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.

公开(公告)号：CA1165837A

公开(公告)日：1984-04-17

申请号：CA373105

申请日：1981-03-16

Applicant: SERVO CORP OF AMERICA

Inventor： BAMBARA JOSEPH E ,  SANVILLE W WOODWARD

IPC: B61K9/00 ,  A61B17/70 ,  A61B17/86 ,  A61B19/00 ,  A61F2/00 ,  A61F2/30 ,  A61F2/44 ,  B61K9/06 ,  B61L1/10 ,  G08B21/00

Abstract: RAILROAD CAR WHEEL BEARING HEAT SIGNAL PROCESSING CIRCUIT 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.

公开(公告)号：GB2127171A

公开(公告)日：1984-04-04

申请号：GB8311304

申请日：1983-04-26

Applicant: SERVO CORP OF AMERICA

Inventor： GLAZAR ARTHUR J ,  VILLAR LUIS FERNANDO

IPC: G01V8/14 ,  G01B11/27

Abstract: An optical sensor (10), such as an infrared sensor for detecting overheated wheels or wheel bearing on trains passing along a section of track, comprises an optical system (24) having its receiving optical axis angled (e.g. perpendicularly) to the line of sight of the sensor through a sighting aperture (26). A mirror (30) is pivotally mounted in the line of sight and is movable between a first (operating) position in which it reflects rays travelling along the line of sight to the optical system (24), and a second (aiming) position in which an observer can look through a viewing aperture in the top of the sensor and see through the sighting aperture (26) via the mirror (30). When cross hairs (36) between the viewing aperture and the mirror (30) appear superimposed on cross hairs (38) between the mirror (30) and the sighting aperture (26), the observers' line of sight through the aperture (26) is the same as that of the optical system (24) when the mirror is in the first position, thus permitting the sensor to be aimed accurately and easily at a target.

公开(公告)号：DE3329522A1

公开(公告)日：1984-03-15

申请号：DE3329522

申请日：1983-08-16

Applicant: SERVO CORP OF AMERICA

Inventor： VILLAR LUIS FERNANDO

IPC: G01K7/02 ,  G01K1/16 ,  G01K7/04 ,  G01K1/00 ,  F24H9/20

Abstract: An improved heat sensing tip for a temperature sensing device is provided. The tip comprises an elongated shell of heat conductive material. A temperature probe is positioned for movement within the shell toward and away from an opening in the shell. A cap of heat conductive material is positioned at the front of the probe. A spring urges the cap in contact with the shell for heat conductivity between the two when the device is not in operation. When the device is in operation, the spring bias is overcome thereby providing an insulating air gap between the shell and the tip.

公开(公告)号：GB2075183B

公开(公告)日：1983-11-23

申请号：GB8110201

申请日：1981-04-01

Applicant: SERVO CORP OF AMERICA

IPC: B61L1/10 ,  B61K9/06 ,  G01M17/08 ,  G01J5/10

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：SE8304630D0

公开(公告)日：1983-08-26

申请号：SE8304630

申请日：1983-08-26

Applicant: SERVO CORP OF AMERICA

Inventor： VILLAR L F

IPC: G01K1/16 ,  G01K7/02 ,  G01K7/04

Abstract: An improved heat sensing tip for a temperature sensing device is provided. The tip comprises an elongated shell of heat conductive material. A temperature probe is positioned for movement within the shell toward and away from an opening in the shell. A cap of heat conductive material is positioned at the front of the probe. A spring urges the cap in contact with the shell for heat conductivity between the two when the device is not in operation. When the device is in operation, the spring bias is overcome thereby providing an insulating air gap between the shell and the tip.

公开(公告)号：DE3236275A1

公开(公告)日：1983-04-21

申请号：DE3236275

申请日：1982-09-30

Applicant: SERVO CORP OF AMERICA

Inventor： GALLAGHER CORNELIUS A

IPC: G01M13/04 ,  B61K9/00 ,  B61K9/06 ,  G01J5/00 ,  G01M17/08 ,  B61K9/04

公开(公告)号：FR2405851B1

公开(公告)日：1983-02-04

申请号：FR7828030

申请日：1978-09-29

Applicant: SERVO CORP OF AMERICA

IPC: B61K9/06 ,  G01N25/72

公开(公告)号：AU7520481A

公开(公告)日：1982-07-29

申请号：AU7520481

申请日：1981-09-14

Applicant: SERVO CORP OF AMERICA

Inventor： SANVILLE W WOODWARD

IPC: B61K11/00 ,  B61L1/08 ,  B61K9/00 ,  G01R29/02

Abstract: A method is provided for determining whether an output signal from a magnetic railway wheel detector is produced by the actual passage of a wheel over the transducer. The output signal is compared with an amplitude threshold value and the time period between the zero crossing point and the time at which the signal attains amplitude threshold is compared with a time threshold level. The thresholds are set as a function of the speed of the train. Unless the thresholds are exceeded the output signal is disregarded.