基于UWB的无线触发系统的设计与实现

Design and Implementation of Wireless Trigger System Based on UWB

摘要:

为了获取炮弹落地前后的动作信息，同时为了克服手动预触发高速摄像机的不稳定性及存在的延时和记录完整性问题，以及内触发丢失信息的缺点，设计了基于UWB模块的无线触发系统。该系统以FPGA作为UWB模块的核心控制器，射频芯片DW1000为UWB模块核心，在炮弹与地面站分别放置UWB模块作为标签，通过TOA测距算法精确计算出两点距离，当小于给定距离时给出触发信号，实现高速摄像机的提前触发。对测距系统进行静态误差测量与靶场试验，静态误差在20cm~40cm，靶场试验时给定距离300米，测试结果分别为291.34m，288.48m，293.27m。实验结果表明，该触发系统可以完成预触发，满足炮弹记录实验的预触发需求。

Abstract:

In order to obtain the action information before and after the shell lands, and to overcome the instability, delay and record integrity problems of the manual pre-trigger high-speed camera, as well as the shortcomings of internal trigger loss information, a wireless trigger system based on UWB module was designed. This system takes FPGA as the core controller of UWB module, and RADIO frequency chip DW1000 as the core of UWB module. UWB modules are respectively placed as labels in artillery shells and ground stations. The DISTANCE between two points is accurately calculated through TOA ranging algorithm, and the trigger signal is given when the distance is less than a given distance, so as to realize the early trigger of high-speed cameras. Static error measurement and range test were carried out for the ranging system. The static error was between 20cm and 40cm. The range test was given a distance of 300 meters, and the test results were 291.34m, 288.48m and 293.27m, respectively. The experimental results show that the trigger system can complete the pre-trigger and meet the pre-trigger requirement of the shell recording experiment.