公开(公告)号：US20020154948A1

公开(公告)日：2002-10-24

申请号：US09761941

申请日：2001-01-17

Applicant: TOPCON LASER SYSTEMS, INC.

Inventor： Vernon J. Brabec ,  Wai Y. Chan ,  Raymond O'Connor

IPC: E01C007/06

CPC classification number: E01C19/40 ,  E01C19/004

Abstract: A method is disclosed for a controller to automatically switch to an alternative control mode to control the height of a grading implement when the output of a positioning sensor is not available. According to the invention, the controller recognizes sensor unavailability and automatically switches to an alternative operating mode to maintain control. In one alternative operating mode, the controller recognizes sensor unavailability and automatically routes the control signal from the unaffected side to the control channel for the affected side. In another alternative operating mode, the controller monitors the current value of an additional sensor for an alternative mode of control until one of the primary sensors becomes unavailable, and then automatically switches to the alternative mode for the affected side, using the last known value for the alternative mode as the set point.

Abstract translation: 公开了一种用于当定位传感器的输出不可用时，控制器自动切换到替代控制模式以控制分级工具的高度的方法。 根据本发明，控制器识别传感器不可用性并且自动切换到替代操作模式以维持控制。 在一种替代操作模式中，控制器识别传感器不可用性，并且将控制信号自动地从受影响侧路由到受影响侧的控制信道。 在另一种可选的操作模式中，控制器监视附加传感器的当前值用于替代控制模式，直到主传感器之一变得不可用，然后自动切换到受影响侧的替代模式，使用最后已知的值 替代模式作为设定点。