High Precision 3-D Measurement System using Flying Image
Grant-in-Aid for International Scientific Research.
|Allocation Type||Single-year Grants|
|Research Institution||Osaka University|
INOKUCHI Seiji Professor, Faculty of Engineering Science, Osaka Univ., 基礎工学部・システム工学科, 教授 (90029463)
KIM Tae hyo Professor, Department of Electronic Engineering, Kyungnam Univ., Prof.
MANABE Yoshitsugu Research Associate, Faculty of Engineering Science, Osaka Univ., 基礎工学部・システム工学科, 助手 (50273610)
KATO Hirokazu Research Associate, Faculty of Engineering Science, Osaka Univ., 基礎工学部・システム工学科, 助手 (70221182)
|Project Period (FY)
Completed(Fiscal Year 1995)
|Keywords||Flying Image Method / line sensor / barrel-shaped distortion / 3-D measurement / high accuracy measurement / distortion correction / Slit Light Projiction Method / carribration / laser diode|
We studied this theme mainly about 4 points as follows ;
1. Character analysis of the Flying Image Method
In the case of Flying Image Method, the shape of the image-observing surface is like a cylinder. But the shape of the focal plane is flat. Because of difference of the shape of both surfaces, the barrel-shaped distortion occurs in the input image. We analyzed this barrel-shaped distortion and developed the method to correct the distortion in the input image.
2. Making the Flying Image Sensor
We used CCD line sensor with 2048 pixels as a photo sensor. We used also conventional camera lens (35mm/55mm). The axis of lens and line sensor is crossed in a right angle, and the axis of mirror rotation arranged on the cross point. The mirror is rotated by the stepping motor controlled by the NEC-PC9801.
3. Construction of the 3-D Measuring System using Slit Light Projection Method We constructed the 3-D measuring system using Slit Light Projection Method. The System is constructed using slit light laser diode, the Flying Image sensor, and linear stage. They are fixed by L-angle steel flames. The laser slit light is projected perpendicularly down to the linear stage, and reflected light is measured to the sensor on the diagonal upper position.
4.3-D Measurement Experiment
In the first stage of the 3-D measurment, a plane that the vertical slit is drawn measured. The correction of the barrel-shaped distortion is practiced using this image.
In the second stage, the carribration is practiced. We used a standard seramic block gage for the carribration and the 3-D measurement.
In the final stage, the measurement is practiced. The distance from the sensor to the object is 280mm and measuring area size is 70mm*55mm. As a result, the accuracy 0.07mm is obtained.
Research Output (12results)