文档介绍：JIANGSUUNIVERSITY
本科毕业论文
脉宽调制型差动电容位移传感器的研究
StudyofDisplacementSensorBasedonPulseWidthModulated
DifferentialCapacitorechangesofthecapacitance,theoutputsignal
themeasurednon-electricalquantityintothevoltage,currentorfrequencysignals.
Thecontentsofthisthesisarethedesignofthecapacitivedisplacementsensorandits
,thecapacitorconsistsofthreemetalplateswhichare
placedparallel,
modulationsignalprocessingcircuitsothatwecanachievethedetectionofsmall
displacement
,theoverall
circuithasthe
followingcharacteristics
,high
linearity,
high
sensitivity
andsmall
temperaturedrift.
Thesystemis
isthe
productionofthe
otheristhe
measuringcircuit
astep-by-step
test,we
buildacomplete
experimental
systemand
developamicro-displacement
therelativepositionofthe
movingplate
andthetwofixedplateswhich
iscalledrelativedisplacementchanges,theoutput
voltageof
alinearrelationshipbetweenthevoltageandthedisplacement.
Keywords:Capacitive
sensorsDifferential
structure
Pulsewidthmodulation
Micro-displacementLinearrelationship
第一章绪论-1-
-1-
-1-
-2--3-第二章电容式传感器的相关理论与其设计-4-
-4--5-变极距型电容传感器-5--5--6-
-7-
-8--9-电容式传感器的优点-9--9--10--10-提出方案-10--11--12-第三章常用的电容式传感器测量电路-12-
-12-
-13-
-14-
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-16--16-第四章采用脉冲调宽原理设计的微小位移测量仪-16-
-17--20--20--20--21-