Ship steel plate dynamic three-dimension measurement method based on multi-camera vision

A three-dimensional measurement, multi-eye vision technology, applied in measurement devices, instruments, etc., can solve problems such as slow measurement speed, inconvenient use, and time axis mismatch.

Inactive Publication Date: 2012-09-19
ZHENJIANG YIHAI SOFTWARE
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, the commonly used non-contact measurement methods are laser measurement method and visual measurement method. When measuring static objects with laser measurement method, accurate three-dimensional data can be obtained, but when measuring dynamic objects, the requirements for the environment are high, and the time axis is different Correspondence, slow measurement speed, and inconvenient use

Method used

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  • Ship steel plate dynamic three-dimension measurement method based on multi-camera vision
  • Ship steel plate dynamic three-dimension measurement method based on multi-camera vision
  • Ship steel plate dynamic three-dimension measurement method based on multi-camera vision

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Embodiment Construction

[0018] The hardware connection of the inventive method is as figure 1 As shown, it includes four synchronous high-resolution industrial cameras with a resolution above 1440*1080 and a frame rate of 10fps fixed on the measurement frame. The images taken by the four industrial cameras are transmitted to a computer with 1394 lines and 1394 cards for processing. The high-performance computer for storage and analysis can analyze the dynamic three-dimensional measurement data of ship steel plates.

[0019] The flow process of the inventive method is as figure 2 Shown:

[0020] 1. Draw some sparse points or characters that will not be burned on the measured steel plate. These points or characters are used to find the corresponding relationship on the time axis. Try to draw more points on the edge of the measured steel plate. This helps to accurately measure the edge of the steel plate being tested.

[0021] 2. Four synchronous high-resolution industrial cameras fixed on the measu...

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Abstract

The invention relates to a technique for measuring ship steel plate bending deformation in the ship manufacture process, in particular to a ship steel plate dynamic three-dimension measurement method based on multi-camera vision. The method is that four synchronous high-resolution industrial cameras with resolution ratio above 1440*1080 and frame rate as 10fps are fixed on a measuring frame of a ship steel plate bending automated control system, images shot by the four industrial cameras are transmitted to a high-performance computer capable of performing storing and analyzing through a 1394 line and a 1394 card, and ship steel plate dynamic three-dimension measured data analysis including steps of dynamic three-dimension measurement and algorithm is conducted. By aid of the ship steel plate dynamic three-dimension measurement method, the steel plate surface is not contacted, and dynamic three dimensions of a ship steel plate can be measured automatically, timely, conveniently and accurately.

Description

technical field [0001] The invention relates to a measurement technology for bending deformation of a ship hull steel plate in a ship manufacturing process, in particular to a dynamic three-dimensional measurement method for a ship steel plate based on multi-eye vision. technical background [0002] The bending of ship steel plates is an important part of ship manufacturing. Since the steel plate used for ships is relatively thick, it is very difficult to accurately bend a thick steel plate to the shape required by the design. At present, shipbuilding companies mostly use manual beating after burning, and then compare the target model. Due to the high labor intensity, time-consuming, low precision and low efficiency of the current processing method, our company has developed an automatic control system for ship plate bending. The problem that must be solved in this system is how to measure the dynamic three-dimensional shape change of ship plate. Since sensors cannot be ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/20
Inventor 史金龙张洪涛
Owner ZHENJIANG YIHAI SOFTWARE
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