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气阀是燃气表的核心部件,气阀配合面三维形貌与燃气表密封性有重要关系。借助高精度二维定位平台与立柱支架,采用二维激光扫描的方式,在LabVIEW软件编程环境下调用动态链接库,实现了二维定位平台和立柱支架的平稳升降的控制,以及2D激光位移传感器的轮廓数据采集;实现了气阀配合面的二维与三维表面粗糙度参数的评定。结果表明,气阀密封性合格与否的二维与三维阈值分别为1.3mm和1.6mm,三维阈值判断比二维阈值判断更具全局性和准确性。通过测量气阀配合面三维形貌,可更加准确地判断其密封性合格与否,对工业零部件密封性检测具有一定的指导作用。
Gas valve is the core of the gas meter parts, valve surface with three-dimensional shape and gas meter seal has an important relationship. With the help of high-precision two-dimensional positioning platform and column bracket, a two-dimensional laser scanning method is adopted to call the dynamic link library under the LabVIEW software programming environment to realize the smooth lifting control of the two-dimensional positioning platform and the column bracket as well as the 2D laser displacement sensor Of the contour data acquisition; to achieve the valve with the two-dimensional and three-dimensional surface roughness of the evaluation parameters. The results show that the two-dimensional threshold and three-dimensional threshold of valve sealing are 1.3mm and 1.6mm, respectively. The three-dimensional threshold is more comprehensive and accurate than the two-dimensional threshold. By measuring the valve surface with the three-dimensional morphology, can be more accurately determine whether the seal of qualified or not, the detection of industrial parts has a guiding role in sealing.