause of abnormality based on past operation records is prepared in advance on the computer on the management station side, and the inference engine is activated by this knowledge base and the data sent to infer the cause of abnormality.
This inference result is returned to the boiler side microcomputer,
The cause of this abnormality is displayed on the display device of the boiler side microcomputer. As a result, the cause of abnormality can always be diagnosed based on the latest knowledge base, and the boiler side can be realized with almost no burden on the boiler side such as the addition of memory. In addition, a single computer on the management station side can diagnose multiple boilers.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a boiler abnormality cause diagnosis apparatus according to the present invention will be described below with reference to the drawings.

A boiler side microcomputer 11 is incorporated in the boiler 1. The boiler side microcomputer 11 determines the abnormality content, the abnormality content at that time, the occurrence date and time, the state of each device for a limited period (usually 1 to 2 minutes) immediately before the occurrence of the abnormality, and boiler water data. , An abnormality content determination data recording program 12 for recording oil pressure, load, etc., a RAM 13 for storing it, a communication program 14 for sending this data to the management station and receiving an inference result from the management station side, and this inferred abnormality A display program 15 for displaying the cause and a display device 16 are incorporated.

On the other hand, the computer 2 on the management station side
1 is past operation record (not limited to the boiler)
Error content and status of each equipment, boiler can water data,
Knowledge base for abnormality diagnosis based on hydraulic pressure, load, etc. 22
, An inference engine 23 that performs inference, and a communication program 24 that receives data from the boiler side and transmits the inference result to the boiler side.

First, on the boiler side, during operation, the state of each device is recorded in a trendy manner, and when an abnormality occurs, the details of the abnormality, the state of each equipment from 1 to 2 minutes before the occurrence, and the boiler can. Water data, oil pressure, load, etc. are sent to the management station via communication line (telephone line, etc.). Upon receipt of this abnormal data, the management station once records it in an external storage device and activates an inference engine 23 based on this data and the abnormality cause diagnosis knowledge base 22 to infer the cause of the abnormality. Then, this inference result (abnormality cause diagnosis result) is sent to the communication program 24, and the data is sent to the boiler side.
When the boiler side receives this diagnostic result data, it sends this data to the abnormality cause display program 15, and the abnormality cause display program 15 displays this data on the display device 16.

Of course, the management station may separately output the inference result to the printer 25 or the like and leave it as an abnormal history.

The boiler side display device 16 and the RAM 1
The third grade is always necessary, and is not newly added to realize this function.

[0013]

As is apparent from the above description, the apparatus for diagnosing an abnormality in a boiler according to the present invention is capable of diagnosing the cause of an abnormality without adding a large amount of memory to the microcomputer on the boiler side or incorporating a knowledge base. Therefore, it is possible to improve the maintainability of the boiler and shorten the time until the operation is restored.

Further, according to the present invention, the abnormality cause diagnosis knowledge base in the microcomputer on the management station side can be easily and appropriately changed, and a diagnosis more suitable for the actual results can be performed.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of an embodiment of an abnormality cause diagnostic device for a boiler according to the present invention.

[Explanation of symbols]

 1 Boiler 11 Boiler side microcomputer 12 Abnormality content discrimination data recording program 13 RAM 14 Communication program 15 Display program 16 Display device 21 Management station side computer 22 Knowledge base 23 Inference engine 24 Communication program 25 Printer

Claims (1)

[Claims] 1. In a boiler for operating management by connecting a microcomputer on the boiler side and a computer on the management station side, the abnormality content recorded in an abnormality content discriminating program of the boiler side microcomputer and the data of the state of each device are described above. It is sent to the computer on the management station side, the reason for the abnormality is inferred by the inference engine based on the abnormality cause diagnosis knowledge base of the computer on the management station side, the inference result is sent to the microcomputer on the boiler side, and the inferred abnormality is displayed on the display device. An apparatus for diagnosing the cause of an abnormality in a boiler, which is configured to display the cause.