Title:
APPARATUS FOR INSPECTING MOUNTING OF PRINTED CIRCUIT BOARD
Document Type and Number:
Japanese Patent JPH04208803
Kind Code:
A
Abstract:
PURPOSE:To achieve the rationalization of inspection by detecting the inclination of a board from the three-dimensional data at three points where no parts are mounted on the board and setting the plane parallel to the board to a threshold value to binarize said data. CONSTITUTION:An X-Y plane is set to a reference surface and three points where no parts are mounted of a printed circuit board 11 respectively inclined by angles theta1, theta2 with respect to X and Y-axes are selected to calculate coordinates and the plane S2 parallel to the surface of the board 11 and separated from said surface by a distance (h) is set to a threshold value to binarize three-dimensional data to obtain a binary image. The size, position and inclination of each part are calculated on the basis of the obtained binary image and compared with preset standard values. By this method, the inspection accuracy of the mounting state of parts can be enhanced even when the printed circuit board is inclined.
Inventors:
INOUE TAKESHI
SERITSU MITSUO
SERITSU MITSUO
Application Number:
JP34127190A
Publication Date:
July 30, 1992
Filing Date:
November 30, 1990
Export Citation:
Assignee:
YASKAWA ELECTRIC CORP
International Classes:
G01B11/00; G01B11/24; G01N21/88; G01N21/93; G01N21/956; G06T1/00; H05K13/08; (IPC1-7): G01B11/00; G01B11/24; G01N21/88; G06F15/62; H05K13/08