发明授权
- 专利标题： Buried power line contact alert
- 专利标题（中）： 埋电线接触警报
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申请号： US487830申请日： 1990-03-05
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公开(公告)号： US5027108A公开(公告)日： 1991-06-25
- 发明人: Alden J. Gray
- 申请人： Alden J. Gray
- 专利权人： Gray Alden J
- 当前专利权人： Gray Alden J
- 主分类号： G01R31/02
- IPC分类号： G01R31/02
摘要：
A method and a device for use with horizontal boring equipment or excavating equipment while making an underground tunnel or digging near known or unknown electric power lines. The device indicates contact with the electrical conductors, whether the contact is momentary or continuous, by monitoring voltage gradients in the earth and activating an alarm if voltage is sensed.
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