EP 0053790 A1 19820616 - Fiber optical sensor system, preferably for measuring physical parameters.
Title (en)
Fiber optical sensor system, preferably for measuring physical parameters.
Title (de)
Sensorsystem für Lichtleitfasern, vorzugsweise zum Messen physikalischer Parameter.
Title (fr)
Système de capteurs à fibre optique, de préférance pour mesurer des paramètres physiques.
Publication
Application
Priority
US 21168180 A 19801201
Abstract (en)
The system contains a fiber optical transmission line (6), a first light source (10) for emitting a first light beam into a first end of the transmission line (6), and at least one first light sensitive element (46) for receiving light from a second end of the transmission line (6). An energy storage device (56) such as a capacitor is connected to the first light sensitive element (46) for energizing various components. The system further contains a second light source (82) for emitting a second light beam into the second end of the transmission line (6). This source (82) is controlled in dependence upon information to be transmitted, preferably in dependence of a physical parameter (p1,p2,p3,p4). The system finally contains a second receiver element (90) for receiving light from the first end of the transmission line (6). This element generates an electric output signal which is in accordance with the transmitted information. The system preferably has a large number of transducer units (60) or measuring elements associated with various second ends of the transmission line (6) for transmitting information of various nature and/or from various locations.
IPC 1-7
IPC 8 full level
G08C 15/06 (2006.01); G08C 23/04 (2006.01); H04B 10/00 (2006.01); H04B 10/22 (2006.01); H04B 14/02 (2006.01); B60R 16/02 (2006.01); B60R 16/03 (2006.01)
CPC (source: EP US)
H04B 10/807 (2013.01 - EP US); H04B 14/026 (2013.01 - EP US); B60R 16/0315 (2013.01 - EP US)
Citation (search report)
- US 4156810 A 19790529 - IGARASHI SHIGEMI [JP]
- GB 1540907 A 19790221 - STANDARD TELEPHONES CABLES LTD
- DE 2801104 A1 19780803 - SATO KOKI KK
- US 2338882 A 19440111 - TODD CHESTER W
- GB 1482774 A 19770817 - BOSCH GMBH ROBERT
- US 3518628 A 19700630 - GIEL GEORGE J, et al
- DE 2839127 A1 19800320 - BBC BROWN BOVERI & CIE
- The Bell System Journal, Band 58, Nr. 7, September 1979, seiten 1735-1741 New York, U.S.A. R.C. MILLER et al.: "Optically Powered Speech Communication over a Fiber Lightguide" * seite 1735, zeile 19 - seite 1737, zeile 22; seite 1739, zeile 11 - seite 1740, zeile 15; seite 1740, zeile 40 - seite 1741, zeile 1; figuren 1,2 *
- Laser Focus, Band 15, Nr. 1, Januar 1979, seiten 48-50 Newton "Bell Labs Builds a Light-Powered Phone Around Efficient Photocell and Ringer" * seite 49, zeilen 6-11; seite 49, zeilen 24-37 *
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 0053790 A1 19820616; JP S57121794 A 19820729; US 4346478 A 19820824
DOCDB simple family (application)
EP 81110054 A 19811201; JP 19359481 A 19811201; US 21168180 A 19801201