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| THE RESEARCH SITUATION OF THE GRADIOMETER IN THE WORLD |
| WU Qiong1, TENG Yun-tian1, ZHANG Bing2, ZHANG Tao3 |
1. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;
2. Institute of Disaster Prevention, Yanjiao 065201, China;
3. National Earthquake Response Support Service, Beijing 100049, China |
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Abstract During the exploration of the underground medium structure, the gradiometer as well as its new deployment styles for various applications has become an important research topic of world concern. This paper describes various kinds of gradiometers based on torsion balance and difference algorithm and deals with the principle of each instrument. In addition, the absolute gradiometers based on the laser and atom interference are also described. In the last part of this paper, the design of the measurement light path is presented. The results obtained by the authors can serve as the technologic reference for developing gradiometer.
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Received: 27 August 2012
Published: 10 October 2013
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