| 摘要 |
PURPOSE:To provide a circuit board inspecting device capable of correctly determining the center of gravity position of a fitted part item and precisely judging the position drift. CONSTITUTION:A circuit board inspecting device is provided with an image pickup unit 2 photographing an electronic part item C fitted on a circuit board K, an edge position calculating means 3b calculating the edge position based on the intensity data of multiple edge detection lines crossing the electronic part item C, a center of gravity position calculating means 3d calculating the center of gravity position of the fitted part item C based on the edge position, a judging means 3f comparing the obtained center of gravity position with the reference position and judging the position drift of the fitted part item C, and the second edge position calculating means 3c calculating the edge position based on 1/2 of the sum of the coordinates of the intersection of the upper limit and the lower limit of the threshold value specified by the intensity data and the maximum value and minimum value of the intensity data when the detection point of the intensity data does not exist between the upper limit and lower limit of the threshold value of the intensity data obtained by the edge detection line. |
