Monitoring system, safety cable and tube for such a system, and method for operating a monitoring system
AssigneeLEONI Kabel GmbH
InventorsErwin Koeppendoerfer, Johannes Nachtrab
Life of this patent
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Abstract
A monitoring system contains a safety cable that has at least one line along which a fault sensor device extends. The safety cable has a capacitor with two electrodes and an inductor which is made of a conductor that is electrically connected to one of the electrodes such that a series resonant circuit is formed. By ascertaining a resonant frequency of the series resonant circuit, the state of the safety cable, in particular the wear of the safety cable, is determined and a possible future fault is predicted in particular. A corresponding safety cable in particular in the form of a prefabricated material available by the meter and a method for operating the monitoring system are described.
Claims21
A monitoring system, comprising:
- a safety cable containing at least one line and a malfunction sensor system extending along said at least one line, said malfunction sensor system having a capacitor with two electrodes and an inductor being formed by a conductor that is electrically connected to one of said electrodes in such a manner that a series resonant circuit is formed, said two electrodes each being configured as a shielding layer and completely enclose said at least one line.
A monitoring system, comprising:
- a tube;
- and
- a malfunction sensor system extending along said tube, said malfunction sensor system having a capacitor with two electrodes and an inductor that is formed by means of a conductor that is electrically connected to one of said electrodes in such a manner that a series resonant circuit is formed, said two electrodes each being configured as a shielding layer and completely enclose said tube.
A tube for a monitoring system, comprising:
- a capacitor extending along a length of the tube, said capacitor having two electrodes and an inductor that is formed by means of a conductor, said two electrodes each being configured as a shielding layer and completely enclose the tube.
A safety cable for a monitoring system, the safety cable comprising:
- at least one line;
- and
- a malfunction sensor system extending along said at least one line, said malfunction sensor system having a capacitor with two electrodes and an inductor that is formed by a conductor that is electrically connected to one of said electrodes in such a manner that a series resonant circuit is formed, said two electrodes each being configured as a shielding layer and completely enclose said at least one line.
A method for operating a monitoring system having a safety cable with at least one line and a malfunction sensor system extending along the at least one line, the malfunction sensor system having a capacitor with two electrodes and an inductor formed by a conductor that is electrically connected to one of the electrodes in such a manner that a series resonant circuit is formed, the two electrodes each being configured as a shielding layer and completely enclose the at least one line, which comprises the steps of:
- ascertaining a resonance frequency of the malfunction sensor system;
- comparing the resonance frequency with a predetermined normal frequency;
- and
- outputting a signal if the resonance frequency deviates from the normal frequency by a predetermined minimum value.
Dependencies are inferred from the claim text.