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Bridge vibration mode measuring method, device and system

A measurement system and measurement method technology, applied in the field of measurement, can solve the problems of limited number of measurement points, difficult installation, high equipment cost, etc., and achieve the effect of improving measurement accuracy, reducing calculation amount, and reducing cost

Active Publication Date: 2021-09-03
CHINA RAILWAY SEVENTH GRP CO LTD +1
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Problems solved by technology

But this method has the following disadvantages: (1) The number of measuring points is extremely limited, and it is impossible to obtain high-order mode shapes
(2) External power supply and data acquisition and transmission equipment are required
(3) The equipment cost of the sensor and its collector is high, and the installation is difficult
(4) The synchronization of the data of each measuring point is not high
However, the cost of this camera is very high, and it also has certain requirements for operators, and the processing of image data requires the cooperation of a computer with a higher configuration to complete

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  • Bridge vibration mode measuring method, device and system
  • Bridge vibration mode measuring method, device and system
  • Bridge vibration mode measuring method, device and system

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] The specific realization of the present invention is described in detail below in conjunction with specific embodiment:

[0034] Provided in this embodiment is a bridge vibration measurement system, including a video acquisition device, a laser radar, and an image data processing device, wherein the video acquisition device is used to collect the video of the bridge structure, especially the video of the main span of the bridge; The laser radar is used to emit a single-line laser to the set virtual measuring point, and the image data processing device is used to measure and calculate the bri...

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Abstract

The invention relates to a bridge vibration mode measuring method, device and system. The system comprises a video acquisition device, a laser radar and an image data processing device; the laser radar is used for emitting single-line laser to a virtual measuring point of a bridge, the video acquisition device is used for acquiring video images of a target area before and after the single-line laser is emitted, and the image data processing device is used for measuring and calculating the vibration mode of the bridge according to the collected video image. According to the embodiment of the invention, the video and the single-line laser are combined, the virtual measuring point in the target area image is obtained, the single-line laser is emitted to the virtual measuring point to obtain the displacement vector of the virtual measuring point, the static balance curve of the bridge is further obtained, and the original vibration mode of the bridge is obtained through the change of the spatial position of the virtual measuring point; and the vibration response of the virtual measuring point is obtained in combination with the mobile phone shooting frame rate, so the vibration of the bridge is quantitatively described.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a method, device and system for measuring bridge vibration shapes. Background technique [0002] The measurement of bridge structure vibration information is an essential content of bridge structure health monitoring. The vibration information of the structure reflects the overall safety performance of the bridge, and is an important data source for the damage identification and safety state assessment of the bridge structure. The vibration information of the structure includes key parameters such as natural frequency, mode shape, and damping coefficient. At present, there are relatively mature measurement methods for natural frequency and damping coefficient, but the effect of natural frequency and damping coefficient on structural damage identification and safety state assessment is not good. [0003] The measurement methods of bridge structure vibration can b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00G01M1/12
CPCG01H9/00G01M1/12Y02T90/00
Inventor 冯丹赵少强李二伟徐旭升郝云超谭若愚冯俊迎郝先慧郑军星吕建源王鸿飞
Owner CHINA RAILWAY SEVENTH GRP CO LTD
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