Akira Torao

Inspection system using still vision for a rotating laser-textured dull roll

A new inspection system measuring micro-craters on a rotating laser textured dull roll surface has been developed. This system provides a video image of the rotating roll surface as a still vision using a stroboscopic light and a rotating mirror, and measures the diameter and the pitch of the micro-craters by an image processing method. The system can measure the pitch and the diameter of the micro-craters in the accuracy within ±10 mm errors when the circumferential speed of the dull roll is lOm/sec.

Development of an on-line detection system for internal flaws in as-hot-rolled steel strip using ultrasonic probe array

A new ultrasonic immersion testing method for the detection of internal flaws in a running steel strip has been developed. An ultrasonic detecting system using this method has been installed in No.6 Pickling Line at Kawasaki Steel Chiba Works. It is confirmed that an inclusion with 5 /spl times/ 10/sup -5/ mm/sup 3/ in the minimum volume in running steel strip can be detected with signal-to-noise ratio in the range of 9- 10dB.

A Portable Fingerprint Detection Apparatus By Using Laser Beam

A laser assisted fluorescence method followed by high-speed image processing has been newly developed for the rapid in-situ detection of latent prints on several kinds of surfaces. It is particularly effective for new building materials, leathers and adhesive tapes, sometimes even an extended period has elapsed. The new apparatus has already been used by police department in several countries and has contributed to law enforcement.

On-Line Color Measurement System For Steel Sheets

Two types of new on-line color measurement systems were developed for the continuous measurement of the color difference or the whiteness of travelling steel sheets. Applying these systems to a production line of colored galvanized steel sheets, it was found that the color difference measured by them coincided well with those obtained by a tristimulus colorimeter.