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41. 发明授权

US06606915B2 Method for measuring oscillation frequency of a fluid jet in a fluidic oscillator 失效
标题翻译：用于测量流体振荡器中的流体射流的振荡频率的方法
公开(公告)号：US06606915B2
公开(公告)日：2003-08-19
申请号：US10111990
申请日：2002-08-20
申请人： Stephane Vannuffelen
发明人： Stephane Vannuffelen
IPC分类号： G01F132
CPC分类号： G01F1/3227 , F15C1/22 , G01F1/3272
摘要： The oscillation frequency of a fluid jet in a fluidic oscillator is measured using a temperature sensor. The resistance of the temperature sensor varies as a function of the oscillation of frequency f0 of the jet. The method consists in feeding the temperature sensor with an AC voltage of frequency f, and then in determining the frequency components around the frequency 3×f in the output signal from the temperature sensor in order to determine the oscillation frequency f0 of the jet. The frequency components in the signal output by the temperature sensor are determined by measuring the measurement signal across the terminals of the temperature sensor, then by synchronously demodulating the measurement signal at the frequency 3×f, and finally by determining the frequency of the demodulated measurement signal, which frequency corresponds to the oscillation frequency f0 of the jet.
摘要翻译：使用温度传感器测量流体振荡器中的流体射流的振荡频率。温度传感器的电阻随射流频率f0的振荡的变化而变化。该方法包括将温度传感器馈送到频率f的交流电压，然后确定来自温度传感器的输出信号中频率3xf周围的频率分量，以确定射流的振荡频率f0。由温度传感器输出的信号中的频率分量通过测量温度传感器端子上的测量信号来确定，然后通过以3×f频率同步解调测量信号，最后通过确定解调测量信号的频率，该频率对应于射流的振荡频率f0。

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