Title :
Fiber-optic sensor for automotive applications [pressure and temperature measurement]
Author :
Bock, Wojtek J. ; Nawrocka, Magdalena S. ; Urbanczyk, Waclaw ; Rostkowski, Jacek ; Martynkien, Tadeusz
Author_Institution :
Departement d´´informatique et d´´ingenierie, Univ. du Quebec en Outauais, Gatineau, Que., Canada
Abstract :
Our paper presents the first application of a fiber-optic interferometric sensor to real-time monitoring of dynamic pressure and temperature in the exhaust pipe of an automotive engine. The sensor is based on highly birefringent fibers, where the phase shifts between two pairs of polarized modes are induced by two measurands and decoded simultaneously using a coherence-addressing principle. The system allows for unambiguous measurement of pressure and temperature changes in the range of 140 mbar and 100°C, and with an accuracy of 2 mbar and 0.4°C, respectively, at a sampling rate up to 200 kHz. Preliminary testing of the sensor provided data that allow determination of the flow of exhaust gases and gives information about mass emission. Additionally, the dynamic measurements of pressure make possible diagnosis of the engine operation.
Keywords :
automotive components; birefringence; exhaust systems; fibre optic sensors; light interferometers; pressure sensors; temperature sensors; 100 degC; 140 mbar; 200 kHz; automotive engine exhaust pipe; coherence-addressing principle; dynamic real-time pressure monitoring; engine operation diagnosis; exhaust gas flow determination; fiber-optic automotive sensor; fiber-optic interferometric sensor; highly birefringent fibers; mass emission; polarized modes phase shifts; temperature monitoring; Automotive applications; Engines; Monitoring; Optical fiber polarization; Optical fiber sensors; Phase shifting interferometry; Pressure measurement; Temperature measurement; Temperature sensors; Vehicle dynamics;
Conference_Titel :
Sensors, 2004. Proceedings of IEEE
Print_ISBN :
0-7803-8692-2
DOI :
10.1109/ICSENS.2004.1426148
