在弹药制造过程中,药柱外型尺寸将直接影响弹药的性能。针对人工检测效率低且重复性不好以及传统机器视觉普适性差的特点,提出了基于傅里叶变换轮廓术的检测方法。该方法采用面阵CCD相机采集受药柱表面调制的光栅云纹图像,再对图像进行矫正、相位提取及重建,最后通过尺寸标定得到药柱三维尺寸。实验结果表明,该方法能同时检测多个药柱的尺寸,极大地提高了检测效率,能检测出药柱的微小变形,检测误差在0.2%以内。

During ammunition manufacturing process, the size of solid propellant grain has a direct impact on the performance of the ammunition. Because of artificial detection has low-efficiency and bad-repeatability, traditional machine vision detection can only detect the surface size of the solid propellant grain, therefore, the detection method of the Fourier transform profilometry is proposed. This method gets the fringe image by using matrix CCD, and the image process contains the fringe correction, phase extraction and phase reconstruction, finally gets the 3D size of the solid propellant grain by calibration. The results show that this method has good real-time performance, greatly improves the detection efficiency, convenient for testing tiny deformation, and the detection error is within 0.2%.