Title:
圧力変換器
Document Type and Number:
Japanese Patent JP4929435
Kind Code:
B2
Abstract:
A PRESSURE CONVERTER INSUSCEPTIBLE TO THE ERROR OF HYDRAULIC PRESSURE INTRODUCING POSITION OR THE INTERFERENCE OF INSTALLATION DEPTH OF WATER AND PRODUCING A SIGNAL CORRESPONDING TO THE EFFECTIVE SOIL PRESSURE ACCURATELY WHILE REALIZING COST REDUCTION. SINCE FILTERS(34,35) ARE PROVIDED IN AN AIR GAP(10) DEFINED BY TWO RIGID PLATES(13,14) RECEIVING THE SOIL PRESSURE, A HYDRAULIC PRESSURE IS APPLIED BUT SAND PRESSURE IS NOT APPLIED. A LOAD GAUGE(41) INSENSITIVE TO THE HYDRAULIC PRESSURE DETECTS ONLY THE EFFECTIVE SOIL PRESSURE. SINCE A SIGNAL CABLE(51) CAN BE PASSED THROUGH THE AIR GAP(10), A PLURALITY OF PRESSURE CONVERTERS(1,2) CAN BE COUPLED EFFICIENTLY AND SINCE THE SIGNAL CABLE(51,52) CAN BE INSERTED INTERNALLY, A PRESSURE DISTRIBUTED IN THE DEPTH DIRECTION CAN ALSO BE MEASURED ACCURATELY.
Inventors:
Koichi Yabe
Yoshihiko Maeno
Yoshihiko Maeno
Application Number:
JP2001232935A
Publication Date:
May 09, 2012
Filing Date:
July 31, 2001
Export Citation:
Assignee:
NIHON UNIVERSITY
International Classes:
G01L5/00; E02D1/00; E02D1/02; G01L7/00; G01L19/00
Domestic Patent References:
| JP61165629A |
Attorney, Agent or Firm:
Shuji Sanada