Kev faib tawm Crankshaft sensor
Muaj peb hom tseem ceeb ntawm crankshaft sensors: magnetoelectric induction, Hall effect thiab photoelectric.
1, sib nqus induction yam:
Cov koob yees duab magnetoelectric induction ceev thiab lub crankshaft txoj hauj lwm sensor tau nruab rau hauv cov chaw faib khoom hauv cov khaubncaws sab nraud thiab sab saud. Lub ntsuas muaj cov hlau nplaum tas mus li ua qhov kev kuaj pom lub kauj thiab lub rotor (sij hawm rotor thiab ceev rotor) uas tig nrog tus ncej xa khoom. Lub sijhawm rotor muaj ib qho, ob lossis plaub hniav thiab lwm daim ntawv, thiab lub rotor tig muaj 24 hniav. Cov hlau nplaum tas mus li induction kuaj coil yog tsau rau ntawm lub cev faib khoom. Yog hais tias lub nrawm ntsuas lub teeb liab thiab crankshaft txoj hauj lwm lub teeb liab lub teeb liab tau paub, nrog rau cov haujlwm ua haujlwm ntawm txhua lub tog raj kheej, crankshaft txoj haujlwm ntawm txhua lub tog raj kheej tuaj yeem paub. Lub rotor teeb liab disc ntawm magnetoelectric induction ceev sensor thiab crank txoj hauj lwm sensor kuj tuaj yeem ntsia ntawm crankshaft lossis camshaft.
2, muaj cov nyhuv hom:
Lub Hall effect ceev sensor thiab lub crank txoj hauj lwm sensor yog cov teeb liab hluav taws xob uas siv Hall ua haujlwm. Lub teeb tsa hluav taws xob Hall tau nruab rau hauv lub chaw xa khoom, coaxial nrog lub taub hau splitter, thiab yog siv tau ruaj khov rau ntawm lub tuam txhab faib tawm los ntawm kev ntim cov cuab yeej ua noj thiab cov hlau nplaum ruaj khov. Tus naj npawb ntawm kev ceeb toom rau ntawm cov txhais impeller yog tib yam li cov lej ntawm cov thooj voos kheej kheej hauv lub cav. Thaum cov hniav ntawm tus impeller tau nkag mus rau hauv nruab nrab ntawm cov hlau nplaum ruaj khov thiab Hall nrog, qhov chaw sib nqus ntawm Hall tau dhau los ntawm cov hniav, thiab tsis muaj Hall voltage raug tsim nyob rau lub sijhawm no, thiab lub sensor tsis muaj lub teeb liab tsim tawm; thaum cov thais feem ntawm lub impeller yog triggered kom nkag mus rau cov hlau nplaum tas mus li Thaum nws nyob nruab nrab ntawm Hall Element thiab Hall Element, cov hlau nplaum kab nkag rau hauv Hall Hall, lub Hall voltage nce siab, thiab lub teeb tsa hluav taws xob tso tawm lub teeb liab.
3, photoelectric hom:
Cov photoelectric crank txoj hauj lwm sensor feem ntau ntsia tau rau hauv tus neeg muab khoom faib tawm, thiab tau tsim ntawm lub teeb liab tshuab hluav taws xob thiab daim phiaj teeb liab nrog lub teeb. Lub teeb liab disc tig ua ke nrog tus tuav xa tawm. Muaj 360 lithography khoob ntawm lub nplhaib sab nraud ntawm lub teeb liab disc, uas ua kom muaj teeb liab nrog lub crank kaum sab xis ntawm 1 °. Muaj 6 qhov kho qhov muag nrog qhov tshwj xeeb ntxig rau 60 ° sab hauv, uas ua rau lub kaum sab xis crank ntawm 120 °. Lub teeb liab, ib qho yog dav dua, siv los ua lub teeb liab sib txuas rau qhov kawg tuag nruab nrab ntawm lub tog raj kheej. Lub teeb liab hluav taws xob tau teeb tsa ntawm lub tsev xa khoom thiab muaj ob lub teeb ci, ob qhov chaw thaij duab thiab lub teeb hluav taws xob. Cov LED tau ntsia lub photodiode. Lub teeb liab disc yog nyob nruab nrab ntawm lub teeb ci thiab lub photodiode. Vim yog lub teeb lub teeb ntawm lub teeb liab disc, hloov sib kis thiab xa cov duab ntxoo hluav taws xob yog tsim. Thaum cov kab hluav taws xob ntawm lub teeb hluav taws xob qhia tau hais rau photodiode, lub photodiode tsim hluav taws xob ua haujlwm; thaum lub teeb nrig hluav taws xob thaiv lub nrig, lub photodiode voltage yog xoom. Cov ntsuas hluav taws xob no tau zoo li tus kheej thiab ua kom loj los ntawm qhov hluav taws xob kom xa cov cim rau chav tswj hluav taws xob ntawm qhov ntsuas crank ntawm 1 ° thiab 120 °, thiab chav tswj hluav taws xob tau laij cov cav hluav taws xob thiab crankshaft txoj hauj lwm raws cov cim no.