FR2248515A1 - Optical detector system for safety of vehicles - laser transmitter operates with active responder giving distance data - Google Patents
Optical detector system for safety of vehicles - laser transmitter operates with active responder giving distance dataInfo
- Publication number
- FR2248515A1 FR2248515A1 FR7337359A FR7337359A FR2248515A1 FR 2248515 A1 FR2248515 A1 FR 2248515A1 FR 7337359 A FR7337359 A FR 7337359A FR 7337359 A FR7337359 A FR 7337359A FR 2248515 A1 FR2248515 A1 FR 2248515A1
- Authority
- FR
- France
- Prior art keywords
- distance data
- vehicles
- safety
- optical detector
- detector system
- 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
Links
Classifications
-
- 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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/74—Systems using reradiation of electromagnetic waves other than radio waves, e.g. IFF, i.e. identification of friend or foe
-
- 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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
- G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
- G08G1/161—Decentralised systems, e.g. inter-vehicle communication
- G08G1/163—Decentralised systems, e.g. inter-vehicle communication involving continuous checking
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The system can operate in fog and vehicle control signals are derived from the receiver. A moving vehicle (V1) carries a transmitter receiver operating in association with responders (V2, V2o) comprising a reflector (6) in front of which is a liquid crystal (5) connected to a modulator (7). An identical responder (8, 9, 10) operates in the opposite direction. The transmitter (1) comprises a diode laser modulated by a generator (11). Received signals (12) are frequency transposed (17, 18) by two frequency generators (13, 14) to obtain the required information. After filtering (19) the signals are passed to a tracking loop (20) connected to a counter (23 to 27) followed by a digital to analogue converter (25, to 29) to give distance data. The diode laser is responsive to wavelength of from one to several microns.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7337359A FR2248515A1 (en) | 1973-10-19 | 1973-10-19 | Optical detector system for safety of vehicles - laser transmitter operates with active responder giving distance data |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7337359A FR2248515A1 (en) | 1973-10-19 | 1973-10-19 | Optical detector system for safety of vehicles - laser transmitter operates with active responder giving distance data |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2248515A1 true FR2248515A1 (en) | 1975-05-16 |
FR2248515B1 FR2248515B1 (en) | 1980-06-20 |
Family
ID=9126668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7337359A Granted FR2248515A1 (en) | 1973-10-19 | 1973-10-19 | Optical detector system for safety of vehicles - laser transmitter operates with active responder giving distance data |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2248515A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2500933A1 (en) * | 1981-02-27 | 1982-09-03 | Thomson Csf | Catadioptric stark effect laser modulator for IFF interrogator - uses corner cube catadioptres and two sets of orthogonal plane mirrors forming rectangular section waveguide |
EP0145989A1 (en) * | 1983-12-06 | 1985-06-26 | Nissan Motor Co., Ltd. | System and method for automatically controlling vehicle speed |
FR2576126A1 (en) * | 1985-01-16 | 1986-07-18 | Reinaud Guy | Optical device for detection and protection of moving objects |
EP0208610A2 (en) * | 1985-07-04 | 1987-01-14 | Jaeger | Device for detection of foreign substances through a wall and aid-system for driving vehicles or aircrafts |
US4891624A (en) * | 1987-06-12 | 1990-01-02 | Stanley Electric Co., Ltd. | Rearward vehicle obstruction detector using modulated light from the brake light elements |
EP0614093A1 (en) * | 1993-03-05 | 1994-09-07 | Thomson-Csf | Identification system with high discriminating power |
FR2863398A1 (en) * | 2003-12-09 | 2005-06-10 | Denso Corp | DRIVING ASSISTANCE APPARATUS FOR PREVENTING COLLISION OF VEHICLES |
NL2000561C2 (en) * | 2007-03-27 | 2008-10-02 | Stichting Noble House | Traffic communication system and method for communicating in traffic. |
-
1973
- 1973-10-19 FR FR7337359A patent/FR2248515A1/en active Granted
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2500933A1 (en) * | 1981-02-27 | 1982-09-03 | Thomson Csf | Catadioptric stark effect laser modulator for IFF interrogator - uses corner cube catadioptres and two sets of orthogonal plane mirrors forming rectangular section waveguide |
EP0145989A1 (en) * | 1983-12-06 | 1985-06-26 | Nissan Motor Co., Ltd. | System and method for automatically controlling vehicle speed |
FR2576126A1 (en) * | 1985-01-16 | 1986-07-18 | Reinaud Guy | Optical device for detection and protection of moving objects |
EP0208610A2 (en) * | 1985-07-04 | 1987-01-14 | Jaeger | Device for detection of foreign substances through a wall and aid-system for driving vehicles or aircrafts |
EP0208610A3 (en) * | 1985-07-04 | 1988-03-30 | Jaeger | Device for detection of foreign substances through a wall and aid-system for driving vehicles or aircrafts |
US4891624A (en) * | 1987-06-12 | 1990-01-02 | Stanley Electric Co., Ltd. | Rearward vehicle obstruction detector using modulated light from the brake light elements |
EP0614093A1 (en) * | 1993-03-05 | 1994-09-07 | Thomson-Csf | Identification system with high discriminating power |
FR2702280A1 (en) * | 1993-03-05 | 1994-09-09 | Thomson Csf | Identification system with high discriminating power. |
FR2863398A1 (en) * | 2003-12-09 | 2005-06-10 | Denso Corp | DRIVING ASSISTANCE APPARATUS FOR PREVENTING COLLISION OF VEHICLES |
US7205888B2 (en) | 2003-12-09 | 2007-04-17 | Denso Corporation | Driving assisting apparatus for preventing vehicular collision |
NL2000561C2 (en) * | 2007-03-27 | 2008-10-02 | Stichting Noble House | Traffic communication system and method for communicating in traffic. |
WO2008118014A1 (en) * | 2007-03-27 | 2008-10-02 | Stichting Noble House | Traffic communication system and method for communicating in traffic |
Also Published As
Publication number | Publication date |
---|---|
FR2248515B1 (en) | 1980-06-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |