Loading patent…
AssigneeHilti Aktiengesellschaft
InventorsTorsten Gogolla, Andreas Winter, Helmut Seifert
Estimating the term…
A hand-held pulse laser distance measuring device (1) and a pulse reflection mixing method both having an algorithm (3) which controls a microcontroller (2) and which serves to calculate the distance (X) to a measurement object (4) by at least two different time differences (τ1,τ2) between a measurement pulse (6) and a reference pulse (7) with a pulse width (Δt), which time differences (τ1, τ2) are measured with a pulse repetition frequency (f1, f2), respectively, wherein a selection module (5) is provided which selects at least the first pulse repetition frequency (f1) from at least a first frequency amount ({f}1) with at least one other pulse repetition frequency (f1i) in such a way that the amount of the relative time difference |τ·f1| between the reference pulse (7) and the measurement pulse (6) with respect to the period (1/f1) is greater than a lower limit (A) which is at least greater than twice the relative pulse width |Δt f1| with respect to the period (1/f1).
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 (τ1, τ2) between a measurement pulse (6) and a reference pulse (7) with a pulse width (Δt), which time differences (τ1, τ2) are measured with a pulse repetition frequency (f1, f2), respectively, wherein the pulse laser distance measuring device includes a selection module (5) for selecting at least a first pulse repetition frequency (f1 ) from at least a first frequency amount ({f}1) with at least one other pulse repetition frequency (f1i) in such a way that an amount of the relative time difference |τ1·f1| between the reference pulse (7) and the measurement pulse (6) with respect to the period (1/f1) is greater than a lower limit (A) which is at least greater than twice the relative pulse width |Δt f1| with respect to the period (1/f1).
A pulse reflection mixing method for a hand-held laser distance measuring device (1) for calculating a distance (X) to a measurement object (4) with an algorithm (3) which is controlled by a microcontroller (2) with a measurement step (9) for measuring at least two time differences (τ1, τ2) between a measurement pulse (6) and a reference pulse (7) with a pulse width (Δt), which time differences (τ1, τ2) are measured with different pulse repetition frequencies (f1, f2), and a subsequent calculation step (10) for calculating the distance (X) from the at least two time differences (τ1, τ2), wherein the first pulse repetition frequency (f1) is selected from at least a first frequency amount ({f}1) with at least one other pulse repetition frequency (f1i) in a selection step (11) of a selection module (5) between the measurement step (9) and the calculation step (10) in such a way that the amount of the relative time difference |τ1·f1| between the reference pulse (7) and the measurement pulse (6) with respect to the period (1/f1) is greater than a lower limit (A) which is at least greater than twice the relative pulse width Δt f1| with respect to the period (1/fl ).
An algorithm for a hand-held pulse laser distance measuring device and which controls a microcontroller (2) and serves to calculate a distance (X) to a measurement object (4) by at least two different time differences (τ1, τ2) between a measurement pulse (6) and a reference pulse (7) with a pulse width (Δt), which time differences (τ1, τ2) are measured with a pulse repetition frequency (f1, f2), respectively, wherein the pulse laser distance measuring device includes a selection module (5) for selecting at least a first pulse repetition frequency (f1) from at least a first frequency amount ({f}1) with at least one other pulse repetition frequency (f1i) in such a way that an amount of the relative time difference |τ1·f1| between the reference pulse (7) and the measurement pulse (6) with respect to the period (1/f1) is greater than a lower limit (A) which is at least greater than twice the relative pulse width |Δt f1| with respect to the period (1/f1), wherein the second pulse repetition frequency (f2) is selected from at least a second frequency amount {f}2 with at least one other pulse repetition frequency (f2i) in such a way that the amount of the relative time difference |τ2·f2| between the reference pulse (7) and the measurement pulse (6) with respect to the period (1/f2) is greater than a lower limit (A) which is at least greater than twice the relative pulse width |Δt f2| with respect to the period (1/f2).
An algorithm for a pulse reflection mixing method for a hand-held laser distance measuring device (1) for calculating a distance (X) to a measurement object (4) with the algorithm (3) being controlled by a microcontroller (2) with a measurement step (9) for measuring at least two time differences (τ1, τ2) between a measurement pulse (6) and a reference pulse (7) with a pulse width (Δt), which time differences (τ1, τ2) are measured with different pulse repetition frequencies (f1, f2), and a subsequent calculation step (10) for calculating the distance (X) from the at least two time differences (τ1, τ2), wherein the first pulse repetition frequency (f1) is selected from at least a first frequency amount ({f}1) with at least one other pulse repetition frequency (f1i) in a selection step (11) of a selection module (5) between the measurement step (9) and the calculation step (10) in such a way that the amount of the relative time difference |τ1·f1| between the reference pulse (7) and the measurement pulse (6) with respect to the period (1/f1) is greater than a lower limit (A) which is at least greater than twice the relative pulse width |Δt f1| with respect to the period (1/f1), wherein the second pulse repetition frequency (f2) is selected from at least a second frequency amount {f}2 with at least one other pulse repetition frequency (f2i) in such a way that the amount of the relative time difference |τ2·f2| between the reference pulse (7) and the measurement pulse (6) with respect to the period (1/f2) is greater than a lower limit (A) which is at least greater than twice the relative pulse width |Δt f2| with respect to the period (1/f2).
Dependencies are inferred from the claim text.