DIGITAL ELECTRONICS FOR CONTROLLING A FIBER OPTIC SHEDDING FLOWMETER

摘要

DIGITAL ELECTRONICS FOR CONTROLLING A FIBER OPTIC VORTEX SHEDDING FLOWMETER A digital controlling system for fiber optic vortex shedding flowmeters which provides a new and improved preamp circuit and a computer for correcting temperature, linearity and hysteresis effects. The controlling system overcomes the inherent non-linearity of the vortex shedding phenomena and also provides two-way communication between a central control unit and the fiber optic vortex shedding flowmeter. The improved preamp circuitry increases the low-end range of fiber optic vortex shedding flowmeters.