In-line real-time collinating measurer with computer visulization technique and its calibration method

A technology of computer vision and measuring devices, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of slow speed, low efficiency, inability to manufacture field applications, etc., and achieve the effect of fast speed

Inactive Publication Date: 2002-07-03
TIANJIN UNIV
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Problems solved by technology

[0003] Existing collimation measurement methods all use the physical benchmark as the reference object of measurement, such as the reference point method using the reference plane (or reference line) as the measurement reference; the laser collimation method using the laser beam as the measurement reference; the autocollimator method using The optical axis is the measurement reference; the drawing method uses the reference straight line as the reference; the coordinate measurement method uses the guide rail movement of the coordinate measuring machine as the reference, and their measurements are all contact type, with low efficiency and slow speed, and cannot be applied on the manufacturing site

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  • In-line real-time collinating measurer with computer visulization technique and its calibration method
  • In-line real-time collinating measurer with computer visulization technique and its calibration method
  • In-line real-time collinating measurer with computer visulization technique and its calibration method

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[0015] Such as figure 1 As shown, a complete detection system is composed of multiple visual sensors 2. The number of sensors can be determined according to actual requirements (required range and accuracy). The distance of the steel pipe is about 400mm, and it can also be adjusted according to the diameter of the steel pipe, the working distance of the sensor and other parameters;

[0016] The sensor is composed of a laser plane projector 8 and a camera 10, and the two form a triangular relationship in space to meet the requirements of the triangulation measurement principle, such as figure 2 shown. When the sensor is measuring, the light plane projector projects a laser plane onto the outer circle of the measured steel pipe to generate a circular arc such as figure 1 , the image comprising the arc is received by the video camera, and the video signal output by the video camera enters the computer 5 through the image acquisition card 3, and the computer analyzes the positi...

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Abstract

An in-line real-time collimating measurer using computer visualization technique is disclosed. A virtual is used to replace actual one. One or more visual sensors with a certain working distance and measuring range chosen accoring to the size and structure of object are arranged. Their controller has 485 port for connecting computer. The said sensor is composed of planar laser projector and camera, which has triangular relation for meeting triangular measuring principle. Its advantages include non-contact measurement and high speed.

Description

technical field [0001] The invention belongs to precision measuring devices, in particular to an online real-time collimation measuring device using computer vision technology. Background technique [0002] Collimation measurement belongs to the measurement of workpiece shape and position error, which is a part of geometric quantity measurement. It has extensive and important applications in the manufacturing industry. Collimation measurement involves many types of objects and applications, such as steel pipe processing in the steel industry Various large-scale production equipment installation, product parts assembly, etc. At present, there is no effective and unified collimation measurement device, especially a real-time online measurement device. The existing collimation measurement methods include datum indication method, laser collimation method, autocollimator method, wire drawing method and coordinate measurement method. Their common charac...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/26G01B21/22G01D18/00
Inventor 叶声华邾继贵
Owner TIANJIN UNIV
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