Method for monitoring a line for unchanged ambient conditions and measuring arrangement for monitoring a line for changed ambient conditions
AssigneeLEONI Kabel GmbH
InventorBernd Janssen
Life of this patent
Estimating the term…
Abstract
A method monitors a line for changed ambient conditions. The line has a measuring line with a predetermined length and a measuring conductor surrounded by insulation having a known dielectric constant. In the method, an analog signal having a predetermined frequency is generated, the signal is divided into a reference signal and an operating signal, the operating signal is fed into the measuring conductor, a return signal obtained from the operating signal is combined with the reference signal and by a phase shift between the reference signal and the return signal, a measure is determined for the changed condition, particularly for a temperature change.
Claims8
A method for monitoring a line for changed ambient conditions, the line having a measuring line with a predetermined length and a measuring conductor surrounded by insulation, which comprises the steps of:
- generating an analog signal being a periodic signal having a predetermined frequency;
- dividing the analog signal into a reference signal and an operating signal;
- feeding the operating signal into the measuring conductor;
- combining a return signal obtained from the operating signal with the reference signal, wherein the return signal, under normal conditions, having a run time to be expected and under ambient conditions deviating from the normal conditions, a maximum run time difference to be expected and wherein a frequency is tuned to the maximum run time difference to be expected in such a manner that a phase shift is ≤180° by amount;
- and
- determining a measure for a changed condition by means of a phase shift between the reference signal and the return signal.
A method for monitoring a line for changed ambient conditions, the line having a measuring line with a predetermined length and a measuring conductor surrounded by insulation, which comprises the steps of:
- generating an analog signal being a periodic signal having a predetermined frequency;
- dividing the analog signal into a reference signal and an operating signal;
- feeding the operating signal into the measuring conductor;
- combining a return signal obtained from the operating signal with the reference signal, wherein the return signal, under normal conditions, having a run time to be expected and under ambient conditions deviating from the normal conditions, a maximum run time difference to be expected and wherein a frequency is tuned to the maximum run time difference to be expected in such a manner that a phase shift is ≤180° by amount;
- and
- superimposing the reference signal and the return signal to form a resultant signal and from an amplitude of the resultant signal, a measure is determined for a changed condition.
Dependencies are inferred from the claim text.