Real-time fusion method for multichannel data of ground penetrating radar

A technology of ground penetrating radar and fusion method, which is applied in the direction of reflection/re-radiation of radio waves, utilization of re-radiation, measurement devices, etc. Achieve the effect of satisfying real-time processing, simple fusion method and improving signal-to-noise ratio

Active Publication Date: 2015-04-29
中电科(青岛)电波技术有限公司
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Problems solved by technology

[0004] (1) Due to the size limitation of the display, it is impossible to display all the radar maps at the same time, and can only be viewed separately
For isolated targets or abnormalities, only responding on some channels may miss detection
[0005] (2) The mul

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  • Real-time fusion method for multichannel data of ground penetrating radar
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  • Real-time fusion method for multichannel data of ground penetrating radar

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Example Embodiment

[0035] Example 1, figure 1 For the whole signal processing flow chart of this embodiment, when the multi-channel ground penetrating radar detects the target area, it usually scans along the survey line in a distance-triggered manner. If the trigger distance is set to 0.36cm, that is to collect a radar data echo every 0.36cm forward. The radar data echoes collected by a single channel are as follows: figure 2 As shown in , where the abscissa indicates the number of sampling points, which is 1024 points in this example, and the ordinate indicates the amplitude, which is the equivalent amplitude of the received analog echo signal after quantization. Because the channels are independent of each other, the data of different channels will be different. Usually, the collected radar data echo not only contains target information but also contains system noise and random noise.

[0036] image 3 Yes figure 2 The frequency spectrum corresponding to the radar data echo, where the a...

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Abstract

The invention discloses a real-time fusion method for multichannel data of a ground penetrating radar. The real-time fusion method for the multichannel data comprises the following steps that 1, band-pass filtering is conducted on radar data of each channel according to the antenna center frequency; 2, a system time zero point is determined, the data of the channels are rearranged and aligned; 3, an original point of a coordinate system is determined, and coordinate transformation is conducted on the observation data of each channel; 4, the comentropy of the data of each channel is worked out; 5, the weighted average fusion rule is adopted for fusion estimation; 6, a gain curve is calculated, and the gain is adjusted. By the adoption of the real-time fusion method for the multichannel data of the ground penetrating radar, real-time fusion is conducted on the data of the channels in the probe process of the ground penetrating radar, and all channel data information can be checked at a time just by displaying a fused data result on a radar screen. Compared with existing method that the data of the channels are checked through switching operation, the real-time fusion method is more easy and convenient and more visual. Meanwhile, the situations that due to the fact that the data of all the channels can be checked one by one, leak detection is caused, and misjudgment is made are avoided.

Description

technical field [0001] The invention relates to the field of ground-penetrating radar data processing, in particular to a method for real-time fusion of multi-channel data of ground-penetrating radar in the field. Background technique [0002] Ground-penetrating radar is a detection method that uses high-frequency radio waves to determine the distribution of substances inside the medium. If ground penetrating radar is used to detect an area of ​​interest, the area should be divided into equally spaced survey lines, and then equally spaced scans will be performed along each survey line, so as to realize the coverage detection of the entire area. In order to improve efficiency and reduce operational difficulty, multi-channel ground penetrating radar came into being. [0003] Using multi-channel ground-penetrating radar to scan once along the survey line can get multiple radar maps of the entire area, which realizes the detection of the same target at different frequencies or ...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S13/88
CPCG01S7/41G01S13/885
Inventor 冯温雅施兴华费翔宇林楠张志文刘贤麟王成浩黄珊珊张晋
Owner 中电科(青岛)电波技术有限公司
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