Measuring system
First Claim
1. A measuring system comprising:
- a magnetic pickup means for responding to magnetic fields;
a magnetic scale formed by a succession of discrete, uniformly spaced scaling units each of which individually consists of a pair of opposed magnetic poles (N,S), the successive pairs of opposed magnetic poles alternating in their magnetic polarities in a direction which is the same as or substantially parallel to a direction in which a deformable member is deformed, said magnetic scale being arranged to be displaced relative to the magnetic pickup means by an amount related to a deformation of the deformable member whereby the magnetic pickup means successively senses the passage of the magnetic scaling units; and
circuit means for counting the number of said magnetic scaling units sensed and producing an electrical output signal representing said deformation, or a physical quantity which is a function thereof.
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Accused Products
Abstract
A measuring system using the magnetic scale and a sensing head measures a deformation of a deformable member and/or one or more physical quantities, e.g. a strain and internal stress of, or an external force to, the member, which are functions of the deformation. The magnetic scale comprises a succession of discrete, uniformly spaced scaling units each of which individually consists of a pair of magnetic poles (N, S). The magnetic scale is arranged to be displaceable relative to the magnetic sensing head in response to a deformation of the deformable member so that the magnetic pickup head successively senses the passage of the magnetic scaling units. An output circuit unit is connected to the magnetic head for counting the number of magnetic scaling units sensed corresponding to the deformation and produces an electrical output signal representative thereof, and/or one or more of the above physical quantities.
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Citations
15 Claims
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1. A measuring system comprising:
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a magnetic pickup means for responding to magnetic fields; a magnetic scale formed by a succession of discrete, uniformly spaced scaling units each of which individually consists of a pair of opposed magnetic poles (N,S), the successive pairs of opposed magnetic poles alternating in their magnetic polarities in a direction which is the same as or substantially parallel to a direction in which a deformable member is deformed, said magnetic scale being arranged to be displaced relative to the magnetic pickup means by an amount related to a deformation of the deformable member whereby the magnetic pickup means successively senses the passage of the magnetic scaling units; and circuit means for counting the number of said magnetic scaling units sensed and producing an electrical output signal representing said deformation, or a physical quantity which is a function thereof. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A measuring system, comprising:
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a magnetic pickup means; a magnetic scale having a succession of discrete, uniformly spaced scaling units each of which individually consists of a pair of magnetic poles (N, S), said magnetic scale being carried by an elongate element resiliently secured to a deformable member and being arranged to be displaced relative to the magnetic pickup means in response to a deformation of said deformable member whereby the magnetic pickup means successively senses the passage of the magnetic scaling units; and circuit means for counting the number of said magnetic scaling units sensed and producing an electrical output signal representing said deformation, or a physical quantity which is a function thereof. - View Dependent Claims (8, 9, 10, 11)
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12. A measuring system, comprising:
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a magnetic pickup means; a magnetic scale formed by a succession of discrete, uniformly spaced scaling units each having a pair of magnetic poles (N, S), said magnetic scale being arranged to be displaced relative to the magnetic pickup means by an amount related to a deformation of a deformable member whereby the magnetic pickup means successively senses the passage of the magnetic scaling units; and circuit means for counting the number of said magnetic scaling units sensed and producing an electrical output signal representing said deformation, or a physical quantity which is a function thereof, said magnetic scale being formed along an arc on a rotary member to which a load is applied at a point thereon between said arc and the axis of rotation of said rotary member in response to said deformation of said deformable member. - View Dependent Claims (13, 14, 15)
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Specification