Experimental Assessment of Noncontact Type Laser-Based Force Measurement Technique for Impulsive Loading

Abstract

Force measurement is an essential element in the design of mechanical or nonmechanical systems. The choice of a particular technique, among the numerous measurement techniques available, depends on various parameters within which the nature of force is an important one. The measurement of impulse force is considered in this study using two techniques. In view of this, an experimental setup has been developed to understand the applicability and assessment of a laser-based extrusive technique, along with the established intrusive accelerometer-based technique for impulsive force measurement. The accelerometer-based measurements can be used to precisely predict the magnitude and temporal nature of the force. However, the velocitybased impulse prediction shows some limitation on complete representation of the system. In addition, the indirect measurement of acceleration from the velocity measured seems to have better prediction of the force.

A comparison of accelerometer and piezofilm-based force balances for hypersonic shock tunnels

“…15,16 Thus, it is evident that the inertia-and stiffnessbased force balances are invariantly used for force measurement in case of objects experiencing hypersonic flows. Although it is possible to measure displacement 17 or velocity to predict the forces in inertia-based methodology, accelerometers are generally preferred. Further, strain gages have been used to obtain the force time histories using stiffness-based force balance.…”

Apt strain measurement technique for impulsive loading applications

“…Response of impulse force can be acquired using intrusive (Sahoo et al 2003) or non-intrusive techniques (Ramesh et al 2014). However, accelerometer based intrusive measurements are more reliable and frequently used.…”