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OPTICAL SENSORS AND FIBRE OPTIC WAVE LENGTH DIVISION MULTIPLEXING (WDM) SYSTEMS FOR PROCESS CONTROL

Objective


Sensors use luminescence-decay, frequency and intensity-modulation principles. This project succeeded in defining, designing, optimizing, and prototyping several kinds of sensors and the functions of a network to which all can be simultaneously connected. The sensors developed are: temperature sensors based on the luminescence-decay principle; pressure sensors based on the frequency-modulation principle; and pressure and temperature sensors based on the intensity modulation principle.
WAVELENGTH DIVISION MULTIPLEXERS COMBINED WITH MULTIMODE OPTICAL FIBRE ARE BEING APPLIED TO DIVERSE AREAS OF PROCESS CONTROL: THE PURPOSE OF THIS RESEARCH PROGRAMME IS:

1) TO EXTEND THE USE OF SUCH SYSTEMS TO THE ACQUISITION AND TRANSMISSION OVER A DISTANCE OF SEVERAL HUNDRED METERS OF SIGNALS DELIVERED BY OPTICAL OR OPTICALLY OPERATED SENSORS MEASURING PRESSURE, TEMPERATURE, LEVEL, FLOWRATE, DISPLACEMENT, ETC. BY IMPROVING THE POWER BUDGET, IDENTIFYING INFLUENCE PARAMETERS AND COMPENSATING FOR THEM.

2) TO DEVELOP SENSORS AND OPTO ELECTRONICS COMPATIBLE WITH THE WDM SYSTEM, BY THE FOLLOWING DISTINCT APPROACHES:
2.1.) THE ENGINEERING OF SIMPLE ANALOGUE DEVICES WITH APPROPRIATE REFERENCING AND COMPENSATION.
2.2.) THE DESIGN OF NOVEL OPTICAL MICROTRANSDUCERS USING SILICON MICRO-ENGINEERING TECHNOLOGY TO DEVELOP:
- OPTICALLY POWERED, OPTICALLY READ ELECTRONIC SENSORS,
- OPTICALLY POWERED, OPTICALLY READ MECHANICAL RESONANT SENSORS.2.3.) THE DESIGN OF FIBRE OPTIC SENSORS BASED ON LUMINESCENCE DECAY TIME.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

SOCIETE FRAMATOME
Address
Tour Framatome
92084 Paris La Defense
France

Participants (3)

Compagnie Générale d'Electricité (CGE)
France
Address
Route De Nozay
91460 Marcoussis
DEGUSSA AG
Germany
Address
Benningsenplatz 1
40474 Duesseldorf
Thorn EMI plc
United Kingdom
Address
4 Tenterton Street
W1R 9A London