公开(公告)号：IN154356B

公开(公告)日：1984-10-20

申请号：IN446CA1981

申请日：1981-04-28

Applicant: SERVO CORP OF AMERICA

Inventor： BAMBARA JOSEPH EUGENE ,  SANVILLE WALTER WOODWARD

IPC: B61L1/10 ,  B61K9/06 ,  G01M17/08

Abstract: A railroad car hot box detector system is provided which includes a variable circuit means for processing the heat signal generated by an infra-red detector viewing a sensing zone along a section of track. The system includes a conditioning circuit which determines one or more conditions of the train (such as the wheel speed or temperature of the car bottom) and uses that information to vary the processing circuit to enable the heat signal to be processed optimally for the detected condition.

公开(公告)号：IN154104B

公开(公告)日：1984-09-22

申请号：IN196CA1981

申请日：1981-02-20

Applicant: SERVO CORP OF AMERICA

Inventor： BAMBARA JOSEPH EUGENE ,  SANVILLE WALTER WOODWARD

IPC: A61B17/70 ,  B61K9/00 ,  A61B17/86 ,  A61B19/00 ,  A61F2/00 ,  A61F2/30 ,  A61F2/44 ,  B61K9/06 ,  B61L1/10 ,  B61L13/04

Abstract: An improved method and circuit is provided for processing waveforms from a railway car heat signal to eliminate spurious signals and to differentiate between roller bearings and friction bearings in a railroad hot box detector system. The waveforms generated by passing bearings are discretely sampled and spurious signals are eliminated by considering only those signals that fall within the crossing points of a threshold value. Discrimination between roller bearings and friction bearings is obtained by determining the ratio of the sum of the discrete values of the amplitude of the waveform within a first set of samples between the crossing points to the sum of the discrete values of the amplitude of the waveform within a second set of samples between the crossing points.