Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-02-25
1989-10-24
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356376, G01N 2186
Patent
active
048764558
ABSTRACT:
The invention is an automated solder joint inspection system for determining the quality of a specular soldered joint through examination of the shape of the joint surface using a series of point light sources and the associated highlight reflections from the joint surface. The light from the point light sources, which is directed toward the solder joint, is reflected in a pattern from the solder joint to an array of light responsive transducers, such as a camera, at a fixed location. Utilizing the intensity values from the light responsive transducer array, a binary grid map is generated for the reflections from each point light source. Using known surface features of solder joints along with curve fitting techniques, a series of grid maps may be mathematically interpreted to reconstruct the solder joint surface. A rule-based system, through comparison with acceptable solder joint surface features, evaluates and classifies the joint for an acceptability determination.
REFERENCES:
patent: 3976382 (1976-08-01), Westby
patent: 4185918 (1980-01-01), DiMatteo et al.
patent: 4238147 (1980-12-01), Stern
patent: 4427880 (1984-01-01), Kanade et al.
patent: 4452534 (1984-06-01), Gribanov et al.
patent: 4472056 (1984-09-01), Nakagawa et al.
patent: 4473750 (1984-09-01), Oshida et al.
patent: 4508452 (1985-04-01), DiMatteo et al.
patent: 4634879 (1987-01-01), Penney
patent: 4650333 (1987-03-01), Crabb et al.
patent: 4657393 (1987-04-01), Stern
patent: 4695163 (1987-09-01), Schachar
patent: 4748335 (1988-05-01), Lindow et al.
Nayar Shree K.
Sanderson Arthur C.
Weiss Lee E.
Nelms David C.
Oen William L.
Sutcliff W. G.
Westinghouse Electric Corp.
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