Method and apparatus for measuring blasting position in tunnel construction

摘要

Azimuth and latitude values for two predetermined reference points (which should exist on the same plane perpendicular to the center line of the road) measured in advance at an arbitrary measurement position are given from two encoders , And the distance to the reference point is measured by a distance measuring device using a laser beam and input to the computer.;Thus, the data input to the computer consists of distance, azimuth, and latitude.;A program for calculating the position of an arbitrary measurement point using these input data and comparing the distance of the design data with the distance of ceiling bending of the tunnel currently excavated at this point and a program for comparing the blasting position of the pre-To develop a program for automatically displaying the program.;At the same time, a circuit for driving the distance measuring device using a stepping motor and an encoder is produced in connection with a control program.