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基于計(jì)算機(jī)視覺的滾珠螺母形位誤差檢測
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    摘要:

    提出了基于計(jì)算機(jī)視覺的滾珠絲杠副螺母的形位誤差檢測方法。使用DH-HV3000FC型數(shù)字?jǐn)z像頭采集滾珠螺母的圖像，經(jīng)過IEEE1394數(shù)字接口卡傳輸?shù)接?jì)算機(jī)。對含有噪聲的原始數(shù)字圖像實(shí)施預(yù)處理、圖像分割及細(xì)化等處理，使圖像轉(zhuǎn)變成易于檢測的單像素寬邊緣信息。使用自編程序測量和計(jì)算螺母的圓度、圓柱度、滾道跳動及滾道對螺母外徑的同軸度，測量值分別為f1=8.34μm，f2=11.94μm，f3=1.76μm，f4=8.87μm。測量結(jié)果滿足滾珠螺母的形位公差要求，并分析了誤差的產(chǎn)生原因。理論分析及實(shí)驗(yàn)測量結(jié)果表明該方法正確可行。

    Abstract:

    A new kind of measurement method for ball nut was put forward, which was based on computer vision to measure shape and position errors of ball nut. Firstly, digital image of ball nut was collected by DH-HV3000FC device, and was input into computer by IEEE1394 digital card. Secondly, original gray level image with noise was changed into edge information with single-pixel width after it had been processed by pre-processing, image segmentation and thinning, etc. Thirdly, roundness, cylindricity, ball-way circular runout, concentricity of ball-way axis to the outside cylindrical axis of the ball nut were calculated and measured by compiled program. The value measured was respectively f1=8.34μm，f2=11.94μm，f3=1.76μm，f4=8.87μm. The value measured met the shape and position tolerance requirement of the ball nut. Lastly, the reason of error was analyzed. Theoretical analysis and experimental results showed that this method is feasible and correct.

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賀秋偉,王龍山,劉慶民,李國發(fā).基于計(jì)算機(jī)視覺的滾珠螺母形位誤差檢測[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2007,38(8):159-163.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(8):159-163.

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