Acoustic bearing defect detector
First Claim
1. In an apparatus for acoustically scanning bearings of wheels of a train during operation of said train as said train moves through a scanning zone of a track, said apparatus being of the type including means for transducing acoustic vibrations into electrical signals and means for processing said electrical signals to isolate signals of predetermined impact frequencies indicative of particular bearing defects, the improvement comprising wheel presence transducers on said track for generating signals indicative of the beginning and the end of a window during which an isolated signal is expected to occur for a particular bearing of said train and means to determine if an actual isolated signal associated with said particular bearing occurs within said window.
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Accused Products
Abstract
The present invention relates to bearing defect detectors and in particular to an acoustic system for detecting defects in the bearings of moving railroad cars and identifying the location of these defects.
35 Citations
18 Claims
- 1. In an apparatus for acoustically scanning bearings of wheels of a train during operation of said train as said train moves through a scanning zone of a track, said apparatus being of the type including means for transducing acoustic vibrations into electrical signals and means for processing said electrical signals to isolate signals of predetermined impact frequencies indicative of particular bearing defects, the improvement comprising wheel presence transducers on said track for generating signals indicative of the beginning and the end of a window during which an isolated signal is expected to occur for a particular bearing of said train and means to determine if an actual isolated signal associated with said particular bearing occurs within said window.
Specification