Signal Readout of LC Pressure Sensor Operated in Multi-dimensional rotating Environment with Dual-inductance Resonator

In order to realize the parameter test in rotating environment, such as pressure, temperature, etc., a dual-inductor resonator (DIR) is designed to transfer the sensor signal from blade to the rotating axis for testing. The test mechanism and law of DIR are studied, and the signal transmission of LC sensor is realized via DIR. [Display omitted] •A method for transmitting LC sensor signals in a multi-dimensional rotating environment with dual-inductor resonators has been proposed.•The characteristics of dual-inductor resonators have been studied in this paper.•The phenomenon of frequency splitting is analyzed derived by formula and experimental verification.•An LC pressure sensor based on HTCC is fabricated to reflect pressure parameters in rotating environment.•Simplify signal readout by processing the experimental signal. In this paper, a method for transmitting LC sensor signals in a multi-dimensional rotating environment with dual-inductor resonators (DIR) has been proposed. The DIR is fabricated on printed circuit boards whose characteristics are studied via experiment and simulation. The LC pressure sensor, based on high-temperature co-fired ceramics and platinum conductor was fabricated, which showed a frequency variation of 1.185 MHz in a range of 0˜3 bar, and was measured in a rotating environment via DIR selected according to examination and simulations. The test results showed two signal peaks due to frequency splitting. The left signal peak drift with pressure was 1.05 MHz at a range of 0˜3 bar while the variation of the right signal was significantly lower at 0.175 MHz. Meanwhile, the left signal peak in atmosphere at 41.325 MHz was particularly close to the sensor frequency of 42.1175 MHz. Finally, the variation in the right signal was ignored, and the left signal peak was used to reflect the changes in the frequency of the sensor with pressure in multi-dimensional rotating environment.