Abstract
This paper presents a novel readout system for wireless passive pressure sensors based on the inductively coupled inductor and cavity (LC) resonant circuits. The proposed system consists of a reader antenna inductively coupled to the sensor circuit, a readout circuit, and a personal computer (PC) post processing unit. The readout circuit generates a voltage signal representing the sensor’s capacitance. The frequency of the reader antenna driving signal is a constant, which is equal to the sensor’s resonant frequency at zero pressure. Based on mechanical and electrical modeling, the pressure sensor design based on the high temperature co-fired ceramic (HTCC) technology is conducted and discussed. The functionality and accuracy of the readout system are tested with a voltage-capacitance measurement system and demonstrated in a realistic pressure measurement environment, so that the overall performance and the feasibility of the readout system are proved.
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Zhang, H., Hong, Y., Ge, B. et al. A novel readout system for wireless passive pressure sensors. Photonic Sens 4, 70–76 (2014). https://doi.org/10.1007/s13320-013-0155-y
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DOI: https://doi.org/10.1007/s13320-013-0155-y