초록 ▼

This invention relates to a parametric source Doppler acoustic wind profiler for measuring atmospheric wind conditions. It includes a parametric acoustic source excited by a transmitter generating a pair of primary frequencies and radiates an intermodulation difference frequency. Echoes of the diffe

This invention relates to a parametric source Doppler acoustic wind profiler for measuring atmospheric wind conditions. It includes a parametric acoustic source excited by a transmitter generating a pair of primary frequencies and radiates an intermodulation difference frequency. Echoes of the difference frequency are produced by wind induced scatter at the difference frequency which is significantly lower than the transmitted primary frequencies and detected by a single microphone or an array of microphones.

대표청구항 ▼

A wind measurement system, comprising: means for propagating a code modulated acoustic beam through the atmosphere; means for receiving back scattered acoustic signals created by the interaction of the propagated acoustic energy and air currents; and means for the digital coherent demodulation of sa

A wind measurement system, comprising: means for propagating a code modulated acoustic beam through the atmosphere; means for receiving back scattered acoustic signals created by the interaction of the propagated acoustic energy and air currents; and means for the digital coherent demodulation of said received acoustic signals.