Device including plural wire detecting coils having faulty coil sensing capabilities for the directional guidance of the trackless vehicle
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United States of America Patent
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May 12, 1987
Grant Date -
N/A
app pub date -
Sep 21, 1984
filing date -
Sep 23, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method and device for measuring two orthogonal electromagnetic field components using a cross coil and for evaluating the components in the distance measurement in electronically course-steered vehicles (13). For rapid and ensured detection of malfunctions of the distance measuring system, use is made of an antenna effecting concurrent positionally and timewise measurements, and with the coils each consisting of bifilar or trifilar coil wires representing a redundant measuring system. A monitoring unit is used to continuously compare the signals generated by the various wires of the antenna when scanning the magnetic field. When a malfunction occurs in one of the channels, vehicle steering control is continued by the respective other channel and the defect is indicated via the monitoring unit. As monitoring signals, use can also be made of direct currents superimposed in the coils.
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