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Bridge deflection detection method based on image processing

A bridge deflection and detection method technology, applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems of manual measurement, low measurement accuracy, limited range, etc., to achieve convenient long-term bridge detection and less hardware resources , the effect of measuring low cost

Inactive Publication Date: 2018-07-17
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0004] There are some unavoidable defects in the traditional bridge deflection detection method. The percentage method is only suitable for bridges on rivers with relatively shallow water; High precision, strong anti-interference, but limited range; the precision level method can only rely on manual measurement, which is greatly affected by man-made and the environment, and the efficiency is low; GPS satellite positioning system, the measurement accuracy is not high, and the cost is high, etc., and The measurement method based on image processing technology is a method of measuring bridge deflection that can avoid these defects

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  • Bridge deflection detection method based on image processing
  • Bridge deflection detection method based on image processing
  • Bridge deflection detection method based on image processing

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Embodiment 1

[0053] combine Figure 1~2 , the steps of the bridge deflection detection method based on image processing proposed by the present invention are as follows:

[0054] Step 1: Equipment installation and image acquisition

[0055] First, install the system’s cuboid housing with a camera and a target plane on the part of the bridge to be tested, and fix the red semiconductor laser at a fixed position at the corresponding end of the target plane, so that the light emitted by the red semiconductor laser is consistent with the target plane. Vertical, and the initial position of the light spot before measurement is in the center of the target plane. Use a total station to perform remote calibration of the target plane and semiconductor laser. During detection, the embedded system collects images containing target light spots through a USB camera.

[0056] Step 2: Image preprocessing

[0057] In the bridge deflection detection method based on image processing proposed by the presen...

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Abstract

The invention discloses a bridge deflection detection method based on image processing. The method comprises the following steps: to begin with, fixing a red semiconductor laser at a fixed position, installing a camera in a cuboid box, of which five surfaces are lightproof and one surface is a semi-transparent screen, and fixing the box on a bridge to be measured; adjusting the position of the laser to enable laser spot to hit in the middle position of the semi-transparent screen; connecting the camera to an embedded processor, and obtaining image information comprising the light spot and carrying out processing to obtain position information of the light spot; and with change of deflection of the bridge, the position of the light spot on the light screen changing accordingly, and measuring deflection change through light spot displacement. The method is convenient and simple to operate; hardware is light and small; and measurement is accurate.

Description

technical field [0001] The invention belongs to the technical field of long-distance non-contact measurement, in particular to a bridge deflection detection method based on image processing. Background technique [0002] In a modern society where mechanized equipment is highly concentrated, measurement technology undoubtedly occupies a pivotal position. However, the current requirements for measuring equipment not only require high measurement accuracy and efficiency, but also require the measurement equipment to be easy to operate, light to carry, and have a high degree of automation. In some special occasions, such as high temperature, small size, high speed, long-term detection, etc., the traditional measurement method has been difficult to meet the daily needs. Therefore, it is of great significance to explore and research new automatic long-distance non-contact measurement methods. [0003] Non-contact measurement methods generally include acoustic wave measurement, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
CPCG01B11/16
Inventor 房红兵林英豪高建坡张吉璇
Owner NANJING UNIV OF SCI & TECH
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