| 摘要 |
A spreader apparatus is provided. The spread apparatus includes material storage means for storing a spreadable material, a first spinner means adapted to spread the spreadable material on a first side of the spreader and a second spinner means adapted to spread the spreadable material on a second side of the spreader opposite the first side. A speed of each spinner is variable independently of a speed of the other spinner. The apparatus also includes transport means for transporting the spreadable material from the material storage means to the spinners, which is operable to supply the spreadable material to the first spinner means at a rate which is independent from a rate at which it supplies spreadable material to the second spinner means. The spreader further includes Global Positioning System (GPS) receiver means for sensing the position of the spreader and providing an output signal indicative of a position of the spreader to a control means. The control means calculates a required pattern and density of material to be spread by the spinner means based on a comparison of the position of the spreader to a preferred position of the spreader, and controls a rate at which the transport means transports the material to the spinners, and the speed of each spinner means, in order to obtain the required pattern and density of spread material.
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