【摘要】 为了避免旋转扫描过程中加载装置压力传感器外接连线带来的缠绕和遮挡问题,基于ARM技术和WiFi技术给出了一种无线数据采集方案,实现了工业CT原位加载扫描实验中加载装置压力信号的实时采集。整个采集系统由下位机、无线路由器、上位机三部分组成。下位机安装在加载装置上,采用ARM系统搭建,电池供电。压力变送器信号经调理后通过ARM主控芯片模拟输入端采集。利用WiFi模块与路由器通过无线连接,路由器再与上位机通过网线连接,从而实现下位机与上位机的P2P网络连接。数据传输采用UDP协议,自定义数据包格式中包含了采样时间和各通道A/D数据。上位机放置于CT监控室,接收网络UDP数据包,解析数据后进行显示和存储。实验测试结果表明,该系统工作稳定可靠,操作方便直观,完全满足静态加载的数据采集需求。更多还原

【Abstract】 In order to avoid the problem of entanglement and shielding caused by external connection of pressure sensor of loading device during rotating scanning,a wireless data acquisition scheme based on ARM technology and WiFi technology is proposed,which realizes the real-time acquisition of pressure signal of loading device in industrial CT in-situ loading scanning experiment. The whole acquisition system is composed of slave computer,wireless router and upper computer. The lower computer is installed on the loading device,which is built with ARM system and powered by batteries. After conditioning,the signal of pressure transmitter is collected by the analog input terminal of arm main control chip. The WiFi module is used to connect with router through wireless connection,and router is connected with upper computer through network cable,so as to realize P2P network connection between lower computer and upper computer. The UDP protocol is adopted for data transmission,and the format of customized data packet includes sampling time and A/D data of each channel. The upper computer placed in the CT monitoring room receives the network UDP packets,analyzes the data and displays and stores them. The experimental results show that the system is stable and reliable,and easy to operate. It fully meets the data acquisition requirements in static loading test.更多还原