Title :
Optimization of optically powered sensors
Author_Institution :
Toshiba Corp., Tokyo, Japan
fDate :
28 Oct-1 Nov 1991
Abstract :
The author has succeeded in achieving power supply for a distance of 1 km using a newly developed optically powered sensor system powered by pulsed light. This system employs the method of matching the impedances of load and of a photodiode by the optical/electrical conversion of pulsed light with a photodiode and boosting the voltage with a transformer. A high optical/electrical energy conversion efficiency of 14.8% was obtained from this system. By driving the semiconductor pressure sensor section with an optical input of 2.33 mW, sensing of a 1 km optical fiber cable length was realized. The accuracy of the prototype optical-power-supply-type pressure sensor was at a high level of ±0.2%. A prototype of a microcomputer-mounted `smart´ detector was fabricated
Keywords :
computerised instrumentation; fibre optic sensors; impedance matching; microcomputer applications; photodetectors; power supplies to apparatus; pressure measurement; pressure transducers; 1 km; 14.8 percent; 2.33 mW; impedances; matching; microcomputer mounted detector; optical fiber cable length; optical/electrical conversion; optically powered sensors; photodiode; pulsed light; semiconductor pressure sensor; smart detector; Boosting; Impedance; Intelligent sensors; Optical pulses; Optical sensors; Photodiodes; Prototypes; Pulse transformers; Pulsed power supplies; Sensor systems;
Conference_Titel :
Industrial Electronics, Control and Instrumentation, 1991. Proceedings. IECON '91., 1991 International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-87942-688-8
DOI :
10.1109/IECON.1991.238962
