Order analysis system

• US 10,094,743 B2
• Filed: 03/14/2016
• Issued: 10/09/2018
• Est. Priority Date: 03/14/2016
• Status: Active Grant

• Current Assignee: epro GmbH (Emerson Electric Company)
• Original Assignee: epro GmbH (Emerson Electric Company)
• Inventors: Holtmannspotter, Hermann, Holtmannspotter, Matthias, Wewers, Thomas
• Primary Examiner(s): Ho, Anthony
• Application Number:
  US15/069,040
• Publication Number:
  US 20170261404A1
• Time in Patent Office: 939 Days
• Field of Search: 702182
• CPC Class Codes: G01M 7/00 Vibration-testing of structures; Shock-testing of structures G01M9/00 takes precedence
• CPC Class Codes: G01M 99/005 Testing of complete machines, e.g. washing-machines or mobile phones testing of machine parts G01M13/00; testing of electric apparatus or components G01R31/50
• CPC Class Codes: G07C 3/02 Registering or indicating working or idle time only
• CPC Class Codes: H03H 17/0251 Comb filters

Abstract

An instrument for performing order analysis on a rotational machine. An input module receives periodic motion data, and machine characteristic data that is associated by time with the periodic motion data. A processor module receives the periodic motion data and the machine characteristic data, applies a Goertzel module to the periodic motion data and the machine characteristic data, and thereby creates an order data set comprising magnitude of machine characteristic data versus order of normalized periodic motion data.

Claims

1. An instrument for performing order analysis on a machine, the instrument comprising:

a speed detection module for detecting a speed of a periodically moving member of a machine and providing a speed signal,

a sensing module for detecting at least one of sound and vibration and providing a machine signal,

an input module for receiving the speed signal and the machine signal,

a memory for holding the speed signal as speed data and the machine signal as machine data,

a measurement module comprising a Goertzel module for using the speed data to perform a selective frequency extraction from the machine data and providing an order data set,

an alarm module for receiving the order data set and comparing the order data set to at least one of a standard and a limit, and when at least one of the standard and limit is violated, outputting a signal with an indication of the violation,

a user interface comprising a display for presenting information to a user,

a communication module for communicating between the instrument and other computing systems, and

a processor module for,

controlling the measurement module to apply the Goertzel module to the speed data and the machine data,

creating from the order data set at least one of a polar representation and a complex representation of machine data versus order of normalized periodic motion data, and

presenting the polar representation to the user as a graph on the display, the graph including magnitude and phase of an order of the periodic motion data, with regions for alert and danger sections.

2. The instrument of claim 1, wherein the polar representation comprises a circle representing 360 degrees of rotation of an element of the machine, a directional indicator at the center of the circle representing a thrust vector, a first wedge disposed within the circle representing a safe operation zone for the machine, and a second wedge disposed within the circle representing violation of at least one of the standard and the limit.

3. The instrument of claim 1, wherein the complex representation of the order data set comprises at least one of real and imaginary parts of machine characteristic data.

4. The instrument of claim 1, wherein the representation of the order data set comprises a graph of magnitude of machine characteristic data versus normalized periodic motion data.