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超长桁架变形的多点实时测量方法研究

易力1；陶卫1；高文俊1；赵辉1   

  1. 1、上海交通大学电子信息与电气工程学院仪器系，上海 200240
  • 出版日期:2016-08-15 发布日期:2016-08-15
  • 作者简介:易力（1991-），女，硕士研究生，主要研究方向：光电检测技术、位移传感器等。

Research on the Multipoint Real-time Measurement of Large Truss

YI Li1；TAO Wei1；GAO Wen-jun1；ZHAO Hui1   

  1. 1、Dept. of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240
  • Online:2016-08-15 Published:2016-08-15

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摘要： 超长可伸展桁架结构广泛应用于各领域，对其变形测量有着重要意义，比较国内外现有的几种常见的超长可伸展桁架结构变形测量方法，指出现有方法的缺点和局限性。提出一种新的基于激光准直的无导轨超长桁架结构变形测量方法，以激光准直光束为测量基准，利用递进分光的方式，实现桁架结构的多点实时测量。分析方法原理后设计实验系统，完成初步测试，实验结果表明基于该方法的测量系统能测量桁架结构二维变形，且稳定性好，重复性误差小于1.1%，非线性误差小于0.6%。该方法无需采用移动的方式或利用导轨即可完成多点实时测量，环境适用性大大提高，还具有测量精度高、测量距离远、可拓展性好等优点，具有很好的发展前景。

关键词: 超长桁架, 变形测量, 分光, 激光准直

Abstract: Large deployable truss is widely applied in various fields. It is important to measure the large deployable truss. The current measurement methods were compared and their disadvantages were pointed out. A new large deployable distortion measurement method   based on laser collimation was proposed. The new method carries out multipoint real-time measurement based on collimated laser beam split. By analyzing its principal, an experiment system is designed. The results show the measurement system can measure twodimensional deformation of large deployable truss with good stability.The repeatability error is within 1.1% and the nonlinear error is within 0.6%. The new method can carry out multipoint real-time measurement without guide rail or moving device. With good environmental applicability, high measurement precision and good expansibility, the new measurement method has great prospect.

Key words: Large truss, Deformation measurement, Beam split, Laser beam collimation

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