Basic research for acquiring 3D shape information

2021 Fiscal Year Final Research Report

• Project/Area Number: 18K04182
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21030:Measurement engineering-related
• Research Institution: Aichi Institute of Technology
• Principal Investigator: TSUKADA TOSHIHIKO 愛知工業大学, 情報科学部, 教授 (30394638)
• Co-Investigator(Kenkyū-buntansha): 中條 直也 愛知工業大学, 情報科学部, 教授 (30394498)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Keywords: ３次元 / 光切断法 / 投射光強度 / 投射時間 / 露光時間 / 画像計測 / スリット光

Outline of Final Research Achievements

Basic examinations on three -dimensional measurement technology using the optical cutting method were conducted. In order to ensure three -dimensional measurement accuracy, we devised a method to monitor the width of the observed slit light. Depending on the target reflective rate, the projection slit light amount was controlled by power and time, and a three -dimensional measurement was performed in an image with the observed slit light width within the specified range. The control of the slit light was combined with the projection strength of the slit light source laser and the projection time. In addition, the control of the exposure time (shutter speed) on the image sensor side is also widened to widen the range of light receiving. However, the control of the exposure amount due to the change in the aperture (F value) of the lens is not adopted because the optical system changes.

Free Research Field

画像センシング

Academic Significance and Societal Importance of the Research Achievements

３次元形状計測は、生産現場では計測検査のためのニーズが強く、また３次元プリンターへのデータ入力デバイスとしての需要も大きい。提案した方式を採用することで、従来は表面反射率が異なる領域を持つ対象部品の計測では計測精度が確保できないといった課題があったが、反射率に対応した光量、投射時間、露光時間を最適に選定することで、対象部品全体の形状を精度良く計測することが可能となった。