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我国自主设计出的北斗卫星和zigbee授时系统很少,多数授时系统性能不达标。为此,使用激光测距数据对名为“北斗一号”的北斗卫星和zigbee的授时系统进行改进设计。其介绍了“北斗一号”授时系统的工作原理、授时方法和设计缺陷。使用Grubbs标准将激光测距数据与“北斗一号”授时系统的通信潜伏用时进行等价观测,给出嫌疑数据并调整嫌疑数据权值比重,提高授时精度。还使用具备自动追踪功能的YA16D125模数转换器替换了“北斗一号”授时系统的A/D芯片,给出多种模数转换模式,并向zigbee模块工作流程中添加了通信信息审查流程。实验验证结果表明,改进系统具有授时脉冲同步性能好、通信距离远的特点。
China independently designed Beidou satellite and zigbee timing system rarely, most of the timing system performance is not up to standard. To this end, laser ranging data is used to improve the timing system of Beidou satellite and zigbee named “Beidou No.1”. It introduces “Beidou on the 1st ” timing system working principle, timing methods and design flaws. Using Grubbs standard to make equivalent observation between the laser ranging data and the communication latent time of the “Beidou No.1” timing system, giving the suspect data and adjusting the weight proportion of the suspect data to improve the timing precision. The A / D chip in the “Beidou No.1” timing system was also replaced with the YA16D125 analog-to-digital converter with auto-tracking function to give a variety of A / D conversion modes and add communications to the zigbee module workflow Process. Experimental results show that the improved system has the characteristics of good timing synchronization and communication distance.