FIELD: technology for finding concealed objects, for example, underground pipelines.
SUBSTANCE: system includes sensor device, having at least two sensors of magnetic field strength vector, positioned in parallel to each other for detecting only distorted magnetic field; device for transformation of direction and value of distorted magnetic field, detected by sensor device, into values for recording and then displaying values in form of letters, digits or graphic symbols; and magnetic marker, formed of magnetic material and attached to cylindrical pipeline. Magnetic marker has upper part and lower part. Lower part has curved structure, such, that center of magnetic material is perpendicular to ground. Polarity of magnetic field is indicated on upper part of magnetic marker.
EFFECT: error-free detection of position, fast attachment of marker to a pipeline, simple measurement of magnetic field.
7 cl, 9 dwg
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