摘要
激光干涉绝对重力仪作为高精度绝对重力测量中的典型测量仪器,单次测量的常规流程一般是电机驱动、数据采集、重力加速度绝对值计算和结果的显示与存储。这种顺序控制过程中,存在耗时长、结果输出时间误差较大的问题。本文创新性地提出一种时间优化方法,通过建立数据采集前电机驱动与采集后数据处理两个过程时间复用机制的时间优化模型,对顺序控制方式中的各步骤进行优化与重新配置,实现缩短常规测量的测量时长,减少结果输出时间误差的目的。实测结果表明,时间优化方法将单次测量时间从原来的34.3±0.3 s,精确控制为22 s,误差5 ms,大幅提高测量效率的同时实现了单次测量时间的精准控制,也增加了与同类观测数据的融合分析的可行性。
Laser interferometer is a typical measuring instrument in high-precision absolute gravity measurement.During the conventional process of single measurement,it generally involves motor drive,data acquisition,gravity acceleration absolute value calculation,and measurement results display and storage.During the process of sequential control,it requires a lot of time and a large output time error.In this study,an innovative time-optimization method is proposed.A time optimization model of the two-process time-reuse mechanisms of motor drive and post-acquisition data processing before data acquisition is formulated.The steps in the sequential control mode are optimized and reconfigured to achieve the goal of reduce the measurement time of conventional measurements and the error of result output time.The practical measurement results show that the time optimization method could reduce the time from the original 34.3 s±0.3 s to be the precise 22 s,and the error is 5 milliseconds.The measurement efficiency is greatly improved.Meanwhile,the precise control of a single measurement time is achieved.However,it increases the feasibility of fusion analysis with similar observation data.
作者
张旸
吴琼
滕云田
黄家亮
Zhang Yang;Wu Qiong;Teng Yuntian;Huang Jialiang(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2021年第8期130-136,共7页
Chinese Journal of Scientific Instrument
基金
科技部重点研发计划专项(2018YFC1503801)
中国地震局地球物理研究所基本科研业务费专项(DQJB19B23)资助。
关键词
激光干涉
绝对重力测量
时间优化
laser interference
absolute gravimetry
time optimization
