Metal detection system under multimode array excitation

A metal detection and array technology, applied in the field of information detection, can solve the problems of limited detection range, high detection accuracy, insufficient excitation of underground targets, etc., and achieve the effect of reducing interference

Pending Publication Date: 2021-02-12
ZHONGBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the technology of using transient electromagnetic method to detect underground targets is becoming more and more mature, there are still problems, such as insufficient excitation of underground targets due to a single transmitting coil, limited detection range, and high impact of non-target magnetic field interference on detection accuracy

Method used

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  • Metal detection system under multimode array excitation
  • Metal detection system under multimode array excitation
  • Metal detection system under multimode array excitation

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Embodiment Construction

[0026] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the embodiment of the application. Obviously, the described embodiment is only a part of the application Examples, but not all examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0028] Such as figure 1 As shown, a metal detection system under the excitation of a multimode array includes: a transmitting module, a receiving module and a multimode signal processing module, wherein:

[0029] The transmitting m...

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Abstract

The invention discloses a metal detection system under multimode array excitation, wherein the metal detection system comprises a transmitting module, a receiving module and a multimode signal processing module; the transmitting module comprises a signal source and a transmitting array, the signal source is used for generating a rectangular alternating pulse signal, and the transmitting array generates an alternating magnetic field according to the rectangular alternating pulse signal; the receiving module comprises a receiving array and a signal acquisition module, the receiving array is usedfor receiving an alternating magnetic field with / without underground target interference and generating an induction signal, and the signal acquisition module is used for acquiring the induction signal and transmitting the induction signal to the multimode signal processing module. According to the invention, the signal source generates a signal with an adjustable duty ratio, so that the interference of a primary field is reduced; when the duty ratio of the signal is increased, the zero-level time of the transmitted signal is prolonged, the observation time is also prolonged, the time for acquiring the induction signal is also prolonged, and the induction signal acquired in the earlier stage can be removed to reduce the interference.

Description

technical field [0001] The invention belongs to the technical field of information detection, in particular to a metal detection system excited by a multi-mode array. Background technique [0002] At present, the underground targets detected by people include: unexploded bombs, metal pipelines, non-metal pipelines, etc. As unexploded weapons left over from wars or military exercises, unexploded ordnance may explode again even decades later, posing a threat to the safety of people's lives and property. As an indispensable living facility for modern humans, underground pipelines must be managed in detail so that the underground pipelines will not be cut off during urban construction, causing unnecessary property losses. [0003] The domestic and foreign detection of underground targets mainly includes electrical detection, magnetic detection, ground penetrating radar detection, thermodynamic detection, etc. Among these methods, electrical detection is based on the difference ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/11
CPCG01V3/10
Inventor 李凯任雅君韩星程韩焱苏新彦
Owner ZHONGBEI UNIV
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