说明：  基于UP、UPF、CRPF的WSN目标跟踪算法，然后对 其基于CRPF的目标跟踪过程进行描述。
(Based on the characteristics of low cost,low power,small size,high redundancy and multi-function,it is more convenient,more reliable and more effective for WSN to apply to target tracking than traditional system.)