Patent ID: 6115112
Filing Date: 2000-09-05
Classification: G01S

Abstract:
Distance measuring device with propagation time measuring, where the instrument is equipped with a light source unit (3) for sending measuring light signals through the atmosphere to a target and a light receiver unit for receiving measuring light signals reflected by the target, wherein the distance measuring device includes a coarse measuring means for coarse measuring during a coarse measuring procedure and a fine measuring means for fine measuring during a fine measuring procedure, wherein the coarse measuring means fixes within a measuring time interval at least one time point after which the measuring light signal reflected from the target can be expected to appear, and the fine measuring means controls the light source unit to emit a number of light pulses per measurement and perform signal information collection in the measuring time interval for each measurement in a measuring time region after time point fixed during coarse measuring, and to combine the measuring results for the measuring during the fine measuring procedure with each other.