A Study on Autonomic High Speed Measurement of a Three Dimensional Shape by Using a Non-contact Sensor for Detecting an Inclination Angle and a Gap Distance (1st Report)

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Other Title
  • 非接触型傾き・距離検出センサによる三次元形状の自律高速測定に関する研究(第1報)
  • 非接触型傾き・距離検出センサによる3次元形状の自律高速測定に関する研究-1-マルチビーム投光型傾き・距離同時連続検出センサ用エレメントの設計
  • ヒ セッショクガタ カタムキ キョリ ケンシュツ センサ ニ ヨル 3ジゲン
  • Design of an element for the Sensor with Multi-beam Projection
  • マルチビーム投光型傾き・距離同時連続検出センサ用エレメントの設計

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The study is on autonomic high speed measurement of a three dimensional shape by using a non-contact sensor which can continuously and simultaneously detect the normal direction and the position of a measured point. This paper describes the system architecture and a design of the sensor. In order to design the sensor, the principle for detecting a normal direction and a position by reflected light of a beam projected on a measured point is clarified. According to the principle, a structure of the sensor element which has an emitting optical fiber with a graded-index lens and eight receiving optical fibers is determined. Also, computer simulations are performed to make the performance of the sensor element clear. In the simulations, a model-equation which expresses ray-intensity of the projected beam is derived, and reflected light of the beam is modeled by a diffuse component and a specular component. From the simulation-results, it became clear that the sensor element can detect a normal direction in the range from -45.0° to 45.0° and detect a position in the range from 2.7 mm to 6.0 mm for a diffuse surface. For a specular surface, the range of a detected normal direction is restricted from -7.5° to 7.5°.

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