Apparatus for measuring the positions of plural movable members each associated with a respective magnetorestrictive element
First Claim
1. Measuring apparatus for generating a multidigit representation of a value of a variable, said apparatus comprising:
- a plurality of movable members, each corresponding to a respective one of said digits and movable to different positions in response to variation in the value of said variable so that the positions of said members are indicative of the values of said digits;
a plurality of magnetic field generators associated respectively with said respective movable members, each said generator generating an alternating magnetic field having a parameter which varies as a function of the position of the respective movable member, said alternating fields being at different frequencies from each other such as to be distinguishable from each other;
an exciting signal generator coupled in common to said magnetic field generators for applying thereto exciting signals at said different respective frequencies; and
an output signal generator coupled in common to said magnetic field generators for producing a plurality of output signals, each corresponding to a respective one of said generated alternating magnetic fields and each having a value dependent upon the value of said varying parameter of the corresponding alternating magnetic field.
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Accused Products
Abstract
Apparatus for indicating the value of a variable comprising first and second members moveable relative to each other as a function of said variable, a plurality of elements of a first type on one of said members, at least one element of a second type on the other of said members, one of said types being magnetostrictive and the other being operative to produce a magnetic bias field, said elements being arranged so that as said first and second members move relative to each other different ones of said plurality of elements of said first type magnetically interact with said at least one element of said second type such that, for different positions of said members, said interaction causes magnetostrictive resonance at different frequencies in response to an alternating interrogating magnetic field at said different frequencies.
74 Citations
14 Claims
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1. Measuring apparatus for generating a multidigit representation of a value of a variable, said apparatus comprising:
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a plurality of movable members, each corresponding to a respective one of said digits and movable to different positions in response to variation in the value of said variable so that the positions of said members are indicative of the values of said digits; a plurality of magnetic field generators associated respectively with said respective movable members, each said generator generating an alternating magnetic field having a parameter which varies as a function of the position of the respective movable member, said alternating fields being at different frequencies from each other such as to be distinguishable from each other; an exciting signal generator coupled in common to said magnetic field generators for applying thereto exciting signals at said different respective frequencies; and an output signal generator coupled in common to said magnetic field generators for producing a plurality of output signals, each corresponding to a respective one of said generated alternating magnetic fields and each having a value dependent upon the value of said varying parameter of the corresponding alternating magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Measuring apparatus comprising:
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a plurality of measuring members, each being movable in response to variation in a variable to be measured to positions indicative of the variable; a plurality of magnetic field generators associated respectively with said respective movable members, each said generator generating an alternating magnetic field, said alternating fields being at different frequencies from each other such as to be distinguishable from each other; an exciting signal generator coupled in common to said magnetic field generators and for applying thereto exciting signals at said different respective frequencies; and an output signal generator coupled in common to said magnetic field generators for producing a plurality of output signals, each corresponding to a respective one of said generated alternating magnetic fields and each having a value dependent upon the position of the corresponding measuring member. - View Dependent Claims (11, 12, 13, 14)
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Specification