Development and practice of CHZ-Ⅱ marine gravimeter

doi:10.11947/j.AGCS.2024.20220580

Abstract

Abstract:

Marine gravimeter is an important instrument to obtain high-precision and high-resolution marine gravity field, which is mainly used in resource exploration, geoid refinement, marine science research and gravity assisted inertial navigation. The existing marine gravimeters in China mainly rely on foreign imports, which not only have high prices, but also have many inconveniences in the introduction and maintenance of the instruments. With the support of the major scientific instrument projects of the Ministry of Science and Technology, the CHZ-Ⅱ spring type marine gravimeter with completely independent intellectual property rights has been successfully developed based on the CHZ marine gravimeter. The new gravimeter uses metal zero length spring as the measuring element, and its unique axisymmetric vertical suspension structure can overcome the cross coupling effect. The application of high-precision servo control technology and strong damping can overcome the influence of carrier disturbance and ensure that the instrument maintains measurement accuracy under different sea conditions. High precision constant temperature technology and temperature compensation technology can eliminate the influence of ambient temperature fluctuation on the measuring accuracy of the instrument. This paper introduces the working principle, system structure, features and test results of the instrument. The static test shows that its monthly drift is better than 3 mGal; the wharf mooring test shows that its dynamic accuracy reaches 0.2 mGal, which can clearly reflect the gravity variation characteristics of sea tide; the ship borne test with a total voyage of more than 50 000 nautical miles shows that the comprehensive measurement accuracy is better than 1 mGal. To sum up, the accuracy and stability of the instrument have reached the level of the same kind of instruments at home and abroad, which can replace the current imported marine gravimeter.

Key words: CHZ-Ⅱ marine gravimeter, zero-length spring, silicone oil damping, high-precision constant temperature techno-logy, gyro stabilized platform, marine gravimetry

CLC Number:

P229

Lintao LIU, Jiangang HE, Jiangning XU, Leijun LIU, Jinyao GAO, Zhongmiao SUN, Taiqi WU, Xinghui LIANG, Ming HU, Junjian LANG, Hongyang HE. Development and practice of CHZ-Ⅱ marine gravimeter[J]. Acta Geodaetica et Cartographica Sinica, 2024, 53(4): 620-628.

Figures/Tables 15

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Tab. 1

Fig. 9

Fig. 10

Tab. 2

Fig. 11

Fig. 12

Tab. 3

References 26

[1]	LACOSTE L J B. Measurement of gravity at sea and in the air[J]. Reviews of Geophysics, 1967, 5(4):477-526.
[2]	DEHLINGER P. Marine gravity[M]. New York: Elservier Scientific Publishing Company, 1978.
[3]	TORGE W. Gravimetry[M]. Berlin: Walter de Gruyter, 1989.
[4]	黄谟涛, 翟国君, 管铮, 等.海洋重力场测定及其应用[M]. 北京: 测绘出版社, 2005.
	HUANG Motao, ZHAI Guojun, GUAN Zheng, et al. Determination and application of marine gravity field [M].Beijing: Surveying and Mapping Press, 2005.
[5]	李建成, 陈俊勇, 宁津生, 等.地球重力场逼近理论与中国2000似大地水准面的确定[M].武汉: 武汉大学出版社, 2003.
	LI Jiancheng, CHEN Junyong, NING Jinsheng, et al. Theory of the Earth's gravity field approximation and determination of China Quasi-geoid 2000[M]. Wuhan: Wuhan University Press, 2003.
[6]	孙中苗.航空重力测量理论、方法及应用研究[D].郑州: 信息工程大学, 2004.
	SUN Zhongmiao. Theory, methods and applications of airborne graivmetry [D]. Zhengzhou: Information Engineering University, 2004.
[7]	欧阳永忠.海空重力测量数据处理关键技术研究[D].武汉: 武汉大学, 2013.
	OUYANG Yongzhong. On key technologies of data processing for air-sea gravity surveys[D]. Wuhan: Wuhan University, 2013.
[8]	张善言, 李锡其, 梁础坚, 等. 新研制的CHZ海洋重力仪[J]. 测绘学报, 1987, 16(1):1-6.
	ZHANG Shanyan, LI Xiqi, LIANG Chujian, et al. Newly developed CHZ sea-gravimeter[J]. Acta Geodaetica et Cartographic Sinica, 1987, 16(1):1-6.
[9]	宗杰.CHZ重力仪在动态重力测量中的非线性问题[J].测绘学报, 1987, 16(1):7-15.
	ZONG Jie.Nonlinear problem of CHZ gravimeter in dynamic gravity measurement[J]. Acta Geodaetica et Cartographica Sinica, 1987, 16(1):7-15.
[10]	刘若曾.CHZ海洋重力仪的室内外及海上试验[J].测量与地球物理集刊, 1988(9):87-93.
	LIU Ruozeng. The test of CHZ sea gravimeter in laboratory and at sea[J].Acta Geodaetica et Geophysica, 1988(9):87-93.
[11]	张善言.CHZ海洋重力仪的若干特点[J].测量与地球物理集刊, 1991(12):93-102.
	ZHANG Shanyan. Several distinguishing features of the CHZ sea gravimeter[J].Acta Geodaetica et Geophysica, 1991(12):93-102.
[12]	刘敏, 黄谟涛, 欧阳永忠, 等. 海空重力测量及应用技术研究进展与展望（二）：传感器与测量规划设计技术[J]. 海洋测绘, 2017, 37(3):1-11.
	LIU Min, HUANG Motao, OUYANG Yongzhong, et al. Development and prospect of air-sea gravity survey and its applications, part Ⅱ: sensor, plan and design of survey[J]. Hydrographic Surveying and Charting, 2017, 37(3):1-11.
[13]	吴美平, 蔡劭琨, 于瑞航, 等. 捷联式重力测量技术研究进展[J]. 导航与控制, 2020, 19(S1):161-169.
	WU Meiping, CAI Shaokun, YU Ruihang, et al. Research progress on strapdown gravimetry technology[J]. Navigation and Control, 2020, 19(S1):161-169.
[14]	袁园, 高金耀, 高巍. 基于惯性稳定平台的ZL11-1A海洋重力仪性能评估[J]. 海洋测绘, 2021, 41(1):22-26.
	YUAN Yuan, GAO Jinyao, GAO Wei. A new shipborne gravimeter ZL11-1A based on inertial stabilization platform and its performance evaluation[J]. Hydrographic Surveying and Charting, 2021, 41(1):22-26.
[15]	修睿, 郭刚, 薛正兵, 等. 海空重力仪的技术现状及新应用[J]. 导航与控制, 2019, 18(1):35-43.
	XIU Rui, GUO Gang, XUE Zhengbing, et al. Technicalcurrent situation and new application of marine/aviation gravimeter[J]. Navigation and Control, 2019, 18(1):35-43.
[16]	胡平华, 黄鹤, 赵明, 等. GIPS-1AM高精度惯性稳定平台式海空重力仪的设计与试验[J]. 导航定位与授时, 2015, 2(3):16-22.
	HU Pinghua, HUANG He, ZHAO Ming, et al. Design and testing of GIPS-1AM Airborne/marine gravimeter based on high precision inertial stabilized platform[J]. Navigation Positioning and Timing, 2015, 2(3):16-22.
[17]	刘雷钧, 何建刚, 涂海波, 等. 载体垂向扰动对轴对称型金属弹簧海洋重力仪的影响[J]. 地球科学进展, 2021, 36(5):520-527.
	LIU Leijun, HE Jiangang, TU Haibo, et al. Influence of vertical disturbance from the carrier on axisymmetric metal spring marine gravimeter[J]. Advances in Earth Science, 2021, 36(5):520-527.
[18]	涂海波, 胡明, 董琴琴, 等. CHZ型重力仪重力测量伺服回路的分频段控制方案[J]. 导航与控制, 2015, 14(2):41-45.
	TU Haibo, HU Ming, DONG Qinqin, et al. Frequency-piecewise control scheme for the gravity measurement servo loop of the CHZ gravimeter[J]. Navigation and Control, 2015, 14(2):41-45.
[19]	梁础坚. CHZ海洋重力仪伺服系统[J]. 测量与地球物理集刊, 1988(9):95-105.
	LIANG Chujian. CHZ sea gravimeter servo system[J]. Acta Geodaetica et Geophysica, 1988(9):95-105.
[20]	宗杰. CHZ海洋重力仪的恒温与温补[J]. 测量与地球物理集刊, 1988(9):107-111.
	ZONG Jie. The constant temperature and temperature compensation of CHZ sea gravimeter[J]. Acta Geodaetica et Geophysica, 1988(9):107-111.
[21]	何泓洋.高精度光纤陀螺稳定平台控制系统研究[D].武汉: 海军工程大学, 2013.
	HE Hongyang. Research on control system of high precision fog stabilized platform [D]. Wuhan: Naval University of Engineering, 2013.
[22]	许江宁, 何泓洋, 吴苗, 等. 重力测量平台自主式姿态确定原理[M]. 北京: 科学出版社, 2021.
	XU Jiangning, HE Hongyang, WU Miao, et al. Principle of autonomous attitude determination of gravity measurement platform[M]. Beijing: Science Press, 2021.
[23]	中华人民共和国国家质量监督检疫总局. 海洋调查规范第8部分：海洋地质地球物理调查：GB/T 12763.8—2007[S]. 北京: 中国标准出版社, 2008.
	General Administation of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Specifications for oceanographic survey part 8: marine geology and geophysics survey: GB/T 12763.8—2007[S]. Beijing: Standards Press of China, 2008.
[24]	黄谟涛, 欧阳永忠, 翟国君, 等. 海面与航空重力测量重复测线精度评估公式注记[J]. 武汉大学学报（信息科学版）, 2013, 38(10):1175-1177.
	HUANG Motao, OUYANG Yongzhong, ZHAI Guojun, et al. Comment on the formulas of accuracy evaluation for multi-line overlapping measurements in ship-borne and airborne gravity survey[J]. Geomatics and Information Science of Wuhan University, 2013, 38(10):1175-1177.
[25]	TU Haibo, HE Jiangang, HU Ming, et al. Modeling of errors resulting from vehicle motions for CHZ-II mobile gravimeter and its performance verification during marine surveys[J]. Applied Geophysics, 2021, 20:592-599.
[26]	YUAN Yuan, GAO Jinyao, WU Zhaocai, et al. Performance estimate of some prototypes of inertial platform and strapdown marine gravimeters[J]. Earth, Planets and Space, 2020, 72(1):11091-11099.

载体	测量时间
向阳红10	2015-04-28—2015-05-05
浙嘉渔辅00001	2016-06-25—2016-06-28
邓稼先号	2016-08-22—2016-09-26
科学号	2017-04-02—2017-06-09
南测429	2018-05-05—2018-07-07
向阳红06	2018-05-28—2018-06-25
向阳红10	2018-09-29—2018-11-27
大洋号	2019-08-23—2020-11-02
嘉庚号	2022-04-09—2022-06-03

误差	最大值	最小值	平均值	中误差
平差前	1.31	－1.57	－0.34	0.68
平差后	0.13	－0.12	－0.00	0.07