Processing system for remote chemical identification
First Claim
1. A method of determining the temperature of a backdrop object against which a sample spectra is recorded, said method comprising the steps of:
- a. providing a predetermined relationship between a parabolic center frequency and a backdrop temperature, wherein said parabolic center frequency is that of a single beam spectrum of a reference backdrop at a known temperature;
b. providing a sample spectra recorded against a backdrop of an unknown temperature;
c. determining a best fit parabolic curve of said sample spectra;
d. determining a sample parabolic center frequency of said best fit parabolic curve;
e. comparing said sample parabolic center frequency to said predetermine relationship of center frequency and backdrop temperature;
f. estimating a temperature of said backdrop based upon said comparison.
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Abstract
A fourth embodiment of the present invention is a method of generating a temperature compensated absorbance spectrum. The method includes the steps of: a. providing a sample spectrum and an estimated temperature of a backdrop object; b. from a set of known temperature spectra related to a known background temperature, selecting at least two known temperature spectra representing a background temperature above and below the estimated temperature; c. comparing the sample spectrum to the known temperature spectra in order to determine a sample background spectrum; and d. calculating an absorbance spectrum from the sample spectrum and the background spectrum.
56 Citations
35 Claims
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1. A method of determining the temperature of a backdrop object against which a sample spectra is recorded, said method comprising the steps of:
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a. providing a predetermined relationship between a parabolic center frequency and a backdrop temperature, wherein said parabolic center frequency is that of a single beam spectrum of a reference backdrop at a known temperature;
b. providing a sample spectra recorded against a backdrop of an unknown temperature;
c. determining a best fit parabolic curve of said sample spectra;
d. determining a sample parabolic center frequency of said best fit parabolic curve;
e. comparing said sample parabolic center frequency to said predetermine relationship of center frequency and backdrop temperature;
f. estimating a temperature of said backdrop based upon said comparison. - View Dependent Claims (2, 3, 4)
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5. A method of generating a background spectrum for use in spectral analysis, said method comprising the steps of:
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a. providing a sample spectrum and an estimated temperature of a background object;
b. from a set of known temperature spectra related to a known background temperature, selecting at least two known temperature spectra representing a background temperature above and below said estimated temperature;
c. comparing said sample spectrum to said known temperature spectra in order to determine a sample background spectra. - View Dependent Claims (6)
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7. A method of generating a temperature compensated absorbance spectrum, said method comprising the steps of:
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a. providing a sample spectrum and an estimated temperature of a backdrop object;
b. from a set of known temperature spectra related to a known background temperature, selecting at least two known temperature spectra representing a background temperature above and below said estimated temperature;
c. comparing said sample spectrum to said known temperature spectra in order to determine a sample background spectrum;
d. calculating an absorbance spectrum from said sample spectrum and said background spectrum. - View Dependent Claims (8, 9)
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10. A method of identifying a chemical represented in an absorbance spectrum, said method comprising the steps of:
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a. providing a sample absorbance spectrum;
b. comparing said absorbance spectrum to spectra for CO2 and H2O and to at least one chemical reference spectrum in order to identify a chemical represented in said absorbance spectrum. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer system for identifying chemical compounds using observable characteristics, said system comprising:
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a. a chemical database associating predefined characteristics and properties with a plurality of chemical compounds;
b. a user interface accepting input of observable characteristics;
c. a processor operating on software directing said processor to identify chemical compounds in said database which correspond with said observable characteristics. - View Dependent Claims (22, 23)
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24. A computer system for identifying chemical compounds based upon a location where said compounds are observed, said system comprising:
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a. a chemical/location database associating at least one chemical compound with an assigned map location of said compound;
b. a location input for entering a system location into said system;
c. a processor operating on software directing said processor to identify chemical compounds in said database which correspond with said system location. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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33. A system for remote identification of chemical compounds, said system comprising:
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a. a passive infra-red spectrometer;
b. a location identifier;
c. a range finder;
d. a user interface;
e. a database including data representing chemical reference spectrums, data associating observable properties with certain chemical compounds, and data associating a location with certain chemical compounds;
e. a computer processor communicating with said spectrometer, said location identifier, said range finder, said user interface, and said database; and
f. software for comparing data from said spectrometer, said location identifier, and said range finder to said database in order to identify the potential presence and concentration of one or more chemical compounds. - View Dependent Claims (34, 35)
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Specification