| 摘要 |
PURPOSE: A crack strain measuring apparatus is provided to easily measure crack strain by reducing the weight and the volume of the existing measuring apparatus, and reduce a measurement error by using a dial gauge measuring minute displacement. CONSTITUTION: A crack strain measuring apparatus includes a body(2), an LN roller guide(4) moving following a guide rail(6), contacting with a spindle(16) on one side, and attaching a fixing pin(8) to the lower vertically downward; a dial gauge(14) installed on the top side of a body(2) and having the spindle contacted with the LN roller guide, and a couple of pointers each forming a conic hole(20) in the center for inserting an end part of the fixing pin and a movable pin(10).
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