| 摘要 |
<p>AB VOLVO "Device for orienting a lifting means, for example, in relation to a load" A device for orienting a movable object such as a lifting means in a certain position relative to a second object such as a load, said device having light-emitting means for illuminating the second object so that an image with lighter and darker fields is created thereon, a photoelectric detector movable together with the movable object to scan said image, electronic control equipment connected to the detector for receiving signals therefrom, and operating equipment for the movable object, connected to the control equipment to receive signals therefrom and to orient the movable object,dependent on the signals of the photoelectric detector,to the control equipment.</p> |
