公开(公告)号：EP0511768A3

公开(公告)日：1994-06-01

申请号：EP92303534.9

申请日：1992-04-21

申请人： NEW HOLLAND BELGIUM N.V.

发明人： Sheenan, Ronald T. ,  Mitchell, Peter G. ,  Bagg, Charles G.

IPC分类号： G01S15/10 ,  G01S15/04 ,  A01D41/14 ,  A01B63/114 ,  G01S15/88

CPC分类号： A01D41/141 ,  G01S15/101 ,  G01S15/108 ,  G01S15/88 ,  Y10S56/15

摘要： An agricultural harvesting machine (10) having a cutting element (22) movably supported thereon is provided with a height sensor (114) including a transmitter and a receiver mounted for movement with the cutting element. The transmitter (114) directs bursts of sound waves in the range of about 5KHz toward the ground and echoes of the bursts are picked up by the receiver, the elapsed time between transmission and reception being an indication of the height of the cutting element above the ground. To distinguish between echoes of the bursts and environmental noise picked up by the receiver, the bursts are encoded by transmitting them in pairs, the bursts of a pair being of fixed duration and separated by a fixed interval of time. The duration of each signal and the time spacing between signals is checked and if they are not of the correct duration or are not separated by the fixed interval of time they are rejected as noise. The time between transmission and reception of a burst is measured to provide an indication of the height of the cutting element. The measured height is compared with a reference or desired height and the difference value is used to control movement of the cutting element to the desired height. There is also enclosed an implement, such as a cutterbar (22) on an agricultural harvesting machine (10), which is automatically position-controlled to maintain a reference position relative to the ground surface. The implement (22) is mounted so that it may be raised, lowered or tilted and the control is such that tilting movements are preceded by, or are carried out concurrently with, a raising or lowering movement when one end of the implement is at the reference position and the other end is between the reference position and the ground surface. Manually operated UP and DOWN switches (332,336) not only control up and down movements of the implement but also inhibit and restore automatic control of implement positioning. A set/reset switch (340) enables manual selection of a predetermined reference position or the selection of the present implement position as the reference position.

公开(公告)号：EP0511768B1

公开(公告)日：1999-10-06

申请号：EP92303534.9

申请日：1992-04-21

申请人： NEW HOLLAND BELGIUM N.V.

发明人： Sheenan, Ronald T. ,  Mitchell, Peter G. ,  Bagg, Charles G.

IPC分类号： G01S15/10 ,  G01S15/04 ,  A01D41/14 ,  A01B63/114 ,  G01S15/88

CPC分类号： A01D41/141 ,  G01S15/101 ,  G01S15/108 ,  G01S15/88 ,  Y10S56/15

公开(公告)号：EP0511768A2

公开(公告)日：1992-11-04

申请号：EP92303534.9

申请日：1992-04-21

申请人： NEW HOLLAND BELGIUM N.V.

发明人： Sheenan, Ronald T. ,  Mitchell, Peter G. ,  Bagg, Charles G.

IPC分类号： G01S15/10 ,  G01S15/04 ,  A01D41/14 ,  A01B63/114 ,  G01S15/88

CPC分类号： A01D41/141 ,  G01S15/101 ,  G01S15/108 ,  G01S15/88 ,  Y10S56/15

摘要： An agricultural harvesting machine (10) having a cutting element (22) movably supported thereon is provided with a height sensor (114) including a transmitter and a receiver mounted for movement with the cutting element. The transmitter (114) directs bursts of sound waves in the range of about 5KHz toward the ground and echoes of the bursts are picked up by the receiver, the elapsed time between transmission and reception being an indication of the height of the cutting element above the ground. To distinguish between echoes of the bursts and environmental noise picked up by the receiver, the bursts are encoded by transmitting them in pairs, the bursts of a pair being of fixed duration and separated by a fixed interval of time. The duration of each signal and the time spacing between signals is checked and if they are not of the correct duration or are not separated by the fixed interval of time they are rejected as noise. The time between transmission and reception of a burst is measured to provide an indication of the height of the cutting element. The measured height is compared with a reference or desired height and the difference value is used to control movement of the cutting element to the desired height.
There is also enclosed an implement, such as a cutterbar (22) on an agricultural harvesting machine (10), which is automatically position-controlled to maintain a reference position relative to the ground surface. The implement (22) is mounted so that it may be raised, lowered or tilted and the control is such that tilting movements are preceded by, or are carried out concurrently with, a raising or lowering movement when one end of the implement is at the reference position and the other end is between the reference position and the ground surface. Manually operated UP and DOWN switches (332,336) not only control up and down movements of the implement but also inhibit and restore automatic control of implement positioning. A set/reset switch (340) enables manual selection of a predetermined reference position or the selection of the present implement position as the reference position.

摘要翻译： 具有可移动地支撑在其上的切割元件（22）的农业收割机（10）设置有高度传感器（114），其包括安装成与切割元件一起移动的发射器和接收器。 发射机（114）将大约5KHz范围内的声波脉冲引导到地面，并且接收器拾取脉冲串的回波，发射和接收之间的经过时间是切割元件的高度指示 地面。 为了区分突发的回波和由接收机拾取的环境噪声，通过成对发送突发来进行编码，一对的突发是固定的持续时间并且以固定的时间间隔隔开。 检查每个信号的持续时间和信号之间的时间间隔，如果它们不是正确的持续时间，或者不被固定的时间间隔分隔，则它们被拒绝作为噪声。 测量突发的发送和接收之间的时间以提供切割元件的高度的指示。 将测量的高度与参考或期望的高度进行比较，并且差值用于控制切割元件的移动到期望的高度。 还包括一种工具，例如农业收割机（10）上的切割器（22），其被自动定位控制以保持相对于地面的参考位置。 工具（22）安装成使其可以升高，降低或倾斜，并且控制使得当工具的一端处于（或）位置时，倾斜运动在升降运动的前面或与之同时进行 参考位置和另一端在参考位置和地面之间。 手动操作的UP和DOWN开关（332,336）不仅可以控制工具的上下移动，而且可以抑制和恢复工具定位的自动控制。 设置/复位开关（340）使得能够手动选择预定的参考位置或者对当前工具位置的选择作为参考位置。