公开(公告)号：US20070181318A1

公开(公告)日：2007-08-09

申请号：US11348867

申请日：2006-02-07

申请人： Gregory Laudick ,  Derek Eagles ,  William Alexander ,  Jeffrey Dawson ,  Thomas Boe

发明人： Gregory Laudick ,  Derek Eagles ,  William Alexander ,  Jeffrey Dawson ,  Thomas Boe

IPC分类号： A01B59/04

CPC分类号： E02F3/845 ,  E02F3/6481 ,  E02F3/651 ,  E02F3/656 ,  E02F3/847

摘要： A towed scraper control system automatically lowers the scraper blade to a working position at the start of a scraping operation according to a certain method. The method includes sensing a ground speed of the vehicle and sensing a draft force applied by the scraper to the vehicle. With the vehicle pulling the scraper at or near a target ground speed over terrain with the blade positioned above a surface of the ground, the blade is automatically lowered with respect to the scraper frame at a first rate until the blade begins to engage the surface of the ground. Thereafter, while the vehicle continues to move forward at or near the target ground speed, the blade is lowered with respect to the frame at a second rate and for a duration related to the sensed ground speed so that lowering of the blade stops when the scraper wheel begins to enter a cut produced by the blade. With the blade fixed with respect to the scraper frame, the scraper is moved forward at the target ground speed for a distance determined as a function of the sensed draft force. Thereafter, the blade is raised with respect to the frame at a rate which matches a lowering rate of the wheels as they descend along the cut, and the blade is raised at this matching rate until the position of the blade matches the position of the blade after the first lowering step. Preferably, the second rate is slower than the first rate.

摘要翻译： 拖曳刮刀控制系统根据某种方法在刮削操作开始时将刮刀自动降低到工作位置。 该方法包括感测车辆的地面速度并感测由刮板施加到车辆的牵伸力。 当车辆将刮刀定位在地面上或接近目标地面速度时，其中刀片位于地面的上方，刀片以第一速率相对于刮刀架自动下降，直到刀片开始接合 地面。 此后，当车辆继续以目标地面速度接近或接近目标地面速度时，叶片以第二速率相对于框架降低并且持续与感测到的地面速度相关的持续时间，使得当刮刀 轮开始进入刀片产生的切割。 当刀片相对于刮刀架固定时，刮刀以目标地面速度向前移动一定距离，作为感测到的牵伸力的函数确定。 此后，叶片相对于框架以与沿着切口下降的轮的下降速度相匹配的速率升高，并且叶片以该匹配速率升高，直到叶片的位置与叶片的位置匹配 经过第一个下降步骤。 优选地，第二速率比第一速率慢。