| 摘要 |
Provided is a contact force measurement method and a contact force measurement device with which the contact force of a pantograph can be measured using image processing, even for pantographs with a structure that prevents the collector head and spring from being directly photographed. Images of a pantograph (100) are captured, a plurality of springs (102) is combined, and a virtually synthesized spring (1) is deemed to exist in the center of the pantograph (100) in the width direction. From the images, the partial relative displacement between the position corresponding to a collector head (101) in the center of the pantograph (100) in the width direction and a collector head support (104) is calculated. The elasticity of the virtually synthesized spring (1) is calculated by determining the difference between the relative displacement and the natural length of the virtually synthesized spring (1). The spring reaction force is determined by multiplying the spring constant of the virtually synthesized spring (1) by the elasticity, the lifting force action on the collector head is determined from the vehicle travel speed data when the images and time have been synthesized, and the spring reaction force, inertia force, and lifting force are then added to determine the contact force. |
