Accession Number : ADP010154

Title :   The History and Application of the Envelope Detector

Corporate Author : JOINT OIL ANALYSIS PROGRAM PENSACOLA FLTECHNICAL SUPPORT CENTER

Personal Author(s) : Frarey, John L.

PDF Url : ADP010154

Report Date : APR 1996

Pagination or Media Count : 20

Abstract : The envelope detector has become one of the standard techniques used in the detection of defective rolling element bearings. Some forms of the envelope detector are also used in gear box analysis. First uses of the envelope detector seem to date to 1971. This paper will discuss the history of the development. Data from the envelope detector will be analyzed to determine which data characteristics are due to the defective bearing and which are due to the structure and which are due to the characteristics of the envelope detector. Other forms of envelope detectors such as those employing the Hilbert transform will also be covered.

Descriptors :   *SYMPOSIA, *ROLLER BEARINGS, VIBRATION, DETECTORS, DEMODULATION, ENVELOPE(SPACE), INTEGRAL TRANSFORMS.

Subject Categories : Machinery and Tools
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE