叶梅, 王浩. 大型建筑物双向位移测量方法[J]. 应用光学, 2008, 29(5): 745-749.
引用本文: 叶梅, 王浩. 大型建筑物双向位移测量方法[J]. 应用光学, 2008, 29(5): 745-749.
YE Mei, WANG Hao. Bidirectional displacement measurement of large buildings[J]. Journal of Applied Optics, 2008, 29(5): 745-749.
Citation: YE Mei, WANG Hao. Bidirectional displacement measurement of large buildings[J]. Journal of Applied Optics, 2008, 29(5): 745-749.

大型建筑物双向位移测量方法

Bidirectional displacement measurement of large buildings

  • 摘要: 为了同时对大坝等大型建筑物被测点水平和垂直方向的移位进行监测,提出一种基于几何投影关系的光电检测方法。该方法以透明模板为基底,将计量光栅制作在模板上,模板固定在被测结构上。利用自聚焦准直镜的出射光束反映基准线与模板的相对空间关系。接收镜将载有模板模式信息的返回光束经光缆传输到监测中心,经光电变换、模数转换和信号分析解出被测点的水平和垂直位移量。实验表明:水平位移检测精度可达0.005mm,垂直位移检测精度可达0.1mm。检测点处的传感器无任何电子学元件,对被测点部位恶劣环境有很好的适应能力和抗干扰能力。

     

    Abstract: A novel optoelectronic detecting method based on projective geometry is proposed to monitor the horizontal and vertical displacement of measured points of a structure such as dam and huge straight building. In the method, a transparent mask is taken as a substrate, a measurement grating is made on the substrate and the mask is fixed on the measured structure. The relative space relationship of the datum line and mask is represented by the beam from GRIN lens. The return beam with mask mode information is transferred by the receiving lens to the monitoring centre through a cable. The horizontal and vertical displacement of measured points of the structure is obtained with optoelectronic transform, A/D and signal analysis. Experiments show that the measurement accuracy of horizontal and vertical displacements can reach 0.005mm and 0.1mm respectively. The sensors at measured spots do not have any electronic element and they have good adaptability and anti-interference performance in the harsh environment.

     

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