Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Soichi Ishikawa

Mamoru Yoshida

Kunio Kozawa

Masaaki Tokui

A headlamp testing method of the invention involves the steps of applying the low beam of the headlamp onto a screen, determining the position of the geometrical center of a closed area of illuminance higher than a predetermined level, determining the position of a cut off line cross point from the position of the geometrical center and a predetermined amount of offset, and determining a presumption line cut off line from the cut off line cross point. The presumption line thus determined is displayed together with a mark which indicates the within which the cross point should fall, and the headlamp beam is judged as being acceptable when the cross point is located within this range.

Automotive headlamp testing method and apparatus

Disclosed is a method of correcting the position of a TV camera for taking up the image of an object to produce video signals of the image, suitable for use in, for example, automotive headlamp beam testing system. The images of reference points which are provided for the purpose of correcting the TV camera position are taken up by the TV camera. Then, the position data representing the positions of the reference points in the field of vision of the TV camera is determined. The position data are compared with predetermined reference point data representing the positions of the reference points in the field of vision of the TV camera as obtained when the TV camera is in the correct position, thereby determining the amount of deviation of the TV camera. Then, the driving unit is operated in accordance with the thus determined amount of deviation to adjust the optical axis of said TV camera so as to eliminate the deviation of the TV camera position. Disclosed also is a method in which the measurement data obtained through the TV camera is corrected in accordance with the amount of deviation of the TV camera, as well as an apparatus suitable for carrying out these methods.

Method of and apparatus for automatically correcting position of TV

A method of and an apparatus for inspecting the quality a casting produced by a die-casting machine, wherein a variety of the operating conditions are monitored in each casting process and thereby the quality of the casting can be judged immediately after the casting.

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Nagoya, Japan

Soichi Ishikawa