Method and apparatus for the location and indication of cable splices and cable faults
AssigneeHagenuk KMT Kabelmesstechnik GmbH
InventorVolker Fraedrich
Life of this patent
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Abstract
A method and apparatus for the location and indication of cable splices and cable faults is disclosed. An audio frequency generator can be coupled to a cable under test and the magnetic field generated by the cable can be monitored by a receiver. A receiver includes at least two antenna coils situated to detect orthogonal components of the magnetic field. From test values measured at various test points along the cable route, a degree of inhomogeneity of the magnetic field along the cable route can be determined and displayed. Location of a cable fault and cable splice is then apparent in the display.
Claims15
A method of locating cable splices and cable faults, comprising:
- coupling an audio frequency generator to a cable to provide a magnetic field at an audio frequency;
- receiving at least two orthogonal components of the magnetic field at a receiver;
- generating test values corresponding to the orthogonal components of the magnetic field along the cable route, wherein generating test values includes:
- amplifying signals from a first antenna coil and a second antenna coil to produce amplified signals;
- filtering the amplified signals to produce filtered signals;
- and
- digitizing the filtered signals to produce test values;
- entering the test values at a plurality of test points on the cable route to a test value memory;
- determining a degree of inhomogeneity along the cable route from the test values in the test value memory;
- and
- displaying the degree of inhomogeneity.
A method of locating cable splices and cable faults, comprising:
- coupling an audio frequency generator to a cable to provide a magnetic field at an audio frequency;
- receiving at least two orthogonal components of the magnetic field at a receiver;
- detecting a first component of the magnetic field with a first antenna coil;
- detecting a second component of the magnetic field with a second antenna coil oriented orthogonally to the first antenna coil;
- generating test values corresponding to the orthogonal components of the magnetic field along the cable route, wherein generating test values includes:
- amplifying signals from the first antenna coil and the second antenna coil to produce amplified signals;
- filtering the amplified signals to produce filtered signals;
- and
- digitizing the filtered signals to produce the test values;
- and
- entering the test values at a plurality of test points on the cable route to a test value memory;
- determining a degree of inhomogeneity along the cable route from the test values in the test value memory;
- and
- displaying the degree of inhomogeneity.
An apparatus for finding cable splices and cable faults, comprising:
- means for coupling an audio frequency generator to a cable to provide a magnetic field at an audio frequency;
- means for detecting two orthogonal components of the magnetic field from the cable;
- means for obtaining test values coresponding to the orthogonal components of the magnetic field at test points along the cable, wherein wherein obtaining test values includes:
- amplifying signals from a first antenna coil and a second antenna coil to produce amplified signals;
- filtering the amplified signals to produce filtered signals;
- and
- digitizing the filtered signals to produce test values;
- means for determining a degree of inhomogeneity in the magnetic field along the cable from the test values;
- and
- means for displaying the degree of inhomogeneity in the magnetic field.
Dependencies are inferred from the claim text.