Devolopment of a strain measurement method for non-plane specimens by means of computer picture processing.

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  • 画像処理を用いた曲面体のひずみ計測法の開発
  • ガゾウ ショリ オ モチイタ キョク メンタイ ノ ヒズミ ケイソクホウ ノ

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Abstract

Testing of Fast Breeder Reactor components is often conducted at an elevated temperature such as 550°C, where strain measurement using weldable strain gauges specially manufactured for high temperature use is costly and inappropriate for large and repeated strains. To solve this, a picture processing-utilized strain measurement method in combination with stereoscope is proposed. With this method, strain measurement of non-plane specimens can be performed remotely. A personal computer-based system that employs a solid state image sensor was also developed. The system satisfactorily distinguished marks from noise, and was easy to operate. A verification test performed on a bellows specimen showed that the strain error was reasonable considering the limitations of the hardware. The test also confirmed the validity of the present strain measurement system and the practicability of the proposed method for large strain measurement.

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