蔡泽利+谭振江

摘 要： 在物联网环境下进行无线节点自动监控数据采集，提高数据检测和诊断分析能力，提出基于动态增益控制和DSP高速信号处理的物联网智能无线节点自动监控数据采集系统设计方法。基于微机总线技术进行无线节点自动监控数据采集系统的总体设计，系统主要包括DSP处理器和PCI总线两大功能模块设计，数据采集的传感器基阵由多传感信息融合的无线监测节点组成，设计收发转换电路和功率放大电路实现采集数据的信号放大和数/模转换。采用动态增益控制方法实现采集数据的放大和滤波处理，基于DSP信号处理器进行自动监控数据采集系统的集成设计。测试结果表明，采用该系统进行物联网智能无线节点自动监控数据采集，能实现持续的大于15 MB/s的实时数据采集和记录，总线持续数据传输速率超过20 MB/s，峰值传输速率也可超过33 MB/s，满足实时记录无线节点自动监控数据的需求。

关键词： 物联网； 无线节点； 监控数据； 采集系统； DSP； 数模转换

中图分类号： TN915?34； TN911 文献标识码： A 文章编号： 1004?373X（2018）04?0183?04

Abstract： The automatic monitoring data acquisition of wireless nodes under the environment of Internet of Things （IoT） can improve the capability of data detection and diagnosis analysis. Therefore， a dynamic gain control and DSP high?speed signal processing based design method of automatic monitoring data acquisition system for IoT intelligent wireless nodes is proposed. During the overall design of automatic monitoring data acquisition system for wireless nodes based on the computer bus technology， two functional modules of DSP processor and PCI bus are designed. The sensor array of data acquisition is composed of multi?sensor information fused wireless monitoring nodes. The transceiver circuit and power amplifier circuit are designed to realize signal amplification and digital?to?analogue conversion （DAC） for data acquisition. The dynamic gain control method is used to achieve the amplification and filtering of data acquisition. The integrated design of automatic monitoring data acquisition system based on DSP signal processor is performed. The test results show that the system for automatic monitoring data acquisition of IoT intelligent wireless nodes can realize over 15 MB/s continuous real?time data acquisition and recording， with the continuous data transmission rate of the bus higher than 20 MB/s， and the peak transmission rate higher than 33MB/s， which can meet the requirement of real?time recording of automatic monitoring data for wireless nodes.

Keywords： IoT； wireless node； monitoring data； acquisition system； DSP； DAC

0 引 言

研究物聯网智能无线节点自动监控数据采集系统的优化设计方法，在信号检测、计量、测控等领域具有广阔的应用前景。传统方法设计物联网监控数据数据采集系统存在数据采集实时性不好，不适用于外场测试、现场检测等应用需求，需要进行系统改进设计[1]。对此，提出基于动态增益控制和DSP高速信号处理的智能无线节点自动监控数据采集系统设计方法，并进行系统测试分析，得出有效性结论。……