GB818782A - Speed-measuring system - Google Patents

Speed-measuring system

Info

Publication number
GB818782A
GB818782A GB36213/56A GB3621356A GB818782A GB 818782 A GB818782 A GB 818782A GB 36213/56 A GB36213/56 A GB 36213/56A GB 3621356 A GB3621356 A GB 3621356A GB 818782 A GB818782 A GB 818782A
Authority
GB
United Kingdom
Prior art keywords
speed
track
head
signals
magnetic
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.)
Expired
Application number
GB36213/56A
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.)
FORGES ER ATELIERS DE CONST EL
Original Assignee
FORGES ER ATELIERS DE CONST EL
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 FORGES ER ATELIERS DE CONST EL filed Critical FORGES ER ATELIERS DE CONST EL
Publication of GB818782A publication Critical patent/GB818782A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L17/00—Switching systems for classification yards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L25/00—Recording or indicating positions or identities of vehicles or vehicle trains or setting of track apparatus
    • B61L25/02—Indicating or recording positions or identities of vehicles or vehicle trains
    • B61L25/021—Measuring and recording of train speed
    • 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
    • G01P3/50—Devices characterised by the use of electric or magnetic means for measuring linear speed
    • G01P3/54—Devices characterised by the use of electric or magnetic means for measuring linear speed by measuring frequency of generated current or voltage

Abstract

818,782. Speed measurement. FORGES ET ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE JEUMONT. Nov. 27, 1956 [Dec. 30, 1955; March 7, 1956], No. 36213/56. Class 40(1). [Also in Group XXX] The speed of movement of a body of ferro-magnetic material relative to another object (where the body is a track on which the object moves or a frame in which the body rotates) is measured by impressing a succession of magnetic marks on the body and sensing these marks by suitable responsive .means, each mark being made as a result of the pick-up of a signal by the responsive means. In Fig. 1, the recording head 4 makes a mark on a railway track 2 which is picked up by the reproducing head 5 when it has travelled the distance m. The receiver 9 detects this signal and passes an impulse to the oscillator 8 to cause a fresh mark to be made. The indicator 11 measures the frequency of the signals and thus gives a speed of the vehicle relative to the track. A further oscillator 12 continuously generates signals of very low frequency (e.g. 1 c/s) the failure of which de-energizes relay 14 and indicates a fault. These signals also initiate the generation of the marks. Erase heads 6, 7 prevent false pick-up due to stray magnetization of the track. The indicator may be used to control signals, automatic safety devices or speed-regulating means. The indicator 11 may show the mean amplitude of the pulses. When the direction of travel of the vehicle is reversed the connections to heads 4, 5 are interchanged. For measuring the speed of rotation of an object (Fig. 2), the magnetizing head 4A, pickup head 5A and erase head 6A are mounted on a removable non-magnetic yoke 20 and can move radially in sleeves 21, 22, 23. The rotor may be a flywheel, disc, shaft or ring, and if non- magnetic it may be coated, or there may be attached a ring or disc of iron. A plurality of erase heads can be used.
GB36213/56A 1955-12-30 1956-11-27 Speed-measuring system Expired GB818782A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1031033X 1955-12-30

Publications (1)

Publication Number Publication Date
GB818782A true GB818782A (en) 1959-08-26

Family

ID=9582889

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36213/56A Expired GB818782A (en) 1955-12-30 1956-11-27 Speed-measuring system

Country Status (5)

Country Link
BE (1) BE553549A (en)
CH (1) CH342388A (en)
DE (1) DE1031033B (en)
FR (2) FR1139526A (en)
GB (1) GB818782A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402350A (en) * 1965-12-06 1968-09-17 Richard L. Shellabarger Method and product for standardizing tape recording and playback systems
US4968934A (en) * 1987-10-23 1990-11-06 Societe Nationale Elf Aquitaine Magnetic marking apparatus for magnetically measuring displacement of a moveable element in a well

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3641748A1 (en) * 1986-12-06 1988-06-16 Hoesch Stahl Ag METHOD AND DEVICE FOR MEASURING AND REGULATING THE DEGREE OF DEFORM
JPH01114759A (en) * 1987-10-28 1989-05-08 Nippon Soken Inc Displacement speed detector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2576424A (en) * 1945-05-09 1951-11-27 Philco Corp Automatic speed control for railguided vehicles
FR1002216A (en) * 1946-08-16 1952-03-04 Clair Echo Soc Electronic pulse speed regulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402350A (en) * 1965-12-06 1968-09-17 Richard L. Shellabarger Method and product for standardizing tape recording and playback systems
US4968934A (en) * 1987-10-23 1990-11-06 Societe Nationale Elf Aquitaine Magnetic marking apparatus for magnetically measuring displacement of a moveable element in a well

Also Published As

Publication number Publication date
FR69314E (en) 1958-10-23
BE553549A (en)
DE1031033B (en) 1958-05-29
CH342388A (en) 1959-11-15
FR1139526A (en) 1957-07-02

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