【摘要】 设计了基于虚拟仪器的锁相放大器远程实验的软件系统,用LabVIEW软件编写了客户机与实验机程序,实现了串口与单片机系统的通信、声卡采集信号、TCP/IP网络通信等功能。用Linux中的IPtables防火墙技术实现实验机与服务器间的端口映射,使得互联网上的所有用户可以通过服务器访问实验机,进行远程实验。更多还原

【Abstract】 The lock-in-amplifier(LIA) remote experiment system based on the virtual instrument was designed.The programs for the client computers and the experiment computer were written with virtual instrument software LabVIEW.And various functions were realized,including communication with the signal chip microcomputer(SCM) through the serial port,real-time acquisition of the voltage by the LIA via the sound card and Internet communication by using TCP/IP technology.The port mapping between the experiment computer and the server was realized with Iptables Netfilter technology in Linux system.So all the users in Internet can accomplish the remote experiment via visiting the experiment computer through server.更多还原