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 (Rua Dr. Roberto Frias, s/n, 4200-465 Porto, PT)
DA SILVA FÉLIX, Carlos Manuel (Rua do Santeiro, 199, 4465-745 Leça do Balio, PT)
GUEDES RODRIGUES, Carlos Filipe (Rua Dr. Roberto Frias, s/n, 4200-465 Porto, PT)
DA SILVA FÉLIX, Carlos Manuel (Rua do Santeiro, 199, 4465-745 Leça do Balio, PT)
GUEDES RODRIGUES, Carlos Filipe (Rua Dr. Roberto Frias, s/n, 4200-465 Porto, PT)
Application Number:
PT2009/000058
Publication Date:
May 14, 2010
Filing Date:
November 05, 2009
Export Citation:
Assignee:
UNIVERSIDADE DO PORTO (J. PEREIRA DA CRUZ, S.A.Rua Vitor Cordo, 14 -103 Lisboa, P-1249, PT)
INSTITUTO POLITÉCNICO DO PORTO (Rua Dr. Roberto Frias, 712, 4200-465 Porto, PT)
DE AZEVEDO FIGUEIRAS, Joaquim (Rua Dr. Roberto Frias, s/n, 4200-465 Porto, PT)
DA SILVA FÉLIX, Carlos Manuel (Rua do Santeiro, 199, 4465-745 Leça do Balio, PT)
GUEDES RODRIGUES, Carlos Filipe (Rua Dr. Roberto Frias, s/n, 4200-465 Porto, PT)
INSTITUTO POLITÉCNICO DO PORTO (Rua Dr. Roberto Frias, 712, 4200-465 Porto, PT)
DE AZEVEDO FIGUEIRAS, Joaquim (Rua Dr. Roberto Frias, s/n, 4200-465 Porto, PT)
DA SILVA FÉLIX, Carlos Manuel (Rua do Santeiro, 199, 4465-745 Leça do Balio, PT)
GUEDES RODRIGUES, Carlos Filipe (Rua Dr. Roberto Frias, s/n, 4200-465 Porto, PT)
International Classes:
G01C5/04; G01C5/00
Attorney, Agent or Firm:
PEREIRA DA CRUZ, João (J. PEREIRA DA CRUZ, S.A.Rua Vitor Cordo, 14 1249-103 Lisboa, PT)
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