发明名称 |
Photoacoustic method for measuring concentration of chemical species |
摘要 |
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.
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申请公布号 |
US6244101(B1) |
申请公布日期 |
2001.06.12 |
申请号 |
US19990322910 |
申请日期 |
1999.06.01 |
申请人 |
BATTELLE MEMORIAL INSTITUTE |
发明人 |
AUTREY S. THOMAS;POSAKONY GERALD J.;AMONETTE JAMES E.;FOSTER-MILLS NANCY S. |
分类号 |
G01N21/17;(IPC1-7):G01N21/17 |
主分类号 |
G01N21/17 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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