Радіовимірювальні сенсори концентрації газових сумішей

Abstract

This paper considers theoretical methods of analysis of radio sensors concentrations for flow. In the master's qualification work in scientific terms the mathematical models of radio sensors concentrations of gas mixtures with frequency output based on nonlinear equivalent circuits that allowed us to obtain current-voltage characteristics conversion function and sensitivity equation developed devices. Developed Testers concentration of gas sensors based on two bipolar transistor structures. Experimental studies have shown that the greatest sensitivity microelectronic transducer of gas concentration on the basis of two bipolar transistors in the range of 100 to 500 ppm and is about 100 Hz / ppm, and in the range from 500 to 5000 ppm ranges from 40 Hz / ppm to 26.5 Hz / ppm. The fourth chapter describes recommendations for health and safety at work with this unit and calculation 'exposure of the cornea of the eye by direct laser irradiation. The fifth chapter estimates the calculation of production costs and effectiveness of the device investment.