Photoacoustic method for measuring concentration of chemical species

Patent · Mon Jan 01 00:00:00 EST 2001

OSTI ID:873774

Autrey, S Thomas ^[1]; Posakony, Gerald J ^[2]; Amonette, James E ^[2]; Foster-Mills, Nancy S ^[2]

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1. West Richland, WA
2. Richland, WA

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.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC06-76RL01830
• Assignee: Battelle Memorial Institute (Richland, WA)
• Patent Number(s): US 6244101
• Application Number: 09/322,910
• OSTI ID: 873774
• Country of Publication: United States
• Language: English

Related Subjects

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
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