Matsushita Electric Industrial Co., Ltd.

Toru Akasaka

Toshiaki Nakashima

Taisuke Mori

A method of detecting a longitudinal direction of an inspection object and identifying a configuration of the same. A camera takes an image of an inspection object to obtain a border line of the image. A plurality of vectors having substantially the same absolute value and arrayed continuously on the border line are set, and a distribution of inclinations of all the vectors are obtained. Then, a longitudinal direction of the inspection object is detected on the basis of thus obtained distribution of vector inclination. Accordingly, the detection of a longitudinal direction can be performed accurately about the inspection object regardless of the number of corners on the border line. Furthermore, the detection will be accurately done even if the image includes a noise such as a nozzle.

Method of detecting longitudinal direction of inspection object and

There are irregularities in the thicknesses, longitudinal and lateral sizes of electrical components, which cause placement errors of the electrical components on substrates. Therefore, the thickness, longitudinal and lateral sizes of the electrical component is measured during feeding the electrical component to the substrate. The irregularity of the thicknesses of the electrical components can be corrected by regulating the vertical stroke of a nozzle. The temporary values of the longitudinal and lateral sizes of the electrical component are registered in advance in a computer. When the measured values fall within the allowable range of the temporary values, the correction value of the temporary value based on the measured value is corrected, and the correction value is registered as a new reference value in the computer.

Growing community of inventors

Chikushino, Japan

Toru Akasaka