Sensor Arrangement And Method For Using Same
First Claim
1. A sensor arrangement for determining a value of at least one property of a selected object, the sensor arrangement comprising:
- a magnetostrictive element configured to output magnetic signals in response to an alternating magnetic field; and
a first sensor configured to sense a value of a property of the selected object and to provide an electrical resistance that varies in response to variations in the sensed value, the first sensor cooperating with the magnetostrictive element to vary the frequency of the signals output by the magnetostrictive element based on variations of the electrical resistance provided by the first sensor.
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Abstract
A sensor arrangement includes, in some embodiments, a magnetostrictive element configured to output magnetic signals in response to a magnetic field. A sensor is configured to sense a value of a property of a selected object, and to provide an electrical resistance that varies in response to variations in the sensed value. The sensor cooperates with the magnetostrictive element to vary the frequency of the signals output by the magnetostrictive element based on variations of the electrical resistance provided by the sensor. A transmitter provides an alternating magnetic field to the magnetostrictive element, and a receiver picks up the magnetic signals generated by the magnetostrictive element. The frequency of the signals received is correlated with the sensor resistance, and the resistance is correlated to a value of the property sensed.
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Citations
20 Claims
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1. A sensor arrangement for determining a value of at least one property of a selected object, the sensor arrangement comprising:
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a magnetostrictive element configured to output magnetic signals in response to an alternating magnetic field; and a first sensor configured to sense a value of a property of the selected object and to provide an electrical resistance that varies in response to variations in the sensed value, the first sensor cooperating with the magnetostrictive element to vary the frequency of the signals output by the magnetostrictive element based on variations of the electrical resistance provided by the first sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A sensor arrangement for determining a value of at least one property of a selected object, the sensor arrangement comprising:
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a passive transducer configured to output mechanical oscillations at a frequency in response to a magnetic field, the mechanical oscillations generating corresponding magnetic output signals; and a first sensor configured to sense a value of a first property of the selected object and to provide an electrical resistance based on the sensed value, the first sensor cooperating with the transducer such that the frequency of the output signals generated by the transducer is at least in part dictated by the electrical resistance provided by the first sensor. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for determining a value of at least one property of at least one selected object using a sensor arrangement including a passive transducer and a first sensor, the passive transducer being configured to output mechanical oscillations at a frequency in response to a magnetic field, the mechanical oscillations generating corresponding magnetic output signals, the first sensor being configured to sense a value of a first property of the selected object and to provide an electrical resistance based on the sensed value, the first sensor cooperating with the passive transducer such that the frequency of the output signals generated by the passive transducer is at least in part dictated by the electrical resistance provided by the first sensor, the method comprising:
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sensing a value of a first property of the selected object; ringing the passive transducer with a magnetic field, thereby generating a ring back output signal from the passive transducer; receiving the output signal generated by the passive transducer; and determining the sensed value of the first property using the output signal received, including correlating the frequency of the output signal received with the resistance of the first sensor, and correlating the resistance of the first sensor with the sensed value. - View Dependent Claims (19, 20)
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Specification