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基于单片机的木材表面粗糙度激光在线检测系统 总被引:1,自引:0,他引:1
介绍一种用单片机控制激光位移传感器进行在线检测木材机械加工表面粗糙度的新方法.该系统由单片机、模数转换器和激光传感器测量系统(激光头及激光控制器)等组成,试验在木材加工CNC装置上进行.文中给出了硬件结构及软件程序设计流程图. 相似文献
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采用由计算机,模数转换板(A/D板),激光传感器等组成的木材表面粗糙度在线检测系统,在CNC数控加工中心上对铣削加工的针叶材花旗松和阔叶材山毛榉进行了表面粗糙度RZ的在线检测。实验结果表明,该系统的检测数据是准确的,并具有高速在线测量等特点。 相似文献
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通过对木材表面粗糙度检测方法的研究,测量。以数字信号处理器(DSP)TMS320F240为核心,稳定和对被测件表面无损伤的优点。该系统工作可靠,提出采用光学探针法实现木材表面粗糙度的三维非接触实现对信号的测量及系统的控制,具有测量速度快、信号满足实时性要求,并具有很强的抗干扰能力。 相似文献
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浅谈国内外木材表面粗糙度的研究现状及发展趋势 总被引:7,自引:0,他引:7
从国内外木材表面粗糙度研究内容、研究方向、测量方法和手段等方面论述了木材表面粗糙度研究现状与最新成果,并对木材表面粗糙度研究的未来发展方向提出了一些建议。 相似文献
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《林业工程学报》2016,(5)
为使木材表面具备疏水性能,采用等离子体刻蚀并沉积亲水性类金刚石(DLC)薄膜的方法对糖枫木(Acer saccharum)进行表面改性研究,通过扫描电子显微镜(SEM)、激光扫描共聚焦显微镜(LSCM)、接触角测量仪、椭圆偏振光谱仪、X-射线光电子能谱仪(XPS),分析和表征了处理前后木材表面的微观形貌、粗糙度、润湿性能、沉积薄膜的厚度及元素组成和化学状态。结果表明:刻蚀时间小于30 min时,木材表面的平均粗糙度、均方根光洁度和高低差均随着刻蚀时间的延长逐渐增大;当刻蚀时间延长至45 min时,表面的粗糙度略有减小。木材表面的接触角随着刻蚀时间的延长先增大后减小,当刻蚀30 min并沉积DLC薄膜1.5 min时,接触角最大可达157.2°;而延长刻蚀时间至45 min时,其接触角为152.3°。相同的刻蚀时间下,木材表面的接触角随着DLC薄膜沉积时间的延长逐渐减小。通过计算,DLC薄膜的沉积速率为(51.7±4.5)nm/min;沉积DLC薄膜后,表面氧元素的含量明显减少,出现了石墨特征峰sp2-C和金刚石特征峰sp3-C。 相似文献
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本文叙述了使用双管显微镜和触针式木材表面粗糙度测量仅这两种仪器,对同一木材表面粗糙度的高度特征参数R_z、R_y进行测量,对取得的数据进行处理和分析比较,得出了在双管显微镜上也可进行木材表面粗糙度测量的结论,并提出了改进方案和新的设想。 相似文献
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1IntroductionThe surface roughness of wood is one of the important parameters that can be used to operate the automatic woodcutting machinery,and alsoto evaluatethe quality of products . Withthe development of computertechnology,automaticmeasurement methods of the machined surface roughness have been proposed.Inrecent years ,newnon_contact methodshave been studiedto measure the roughness of machined surfaces .For example ,ultrasonic sensor was usedto measuringsurface roughness(Blessinget al.,… 相似文献
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Zhao XuezengNortheast Forestry University 《林业研究》1992,3(1):75-81
The working processes,machining devices and tools,cutting amount,consumptionof materials,productivity and quality of products are directly affected wood surface roughness.This paper gives an extensive review of methods used previously to measure wood surfaceroughness,and concludes that computer vision is the most suitable.The preliminarystudy shows that computer vinon method has the advantages of a noncontact,three--dimensionalmeasurement,high speed and well correlates with stylus tracing method.The method can be usedin classification and in-time measurement of wood surface roughness after being improved. 相似文献
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The best methods for determining surface roughness in an industrial environment are of the noncontact variety, with reproduction of the profile. The objective of this work was to compare the roughness profile obtained by a contact stylus with a commercial laser displacement sensor (LDS). Measurements were done using 15 wood species with different densities and colors, based on which special triangle profiles were prepared. The accuracy of the laser sensor was examined by statistical analysis of roughness parameters measured from the profiles. Experimental results show that LDS profiles were imitated correctly. However, LDS accuracy depends on the scanned wood properties (density and color), installation position of the sensor, and profile shape. It was found that evaluation of dark and high-density wooden surfaces was imperfect.Part of this work was presented at the 50th Annual Meeting of the Japan Wood Research Society, Kyoto, April 2000; and at the 51st Annual Meeting of the Japan Wood Research Society, Tokyo, April 2001 相似文献
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The measurement of wood surface roughness is performed once the machining process is completed. It requires considerable time since the measurement is performed at slow speed. The objective of this study was to develop a method to evaluate the surface roughness of paper birch wood while routing. For this purpose, a number of transducers were mounted on the router spindle and also in the proximity of the workpiece and cutting zone. Signals were acquired during a wide range of cutting conditions and analyzed. Statistical regression and artificial neural networks were employed to establish relationships between the signals and the actual cutting depth and surface roughness. The sensor selection and the feasibility of the sensor placement were determined. The models were subjected to a validation procedure to confirm their performance. The placement of the microphone at constant distance from the cutting zone was determined to be the most useful one. A model able to predict the surface roughness of routed paper birch wood regardless of the depth of cut was produced. The performance of the model was valid independently of the length of the workpiece. 相似文献
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木质材料表面粗糙度光学付立叶测量方法的研究 总被引:2,自引:0,他引:2
阐述了木质材料表面粗糙度现有的测量技术与研究现状,研究了木质材料表面的统计模型和一维高斯型木质材料表面光学付立叶变换谱强度分布的模型,并得到了计算木质材料表面粗糙度均方根误差和自相关函数的数学公式。测量两个参数的实验系统,将具有非接触、高测量速度、测量不受被测材料影响和能得到比较多的轮廓信息等优点,进一步完善后,可用于木质材料表面粗糙度的分类检测及监控。 相似文献
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INTRODUCTIoNWoodsurfaceroughnessisaveryim-portantparameterforevaluatingsurfacemanufacturingquality.Sometimes,thellmitsofwoodsurfaceroughnessmustbegivenbeforemachined,becausewoodsur-faceroughnessdirectlyaffectspaintingandgluingqualityofwoodproductsandtheconsumptionofpaintmaterialsandgluingmaterials.Thesurfaceroughnessalsocanbeusedtoevaluatethequalityofma-chiningdeviceandtoolsandthesuitabilityofworkingprocesses.C0NSTRUCTIONOFMEASUREMENTSYSTEMConstructionof'themeasurementsys-temis… 相似文献
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Woodsurfaceroughnessisthemicrogeometrypropertycomposedbyalittlespacingandpeak-tovalley.Generallythesurfaceroughnesswascomposedbytheworkingmethodandotherfactorst123.Woodsurfaceroughnesswasnotonlyanimportantindexwhichmeasuredthesur-facesmoothextentofwoodproductandtheworkingqualitybutalsothewoodsur-fitceroughnessaffectedwoodsurfacefeel--lngandpsychologicalfeeling[3'4,lo,ll:.Th,'quantitativesurftlceproPertyparametersweretheimportantpartwhichmarkedthewoodsurfacevisualpsycho1ogicalmagni-tude,whichha… 相似文献