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Method and device for measuring external diameter of heavy-calibre seamless steel pipe on line by using CCD (Charge Coupled Device) cameras

A technology of seamless steel pipe and camera, applied in the field of automation instrumentation

Inactive Publication Date: 2011-05-25
天津市核人仪器设备有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method and device for online measurement of the outer diameter of large-diameter seamless steel pipes using a CCD camera

Method used

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  • Method and device for measuring external diameter of heavy-calibre seamless steel pipe on line by using CCD (Charge Coupled Device) cameras
  • Method and device for measuring external diameter of heavy-calibre seamless steel pipe on line by using CCD (Charge Coupled Device) cameras
  • Method and device for measuring external diameter of heavy-calibre seamless steel pipe on line by using CCD (Charge Coupled Device) cameras

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Embodiment Construction

[0039] The intelligent camera for measuring the outer diameter of large-diameter seamless steel pipe applies the principle of binocular vision to the online measurement of the outer diameter of large-diameter seamless steel pipe

[0040] Technical scheme of on-site calibration method calling Matlab interpolation function

[0041] Large-diameter seamless steel pipe outer diameter online measurement system such as figure 1 shown.

[0042] A device for online measurement of the outer diameter of large-diameter seamless steel pipes using a CCD camera, which is characterized in that: two CCD cameras are respectively arranged above the rolling line of the large-diameter seamless steel pipe, and respectively above the rolling line of the large-diameter seamless steel pipe. Set up two background light boxes, two CCD cameras are respectively matched with the two background light boxes, the two CCD cameras and the two background light boxes are installed on the measurement frame, and t...

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Abstract

The invention discloses a device for measuring the external diameter of a heavy-calibre seamless steel pipe on line by using CCD (Charge Coupled Device) cameras. Two CCD cameras are respectively arranged above a rolling line of the heavy-calibre seamless steel pipe; two background light boxes are respectively arranged above the rolling line of the heavy-calibre seamless steel pipe; two CCD cameras are respectively matched with two background light boxes; two CCD cameras and two background light boxes are arranged on a measuring frame; two CCD cameras and two background light boxes are respectively connected with spot operation boxes; the spot operation boxes are connected with RS-422 communication cables or fibers; the RS-422 communication cables or fibers are connected to an industrial control machine of a central station; and the measuring frame is provided with a cooling circulation water system and a compressed air pipeline as well as a 220V alternating current power conditioner. In the invention, an intelligent camera for measuring the external diameter of the heavy-calibre seamless steel pipe applies the binocular vision principle to on-line measurement of the external diameter of the heavy-calibre seamless steel pipe.

Description

technical field [0001] The invention belongs to the field of automatic instruments, and in particular relates to a method and a device for online measuring the outer diameter of a large-diameter seamless steel pipe by using a CCD camera. It is mainly used in the large-diameter seamless steel pipe rolling production line to detect the outer diameter of the steel pipe in real time online. Background technique [0002] At present, the online diameter measurement technology for small-diameter steel pipes (below 30mm) is relatively mature. It is based on the measurement principle of the telecentric optical path, which can eliminate the influence of the position change of the measured object. However, this method is no longer suitable for measuring the outer diameter of large-diameter steel pipes (80-1000mm). The method of measuring the diameter of large-diameter steel pipes is generally: through the optical lens, the steel pipe is horizontally imaged on the surface of the CCD e...

Claims

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Application Information

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IPC IPC(8): B21B38/04G01B11/08
Inventor 薛俊生张敬韦锦华贺保民李丽尹旭超
Owner 天津市核人仪器设备有限公司
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