Method for transient electromagnetic detection of underground abandoned chemical weapons
A chemical weapon and transient electromagnetic technology, applied in the field of transient electromagnetic detection, can solve problems such as low work efficiency, limited detection distance, and poor anti-interference ability of magnetic detection methods, and achieve high work efficiency, fast data collection, and wide application foreground effect
Inactive Publication Date: 2019-12-20
CHINA UNIV OF MINING & TECH
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Problems solved by technology
Therefore, different electromagnetic methods have been developed to detect chemical weapons, such as the magnetic detection method, but the magnetic detection method has poor anti-interference ability and low work efficiency; there is also a ground radar method, but the ground radar method has strict requirements on the detection environment , especially when the difference between the soil medium coefficient and the shell is not obvious, and the medium is wet or there is water, the detection distance is very limited; in addition, there is infrared remote sensing technology detection, but this technology can only detect the depth of about 1 meter. Can not achieve the purpose of detection
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Embodiment 1
[0034] Step 1: Delineate the detection area: First, determine the target detection area according to the war history data and geological data, and divide it into different detection units according to the geological and topographical characteristics.
[0035] Step 2: Design the coil: design the transmitting coil and the receiving coil, the transmitting coil and the receiving coil are respectively connected to the transient electromagnetic instrument, the transmitting coil is used to transmit a pulsed electromagnetic field, and the receiving coil is used to receive the secondary induced eddy current Electromagnetic field; in this embodiment, the transmitting coil and the receiving coil are overlapping loop structures. The number of turns of the transmitting coil ranges from 4 turns to 20 turns, the number of turns of the receiving coil ranges from 20 turns to 40 turns, and the range of current in the transmitting coil is 10A to 50A. Both the transmitting coil and the receiving ...
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The invention discloses a method for transient electromagnetic detection of underground abandoned chemical weapons, and the method comprises the following steps of delimiting a detection area and dividing a detection unit; designing a transmitting coil and a receiving coil, which are respectively connected to a transient electromagnetic instrument for transmitting a primary pulse electromagnetic field and receiving a secondary induction eddy current electromagnetic field; measuring a background field to obtain the data of the background field; performing detection in the detection area to obtain measured data; comparing and analyzing the obtained data to observe whether there are abnormal values; if so, redesigning a transmitting coil and a receiving coil in the detection unit, performingfine detection by using the obtained small wire frame, drawing the detection result into an image, and obtaining the position of the chemical weapon; and then performing excavation. The detection method provided by the invention can effectively detect chemical weapons buried in the ground and having metal shells, has high sensitivity, can protect the personal safety of construction and detection personnel as being non-contact, and is fast in data collection and high in work efficiency.
Description
technical field [0001] The invention relates to the field of transient electromagnetic detection, in particular to a method for transient electromagnetic detection of underground abandoned chemical weapons. Background technique [0002] The chemical weapons that have been excavated show that the casing of chemical weapons is a good conductive metal material, which provides a physical basis for electromagnetic detection. Therefore, different electromagnetic methods have been developed to detect chemical weapons, such as the magnetic detection method, but the magnetic detection method has poor anti-interference ability and low work efficiency; there is also a ground radar method, but the ground radar method has strict requirements on the detection environment , especially when the difference between the soil medium coefficient and the shell is not obvious, and the medium is wet or there is water, the detection distance is very limited; in addition, there is infrared remote sen...
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IPC IPC(8): G01V3/11
CPCG01V3/10
Inventor 苏本玉谷德忠
Owner CHINA UNIV OF MINING & TECH