Fixing a geographical reference of a vehicle travelling...

Details Fixing a geographical reference of a vehicle travelling... Fixing a geographical reference of a vehicle travelling...

Category

G - Physics

Subcategory

01

Subsubcategory

V

CPC

340/105

IPC codes

G01V 3/165 (2006.01) G01N 27/83 (2006.01) G01V 3/10 (2006.01)

Type

Patent

Patent number

CA 1194960

Description

ABSTRACT In a pipeline through which a vehicle such as a pig is travelling, a magnetically activated detector detects the presence of the approaching pig and sends a signal to switch on a transmitter unit which supplies an alternating current to an AC coil. The flux signal generates a magnetic field for a preselected period, the flux signal being then sensed by a pair of cross coil sensors on board the pig after which the signal is processed in a unit on-board the pig. A reference pulse is then output.

Application Number

411491

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