条码遮挡对 DiNi12数字水准仪测量结果影响的研究

摘要

In the harsh environment ,the measured results of digital level will inevitably be affected by adverse conditions .It often happens that raindrops ,oil or dust adhere the barcode .The national and international research results give qualitative conclusions which damaged lines of barcode effect on the digital level measurements .Although these conclusions are widely accepted in surveying field ,it is necessary that some of the conclusions are exactly examined again .Based on the digital level DiNi12 measurement principle , this paper tests DiNi12 with damaged lines of barcode in different sight distances . The experimental results show that DiNi12 will offer chaotic measuring results in the sight distance 1 .8 m .The experimental results are useful for bettering surveying specifications .%数字水准仪作为一种在恶劣环境下使用的测量仪器，必然会受到不利条件的影响。雨滴、油污及尘土等污染条码遮挡是经常发生的事情。国内外已有诸多文献研究过条码污染遮挡对数字水准仪测量结果的影响，但这些文献仅仅是从定性、粗略的角度进行了概略研究，得出了粗浅结果。虽然这些结论在学界广为传播，但这些结论是值得斟酌的。依据DiNi12数字水准仪的测量原理，对条码尺上不同宽度的条码进行遮挡后进行实际测量，实验结果表明：在短视距时，条码尺的遮挡会导致DiNi12乱数的情况。本实验结果可以为相关测量规范的修订提供理论与实践支撑。