温控器陶瓷壳内槽深度在线测量方法研究

Research on On-Line Measurement Method of Inner Slot Depth of Ceramic Case of Temperature Control Relay

温控器陶瓷壳内槽中具有高度不同的平面,且都有安装孔,导致其内槽深度在线测量难;针对底部有两层平面的温控器陶瓷壳,研究了一种基于零件角度预识别的多角度激光自适应测量内槽深度的方法;采用多激光环形光路结构,在环形支架上等距离安装8个独立可控的一字激光器;先通过拍照实时检测零件正放的旋转角度;然后自动查找合适方向的激光器并开启,使其在内槽的各平面上形成相互平行的分段光斑;再利用激光三角法将光斑之间的距离值转换为内槽的深度值;该方法可以根据零件的摆放,自动选择合适角度的照射激光,无需人工摆放零件,可自动避开干扰激光成像的区域;实验结果表明,该方法测量结果准确可靠,测量误差小于0.01 mm。

There are planes with different heights in the inner groove of the ceramic shell of the temperature control relay,and they all have mounting holes.This article is aimed at the ceramic shell of the temperature control relay with two planes at the bottom,A method of multi-angle laser adaptive measurement of inner groove depth based on part angle pre-recognition was studied.The method uses a multi-laser ring optical path structure,eight independently controllable line lasers are equidistantly mounted on the ring support.First detect the rotation angle of the part in real time by taking a picture.Then automatically find the laser in the right direction and turn it on,it forms parallel segmented facula on each plane of the inner groove.Then the distance between facula is transformed into the depth of inner groove by laser triangulation.This method can automatically select a suitable angle of laser irradiation according to the placement of parts.Therefore,there is no need to manually place parts,and the area that interferes with laser imaging can be automatically avoided.The experimental results show that the measurement results of this method are accurate and reliable,and the measurement error is less than 0.01 mm.