Resonant LCR Circuit for Fluid Sensing

The patent applies resonant vibration principles by exciting the LCR circuit at its natural resonant frequency. This resonance amplifies the sensor response to fluid property changes, dramatically improving sensitivity compared to standard impedance spectroscopy. The resonant oscillation allows rapid measurement at a single frequency point rather than sweeping through a wide frequency range, reducing acquisition time from minutes to seconds while maintaining high measurement precision through the amplified resonant signal.

The patent performs preliminary action by pre-tuning the LCR circuit to its resonant frequency before measurement. This pre-positioning at the optimal frequency point eliminates the need for time-consuming frequency sweeps. The resonant frequency is determined by the circuit components (L, C, R) and provides the maximum sensitivity point for dielectric property measurement, allowing comprehensive information to be obtained at a single frequency rather than requiring broad frequency range scanning.

The patent applies self-service by designing the LCR circuit to be self-resonant, where the inductor, capacitor, and resistor components naturally establish the resonant frequency based on their values. The circuit generates and sustains its own oscillation without requiring external complex signal generation or frequency sweeping equipment. This self-sustaining resonant behavior simplifies the overall system architecture while achieving high measurement speed and sensitivity, as the circuit automatically operates at its optimal measurement point.