杨帆 刘智

摘  要：针对我国城市果蔬配送过程中对于车载环境难以实时监控、配送损耗大的问题，研究了基于ZigBee的车载果蔬监控系统。系统主要由传感器模块、协调器模块、电源模块和现场显示部分构成，传感器模块主要由多个温湿度传感器构成，协调器模块使用CC2591芯片与CC2530芯片相连，并为CC2591芯片设计了新的巴伦电路增强传输增益，电源模块使用太阳能-锂电池双能供电。系统采用ZigBee技术组网，将传感器所采集的数据经协调器处理转发至驾驶室LCD显示屏，根据果蔬需求温湿度，通过继电器控制风机和雨淋阀。冷藏车的规格长约7.2米，宽约2.3米，高约2.7米，设计的系统完全满足实际需求，实现对车载环境温湿度的实时控制。

关键词：果蔬配送;传感器;ZigBee

Abstract：In view of the difficulty in real-time monitoring of on-board environment and large distribution loss in the process of urban fruit and vegetable distribution in China，the ZigBee-based on-board fruit and vegetable monitoring system is studied. System is mainly composed of sensor module，the coordinator module，power module and the display parts，sensor module is made up of multiple temperature and humidity sensor，the coordinator module uses CC2591 chip connected with CC2530 chip，and designed for the CC2591 chip enhanced transmission gain new balance circuit，power supply module using solar-lithium battery can double power supply. The system uses ZigBee technology to form a network. The data collected by sensors are processed by coordinator and forwarded to the LCD display panel of cab. According to the temperature and humidity of fruit and vegetable，the fan and rain valve are controlled by relay. The specifications of the refrigerated vehicle are about 7.2 meters long，2.3 meters wide and 2.7 meters high. The designed system fully meets the actual needs and realizes the real-time control of the temperature and humidity of the vehicle environment.

Keywords：fruit and vegetable distribution;sensor;ZigBee

0  引  言

隨着我国经济的快速发展，果蔬配送已然成为了现代城市居民新的现实需求。以武汉市为例，果蔬用量稳定增长，2018年前三季度果蔬用量达到了599.67万吨。蔬菜属于鲜活易坏产品[1]，对于运输环境的要求比较高。目前我国物流配送企业在果蔬配送上以货车冷链配送为主，但由于配送体系建设尚未完善，在配送过程中的损耗高达25%-30%[3]。徐安琪[2]等人提出加强技术支撑，提升果蔬在配送中的储存和保鲜水平，但没有给出具体的技术方案。针对我国果蔬配送业配送损耗大的问题，设计了基于ZigBee的蔬菜车载果蔬监控系统，将多个传感器节点置于车厢内，通过ZigBee自组网将所采集的车厢温湿度信息上传至驾驶室的LCD显示屏，在配送过程中根据实际情况控制风机和雨淋阀的开关，从而达到实时调控车厢环境、减少运输损耗的目的。……