CAJ | 학술논문

在三角法位移测量中散斑是一种噪声，当成像光斑过弱而湮没于散斑中时，抑制散斑已没有意义；但散斑同样是位移信息的载体。为此针对激光三角法位移测量系统，研究数字散斑相关法；对强散射、粗糙界面的位移进行了实测，且进行了数据分析。结果表明，在激光三角法位移测量中运用数字散斑相关法对强散射、粗糙界面进行位移测量是可行的，测量范围可达微米级，测量误差小于2%。此法可改善三角法位移测量系统在强散射、粗糙界面的情形下传统测量方法的缺陷，有效提高了测量精度，并扩展了激光三角法位移测量的实用范围。
재삼각법위이측량중산반시일충조성，당성상광반과약이인몰우산반중시，억제산반이몰유의의；단산반동양시위이신식적재체。위차침대격광삼각법위이측량계통，연구수자산반상관법；대강산사、조조계면적위이진행료실측，차진행료수거분석。결과표명，재격광삼각법위이측량중운용수자산반상관법대강산사、조조계면진행위이측량시가행적，측량범위가체미미급，측량오차소우2%。차법가개선삼각법위이측량계통재강산사、조조계면적정형하전통측량방법적결함，유효제고료측량정도，병확전료격광삼각법위이측량적실용범위。
The laser speckle is a kind of noise in triangulation displacement measurement. It′ s meaningless to restrain speckles when the light spot is so weak that facular image can not be extracted from speckles. But the speckle is also a kind of carrier of displacement information. For the above reasons, digital correlation method was used in laser triangulation displacement measurement system to measure the displacement of rough surface with strong scattering and the results had been analyzed. The results show that the digital correlation method is feasible in triangulation displacement measurement system, the measuring range reached micron grade and the experimental errors are below 2%. This method can overcome the disadvantage of laser triangular displacement measurement system in rough surface with strong scattering, improve the accuracy and expand its range of application.