Sensor for measuring elongations
First Claim
1. A sensor for measuring the elongation of material surrounding a structure member in a bore, comprising a cylinder-shaped body made of an elastomeric material, and at least ne resistive wire strain gauge arranged on the circumference of said cylinder-shaped body, a means for pressing said at least one resistive wire straing gauge against the inner wall of the bore in such a manner that said at least one resistive wire straing gauge is in contact with the inner wall by resistive forces in a force-locked manner in order to measure the elongation caused by an acting of force onto the structure member having the bore.
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Accused Products
Abstract
The sensor which is adapted to e inserted into a bore includes a cylinder-shaped body made of an elastomeric material and four resistive wire strains are uniformly distributed around its circumference. This body of an elastic material can be pressed together by means of tensioning members. This causes a deformation of the body in radial direction, such that the resistive wire strains are pressed against the wall of the bore and contact same in a force-locked manner. At the same time, the sensor is held arrested in the bore. Accordingly, an elongation of the structural member is directly transmitted onto the resistive wire strains, such that errors in the signal transmission are avoided.
24 Citations
8 Claims
- 1. A sensor for measuring the elongation of material surrounding a structure member in a bore, comprising a cylinder-shaped body made of an elastomeric material, and at least ne resistive wire strain gauge arranged on the circumference of said cylinder-shaped body, a means for pressing said at least one resistive wire straing gauge against the inner wall of the bore in such a manner that said at least one resistive wire straing gauge is in contact with the inner wall by resistive forces in a force-locked manner in order to measure the elongation caused by an acting of force onto the structure member having the bore.
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8. A sensor for measuring the elongation of material in which a bore is disposed, comprising a cylinder-shaped body made of an elastomeric material, and at least one resistive wire strain gauge arranged on the circumference of said cylinder-shaped body, means for pressing said at least one resistive wire straing gauge against the inner wall of the bore in such a manner that said at least one resistive wire straing gauge is in contact with the inner wall by resistive forces in a manner which measures the elongation caused by the action of the resistive force onto the cylinder shaped body within the bore.
Specification