2. Sensor wiring diagram
2.1 Bridge circuit principle
Consider a circuit consisting of four equal resistors R 1 , R 2 , R 3 , R 4 connected in a bridge configuration (figure 2 ). If we supply it with a current source P along a diagonal, we have at equilibrium a zero voltage between B and D. The variation of any one of the resistors causes a voltage V s to appear between B and D, which can be measured by an instrument G. For very small variations in resistance (of the order of a few microohms in...
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Sensor wiring diagram
Mechanical design of sensors
Bibliography
Theses
- - http://www.sudoc.abes.fr
- PY (R.) - Comportement mécanique et électrique de films minces à haute température : application aux jauges d'extensométrie. - Paris 11, Orsay (1998).
Standardization
Extensometry does not lend itself to the establishment of standards as such. However, the documentation booklet below recalls, among other things, the concepts of elasticity which form the basis of extensometry.
- Résistance des matériaux et essais mécaniques de matériaux. Vocabulaire. - NF X 10-011 - 3-58
Manufacturers. Suppliers
Abelex
AMC.
ATEX (Applications of Extensometry Techniques).
Baléa SARL.
Bell and Howell France SA. - absorbed by Kodak : http://wwwfr.kodak.com
Beta. : http://www.betalasermike.com
...French and foreign organizations
The applications of extensometry are so varied that the technique is occasionally discussed by numerous technical associations. However, a number of industrial countries have set up associations or groups specializing in experimental stress analysis, of which extensometry is a major branch.
France
Groupement pour l'Avancement des Méthodes d'Analyse des Contraintes (GAMAC)....
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