Abstract
In this work, we investigated spacer grid straps using a strap inspection device with a laser displacement sensor. Non-contact measurement using laser displacement sensors has the advantages of high speed and automated measurement. The strap inspection device consisted of a jig, laser displacement sensor, and signal processing circuit. The variation in the output value of the strap inspection device was measured. The mid inner-strap of a spacer grid was used as the specimen. Prior to the experiment, we predicted an approximate expression for the experimental output values, and then performed the experiments to verify our predictions. In this study, we have demonstrated the possibility of counting the number of straps, and of identifying no-chamfered edges, using a strap inspection device with a laser displacement sensor.
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