<p>A method and apparatus for controlling a height of an agricultural equipment component is described in which an average crop height is determined. In one embodiment, the agricultural equipment component is controlled to maintain a predetermined distance from a current top of crop level. If a current top of crop level cannot be determined, a virtual top of crop level is calculated using the average crop height value. The agricultural equipment component is controlled to maintain a predetermined distance from the virtual top of crop level. In another embodiment, the agricultural equipment component is controlled to maintain a predetermined distance from current ground level. If a current ground level cannot be determined, a virtual ground level is calculated using the average crop height value. The agricultural equipment component is controlled to maintain a predetermined distance from said virtual ground level. An ultrasonic sensor is also provided.</p>
申请公布号
CA2870988(C)
申请公布日期
2015.05.19
申请号
CA20132870988
申请日期
2013.06.26
申请人
NORAC SYSTEMS INTERNATIONAL, INC.
发明人
STRELIOFF, WILLIAM;GRIFFITH, JASON;SCHNAIDER, JAMES;LEE, GORDON;HOCKLEY, DEAN