| 摘要 |
PURPOSE:To measure vertical static absolute displacement at many points of a bridge or the like and to preserve data for rechecking, by connecting plural measuring vessels to a closed vessel successively through a switching device and by ecording pressure of the closed vessel. CONSTITUTION:Cylindrical measuring vessels 1-n are installed at respective measuring points, and a hose 4 is taken out from the lower part of each measuring vessel and is connected to a switching device 5 having a switching valve 6. The exit of the switching device 5 is connected to a measuring closed vessel 7 by a hose 13. A complete closing cover 8 is fitted to the vessel 7 and is provided with an air vent 9. A pressure sensor 10 is fitted to the side wall of the vessel 7, and the output of the sensor is amplified by 11 and is supplied to a recorder 12. At the measurement time, water is poured into respective vessels, and the level at measuring points is detected by pressure in the vessel 7. |
