在轴孔零件装配中,机器视觉检测起到特征识别与空间定位的作用,使用平行背光源能提高机器视觉检测的精度。但在孔零件出现小角度倾斜时,平行背光源的工程应用存在困难。针对这一问题,通过识别孔零件的内棱轮廓并分析图像特征,在零件倾斜角小于1°时,可快速确定零件倾斜角度与空间位置,克服了平行背光源的工程应用难点。实验结果表明,改进后的定位方法误差优于0.5%,可实现零件倾斜角小于1°时,同轴度要求10μm的轴
With the adjustment of urban industrial structure,a large number of ruins have emerged in cities,and the waste materials left by these ruins not only occupy urb
China is a united multi-ethnic country boasting a long history.All ethnic groups have jointly contributed to the development of their motherland.For thousands o
谐振腔发光二极管(Resonant Cavity Light-emitting Diode,RCLED)利用谐振腔改变自发辐射的空间分布,使其具有效率高、方向性好、光谱半宽窄及波长稳定等优点。基于AlGaInP材
Nowadays,the city’s focus on education makes the improvement of learning environment become a new demand for development.From the the perspective of ecology,th
MS.Huang,a Chongqing local,felt an unexpected chill one summer morning.“I[instinctively]knew I was going to catch a cold,”she said.Her response was to make an
在环境可控的密闭植物工厂内,将定植后的生菜全生育期均分为3个生长阶段,分别用苗期、生长前期和生长后期表示,每段7 d,共计21 d,研究了苗期(S1)、生长前期(S2)和生长后期(S3
Taking contents of Italian Renaissance gardens in the course Foreign Landscape Architecture History as an example,this paper introduces case teaching method and
2021年3月27日,通过内管注入、外管焊接、全管体热处理、内外管稳定同步生产等工艺验证,2000 m多通道连续钢构管,在中国石油宝鸡石油钢管有限责任公司下线,这是国内首盘最长
针对微光夜视系统仪光源模块照度均匀性差、光谱匹配度低和参数不可调整等问题,开展了一种基于μLED(微型LED阵列)的微光光源模拟技术研究。在实验室条件下,实现微光光源模拟