Synthesis of quartz measuring transducers with low Q — Factor sensor element

Abstract

Measuring transducers of physical magnitudes with a frequency output are presented in the publication. They are designed based on the piezo resonant oscillating system (POS), which consists of high-quality element-quartz resonator (QR), the element of connection (RC-circuit) and low-quality sensor element. The developed mathematical model of POS with low Q — factor sensor element, modeling and the analysis of POS in the MATLAB system are carried out. The new class of frequency-compensated piezo resonant oscillating system (FCPOS) based on the automated frequency control system (AFCS) is proposed. On the example of measuring transducer of humidity of the discrete substances, structural features and optimization of characteristics of primary measuring transducers (PMT) “physical parameter-frequency” based on the FCPOS are studied.