基于千兆以太网的多通道冲击波超压系统设计

Design of multi-channel shockwave overpressure system based on gigabit Ethernet

文中针对坑道现场高速读取大量冲击波超压数据的需要,设计一种千兆以太网接口的多通道冲击波超压测试系统,重点对系统中千兆以太网数据传输技术进行研究。系统以FPGA作为控制核心,设计千兆以太网模块的电路、物理层的地址解析协议以及数据链路层的用户数据报协议并进行实现,完成了高速数据传输;同时利用8位数据并行输入的CRC-32校验算法解决大量数据在传输时出现的误码现象,提高了千兆以太网高速传输的数据准确性。数据传输测试验证了系统在传输数据过程中的逻辑性,数据读取速度有大幅改善。两次坑道爆炸试验说明系统具有可靠性,可为坑道的冲击波超压测试提供更好的解决方案。

In allusion to the need of high-speed reading a large number of shockwave overpressure data in tunnel site,a multi-channel shockwave overpressure testing system of gigabit Ethernet interface is designed,and a study with the emphasis on the data transmission technology of gigabit Ethernet in the system is carried out. In the system,FPGA is used as control core,and the circuit,the address resolution protocol of physical layer and the user datagram protocol of data link layer are designed and realized for the gigabit Ethernet module,so as to complete the high-speed data transmission. The CRC-32 check algorithm with 8-bit data parallel input is used to eliminate the error code phenomenon of a large number of data during transmission,and improve the data accuracy of high-speed transmission of gigabit Ethernet. The testing result of data transmission verifies the logicality of the system in the process of transmitting data,and the great improvement of data reading speed. Two tunnel explosion tests show that the system is reliable and can provide a better solution for the shockwave overpressure test in the tunnel.