Patent ID: 7349820

Claim:
A method for determination of the position (x, y) of at least one reflection point (R 1-2 ) on the surface of an obstruction, comprising the following steps: calculation of a first distance (r 1 ) between the reflection point and a first position (x 1 ) of a distance measurement apparatus, from a time period between transmission of a first transmitted signal from the distance measurement apparatus at the position (x 1 ) to the obstruction and reception of a received signal as part of the transmitted signal reflected on the obstruction; characterized by calculation of a second distance (r 2 ) of the reflection point with respect to a second position (x 2 ) of the distance measurement apparatus analogously to the calculation of the first distance (r 1 ); and calculation of the position (x, y) of the reflection point (R 1-2 ) with the aid of the triangulation method from a first value pair (x 1 , r 1 ), comprising the first position (x 1 ) of the distance measurement apparatus and the first distance (r 1 ) and a second value pair (x 2 , r 2 ), comprising the second position (x 2 ) of the distance measurement apparatus and the second distance (r 2 ); characterized in that the x coordinate (x) of the position of the reflection point (R 1-2 ) is calculated using the following equation (1): x = r 2 2 - r 1 2 - x 2 2 + x 1 2 2 * ( x 1 - x 2 ) ( 1 ) x 1 represents the first position of the distance measurement apparatus; x 2 represents the second position of the distance measurement apparatus; r 1 represents the first distance of the reflection point(R 1-2 ); r 2 represents the second distance of the reflection point(R 1-2 ); and outputting the position (x, y) calculated.