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- Withdrawn
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Traffic Control Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5742235U (fr) * | 1980-08-21 | 1982-03-08 | ||
JPS5742234U (fr) * | 1980-08-21 | 1982-03-08 |
Citations (4)
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 |
-
1978
- 1978-05-03 GB GB1754378A patent/GB1601147A/en not_active Expired
- 1978-05-05 DE DE19782819566 patent/DE2819566A1/de not_active Withdrawn
- 1978-05-06 JP JP5399678A patent/JPS549678A/ja active Pending
- 1978-05-08 FR FR7813539A patent/FR2389893A1/fr not_active Withdrawn
Patent Citations (4)
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)
Title |
---|
EXBK/72 * |
Also Published As
Publication number | Publication date |
---|---|
JPS549678A (en) | 1979-01-24 |
DE2819566A1 (de) | 1978-11-16 |
GB1601147A (en) | 1981-10-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |