低温食品运输过程环境监测系统研究

针对低温食品在运输过程中因温度过高引起变质而又难于实时监测的问题,运用RFID、WSN、GPS和GPRS技术,设计了由智能节点、数据采集端、RFID标签、监控管理平台和移动客户端组成的低温食品运输过程环境监测系统,着重设计了智能节点和数据采集端的硬件结构及其软件工作流程,并给出了监控管理平台和移动客户端的功能,研制了系统实验装置,对低温食品冷藏车运输过程中车厢内温、湿度和车辆位置信息进行实时监测,一旦监测到温、湿度异常能马上进行短信报警,从而确保食品的质量安全。实验测试结果表明,系统能获取低温食品运输过程中的温、湿度和地理位置信息,并将数据存储到服务器的数据库中,当监测到温度阈值时,及时地进行短信报警,能满足低温食品运输过程环境监测的要求。

Environmental monitoring system for low-temperature food transport

Aiming at high temperatures caused food spoilage during low-temperature food transport,but it is difficult to design the realtime system to monitor the temperature.A low-temperature food transport environmental monitoring system was proposed based on RFID,WSN,GPS and GPRS technology,which was included intelligent nodes,data collection terminal,RFID tags,monitoring and management platform,and mobile app client.It was focused on the design of intelligent nodes,data collection terminal hardware structure and software workflow.The functionality of monitoring and management platform,and the mobile client app were finished.An experimental apparatus system was developed to achieve real-time monitoring of temperature,humidity and vehicle location information for low-temperature food refrigerated trucks during transport.The alarm messages were immediately sent to the mobile phone when the system detected abnormal temperature and humidity.The test results show that the system could get the humidity and geographic location information of the lowtemperature food during their transport,and the alarm SMS is sent when the temperature reached the threshold.This design can meet the requirements of low-temperature food transport environmental monitoring.