METHOD FOR MULTI-TARGET-ENABLED RESOLUTION OF A PHASE AMBIGUITY

摘要

In order to derive distance information according to the phase measuringprinciple, a periodic signal with at least two, in particular modulated,wavelengths .lambda.i are transmitted to two or more objects, theirreflections are received again and the associated phases .phi.i are determinedand decomposed into their individual object phases .phi.ij which are assignedto the J objects. In order to resolve phase ambiguities, an ambiguity intervalin which at least one object is located is divided into cells (5) with adefined width, with each cell (5) being assigned a counter reading and adistance. The counter reading is incremented for the cells (5) which areassigned to a possible object distance, with the incrementation being carriedout for a periodicity sequential variable and for all the phases. An absolutephase or a true object distance Dj from the at least two objects is determinedfrom the distribution of the counter readings.