| 摘要 |
<p>A paving apparatus 40 is provided with a micropower impulse radar device 58 connected to control a leveller 46. The leveller 46 is a screed provided with actuators 52, 58 for adjusting screed elevation, slope, and extension. The radar senses a reference, such as a string line 60, and operates the actuators 52, 58 to adjust the screed. <IMAGE></p> |
