Knowledge-forming apparatus and parameter-retrieving method as well as program product

• US 20060161391A1
• Filed: 10/11/2005
• Published: 07/20/2006
• Est. Priority Date: 10/08/2004
• Status: Abandoned Application

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: Inaba, Hironori, Hirayama, Yuji, Kojitani, Kazuto
• Application Number:
  US11/248,025
• Publication Number:
  US 20060161391A1
• Time in Patent Office: Days
• US Class Current: 702/183
• CPC Class Codes: G06F 11/2257 using expert systems
• CPC Class Codes: G07C 5/0808 Diagnosing performance data testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005

Abstract

A device that is capable of easily determining discrimination knowledge suitable for recognizing a normal/abnormal state of an object to be inspected in an inspecting and diagnosing apparatus is provided with: a parameter-retrieving unit that retrieves various parameter sets used for calculating feature amounts, a feature-amount operation unit that calculates a plurality of feature amounts based upon the respective parameter sets that have been retrieved by the retrieving unit in association with learning data that includes given normal data and abnormal data, a primary evaluation unit that outputs the effectiveness of each of the parameter sets as evaluated values based upon the results of the operation of the feature amounts calculated by the feature-amount operation unit, an optimal solution candidate output unit that, based upon the results of the primary evaluation found by the primary evaluation unit, outputs the results of a plurality of parameter sets having a high primary evaluated value as a plurality of optimal solution candidates, a discrimination knowledge forming unit that forms a plurality of discrimination knowledge based upon the optimal solution candidates output from the optimal solution candidate output unit, a secondary evaluation unit that evaluates on each of the discrimination knowledge that have been formed in the discrimination knowledge forming unit and an optimal solution output unit that, based upon the results of the secondary evaluation, outputs the discrimination knowledge having a high evaluated value as an optimal solution.

Claims

1. A knowledge forming apparatus, which is used in an inspecting and diagnosing apparatus for determining whether an object to be inspected is normal or abnormal and finds discrimination knowledge suitable for the object based upon feature-amount data obtained by carrying out a feature-amount extracting process on measured data acquired, comprising:

a retrieving unit that retrieves a plurality of parameter sets used for calculating feature amounts;

a feature-amount operation unit that calculates a plurality of feature amounts based upon respective parameter sets that have been retrieved by the retrieving unit, in association with learning data containing given normal data and abnormal data;

a primary evaluation unit that outputs an effectiveness of respective parameter sets as an evaluated value based upon results of an operation of the feature amounts calculated by the feature-amount operation unit;

an optimal solution candidate output unit that, based upon results of a primary evaluation found by the primary evaluation unit, outputs a plurality of parameter sets having a high primary evaluated value as a plurality of optimal solution candidates;

a discrimination knowledge forming unit that forms a plurality of discrimination knowledge based upon the optimal solution candidates output from the optimal solution candidate output unit;

a secondary evaluation unit that evaluates respective discrimination knowledge that have been formed in the discrimination knowledge forming unit; and

an optimal solution output unit that, based upon the results of the secondary evaluation, outputs a discrimination knowledge having a high evaluated value as an optimal solution.

2. The knowledge forming apparatus according to claim 1, wherein the retrieving unit again retrieves respective parameter sets based upon results of evaluation in the primary evaluation unit so that effective feature amounts having a high evaluated value and the respective parameter sets of the effective feature amount are simultaneously determined.

3. The knowledge forming apparatus according to claim 1, wherein with respect to a group of feature amounts that have the same parameter or parameters in the parameter sets, the primary evaluation unit outputs a weighted sum with weights as a primary evaluated value by using weights that are set in respective feature amounts.

4. The knowledge forming apparatus according to claim 3, wherein the primary evaluation unit is capable of calculating a plurality of primary evaluated values with respect to one of the respective parameter sets, by using a plurality of patterns of weights that are set for each of the feature amounts.

5. The knowledge forming apparatus according to claim 1, wherein the primary evaluation unit is capable of calculating a plurality of primary evaluated values with respect to one of the parameter sets by using a plurality of kinds of evaluation expressions.

6. The knowledge forming apparatus according to claim 1, wherein a retrieval area specifying unit that specifies an area which is retrieved by the retrieving unit.

7. A discrimination knowledge forming method for a knowledge forming apparatus which is used in an inspecting and diagnosing apparatus for determining whether an object to be inspected is normal or abnormal and finds discrimination knowledge suitable for the object based upon feature-amount data obtained by carrying out a feature-amount extracting process on measured data acquired, comprising the steps of:

retrieving a plurality of parameter sets that are used for calculating feature amounts;

calculating a plurality of feature amounts based upon respective parameter sets that have been retrieved, in association with learning data containing given normal data and abnormal data;

calculating a primary evaluated value indicating an effectiveness of each of the parameter sets based upon results of an operation of the feature amounts calculated by the feature-amount operation unit;

based upon the primary evaluated value, again retrieving the respective parameter sets to repeatedly execute calculations of the feature amounts and calculations of evaluated values based upon the respective parameter sets that have been retrieved;

based upon primary evaluated values upon satisfying retrieving completion conditions that have been set, determining a plurality of parameter sets as a plurality of optimal solution candidates,

based upon the optimal solution candidates, forming a plurality of discrimination knowledge; and

executing a secondary evaluation for each of the plurality of discrimination knowledge, based upon the results of the secondary evaluation, the discrimination knowledge having a high evaluated value is determined as an optimal solution.

8. The discrimination knowledge forming method according to claim 7, wherein, in the case when results of the secondary evaluation have failed to satisfy completion conditions, the process is again executed from the step of retrieving parameter sets.

9. The discrimination knowledge forming method according to claim 7, wherein, in a case when results of the secondary evaluation have failed to satisfy completion conditions, upon again executing the process from the step of retrieving parameter sets, parameter sets, which have been used upon forming discrimination knowledge having a high secondary evaluations, are given to a retrieving unit as at least some initial parameter sets.

10. A computer-implemented method, which is used in an inspecting and diagnosing apparatus for determining whether an object to be inspected is normal or abnormal and finds discrimination knowledge suitable for the object based upon feature-amount data obtained by carrying out a feature-amount extracting process on measured data acquired, comprising a program portion for executing the processes of:

causing a retrieving unit to retrieve a plurality of parameter sets that are used for calculating feature amounts;

allowing a feature-amount operation unit to calculate a plurality of feature amounts based upon respective parameter sets that have been set, in association with learning data containing given normal data and abnormal data;

calculating primary evaluated values indicating effectiveness of each of the parameter sets based upon results of an operation of the feature amounts calculated by the feature-amount operation unit;

based upon the primary evaluated values, again retrieving the parameter sets to repeatedly execute calculations of the feature amounts and calculations of the primary evaluated values based upon the respective parameter sets;

based upon the primary evaluated values upon satisfying retrieving completion conditions that have been set, determining a plurality of parameter sets as a plurality of optimal solution candidates so that a plurality of discrimination knowledge are formed based upon optimal solution candidates;

executing a secondary evaluation on each of the discrimination knowledge; and

based upon results of the secondary evaluation, discrimination knowledge having a high evaluated value is determined as an optimal solution.