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通过分析气象数据采集系统的功能需求,确定了无线高精度温湿度智能传感系统总体设计方案,文章介绍了该方案的软硬件设计与实现。该系统以超低功耗ARM Cortex-M0架构的LPC1114为主控芯片,配合低功耗、16位串行A/D转换芯片AD7792以及超低功耗、具自动应答及自动重发功能的单片式2.4 GHz的无线射频芯片NRF24L01等实现无线通信、高精度测量、自动采集和实时处理等功能,它与现有气象数据采集器相比,具有体积小、功耗低、组网灵活和测量精度高等特点。实验测试结果表明,本智能传感器工作稳定可靠,并具有足够的精度,达到了预期的设计目标。
By analyzing the functional requirements of the meteorological data acquisition system, the overall design scheme of wireless high-precision temperature and humidity intelligent sensing system is determined. The software and hardware design and implementation of this scheme are introduced. The system uses the LPC1114 ultra-low power ARM Cortex-M0 architecture as the main control chip, with low power consumption, 16-bit serial A / D conversion chip AD7792 and ultra-low power consumption, with a single automatic reply and automatic retransmission Compared with the existing meteorological data collector, it has the advantages of small size, low power consumption, flexible networking and measurement. The chip 2.4 GHz wireless radio frequency chip NRF24L01 can realize wireless communication, high precision measurement, automatic acquisition and real-time processing. High precision. Experimental results show that the smart sensor is stable and reliable, and has enough accuracy to achieve the desired design goals.