测段数量对相对重力仪性能试验的影响分析
康胜军1,何志堂1,赵丕1,汪健2,史志刚1

(1.自然资源部第一大地测量队,陕西 西安 710054; 2.中国地震局地震研究所地震大地测量重点实验室,湖北 武汉 430071)

相对重力仪; 性能试验; 动态精度; 一致性中误差; 测段数量

Analysis of the Influence of the Number of Gravimetric Sections on the Performance Test of the Relative Gravimeter
KANG Shengjun1,HE Zhitang1,ZHAO Pi1,WANG Jian2,SHI Zhigang1

(1.The First Geodetic Surveying Brigade of Ministry of Natural Resources,Xi'an 710054,Shaanxi,China)(2.Key Laboratory of Earthquake Geodesy,Institute of Seismology,China EarthquakeAdministration,Wuhan 430071,Hubei,China)

relative gravimeter; performance test; dynamic accuracy; the mean square error of the consistency; the number of gravimetric sections

DOI: 10.20015/j.cnki.ISSN1000-0666.2025.0071

备注

为了分析测段数量对相对重力仪性能试验的影响,对2021—2024年4台CG-6型和4台BURRIS型相对重力仪的性能试验数据进行处理,选取2～9段段差计算动态精度和3种仪器组合数的一致性中误差。发现CG-6型、BURRIS型相对重力仪动态精度的均值分别为(1～3)×10-8 m/s2、(4～16)×10-8 m/s2; 3台仪器组合较6台仪器组合的一致性中误差更容易满足限差。剔除读数异常的仪器干扰后进一步分析发现,测段数量与相对重力仪的性能试验结果密切相关。随着测段数量的增加,动态精度和一致性中误差结果会逐渐趋于稳定; 当测段数量为5～7段时,各台仪器的动态精度和多台仪器一致性中误差达到峰值,之后逐渐减小或保持稳定。
In order to analyze the influence of the number of gravimetric sections on the performance test of the relative gravimeter,the performance test data of four CG-6 and four BURRIS relative gravimeters for four consecutive years were processed,and the difference between 2 to 9 sections was selected to calculate dynamic accuracy and the mean square error of the consistency of multiple instruments of the three instrument combinations.It was found that the dynamic accuracy of CG-6 relative gravimeter changed in the range of 1×10-8 m/s2 to 3×10-8 m/s2,and the dynamic accuracy of BURRIS relative gravimeter was in the range of 4×10-8 m/s2 to 16×10-8 m/s2.The mean square error of the consistency of three instruments is more likely to accord with the limit compared to a combination of six instruments.The results of further analysis show that the number of gravimetric sections is closely related to the performance test results of the relative gravimeter after removing the abnormal instrument interference.With the increase of the number of gravimetric sections,the dynamic accuracy and the mean square error of the consistency of multiple instruments will gradually become stable.When the number of gravimetric sections is 5 to 7,the dynamic accuracy and the mean square error of the consistency of multiple instruments reaches the peak,and then the value gradually decreases or remains stable.
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