| 摘要 |
PCT No. PCT/SE95/00330 Sec. 371 Date Sep. 30, 1996 Sec. 102(e) Date Sep. 30, 1996 PCT Filed Mar. 28, 1995 PCT Pub. No. WO95/26512 PCT Pub. Date Oct. 5, 1995The present invention provides a method and a system for proximate field orientation of an autonomous device and utilizes a transmitted wave having a first frequency of slow propagation, whereby reflections from obstacles within a proximate area are detected. According to the present invention receivers are arranged in a slanted plane or preferably along a curved base-line to, in a simple way, obtain a three-dimensional direction to an obstacle reflecting the frequency of slow propagation. Additionally, an absorber or a screen or a combination thereof is arranged above at least one receiver to act as an "eyebrow" attenuating undesired reflections which at the receiver come from overhead. Additionally, at least one of the receivers along the generally curved base-line is arranged differently in height in relation to the remaining receivers, and preferably the most outer receiver on each side in the line of receivers along the generally curved base-line is arranged differently in height in relation to the remaining receivers for an improvement of the three-dimensional resolution. |
