Diagnostic vibration data collector and analyzer

• US 6,484,109 B1
• Filed: 05/13/1999
• Issued: 11/19/2002
• Est. Priority Date: 05/20/1998
• Status: Expired due to Term

• Current Assignee: Azima Holdings Incorporated (Fortive Corp.)
• Original Assignee: Dli Engineering Corporation (Fortive Corp.)
• Inventors: Lofall, Dean A.
• Primary Examiner(s): Hilten, John S.
• Assistant Examiner(s): PRETLOW, DEMETRIUS R
• Application Number:
  US09/311,828
• Time in Patent Office: 1,286 Days
• Field of Search: 702/56, 702/181, 702/82, 702/122, 736/60, 735/92, 737/78, 731/84, 731/22, 73/18.2, 73/350.9, 735/70, 736/44
• US Class Current: 702/56
• CPC Class Codes: G01H 1/003 of rotating machines G01H1/10 takes precedence

Abstract

A diagnostic vibration data collector and analyzer which incorporates an expert system within a portable computer such as a laptop or notebook type computer. The expert system analyzes vibration data acquired via a sensor coupled to the collector/analyzer in order to diagnose a condition of a machine under test. Several collector/analyzers may form part of a system in which peer to peer replication of data and information is performed so as to obviate the need for a central host computer and/or data base. Such system may include one or more stationary computers also serving as peers.

Claims

1. In an environment including a plurality of machines which are to undergo predictive maintenance, a system for performing predictive maintenance comprising:

a plurality of portable data collector/analyzers operatively configured to communicate with one another; and

at least one medium for permitting the plurality of portable data collector/analyzers to communicate with one another at least periodically,

wherein each of the portable data collector/analyzers comprises;

a transducer for being attached to a machine included among the plurality of machines, and for producing an output signal indicative of vibration of the machine;

circuitry for conditioning the output signal and converting it to vibration data;

a memory having a database stored therein, the database including vibration data obtained from the plurality of machines; and

a database replication engine for replicating data in the database with data in the database of each of the other of the plurality of portable data collector/analyzers, via the at least one medium.

2. The system of claim 1, wherein each portable data collector/analyzer includes a user input which allows a user to add machines to a list of machines stored in the database, and the database replication engine replicates the list of machines in the database with the list of machines in each of the other of the plurality of portable data collector/analyzers.

3. The system of claim 1, wherein the database replication engines of the plurality of portable data collector/analyzers are operative to maintain generally identical data content within each database.

4. The system of claim 1, wherein each of the plurality of portable data collector/analyzers further comprises a diagnostic system for analyzing vibration data obtained from the plurality of machines.

5. The system of claim 4, wherein for a given one of the plurality of portable data collector/analyzers, the diagnostic system included therein analyzes vibration data obtained via the transducer included in the given portable vibration data collector/analyzer based on vibration data obtained from others of the plurality of portable vibration data collector/analyzers via the database replication engine included in the given portable vibration data collector/analyzer.

6. The system of claim 4, wherein results of the vibration data analysis are stored in the database and are included in the data replicated by the database replication engine.

7. The system of claim 1, wherein the database replication engines included in the plurality of portable vibration data collector/analyzers are configured to carry out peer to peer replication of the respective databases.

8. The system of claim 1, wherein the database replication engines perform data replication asynchronously.

9. The system of claim 1, further comprising at least one desktop device including a database and a database replication engine for replicating the contents of the desktop device database with those of the databases of the plurality of portable data collector/analyzers.

10. The system of claim 1, wherein the at least one medium includes at least one of a hardwire connection, an RF connection, an infrared connection, and an Internet connection.

11. In an environment including a plurality of machines which are to undergo predictive maintenance, a method for performing predictive maintenance comprising the steps of:

employing a plurality of portable data collector/analyzers to collect vibration data from the plurality of machines, and storing vibration data collected locally by each of the plurality of portable data collector/analyzers in a corresponding database included in each of the plurality of portable data collector/analyzers; and

at least periodically replicating the data included each database of the plurality of portable data collectors with the data included in each database of the others of the plurality of portable data collectors.

12. The method of claim 11, further comprising the step of allowing a user of each portable data collector/analyzer to add machines to a list of machines stored in the database, and wherein the step of replicating includes replicating the list of machines in the database with the list of machines in each of the other of the plurality of portable data collector/analyzers.

13. The method of claim 11, wherein the step of replicating is operative to maintain generally identical data content within each database.

14. The method of claim 11, wherein each of the plurality of portable data collector/analyzers further comprises a diagnostic system for analyzing vibration data obtained from the plurality of machines, and further comprising the step of analyzing the vibration data via the diagnostic system.

15. The method of claim 14, wherein for a given one of the plurality of portable data collector/analyzers, using the diagnostic system included therein to analyze vibration data obtained via the given portable vibration data collector/analyzer, based on vibration data obtained from others of the plurality of portable vibration data collector/analyzers as a result of the step of replicating.

16. The method of claim 14, further including the step of storing results of the vibration data analysis in the database and replicating the results in the other of the portable vibration data collector/analyzers as part of the step of replicating.

17. The method of claim 11, wherein the step of replicating utilizes peer to peer replication among the plurality of portable data collector/analyzers.

18. The method of claim 11, wherein the replication is carried out asynchronously in the step of replicating.

19. The method of claim 11, further including the step of using at least one desktop device including a database and a database replication engine to replicate the contents of the desktop device database with those of the databases of the plurality of portable data collector/analyzers.

20. The method of claim 11, wherein the step of replicating is carried out between the plurality of portable data collector/analyzers by at least one of a hardwire connection, an RF connection, an infrared connection, and an Internet connection.

21. A portable data collector/analyzer, comprising:

a transducer for being attached to a machine in order to produce an output signal indicative of vibration of the machine;

circuitry for conditioning the output signal and converting it to vibration data;

a memory having a database stored therein, the database including vibration data obtained from the machine; and

a database replication engine for replicating data in the database with data in a database of each of a plurality of other portable data collector/analyzers.