| 摘要 |
PROBLEM TO BE SOLVED: To accurately grasp the contact force of a pantagraph to a trolley line and keep it constant, taking the lift by the dynamic pressure at travel of a trolley car into consideration. SOLUTION: A pantagraph is composed of a slider body 5 which is to be pushed against a trolley line T, a spring 6 which pushes this slider body 5 against the trolley line T, a power sensor 9 which measures the displacement or power of this panel 6, and an actuator 8 which controls the force-up power F<SB>C</SB>of the slider body 5 based on the measured value of this power sensor 9. It is provided with a fluid velocity sensor such as a pitot tube 10 or the like which measures the relative flow velocity of the air in the vicinity of the slider body 5. It finds out the lift force F<SB>L</SB>working on the slider body 5 corresponding to the relative flow velocity of the air in the vicinity of this slider body 5 in advance by test, and adds it to spring force F<SB>K</SB>measured by the power sensor 9, thereby getting the contact force F<SB>C</SB>of the slider body 5 to the trolley line T. It controls an actuator 8 according to this contact force F<SB>C</SB>, thereby keeping the contact force constant. It is also possible to estimate the relative flow velocity of the air, taking the variation factor of surroundings into consideration from the velocity of a train. COPYRIGHT: (C)2008,JPO&INPIT
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