| 摘要 |
An upstream weigh bridge WB2 is provided and is mechanically separated from a downstream weigh bridge WB3, with a loading chute 18 overlying one of the weigh bridges for dispensing material to the freight cars 10, 12, 14. The upstream weigh bridge WB2 has a length that is less than the distance between the rear axle of one car 12 to be loaded and the front axle of the succeeding car 14. The position of the freight car under consideration is sensed and the chute 18 is opened to load the freight car. The full draft weight of the freight car during loading is detected, taking the weight on the upstream weigh bridge into consideration. The chute is closed when the weight reaches a predetermined amount. The weight of the loaded freight car is determined after the freight car has left the upstream weigh bridge and only the weight on the downstream weigh bridge is taken into consideration. The downstream weigh bridge WB3 may comprise a plurality of mechanically separated weigh bridge sections, operable for full draft weighing of different size freight cars during loading. |
