结合无线通信技术和USB技术的优点,提出一种基于无线USB技术的数据采集系统。该系统运用高速转换器AD7874、USB接口芯片PDIUSBD12、89C51微处理器和射频收发器nRF401构建数据采集电路和无线USB接口。该设计成功取代有线数据采集系统复杂的连线,并且提高了数据采集的抗干扰性、灵活性。文中对无线A/D转换电路、无线USB接口的设计、89C51内部固件程序及USB应用程序编写进行了阐述。-Combination of wireless communications technology and the advantages of USB technology, a technology based on wireless USB data acquisition system. The system is the use of high-speed converter AD7874, USB interface chip PDIUSBD12, 89C51 microprocessor and RF transceiver nRF401 to build data acquisition circuit and wireless USB interface. The success of the design to replace the wired data acquisition system of complex connections, and improve the data acquisition antijamming, flexibility. Text of wireless A/D conversion circuit, a wireless USB interface design, 89C51 internal USB firmware application procedures and the preparation are described.