多频电磁发射机的设计
Abstract
WiththerapiddevelopmentofChinasindustry,thedemandformetalmineralsand
energysuchascoal,oilandnaturalgasisalsoincreasing,whichputsforwardhigher
requirementsforgeophysicalexplorationtechnology.Electromagneticexplorationiswidely
usedintheexplorationofoil,gasandmineralresources,andisanimportantgeophysical
explorationmeans.Atpresent,theelectromagnetictransmittersusedinengineeringoperations
aremainlyfromabroad.Inthefaceofcomplexdetectionenvironment,itisofgreat
significancetodesignaportableelectromagnetictransmitterthatcantakeintoaccount
time-frequencydomainwaveformemissionandcovermultiplefrequencybands.Thispaper
studiesthedevelopmentstatusandrelatedtechnologiesofelectromagnetictransmittersat
homeandabroad,drawsonthedesignideasofexcellenttransmitters,andresearchesand
designsseveralmajorfunctionalmodulesoftransmitters.
Inthehardwarepartofthetransmitter,theclocksignalprocessingcircuitisdesigned.
Alarmandtransmissioncontrolcircuit;IGBTfullbridgeswitchcircuitanditsdriveand
protectioncircuit;Transmittingcurrent,voltage,temperaturesignalacquisitioncircuit.
STM32MCUisusedforsignalprocessingandthecontrolpanelisdesigned.Thesoftware
partistosupportthehardwarecircuit,mainlytoeachmoduleofthesubroutineand
monitoringinterfacedesign,theprogramincludesdataacquisitionandprocessingprogram,
alarmprogram,displayprogramandsoon,theuseofTiojingchiserialscreendesign
monitoringinterface.Afterthedesigniscompleted,theinstallationtestiscarriedout,
respectively,using20Ωand10Ωresistanceinsteadofthetransmittingcoilastheload,using
24Vand100VDCvoltageastheexternalinput,testingthetransmitterstransmitting
waveformunderdifferentvoltages,fre