SYSTEM TO MEASURE A RESONANT FREQUENCY OF A VIBRATING-WIRE SENSOR USING A DIGITAL COUNTER, CAPABLE OF MONITORING THE CHANGE OF A STRUCTURE BY MEASURING THE LENGTH CHANGE OF A STRUCTURE

摘要

PURPOSE: A system to measure a resonant frequency of a vibrating-wire sensor using a digital counter is provided to reduce calculation of a processor.;CONSTITUTION: A processor(41) compares a count result value with a consumed time and calculates resonance frequency. An excitation signal interface(43) for a vibrating-wire sensor converts a received signal into an excited signal. A vibrating-wire sensor(42) outputs a natural frequency signal in response to the excited signal. The excitation signal interface(44) receives the natural frequency signal from the vibrating-wire sensor and outputs it to a processor. A signal converter(45) changes the amplified natural frequency signal into a digital signal. A counter(46) counts the digital natural frequency signal and output a result to the processor.;COPYRIGHT KIPO 2011