Shield tunneling system capable of electromagnetically detecting

Details Shield tunneling system capable of electromagnetically detecting Shield tunneling system capable of electromagnetically detecting

1986-03-31

1988-09-27

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

175 50, 299 1, 324500, G01V 312, G01V 334, E21D 910, E21B 4700

Patent

active

047744707

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.

REFERENCES:
patent: 2940302 (1960-06-01), Scherbatskoy
patent: 3064127 (1962-11-01), Green etal.
patent: 3238448 (1966-03-01), Wood et al.
patent: 4167290 (1979-09-01), Yamazaki et al.
patent: 4297699 (1981-10-01), Fowler et al.
patent: 4383220 (1983-05-01), Baldwin
patent: 4511842 (1985-04-01), Moran et al.
patent: 4560931 (1985-12-01), Murakami et al.

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