CAJ | 학술논문

方位轴系编码器的定向误差作为光电经纬仪的系统误差,是可以在测量前就测试出来并加以修正.但是属系统误差的定向误差在工作过程中经常发生随机变化,必然会对测量精度造成很大的影响.文中分析认为调平机构与基座连接时的连接杆与连接孔之间的间隙,是该误差发生变化的;在分析了早期的解决方案的基础上,提出了调平机构与抗扭薄膜组合的机械结构模式,并计算了在调平机构±7'的角度范围内,抗扭薄膜的弯曲应力、剪切应力均能够满足许用应力,抗扭薄膜内外之间的转角小编码器1义的精度,这样既解决了方位轴线角度调整的问题,也保证了在4000 N·m的力矩作用下,定向误差没有发生变化.实践证明,该方法对解决定向误差的变化是行之有效的.
방위축계편마기적정향오차작위광전경위의적계통오차,시가이재측량전취측시출래병가이수정.단시속계통오차적정향오차재공작과정중경상발생수궤변화,필연회대측량정도조성흔대적영향.문중분석인위조평궤구여기좌련접시적련접간여련접공지간적간극,시해오차발생변화적;재분석료조기적해결방안적기출상,제출료조평궤구여항뉴박막조합적궤계결구모식,병계산료재조평궤구±7'적각도범위내,항뉴박막적만곡응력、전절응력균능구만족허용응력,항뉴박막내외지간적전각소편마기1의적정도,저양기해결료방위축선각도조정적문제,야보증료재4000 N·m적력구작용하,정향오차몰유발생변화.실천증명,해방법대해결정향오차적변화시행지유효적.
As the systematic error of the optoelectronic theodolite, the orientation error of the azimuth shafting encoder can be numbered and corrected before measuring. But the orientation error, as the systematic error, can constantly vary randomly in the course of work and inevitably make great influence on the measuring accuracy. It is believed that the gap between the joint lever and the switch port, when the leveling gear and the foundation bed are attached to each other, is the cause of error varying. On the basis of analyzing the previous solutions, the mechanical construction model combining the leveling gear and anti-twisting thin film was proposed, and it was found out that within the range of angle ±7', both the bending stress and shearing stress of anti-twisting thin film were admissible stresses between the internal circle and the external circle of the anti-twisting thin film. The corner was smaller than 1" of the encoder in precision. Thus the problem of azimuth axis angular adjustment was solved and it was assured that no orientation error occurs when it is under the moment of 4 000 N?m. Practice has shown that the approach is effective in solving the orientation error varying.