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Health management system, fault diagnosis system, health management method, and fault diagnosis method

  • US 9,933,338 B2
  • Filed: 10/30/2014
  • Issued: 04/03/2018
  • Est. Priority Date: 11/01/2013
  • Status: Active Grant
First Claim
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1. A fault diagnosis computer system for diagnosing a fault of mechanical equipment, comprising:

  • a processor; and

    a memory storing instructions that, when executed by the processor, cause the computer system to;

    acquire as time-series data, sensor data from a plurality of sensors installed in the mechanical equipment, or the sensor data and environmental data indicating an installation environment of the mechanical equipment;

    calculate a multi-dimensional vector extending from a normal state to a fault state of the mechanical equipment by a statistical method using the time-series data as learning data;

    estimate an equipment state or health state of the mechanical equipment using the multi-dimensional vector;

    detect whether a starting point position of the multi-dimensional vector changes by a predetermined value or more to determine a recovery effect of a maintenance work on the health state, wherein the multi-dimensional vector is calculated from time-series data in a period before and after the maintenance work is performed on the mechanical equipment;

    extract from the time-series data, sensor data that contributes to the change in the starting point position of the multi-dimensional vector;

    analyze changes in health state based on the time-series data on the health state to determine an estimated time period from a present time to an estimated time at which the health state decreases below a predetermined threshold;

    determine a time at which maintenance work is to be next conducted based on the estimated time period received and the recovery effect of the maintenance work on the health state received;

    display the extracted sensor data as an index indicating the health state of the mechanical equipment; and

    direct performance of maintenance work,wherein the environmental data, if included in the time-series data, includes at least one type of data among event data indicating an operation state of the mechanical equipment, operation data indicating an operation time of the mechanical equipment, load data indicating a load state of the mechanical equipment, and maintenance history data indicating a history of the maintenance work of the mechanical equipment.

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