Electrode grounding resistance measuring system and electrode grounding resistance measuring method

Abstract

The invention provides an electrode grounding resistance measuring system and an electrode grounding resistance measuring method. The electrode grounding resistance measuring system comprises a power supply input circuit, which is used for generating voltage signals; a resistance circuit; a channel selection circuit; a signal processing circuit; a central processing unit; and a non-polarizing electrode group, which is embedded in ground, and is used for exploration adopting an electromagnetic method. The measuring method comprises steps that under the control of the central processing unit, the power supply input circuit is used to generate the voltage signals, and the channel selection circuit is used for switching on / off to measure the voltages among the non-polarizing electrodes, and finally, electrode grounding resistance is calculated according to the voltages generated by the voltage input circuit and the measured voltages among the non-polarizing electrodes. The electrode grounding resistance measuring system has a simple structure, and the electrode grounding resistance measuring method is convenient. The electrode grounding resistance measuring system is integrated in a receiver adopting the electromagnetic method, and the automatic measurement of the electrode grounding resistance is realized, and in addition, measurement accuracy is high, and measurement speed is fast.

Description

technical field [0001] The invention relates to the field of geophysical electromagnetic surveying, in particular to a measurement system and method for electrode grounding resistance. Background technique [0002] In the process of field electromagnetic prospecting, each electromagnetic prospecting signal receiver (hereinafter referred to as "receiver") needs to be connected to multiple non-polarized electrodes, for example: using the controlled source audio frequency magnetotelluric method (CSAMT) for electromagnetic In the case of surveying using the MT method, taking the measurement of the electric field of 9 channels as an example, 5 non-polarized electrodes need to be connected in each of the east and west directions, and a total of 10 electrodes need to be connected; , one electrode needs to be connected in each of the four directions of southeast, northwest, and 4 electrodes in total. [0003] The geographical environment for field electromagnetic exploration is dif...

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Problems solved by technology

[0004] The existing methods for measuring electrode grounding resistance are roughly divided into two categories. The first category is to use a hand-held multimeter to measure the resistance value between electrodes sequentially after connecting the electrodes and the measurement circuit. The accuracy of the measurement results of this method is not high. And the operation is cumbersome and the efficiency is low

The second type of method is to use a professional test instrument for measuring earth grounding resistance (refer to patent 201310032847.3), but this type of instrument needs to use additional metal electrodes, which are not compatible with the non-polarized electrodes commonly used in electromagnetic field testing, and cannot automatically measure a test line The resistance between multiple electrodes of

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