基于Cortex-M0的无线高精度温湿度智能传感器

摘要

The general design scheme of the wireless and highprecision temperature and humidity intelligent sensor is determined by the analysis of the functional requirements for meteorological data acquisition system.The overall scheme and realization of the hardware and software system are introduced in this paper.To realize the function of high accuracy measurement,automatic collection and real-time processing,we choose LPC1114 as the main control chip with ultra low power architecture of ARM Cortex-M0.This system also equips with the 16-bit serial A/D conversion chip AD7792 with low power consumption,and the 2.4 GHz single chip of radio frequency NRF24L01 with automatic response and automatic retransmission.Compared with existing meteorological data collector,the new one is of smaller volume,low power consumption,flexible network and higher measuring precision.The test results show that this intelligent sensor is stable,reliable,and high accuracy,which acieves the expected design target.%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。