Title:
TRANSDUCER FOR MEASURING VERTICAL DISPLACEMENTS
Document Type and Number:
WIPO Patent Application WO/2010/053392
Kind Code:
A1
Abstract:
The present invention relates to a transducer for measuring vertical displacement in civil engineering structures, such as bridges and overpasses. For that purpose, the transducer carries out hydrostatic levelling over the structure being observed, from a fixed reference position, thus enabling the relative vertical displacement over time to be determined at the various points equipped with said instrument. This transducer is based on the principle of Archimedes and is formed by an outer container (1) containing a liquid in a hydrostatic quasi-equilibrium (2) with the additional hydraulic circuit (3), said container representing the altimetric position of said body in relation to the remaining circuit. A partially immersed mass (6) is coupled by means of a load cell (4) provided with extensiometric sensors (5), allowing the liquid level to be transformed into a force (apparent weight of the body (6)) that can be measured by the load cell (4) in the signal from the extensiometric sensors.
Inventors:
DE AZEVEDO FIGUEIRAS JOAQUIM (PT)
DA SILVA FELIX CARLOS MANUEL (PT)
GUEDES RODRIGUES CARLOS FILIPE (PT)
DA SILVA FELIX CARLOS MANUEL (PT)
GUEDES RODRIGUES CARLOS FILIPE (PT)
Application Number:
PCT/PT2009/000058
Publication Date:
May 14, 2010
Filing Date:
November 05, 2009
Export Citation:
Assignee:
UNIV DO PORTO (PT)
INST POLITECNICO DO PORTO (PT)
DE AZEVEDO FIGUEIRAS JOAQUIM (PT)
DA SILVA FELIX CARLOS MANUEL (PT)
GUEDES RODRIGUES CARLOS FILIPE (PT)
INST POLITECNICO DO PORTO (PT)
DE AZEVEDO FIGUEIRAS JOAQUIM (PT)
DA SILVA FELIX CARLOS MANUEL (PT)
GUEDES RODRIGUES CARLOS FILIPE (PT)
International Classes:
G01C5/04
Foreign References:
| DE10203231C1 | 2003-09-11 | |||
| US3949484A | 1976-04-13 | |||
| US4581931A | 1986-04-15 | |||
| US5693881A | 1997-12-02 | |||
| US4894924A | 1990-01-23 | |||
| US4384410A | 1983-05-24 | |||
| EP0604670A1 | 1994-07-06 | |||
| JPS62299717A | 1987-12-26 | |||
| CH658909A5 | 1986-12-15 | |||
| JPS63120213A | 1988-05-24 | |||
| JPS56162009A | 1981-12-12 | |||
| JPS56162009A | 1981-12-12 | |||
| EP0604670A1 | 1994-07-06 | |||
| JPH10227633A | 1998-08-25 |
Attorney, Agent or Firm:
PEREIRA DA CRUZ, João (S.A.Rua Vitor Cordo, 14 1249-103 Lisboa, PT)
Download PDF:
Previous Patent: ORTHOTIC DEVICE FOR THE CORRECTION OF DEFORMITIES OF THE VERTEBRAL COLUMN
Next Patent: METAL FIBER PRODUCTION MACHINE
Next Patent: METAL FIBER PRODUCTION MACHINE