Analysis of a Collision Force Meter (original) (raw)

1988

Abstract

This report describes a collision force meter which comprises a simple spring-mass system. Maximum indication is read with the help of a string which is pulled out to maximum position and is held there. The spring and mass are enclosed in a plastic tube. The analysis showed that the meter in its present form gives a value of maximum acceleration undergone by the mass. A collision force meter without damping gives: (1) approximate values of the mean acceleration of tube up to time of maximum indication; (2) change in velocity of tube up to time of maximum indication if this is known or estimated, and (3) mean acceleration of entire collision tube, provided that maximum indication occurs after end of collision pulse. If the collision time is known or estimated, change in velocity of entire pulse is obtained. The meter gives an indication of the collision pulse experienced by the tube. The information given therefore depends on the placing of the tube. The possibility of cheaply measur...

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