Method and apparatus for real time gas analysis

Measuring and testing – Gas analysis – With compensation detail

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

73 233, 73 3101, 73 1G, 73 6141, 73 6144, 422 83, 422 94, G01N 2902, G01N 3100, A61B 508

Patent

active

060763922

ABSTRACT:
A method and apparatus for real time gas analysis involving determining individual concentrations of fluid constituents in a mixture of known constituents by measuring properties of the mixture and solving a set of equations, which relate the individual gas concentrations to the measured properties of the mixture, for the unknown individual gas concentrations. The individual concentrations of four gasses in a mixture are determined by: passing the mixture through a flowmeter, a capillary, an orifice, and a sonic oscillator; transducing temperature, pressure and acoustic frequency measurements taken from the sensors; determining the density, viscosity, and the specific heat of the mixture; forming three equations which respectively relate these three properties to individual gas concentrations; and solving the three equations and the constitutive equation which requires that the sum of the concentrations equal unity, for the four unknown individual gas concentrations. A single oscillator can serve as both a sensor (e.g., flowmeter, acoustic velocimeter) and an orifice. The fluidic sensors can be formed as a single chip disposable sensor module. By modifying only the processing software, the same sensors or a subset of the sensors can be used to verify or determine the identity of an unknown gas which is supplied by itself in a pure form or in a mixture of other gasses whose identities are known. By measuring N-1 properties of the gas mixture as a whole, the capabilities of an existing sensor system for measuring M gas concentrations can be extended to measure N additional gas concentrations, provided the identities of the gasses in the mixture are known. Similarly, by modifying only the processing software the same sensor can be used to analyze any sets of gas mixtures.

REFERENCES:
patent: 3698238 (1972-10-01), Wall et al.
patent: 3791200 (1974-02-01), Hayre
patent: 3927670 (1975-12-01), Turney et al.
patent: 4150561 (1979-04-01), Zupanick
patent: 4196626 (1980-04-01), Manion et al.
patent: 4558220 (1985-12-01), Evans
patent: 4570675 (1986-02-01), Fenwick et al.
patent: 4634053 (1987-01-01), Herzfeld et al.
patent: 4665911 (1987-05-01), Williams et al.
patent: 4670405 (1987-06-01), Stetter et al.
patent: 4779451 (1988-10-01), Ezawa et al.
patent: 4847783 (1989-07-01), Grace et al.
patent: 4907441 (1990-03-01), Shurmer
patent: 5076094 (1991-12-01), Frye et al.
patent: 5107920 (1992-04-01), Scotti et al.
patent: 5221871 (1993-06-01), Fuchs et al.
patent: 5238056 (1993-08-01), Scotti et al.
patent: 5325704 (1994-07-01), Mariani et al.
patent: 5465608 (1995-11-01), Lockshin et al.
patent: 5469369 (1995-11-01), Rose-Pehrsson, et al.
patent: 5495744 (1996-03-01), Ueda
Calkins et al. A Flueric Respiratory and Anesthetic Gas Analyzer; Annals of Biomedical Engineering, vol. 10, pp. 83-96, 1982.
Togawa et al. Biomedical Transducers and Instruments; CRC Press LLC, 1997.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for real time gas analysis does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for real time gas analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for real time gas analysis will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1842127

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.