CONTACT FORCE MEASURING METHOD AND CONTACT FORCE MEASURING APPARATUS OF PANTOGRAPH

摘要

PROBLEM TO BE SOLVED: To provide a contact force measuring method and a contact force measuring apparatus of a pantograph which can measure a front and rear direction contact force of a collector shoe of a pantograph.;SOLUTION: When the front and rear direction contact force Ff is applied to the collector shoe 12 from a trolley wire 9, a torsion moment Mf is developed in the collector shoe 12, and torsion moments MA, MB are generated on sections A, B of the collector shoe 12. When rotation inertia of the collector shoe 12 in a section AB is In, the torsion moment Mf is expressed by Mf=(-MA+MB)+ In. When a distance from a figure center of the collector shoe 12 to the upper surface is v, the front and rear direction contact force Ff is expressed by Ff=(1/ v)Mf. The torsion moments MA, MB can be obtained by measuring the shearing stress with a strain gauge for two axes. The rotation inertia In can be obtained from measured results with an accelerometer and equivalent mass.;COPYRIGHT: (C)2001,JPO