SYSTEM AND METHOD FOR SOFT-FIELD TOMOGRAPHY DATA ACQUISITION
First Claim
1. A soft-field tomography measurement system comprising:
- a plurality of transducers configured for positioning proximate a surface of an object, wherein the plurality of transducers correspond to a plurality of channels;
an excitation driver coupled to the plurality of channels and configured to generate excitation signals for the plurality of transducers;
a single reference excitation source from which excitations are generated;
one or more derived excitation sources, wherein one or more of the derived excitation sources derive excitations from the single reference excitation source and the derived excitations are applied to each of the plurality of channels;
a response detector configured to measure a response at each of the plurality of transducers; and
a reduced bit digitizer in each of the plurality of channels configured to digitize a measured response difference between the measured response at one or more of the transducers and at least one of an excitation of the single reference excitation source or an excitation derived from the single reference excitation source or a separate reference.
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Abstract
A system and method for soft-field tomography data acquisition are provided. One system includes a plurality of transducers that correspond to a plurality of channels, and an excitation driver coupled to generate excitation signals for the plurality of transducers. The system also includes a single reference excitation source from which excitations are generated and one or more derived excitation sources. The one or more derived excitation sources derive excitations from the single reference excitation source that are applied to each of the plurality of channels. The system further includes a response detector and a reduced bit digitizer in each of the plurality of channels configured to digitize a measured response difference between the measured response at one or more of the transducers and at least one of an excitation of the single reference excitation source or an excitation derived from the single reference excitation source or a separate reference.
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Citations
23 Claims
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1. A soft-field tomography measurement system comprising:
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a plurality of transducers configured for positioning proximate a surface of an object, wherein the plurality of transducers correspond to a plurality of channels; an excitation driver coupled to the plurality of channels and configured to generate excitation signals for the plurality of transducers; a single reference excitation source from which excitations are generated; one or more derived excitation sources, wherein one or more of the derived excitation sources derive excitations from the single reference excitation source and the derived excitations are applied to each of the plurality of channels; a response detector configured to measure a response at each of the plurality of transducers; and a reduced bit digitizer in each of the plurality of channels configured to digitize a measured response difference between the measured response at one or more of the transducers and at least one of an excitation of the single reference excitation source or an excitation derived from the single reference excitation source or a separate reference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A multi-channel application specific integrated circuit (ASIC) comprising:
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a single reference excitation source configured to generate at least one excitation for driving each of a plurality of channels of a soft-field tomography system; one or more derived excitation sources, configured to generate excitations derived from the single reference excitation source; a response detector configured to measure a response at each of a plurality of transducers in each of the plurality of channels; and a reduced bit digitizer having fewer bits than the number of bits of the single reference excitation source and configured to digitize an output of the response detector. - View Dependent Claims (17, 18, 19, 20)
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21. A method for providing excitation and data acquisition for a soft-field tomography system, the method comprising:
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deriving one or more excitations from at least one reference excitation source which are applied to a plurality of channels of the soft-field tomography system; measuring at least one difference between the excitation applied at one or more transducers corresponding to the plurality of channels and a reference excitation; and digitizing the measured difference using a reduced number of data bits. - View Dependent Claims (22, 23)
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Specification