An online glass tube defect detection system and method
A detection system and glass tube technology, applied in measurement devices, material analysis by optical means, instruments, etc., can solve the problems of complex detection hardware devices and software processing, etc.
Active Publication Date: 2017-05-17
HEBEI INST OF LASER
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Problems solved by technology
The speed of online tube pulling can reach 3-5 m / s. To identify glass tube defects such as stones, streaks or boils under high-speed movement, it may be necessary to use one or more high-speed area array cameras and corresponding detection hardware. Device and software processing is also more complicated
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Embodiment Construction
[0016] Hereinafter, an on-line glass tube defect detection method and device according to the present invention will be described with reference to the accompanying drawings:
[0017] The principle of the detection method of the on-line glass tube defect that the present invention adopts is as figure 1 As shown, the parallel backlight 1 and the line scan camera 2 are placed on both sides of the glass tube 4. The parallel backlight 1 emits parallel light 3 , and the glass tube 4 is located in the area of the parallel light 3 . The light emitting surface 7 of the parallel backlight is parallel to the line camera 2 . The line camera 2 faces the parallel backlight 1 and is perpendicular to the glass tube 4 . The area where the parallel light 3 is blocked by the glass tube 4 shows a low level on the output signal of the line camera 2 . Based on the focusing effect of the lens, defects such as stones and stripes and the surrounding glass tissue form focused bright spots or brig...
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The invention relates to an online glass tube defect detection system, which includes at least two groups of detection devices and a detection control host, each group of detection devices includes a parallel backlight source, a line array camera and a detection electronic unit, and the line array camera faces the parallel backlight source , and perpendicular to the moving direction of the glass tube; the signal output by the line scan camera is sent to the detection electronic unit; the detection electronic unit is used to detect the signal in the target area determined by the measurement range of the line scan camera according to the preset threshold level Perform binarization processing to obtain pulse signals, judge whether there are defects in the glass tube passing through the detection area according to the pulse signals, and send the judgment results to the detection control host; the installation angles of each group of detection devices on the production line are different. The present invention also provides a detection method adopted by the above detection system. The invention has the advantages of low cost, fast and accurate on-line detection of glass tube defects.
Description
technical field [0001] The invention belongs to the technical field of glass quality detection, and in particular relates to a detection method for on-line glass tube defects and a corresponding detection device. Background technique [0002] Stones, streaks, etc. are common glass defects in the production process of glass drawn tubes. There are different reasons for the formation of stones. Usually, the source of stones is attributed to insufficient melting of batch materials, erosion of refractory materials by molten glass, crystallization and retention of volatile matter. The presence of stones, streaks, etc. is extremely harmful and is the most dangerous defect in the vitreous. These defects seriously destroy the uniformity, light transmittance, electrical properties and thermal shock resistance of glass products. The expansion coefficient of the stone part is different from that of the surrounding glass, and the local stress generated by it greatly reduces the mechani...
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IPC IPC(8): G01N21/958
Inventor 徐新军章钦张华山张国宏袁会敬
Owner HEBEI INST OF LASER