Patent ID: 7714990
Filing Date: 2010-05-11
Classification: G01S

Abstract:
1. A hand-held pulse laser distance measuring device with an algorithm ( 3 ) which controls a microcontroller ( 2 ) and which serves to calculate a distance (X) to a measurement object ( 4 ) by at least two different time differences (τ 11 , τ 12 ) between a measurement pulse ( 6 ) and a reference pulse ( 7 ) with a pulse width (Δt), which time differences (τ 11 , τ 12 ) are measured with a pulse repetition frequency (f 11 , f 12 ), respectively, wherein the pulse laser distance measuring device includes a selection module ( 5 ) for selecting at least a first pulse repetition frequency (f 11 ) from at least a first frequency set ({f} 1 ) with at least one other pulse repetition frequency (f 1i ) in such a way that the condition |τ 1i ·f 1i |>A>2·|Δt λ ·f 1i | is satisfied with a pre-selected lower limit (A), a relative time difference |τ 1i ·f 1i | with respect to period 1 |f 1i and a relative pulse width |Δt λ ·f 1i |, whereby i=1,2.