Vibrating wire sensor using spectral analysis

Abstract

Systems and methods for analyzing the resonant frequency of vibratory wires within vibratory wire gauges. The resonant frequency of the vibrating wire is determined by using an interface that digitizes the response of an excited wire in the gauge. A transform then converts the digitized data into a frequency spectrum. The resulting spectrum is used to estimate the resonant frequency of the vibrating wire. The resulting measurement or estimate of the resonant frequency can be used to measure or determine some physical characteristic of the device or structure or system connected to the gauge.

Description

technical field [0001] The present invention generally relates to sensors. More specifically, embodiments of the present invention relate to vibrating wire gauges. Background technique [0002] Vibrating wire meters are used in a wide variety of applications, including measuring various properties and forces in construction projects, including buildings, bridges, dams, piles, tunnel linings, pipelines, anchorage and others. The vibrating wire instrument has been adapted to monitor stress, strain, deflection, pressure, displacement, liquid level, angular motion and temperature. Although advances in technology have produced other types of sensors, vibrating wire meters are often considered the best sensors for use in many environments due to the sensor's long-term reliability. [0003] The vibrating wire instrument generally works on the vibrating wire principle, which stipulates that when the wire is plucked, it vibrates at its resonant frequency. The resonant frequency is...

AI Technical Summary

Problems solved by technology

Although these methods are computationally efficient, they often suffer from errors due to their inability to distinguish string resonances from external noise sources

In particular, noise sources with smaller amplitudes and different frequencies than the vibrating wire can introduce substantial errors

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