Method for rapidly judging inclination direction of target body

A technology of oblique direction and target body, applied in the field of geophysical transient electromagnetic detection, can solve the problems of single processing method, insufficient effect, small plane response, etc., achieve simple processing method, increase exploration speed, and reduce workload Effect

Pending Publication Date: 2022-01-21
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AI-Extracted Technical Summary

Problems solved by technology

[0002] At present, geophysical methods such as magnetic method, electromagnetic method, and ground-penetrating radar for detecting the metal casing of unexploded bombs have developed into mainstream unexploded bomb detection methods. These detection methods have their own advantages, but there are also certain deficiencies: Magnetic detection High efficiency and low cost, but the false alarm rate is as high as 90% to 99%; the detection effect of ground penetrating radar is seriously affected by the geological conditions, moisture content, and surface vegetation of the detection area; the electromagnetic method has strong anti-interference ability, but the detection effect is affected by To detect the impact of metal fragments in the area, a reasonable algorithm needs to be used to reduce the false alarm rate of the system
At present, for the detection of the tilt direction of UXO, the processing method is relatively simple. A relative...
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Method used

Step 2: carry out data processing for the first time. Use the first detection data to draw the plane response diagrams of different time periods, as shown in Figure 2, the small rectangle in the figure is the exact position of the target, and the number in the lower right corner is the time, here are 6 planes of different time periods Response graph. According to these planar response maps, the approximate location of the anomaly can be further determined and a sub-region of 2m×2m can be divide...
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In the prior art, when the size of an abnormal body is relatively small and under the condition of different inclination angles, the change of plane response along with time is very small, and accurate detection is difficult, aiming at the defects in the prior art, the invention provides a method for rapidly judging the inclination direction of a target body. According to the method, the original mode that a small launching wireframe is carried by a single unmanned aerial vehicle is changed into the mode that a large launching wireframe is carried by a plurality of unmanned aerial vehicles, the inclination angle of the launching wireframe is controlled by changing the flight heights of the unmanned aerial vehicles on the two sides, the same detection area is detected by using different inclination angles, and through a plurality of detection track curves with different inclination angles, the inclination and the inclination angle of the UXO can be quickly and correctly judged. According to the method, the UXO inclination direction detection problem can be well solved, and a new UXO detection thought is provided.

Application Domain

Electric/magnetic detectionIncline measurement +1

Technology Topic

EngineeringOptics +2


  • Method for rapidly judging inclination direction of target body
  • Method for rapidly judging inclination direction of target body
  • Method for rapidly judging inclination direction of target body


  • Experimental program(1)

Example Embodiment

[0023] The present invention will be described in detail below with reference to the accompanying drawings:
[0024] The present invention discloses a detection method and technique of rapid determination of UXO tilt directions based on transient electromagnetic methods.
[0025] Step 1: Perform the first detection. Based on the principle of electromagnetic induction, the fast sweeping surface detection is performed in the entire working area quickly, and the flight speed of the drone is 1 m / s to obtain the first probe data.
[0026] Step 2: Perform the first data processing. Draw a plane response map of different time periods using the first probe data, such as figure 2 As shown, the small reality in the figure is the exact location of the target body, the number of the lower right corner is time, and there is a planar response map of 6 different time periods. Based on these planar response maps, the abnormal position can be further determined and divided by a 2m × 2m sub-region, and the detection range is reduced. In addition, according to the plane response map of different time periods, the abnormal center (ie the maximum value) (here is the black and white map does not see the very large value, the center of the circle is a very large value) over time, figure 2 Take an example, over time, the abnormal center moves to the right, and the tilt direction of UXO can be obtained is lower.
[0027] Step 3: Perform a second detection. According to the principle of the optimal coupling of the return and conductor, the tilt direction is arranged according to the tilt direction of the UXO obtained in step I, and the inclination angle of the transmitted wire frame is adjusted by controlling the height of the drone on both sides of the transmitted wire. The sub-area to which it is described is detected to obtain the second probe data.
[0028] Step 4: Conduct the background site. A plurality of measuring points are taken in the range of remote ion regions (the inclination angle of the transmitted wire frame should be consistent with the step three), and the response of these measurements is given a background field response;
[0029] Step 5: In addition to the second detection data in the background, and draw a multi-test track of the line (such as Figure three As shown), the tilt angle of the target can be judged according to the multi-test channel; image 3 Examples image 3 The tilt angle of UXO is 0, which is horizontally placed. When the transmitted wire frame is 60 ° (rotating along the Y axis, the curve of the plurality of tests is presented to the left to move the right steep, description The transmitted wireframe needs to be adjusted counterclockwise; when the inclination angle is -60 °, the multi-test curve change is presented as the right movement of the left, and the transmitted wireframe needs to be adjusted clockwise.
[0030] Step Six: When the multi-test curve obtained in step 5 is not about the two sides of the maximum, repeat steps three to five until the two sides are symmetrical, such as image 3 In the middle, the multi-test curve when the radio frame is inclined at 0 ° is symmetrical with respect to the maximum, indicating that the inclination angle of UXO is about 0 °, corresponding to the tilt angle of UXO, in addition, the multi-measured The maximum value of the curve is the center point of UXO. There is a plurality of delayed phenomena while the remaining angles, so they need to be adjusted according to step five and repeat steps three to five.


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