Laser measurement systems for structural elements’ spacing check

Abstract

In order to improve monitoring of the provisions of parts during assembly, final operations and subsequent operation the laser measuring system is designed to control the angular position of the structure. In relation to the task, it is necessary to realize a small-sized measuring rotary system providing high accuracy (error of not more than 1.5...2 angular seconds) when significant working distance between the test object and the autocollimator (up to 20 meters) and a relatively wide measurement range (10...12 angular. minutes). The method of "straight angled serifs" was constructed to solve this problem. Measuring channel implements a triangulation method. In accordance with the method of each video camera measures the viewing angles of the laser diode located at the checkpoint. Control surface areas has two phases: the control position of seats held without technological loads and after loading. In the result of the revealed analysis the following primary errors were established to determine the precision measurement of linear and angular coordinates of the test object: the measurement error of the coordinates of the center of the image of the measuring mark on the CCD matrix measuring opto-electronic transducer, due to noise and resolution the receiving area and the measurement uncertainty is determined by the deviation of the focal length of the lens from the nominal value.