舰载分布式数据记录仪系统设计

Design of miniaturized and distributed ship-based data recorder system

传统的舰体环境测试采用单一传感器或仪器获取数据，存在测试范围小、效率低、测试人员操作繁琐和工作量大等缺点。提出了基于FPGA及Real-Time实时操作系统的舰载小型化分布式数据记录仪设计技术，使用了模拟采集、数字输入输出组件及调理电路的模块化硬件，便于系统维护及功能扩展。设计了Real-Time上Ping-PangFIFO数据缓冲算法实现了低功耗处理板上高速大容量实时数据采集，最大可支持8通道，每通道100kS／s采样率；设计了FPGA底层的去抖延迟算法实现触发及同步信号的可靠传输，兼容信号高电平范围15～30VDC，触发及同步精度小于1ms，采用了基于主从结构的同步触发技术实现分布式多台记录仪的协同工作，且支持软件授时，授时精度误差小于150ms。低功耗（不超过8w）、防水（IP67）及耐盐雾等技术的应用，提高了记录仪工作的可靠性及稳定性，为舰体环境监测提供了及时可靠的数据参考。

A single sensor or instrument was used to obtain data in traditional ship environment test. , which had some disadvantages of imprecise, bad compatibility and too much working load. The testing technology of miniaturized and distributed data recorder system is mentioned based on FPGA and Real-Time operation system. The modularization hardware principle was applied to be repaired and extended conveniently in analog acquisition, digital input and output and signal conditioning circuit. The data buffer algorithm in Real-Time operation system and jitter elimination algorithm on FPGA were also promoted to solve the problems of high speed and high-capacity real time data produced by the acquisition process of 100 kS/s per channel when 8 channels working. It was provided the synchronous trigger technology of multi recorder based on master slave structure to realize the synchronous and trigger signal which was compatible of level 15-30 VDC transmission reliably and the accuracy was less than 1 ms. The synchronous trigger technology based on master slave structure is adopted to realize the cooperative work of distributed multi recorder. The system supported software timing service, which accuracy is less than 150 ms. Application of miniaturization, low power consumption（less than 8 W）, waterproof （IP67）and anti-corrosion technology was used to improve the reliability and stability of the data recorder, which was provided data reference for environmental monitoring of ship body timely and reliably.