Insulator breakage fault detection method based on second-generation curvelet coefficient morphology band energy method

A technology of curvelet coefficient and insulator, which is applied in the field of insulator damage fault detection based on the second-generation curvelet coefficient morphology strip energy method, which can solve the problems of complex images and achieve high accuracy

Inactive Publication Date: 2012-10-24
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

However, due to the complexity of the image of the catenary suspension device, there have been no relevant reports at home and abroad on the research on the fault detection and analysis of insulator porcelain bottles by image intelligent detection method

Method used

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  • Insulator breakage fault detection method based on second-generation curvelet coefficient morphology band energy method
  • Insulator breakage fault detection method based on second-generation curvelet coefficient morphology band energy method
  • Insulator breakage fault detection method based on second-generation curvelet coefficient morphology band energy method

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Experimental program
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Effect test

Embodiment

[0070] In order to verify the effectiveness of the insulator fracture fault identification algorithm based on the second-generation curve wave morphological closed operation energy strip method, the fault map and non-fault map taken under different conditions in the collection gallery were tested for recognition.

[0071] Fault 1: If Figure 9 , a piece is missing at the left edge of the insulator. The test results are shown in Figure 10, where:

[0072] Figure a image preprocessing results

[0073] Figure b is the result of curvelet directional filtering;

[0074] Figure c is the result of direction morphology closing operation;

[0075] Figure d shows the energy distribution of the strip.

[0076] It can be clearly seen from the figure that the position where the curve wave coefficient should have a uniform distribution is missing, and it can be clearly judged that the insulator is damaged at this position.

[0077] Fault 2: If Figure 11 , a piece is missing in the mi...

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Abstract

The invention discloses a rapid fuzzy matching method used in high-speed railway catenary rod insulator adverse-state detection. Aiming at problems of electrified railway catenary insulator ceramic bottle breakage fault detections, insulator characteristic quantities are obtained by anisotropic directional filtering upon comprehensive vehicle inspection field images by using second-generation curvelet. For solving a problem that the ceramic bottle characteristic coefficient distributions of different insulators are irregular, a method for balancing curvelet coefficients by utilizing directional morphological closing operation is provided. For solving a problem of intelligent identification, a method of dimension reduction upon curvelet coefficient matrix by utilizing an energy band method is provided. With the method provided by the invention, insulator position information can be obtained, and insulator fault can be determined. As a result of experiments, with the method, global analysis can be directly carried out upon images shot in field. Relatively high accuracies are achieved in insulator positioning in the images, and in insulator fault determinations. Therefore, a novel means is provided for electrified railway insulation reliability detections.

Description

technical field [0001] The invention relates to an image processing method-based automatic identification and detection method for broken faults of catenary insulators. Specifically, it is a strip energy automatic identification and detection method based on the normalization of the second-generation curvelet coefficient directional morphological coefficients. Background technique [0002] All high-speed railways use electric traction, which is the most energy-efficient and environmentally friendly rail transit traction method known so far. Therefore, at present, all newly-built rail transit, whether it is high-speed, heavy-duty, or urban rail transit, almost all use electric traction. The electric locomotive draws current from the catenary under high-speed operating conditions. It must ensure uninterrupted and absolutely reliable current reception during operation. How to ensure high-speed trains have good current reception quality is one of the key technologies for electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88
Inventor 刘志刚韩志伟
Owner SOUTHWEST JIAOTONG UNIV
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