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为削弱和消除干扰对基于 GPS同步采样装置的影响 ,在简要介绍 GPS同步采样装置的基础上 ,根据秒脉冲总是位于 2 s交界处的特点 ,提出了防止干扰 GPS秒脉冲信号的软硬件措施。其中 ,软件鉴别法简单可行 ,适用于 CPU内部资源充足的情况下 ;而硬件措施节约了 CPU的片内资源 ,适用于 CPU负担较重的应用场合。试验结果表明 ,该方法可有效地克服干扰信号对 GPS同步采样装置的影响。
In order to weaken and eliminate the influence of interference on GPS-based synchronous sampling device, based on the brief introduction of GPS synchronous sampling device, the hardware and software measures to prevent the GPS second pulse from interfering with are proposed according to the characteristic that the second pulse always locates at 2 s . Among them, the software identification method is simple and feasible, suitable for the case of sufficient internal CPU resources; and hardware measures to save the on-chip CPU resources for CPU heavy load applications. Experimental results show that this method can effectively overcome the influence of interference signal on GPS synchronous sampling device.