Crossed grating stuck to metal surface was used as a strain sensor in the present work, and stress as well as strain were then investigated by accurately determining the change in the position of diffraction spot befo...Crossed grating stuck to metal surface was used as a strain sensor in the present work, and stress as well as strain were then investigated by accurately determining the change in the position of diffraction spot before and after deformed. A hardware testing system for linear CCD array, data gathering and processing was therefore developed for this purpose. Experimental results showed that the system has a good accuracy and can be used to measure stress and strain of metal surface in a real-time and quantitative manner.展开更多
介绍了利用美国国家仪器有限公司(简称NI:National Instruments)的软件LabVIEW和硬件高速定时器/计数器,以及含步进电机的CCD线阵列式位置传感器支架来实现的磁悬挂天平MSBS(Magnetic Suspension and BalanceSystem)导航控制系统,其中...介绍了利用美国国家仪器有限公司(简称NI:National Instruments)的软件LabVIEW和硬件高速定时器/计数器,以及含步进电机的CCD线阵列式位置传感器支架来实现的磁悬挂天平MSBS(Magnetic Suspension and BalanceSystem)导航控制系统,其中主要包括它的俯仰、左右和平动方向的导航控制。磁悬挂天平是进行风洞实验的理想装置,其基本核心技术之一就是进行导航控制。该系统基于LabVIEW7.0平台进行编程,具有操作界面友好直观、导航控制精度高、便于扩展等特点。磁悬挂天平导航控制系统是“30cm×30cm磁悬挂天平装置”及“30cm×30cm低速高品质气流风洞装置”的重要组成部分。展开更多
文摘Crossed grating stuck to metal surface was used as a strain sensor in the present work, and stress as well as strain were then investigated by accurately determining the change in the position of diffraction spot before and after deformed. A hardware testing system for linear CCD array, data gathering and processing was therefore developed for this purpose. Experimental results showed that the system has a good accuracy and can be used to measure stress and strain of metal surface in a real-time and quantitative manner.
文摘介绍了利用美国国家仪器有限公司(简称NI:National Instruments)的软件LabVIEW和硬件高速定时器/计数器,以及含步进电机的CCD线阵列式位置传感器支架来实现的磁悬挂天平MSBS(Magnetic Suspension and BalanceSystem)导航控制系统,其中主要包括它的俯仰、左右和平动方向的导航控制。磁悬挂天平是进行风洞实验的理想装置,其基本核心技术之一就是进行导航控制。该系统基于LabVIEW7.0平台进行编程,具有操作界面友好直观、导航控制精度高、便于扩展等特点。磁悬挂天平导航控制系统是“30cm×30cm磁悬挂天平装置”及“30cm×30cm低速高品质气流风洞装置”的重要组成部分。