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GB2014319A - Vehicle speed detection apparatus - Google Patents

Vehicle speed detection apparatus

Info

Publication number
GB2014319A
GB2014319A GB7905844A GB7905844A GB2014319A GB 2014319 A GB2014319 A GB 2014319A GB 7905844 A GB7905844 A GB 7905844A GB 7905844 A GB7905844 A GB 7905844A GB 2014319 A GB2014319 A GB 2014319A
Authority
GB
United Kingdom
Prior art keywords
rotor
frequency
stator
speed
vehicle
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB7905844A
Other versions
GB2014319B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LONDON TRANSPORT EXECUTIVE
Original Assignee
LONDON TRANSPORT EXECUTIVE
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 LONDON TRANSPORT EXECUTIVE filed Critical LONDON TRANSPORT EXECUTIVE
Priority to GB7905844A priority Critical patent/GB2014319B/en
Publication of GB2014319A publication Critical patent/GB2014319A/en
Application granted granted Critical
Publication of GB2014319B publication Critical patent/GB2014319B/en
Expired legal-status Critical Current

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
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

An electrical system and apparatus for the detection of the speed of a moving railway vehicle includes in one embodiment a rotor (1) arranged to be driven from the axle of the vehicle the rotor (1) having alternate magnetic and non-magnetic portions (4, 5) arranged radially and arranged to rotate past a stator (2) separated from the rotor (1) by an air gap (3) and having primary (P1) and secondary (S1) windings wound thereon, the primary winding (P1) being supplied with alternating current at a first frequency considerably in excess of a second frequency derived from the passage of rotor (1) past the stator (2) to produce at the secondary winding (S1) of the stator (2) an output signal having the first frequency amplitude modulated at the second frequency which is proportional to the speed of the vehicle. In a second embodiment, the speed detector described above is used in conjunction with the speed detector described in Patent No. 1463761 <IMAGE>
GB7905844A 1977-11-25 1979-02-19 Vehicle speed detection apparatus Expired GB2014319B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7905844A GB2014319B (en) 1977-11-25 1979-02-19 Vehicle speed detection apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4919377 1977-11-25
GB7905844A GB2014319B (en) 1977-11-25 1979-02-19 Vehicle speed detection apparatus

Publications (2)

Publication Number Publication Date
GB2014319A true GB2014319A (en) 1979-08-22
GB2014319B GB2014319B (en) 1982-04-28

Family

ID=26266423

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7905844A Expired GB2014319B (en) 1977-11-25 1979-02-19 Vehicle speed detection apparatus

Country Status (1)

Country Link
GB (1) GB2014319B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156082A (en) * 1984-03-22 1985-10-02 Cambridge Electronic Ind Improvements in tachogenerators
DE102008056700A1 (en) * 2008-11-11 2010-06-10 Zf Friedrichshafen Ag Speed sensor for determining "slow (zero speed) and fast" speeds as well as for simultaneously determining the direction of rotation
WO2014164306A1 (en) * 2013-03-13 2014-10-09 Woodward, Inc. Aircraft wheel speed sensor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156082A (en) * 1984-03-22 1985-10-02 Cambridge Electronic Ind Improvements in tachogenerators
DE102008056700A1 (en) * 2008-11-11 2010-06-10 Zf Friedrichshafen Ag Speed sensor for determining "slow (zero speed) and fast" speeds as well as for simultaneously determining the direction of rotation
US8330451B2 (en) 2008-11-11 2012-12-11 Zf Friedrichshafen Ag Sensor for measuring rotational speeds as well as for the simultaneous determination of direction of rotation
DE102008056700B4 (en) * 2008-11-11 2013-02-28 Zf Friedrichshafen Ag Speed sensor for determining "slow (zero speed) and fast" speeds as well as for simultaneously determining the direction of rotation
WO2014164306A1 (en) * 2013-03-13 2014-10-09 Woodward, Inc. Aircraft wheel speed sensor
US9482686B2 (en) 2013-03-13 2016-11-01 Woodward, Inc. Aircraft wheel speed sensor

Also Published As

Publication number Publication date
GB2014319B (en) 1982-04-28

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee