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Vectoring

A mathematical manipulation used for instruments such as inclinometers and multi-axis crack meters where the direction and magnitude of movement is not in alignment with a specific axis e.g. A axis.

Vibrating wire interface

A vibrating wire interface is used to excite VW sensors and on measuring the response performs a Fourier transform which converts the signal frequency into a digital signal e.g. RS 232 which can be inputted to a data logger or incorporated within a readout circuit.

Vibrating wire technology

A vibrating wire element consists of a tensioned wire and a magnetic coil which is used to pluck and measure the resonant frequency of the wire.

Vibrating wire elements can be incorporated into many types of instruments including piezometers, strain gauges, pressure transducers and displacement gauges where the square of the resonant frequency of the wire is directly proportional to the measurand.

The primary advantage of vibrating wire sensors is that the output is in the form of frequency rather than a magnitude of voltage or resistance and therefore undesirable effects such as cable resistance, contact resistance and earth leakage are negligible. Very long lengths (over 2000m) of cable are possible.