Design of Digital Barometric Altimeter

Abstract

Altimeter is altitude measurement system that is used to determine the altitude of a flying vehicle and provide the aircraft pilots, navigators and other aerospace users the altitude information either in analog or digital readout. This information is a very important parameter for all aerospace users during flight in order to achieve safe and efficient flight operation. using an accurate and precise system for altitude measurement is essential, Therefore, design of a new digital altimeter is significant and much needed for this reason. The main objective of the thesis is to design and implement of low cost digital barometric altimeter. The design stages of this model have been carried out by enhancing conventional barometric altimeter system through diagnosing of measurement errors, expresses of these errors in mathematical derivations, compensate these deviations using a suitable algorithm, reduce mechanical parts and then simulate the conceptual model using proteus program. The simulated model has been implemented as prototype and then tested to show the sea level altitude in digital read out, good results have been achieved and compared to standard atmosphere model tables for more demonstration. In addition to that, new concept for altitude alert system has been carefully considered to alert the pilot when reaching a maximum cruising altitude.