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

fYear

1991

Firstpage

62

Lastpage

67

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1991. IMTC-91. Conference Record., 8th IEEE

Conference_Location

Atlanta, GA

Print_ISBN

0-87942-579-2

Type

conf

DOI

10.1109/IMTC.1991.161540

Filename

161540