Modeling of Optical Communication Channel of Telemetric Measuring System

Abstract

In this paper we propose models of optical communication channel of telemetric measuring system intended for piston thermometry of the running engine of internal combustion. The communication channel is realized between primary and intermediate transducers installed on the piston and the static package for receiving and processing of measuring information of system located outside the engine. The channel turns on the radiator, the photodetector and the scheme of restitution of amplitude of pulse informational signals. Models of a communication channel are presented in the environment of Micro-Cap and realized on ideal and real fissile elements (an operational amplifier and the comparator of tension). Researches of transition processes on models in the mode of the analysis Transient of the Micro-Cap program at information transfer in duration of optical impulses showed that in a communication channel modulation of amplitude of optical impulses up to 30 dB at a transfer error is allowed at no more than 1% error in a frequency range of engine speed from 10 to 100 Hz and duration of impulses from 10 microseconds to 1 ms. The modelled channel can be used in actual telemetering systems of thermometry and other physical properties of internal combustion engines in the course of their pilot studies and operational development.