| 摘要 |
The invention involves a set for measuring the linear strain of materials, comprising at least two measuring elements ( 1 ) fitted with measuring blades ( 2 ) with parallel axes of the measuring blades ( 2 ), attachable to the measured material, and a portable reading device ( 3 ) with an impression surface ( 4 ) made of a material with dimensional stability and strength lower than the strength of the material of the measuring elements ( 1 ) and/or the portable measuring device. The measuring blades ( 2 ) are fitted with fixtures ( 5 ) in the center and the measuring elements are fitted with necks ( 6 ) and a tapered end ( 7 ) at the bottom; the measuring elements ( 1 ) are attached to the surface of the measured material using a resin-based adhesive. The measuring elements ( 1 ) are kept in a transport preparation ( 8 ), comprising a plotting board with holes ( 9 ) for the measuring elements ( 1 ), following the precision setting of parallelism of the axes of the measuring blades ( 2 ); the joint between the measuring elements ( 1 ) and the transport preparation ( 8 ) has a lower strength than the joint between the measuring elements ( 1 ) and the measured material.
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