Core Mechanical Structure
Lub hauv paus ntawm ib qho incremental encoder muaj cov lej disk thiab cov cuab yeej tshawb pom:
Code Disk: Feem ntau yog ib daim ntawv nyias, voj voog (ua los ntawm iav lossis hlau) nrog qhov sib npaug sib npaug, pob tshab / qhov cuam tshuam (lossis cov khoom siv hluav taws xob / insulating) raws nws ntug. Qhov sib txawv ntawm qhov sib txawv ntawm qhov nyob ib sab yog hu ua "kev daws teeb meem" (xws li, 1024 kab ib kiv puag ncig, piv txwv li, 1024 PPR).
Cov cuab yeej kuaj pom: muaj lub teeb ci (piv txwv li, ib qho LED) thiab photodetector (piv txwv li, phototransistor), nrog rau code disk sandwiched ntawm lawv. Raws li cov code disk tig, cov slits ib ntus thaiv lub teeb, ua rau lub receiver tso tawm cov teeb liab mem tes.
Kev Tsim Nyog Txoj Cai
Thaum lub code disk tig, lub teeb liab mem tes yog tsim los ntawm photoelectric induction. Cov txheej txheem tshwj xeeb yog raws li hauv qab no:
Yam Ntxim Saib Ntxim Ua Pulse (Phase A thiab Theem B): Cov lej disk feem ntau muaj ob pawg ntawm kev ywj pheej (Phase A thiab Phase B), staggered los ntawm 1/4 lub voj voog (90℃hluav taws xob lub kaum sab xis).
Thaum lub encoder tig, theem A thiab B txhua qhov tso zis square yoj pulses nrog 90℃theem sib txawv (yog tias theem A ua theem B los ntawm 90 degree, nws yog pem hauv ntej kev sib hloov; yog theem B ua theem A los ntawm 90 degree, nws rov qab tig).
Tus naj npawb ntawm cov pulses yog proportional rau lub kaum sab xis: Lub kaum sab xis=(Tus naj npawb ntawm pulses / Tag nrho cov cim) × 360℃.
Zero- txoj hauj lwm mem tes (Z theem): Ib qho kev ywj pheej ntxiv rau ntawm lub encoder outputs ib lub mem tes (Z theem) ib lub kiv puag ncig, siv los txiav txim qhov zero txoj hauj lwm (xws li, lub cev muaj zog calibration).
Kev teeb tsa thiab kev siv
Kev Txiav Txim Siab: Kev sib hloov mus rau pem hauv ntej / rov qab yog qhov txawv ntawm theem kev sib raug zoo ntawm theem A thiab B (piv txwv li, theem B yog siab / qis ntawm qhov nce ntawm theem A).
Kev ntsuas ceev: Tus naj npawb ntawm pulses ib chav tsev lub sij hawm qhia txog qhov kev sib hloov ceev: Kev sib hloov ceev=(Number of pulses / Time) × (60 / Tag nrho cov cim) (Unit: r / min). Subdivision technology: Subdividing pulses los ntawm circuitry (piv txwv li, 4x zaus multiplication) los txhim kho kev daws teeb meem (xws li, ib tug 1024-kab encoder yuav sib npaug rau 4096 kab tom qab 4x zaus sib npaug).
