Magnetostrictive position transducer having square-wave-in-quadrature-output
First Claim
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1. A magnetostrictive transducer for generating an indication of a magnet position along a magnetostrictive gauge comprising:
- a magnetostrictive waveguide delay line;
pulse generator means for generating interrogation pulses on said delay line, in response to interrogation pulses on said delay line, in response to interrogate signals;
said magnet proximate said delay line, for converting interrogation pulses into acoustic pulses in said delay line, at the location of said magnet means;
mode converter means coupled to said wave guide for converting said acoustic pulses into corresponding echo signals;
time interval measuring means for measuring the time interval from interrogation signals to the reception of corresponding echo signals, and for generating a raw count value corresponding to said time measurement;
output conversion means for converting said raw count value to a plurality of quadrature pulses where the number of quadrature pulses indicates the position of said magnet on said waveguide.
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Abstract
A magnetostrictive position measuring instrument for generating square-wave-in-quadrature output pulses indicating magnet position along a waveguide.
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Citations
11 Claims
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1. A magnetostrictive transducer for generating an indication of a magnet position along a magnetostrictive gauge comprising:
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a magnetostrictive waveguide delay line; pulse generator means for generating interrogation pulses on said delay line, in response to interrogation pulses on said delay line, in response to interrogate signals; said magnet proximate said delay line, for converting interrogation pulses into acoustic pulses in said delay line, at the location of said magnet means; mode converter means coupled to said wave guide for converting said acoustic pulses into corresponding echo signals; time interval measuring means for measuring the time interval from interrogation signals to the reception of corresponding echo signals, and for generating a raw count value corresponding to said time measurement; output conversion means for converting said raw count value to a plurality of quadrature pulses where the number of quadrature pulses indicates the position of said magnet on said waveguide. - View Dependent Claims (5)
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2. A magnetostrictive transducer for generating an indication of a magnet position along a magnetostrictive gauge comprising:
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a magnetostrictive waveguide delay line; pulse generator means for generating interrogation pulses on said delay line, in response to interrogation pulses on said delay line, in response to interrogate signals; said magnet proximate said delay line, for converting interrogation pulses into acoustic pulses in said delay line, at the location of said magnet means; mode converter means coupled to said waveguide for converting said acoustic pulses into corresponding echo signals; time interval measuring means for measuring the time interval from interrogation signals to the reception of corresponding echo signals, and for generating a raw count value corresponding to said time measurement; index position means for determining the count value for a defined index location along said waveguide and for producing an index value corresponding to said index location; output conversion means for generating an index pulse each time said magnet moves past said index location.
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3. A magnetostrictive transducer for generating an indication of a magnet position along a magnetostrictive gauge comprising:
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a magnetostrictive waveguide delay line; pulse generator means for generating interrogation pulses on said delay line, in response to interrogation pulses on said delay line, in response to interrogate signals; said magnet proximate said delay line, for converting interrogation pulses into acoustic pulses in said delay line, at the location of said magnet means; mode converter means coupled to said waveguide for converting said acoustic pulses into corresponding echo signals; time interval measuring means for measuring the time interval from interrogation signals to the reception of corresponding echo signals, and for generating a raw count value corresponding to said time measurement; index position means for determining the count value for a defined location along said waveguide and for producing an index value corresponding to said index location; output conversion means for generating a fixed burst of output pulses corresponding to the distance of said magnet from said index location.
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4. A magnetostrictive transducer for generating an indication of a magnet position along a magnetostrictive gauge comprising:
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a magnetostrictive waveguide delay line; pulse generator means for generating interrogation pulses on said delay line, in response to interrogation pulses on said delay line, in response to interrogate signals; said magnet proximate said delay line, for converting interrogation pulses into acoustic pulses in said delay line, at the location of said magnet means; mode converter means coupled to said waveguide for converting said acoustic pulses into corresponding echo signals; time interval measuring means for measuring the time interval from interrogation signals to the reception of corresponding echo signals, and for generating a raw count value corresponding to said time measurement; gradient measuring means for computing the transmission gradient of said waveguide for establishing a gradient value; output conversion means for converting said raw count value and said gradient value, to an output signal indicative of the position of said magnet on said waveguide. - View Dependent Claims (11)
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6. A magnetostrictive transducer for generating an indication of a magnet position along a magnetostrictive gauge comprising:
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a magnetostrictive waveguide delay line; pulse generator means for generating interrogation pulses on said delay line, in response to interrogation pulses on said delay line, in response to interrogate signals; said magnet proximate said delay line, for converting interrogation pulses into acoustic pulses in said delay line, at the location of said magnet means; mode converter means coupled to said waveguide for converting said acoustic pulses into corresponding echo signals; time interval measuring means for measuring the time interval from interrogation signals to the reception of corresponding echo signals, and for generating a raw count value corresponding to said time measurement; index position means for determining the count value for a defined index location at an arbitrarily selected position along said waveguide and for producing an index value corresponding to said index location; output conversion means for generating an index output pulse each time said magnet moves past said index location. - View Dependent Claims (7, 8, 9, 10)
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Specification