公开(公告)号：WO1980000822A1

公开(公告)日：1980-05-01

申请号：PCT/US1979000649

申请日：1979-08-23

Applicant: VAPOR CORP

Inventor： VAPOR CORP ,  CALLAHAN B ,  KRUSE R ,  NOENS R ,  DANIELS R ,  CARLSON G ,  STUMPF R

IPC: B60K26/00

CPC classification number: G07C5/0875 ,  B60K35/00 ,  B60L2200/26 ,  B60T17/22

Abstract: An onboard unit consisting of a tape recorder (11), and associated data handling components (1) utilized to provide records of vehicular operating information including speed, distance (12), power level (27), braking level (31) traction motor current (27) and other control events. Each quantity is associated with an incremental distance and/or time which is fixed. In the case of a rail guided vehicle, location signals provided by ground mounted markers (29, 30) are also recorded. Summation of incremental distances as determined from each marker provides an exact location. A magnetic tape unit (11) provides both data storage and operations instruction for a microprocessor (1) based system, allowing convenient alteration or variations in unit function without internal modification. Each unit retains a unique non-volatile serial number which is transferred to each tape allowing convenient correlation of recorded tapes to onboard units.

公开(公告)号：BR7404228D0

公开(公告)日：1975-01-07

申请号：BR422874

申请日：1974-05-23

Applicant: VAPOR CORP

Inventor： CALLAHAN B ,  HIGGINS P

IPC: B60L3/10 ,  B60T8/171 ,  G01P3/48 ,  G01P3/54 ,  G01P3/50

Abstract: A speed detector for producing from the output of an axle-mounted transducer an analog output signal indicative of the speed of a moving vehicle. A signal processing circuit responsive to the output of the transducer generates a square-wave control signal which is utilized to control the recurrent charging and discharging of an error integrating capacitor. The rate of discharge of the capacitor is such that an error voltage is developed across the capacitor indicative of the vehicle speed error, and an FET switch controlled by the square-wave periodically applies this error as a pulse to a storage integrator. By varying the discharge rate of the capacitor in accordance with the voltage developed in the storage integrator, an analog output signal indicative of vehicle speed is developed. By controlling the conduction time of the FET switch, the effectiveness of the error on the analog output signal is proportioned to the absolute speed error of the vehicle.