Device including plural wire detecting coils having faulty coil

Details Device including plural wire detecting coils having faulty coil Device including plural wire detecting coils having faulty coil

1984-09-21

1987-05-12

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

180168, 318587, 324208, 336186, B62D 124, G01V 3165, H01F 2728, G01B 714

Patent

active

046653694

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.

REFERENCES:
patent: 1287251 (1918-12-01), Darley
patent: 2692372 (1954-10-01), Goldstine
patent: 4258813 (1981-03-01), Rubel
patent: 4318093 (1982-03-01), Wood et al.
patent: 4350954 (1982-09-01), Seilly
patent: 4392693 (1983-07-01), Habermann et al.
patent: 4402903 (1983-09-01), Lenderking

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