METHOD OF TUNNELS TECHNICAL CONDITION MONITORING Russian patent published in 2008 - IPC G01B11/16 

FIELD: technological processes.

SUBSTANCE: method includes tunnel separation in sections for working length of laser beam, installation of laser radiation source in tunnel, and installation of target with target homing guidance, scanning range finder, temperature recorder and video camera onto trolley. Then laying of laser beam in target centre is done with the help of homing guidance mechanism, and trolley position is fixed as origin datum with the help of laser beam. After that tunnel technical condition is measured with gauges, results are input into computer, trolley with target and gauges are moved to the following position, its position is fixed with the help of laser beam, measurements are done with gauges, results are input in computer, similarly measurements are done within the limits of the whole section. The source of laser radiation is placed on the border of every section and measurements are repeated until the whole of the tunnel is passed through. Basing on results of all measurements, the virtual basic framework of tunnel technical condition is formed. Tunnel technical condition measurements are done with set periodicity in time, and similar virtual frameworks are created, results of measurements are compared with results of virtual basic framework and tunnel technical condition is determined. Sources of laser radiation may be installed either on stationary devices or on movable trolleys. In order to increase working length of laser beam, a focusing lens is installed.

EFFECT: improves accuracy and provides more detailed information on object condition; possibility to perform measurements of lengthy objects.

3 cl, 1 dwg