Shield tunneling system capable of electromagnetically detecting and displaying conditions of ground therearound
US4774470A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1986 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Mar 31, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/30
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a shield machine, there are provided an electromagnetic wave transmitting and receiving unit mounted on the top of the shield machine for radiating electromagnetic impulse wave toward an underground and for receiving the electromagnetic wave reflected from the underground, and a position sensor for collecting an information regarding the position of the electromagnetic wave transmitter and receiver unit. Data processing unit is provided for processing the signals from transmitter/receiver and the position sensor and sent through a transmission line. The data processing unit continuously displays the condition of the underground at the cutting face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.