Global Patent Index - EP 0571382 B1

EP 0571382 B1 1998-10-28 - OPTICAL PROCESS VARIABLE TRANSMITTER

Title (en)

OPTICAL PROCESS VARIABLE TRANSMITTER

Title (de)

OPTISCHER SENDER FÜR PROZESSVARIABLEN

Title (fr)

EMETTEUR OPTIQUE A VARIABLE DE PROCESSUS

Publication

EP 0571382 B1 (EN)

Application

EP 91906460 A

Priority

US 9100904 W

Abstract (en)

[origin: WO9214227A1] A light input (26) energizes an optical transmitter (10) providing a light output to a waveguide (16) indicating a process variable. The transmitter (10) has a process variable sensor (21) generating a sensor output. An electrical circuit receives the sensor output and generates an electrical transmitter output indicating the process variable adjusted by a changeable parameter stored in the electrical circuit. The electrical circuit has an input (42, 44) energizing the circuit. An LED (58) converts the electrical transmitter output to the light output. A gallium arsenide photodiode (42, 44) converts a first portion of received light into electrical energy provided to the energization input (42, 44) and converts a second portion of the received light into an electrical output controlling the stored parameter.

IPC 1-7 (main, further and additional classification)

G08C 23/00; H04B 10/00

IPC 8 full level (invention and additional information)

G08C 23/04 (2006.01); G08C 23/06 (2006.01); H04B 10/24 (2006.01)

CPC (invention and additional information)

G08C 23/06 (2013.01)

Citation (examination)

AL.: 'OPTICALLY INTERFACED SENSOR SYSTEM FOR AEROSPACE APPLICATIONS ' see the whole document

Designated contracting state (EPC)

DE GB NL

DOCDB simple family

WO 9214227 A1 19920820; DE 69130424 D1 19981203; DE 69130424 T2 19990610; EP 0571382 A1 19931201; EP 0571382 B1 19981028; JP 3130314 B2 20010131; JP H06504859 A 19940602