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A method for determining the doppler signal in a anemometer laser doppler and anemometer laser doppler for the implementation of this.
A method for determining the doppler signal in a anemometer laser doppler and anemometer laser doppler for the implementation of this.
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机译：一种用于确定风速仪激光多普勒中的多普勒信号的方法和用于实现此目的的风速仪激光多普勒。
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摘要
It modulates the laser light of extent to a high frequency carrier, which is substantially greater than the doppler frequency. It brings the laser light is thus modulated to a carrier frequency in a volume of measurement (12) where it is modulated in amplitude by the doppler frequency, so that it is set up a spectrum of a signal having a plurality of lateral strips. & br / it amplifies the lateral strip of the positive and / or negative with respect to the carrier frequency in an amplifier to resonance (13) corresponding to these lateral strips are then treated and the lateral strip of the positive and / or negative in an evaluation circuit for extracting the doppler information. This process enables the use of photodiodes are easy to operate, and also the implementation of the low noise amplifiers of relatively simple design.
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