The researchers who study the local area network( LAN) eXtension for instrumentation( LXI) instrument are pursuing instrument's high-precision synchronization. In the paper,three synchronization modes were discuss...The researchers who study the local area network( LAN) eXtension for instrumentation( LXI) instrument are pursuing instrument's high-precision synchronization. In the paper,three synchronization modes were discussed which were clock synchronization, trigger synchronization, and response synchronization. Synchronous process between LXI instruments was analyzed and each time factor affecting the synchronization accuracy was discussed. On the basis of the analysis,it can be found that delay trigger plays an important role in the network testing system's synchronization. Delay trigger can produce an additional time interval to correct the difference of each LXI instrument's response time. Then,a method to realize the delay trigger was introduced. Delay time can be adjustable according to the actual demand. Finally,synchronization accuracy of network testing system can reach nanoseconds.展开更多
文中简要介绍了某型雷达自动化检测设备的工作原理和主要结构组成特点。该套检测设备的设计核心是以计算机为主控中心,通过LXI(LAN-based e Xtensions for Instrumentation)总线,实现对测试资源的统一管理和配置,通过更换不同接口适配器...文中简要介绍了某型雷达自动化检测设备的工作原理和主要结构组成特点。该套检测设备的设计核心是以计算机为主控中心,通过LXI(LAN-based e Xtensions for Instrumentation)总线,实现对测试资源的统一管理和配置,通过更换不同接口适配器,就可以完成雷达各组成部分技术参数的自动化测试。该检测设备具有通用化、组合化、扩展性能强、检测过程快速直观、使用安全等特点,其成功研制为类似产品自动化检测设备的研制提供了一种有效的思路。展开更多
基金Sino-German Joint Research Project of the Sino-German Center for Science(No.GZ817)the Fundamental Research Funds for the Central Universities,China(No.ZYGX2012 J090)National Natural Science Foundation of China(No.61271035)
文摘The researchers who study the local area network( LAN) eXtension for instrumentation( LXI) instrument are pursuing instrument's high-precision synchronization. In the paper,three synchronization modes were discussed which were clock synchronization, trigger synchronization, and response synchronization. Synchronous process between LXI instruments was analyzed and each time factor affecting the synchronization accuracy was discussed. On the basis of the analysis,it can be found that delay trigger plays an important role in the network testing system's synchronization. Delay trigger can produce an additional time interval to correct the difference of each LXI instrument's response time. Then,a method to realize the delay trigger was introduced. Delay time can be adjustable according to the actual demand. Finally,synchronization accuracy of network testing system can reach nanoseconds.
文摘文中简要介绍了某型雷达自动化检测设备的工作原理和主要结构组成特点。该套检测设备的设计核心是以计算机为主控中心,通过LXI(LAN-based e Xtensions for Instrumentation)总线,实现对测试资源的统一管理和配置,通过更换不同接口适配器,就可以完成雷达各组成部分技术参数的自动化测试。该检测设备具有通用化、组合化、扩展性能强、检测过程快速直观、使用安全等特点,其成功研制为类似产品自动化检测设备的研制提供了一种有效的思路。
