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A non-contact electromagnetic detection system and method for dangerous liquid

An electromagnetic detection, non-contact technology, applied in the field of non-contact electromagnetic detection systems for dangerous liquids, can solve the problems of human injury, inability to detect flammable and explosive liquids, non-contact detection, and high cost of X-rays, and achieve detection The effect of long distance, high resolution and low system power consumption

Active Publication Date: 2021-06-08
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its advantage is that it can penetrate plastic, glass and even metal, but the cost of X-ray-based detectors is extremely high, and direct application to human body detection will cause harm to the human body
[0003] Therefore, none of the existing detection technologies can detect flammable and explosive liquids in a safe and non-contact manner. The safety detection and identification of flammable and explosive liquids has become the research focus and urgently needed technology for high-precision detection of public safety.

Method used

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  • A non-contact electromagnetic detection system and method for dangerous liquid
  • A non-contact electromagnetic detection system and method for dangerous liquid
  • A non-contact electromagnetic detection system and method for dangerous liquid

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Embodiment 1

[0035] This embodiment discloses a non-contact electromagnetic detection system for dangerous liquids. The system is equipped with a hardware system and a software system. The hardware system is a radar system with a ranging function, and the software system includes reflection intensity detection and reflection space. The software detection of spectral peak detection, during detection, the hardware system sends millimeter wave signals, acquires and preprocesses the millimeter wave echo data of the object to be detected, and realizes non-contact detection through software system detection and analysis.

[0036] The radar system includes a signal generating circuit, a transmitting antenna, a receiving antenna, a signal receiving and demodulating circuit, a digital signal sampling and processing circuit and related control circuits.

[0037] Both the receiving antenna and the transmitting antenna are wide-band, high-gain antennas. The beam width of the receiving antenna and the ...

Embodiment 2

[0040] This embodiment discloses a non-contact electromagnetic detection method for dangerous liquids. When the method is implemented, the non-contact electromagnetic detection system for dangerous liquids described in the first aspect is implemented, and the method includes the following steps:

[0041] S1 powers on the radar system, calibrates the system, and enters the waiting state;

[0042] S2 uses the radar system to detect the object to be tested, and obtains the millimeter wave echo data of the detected object;

[0043] S3 selects the reflection space spectrum peak detection method to analyze the data in S2 to obtain the detection result;

[0044] S4 selects the reflection intensity detection method to analyze the data in S2 to obtain the detection result;

[0045] S5 comprehensively analyzes the detection results in S3 and S4 to get the final conclusion.

[0046] The reflection space spectrum peak detection method is to use the characteristics of high electrical los...

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Abstract

The invention relates to the technical field of safety detection, in particular to a non-contact electromagnetic detection system and method for dangerous liquids. The system includes hardware and software. The hardware part includes signal generating circuit, transmitting antenna, receiving antenna, signal receiving and demodulating circuit, digital signal sampling and processing circuit and related control circuit, which can realize reflected wave signal detection and high spatial resolution. Among them, the transceiver antenna is a high-gain, narrow-beam, low-side-lobe antenna, which can realize effective detection of reflected wave signals, reduce clutter and achieve high spatial resolution. The software part uses algorithms to realize spatial reflection spectrum peak detection with high spatial resolution, reflection signal strength detection, electromagnetic wave system correction and signal compensation in the far field area. The invention establishes a multi-feature model and an algorithm theory to identify flammable and explosive liquids by detecting the two characteristics of the liquid's reflection intensity to electromagnetic waves and the peak of the reflection spectrum, and realizes non-contact safety inspection of liquids carried by the human body.

Description

technical field [0001] The invention relates to the technical field of safety detection, in particular to a non-contact electromagnetic detection system and method for dangerous liquids. Background technique [0002] In recent years, terrorist attacks around the world have seriously threatened human life and property, especially in densely populated areas, and terrorist attacks in densely populated public transportation areas are on the rise. In order to effectively curb terrorist attacks, ensure the safety of passengers and the safety of public transportation operations, it is necessary to implement safety inspections at subways, light rails, trains, buses and other public transportation stations. The existing X-ray security inspection equipment can complete the security inspection of the items in the passenger's backpack and suitcase. However, the threat items hidden in the passenger's clothes need to be detected through manual security inspection. In recent years, terahe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/12
CPCG01V3/12
Inventor 何国强杨雪霞谢宁杰
Owner SHANGHAI UNIV
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