Apparatus and method for measuring earth induction current and pipe-to-soil potential of buried pipe

Abstract

The invention relates to a measuring device and a method for geomagnetic induction current and pipe-to-soil potential of buried pipelines. The measuring device includes: a plurality of detective poles for the pipelines, a plurality of reference electrodes, a plurality of GPS synchronous recording devices and a data processing device, wherein, a plurality of detective poles for the pipelines and aplurality of reference electrodes are used for obtaining the instant pipe-to-soil potential at a plurality of measuring points; a plurality of GPS synchronous recording devices are used for recordingthe data of the instant pipe-to-soil potential; and the data processing device is used for obtaining the surface electric-field intensity, the pipeline parameters, the geomagnetic induction current and the pipe-to-soil potential, as well as the time distribution of the geomagnetic induction current and the pipe-to-soil potential at the identical place but different time, and the spatial distribution thereof at identical time but different places according to the data of the instant pipe-to-soil potential. The measuring device and the method of the invention can obtain the accurate geomagneticinduction current and pipe-to-soil potential as well as the time and spatial distribution thereof, and have the advantages of multifunction and high accuracy, etc.

Description

technical field

[0001] The invention relates to the field of buried pipeline system monitoring, in particular to a measurement device and method for buried pipeline geomagnetic induction current and pipeline-ground potential. Background technique

[0002] A series of solar activities such as sunspots, flares and corona can produce magnetic storms, which interfere with changes in the Earth's magnetic field. It can be known from the principle of electromagnetic induction that buried pipelines (one of buried conductors) will generate induced currents, namely geomagnetic induced currents (GIC for short). Since the solar wind flows in a relatively fixed direction (mostly east-west), the geomagnetic induction current of buried pipelines caused by geomagnetic storms has strong directionality. Generate a large geomagnetic induction current. The existence of the geomagnetically induced current increases the interference of stray currents on the cathodic protection of buried pipelin...

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