| 摘要 |
PURPOSE:To improve precision of the titled measuring method without skill by measuring a liquid pressure while drawing a pressure sensor connected with a liquid storage tank via a hose by its signal line or the like and moving it in an underground pipe, and performing arithmetic of the difference between the above-mentioned liquid pressure and liquid pressure on the ground surface. CONSTITUTION:The hose 2 coming from a water tank 1 is connected with the pressure sensor 4 via a hose reel 3 and the signal line 5 of the other end of the sensor 4 is connected with an arithmetic unit 7 and a recorder 8 via a winch 6. Then, the sensor 4 is first provided to the ground surface to measure the water pressure and the depth is set at zero. The winch 6 is next wound up to measure the length of the signal line 5 wound up and also, the arithmetic unit 7 and recorder 8 are operated while moving the sensor 4 in the underground pipe 9 and the depth of the underground pipe 9 is continuously recorded from the difference with the liquid pressure on the ground surface. |
