Apparatus and method of diagnosing machinery damage factor

• US 6,922,657 B2
• Filed: 04/24/2003
• Issued: 07/26/2005
• Est. Priority Date: 04/25/2002
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Murakami, Masanori, Okazaki, Mitsuyoshi, Asatsu, Seiichi
• Primary Examiner(s): Bui, Bryan
• Assistant Examiner(s): Dougherty, Anthony T.
• Application Number:
  US10/421,784
• Publication Number:
  US 20030204333A1
• Time in Patent Office: 824 Days
• Field of Search: 702/183, 702/184, 702/185
• US Class Current: 702/183
• CPC Class Codes: G01H 1/006 of the rotor of turbo machines

Abstract

A vibration diagnosis is performed by using a vibration mode interactive query section grasping vibration event of a machinery such as turbine rotor and characteristic feature thereof from detected data information, a vibration factor diagnosis section estimating a vibration factor based on the information from the vibration mode interactive query section, and a diagnosis result display section indicating the estimated vibration factor and a guidance for countermeasure to be taken against the vibration factor.

Claims

1. An apparatus for diagnosing a damage factor of machinery, comprising:

a machinery damage mode interactive query section configured to determine a damage factor event of the machinery and a characteristic feature thereof from input information;

a machinery damage factor diagnosis section configured to estimate a damage factor based on the information from the machinery damage mode interactive query section; and

a diagnosis result display section configured to indicate the estimated damage factor and a guidance for countermeasure to be taken against the damage factor,

wherein said machinery damage factor diagnosis section includes a diagnosis matrix section including several small matrices featuring a plurality of machinery damage factors based on the damage factor event, the characteristic feature, and damage generated conditions, and a diagnosis engine section configured to generate one matrix by collecting several small matrices; and

said diagnosis engine section is configured to multiply an answering rate to query items of the damage mode interactive query section and a matching rate to an answer when all damage factors are set as 100%, and to miltiply a correction coefficient so as to calculate a damage probability.

2. The apparatus for diagnosing damage factor of machinery according to claim 1, wherein said diagnosis matrix section is configured to generate a matrix table on the basis of the machinery damage factors having direct relation to the damage factor event and feature, and to give a weighing point to an intersection portion of the table in accordance with a relation of the damage factor with respect to the damage factor event and feature.

3. The apparatus for diagnosing damage factor according to claim 1, wherein said diagnosis engine section is configured to assign minus points to the damage factor event and feature having low damage factor probability in the matrix table.

4. The apparatus for diagnosing damage factor according to claim 1, wherein said diagnosis engine section is configured to stepwise a damage probability based on the damage factor probability and a predetermined threshold value with respect to each damage factor.

5. The apparatus for diagnosing damage factor according to claim 1, wherein said diagnosis engine section is configured stepwise determine the damage factor at three grades, that is, “

damage possibility is high”

, “

there is a possibility of damage”

, and “

there is no possibility of damage”

.

6. The apparatus for diagnosing damage factor according to claim 1, wherein said damage factor is a vibration factor.

7. A method of diagnosing a damage factor, comprising:

selecting an answer to prepared query items based on data information given;

estimating a damage factor on the basis of the selected answer;

weighing the estimated damage factor;

collecting an answering rate and a matching rate of the weighed damage factor;

calculating a damage factor probability by multiplying a correction coefficient by both the answering rate and the matching rate of the damage factor; and

indicating a guidance for taking suitable course against the calculated damage factor probability.

8. The method of diagnosing a damage factor according to claim 7, wherein said damage factor is a vibration factor.

9. A system for diagnosing a damage factor, comprising:

means for selecting an answer to prepared query items based on data information given;

means for estimating a damage factor on the basis of the selected answer;

means for weighing the estimated damage factor;

means for collecting an answering rate and a matching rate of the weighed damage factor;

means for calculating a damage factor probability by multiplying a correction coefficient by both the answering rate and the matching rate of the damage factor; and

means for indicating a guidance for taking suitable course against the calculated damage factor probability.

10. The system of claim 9, wherein the means for estimating comprise:

means for estimating a vibration factor based on the selected answer.