发明授权
- 专利标题： Underground exploration apparatus
- 专利标题（中）： 地下探测仪
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申请号： US11257031申请日： 2005-10-25
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公开(公告)号： US07109718B2公开(公告)日： 2006-09-19
- 发明人: Shigekazu Shimizu , Yasuo Takahashi , Yukio Kishimoto , Tomoaki Ueda , Kazuhito Nakamura
- 申请人： Shigekazu Shimizu , Yasuo Takahashi , Yukio Kishimoto , Tomoaki Ueda , Kazuhito Nakamura
- 申请人地址： JP Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JP Tokyo
- 代理机构： Fitzpatrick, Cella Harper & Scinto
- 优先权： JP2004-317845 20041101
- 主分类号： G01V3/06
- IPC分类号： G01V3/06
摘要：
A current to be applied to a ground is defined as the sum of two sinusoidal waves having first and second frequency components. A signal to be used at the time of synchronous detection is defined as a difference between the sinusoidal waves having the first and second frequency components. As a result, a substance in the ground, and the position and depth of the substance can be specified with high accuracy.
公开/授权文献
- US20060091890A1 Underground exploration apparatus 公开/授权日：2006-05-04