Marine electric field sensor test system and method

Abstract

The invention provides a marine electric field sensor test system and method, and belongs to the technical field of marine electric field sensor test. Multi-index test can be performed. The test system comprises a signal generator, a test box, a test circuit and a data acquisition recording subsystem, the test box comprises an outer box and an inner box, a constant-temperature water bath is arranged between the outer box and the inner box, and the inner box is filled with saline water and is provided with a conductive plate; the test circuit comprises a first acquisition end and a second acquisition end, the first acquisition end is connected with a first electrode of a to-be-tested sensor, a second electrode of the to-be-tested sensor is connected with a first single-pole double-throw switch, the second acquisition end is connected with a second single-pole double-throw switch, one wiring ends of the two single-pole double-throw switches are correspondingly connected, and a first resistor is connected between the other wiring ends; a second resistor is connected between the second single-pole double-throw switch and the first acquisition end; and the data acquisition recording subsystem comprises a data acquisition module connected between the first acquisition end and the second acquisition end, and further comprises a main control module and a monitoring module.

Description

technical field [0001] The invention belongs to the technical field of marine electric field sensor testing, and in particular relates to a testing system and a testing method for a marine electric field sensor. Background technique [0002] Marine electromagnetic field detection technology is currently widely used in marine environment detection, marine oil and gas resource detection, underwater target monitoring, etc. Marine electric field sensors are important tools for marine electromagnetic detection. Because the underwater electric field signal is extremely weak and the frequency of the electric field is extremely low, the potential drift and noise of the electric field sensor will seriously affect the accuracy of the ocean electric field measurement. According to the requirements of marine electromagnetic detection, marine electric field sensors are required to have low noise, low drift, low range, low impedance, high small signal response, etc. Therefore, the test a...

AI Technical Summary

Problems solved by technology

There are currently two main methods for impedance testing: one is to use an electrochemical workstation. This measurement method is costly and has a large current through the electrode, which is easy to polarize and cause damage to the electrode; the other is to use the patented Ag / The internal resistance measurement method of the AgCl electric field sensor can realize the measurement of the internal resistance of the sensor without causing the polarization of the electric field sensor, but it can only measure the DC impedance and cannot measure the AC impedance

At the same time, when using the above-mentioned existing test equipment, a set of test tools must be replaced every time an indicator is tested, which results in low test efficiency and high cost.

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