公开(公告)号：US5092818A

公开(公告)日：1992-03-03

申请号：US603609

申请日：1990-10-26

申请人： Carl E. Bohman ,  Howard A. Winey ,  Gilbert W. Linde

发明人： Carl E. Bohman ,  Howard A. Winey ,  Gilbert W. Linde

IPC分类号： A01D75/18 ,  A01F29/16

CPC分类号： A01F29/16 ,  A01D75/187 ,  Y10S56/15

摘要： A forage harvester having a feed mechanism for transporting crop material along a feed path to a rotating cutterhead is provided with a first detector for detecting metal objects in the crop material and a second detector for detecting hard objects. The feed mechanism includes a hollow feed roll rotatable about a fixed shaft and both detectors are supported by the fixed shaft inside the feed roll. The first detector is a metal detector mounted inside a housing supported by the fixed shaft. The second detector is a thin film microphone for sensing air-borne sound waves produced when hard objects impact the feed roll. The second detector may be mounted on the housing or, alternatively, mounted on a support member attached to the fixed shaft. In either arrangement, a vibration-absorbing pad is provided to isolate the microphone from mechanical vibrations occurring in its supporting structure.

摘要翻译： 具有用于将作物材料沿着进给路径输送到旋转刀头的进给机构的饲料收割机设置有用于检测作物材料中的金属物体的第一检测器和用于检测硬物体的第二检测器。 进给机构包括可围绕固定轴旋转的中空进给辊，两个检测器由进给辊内部的固定轴支撑。 第一检测器是安装在由固定轴支撑的壳体内的金属检测器。 第二个检测器是一个薄膜麦克风，用于感测当硬物撞击进给辊时产生的空气声波。 第二检测器可以安装在壳体上，或者替代地安装在附接到固定轴的支撑构件上。 在这两种布置中，提供了一种隔振麦克风与其支撑结构中发生的机械振动的吸振垫。

公开(公告)号：US5078645A

公开(公告)日：1992-01-07

申请号：US603606

申请日：1990-10-26

申请人： Carl E. Bohman ,  Howard A. Winey ,  Richard P. Strosser

发明人： Carl E. Bohman ,  Howard A. Winey ,  Richard P. Strosser

IPC分类号： A01D75/18 ,  A01F29/16

CPC分类号： A01F29/16 ,  A01D75/187 ,  Y10S56/15

摘要： A thin film highly directional audible sound sensor is mounted within a rotatable feed roll of a forage harvester to detect the presence of stones and other hard foreign objects in a crop material being fed past the feed roll to a cutter mechanism. Air-borne sound waves produced by the impact of foreign objects on metal parts of the harvester are detected by the sensor which produces a signal for stopping the crop feed mechanism before the foreign objects reach the cutter mechanism. The sensor is mounted on a stationary support within the rotatable feed roll. Output signals from the sensor control a stop mechanism for the crop feed mechanism via conductors extending through a stationary support shaft for the feed roll, thereby avoiding the need to commutate output signals from the detector.

摘要翻译： 一种薄膜高度方向的声音传感器安装在饲料收割机的可旋转进料辊内，以检测在通过进料辊送入切割机构的作物材料中存在的石头和其它硬的异物。 由异物对收割机的金属部件产生的空气声波由传感器检测到，该传感器在异物到达切割机构之前产生用于停止作物进给机构的信号。 传感器安装在可旋转进给辊内的固定支撑件上。 来自传感器的输出信号通过延伸穿过馈送辊的固定支撑轴的导体控制作物馈送机构的停止机构，从而避免了从检测器换向输出信号的需要。