FIBER-OPTICAL SYSTEM MEASURING PHYSICAL QUANTITIES Russian patent published in 1999 - IPC

FIELD: measurement technology. SUBSTANCE: proposed fiber-optical system is used in fiber-optical self-excited systems based on resonance interaction of laser radiation source with microresonator structure in process of construction of multiplex system of microresonator sensors of physical quantities, for example, temperature, pressure, acceleration and so on. Signal from photodetector goes to signal processing unit with frequency output intended to multiplex signals of system of microresonator fiber- optical sensors of physical quantities with the aid of control unit. Control unit is precision digital-to-analog converter with source of stable reference voltage whose output signal is used to regulate pumping current of fiber-optical laser to multiplex signals of system of fiber-optical sensors with frequency output. Number of measurement channels in system is limited by range of change of output frequency of each measurement head under influence of measured effect. Each measurement head operates on its frequency scanned by pumping current of fiber-optical laser which is set by means of control unit. EFFECT: improved characteristics of measurement system thanks to increase of its stability. 1 dwg