Referenced Items are not available for this document.
We present a lock-in detection scheme, which simultaneously computes the amplitude and phase of several signals using nonsinusoidal references that have odd harmonics only. By stating constraints on the frequencies of the references and on the measurement time, we guarantee perfect discrimination of the sources. Using square-wave references, we simplify the lock-in algorithm, rendering it suitable to an implementation directly in logic. Furthermore, we apply this scheme to the design of a moisture sensor for industrial real-time measurement applications.
Published in:
Instrumentation and Measurement, IEEE Transactions on
(Volume:62
,
Issue:
4
)
Date of Publication: April 2013
- Page(s):
- 785 - 793
- ISSN :
- 0018-9456
- INSPEC Accession Number:
- 13357487
- Digital Object Identifier :
- 10.1109/TIM.2013.2240095
- Product Type:
- Journals & Magazines
- Date of Publication :
- 06 February 2013
- Date of Current Version :
- 08 March 2013
- Issue Date :
- April 2013
- Sponsored by :
- IEEE Instrumentation and Measurement Society
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