发明授权
- 专利标题： METHOD AND APPARATUS FOR THE TRANSMISSION OF AN ACOUSTIC SIGNAL IN A PHOTOACOUSTIC CELL
- 专利标题（中）： 方法和设备的声音信号在光声信元传输。
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申请号： EP91906363.6申请日： 1991-03-04
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公开(公告)号： EP0518993B1公开(公告)日： 1994-06-08
- 发明人: HAMMERICH, Mads , HENNINGSEN, Jes, O. , OLAFSSON, Ari
- 申请人： FLS Airloq A/S
- 申请人地址： Vigerslev Alle 77 DK-2500 Valby DK
- 专利权人： FLS Airloq A/S
- 当前专利权人： FLS Airloq A/S
- 当前专利权人地址： Vigerslev Alle 77 DK-2500 Valby DK
- 代理机构： Lomholt, Lars A.
- 优先权： DK562/90 19900305
- 国际公布： WO9114176 19910919
- 主分类号： G01N29/02
- IPC分类号： G01N29/02 ; G01N29/20
摘要：
In a method for the transmission of an acoustic signal to a microphone in a photoacoustic cell being part of an apparatus for photoacoustic analysis of substances or gases and in which the zone (40) containing a medium to be analysed represents a damaging environment to the microphone (10), the latter is connected to an excitation zone (30) through a waveguide (20) into which a protecting gas which is chemically neutral to the medium sample has been introduced between the microphone (10) and the medium to prevent the medium from reaching the microphone, the protecting gas being furthermore of a type which allows the waveguide (20) to transmit the acoustic signal generated in the medium through the protecting gas to the microphone without any significant weakening of the signal.
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