Method and system for diagnosis of plant

• US 6,909,990 B2
• Filed: 02/12/2003
• Issued: 06/21/2005
• Est. Priority Date: 02/13/2002
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Okazaki, Mitsuyoshi, Asatsu, Seiichi, Watanabe, Shunzo
• Primary Examiner(s): Bui, Bryan
• Assistant Examiner(s): Washburn, Douglas N
• Application Number:
  US10/364,496
• Publication Number:
  US 20030154051A1
• Time in Patent Office: 860 Days
• Field of Search: 700/96, 700/108, 700/110, 700/1, 700/95, 702/182, 702/183, 702/184, 702/185, 702/188
• US Class Current: 702/183
• CPC Class Codes: G05B 23/0216 Human interface functionality, e.g. monitoring system providing help to the user in the selection of tests or in its configuration
• CPC Class Codes: G07C 3/00 Registering or indicating the condition or the working of machines or other apparatus, other than vehicles

Abstract

A plant diagnosis system friendly to a user (a plant-operating organization) for identifying an abnormality of an objective plant or machinery thereof, is provided. The plant diagnosis system includes a diagnoser'"'"'s sub-system including a diagnosis computer and a terminal for a diagnosis expert and is connected via a network to a user'"'"'s sub-system including a terminal for communicating with the diagnoser'"'"'s sub-system. The plant diagnosis system provides a simple but repetitively available primary diagnosis and a detailed secondary diagnosis including the expert'"'"'s judgement, which are selectively available on the user'"'"'s initiative. The diagnosis computer receives a diagnosis request and plant state variables of the plant or machinery and executes the primary diagnosis and a part of the secondary diagnosis based on the plant state valuables.

Claims

1. A plant diagnosis method, comprising steps to be executed by a diagnosis computer in a diagnoser'"'"'s unit, including:

a step of accepting a primary diagnosis request inputted from a terminal in a user'"'"'s unit,

a step of issuing a questionaire for urging the user to input necessary data for a primary diagnosis including characteristic symptoms of abnormality of an objective plant or machinery thereof, on accepting the primary diagnosis request,

a step of executing a primary diagnosis of the objective plant or machinery thereof based on the necessary data inputted by the user and optionally plant data sampled by a plant data collecting and processing means in the plant, to issue a primary diagnosis report,

wherein the primary diagnosis includes a primary diagnosis result indicating a possible cause of abnormality and means for allowing the user to select a repetition of the primary diagnosis as an alternative to means for requesting a secondary detailed diagnosis.

2. A plant diagnosis method according to claim 1, further comprising steps to be executed by the diagnosis computer in the diagnoser'"'"'s unit, including:

a step of accepting a secondary diagnosis request inputted from the terminal in the user'"'"'s unit having received the primary diagnosis result,

a step of accepting the secondary diagnosis request and a step of notifying an expert at the diagnoser'"'"'s unit of the secondary diagnosis request,

a step of accepting data collected by the expert, and

a step of executing a secondary diagnosis of the objective plant or machinery thereof based on the data collected by the expert to prepare a result of the secondary diagnosis.

3. A plant diagnosis method according to claim 2, further comprising:

a step of transmitting the secondary diagnosis result prepared by the secondary diagnosis to a terminal for the expert to have the expert make a final judgment, and

a step of transmitting an answer of the secondary diagnosis result based on the expert'"'"'s final judgment to the terminal in the user'"'"'s unit directly or via the diagnosis computer through a network.

4. A plant diagnosis method according to claim 2, wherein said plant data or the data collected by the expert is obtained from a plant data-collecting and -processing computer storing state variables of the objective plant or machinery thereof.

5. A plant diagnosis system, comprising a diagnoser'"'"'s unit including:

means for accepting a primary diagnosis request from a terminal in a user'"'"'s unit via a network,

means for issuing a questionaire for urging the user to input necessary data for a primary diagnosis including characteristic symptoms of abnormality of an objective plant or machinery thereof,

means for executing a primary diagnosis of the objective plant or machinery thereof based on the necessary data inputted by the user and optionally plant data sampled by a plant data collecting and processing means in the plant, to issue a primary diagnosis report,

wherein the primary diagnosis report includes a primary diagnosis result indicating a possible cause of abnormality and means for allowing the user to select a repetition of the primary diagnosis as an alternative to means for requesting a secondary detailed diagnosis.

6. A plant diagnosis system according to claim 5, further including:

means for accepting a secondary diagnosis request inputted from the terminal in the user'"'"'s unit having received the primary diagnosis result,

means for accepting the secondary diagnosis request and notifying an expert at a diagnoser'"'"'s unit of the secondary diagnosis request,

means for accepting data collected by the expert, and

means for executing a secondary diagnosis of the objective plant or machinery thereof based on the data collected by the expert.

7. A plant diagnosis system according to claim 6, further including:

means for transmitting the secondary diagnosis result to a terminal for the expert to have the expert make a final judgment, and

means for transmitting an answer of the secondary diagnosis result based on the expert'"'"'s final judgment to the terminal in the user'"'"'s unit via a network.

8. A plant diagnosis system according to claim 6, wherein said plant data or data collected by the expert is obtained from a plant data-collecting and -processing computer storing state variables of the objective plant or machinery thereof.

9. A plant diagnosis system according to claim 5, further including means for presenting abnormalities having occurred in the past at the objective plant or machinery thereof.

10. A plant diagnosis system according to claim 5, wherein the terminal in the diagnoser'"'"'s unit is connected to the terminal in the user'"'"'s unit so as to allow people at the terminals have a TV conference including an interrogatory process while commonly viewing an identical picture on monitors of the respective terminals by utilizing a TV conference support system.

11. A plant diagnosis system according to claim 5, further including means for counting the number of primary or/and secondary diagnosis, time of system utilization, or diagnosis time.

12. A plant diagnosis system according to claim 11, further including means for calculating service charges based on a result of the counting.

13. A plant diagnosis system, including:

a diagnoser'"'"'s sub-system, a user'"'"'s sub-system and a network connecting the diagnoser'"'"'s sub-system, a plant system including plant machinery and sensors for detecting physical state variables of the plant machinery thereof, and a network connecting the diagnoser'"'"'s sub-system with the user'"'"'s sub-system and the plant system,

said user'"'"'s sub-system comprising a terminal for communication with the diagnoser'"'"'s sub-system via the network,

said diagnoser'"'"'s sub-system comprising a diagnosis computer and a terminal for an expert;

wherein said diagnosis computer comprises;

means for accepting a primary diagnosis request from a terminal in a user'"'"'s unit via the network,

means for issuing a questionaire for urging the user to input the necessary data for a primary diagnosis including characteristic symptoms of abnormality of an objective plant or machinery thereof,

means for executing a primary diagnosis of the objective plant or machinery thereof based on the necessary data inputted by the user and optionally plant data sampled by a plant data collecting and processing means in the plant, to issue a primary diagnosis report,

wherein the primary diagnosis report includes a primary diagnosis result indicating a possible cause of abnormality and means for allowing the user to select a repetition of the primary diagnosis as an alternative to means for requesting a secondary detailed diagnosis.

14. A plant diagnosis system according to claim 13, wherein the diagnosis computer further includes:

means for accepting a secondary diagnosis request inputted from the terminal in the user'"'"'s unit having received the primary diagnosis result,

means for accepting the secondary diagnosis request and notifying an expert at a diagnoser'"'"'s unit of the secondary diagnosis request,

means for accepting data collected by the expert, and

means for executing a secondary diagnosis of the objective plant or machinery thereof based on the data collected by the expert.