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AssigneeOMRON Corporation
InventorsKoosuke Harada, Ichiro Sasada, Fumitaka Koga, Nobutomo Matsunaga, Shuichi Misumi
Estimating the term…
Wiring patterns 50, 60 are formed in zigzag fashion on respective ones of both sides of a flexible insulating sheet 70. The wiring patterns 50, 60 include linear portions 50C, 60C and arcuate portions 50A, 60A, respectively. The linear portions 50C and the linear portions 60C overlap. The arcuate portion 60A is situated between two arcuate portions 50A that neighbor each other. One end of each of the wiring patterns 50, 60 is connected to a detection circuit 75 which detects a change in inductance. The other ends of the wiring patterns 50, 60 are connected together through a through-hole 70A. The sheet 70 is disposed in such a manner that the linear portions 50C, 60C will perpendicularly intersect the direction of stress, which is to be measured, acting upon a member 80 undergoing measurement. The sheet 70 and the wiring patterns 50, 60 construct a detection coil 71. An AC excitation current flows through the detection coil 71. When stress is applied to the member 80 undergoing measurement, the permeability of the member changes and so does the inductance of the detection coil 71.
A magnetostrictive stress sensor comprising:
A magnetostrictive stress sensor comprising:
A magnetostrictive stress sensor having a detection coil comprising at least two semicircular coil patterns formed on at least one film in such a manner that linear portions of these coil patterns are made to coincide to construct a circle, said at least two semicircular coil patterns being connected so as to form one current path in such a manner that when a current is passed through these coil patterns, a current will flow through the linear portions of the coil patterns in the same direction and through semicircular arcuate portions of the coil patterns in opposite directions.
A magnetostrictive stress sensor having a detection coil comprising two semicircular coil portions, which are formed by being wound in mutually opposing directions, disposed in such a manner that linear portions are made to coincide to construct a circle, said two coil portions being constituted by a single conductor wire and being so arranged that a current flows through the linear portions of said two coil portions in the same direction when a current is passed through the conductor wire, wherein a core exhibiting a high permeability is provided on one face of the detection coil.
Dependencies are inferred from the claim text.