Zhu Z.-H.,The Dalian Military Representative Office of China PLA Air Force |
Zhang R.,Jinxi Research Institute of Chemical Industry |
Wang D.-Y.,Jinxi Research Institute of Chemical Industry |
Zhang H.-Y.,The Dalian Military Representative Office of China PLA Air Force
Cailiao Gongcheng/Journal of Materials Engineering | Year: 2012
When the optical distortion vanishing angles of aircraft acrylic sheets were measured by the point source vanishing method according to the present stipulation operating procedures, the optical distortions in the further distance from the central axis line of aircraft acrylic sheet were measured in the positions that were both close to and away from the stripe curtain. As a result, the acquired measure data are quite different and it has seriously effect on the inspectors to judge whether the measure sheet is qualified or not. In fact, the phenomenon is in connection with such factors as the defect distance from the central axis of the sheet and the defect cross section shape. A solution method is found out that a horizontal sliding device is installed on the existing rotation measure rack. Thus, the measure sheet can be horizontally slid close to the rotation axis of the rack and rotated, then the vanishing angles in the different positions are got respectively and the maximum angle value is taken as the measurement result.