Pressure converter
US7066032B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2002 |
| Grant date | Jun 27, 2006 |
| Priority date | — |
| Expiry date | May 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L19/0636
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 are provided in an air gap defined by two rigid plates receiving the soil pressure, a hydraulic pressure is applied but sand pressure is not applied. A load gauge insensitive to the hydraulic pressure detects only the effective soil pressure. Since a signal cable can be passed through the air gap, a plurality of pressure converters can be coupled efficiently and since the signal cable can be inserted internally, a pressure distributed in the depth direction can also be measured accurately.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.