Thick-Film Tilt Sensors: Feasibility Study Example Using Free Convective Motion of An Heating Air Mass

摘要

In this application a feasibility study example of thick-film tilt sensor has been presented based on heatrntransfer by natural convection. The device measures internal changes in heat transfer due to the inclination.rnThe device is functionally equivalent to traditional proof-mass accelerometer. The proof mass in the newrnthick-film sensor is a gas. The gaseous proof-mass provides great advantages over the use of the traditionalrnsolid proof mass. A conditioning electronics amplifies the signal variation induced by the inclinationrncompensating the deviation due to the initial asymmetrical values of the bridge arms and their slowrnvariations. Preliminary tests on the first prototypes show an accuracy of about 2% full scale output,rnrepeatability of about 0.2° and resolution better than 0.1 ° over a ± 20° range.