Landmine detection system and method capable of suppressing background

A landmine detection and background technology, applied in radio wave measurement systems, electrical/magnetic exploration, geophysical measurement, etc., can solve the problems of reduced detector performance, poor background suppression capability, and high detector detection sensitivity

Pending Publication Date: 2020-10-09
上海微波技术研究所(中国电子科技集团公司第五十研究所)
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Selecting one of the frequency points as the transmission frequency has poor background suppression ability and can only be used in limited soil environments, such as sandy soil or clay or red soil or magnetic soil, which causes the detection sensitivity of the detector in the air Higher, once facing the complex soil environment, the performance of the detector will be greatly reduced

Method used

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  • Landmine detection system and method capable of suppressing background
  • Landmine detection system and method capable of suppressing background
  • Landmine detection system and method capable of suppressing background

Examples

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Effect test

Embodiment 1

[0085] A kind of landmine detection system capable of suppressing the background provided by the present invention comprises: such as Figure 5 as shown,

[0086] A mine detection system capable of suppressing the background provided according to the present invention includes:

[0087] Transmitting coil module, transmitting circuit module, receiving coil module, receiving amplifier circuit module, quadrature demodulation module and digital signal processing bandpass filter module;

[0088] The transmitting coil module is connected to the transmitting circuit module;

[0089] The receiving coil module is connected to the receiving amplifier circuit module;

[0090] The transmitting circuit module and the receiving amplifying circuit module are connected to the quadrature demodulation module;

[0091] The quadrature demodulation module is connected to the digital signal processing bandpass filter module;

[0092] The digital signal processing bandpass filter module is conne...

Embodiment 2

[0150] Embodiment 2 is a modification of embodiment 1

[0151] A landmine detection method and system capable of suppressing the background uses a digital processor to generate a plurality of transmitting signals with a frequency ranging from 1KHz to 1MHz to excite the transmitting coil. When a landmine target enters the detection receiving coil, the metal part of the mine will induce eddy current, which will generate a changing magnetic field on the surface of the metal part, and the receiving coil will induce the eddy current magnetic field to detect the target, and generate alarm audio and related display information.

[0152] The present invention adopts the landmine detection technology that digital signals of multiple frequencies are generated and processed, mainly including a transmitting coil and a receiving coil module, a transmitting circuit module, a receiving amplifier circuit module, an orthogonal demodulation module, a digital signal processing bandpass filter mod...

Embodiment 3

[0187] Embodiment 3 is a modification of embodiment 1 and / or embodiment 2

[0188] Such as image 3 As shown in the detection schematic diagram, multiple frequency combinations are generated by the digital processor, as shown in the attached figure 1 , and then mix multiple frequencies through an adder and send them to the transmitting coil for probe excitation. When detecting the entry of a landmine target near the receiving coil, the metal parts of the mine will induce eddy currents, which generate a changing magnetic field on the surface of the metal parts. The transmitting coil is made of multi-turn enameled wire, and the receiving coil is made of PCB coils. Multiple frequencies are generated by the digital processor to control the transmitting drive circuit part, and after filtering, a sinusoidal excitation signal is generated to drive the transmitting coil, and at the same time, one of the multiple transmitting frequency signals is attenuated and modulated and then sent...

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Abstract

The invention provides a landmine detection system and method capable of suppressing a background. The landmine detection system comprises the following parts: a transmitting coil module and a transmitting circuit module are connected; a receiving coil module is connected with a receiving and amplifying circuit module; a transmitting circuit module and the receiving and amplifying circuit module are connected with a quadrature demodulation module; the quadrature demodulation module is connected with a digital signal processing band-pass filter module; the digital signal processing band-pass filter module is connected with the transmitting circuit module; the method is better in background suppression performance, can extract detection background echo signals of a plurality of frequency points compared with a conventional single frequency, and can form a statistical filter.

Description

technical field [0001] The invention relates to the field of near-ground detection and perception, in particular to a landmine detection system and method capable of suppressing the background. Background technique [0002] Landmine detection mainly uses the principle of metal detection technology to detect and locate different types of mines buried in shallow soil. By using the transmitting coil to generate an alternating electromagnetic field in the detection environment, when a mine target appears near the detection coil, it will be excited by the alternating magnetic field. According to Maxwell's electromagnetic field theory, the changing magnetic field generates alternating current, so The metal parts inside the mine induce eddy currents, and at the same time, the induced eddy currents generate electromagnetic fields around them. Generally speaking, the appearance of this electromagnetic field will change the magnetic field of the receiving coil. By studying the intensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/11
CPCG01V3/10
Inventor 张勇吴美武孙绪仁徐凌云雷杰瞿诗华宋志毕刘恩晓杨琳
Owner 上海微波技术研究所(中国电子科技集团公司第五十研究所)
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