| 摘要 |
A pantograph, used by an electric train to pick up electric power from an overhead electrical line incorporates a pickup head which includes at least one contact strip (33) connected by left and right side beams (32) which are pivotally connected to a support frame (24, 22). Each side beam (32) is shaped so as to define a load cell structure to transmit forces, the load cell structure incorporating strain gauges so that the vertical forces on each side of the pickup head can be measured. The side beam (32) is slotted to provide parallel bars (50), forming a hollow rectangle, between lower and upper narrow support bars (48,52). |
