Title:
【発明の名称】車両における交通情報の把握のためのシステム
Document Type and Number:
Japanese Patent JP3454830
Kind Code:
B2
Abstract:
PCT No. PCT/EP95/01253 Sec. 371 Date Oct. 9, 1996 Sec. 102(e) Date Oct. 9, 1996 PCT Filed Apr. 6, 1995 PCT Pub. No. WO95/29471 PCT Pub. Date Nov. 2, 1995The invention concerns traffic information acquisition systems for vehicles, which systems have a first opto-electrical transceiver on the vehicle side and a second opto-electrical transceiver provided at predetermined locations in traffic lanes. The first transceiver emits a first signal and receives and decodes a second signal from the second transceiver. The second transceiver receives the first signal from the first transceiver and sends back a coded, second signal to the first transceiver. The first transceiver is in the form of a reflection-operating time-distance measuring device. The emitted optical distance-measuring pulse signal is simultaneously the signal received by the second transceiver. The second transceiver emits the second signal after a delay time following reception of the first signal. The delay time should be longer than the maximum amount of time required for a distance measurement. It is thereby ensured that a signal from the second transceiver is not erroneously interpreted as a signal reflected by a target.
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Inventors:
Gedurt Georg Otto
Application Number:
JP52731095A
Publication Date:
October 06, 2003
Filing Date:
April 06, 1995
Export Citation:
Assignee:
Leica Geometries Actien Gezel Shaft
International Classes:
G01S7/483; G01S17/74; G08G1/01; G08G1/09; G08G1/0967; G08G1/16; (IPC1-7): G08G1/09; G08G1/16
Domestic Patent References:
| JP317800A |
Other References:
【文献】独国特許出願公開4138050(DE,A1)
【文献】米国特許5062088(US,A)
【文献】国際公開92/022450(WO,A1)
【文献】米国特許5062088(US,A)
【文献】国際公開92/022450(WO,A1)
Attorney, Agent or Firm:
Fujita Akira