摘要
Desig
ofDigitalThermomerBasedo
SCM
I
dailylifea
di
dustrialproductio
processofte
usedi
thedetectio
a
dco
troloftemperaturetemperatureistheproductio
processa
dscie
tificexperime
tsi
ge
erala
do
eoftheimporta
tphysicalparameterTraditio
althermocouplea
dtemperaturecompo
e
tsaretheseco
dresistorThethermocouplea
dthermalresista
cearege
erallymeasuredvoltagea
dthe
replacedbythecorrespo
di
gtemperaturethesemethodsarerelativelycomplexrequiri
garelativelylarge
umberofexter
alhardwaresupportWeusearelativelysimplewaytomeasureWeusetheU
itedStatesfollowi
gDALLASSemico
ductorDS1820improvedafterthei
troductio
ofasmarttemperaturese
sorDS18B20asthedetectio
eleme
tatemperaturera
geof55C125Cuptoamaximumresolutio
of00625CDS18B20ca
bedirectlyreadoutthetemperatureo
the
orthsidea
dthreewiresystemwithsi
glechipco
ectedtoadecreaseoftheexter
alhardwarecircuitwithlowcosta
deasyuseThei
troductio
ofacostbasedAT89C52MCUatemperaturemeasureme
t
circuitsthecircuitsusedDS18B20highprecisio
temperaturese
sormeasuri
gscope0C～100Cca
setthewar
i
glimitatio
theuseofseve
segme
tsLEDthatca
bedisplaythecurre
ttemperatureThepaperfocuseso
providi
gasoftwarea
dhardwaresystemcompo
e
tscircuiti
troducedthetheoryofDS18B20thefu
ctio
sa
dapplicatio
sofAT89C52Thiscircuitdesig
i
ovativepowerfulca
beexpa
sio
arystro
g
Keywords：Temperaturemeasureme
t
DS18B20
AT89C52
I
f摘要
目录
第1章引言111课题背景及研究意义112课题的设计目的113课题设计主要工作214本文研究内容2第2章开发工具Proteus与Keil321Proteus软件简介322Keil软件简介3第3章系统概述531设计方案532系统设计原理533系统组成634DS18B20温度传感器与单片机的接口电路7第4章系统硬件设计84189C52单片机的介绍841189C52单片机主要特性941289C52单片机管脚图1042液晶r