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Kinematic measurement method and device for large multi-plate wave simulation system

A technology of motion measurement and simulation system, which is applied in the direction of measuring device, camera device, machine/structural component testing, etc., to achieve the effect of improving data transmission efficiency, promoting application promotion, and low data transmission efficiency

Active Publication Date: 2017-06-13
DALIAN UNIV OF TECH
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  • Claims
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Problems solved by technology

These two methods can partially solve some on-site evaluation problems, but there are big problems in the accuracy of time control, the number of simultaneous measurements on wave-making plates, the cost of experimental measurement, and the convenience of operation.

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  • Kinematic measurement method and device for large multi-plate wave simulation system
  • Kinematic measurement method and device for large multi-plate wave simulation system

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Embodiment Construction

[0023] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and technical solutions.

[0024] A motion measurement method and device applied to a large-scale multi-plate wave simulation system, the structure of which is shown in the attached figure 1 shown:

[0025]Including a computer 1, an infrared enhanced industrial camera with a fixed-focus lens 2 (the number is determined by the measurement range), an infrared supplementary light device 4 (the number is determined by the imaging conditions on site), several circular fluorescent markers 5 and EtherCAT Image processing board 3 (the number is consistent with the number of cameras). The entire measurement system adopts the EtherCAT network construction form, in which the computer 1 is the master station of the measurement network. The infrared-enhanced industrial camera 2 is arranged above the wave-making system, and the field of view covers all the w...

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Abstract

The invention belongs to the field of image measurement, and provides a kinematic measurement method and device for a large multi-plate wave simulation system. When kinematic measurement is performed on a wave maker, a video camera is used for acquiring field images, a mark point on each wave making plate is recognized in an image processing plate, and a central position is calculated. The central position is compared with an initial position, and image shifting is calculated and transformed into displacement in a physical space according to calibration parameters. Next, data are transmitted to a computer by an EtherCAT network, and then the data are encoded and recognized. Finally, a kinematic measurement value and a target value of each wave making plate are compared and analyzed in the computer, so that kinematic information of the wave maker is acquired. The method sufficiently solves the problems of target recognition difficulty and kinematic tracking instability caused by non-uniform experimental field illumination in kinematic measurement of the wave maker, and solves the problems of large image analysis algorithm time consumption and low multi-camera system data transmission efficiency.

Description

technical field [0001] The invention belongs to the field of image measurement, relates to the real-time acquisition of the position of the wave-making plate and the evaluation of the combined motion curve in a large-scale wave simulation system, and particularly relates to a design method of an image measurement system based on an EtheCAT network. Background technique [0002] The wave simulation system (also known as the wave generator system) is a necessary environmental simulation equipment in the marine engineering laboratory. Through the use of the wave maker, regular waves and irregular waves can be artificially generated in the limited pools and tanks in the laboratory, providing a simulation environment for experimental verification for the development of marine equipment. [0003] When using a wave maker for wave simulation, the experimenter first sets the wave parameters according to the target spectrum; then calculates the motion curve of each wave maker accordin...

Claims

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Application Information

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IPC IPC(8): G01C11/02
CPCG01C11/02E02B1/02G01M10/00
Inventor 杜海孟娟李木国
Owner DALIAN UNIV OF TECH
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