| 双弦法测量孔径的研究 |
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| 引用本文： | 刘海宁,李真.双弦法测量孔径的研究[J].宇航计测技术,1998,18(6):18-22. |
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| 作者姓名： | 刘海宁 李真 |
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| 作者单位： | 天津大学精仪学院 |
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| 摘 要： | 讨论了一种新型的孔径测量方法双弦法，建立了测量模型，指出传统的转折点法、对称点法是其特例。若ｌ１，ｌ２分布在孔两侧，合理选择Ｈ／Ｄ，可以减小扫描误差的影响。最后讨论了利用双弦法对工件进行Ｚ向微米级定位。根据此原理，很容易实现精密孔径测量仪器的智能化、高准确度和高效率。
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| 关 键 词： | 孔测量 双弦法 数学模型 |
Study of hole diameter measurement by two strings method |
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| Liu Haining\ Li Zhen\ Zhang Guoxiong.Study of hole diameter measurement by two strings method[J].Journal of Astronautic Metrology and Measurement,1998,18(6):18-22. |
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| Authors: | Liu Haining\ Li Zhen\ Zhang Guoxiong |
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| Institution: | Liu Haining\ Li Zhen\ Zhang Guoxiong |
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| Abstract: | A new method of hole diameter measurement by two strings, which can include the traditional turning point method and symmetry points method, is discussed by modelling. The measurement error of this method is larger than one of symmetry points measurement and smaller than one of turning point measurement when l 1 and l 2 are located at two sides of the maximum diameter line. The scanning error can also be neglected when H/D is from 0.025 to 0.05. |
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| Keywords: | Hole measurement\ Two strings method\ Mathematical model |
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