FR2345867B1 - - Google Patents
Info
- Publication number
- FR2345867B1 FR2345867B1 FR7705396A FR7705396A FR2345867B1 FR 2345867 B1 FR2345867 B1 FR 2345867B1 FR 7705396 A FR7705396 A FR 7705396A FR 7705396 A FR7705396 A FR 7705396A FR 2345867 B1 FR2345867 B1 FR 2345867B1
- Authority
- FR
- France
- 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
Links
Classifications
-
- 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 trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
- B61L25/04—Indicating or recording train identities
- B61L25/045—Indicating or recording train identities using reradiating tags
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
- G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
- G01S13/753—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using frequency selective elements, e.g. resonator
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Radar Systems Or Details Thereof (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2612968A DE2612968C2 (de) | 1976-03-26 | 1976-03-26 | Einrichtung zum Erhöhen der Sicherheit gegen Übertragungsfehler bei einem Informationsübertragungssystem mit periodisch durchstimmbarem, frequenzselektiv reflektiertem Abfragesignal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2345867A1 FR2345867A1 (fr) | 1977-10-21 |
| FR2345867B1 true FR2345867B1 (US08124630-20120228-C00102.png) | 1980-09-12 |
Family
ID=5973544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7705396A Granted FR2345867A1 (fr) | 1976-03-26 | 1977-02-24 | Dispositif pour l'accroissement de la securite contre les erreurs de transmission dans un systeme de transmission d'informations |
Country Status (7)
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0380914B1 (en) * | 1989-01-09 | 1994-05-04 | Mitsubishi Denki Kabushiki Kaisha | Antenna system |
| JP3106088B2 (ja) * | 1995-05-26 | 2000-11-06 | 三菱電機株式会社 | レーダ・トランスポンダ |
| DE102006033211A1 (de) * | 2006-07-12 | 2008-01-24 | Siemens Ag | System, insbesondere Nahverkehrsbahnsystem, und Verfahren zur fahrzeugseitigen Fahrwegerfassung für ein solches System |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037227A (en) * | 1966-04-11 | 1977-07-19 | The United States Of America As Represented By The Secretary Of The Air Force | Controlled deception jamming device |
| DE1541583C3 (de) * | 1966-09-22 | 1974-04-11 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | System zum selbsttätigen drahtlosen Übertragen von mehrstelligen Informationen zwischen gegeneinander beweglichen Abfrage- und Antwortgeräten, insbesondere der Nummern von Eisenbahnfahrzeugen nach ortsfesten Abfragegeräten |
| US3863244A (en) * | 1972-06-14 | 1975-01-28 | Lichtblau G J | Electronic security system having improved noise discrimination |
| US3969725A (en) * | 1974-06-12 | 1976-07-13 | The United States Of America As Represented By The Secretary Of Transportation | Distance measuring equipment |
-
1976
- 1976-03-26 DE DE2612968A patent/DE2612968C2/de not_active Expired
- 1976-12-21 CH CH1606476A patent/CH607508A5/xx not_active IP Right Cessation
-
1977
- 1977-02-24 FR FR7705396A patent/FR2345867A1/fr active Granted
- 1977-03-03 SE SE7702373A patent/SE411333B/xx not_active IP Right Cessation
- 1977-03-11 US US05/776,766 patent/US4121208A/en not_active Expired - Lifetime
- 1977-03-24 ZA ZA00771770A patent/ZA771770B/xx unknown
- 1977-03-24 CA CA274,681A patent/CA1080332A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ZA771770B (en) | 1978-02-22 |
| CA1080332A (en) | 1980-06-24 |
| DE2612968C2 (de) | 1978-03-30 |
| SE411333B (sv) | 1979-12-17 |
| DE2612968B1 (de) | 1977-08-11 |
| US4121208A (en) | 1978-10-17 |
| FR2345867A1 (fr) | 1977-10-21 |
| CH607508A5 (US08124630-20120228-C00102.png) | 1978-12-29 |
| SE7702373L (sv) | 1977-09-27 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |