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Ultra-high vehicle approaching detecting method based on sensitive region image contour progressive increase

A technology for sensitive areas and vehicles, applied in instruments, character and pattern recognition, computer parts and other directions, which can solve problems such as slow calculation speed, influence of road driving conditions, and inability to judge the distance of oncoming vehicles one by one.

Inactive Publication Date: 2017-07-25
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods not only have a great dependence on road conditions, the algorithm is complex and the calculation speed is slow, but also they cannot be judged one by one when the distance between vehicles is small
Especially for a section of road with many overhead transmission line passages that need to be protected, if too many traffic fixed-limit elevated roads are assumed on the road, it will not only be expensive, but also require a large amount of construction, and will also have a serious impact on the driving conditions of the road

Method used

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  • Ultra-high vehicle approaching detecting method based on sensitive region image contour progressive increase
  • Ultra-high vehicle approaching detecting method based on sensitive region image contour progressive increase
  • Ultra-high vehicle approaching detecting method based on sensitive region image contour progressive increase

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 2 As shown, the overhead transmission line channel above the road is in the shape of a parabola, and the warning height A is set below its lowest point, and the monitoring camera device is parallel to the road surface to shoot. Among them, the in-lens settings such as image 3 As shown, the sensitive area is set as a rectangle, and the lower marking line of the rectangular sensitive area is parallel to the height A. This schematic diagram image 3 It is a sensitive area that divides the sensitive area into 4 rows and n columns, that is, 4×n blocks. image 3 In the middle, preset the background of the monitoring picture, record its gray level and compare the gray level of the camera picture at an interval of 10 frames. When no vehicle enters the picture, the background gray level basically remains unchanged. When a vehicle enters the picture, the more sensitive area Whether the gray value changes. Embodiment 1: When a vehicle enters the screen, the att...

Embodiment 2

[0044] Embodiment 2: When a non-vehicle disturbance enters the screen, the attached Figure 6Take falling insects as an example. When a flying insect lands in the lens, it also blocks the sensitive area, which will cause a frame difference in the image captured by the lens. At this time, the vehicle is not too high to reach the sensitive area. The method of the trend of regional module changes and the method of eliminating false alarms are described as follows:

[0045] Divide the sensitive area into sub-areas of 4×n blocks. Each sub-region includes p×q pixels (p represents the number of pixel rows in the sub-region, q represents the number of pixel columns in the sub-region, and both p and q are positive integers).

[0046] The sensitive sub-areas occupied by the edge of the landed insects are F(1,2)-F(10,4), and the pixels occupied in these sub-areas are X(F(1,2)), X(F(1,3) )...X(F(10,4)).

[0047] When the screen of the sensitive area changes, for example, after the fall...

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Abstract

The invention discloses a method for an ultra-high vehicle approaching detecting method based on sensitive region image contour progressive increase. The method includes the following steps: (1) erecting a monitoring camera on a utility pole where a power transmission line that requires protection is supported at a height in alignment with the safety height required in detection so as to enable the monitoring camera to be parallel to the road direction; (2) Taking one specific region from an image photographed by the monitoring camera as a sensitive region for capturing changes on the basis of the following selection criteria: 1. the height faces right to a specified alert height; 2. the image of the sensitive region is still; (3) dividing the taken sensitive region into m x n blocks, when the image of the sensitive region changes, acquiring the images of the blocks and comparing the blocks, screening the objects that enter the sensitive region, removing the interferences on images of the sensitive region by fallen leaves, flying insects and the like that approach the monitoring camera, determining the presence of an ultra-high vehicle from advancing objects, and sounding an alarm to the ultra-high vehicle with lights or broadcast.

Description

technical field [0001] The invention relates to a method of using an image analysis method to judge whether there is an approaching superhigh object under a power transmission line, in particular to prevent external forces from damaging the power transmission line caused by superhigh vehicles passing by. Background technique [0002] It is quite common for vehicles and personnel to pass under the overhead transmission line channel. In reality, there are often super-high and large vehicles passing through the overhead wires, hooking and hanging up the lines hanging above the road, which seriously threatens the safety of the power grid. In order to avoid damage to the transmission line caused by excessively high vehicle objects passing through the road, the warning height is preset under the overhead transmission line, that is, to ensure a certain safe distance between the top of the vehicle and the transmission line. It is urgent to find a method that can judge whether the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V20/52
Inventor 赵书涛李沐峰
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)