Conductive probe liquid holdup gauge
A conductivity probe and liquid holdup technology, applied in the direction of material impedance, etc., can solve problems such as difficult to balance stable output and fast response speed, poor anti-interference ability of signal source and line, poor anti-interference signal processing circuit, etc. Achieve good stability and dynamic response speed, simplify the signal source and signal processing circuit, and suppress the effect of capacitive reactance components
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[0010] The present invention will be described in detail below with reference to the drawings and embodiments.
[0011] Such as figure 1 As shown, the present invention includes a signal generator 1, a probe 2 and a signal processor 3. The signal generator 1 contains a signal generator 4 and an audio power amplifier 5; the signal processor 3 contains There is a high-speed operational amplifier 6 and an RMS-DC (AC voltage to DC effective value) converter 7.
[0012] The signal generating integrated circuit 4 in the signal generator 1 outputs a high-frequency sine wave signal. After the power of the sine wave signal is amplified by the audio power amplifier 5, it is used as the output signal source of the signal generator 1 to provide high frequency for the probe 2. signal. In this way, the sine wave signal amplified by the audio power amplifier 5 can not only increase the load capacity of the signal generator 1, but also increase the output frequency of the signal generator 1. Th...
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