针对以前螺杆泵的出厂测试是传统的传感器和智能仪表的简单连接、人工采集数据处理的情况,设计开发了基于PLC的测试实验台。在这个系统中,PLC通过Profibus-DP通信协议来实现对泵电机的变频调速,应用WinCC组态软件实现上位机对测试过程...针对以前螺杆泵的出厂测试是传统的传感器和智能仪表的简单连接、人工采集数据处理的情况,设计开发了基于PLC的测试实验台。在这个系统中,PLC通过Profibus-DP通信协议来实现对泵电机的变频调速,应用WinCC组态软件实现上位机对测试过程的实时监控和远程控制,通过智能仪表和红外转速测量仪实现数据的实时采集,除此之外还利用SQL Server 2005、Excel等软件实现数据的存储和报表。实践表明,该实验台操作简单、灵活方便、实用性强,大大提高了测量精度,减少了操作人员的工作量。展开更多
The performance of masonry walls reinforced using innovative polymer grids embedded into thin plaster layers as a tool for the seismic enhancement of brick masonry buildings has been investigated by experimental tests...The performance of masonry walls reinforced using innovative polymer grids embedded into thin plaster layers as a tool for the seismic enhancement of brick masonry buildings has been investigated by experimental tests. A number of diagonal compression, shear compression and out-of-plane tests were executed on sample panels; experimental activities included pseudo-dynamic and shaking table tests on infills and reduced scaled building mock-ups, respectively. The results of the experimental activities are presented and discussed. Experimental campaigns have been supported by theoretical and numerical investigations; based on the experimental data and on the results of detailed numerical simulations, simplified models for the design of the retrofitting intervention are hereinafter proposed. The models：, calibrated on the experimental evidence, properly consider the collapse mechanisms as well as the grid effect in the evolution of the above mentioned mechanisms.展开更多
文摘针对以前螺杆泵的出厂测试是传统的传感器和智能仪表的简单连接、人工采集数据处理的情况,设计开发了基于PLC的测试实验台。在这个系统中,PLC通过Profibus-DP通信协议来实现对泵电机的变频调速,应用WinCC组态软件实现上位机对测试过程的实时监控和远程控制,通过智能仪表和红外转速测量仪实现数据的实时采集,除此之外还利用SQL Server 2005、Excel等软件实现数据的存储和报表。实践表明,该实验台操作简单、灵活方便、实用性强,大大提高了测量精度,减少了操作人员的工作量。
文摘The performance of masonry walls reinforced using innovative polymer grids embedded into thin plaster layers as a tool for the seismic enhancement of brick masonry buildings has been investigated by experimental tests. A number of diagonal compression, shear compression and out-of-plane tests were executed on sample panels; experimental activities included pseudo-dynamic and shaking table tests on infills and reduced scaled building mock-ups, respectively. The results of the experimental activities are presented and discussed. Experimental campaigns have been supported by theoretical and numerical investigations; based on the experimental data and on the results of detailed numerical simulations, simplified models for the design of the retrofitting intervention are hereinafter proposed. The models：, calibrated on the experimental evidence, properly consider the collapse mechanisms as well as the grid effect in the evolution of the above mentioned mechanisms.
