Method for monitoring a body inserted in a conduit and insert for electromagnetic resonance measurements

摘要

Method for monitoring a body inserted in pipe conducting a fluid flow, the body being positioned in a distance from the pipe wall providing a gap between the body and the pipe wall, the gap constituting an electromagnetic, e.g. microwave, resonator, at least one coupling probe being positioned close to said gap, the method comprising the steps of applying an electromagnetic signal, monitoring the frequency response of the resonator through the probe, and analyzing the frequency response to provide a measure of movements, e.g. vibrations induced by a turbulent flow, of the body. The invention also relates to an insert with support structure especially shaped to avoid influence on the resonance measurement.

主权项

1. A method for monitoring a body inserted in a conduit, the method comprising:
positioning the body a distance from a wall of the conduit thereby providing a gap between the body and the wall of the conduit, the gap constituting an electromagnetic resonator, at least one coupling probe being positioned close to said gap; applying an electromagnetic signal at a frequency higher than that required for meter measurements; monitoring a frequency response of a resonator through the coupling probe; and analyzing the frequency response to provide a measure of movements of the body induced by a turbulent flow.