| 摘要 |
PROBLEM TO BE SOLVED: To facilitate determination of presence or absence of a trouble regarding laser position measurement in a small bore pipe propelling machine having a constitution wherein a laser light from a laser transit installed at a starting shaft is received by a laser target installed at a leading body and is computed and the positional relation of the leading body to a designed line is displayed on a screen. SOLUTION: A main computing means 5A which computes the positional relation of the leading body to the designed line on the basis of data on the position measured at the laser target 4, a visual image computing means 5B which computes the image of a visual image obtained by the laser transit 3 and a display means 5C which displays the results of computation, are provided. Moreover, an input means which inputs the positional data based on the visual image obtained by the laser transit 3, a comparative computation means which computes the positional relation and a display means which displays the individual results of computation in a mode of enabling visual comparison thereof, are provided. According to this constitution, the visual image and the display can be presented and compared in the same form. |
