Zhejiang Provincial Key Laboratory of Quantum Precision Measurement, College of Science, Zhejiang University of Technology, Hangzhou 310023, China.
Institute for Frontiers and interdisciplinary Sciences, Zhejiang University of Technology, Hangzhou 310023, China.
Sensors (Basel). 2023 Jan 12;23(2):881. doi: 10.3390/s23020881.
Shipborne atomic gravimeter (SAG) is an instrument that can directly measure absolute gravity in dynamic environments. As a new type of gravity sensor, a standard method for evaluating its detailed performance has not been proposed and the detailed performance of SAG was rarely reported. In this paper, a system of dynamic gravity measurement, which was integrated with a home-made atomic gravimeter, is demonstrated, and a novel and simple method for testing the performance of SAG on the lake based on the modulated Coriolis effect is put forward. Firstly, in the state of ship mooring, a tilt modulation of the gravity sensor has been realized to make sure the Raman wave vector is parallel to the gravity axis. Moreover, a comparison between the measurement result of CG-5 and SAG has also been carried out to evaluate the accuracy of the SAG. Then, the Coriolis effect modulating experiment is carried out with various routes on lake to test its performance in dynamic environments. In the ship mooring state, the accuracy has been demonstrated to be 0.643 mGal. The internal consistency reliabilities are evaluated to be 0.8 mGal and 1.2 mGal under the conditions of straight line and circle navigation, respectively.
船载原子重力仪（SAG）是一种可以在动态环境中直接测量绝对重力的仪器。作为一种新型的重力传感器，尚未提出评估其详细性能的标准方法，并且很少有关于 SAG 详细性能的报道。在本文中，演示了一种与自制原子重力仪集成的动态重力测量系统，并提出了一种基于调制科里奥利效应在湖上测试 SAG 性能的新颖而简单的方法。首先，在船舶停泊状态下，实现了重力传感器的倾斜调制，以确保拉曼波矢量与重力轴平行。此外，还对 CG-5 和 SAG 的测量结果进行了比较，以评估 SAG 的精度。然后，在湖上进行了各种路线的科里奥利效应调制实验，以测试其在动态环境中的性能。在船舶停泊状态下，已证明其精度为 0.643 mGal。在直线和圆形导航条件下，内部一致性可靠性分别评估为 0.8 mGal 和 1.2 mGal。
