全站仪目标棱镜偏心差及其影响

Centeringerror of Total Station Target Prism and Effecd

高精度全站仪用于变形监测已日益普遍,同时对其配套的目标棱镜也提出了更高的要求,要保证全站仪在变形监测中达到预期目标,必须分析检验目标棱镜存在的误差及其对观测值的影响。通过对现场观测方法采取一定的措施消除或削弱其影响,或采用一种新型、高效、可靠、简便、经济的全站仪目标配套设施,高效地提高变形监测精度和监测资料的可靠性。工程实践证明,全站仪目标棱镜偏心差明显降低了变形监测的精度和可靠性,完全可以采取有效措施加以解决。

Precise Total station is used for deformation monitoring increasingly common and it requests the target prism has higher standards.To ensure the whole Total station reaches the expectation while the deformation monitoring,it is necessary to analyze the target prism error and its influence on the result.It can improve the monitoring precision and the datum reliability through some certain measure at the site to weaken the influence or adopting a kind of new target kit of Total station which is efficient,credible,simple,economy.The engineering practice proves that the precision and reliability severely reduced by the centeringerror of target prism in total station obviously can be eliminated effective.