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Title: Photoacoustic method for measuring concentration of chemical species

Abstract

The present invention is a transducer for photoacoustic detection having at least two piezoelectric elements wherein at least a first piezoelectric element has a first frequency and at least a second piezoelectric element has a second frequency. The improvement according to the present invention is that at least two piezoelectric elements are longitudinal elements for longitudinal waves; and the first frequency is different from said second frequency. In other words, the invention is a multi-frequency longitudinal transducer for photoacoustic detection.

Inventors:
 [1];  [2];  [2];  [2]
  1. West Richland, WA
  2. Richland, WA
Issue Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
873774
Patent Number(s):
6244101
Application Number:
09/322,910
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
photoacoustic; method; measuring; concentration; chemical; species; transducer; detection; piezoelectric; elements; element; frequency; improvement; according; longitudinal; waves; words; multi-frequency; piezoelectric element; longitudinal waves; chemical species; chemical specie; electric element; piezoelectric elements; longitudinal wave; measuring concentration; electric elements; /73/356/

Citation Formats

Autrey, S Thomas, Posakony, Gerald J, Amonette, James E, and Foster-Mills, Nancy S. Photoacoustic method for measuring concentration of chemical species. United States: N. p., 2001. Web.
Autrey, S Thomas, Posakony, Gerald J, Amonette, James E, & Foster-Mills, Nancy S. Photoacoustic method for measuring concentration of chemical species. United States.
Autrey, S Thomas, Posakony, Gerald J, Amonette, James E, and Foster-Mills, Nancy S. Mon . "Photoacoustic method for measuring concentration of chemical species". United States. https://www.osti.gov/servlets/purl/873774.
@article{osti_873774,
title = {Photoacoustic method for measuring concentration of chemical species},
author = {Autrey, S Thomas and Posakony, Gerald J and Amonette, James E and Foster-Mills, Nancy S},
abstractNote = {The present invention is a transducer for photoacoustic detection having at least two piezoelectric elements wherein at least a first piezoelectric element has a first frequency and at least a second piezoelectric element has a second frequency. The improvement according to the present invention is that at least two piezoelectric elements are longitudinal elements for longitudinal waves; and the first frequency is different from said second frequency. In other words, the invention is a multi-frequency longitudinal transducer for photoacoustic detection.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

Works referenced in this record: