GAS VISCOSITY SENSOR ON THE MICROCONTROLLER

Abstract

As part of this study, a gas viscosity sensor was developed based on sensor technology and a microcontroller. The use of a microcantilever as the most simplified MEMS-based device is proposed. It is emphasized that molecules adsorbed on the surface of the microcantilever can cause changes in the vibrational frequency and deflection of the microcantilever, and the resulting changes in the vibrational frequency can be used to measure various parameters such as viscosity, density, and flow rate. This effect is the basis of development. It is emphasized that the researched digital gas viscosity sensor is designed for a physical experiment based on sensor technology and a microcontroller. The design of the digital gas viscosity sensor consists of an oscillating microcantilever, the peak frequency of the resonant response of which is the main dynamic characteristic, which is very sensitive to the density and viscosity of the environment. A piezoelectric transducer is integrated at the top of the cantilever to enable actuation. It is emphasized that the piezoelectric effect can measure mass changes at the microgram to nanogram per unit area level. A block diagram of the system software is presented. It is noted that the special printed circuit board contains a MEMS chip, pressure and temperature sensors, the accuracy of the system is determined based on the results of measurements and knowledge of the dimensions of the active field of the crystal.