影像测量仪自动定位方法研究

影像测量仪在工业测量等领域中,尤其是精密平面类零件的高精度测量方面具有广泛的应用。当测量满台零件时,传统影像测量仪需人工手动控制平台移动达到测量位置,导致测量时间延长、效率低。以通用的影像测量仪为实验平台,采用双目视觉系统进行测量,通过大视野相机将特征物从平台任意位置移动到小视野相机视野范围内,并利用小视野进行位置矫正,以达到精确定位。实验结果表明,该方法能有效地将大视野范围内任一特征点精确移动到小视野图像中心。最后,提出一种影像测量仪薄板类零件自动定位方法,实验证明该方法能有效降低测量时长,特征点粗定位误差在±0.05mm以内。

Research on automatic positioning method of image measuring instrument

Image measuring instrument has been widely used in the field of industrial measurement, especially in the measurement of precision planar parts. When measuring a full set of parts, the traditional image measuring instrument needs to manually control the platform movement to reach the measuring position, which leads to prolonged measurement time and low efficiency. In this paper, a universal image measurement instrument is used as the experimental platform. The feature is moved from any position of the platform to a small field of vision through a large field of vision in the way of continuous use of the camera of large and small field of vision, which is corrected by using the small field of vision to achieve precise positioning and optimize the measurement time. The experimental results show that this method can effectively move any feature point within the range of large field of vision to the center of small field of image. Finally, an automatic positioning method for thin sheet parts of the image measuring instrument is proposed. The experiment proves that this method can effectively reduce the measurement time and the movement error of feature points is within 0.05mm.