与国外主流海洋重力仪相比,国产海洋重力仪的分辨率低一个数量级,这制约了国产海洋重力仪的应用.针对国产海洋重力仪亟需提高分辨技术的需求,根据ZSGA-2型重力敏感器的工作原理,建立了弹性系统的力学模型,并开展了样机的静态性能测试.测试结果表明,经零位漂移和大地固体潮汐修正后的静态精度达到了0.03mGal,样机随重力仪进行楼层高差测量的重复性为0.15mGal.该型重力敏感器的分辨率已经达到了国外同类产品的技术水平,并具备了一定的动态适应性,为该型高分辨率零长弹簧重力敏感器开展高动态环境适应性技术研究奠定了坚实基础.
Compared with the international mainstream marine gravimeter, the resolution of domestic marine gravime-ter is one order of magnitude lower, which directly restricts the application of domestic marine gravimeters. For improving the sensitivity of gravity sensor for domestic marine gravimeter, a mechanics model of elastic system for ZSGA-2 gravity sen-sor is established, and then the static performance test of its prototype is carried out. The test results show that the static accuracy is 0.03mGal after the corrections of solid tide and zero drift, and the test repeatability of height different between different floor is 0.15mGal. The sensitivity of ZSGA-2 gravity sensor is under the same level as foreign similar products, which can work in a certain dynamic condition. Furthermore, it lays a solid foundation for the research on the high dynamic environment adaptability of ZSGA-2 marine gravity sensor.