作者：胡晓峰1, 王红亮1, 彭晴晴2
作者单位：1. 中北大学 电子测试技术国家重点实验室, 山西 太原 030051;
2. 中国兵器工业集团第207研究所, 山西 太原 030051
关键词：数据采集;通道扩展;级联;低压差分信号
摘要：
为实时采集飞行器舱体各部位的振动、冲击、压力等多路信号，设计一种通道可自由扩展的级联式机载数据采集系统。以FPGA为核心控制器设计基础模块和传感器采集模块，通过将多个采集模块堆叠级联的方式实现对任意通道的扩展。采集模块内置信号调理和采集电路、存储和控制电路，采集数据按通道编帧后分层存储。基础模块通过级联总线发送触发或读数指令，控制采集进程，并利用LVDS电缆将数据上传到计算机进行波形分析。实际测试表明：该系统能根据应用需求灵活扩展通道数量，同步采集时单通道采样率300 kS/s，电压转换误差＜0.2%，具备体积小、易维护等特点。
Design of extension cascade airborne data acquisition system
HU Xiaofeng1, WANG Hongliang1, PENG Qingqing2
1. National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, China;
2. Chinese Ordance Industry Group 207 Research Institute, Taiyuan 030051, China
Abstract: A cascade airborne data acquisition system with extended channels was designed for real-time acquisition of vibration, shock and pressure signals from various parts of aircraft cabin. The basic module and sensor acquisition module applied FPGA as the core controller, and the extension of any channel was realized by stacking modules in a stack. Acquisition module was built with signal conditioning and acquisition circuit, storage and control circuit, and the data was stored by layer in frame of channels. Basic module transmitted the trigger or read instruction via cascade bus to control the acquisition process, and uploaded data to the computer for waveform analysis through LVDS cable. The test shows that the instrument could extend the number of channels flexibly according to the application requirements. The single channel sampling rate was not less than 300 kS/s in synchronous acquisition, and voltage conversion error was lower than 0.2%, which had characteristics of small size and easy maintenance.
Keywords: data acquisition;channel extension;cascading;LVDS
2017, 43(6): 83-87 收稿日期: 2016-10-05;收到修改稿日期: 2016-11-16
基金项目: 国家自然科学基金项目（51425505）
作者简介: 胡晓峰(1990-),男,山西临汾市人,硕士研究生,专业方向为振动和冲击数据采集系统。
参考文献
[1] 霍朝晖, 魏建新, 覃燕. 飞行试验机载网络数据采集与分析技术[J]. 现代电子技术, 2011, 34(11):144-147.
[2] 向建军, 夏海宝, 许蕴山. 基于DSP的机载数据采集记录系统的设计[J]. 航空计算技术, 2011, 41(3):106-109.
[3] 胡海涛, 索涛, 李玉龙, 等. 飞机结构振动监测用微型测试系统研制[J]. 实验力学, 2014, 29(1):12-17.
[4] 田方正, 皇甫大宏, 沙永忠. 新一代机载数据采集系统的发展综述[J]. 测控技术, 2007, 26(3):16-18.
[5] 甄国涌, 郝晓鹏. 基于级联模式的多通道数据采集系统设计[J]. 自动化与仪表, 2011, 26(2):50-52.
[6] 孙克辉, 熊迁. 集成电路RFID芯片测试系统设计与实现[J].仪表技术与传感器, 2013(11):44-46.
[7] 赵亮, 刘先勇, 袁长迎, 等. 微弱信号调理电路的设计及研究[J]. 西南科技大学学报, 2010, 25(1):64-67.
[8] 曹恒, 秦颖颀, 王春, 等. 两线制IEPE传感器前置信号调理电路[J]. 仪表技术与传感器, 2012(11):160-162.
[9] 史志辉, 林君, 周逢道. 基于虚拟仪器的高准确度同步采集系统[J]. 中国测试, 2016, 42(2):67-70.
[10] 储成君. 基于FPGA的多通道模数混合采集装置的设计及实现[D]. 太原:中北大学, 2014.
[11] 张小军, 廖风强, 王录涛, 等. 多通道高速串行LVDS信号解串器设计[J]. 电子测量技术, 2013(4):63-67.
