基于高稳定可调谐测尺的相位式激光测距方法与相关技术基础研究

项目名称： 基于高稳定可调谐测尺的相位式激光测距方法与相关技术基础研究

项目编号： No.51205091

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 机械工程学科

项目作者： 杨宏兴

作者单位： 哈尔滨工业大学

项目金额： 25万元

中文摘要： 未来大科学装置和大型装备制造业将在测量精度方面提出更高的测量需求，本课题针对这一问题，首先，研究一种基于同步测尺微调的整数相位解误差规避方法，揭示整数相位解误差发生机理，通过建立新的整、小数相位结合原则与误差规避测尺求解模型破坏误差形成条件，从原理上消除该误差的产生；其次，探索一种高稳定性同步可调谐测尺产生与调谐方法，建立多频率混频外差式同步测尺的稳定度影响模型，可将测尺的多元化频率稳定影响因素变为单一声光移频时钟频率源影响因素，为设计与集成高稳定性测尺产生装置提供理论基础；再次，研究一种电信号相位延迟漂移抑制方法，通过建立电信号相位延迟漂移模型，揭示环境参数对相位延迟漂移的影响机理，完善低漂移、高精度相差测量理论。最后，有机融合上述方法，形成几米到几百米测量范围、微米级测量精度的新激光测距方法与装置。本项目的研究在未来大科学装置、大型航空航天装备制造等前沿领域中具有潜在的广泛应用前景。

中文关键词： 绝对距离测量；多波长测距；整数相位解；相位延迟漂移；同步测尺

英文摘要： A higher measurement accuracy will be urgent needed to catch up with the future development of large scientific facilities and equipment manufacturing industry, in order to sovle this problem, limiting factors of the measurement precision are deeply analyzed in this project, and then some methods are proposed. First, a method which eliminates integer phase error in phase shift laser range finding based on turning simultaneous measuring wavelength is proposed,in this method, the generation principle of the intger phase error is revealed, and a new combined principle of intege and fractional phase and suitable refined measurement wavelength that keep phase value out of error range is generated, so the integer phase error can be prevent the from occurring. Second, a method based on multi-frequency heterodyne mixing is proposed to get high stable measuring wavelength, in this method, satability model of synchronization wavelength generated by heterodyne frequencies between different multi-frequency is established and then higher stability wavelength is achieved by chaging the influencing factors of the frequency stability from diversification to single factor that clock frequency source influencing factor.Third, a suppression method for phase delay drifts is proposed. In this method, the signal phase delay drift mod

英文关键词： Absolute distance measurement；multi-wavelength measurement；integer phase error；phase delay drift；synchronization wavelength