目录
 

绪论------------------------------------------------------------------------------------------------------

1课题来源及目的..........................................................................................................1

课题意义......................................................................................................................1
国内外发展状况..........................................................................................................2
本课题的设计要求......................................................................................................3
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2
3

苹果分级系统总体设计
2.1 机械系统设计..............................................................................................................
2.2 电气控制系统设计思路..............................................................................................
2.3 小结..............................................................................................................................
输送系统的设计计算-----------------------------------------------------------------------------
3.1 第一级输送带的设计..................................................................................................
........................................................................................
 

第二级输送带的设计计算
输送链的设计计算....................................................................................................
输送链的传动机构设计计算....................................................................................
分级执行系统的设计................................................................................................
 

控制系统的设计-----------------------------------------------------------------------------------29
4.1 控制系统中PLC的应用..............................................................................................29
4.2 传感器原理................................................................................................................31
4.3 放大器LM339N............................................................................................................31
4.4 PLC控制设计..............................................................................................................33
4.5 小结............................................................................................................................36
结论---------------------------------------------------------------------------------------------------- 37
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