【摘要】 针对专用密封圈及其模具型腔参数进行高效检测的问题,对密封圈及其模具特征、检测干扰因素、误差计算模型方面进行了研究,对密封圈及模具检测的原理与组成进行了归纳,在建立检测系统的结构与控制模型基础上,提出了一种基于激光二维扫描传感器的检测系统,通过多截面多角度扫描轮廓离散点数据并进行了曲线拟合,以判断对象的特征参数是否符合要求。该检测系统由自行设计的四维精密运动平台与高精度三爪卡盘式运动转台组成工件承载定位平台,利用激光二维扫描传感器和NI6229型数据采集卡形成了数据采集通道,并分析了该系统测量坐标系的建立和实现方法,提出了基于最小二乘原理的曲线拟合和特征提取算法。研究结果表明:该检测系统不确定度达到9.84μm,能够有效解决对密封圈及其模具进行高效非接触式检测的问题,提高密封圈制造质量。更多还原

【Abstract】 Aiming at the problems of efficient detection of the special sealing ring and the mold cavity parameters,the features of the special sealing ring and the mold,interference factor,error calculation models were researched,the principle and constitution of detection system were summarized,a new detection system based on laser scanning sensor was proposed. The characteristic parameters of the object can be judged by multi section and multi angle scanning the contour of discrete point data and curve fitting. In the detection system,the four-dimensional precision motion platform and high precision three jaw chuck movement table which form the artifact bearing positioning platform was designed. Then,data acquisition channel was formed by using laser two-dimensional scanning sensor and NI6229 data collection,the establishment and the realization method of the measuring coordinate of the system was analyzed. Finally,the curve fitting and feature extraction algorithm based on the principle of least squares was proposed. The results indicate that the uncertainty of this system can reach 9. 84 μm,and it can effectively solve the problem of the sealing ring and the mold for efficient non-contact detection,so as to improve the quality of sealing ring.更多还原