8%。 The temperature and humidity monitoring and controlling system in a tunnel-type dryer was developed, based on supervisory control and data acquisition (SCADA) systems, industrial personal computer (IPC) and programmable logic controller (PLC). The customized IPC software of monitoring and controlling system monitors real-time temperature and humidity through the communication between IPC and PLC. The software functions realized drying processing parameters inputting, real-time data acquisition and displaying, dynamic and historical data curves, database inquiry and report forms printout. The accuracy of temperature and humidity controlling meets with the requirement of the drying room, with the maximum track error as 2℃ for temperature and 8% for relative humidity.
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韩清华,吴海华,叶金鹏,毛志怀,康泽,范云涛.果脯隧道式干燥机温湿度监控系统设计与试[J].农业机械学报,2010,41(4):119-123. and Controlling System of Temperature and Humidity for Tunnel-type Dryer[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(4):119-123