DUAL GAP OPTICAL FIBER SENSOR SYSTEM WITH A PHASE COMPENSATING ALGORITHM CAPABLE OF OBTAINING A PHASE DIFFERENCE OF 90 DEGREES

摘要

PURPOSE: A dual gap optical fiber sensor system with a phase compensating algorithm is provided to compensate an initial phase difference generated in each optical fiber sensor, thereby maintaining high performance without an additional device or a precise manufacture.;CONSTITUTION: A dual gap optical fiber sensor system with a phase compensating algorithm comprises a light source unit, a beam splitter(120), a second light circulating device(140), a first optical fiber sensor(150), a second optical fiber sensor(160), a first light detecting device(170), a second light detecting device(180), and a signal processing unit(190). The light source outputs lights of a short frequency. The beam splitter disperses the light incident from the light source unit at a ratio of 50:50. The first optical fiber sensor reflects the lights transmitted from the first light circulating device as sinusoidal waves. The second optical fiber sensor reflects the lights transmitted from the second light circulating device as the sinusoidal waves. The first light detecting device converts the lights transmitted from the first light circulating device into voltage, thereby outputting. The second light detecting device converts the lights transmitted from the second light circulating device into the voltage, thereby outputting.;COPYRIGHT KIPO 2013;[Reference numerals] (110) Light source unit; (120) Beam splitter; (130) First light circulating device; (140) Second light circulating device; (150) First optical fiber sensor; (160) Second optical fiber sensor; (170) First light detecting device; (180) Second light detecting device; (190) Signal processing unit