Analysis of condition monitoring information

• US 7,305,326 B2
• Filed: 02/01/2006
• Issued: 12/04/2007
• Est. Priority Date: 08/21/2003
• Status: Active Grant

• Current Assignee: Computational Systems Incorporated (Emerson Electric Company)
• Original Assignee: CSI Technology Incorporated (Emerson Electric Company)
• Inventors: Hayzen, Anthony J., Garvey, Raymond E., Piety, Kenneth R., Carey, Andrew
• Primary Examiner(s): Barlow; John
• Assistant Examiner(s): SIEVERS, LISA C
• Application Number:
  US11/345,457
• Publication Number:
  US 20060161397A1
• Time in Patent Office: 671 Days
• Field of Search: 702/185
• US Class Current: 702/185
• CPC Class Codes: G01N 15/02 Investigating particle size or size distribution by measuring osmotic pressure G01N7/10; investigating sedimentation of particle suspensions G01N15/04; investigating individual particles G01N15/10

Abstract

A method is disclosed for acquisition and analysis of condition monitoring data. Alarm and alert limits are set to proper levels and information regarding the frequency and cause for alerts is collected. Analysis of the information may then be performed to provide a user with easily understandable representations of the system errors and suggested actions.

Claims

1. A method for assisting a user in analyzing condition monitoring information from at least one device, the method comprising the steps of:

collecting a plurality of samples of condition monitoring data for one or more parameters over time for at least one device, wherein the condition monitoring data includes one or more parameter measurements;

identifying one or more parameters at warning status based on the plurality of samples, wherein a parameter is at warning status when the parameter measurement is the same as or greater than a predetermined warning limit;

determining a mean time between warnings for the at least one device, wherein the mean time between warnings for the at least one device is an average time between collections of samples where at least one parameter is at warning status; and

displaying information comprising at least one of the mean time between warnings for the at least one device, a mean time between warnings for individual parameters, and a number of samples collected.

2. The method of claim 1, wherein the warning status is an alert status and the warning limit is an alert limit.

3. The method of claim 1, wherein the warning status is an alarm status and the warning limit is an alarm limit.

4. The method of claim 1, further comprising a step of identifying potentially faulty devices based on the devices having a smallest mean time between warnings.

5. The method of claim 1, further comprising a step of determining a frequency of maintenance for the at least one device based on the mean time between warnings for the at least one device.

6. The method of claim 5 wherein the frequency of maintenance is a percentage of the mean time between warnings for the at least one device.

7. The method of claim 5 wherein the frequency of maintenance is determined only for devices for which a sufficient number of samples has been collected.

8. The method of claim 1, wherein the displaying step includes displaying information comprising an overall average of the parameter measurements and averages of the parameter measurements for at least one period of time.

9. The method of claim 8 wherein the displayed averages are normalized averages.

10. The method of claim 8 wherein the displaying step comprises displaying a graphical representation of the averages of the parameter measurements for at least one period of time.