Transducer-based sensor system with multiple drive signal variants
First Claim
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1. A sensor system, comprising:
- a plurality of transducer groups, each containing a plurality of transducers in operative proximity with a sample material,where each transducer within each transducer group is actuated by receiving a different phase-shifted variant of a local oscillator signal, andwhere the phase-shifted variants of the local oscillator signal are selectively filtered during output processing to inhibit cross-transducer interference occurring between simultaneously active transducers.
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Abstract
A sensor system including a plurality of transducer groups, with each transducer group having a plurality of transducers. The transducers of each group are adapted to be placed in operative proximity with a sample material. Within each transducer group, each transducer is actuable via application of a different phase-shifted variant of a local oscillator signal to the transducer. The sensor system is also configured so that, for each transducer group, the phase-shifted variants of the local oscillator signal are selectively employed during output processing to inhibit cross-transducer interference occurring between simultaneously active transducers.
19 Citations
39 Claims
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1. A sensor system, comprising:
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a plurality of transducer groups, each containing a plurality of transducers in operative proximity with a sample material, where each transducer within each transducer group is actuated by receiving a different phase-shifted variant of a local oscillator signal, and where the phase-shifted variants of the local oscillator signal are selectively filtered during output processing to inhibit cross-transducer interference occurring between simultaneously active transducers. - View Dependent Claims (2, 3, 4, 5)
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6. A sensor system, comprising:
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a plurality of transducer groups, each including a plurality of transducers for placement in operative proximity to a sample material, and an output processing subsystem configured to isolate output signals for each of the transducers within such transducer group by filtering out signal contributions caused by other simultaneously active transducers within such transducer group; where each transducer within each transducer group is actuated by receiving a different phase-shifted variant of a local oscillator signal, and where the sensor system is configured so that the phase-shifted variants of the local oscillator signal are selectively employed during output processing to inhibit cross-transducer interference occurring between simultaneously active transducers. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A transducer-based sensor method, comprising:
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providing multiple different phase-shifted variants of a local oscillator signal to an array of transducers, where such providing includes; applying a first one of the phase-shifted variants to a first transducer in the array; and applying a second one of the phase-shifted variants to a second transducer in the array; and filtering output signals from individual transducers in the array, where such littering is performed based on frequency to selectively remove signal components containing cross-transducer noise. - View Dependent Claims (19, 20, 21, 22, 26)
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23. A transducer-based sensor method, comprising:
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providing multiple different phase-shifted variants of a local oscillator signal to an array of transducers, where such providing includes; applying a first one of the phase-shifted variants to a first transducer in the array; and applying a second one of the phase-shifted variants to a second transducer in the array; and filtering outputs of the transducers based on frequency to remove cross-transducer noise components and thereby obtain separate noise-free output signals corresponding to the first and second transducers.
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24. A transducer-based sensor method, comprising:
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providing multiple different phase-shifted variants of a local oscillator signal to an array of transducers, where such providing includes; applying a first one of the phase-shifted variants to a first transducer in the array; and applying a second one of the phase-shifted variants to a second transducer in the array; filtering output signals from individual transducers in the array, where such filtering is performed based on at least one of frequency and phase to remove signal components containing cross-transducer noise; and using the phase-shifted variants of the local oscillator signal to process output signals produced by the first and second transducers. - View Dependent Claims (25)
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27. A transducer-based sensor system, comprising:
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a transducer array including a plurality of transducers for placement in operative proximity to a sample material; an oscillator network operatively coupled with the transducer array and configured to apply phase-shifted variants of a local oscillator signal to the plurality of transducers, where at least some of the plurality of transducers are actuated with different phase-shifted variants of the local oscillator signal; and an output processing subsystem configured to filter output signals received from individual transducers in the transducer array, where the output processing subsystem is configured to perform such filtering based on frequency to remove cross-transducer noise components from such output signals. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 37)
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35. A transducer-based sensor system, comprising:
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a transducer array including a plurality of transducers for placement in operative proximity to a sample material; an oscillator network operatively coupled with the transducer array and configured to apply phase-shifted variants of a local oscillator signal to the plurality of transducers, where at least some of the plurality of transducers are actuated with different phase-shifted variants of the local oscillator signal; and an output processing subsystem configured to filter output signals received from individual transducers in the transducer array, where the output processing subsystem is configured to perform such filtering based on frequency to remove cross-transducer noise components from such output signals; where the transducer array includes a plurality of groups, each including a plurality of transducers; and where for each transducer within each transducer group, such transducer is driven by one of the phase-shifted variants, and the same phase-shifted variant is employed within an output signal path of such transducer to facilitate filtering out signal contributions caused by other simultaneously active transducers within such transducer group. - View Dependent Claims (36)
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38. A transducer-based sensor system, comprising:
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means for providing multiple different phase-shifted variants of a local oscillator signal to an array of transducers, where such means includes; means for applying a first one of the phase-shifted variants to a first transducer in the array; and means for applying a second one of the phase-shifted variants to a second transducer in the array; and means for filtering output signals from individual transducers in the array, where such filtering is performed based on at least one of frequency and phase to remove signal components containing cross-transducer noise.
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39. A sensor system, comprising:
a plurality of transducer groups, each including a plurality of transducers for placement in operative proximity with a sample material, and an output processing subsystem configured to isolate output signals for each of the transducers within such transducer group by filtering out signal contributions caused by other simultaneously active transducers within such transducer group based on phase-shifted variations between the signal contributions.
Specification