B - Operations – Transporting – 61 – L
Patent
B - Operations, Transporting
61
L
340/77, 340/124.
B61L 1/04 (2006.01) G01P 13/00 (2006.01) G06M 7/00 (2006.01)
Patent
CA 1145828
ABSTRACT OF THE DISCLOSURE A transducer having a field creating coil arrangement which produces a field having a field strength minimum, having a sensing coil positioned at that field strength minimum and responsive to changes in position of that minimum resulting from the proximity of an article to the field creating coil arrangement. By observing changes in the signal output of the sensing coil, infor- mation concerning the proximity of an article to the transducer is ascertained. Preferably the transducer includes a field disturbing means associated therewith for inducing a disturbance of the field created by the field creating coil so as to cause the sensing coil to operate by either simulating the disturbance of the field that would be caused by the proximity of an article or by disturbing the field while the article is present. Thus the transducer may be remotely checked as to its operation.
318043
Finch (colin) Investments Pty. Ltd.
Sherman
LandOfFree
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