Differential vibrating-wire strain gauge for concrete deformation measurements

• Autorzy: Kanciruk Adam , Matus Elżbieta

Identyfikatory

DOI

10.24425/bpasts.2024.151379

• Języki publikacji: EN

Abstrakty

EN

The basic measuring element of vibrating-wire strain gauges is a steel piano wire, functioning in the elastic range. This element is constantly under tension. Therefore, its material gradually deforms permanently. This deformation causes its stress to relax. This relaxation results in measurement errors of the strain gauges. This error, as demonstrated by both in situ and laboratory tests, can reach values of even several percent of the strain gauge measuring range (FSR) over periods of 10 years. Therefore, a concept of a differential strain gauge was proposed, for the construction of which two measuring wires would be used. Changing the input value of the strain gauge, i.e. a displacement of one of its anchors in relation to the other one would cause one wire to lengthen while the other wire shortened identically. The measured displacement would be calculated based on the difference in the frequency of the wire vibrations. In this way, the influence of the simultaneous relaxation of the wires on the measurement result would be greatly reduced. Based on this concept, a prototype differential strain gauge for measuring concrete deformation was realized. In addition to two wires, it also contains two electromagnets, placed together with the wires in a common body-housing. After the strain gauge was assembled, its first tests were carried out under laboratory conditions.

Słowa kluczowe

EN

vibrating-wire measuring instruments; strain gauge; measurement of displacement; measurement of deformation

PL

pomiar odkształceń; pomiar przemieszczeń; czujnik tensometryczny; przyrząd pomiarowy z wibrującym drutem

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2024
• Tom: Vol. 72, nr 6
• Strony: art. no. e151379
• Opis fizyczny: Bibliogr. 21 poz., rys., tab., wykr.

Twórcy

autor

Kanciruk Adam

• Strata Mechanics Research Institute Polish Academy of Sciences, Poland

• https://orcid.org/0000-0001-7965-6528

autor

Matus Elżbieta

• Strata Mechanics Research Institute Polish Academy of Sciences, Poland

• https://orcid.org/0000-0002-9808-3101

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).