Patents Assigned to SKF Condition Monitoring
-
Publication number: 20080033669Abstract: A cyclic time averaging method is directed at processing time-domain vibration data of the machine to produce an averaged time waveform over a selected cyclic time period. It is not necessary to employ a triggering signal to obtain the averaged time waveform.Type: ApplicationFiled: October 17, 2007Publication date: February 7, 2008Applicant: SKF Condition Monitoring, Inc.Inventor: Johannes Boerhout
-
Patent number: 7289919Abstract: A cyclic time averaging method is directed at processing time-domain vibration data of the machine to produce an averaged time waveform over a selected cyclic time period. It is not necessary to employ a triggering signal to obtain the averaged time waveform.Type: GrantFiled: July 30, 2004Date of Patent: October 30, 2007Assignee: SKF Condition Monitoring Inc.Inventor: Johannes I. Boerhout
-
Patent number: 6792360Abstract: Systems and methods for identifying the presence of a defect in vibrating machinery. An exemplary method comprises analysis of frequency spectrum vibration data of the machine. The method comprises deriving a harmonic activity index based on estimates of the energy associated with the frequency spectrum and the energy associated with the defect's harmonic series. The method may comprise deriving a value K by estimating a value M indicative of the energy of the defect's harmonic series and dividing M by the number of spectral lines corresponding to the defect's harmonic series. The method may further comprise deriving a value R by estimating a value Q indicative of the energy in the frequency spectrum data and dividing Q by the number of spectral lines of the frequency spectrum data. The method further comprises deriving the harmonic activity index based on the estimated K and R. Related systems for executing the methods are also disclosed.Type: GrantFiled: December 4, 2002Date of Patent: September 14, 2004Assignee: SKF Condition Monitoring, Inc.Inventors: Adrianus J. Smulders, Jim J. Wei, Johannes I. Boerhout
-
Patent number: 6789025Abstract: The condition of a machine is monitored with cyclic time averaging, a technique of allocating vibration energy to particular sources in a complex signal. The cyclic time averaging method is directed at processing time-domain vibration data of the machine to produce an averaged time waveform over a selected cyclic time period. Utilizing cyclic time averaging, the systems and methods analyze machine vibration signals to detect and evaluate specific sources of enemy contribution to the vibration energy of the machine. It is not necessary to employ a triggering signal to obtain the averaged time waveform.Type: GrantFiled: December 4, 2002Date of Patent: September 7, 2004Assignee: SKF Condition Monitoring, Inc.Inventor: Johannes I. Boerhout
-
Patent number: 6633822Abstract: A vibration data processor and processing method uses a frequency domain filter having low pipeline delay and accurate time domain signal reconstruction. The filter may be user configurable, and the filter may receive input data from a variable number of decimation stages. Sequences of extracted vibrational features are routed to a variable length output buffer for event detection.Type: GrantFiled: July 23, 2001Date of Patent: October 14, 2003Assignee: SKF Condition MonitoringInventors: Philip L. Maness, Johannes I. Boerhout
-
Patent number: 6513386Abstract: A vibration coupling stud for use in a vibration monitoring system includes digital memory and temperature sensing devices. Data is transferred between the vibration coupling stud and a vibration monitor. Data stored in the stud may include asset identification code, measuring point identification, prior measurement data, machine or bearing part numbers, and alarm limits.Type: GrantFiled: October 22, 1999Date of Patent: February 4, 2003Assignee: SKF Condition MonitoringInventors: John T. Barclay, Stephan L. Thompson, William A. McCarty
-
Patent number: 6489884Abstract: Vibration data is transmitted from a remote site to a control facility using wireless data transmission. In one embodiment, the vibration signal is conditioned and digitized, and then sent via a page transmitter to the control facility.Type: GrantFiled: November 30, 1998Date of Patent: December 3, 2002Assignee: SKF Condition MonitoringInventors: Roger E. Lamberson, John T. Barclay, Jim Jun Wei
-
Patent number: 6275781Abstract: A vibration data processor and processing method uses a frequency domain filter having low pipeline delay and accurate time domain signal reconstruction. The filter may be user configurable, and the filter may receive input data from a variable number of decimation stages. Sequences of extracted vibrational features are routed to a variable length output buffer for event detection.Type: GrantFiled: April 6, 1998Date of Patent: August 14, 2001Assignee: SKF Condition Monitoring, Inc.Inventors: Phillip L. Maness, Johannes I. Boerhout
-
Patent number: 6202491Abstract: A vibration coupling stud for use in a vibration monitoring system includes digital memory and temperature sensing devices. Data is transferred between the vibration coupling stud and a vibration monitor. Data stored in the stud may include measuring point identification, prior measurement data, machine or bearing part numbers, and alarm limits.Type: GrantFiled: October 23, 1998Date of Patent: March 20, 2001Assignee: SKF Condition Monitoring, Inc.Inventors: William A. McCarty, Stephan L. Thompson
-
Patent number: 6199422Abstract: A method and system for monitoring the operational condition of a machine is disclosed.Type: GrantFiled: April 6, 1998Date of Patent: March 13, 2001Assignee: SKF Condition Monitoring, Inc.Inventors: Johannes I. Boerhout, Phillip L. Maness, Hoa Nguyen, Wane D. Wier
-
Patent number: 6006164Abstract: A portable vibration monitoring probe is provided which comprises a housing, a probe and a transducer is provided. An analog to digital converter is coupled to the transducer output. The vibration monitor comprises an interface configured to transmit digital data comprising vibration parameters derived from the digitized analog signal to processing circuitry external to the housing. In some embodiments of the present invention, vibration monitors may be configured to store information in a memory located near the measuring point.Type: GrantFiled: July 22, 1997Date of Patent: December 21, 1999Assignee: SKF Condition Monitoring, Inc.Inventors: William A. McCarty, Jerry Drury, Bryan Calderwood, Steve Thompson
-
Patent number: 5992237Abstract: A vibration coupling stud for use in a vibration monitoring system includes digital memory and temperature sensing devices. Data is transferred between the vibration coupling stud and a vibration monitor. Data stored in the stud may include measuring point identification, prior measurement data, machine or bearing part numbers, and alarm limits.Type: GrantFiled: July 22, 1997Date of Patent: November 30, 1999Assignee: SKF Condition Monitoring, Inc.Inventors: William A. McCarty, Jerry Drury, Bryan Calderwood, Steve Thompson
-
Patent number: 5854553Abstract: The output of an eddy current probe is demodulated and subsequently linearized using an analog to digital converter, a digital signal processor, and a memory. The linearized digital output signal is converted back to an analog signal, the voltage of which is preferably directly proportional to the position of the conductive target in relation to the probe.Type: GrantFiled: June 19, 1996Date of Patent: December 29, 1998Assignee: SKF Condition MonitoringInventors: John T. Barclay, Phillip L. Maness, Leroy R. Bannach
-
Patent number: 5845230Abstract: Vibration data is transmitted from a remote site to a control facility using wireless data transmission. In one embodiment, the vibration signal is conditioned and digitized, and then sent via satellite to a hub satellite receiving station. From the hub satellite receiving station, the data may be sent to the control facility via the public telephone network.Type: GrantFiled: January 30, 1997Date of Patent: December 1, 1998Assignee: SKF Condition MonitoringInventor: Roger E. Lamberson
-
Patent number: 5679900Abstract: A vibration detecting and condition monitoring system for the press section, including felts, rollers and presses, employing a feature extracting circuit having a selectable plurality of Bessel type bandpass filters and an enveloping circuit to square the bandpassed signal output prior to FFT analysis of the signal. The system enables the enhancement and detection of highly impulsive signals in the frequency domain, that are indicative of defects in machinery operation.Type: GrantFiled: April 12, 1995Date of Patent: October 21, 1997Assignee: SKF Condition MonitoringInventor: Adrianus Josephus Smulders