Portable underground metal detecting device

Abstract

The invention discloses a portable underground metal detecting device. A plurality of groups of ultrahigh-sensitivity magneto-resistance sensors are adopted to form an array vector gradient to detectunderground ferromagnetic objects, through use of the ultrahigh-sensitivity magneto-resistance sensors, the power consumption of the device is reduced, and the signal resolution capability of the device is improved; due to the fact that the geomagnetic gradient is small, the array vector gradient is utilized to effectively reduce the influence of surrounding geomagnetic fields and interference magnetic fields, and meanwhile, the information acquisition density is enhanced, so that the detection efficiency and effectiveness are improved; through the use of detachable speed measuring wheels, theinfluence of human factors during testing is reduced, and the reliability of detection is improved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic detection, and in particular relates to a portable underground metal object detection device. Background technique [0002] With the rapid development of economic construction and the continuous expansion of industrialization and urbanization, some previously neglected areas have been developed into large-scale construction sites such as industrial areas, special warehouses, bridges, ports, waterways, and residential areas. During this process, some metal object detection problems such as underground pipelines, cables, and abandoned artillery shells (UXO) have greatly increased the difficulty of engineering geological exploration, especially abandoned artillery shells, bacterial bombs, and poisonous gas bombs. A big hidden danger. Many countries and regions in the world have left a lot of UXO whether it was World War II or later local wars. According to statistics: more than 50 countries h...

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Problems solved by technology

[0006] 1) The sensitivity of the magnetic sensor is not high, the signal-to-noise ratio is low, it is difficult to identify and distinguish small underground magnetic objects, and it is easy to cause missed detection;

[0007] 2) A single point measurement is easily affected by human factors, and the amount of information is not dense enough, and the detection accuracy and reliability are not high; if the total field or magnetic field component is measured, it is easily affected by the daily change of the geomagnetic Affect feature extraction

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