| 摘要 |
PURPOSE:To realize a strain deciding method which makes a decision in consideration of the depth of a valley without damaging a product nor its base by conveying the tile horizontally with the reverse surface up and measuring the distances between specific positions of the valley and respective upper measurement positions by photosensors. CONSTITUTION:The hook frame tile 11 is conveyed horizontally by a conveyor belt 12 while the reverse surface where a projection 11a for hooking faces up, and the six photosensors 13 are provided at the measurement positions above the tile 11 during the conveyance to measure the distances between the respective necessary positions on the reverse surface of the tile 11 and the respective measurement positions. Each sensor 13 projects laser light to measure the distance on an analog basis by optical trigonometry. Consequently, measured values obtained by the respective sensors 13 are A/D-converted, a microcomputer compares those measured values with values of a standard tile which are measured previously as to measurement positions above it, and a decision device decides respective classes according to classification of valley bridges 1 and 2, etc., so that the decision results are displayed and printed.
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