设计制作一套无线识别装置。该装置由阅读器、应答器和耦合线圈组成，其方框图见图1。阅读器能识别应答器的有无、编码和存储信息。阅读器应答器耦合线圈外接单电源-Design of a wireless identification device. The device consists of readers, transponders and coupling coils, which block diagram shown in Figure 1. Transponder reader can i