DEVICE FOR DETERMINING DISTANCE TO CABLE RAPTURE POINT Russian patent published in 2010 - IPC G01R31/08 

FIELD: physics.

SUBSTANCE: device has an oscillating LC circuit connected to a controlled oscillation frequency generator. The generator is connected through a switch to two resonance frequency memory units which correspond to the measured and unknown lengths of the cable. The resonance frequency memory units are connected to a computer of the unknown cable length on the functional:, where fo is natural frequency of the LC circuit, f₁ is resonance frequency corresponding to the measured cable length, fx is resonance frequency corresponding to the unknown cable length to the point of rapture. The unknown length l_x is calculated by the computer using the formula: l_x = l₁·F, where: I₁ is the measured cable length corresponding to the resonance frequency f₁. The computer is connected to a cable length indicator.

EFFECT: simplification, reduced errors and increased safety.

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