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加热炉温度控制系统设计
摘要加热炉温度控制系统广泛应用于冶金、化工、机械等各类工业控制中，并且在国民经济中占有举足轻重的地位，本文介绍了一种基于单片机的加热炉温度控制系统。本系统以单片机AT89C51为核心，由温度检测、变送及转换电路、控制电路、显示电路、键盘电路、报警电路等组成。本系统通过热电偶温度传感器对温度进行实时检测、变送并通过AD转换电路转换为数字信号送给单片机，单片机对温度数据进行数字处理并进行PID运算计算出控制量，来改变固态继电器的导通和关断的时间，从而改变加热功率实现对温度控制。其中键盘电路可以对温度进行预设；显示电路可以显示当前温度，直观易懂，让人一目了然；当炉内温度过高或过低时，将会进行声光报警。该系统硬件成本低，控温精度较高，可靠性好，抗干扰，具有适合企业大规模生产的产品实用性。关键词加热炉；AT89C51；PID控制；温度控制
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TheDesig
ofTheHeati
gFur
aceTemperatureCo
trolSystem
AbstractTheheati
gfur
acetemperatureco
trolsystemiswidelyusedi
metallurgychemicali
dustrymachi
erya
dotherki
dsofi
dustrialco
trola
dhasplayadecisiverolei
the
atio
aleco
omystatusthispaperi
troducesaki
doffur
acetemperatureco
trolsystembasedo
SCMTheAT89C51microco
trollersystemasthecorebythetemperaturedetectio
tra
smissio
a
dco
versio
circuitco
trolcircuitdisplaycircuitkeyboardcircuitalarmcircuitThesystemthroughthethermocoupletemperaturese
sorfortemperaturei
realtimedetectio
tra
smissio
a
dco
versio
throughtheADisco
vertedtoadigitalsig
altothemicroco
trollermicroco
trollerfordigitalprocessi
goftemperaturedataa
dPIDoperatio
stocalculatetheco
trolqua
titytocha
gethesolidstaterelaytur
o
a
dtur
offtimethuscha
gi
gtheheati
gpowerofthetemperatureco
trolThekeyboardcircuitmaybepresettemperaturedisplaycircuitca
displaythecurre
ttemperaturei
tuitivea
deasytou
dersta
dletpeoplestickoutamilewhe
thefur
acetemperatureistoohighortoolowwillalarmThehardwareofthissystemislowcosthightemperatureco
trolaccuracygoodreliabilitya
tii
terfere
cewhichissuitablefortheproductispracticalforlargescaleproductio
e
terprisesKeywordHeati
gfur
ace；AT89C51；PIDco
trol；Temperatureco
trol
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