FR2389893A1 - - Google Patents

Info

Publication number
FR2389893A1
FR2389893A1 FR7813539A FR7813539A FR2389893A1 FR 2389893 A1 FR2389893 A1 FR 2389893A1 FR 7813539 A FR7813539 A FR 7813539A FR 7813539 A FR7813539 A FR 7813539A FR 2389893 A1 FR2389893 A1 FR 2389893A1
Authority
FR
France
Prior art keywords
vehicle
signal
envelope
approach
coupled
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.)
Withdrawn
Application number
FR7813539A
Other languages
English (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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2389893A1 publication Critical patent/FR2389893A1/fr
Withdrawn legal-status Critical Current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
    • G01P3/50—Devices characterised by the use of electric or magnetic means for measuring linear speed
    • G01P3/52—Devices characterised by the use of electric or magnetic means for measuring linear speed by measuring amplitude of generated current or voltage
    • 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

Abstract

La présente invention concerne des systèmes de détection de véhicules dans lesquels un émetteur émettant un signal à ondes entretenues est couplé à un récepteur via un moyen détecteur de façon que l'approche d'un véhicule détecté produise une excursion de sens positif de l'enveloppe du signal reçu. Application : Détection de la vitesse des véhicules.
FR7813539A 1977-05-06 1978-05-08 Withdrawn FR2389893A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPD000877 1977-05-06

Publications (1)

Publication Number Publication Date
FR2389893A1 true FR2389893A1 (fr) 1978-12-01

Family

ID=3766968

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7813539A Withdrawn FR2389893A1 (fr) 1977-05-06 1978-05-08

Country Status (4)

Country Link
JP (1) JPS549678A (fr)
DE (1) DE2819566A1 (fr)
FR (1) FR2389893A1 (fr)
GB (1) GB1601147A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5742234U (fr) * 1980-08-21 1982-03-08
JPS5742235U (fr) * 1980-08-21 1982-03-08

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999999A (en) * 1955-02-08 1961-09-12 Everhard H B Bartelink Highway traffic control system
US3626413A (en) * 1970-02-02 1971-12-07 Howard C Zachmann Traffic surveillance and control system
DE2161444A1 (de) * 1970-12-14 1972-07-13 Abex Corp Fühler fur bewegte Metallobjekte
FR2291558A1 (fr) * 1974-05-28 1976-06-11 Autostrade Concess Const Systeme perfectionne pour le controle electronique du trafic en temps reel et pour des transmissions bi-directionnelles en code et en clair entre un centre operationnel et les vehicules le long d'un troncon routier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999999A (en) * 1955-02-08 1961-09-12 Everhard H B Bartelink Highway traffic control system
US3626413A (en) * 1970-02-02 1971-12-07 Howard C Zachmann Traffic surveillance and control system
DE2161444A1 (de) * 1970-12-14 1972-07-13 Abex Corp Fühler fur bewegte Metallobjekte
FR2291558A1 (fr) * 1974-05-28 1976-06-11 Autostrade Concess Const Systeme perfectionne pour le controle electronique du trafic en temps reel et pour des transmissions bi-directionnelles en code et en clair entre un centre operationnel et les vehicules le long d'un troncon routier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/72 *

Also Published As

Publication number Publication date
GB1601147A (en) 1981-10-28
JPS549678A (en) 1979-01-24
DE2819566A1 (de) 1978-11-16

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Legal Events

Date Code Title Description
ST Notification of lapse