NO972238D0 - Method and apparatus for determining the speed of railroad vehicles - Google Patents

Method and apparatus for determining the speed of railroad vehicles

Info

Publication number
NO972238D0
NO972238D0 NO972238A NO972238A NO972238D0 NO 972238 D0 NO972238 D0 NO 972238D0 NO 972238 A NO972238 A NO 972238A NO 972238 A NO972238 A NO 972238A NO 972238 D0 NO972238 D0 NO 972238D0
Authority
NO
Norway
Prior art keywords
speed
parabolas
rail
triggering times
signal patterns
Prior art date
Application number
NO972238A
Other languages
Norwegian (no)
Other versions
NO972238L (en
Inventor
Hermann Fehrenbach
Original Assignee
Sel Alcatel Ag
Fraunhofer Ges Forschung
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sel Alcatel Ag, Fraunhofer Ges Forschung filed Critical Sel Alcatel Ag
Publication of NO972238D0 publication Critical patent/NO972238D0/en
Publication of NO972238L publication Critical patent/NO972238L/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
    • G01P3/66—Devices characterised by the determination of the time taken to traverse a fixed distance using electric or magnetic means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Traffic Control Systems (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The invention relates to a method including means for the execution thereof, which can be used to determine the speed of a rail vehicle very precisely from the distance travelled. The output signals (JV1, JV2) of two electromagnetic rail contacts arranged on a rail at a predetermined distance from each other are recorded in digital form, and their time interval is used to calculate the speed. To obtain precise triggering times for time measurement, signal patterns (RJ1, RJ2) reproducing a wheel passage are each optimally approximated by calculation using parabolas (P1, P2), and the co-ordinates of the vertexes of the parabolas are used as the triggering times (tS1, tS2). To check whether both successive signal patterns should be associated with wheel passages, the cross-correlation coefficient between the signal pattern and the approximate parabola can be calculated, and compared with a characteristic set value.
NO972238A 1995-09-16 1997-05-15 Method and apparatus for determining the speed of railroad vehicles NO972238L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP95114611 1995-09-16
PCT/EP1996/004048 WO1997010511A1 (en) 1995-09-16 1996-09-16 Method and means for high precision determination of the speed of rail vehicles

Publications (2)

Publication Number Publication Date
NO972238D0 true NO972238D0 (en) 1997-05-15
NO972238L NO972238L (en) 1997-07-16

Family

ID=8219623

Family Applications (1)

Application Number Title Priority Date Filing Date
NO972238A NO972238L (en) 1995-09-16 1997-05-15 Method and apparatus for determining the speed of railroad vehicles

Country Status (10)

Country Link
EP (1) EP0792460B1 (en)
AT (1) ATE196011T1 (en)
CZ (1) CZ286228B6 (en)
DE (1) DE59605819D1 (en)
DK (1) DK0792460T3 (en)
ES (1) ES2150138T3 (en)
HU (1) HU218126B (en)
NO (1) NO972238L (en)
PL (1) PL181137B1 (en)
WO (1) WO1997010511A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004142550A (en) * 2002-10-23 2004-05-20 Honda Motor Co Ltd Vehicle body speed measuring device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117937A (en) * 1982-04-23 1983-10-19 Redvers Albert Hocken A timing system
DE4302093A1 (en) * 1993-01-21 1994-07-28 Siemens Ag Method for determining the speed of railway vehicles

Also Published As

Publication number Publication date
DE59605819D1 (en) 2000-10-05
WO1997010511A1 (en) 1997-03-20
ES2150138T3 (en) 2000-11-16
HU218126B (en) 2000-06-28
EP0792460B1 (en) 2000-08-30
ATE196011T1 (en) 2000-09-15
NO972238L (en) 1997-07-16
HUP9701874A2 (en) 1998-03-02
DK0792460T3 (en) 2000-12-18
PL181137B1 (en) 2001-06-29
CZ286228B6 (en) 2000-02-16
HUP9701874A3 (en) 1999-08-30
PL320420A1 (en) 1997-09-29
CZ148997A3 (en) 1998-12-16
EP0792460A1 (en) 1997-09-03

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Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application