首页> 外国专利> method for determination of dopplersignals in laser doppler anemometrie and laser doppler anemometer for the implementation of this procedure.

method for determination of dopplersignals in laser doppler anemometrie and laser doppler anemometer for the implementation of this procedure.

机译:用于确定激光多普勒测血仪中的多普勒信号的方法和激光多普勒风速仪中的该方法的实施。

摘要

A method is described of determining a Doppler signal in a laser-Doppler anemometer, as is a carrier frequency laser-Doppler anemometer for carrying out this method. According to the invention, the measuring laser light is modulated with the aid of a high-frequency carrier frequency which is substantially higher than the Doppler frequency, and the laser light thus modulated by carrier frequency is then introduced into a laser-Doppler anemometer measuring volume. It is amplitude-modulated in this measuring volume with the aid of a Doppler frequency, thus resulting in a signal spectrum having a plurality of side bands. The side band that is positive and/or negative with respect to the carrier frequency is amplified in a resonance amplifier accommodating these side bands, and the positive and/or negative side band is then further processed in an evaluation circuit in order to obtain the Doppler information. This method enables the use of photodiodes that are easy to operate, and also the use of low-noise amplifiers of comparatively simple construction. IMAGE
机译:描述了一种确定激光多普勒风速仪中的多普勒信号的方法,以及用于执行该方法的载频激光多普勒风速仪。根据本发明,借助于实质上高于多普勒频率的高频载波频率来调制测量激光,然后将通过载波频率如此调制的激光引入激光多普勒风速计测量空间中。 。借助于多普勒频率在该测量体积中对它进行幅度调制,从而产生具有多个边带的信号频谱。相对于载波频率为正和/或负的边带在容纳这些边带的谐振放大器中放大,然后在评估电路中进一步处理正和/或负边带,以获得多普勒信息。该方法使得能够使用易于操作的光电二极管,并且能够使用结构相对简单的低噪声放大器。 <图像>

著录项

相似文献

  • 专利
  • 外文文献
  • 中文文献
获取专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号