THOMAS BROWN
Hearing Instrument Specialists at Mcgavock Pike, Nashville, TN
License number
Tennessee 586
Category
Speech Language Pathology
Type
Hearing Instrument Specialist
Address
Address
2909 Mcgavock Pike, Nashville, TN 37214
Phone
(615) 883-8619
Professional information
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Method And Apparatus For Determining The Velocity Of A Gas Flow
Method And Apparatus For Determining The Velocity Of A Gas Flow
US Patent:
5708495, Jan 13, 1998
Filed:
Sep 1, 1995
Appl. No.:
8/522943
Inventors:
Robert W. Pitz - Nashville TN
Peter A. DeBarber - Laguna Beach CA
Thomas M. Brown - Nashville TN
Peter A. DeBarber - Laguna Beach CA
Thomas M. Brown - Nashville TN
Assignee:
Vanderbilt University - Nashville TN
International Classification:
G01P 336, G01P 1500, G01P 518
US Classification:
356 28
Abstract:
A method and apparatus for measuring the velocity of a gas flow that does not require the seeding of the flow is disclosed. The method and apparatus produce a population of stable molecules within the flow. This population of stable molecules is produced within the flow at a first time point. A population of excited molecules is produced from the stable molecules at a second time point by exciting the stable molecules with a laser beam. This laser beam also induces fluorescence in the population of excited chemical species at the second time point. Typically, the interval between the first and second time points is known and the velocity of the flow is calculated by dividing the distance travelled by the stable molecules in the flow by the known time interval. The preferred example of the stable molecule is ozone. Oxygen molecules are fluoresced by a 193 nm laser beam at a first time point, producing oxygen atoms.