Title :
A new frequency control method in oscillator and its application to sensor
Author :
Kohata, Minoru ; Takagi, Tasuku
Author_Institution :
Fac. of Eng., Tohoku Univ., Sendai, Japan
Abstract :
A structure of an oscillator and its frequency control method are proposed and applied to a sensory system. The structure of the oscillator has two feedback loops, one of which is modulated by a physical value to be measured. The oscillation frequency can be modulated by the amplitude or the phase of the feedback signal. Then this system is a frequency modulation (FM)-type measuring system. The proposed oscillator, whose frequency is controlled by the amplitude of the feedback signal, is applied to a fibre optic snowfall-weight remote sensing system
Keywords :
feedback; fibre optic sensors; frequency control; frequency modulation; mass measurement; oscillators; remote sensing; transducers; FM transducers; Wien bridge oscillator; feedback loops; fibre optic sensor; frequency control; frequency modulation; hydraulic power plant; optical weight sensor; oscillator; sensor; snowfall-weight remote sensing; Amplitude modulation; Control systems; Feedback loop; Frequency control; Frequency measurement; Frequency modulation; Optical control; Optical feedback; Oscillators; Phase modulation;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1991. IMTC-91. Conference Record., 8th IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-87942-579-2
DOI :
10.1109/IMTC.1991.161540
