Self-contained multivariate optical computing and analysis system

• US 8,379,199 B2
• Filed: 11/01/2007
• Issued: 02/19/2013
• Est. Priority Date: 11/02/2006
• Status: Active Grant

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Freese, Robert P., Teague, Terrell K., Perkins, David L., Soltmann, William J.
• Primary Examiner(s): LAUCHMAN, LAYLA G
• Application Number:
  US12/513,265
• Publication Number:
  US 20100182600A1
• Time in Patent Office: 1,937 Days
• Field of Search: 356/300, 356/303, 356/417, 356/37, 356/318, 250/341.8
• US Class Current: 356/303
• CPC Class Codes: G01J 3/02 Details
• CPC Class Codes: G01J 3/0205 Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
• CPC Class Codes: G01J 3/021 using plane or convex mirrors, parallel phase plates, or particular reflectors
• CPC Class Codes: G01J 3/0264 Electrical interface; User interface
• CPC Class Codes: G01J 3/4338 Frequency modulated spectrometry
• CPC Class Codes: G01N 2021/1793 Remote sensing
• CPC Class Codes: G01N 21/255 Details, e.g. use of specially adapted sources, lighting or optical systems
• CPC Class Codes: G01N 21/31 Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry G01N21/72 takes precedence
• CPC Class Codes: G01N 21/35 using infrared light G01N21/39 takes precedence
• CPC Class Codes: G01N 21/3563 for analysing solids; Preparation of samples therefor
• CPC Class Codes: G01N 21/4738 Diffuse reflection precedence is given to G01N21/55 - G01N21/57 if specular component is taken into consideration, e.g. also for testing fluids, fibrous materials
• CPC Class Codes: G01N 2201/0691 Modulated (not pulsed supply)
• CPC Class Codes: G01N 2201/0693 Battery powered circuitry
• CPC Class Codes: G01N 2201/1293 resolving multicomponent spectra

Abstract

An optical analysis system for measuring compositions of a sample includes a light source radiating a first light. A modulator disposed in a ray path of the light modulates the light to a desired frequency. A spectral element filters the light for a spectral range of interest of the sample. An optical filter receives a first light beam split from the light reflecting from the sample and optically filters data carried by the first light beam into at least one orthogonal component of the first light beam. A first detector measures a property of the orthogonal component. A second detector receives a second light beam split from the light reflecting from the sample for comparison of the property of the orthogonal component to the second light beam. An accelerometer senses when to acquire data from the sample.

Claims

1. An optical analysis system for measuring compositions, comprising:

a light source being configured to radiate a first light;

a modulator disposed in a ray path of the light, the modulator being configured to modulate the light to a desired frequency;

a spectral element disposed proximate the modulator, the spectral element being configured to filter the light for a spectral range of interest of a sample;

an optical filter mechanism disposed to receive a first light beam split from the light reflecting from the sample, the optical filter mechanism being configured to optically filter data carried by the first light beam into at least one orthogonal component of the first light beam;

a first detector mechanism in communication with the optical filter mechanism to measure a property of the orthogonal component to measure the data carried by the first light beam;

a second detector mechanism being configured to receive a second light beam split from the light reflecting from the sample for comparison of the property of the orthogonal component to the second light beam;

an accelerometer being configured to sense when to acquire the data from the sample;

a computer disposed in the system in communication with the first and second detector mechanisms for processing the data; and

a battery system in electrical communication to provide stand-alone capability.

2. The optical analysis system as in claim 1, wherein the optical analysis system is operable in a transmission mode.

3. The optical analysis system as in claim 1, wherein the optical analysis system is operable in a reflectance mode.

4. The optical analysis system as in claim 1, wherein the modulator includes a plurality of windows, at least two of the windows having different materials to provide different spectral characteristics.

5. The optical analysis system as in claim 1, wherein the modulator includes a plurality of windows, at least window containing a multivariate optical element.

6. The optical analysis system as in claim 1, wherein the spectral element is a multivariate optical element selected for the sample based on components of the system.

7. The optical analysis system as in claim 1, wherein the computer includes a data acquisition and conversion card.

8. The optical analysis system as in claim 1, further comprising an interrogation window, the accelerometer being configured to sense when the sample is proximate the interrogation window, the accelerometer being in communication with the computer such that only when the sample is proximate the interrogation window is the data acquired from the sample.

9. The optical analysis system as in claim 1, further comprising an interrogation window, the accelerometer sensing when the system is in an orientation placing the sample proximate the interrogation window to acquire data from the sample.

10. The optical analysis system as in claim 1, further comprising an interrogation window, the accelerometer sensing when the sample is in the ray path of the light and being further configured to control data acquisition based thereon.

11. The optical analysis system as in claim 1, further comprising a beamsplitter being configured to split the light into the first beam and the second beam.

12. The optical analysis system as in claim 1, further comprising a cavity in communication with the spectral element, the cavity being configured to direct the light in a direction of the sample.

13. The optical analysis system as in claim 1, further comprising a conical mirror being configured to convert the light reflecting from the sample into the first light beam and the second light beam.

14. An optical analysis system utilizing a light source to radiate a light along a ray path, the optical analysis system comprising:

a modulator disposed in a light ray path, the modulator being configured to modulate a light along the light ray path to a desired frequency;

a spectral element disposed proximate the modulator, the spectral element being configured to filter the light for a spectral range of interest of a sample;

a conical mirror being configured to convert the light reflecting from the sample into a directed light;

a beamsplitter being configured to split the directed light into a first beam and a second beam;

an optical filter mechanism disposed to receive the first beam, the optical filter mechanism being configured to optically filter data carried by the first beam into at least one orthogonal component of the first beam;

a first detector mechanism in communication with the optical filter mechanism to measure a property of the orthogonal component to measure the data;

a second detector mechanism being configured to receive the second beam for comparison of the property of the orthogonal component to the second beam;

an accelerometer being configured to control the data acquisition such that only detector signals during the period of time when a material sample is in proximity to the interrogation window are used for calculation;

a computer having a data acquisition and conversion card, the computer disposed in the system in communication with the first and second detector mechanisms for signal processing; and

a wireless system in communication with the computer to provide stand-alone operation capability.

15. The optical analysis system as in claim 14, wherein the optical analysis system is operable in one of a transmission mode and a reflectance mode.

16. The optical analysis system as in claim 14, wherein the wireless system is a battery and charging system disposed in the optical analysis system.

17. The optical analysis system as in claim 14, further comprising a cavity in communication with the spectral element, the cavity being configured to direct the light in a direction of the sample.

18. A method of determining information carried by light, comprising:

filtering a light through a spectral element for a spectral range of interest of a sample;

focusing the filtered light through an interrogation window proximate the sample when the sample is in proximity to the interrogation window;

reflecting the light from the sample in a direction of a beamsplitter, the light being reflected from the sample carrying data from the sample;

splitting the data-carrying light with the beamsplitter into a first light and a second light;

optically filtering the data of the first light with a multivariate optical element into an orthogonal component;

directing the first light filtered by the multivariate optical element onto a first photodetector;

directing the second light onto a second photodetector;

comparing the orthogonal component to information present in the second light to determine a property of the sample; and

using an accelerometer to sense a system orientation placing the sample proximate the interrogation window to acquire data from the sample.

19. The method as in claim 18, wherein the light has a focal point in the sample.

20. The method as in claim 18, wherein wirelessly transmitting is accomplished utilizing a stand-alone computer disposed in the optical analysis system.

21. The method as in claim 18, further comprising loading software in the stand-alone computer for a desired analyte analysis.

23. The method of claim 18, wherein the material sample is a hydrocarbon, the method further comprising analyzing the components of the hydrocarbon.

22. A method of determining information carried by light, comprising:

filtering a light through a spectral element for a spectral range of interest of a sample;

focusing the filtered light through an interrogation window proximate the sample when the sample is in proximity to the interrogation window;

reflecting the light from the sample in a direction of a beamsplitter, the light being reflected from the sample carrying data from the sample;

splitting the data-carrying light with the beamsplitter into a first light and a second light;

optically filtering the data of the first light with a multivariate optical element into an orthogonal component;

directing the first light filtered by the multivariate optical element onto a first photodetector;

directing the second light onto a second photodetector;

comparing the orthogonal component to information present in the second light to determine a property of the sample; and

wirelessly transmitting the property of the sample,

wherein wirelessly transmitting is accomplished using a battery and charging system disposed in the optical analysis system.

24. An optical analysis system for measuring compositions, comprising:

a light source being configured to radiate a first light;

a modulator disposed in a ray path of the light, the modulator being configured to modulate the light to a desired frequency;

a spectral element disposed proximate the modulator, the spectral element being configured to filter the light for a spectral range of interest of a sample;

an optical filter mechanism disposed to receive a first light beam split from the light reflecting from the sample, the optical filter mechanism being configured to optically filter data carried by the first light beam into at least one orthogonal component of the first light beam;

a first detector mechanism in communication with the optical filter mechanism to measure a property of the orthogonal component;

a second detector mechanism being configured to receive a second light beam split from the light reflecting from the sample for comparison of the property of the orthogonal component to the second light beam; and

an accelerometer being configured to sense when to acquire the data from the sample.

25. The optical analysis system as in claim 24, wherein the spectral element is a multivariate optical element.

26. The optical analysis system as in claim 24, further comprising a computer disposed in the system in communication with the first and second detector mechanisms for processing the data;

and an interrogation window, the accelerometer being configured to sense when the sample is proximate the interrogation window, the accelerometer being in communication with the computer such that only when the sample is proximate the interrogation window is the data acquired from the sample.

27. The optical analysis system as in claim 24, further comprising an interrogation window, the accelerometer sensing when the system is in an orientation placing the sample proximate the interrogation window to acquire data from the sample.

28. The optical analysis system as in claim 24, further comprising an interrogation window, the accelerometer sensing when the sample is in the ray path of the light and being further configured to control data acquisition based thereon.