| 摘要 |
The invention relates to a method, device and system for the determination of a distance between two objects. It is known to repeatedly perform phase measurements, on the basis of a basis frequency, and, in the process, to increase the frequency in discrete steps and to thus exclude ambiguities, and to eventually obtain a distance-measurement value. The object of the present invention is to provide a corresponding method which makes a relatively accurate measurement possible, even with short measuring times, and even with objects which are moving with respect to one another, as occurs in practical applications. This is achieved by a method for distance measurement wherein from each of said at least two objects several signals are being emitted and analyzed with reference to their phase angel, said signals being at least partially emitted at different frequencies,said method being performed in at least two stages,wherein in a first stage at least one measurement with a frequency difference between frequencies is performed,said frequency differences being selected from a start-measurement frequency difference range and selection of a measurement-frequency difference range on the basis of such at least one measurement in said first stage, wherein in a second stage at least one measurement with a frequency difference between frequencies is performed,wherein said frequency differences are selected from the selected measurement-frequency difference range. |
