US2005202571A1PendingUtilityA1

Method and apparatus for monitoring substances

44
Assignee: MATHIS INSTR LTDPriority: Jun 27, 2001Filed: Mar 29, 2005Published: Sep 15, 2005
Est. expiryJun 27, 2021(expired)· nominal 20-yr term from priority
Inventors:Nancy Mathis
G01N 25/18Y10T436/25G01N 9/36B01F 35/20
44
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Claims

Abstract

The methodology disclosed permits the testing of fluids, solids, powders and pastes through the measurements of effusivity. Effusivity is a measurement that combines thermal conductivity, density, and heat capacity. Blend uniformity, homogeneity, miscibility, concentration, voiding\delamination, and moisture content are exemplary of the applications to which the present methodology is applicable. The method of monitoring homogeneity, miscibility, concentration, voiding\delamination, and moisture content in a material comprises the steps of measuring effusivity of a first portion of the material, measuring effusivity of a second portion of the_material, comparing each measurement. The caparison may be between the measurements themselves or to a predetermined range of values and indicating which portion has an out of range measurement. The method of monitoring blend uniformity in a mixture containing a plurality of components to be mixed, comprises the steps of providing a first composition and a second composition, each having a different effusivity, mixing said first composition and said second composition, measuring effusivity in said mixture during mixing, determining the relative standard between measurements, and correlating the relative deviation for a determination of blend uniformity.

Claims

exact text as granted — not AI-modified
1 . A method of monitoring blend uniformity in a mixture containing a plurality of components to be mixed, comprising the steps of: 
 providing a first composition and a second composition, each having a different effusivity;    mixing said first composition and said second composition;    measuring effusivity in said mixture during mixing;    determining the relative deviation between measurements; and    correlating the relative deviation for a determination of blend uniformity.    
     
     
         2 . The method as set forth in  claim 1 , wherein said method is an on-line method.  
     
     
         3 . The method as set forth in  claim 2 , wherein said measurements are obtained in real-time.  
     
     
         4 . The method as set forth in  claim 1 , wherein said step of measuring is done at a plurality of locations in said mixture.  
     
     
         5 . The method as set forth in  claim 4 , wherein said step of measuring is done at a plurality of locations is simultaneously.  
     
     
         6 . A method of monitoring homogeneity in a material comprising the steps of: 
 measuring effusivity of a first portion of the material;    measuring effusivity of a second portion of the material; and    statistically comparing each measurement.    
     
     
         7 . A method as claimed in  claim 6  wherein the step of statistically comparing, compares a measurement for the first portion to a measurement for the second portion taken at a given time.  
     
     
         8 . A method as claimed in  claim 6  wherein the step of statistically comparing compares each measurement to a predetermined range of values.  
     
     
         9 . A method as claimed in  claim 8  further comprising the step of indicating which portion has an out of range measurement.  
     
     
         10 . A method as claimed in  claim 6  wherein the material is a planar material.  
     
     
         11 . A method as claimed in  claim 10  wherein the planar material is a laminate.  
     
     
         12 . A method as claimed in  claim 10  wherein the planar material is composite.  
     
     
         13 . A method as claimed in  claim 6  wherein the material is fluid.  
     
     
         14 . A method as claimed in  claim 6  further comprising the step of comparing each measurement and if different then comparing each measurement to a predetermined range of values.  
     
     
         15 . A method as claimed in  claim 6  wherein the measuring of first and second portions occurs substantially simultaneously.  
     
     
         16 . A method as claimed in  claim 6  wherein the measuring of first and second portions occurs substantially sequentially.  
     
     
         17 . A method as claimed in  claim 6  wherein the measuring of first and second portions is performed with different probes.  
     
     
         18 . A method as claimed in  claim 6  wherein the measuring of first and second portions is performed with the same probes displaced from a first position to a second position.  
     
     
         19 . A method as claimed in  claim 6  wherein the step of measuring uses a plurality of probes.

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