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| 海洋磁力仪的原理与技术指标对比分析 |
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裴彦良1,2, 梁瑞才1,2, 刘晨光1,2, 韩国忠1,2, 李正光1,2
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1.国家海洋局第一海洋研究所;2.海洋沉积与环境地质国家海洋局重点实验室
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| 摘要: |
| 针对现今世界市场上海洋磁力仪产品型号较多、技术指标复杂、应用范围不尽相同,产品的选用存在一定困难等问题,分别介绍了3种不同类型的磁力仪的工作原理,具体对比分析了各种磁力仪的技术指标,并简单介绍了磁力仪的应用及梯度仪组合方式。结果表明标准质子旋进式海洋磁力仪灵敏度较低,存在进向误差,但无死区,价格最为低廉,适合于对灵敏度要求不高的工程和科研地球物理调查。Overhauser海洋磁力仪的灵敏度高,无进向误差,无死区,价格便宜,适合于大多数工程和科研地球物理调查。光泵式海洋磁力仪灵敏度和采样率最高,梯度容忍度最大,但存在死区和进向误差问题,适用于高精度的海洋磁力梯度调查和航空磁力调查。分析结果显示:各种类型的磁力仪各有优势,具体选用应以具体情况而定。 |
| 关键词: 海洋磁力仪 梯度仪 质子旋进 Overhauser 海洋磁力仪 光泵 技术指标 |
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| 基金项目:国际海底区域研究开发项目(DY105-03-01-05) |
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| Principle of marine magnetometer and specification comparative analysis |
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| Abstract: |
| There are many types of marine magnetometers in the globe market. The specifications of them are complex and the application fields are diverse, so there are difficulties in choosing and using the magnetometer products. In this paper the authors introduce the operational principles of three types of magnetometers, and analyze the specifications concretely, and brief the applications of magnetometer and the combined modes of the gr adiometer. There are low sensitivity and heading error for a proton precession magnetometer. But there is no dead zone and the price of it is the lowest. It is suitable for the projects and geophysical research surveys which do not demand high sensitivity. There are high sensitivity, no head error, no dead zone for an Overhauser magnetometer. And the price of it is not so high. It is suitable for most of the projects and geophysical research surveys. There are far higher sensitivity and sample rate and gradient tolerance for an optically pumped magnetometer. But there are dead zone and head error for it. It is suitable for high precision marine magnetic gradient surveys and aer omagnetic surveys. The analysis result demonstrates that there is its own superiority with each type of magnetometer and we should choose magnetometer according to concrete situation. |
| Key words: marine magnetometer gradiometer proton precession Overhaus er 's marine magnetometer optically pump specifications |