Main Structure thiab Txoj Cai Ua Haujlwm ntawm Prepaid Electricity Meter
Lub ntsiab qauv thiab lub hauv paus ntsiab lus ua haujlwm ntawm prepaid hluav taws xob ntsuas
1. Lub ntsiab qauv
Cov nplaim hluav taws kub nyhiab ABS yog saws, uas muaj zog, kaw thiab tiv thaiv.
2. Daim duab qhia kev ua haujlwm
Lub ntsuas hluav taws xob hluav taws xob tau txais qhov ntsuas hluav taws xob ntsuas hluav taws xob los ntawm qhov hluav taws xob faib hluav taws xob, thiab qhov ntsuas ntsuas tam sim no tau txais los ntawm qhov ntsuas tam sim no. Cov khoom siv hluav taws xob tam sim no tau txais los ntawm qhov sib npaug. Tom qab kev hloov pauv zaus, suav pulse uas nws zaus yog proportional rau cov khoom ntawm voltage thiab tam sim no yog generated. Los ntawm kev faib zaus, lub tshuab stepper yog tsav los ntsuas hluav taws xob.
3. Kev ua cov ntaub ntawv
Lub zog hluav taws xob ntsuas pulse raug xa mus rau CPU rau kev ua haujlwm los ntawm photocoupler, thiab khaws cia rau hauv cov tsis-volatile EEPROM tom qab ua haujlwm. Lub khoos phis tawj tswj hwm cov ntaub ntawv, dhau los ntawm IC daim npav nyeem ntawv, sau qee qhov hluav taws xob thiab daim npav IC xav tau rau kev saib xyuas rau hauv microprocessor system hauv lub rooj, thiab tom qab ua haujlwm CPU, ceeb toom qhia, tswb, thiab txiav tawm cov xwm txheej teeb liab .
