公开(公告)号：US20120255353A1

公开(公告)日：2012-10-11

申请号：US13438369

申请日：2012-04-03

申请人： Tatsuro Kozaki ,  Hiroshi Yatabe ,  Isao Hara ,  Toshiro Akahira

发明人： Tatsuro Kozaki ,  Hiroshi Yatabe ,  Isao Hara ,  Toshiro Akahira

IPC分类号： G01F23/30

CPC分类号： G01F23/72 ,  G01F23/0038 ,  G01F25/0061

摘要： To achieve a fluid level measurement instrument requiring no detecting pipe that can accurately measure over a long period of time a fluid level in a tank for storing therein fluid without having to use a detecting pipe for sampling the fluid from the tank. A balance tube 41 has no detecting pipes and a solenoid coil 45 is wound around an outside of the balance tube 41. A float 46 containing therein a magnetic material 47 is disposed inside the solenoid coil 45. A cover 59 formed, for example, of metal covers an outer surface of the float 46 to prevent entry of fluid and hydrogen from outside. The float 46 moves according to a fluid level in the balance tube 41, which results also in inductance of the solenoid coil 45 being changed. Measuring the inductance of the solenoid coil 45 allows the fluid level of the balance tube 41 to be measured without having to use the detecting pipe.

摘要翻译： 为了实现不需要检测管的液位测量仪器，可以在长时间内精确地测量用于储存流体的罐中的液位，而不必使用用于从罐中取样流体的检测管。 平衡管41没有检测管，螺线管线圈45缠绕在平衡管41的外侧。在螺线管线圈45的内侧设置有包含磁性材料47的浮子46.例如， 金属覆盖浮子46的外表面以防止流体和氢气从外部进入。 浮子46根据平衡管41中的液位移动，这也导致螺线管线圈45的电感改变。 测量螺线管线圈45的电感允许平衡管41的液位测量而不必使用检测管。