Patent US6044332A successfully refreshed from Google Patents.
US6044332A
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Surface acoustic wave harmonic analysis
Assignee: Lockheed Martin Energy Research Corp
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Filing: 1998-04-15
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Granted: 2000-03-28
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Expires: 2018-04-15
Abstract
Abstract A method for sensing and analyzing data with surface acoustic wave (SAW) devices comprises the steps of: propagating a sampling signal at a fundamental frequency through a SAW device coated for selective adsorption; measuring at least one parameter of at least one higher order harmonic of the fundamental frequency sampling signal; exposing the coated SAW device to enable the selective adsorption; measuring the at least one parameter of the at least one higher order harmonic of the fundamental frequency sampling signal after the exposing step; comparing the measurements of the at least one parameter of the at least one higher order harmonic before and after the exposing step; and, deriving a result of the selective adsorption based upon the comparing step. The at least one parameter is harmonic power and harmonic frequency. The at least one higher order harmonic is one or more odd harmonics.
Inventors
- 👤 Kofi Korsah
- 👤 William B. Dress
- 👤 Cheng Yu Ma
- 👤 Michael R. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:13
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/24; G01N29/2462; G01N29/02; G01N29/022; G01N29/2468; G01N29/44; G01N29/46; G01N2291/00; G01N2291/01; G01N2291/014; G01N2291/02; G01N2291/021; G01N2291/0212; G01N2291/025; G01N2291/0256; G01N2291/04; G01N2291/042; G01N2291/0423
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
121 words
A method for sensing and analyzing data with surface acoustic wave (SAW) devices, comprising the steps of: propagating a sampling signal at a fundamental frequency through a SAW device coated for selective adsorption; measuring at least one parameter of at least one higher order harmonic of said fundamental frequency sampling signal; exposing said coated SAW device to enable said selective adsorption; measuring said at least one parameter of said at least one higher order harmonic of said fundamental frequency sampling signal after said exposing step; comparing said measurements of said at least one parameter of said at least one higher order harmonic before and after said exposing step; and, deriving a result of said selective adsorption based upon said comparing step.
Claim 2
Independent Claim
121 words
A method for sensing and analyzing data with surface acoustic wave (SAW) devices, comprising the steps of: propagating a sampling signal at a fundamental frequency through a SAW device coated for selective adsorption; measuring at least one parameter of at least one higher order harmonic of said fundamental frequency sampling signal; exposing said coated SAW device to enable said selective adsorption; measuring said at least one parameter of said at least one higher order harmonic of said fundamental frequency sampling signal after said exposing step; comparing said measurements of said at least one parameter of said at least one higher order harmonic before and after said exposing step; and, deriving a result of said selective adsorption based upon said comparing step.
Claim 3
Dependent Claim
14 words
The method of claim 1, wherein said at least one parameter is harmonic power.
Claim 4
Dependent Claim
14 words
The method of claim 2, wherein said at least one parameter is harmonic frequency.
Claim 5
Dependent Claim
14 words
The method of claim 1, wherein said at least one parameter is harmonic frequency.
Claim 6
Dependent Claim
17 words
The method of claim 1, wherein said at least one higher order harmonic is an odd-numbered harmonic.
Claim 7
Dependent Claim
19 words
The method of claim 1, wherein said at least one higher order harmonic is at least a 3rd harmonic.
Claim 8
Dependent Claim
25 words
The method of claim 1, wherein said at least one higher order harmonic is at least two of a 3rd harmonic and a 5th harmonic.
Claim 9
Dependent Claim
18 words
The method of claim 7, comprising the step of generating and measuring said at least two harmonics sequentially.
Claim 10
Dependent Claim
21 words
The method of claim 8, wherein said at least one parameter is at least one of harmonic power and harmonic frequency.
Claim 11
Dependent Claim
17 words
The method of claim 8, wherein said at least one parameter is harmonic power and harmonic frequency.
Claim 12
Dependent Claim
18 words
The method of claim 7, comprising the step of generating and measuring said at least two harmonics simultaneously.
Claim 13
Dependent Claim
21 words
The method of claim 11, wherein said at least one parameter is at least one of harmonic power and harmonic frequency.
Claim 14
Dependent Claim
17 words
The method of claim 11, wherein said at least one parameter is harmonic power and harmonic frequency.
Claim 15
Dependent Claim
15 words
The method of claim 1, wherein said comparing step is implemented with a neural network.
Claim 16
Dependent Claim
32 words
The method of claim 1, comprising the step of calibrating signal detection such that prior to said exposing step, all harmonics selected for generation and measurement have an equal signal power level.
Claim 17
Independent Claim
128 words
An apparatus for sensing and analyzing data with surface acoustic wave (SAW) devices, comprising: a SAW device configured for operation with a SAW oscillator and coated for selective adsorption; an oscillator for generating at least one higher order harmonic of said SAW oscillator; a mixer for combining said at least one higher order harmonic and an output signal of said SAW device; a band-pass filter for said combined signal; a programmable amplifier for said band-pass filtered signal; a circuit for measuring at least one parameter of said amplified signal before and after said selective adsorption; an analyzer for comparing said measurements of said at least one parameter of said amplified signal before and after said selective adsorption and deriving from said comparing a result of said selective adsorption.
Claim 18
Independent Claim
128 words
An apparatus for sensing and analyzing data with surface acoustic wave (SAW) devices, comprising: a SAW device configured for operation with a SAW oscillator and coated for selective adsorption; an oscillator for generating at least one higher order harmonic of said SAW oscillator; a mixer for combining said at least one higher order harmonic and an output signal of said SAW device; a band-pass filter for said combined signal; a programmable amplifier for said band-pass filtered signal; a circuit for measuring at least one parameter of said amplified signal before and after said selective adsorption; an analyzer for comparing said measurements of said at least one parameter of said amplified signal before and after said selective adsorption and deriving from said comparing a result of said selective adsorption.
Claim 19
Dependent Claim
17 words
The apparatus of claim 16, wherein said oscillator and said programmable amplifier are controlled by said analyzer.
Claim 20
Dependent Claim
19 words
The apparatus of claim 17, wherein said measuring circuit measures at least one of harmonic power and harmonic frequency.
Claim 21
Dependent Claim
53 words
The apparatus of claim 18, wherein said oscillator generates at least two higher order odd harmonics of said fundamental frequency, each of which is measured before and after said selective adsorption, said analyzer deriving said result from a comparison of before and after measurements of said at least two higher order odd harmonics.
Claim 22
Dependent Claim
19 words
The apparatus of claim 19, wherein said at least two higher order odd harmonics are generated and measured sequentially.
Claim 23
Dependent Claim
12 words
The apparatus of claim 20, wherein said analyzer comprises a neural network.
Claim 24
Dependent Claim
19 words
The apparatus of claim 19, wherein said at least two higher order odd harmonics are generated and measured simultaneously.
Claim 25
Dependent Claim
12 words
The apparatus of claim 22, wherein said analyzer comprises a neural network.
Claim 26
Dependent Claim
19 words
The apparatus of claim 16, wherein said measuring circuit measures at least one of harmonic power and harmonic frequency.
Claim 27
Dependent Claim
30 words
The apparatus of claim 16, wherein signal detection is calibrated such that prior to said selective adsorption, all harmonics selected for generation and measurement have an equal signal power level.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-03-28 | 2003-09-27 | 2004-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-03-28 | 2007-09-27 | 2008-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-03-28 | 2011-09-27 | 2012-03-28 | $7700.00 | Window Closed / Lapsed |