Design and Implementation of Sensor for Velocity of Detonation Measurement

Abstract

Velocity of Detonation (VOD) is the most important property to consider when rating an explosive. It is an established fact that VOD gives a good indication of the strength and hence the performance of the explosive. Detonation Sensor is the most critical part of the VOD measurement system. This paper presents and discusses various practical and field implemental techniques for sensing detonation wave with detailed study of electrical ionization principle using resistance sensor for VOD measurement. In this technique effort is made to overcome the limitation of continuous wire sensor and discrete points sensor under various practical conditions. Step change in resistance is utilised to increase the system reliability, improve noise immunity as well as to reduce the system complexity.