一种高铁测绘仪器基座外业检校实用方法

A Practical Method for Field Verification of the High-speed Railway Surveying Instrument Tribrach

测绘仪器性能优劣直接影响测绘产品的成果质量,国家技术监督局颁布多项检定标准以规范测绘仪器使用。但在工程实际应用中,基座检校往往被忽视,导致部分项目成果系统误差偏大。为了减少系统误差,通过工程实例,制定详细的测绘基座外业检校流程,结合测绘仪器基座本身的水平及垂直结构特点,提出了一种便捷实施的基座外业检校实用方法,可大幅提高工程建设中精密测量成果的可靠性和稳定性。研究结果表明:对于需要定期维护的高铁精密测量控制网,采用本方法可加强控制网重复测量成果的收敛性,从改善仪器机械结构自身精密性入手,提高测量成果的精度。

The performance of surveying and mapping instruments directly affects the quality of surveying and mapping products.The State Bureau of Quality and Technical Supervision has promulgated a number of codes and standards to standardize the use of surveying instrument.Generally,the tribrach calibration was neglected in practical engineering applications,which led to large systematic errors of some project results.In order to reduce systematic errors,a detailed field calibration process of surveying instrument tribrach was formulated through engineering examples.Combined with the horizontal and vertical structure characteristics of surveying instrument tribrach,a convenient and practical method for field correction of tribrach was proposed,which could greatly improve the reliability and stability of precision measurement results in engineering construction.The result shows that:For the high-speed railway precision control network which is retested regularly,by using this method,the convergence of repeated measurement results of control network can be strengthened,and the precision of measurement results can be improved by improving the precision of instrument mechanical structure.