| 摘要 |
<p>The invention concerns a method for measuring the oscillation frequency of a fluid jet in a fluidic oscillator using a heat sensor. The resistance of the heat sensor varies according to the jet oscillation frequency fo. The method consists in powering the heat sensor with an alternating voltage of frequency f, then in determining the frequency components of the signal at the output of the heat sensor at about frequency 3xf, so as to determine the jet oscillation frequency fo. The determination of the frequency components of the signal at the heat sensor output is carried out by measuring at the terminals of the heat sensor the measurement signal, then in synchronously demodulating the measurement signal at frequency 3xf, and finally in determining the frequency of the demodulated measurement signal, which corresponds to the jet oscillation frequency fo.</p> |
