一种堆肥自动控制系统软件的设计与模拟运行效果

Automatic control system for composting:software design and simulating operational effect

采用Microsoft Visual Basic语肓,结合Microsoft Access 8L Excel开发了一种堆肥自动控制系统软件(Temperature -Oxygen-Time,TOT)。软件可实现基于温度、排出气体含氧量和时间三因素对堆肥通风系统进行反馈式控制,最高报警温度、排出气体最低含氧量和阶段划分温度等均可自定义设置,堆肥温度、排出气体含氧量和pH值均可实时监测。系统每10 s刷新显示一次监测结果,每1h自动保存当前采集数据,利用Excel从数据库中读取数据方便对分析结果。模拟运行结果表明,软件能按照预定的要求控制风机开关,能正确计算和记录各个阶段和风机的运行时间,能有效地显示和保存数据。结合Excel,还能快捷地读取温度和含氧量的变化的数据、绘制其变化曲线。

A kind of automatic control software for composting was designed by using Microsoft Visual Basic com- puter language and tools including Microsoft Access & Excel.The software—TOT—can control aeration system of composting by temperature,oxygen content of the exhausted gas,and time.Maximum altering temperature, minimum oxygen content of the exhausted gas,and distinguished temperature of different phases can be set by us- ers.The composting temperature,oxygen content of the exhausted gas,and pH value can be monitored by the system.The results are refreshed per 10 s,and saved automatically per 1 h.The data can also be gathered from database and analyzed by using Microsoft Excel.The simulating operational results show that the system soft- ware can control fans according to the scheduled requirement,can calculate and record the phase and operational time of fans correctly,can display and save the data.In addition,the software can also read the data of compos- ting temperature and oxygen content of the exhausted gas,and draw the profiles of them.