CAJ | 학술논문

设计了一种圆管类工件直线度激光测量系统,提出了一整套关于圆管类工件定心、内径获取和直线度计算的方法。研制了高精度的自动定心机构,采用双锥体同轴定心法实现测量系统在圆管类工件内的高精度自动定心。通过位置敏感探测器( PSD)和准直激光获得圆管各截面中心坐标,结合旋转扫描机构获得圆管内径测量值,并采用最小二乘椭圆拟合算法进行定心误差修正,最后进行数据处理,计算出工件直线度。实验结果表明,该系统定心准确度可达20μm,内径测量准确度可达5μm,测量重复性稳定在7μm以内,直线度测量准确度在40μm以内。
설계료일충원관류공건직선도격광측량계통,제출료일정투관우원관류공건정심、내경획취화직선도계산적방법。연제료고정도적자동정심궤구,채용쌍추체동축정심법실현측량계통재원관류공건내적고정도자동정심。통과위치민감탐측기( PSD)화준직격광획득원관각절면중심좌표,결합선전소묘궤구획득원관내경측량치,병채용최소이승타원의합산법진행정심오차수정,최후진행수거처리,계산출공건직선도。실험결과표명,해계통정심준학도가체20μm,내경측량준학도가체5μm,측량중복성은정재7μm이내,직선도측량준학도재40μm이내。
A laser based straightness measurement system for tube type workpieces is designed in this paper. The technologies about centering, diameter acquiring and straightness computing are also developed. The self-centering sub-system uses a double cone coaxial centering method to achieve high-precision centering. Center coordinates are obtained by PSD and collimated laser. A rotation scanning sub-system is used to obtain the tube type workpiece’s inner radius and angle measurements which are used to rectify the centering error by applying least squares circle fitting algorithm. The straightness of the tube type workpiece to be measured is finally calculated by using the above data obtained. Experimental results show that the system centering accuracy is up to 20μm, radial measurement accuracy up to 5μm, measurement repeatability up to 7μm, and straightness measurement ac-curacy less than 40μm.