| 摘要 |
For an automatic control system for continuous cutting-edge control by means of contactless surface measurement at an earth-clearing appliance (11), it is proposed to provide in each case one or more ultrasonic transmitter/receiver combinations (10) at least in front of the earth-clearing appliance (11). The ultrasonic transmitter/receiver combinations (10) are connected to an analysing and control unit (14) which via an actuator (12) controls the absolute position of the earth-clearing appliance in the vertical (height) and horizontal (plane). <IMAGE>
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