柱状田头菇茶新菇

检查医用药瓶的几何尺寸和形状。瓶颈高度, 外部高度、锥度、柱状体的长度 . 表面角度和其它特殊尺寸要求 . 小圆弧的测量光学和接触复合传感器测量。行业定制专用夹具，定制化的测量报告影像测量仪，固定桥式结构，提供高精度，效率高的测量操作。广泛应用于手机、PCB、平板电脑、半导体、医疗、模具、汽车等行业。

The rod-airfoil con痝uration is a benchmark test case for aeroacoustic assessments of vortex-structure interaction noise. Several industrial devices are arranged in such a way that down-stream bodies are embedded in the wake of upstream bodies, such as gas turbines, high liftdevices, helicopters among others. Aeroacoustic predictions usually rely on time dependent皁w 痚ld information obtained from CFD for the determination of the aeroacoustic sources.The present work proposes a novel approach for the aeroacoustic prediction of rod-airfoil noisebased on time-resolved PIV experimental data.The aeroacoustic emission of a NACA0012 airfoil in the Karman wake of a rod is investigatedby means of 2D TR-PIV in combination with beamforming and microphone measurements.First the time evolving velocity 痚ld around the airfoil is measured using high-speed PIV.The corresponding pressure 痚ld is then deduced by spatial integration of a Poisson-basedalgorithm for quasi-2D incompressible 皁ws. Pressure and velocity computed on speci痗surfaces around the airfoil constitute the source terms of the implemented Curle's and FfowcsWilliams-Hawkings's aeroacoustic analogies. The calculated Sound Pressure Level (SPL) iscompared with the measurements obtained by far 痚ld microphones. Velocity visualizationsin the spanwise direction provide qualitative information about the phase coherence of thevortical impingement along the airfoil span. Parametric studies are performed to evaluate thee甧ct on the acoustic prediction of the position of the integration surface and the numericaldiscretization methods employed.

为什么需要评估产品的形状？工业产品实际上难以完全按照设计进行制造。因为金属及树脂等物质具有塑性及弹性等材质特性。即使技术人员设计的产品形状理想，实际生产出的产品也会由于某种原因而发生形状误差。要追查误差的原因，就需要正确掌握产品的形状变化。基恩士高精度三维扫描测量仪VL系列可以做到：1、对没有图纸的模具进行逆向工程2、叠合试制品的扫描数据和CAD，可将整体失真及与设计数据的差异可视化3、设定分析模板，可快速对产品进行出货检查，测量样品，无需重复设置......