PURPOSE: To measure the displacement and the like in the tunnel readily and highly accurately, by constituting the device by a distance measuring unit, angle measuring part, and an operating part, obtaining the distance and the angle to two points, and computing the distance between the two points.
CONSTITUTION: The laser type distance measuring device 2, the angle measuring part 3, and the operating part 4 are provided on a supporting stand 1. The supporting stand 1 is placed on a point O. The distance a1 to a point A1 and a distance a2 to a point A2 are measured by a distance measuring device 2. The rotary angle θ at this time is measured by the angle measuring part 3. These measured values are inputted into the operating part 4 as an electric signal, and the distance X between the two points is obtained by using a specified computing expression. In comparison with a conventional direct scale method, which requires scaffolding and cannot be used for measurment if an obstacle exists, this device can be readily manipulated and the measurement can be instantly performed automatically by one measuring personnel.
TAKASAKI HIDEKUNI
KURATA TADAHIRO
SUGANUMA YOSHINORI
| JPS5219561A | 1977-02-14 |