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ѹȼʽ˫ȼϷȼת

³ ʱ䣺 2007/04/03 | 4137 Ķ

ѹȼʽ˫ȼϷȼת

ǶԴͻעȼĸЧྻȼΪһҪġɫ̡ڸ˹㷺ĹעԲΪȼȼϵȻ/˫ȼϷǽһһЧֶΡ

˫ȼϷԭвͷĻϸװɣ˷һĹ״̬ſͨת˫ȼ״̬¹һ£˫ȼ״̬²žõЧһ£ˮ¸50ʱʺ˫ȼ״̬Ϊ˸õʹúͱȼתӦñ֤ڷˮһſת˫ȼϹ״̬Ϊʵȼת˳Уȼתƻ

1 ϵͳ

ת߼ƵԪҪ˾תźX1ˮźX2ѹȻѹźX3ȼת״̬ķźX4ȣȽһ߼жϣʵָָȻתʾͼͼ1ʾ

ȻתĻеִвֱܹ߼ƵԪָźŻΪеУʵȼתĿģһɿصɡڷУҪ󿪹صλöӦеִвֵֹ״̬˫ȼϹ״̬ʹ͹״̬ͨеֵжϻӼ̤˶Ƹ˵˶״̬̤ԵʱƸ˾˶ʱ߼ƲֹرոѹȻصԪECUǴ͹״̬̤˶Ƹ˵ĴݱежʱƸ˱̶ڵλã߼ƵԪȻѹصԪECU͹źţ˫ȼϹ״̬˾ֻ嶯תأָ߼ƵԪݽյźжϣͬʱʵִ˫ȼֹ״̬ת[1]

2 ߼ƵԪ

߼ƵԪҪʵźŵĽաжϺͷ͡Ҫɣ߼жϲ֡ؽӿڲֺ͵Դת֡

߼ƵԪĹ£ؽӿڲֽյģźתΪźŴݸ߼жϲֺ߼жϲжתǷ㣬ָؽӿڲָֽתΪӦʶźţԴĴȡԴҪǽƿ12VѹתΪ߼ƵԪԪҪĵѹ5V

2.1 ߼жϲ

߼жϲֽؽӿڲִźţжϺ󷢳Ӧָ

ڴ˹涨˾תת˫ȼϹλʱתźx1=1λʱX1=0ˮ´ﵽ˫ȼ״̬Ҫʱˮźx2=1x2=0ѹȻʹõСѹʱȻѹźx3=1x3=0еִ˫ȼϹ״̬ʱźx4=1еָֻ͹״̬ʱźx4=0߼жϲַָУصźY1ʱصеת˫ȼϹ״̬ʱY1=1Y1=0ѹȻŷźY2ʱŷʱY2=1ŷرY2=0źY2йʱźŵƹY3=1Y3=0صԪECUźY4ECUʹ乤ʱY4=1Y4=0

Ϸ󸟟ŵ߼ؼʽ

Y1=X1X2X3

Y2=X1X2X3X4

Y3=X1X4+X1X2X3X4

X4=X1X2X3X4

߼ϵȽϼ򵥣TTL·74ϵеоƬ߼жϹܣ߼ֵĵ·ͼͼ2ʾ[2]ͼУ74117408ţ7404Ƿ7402ǻšźX1X2X3X4źY1Y3Y4Y2=Y4ԸѹȻĵŷ͵صԪECU·Y4ơ

2.2 ؽӿڵ·

ΪЩźģˮ´ǿ仯ĵѹźţ߼ƵԪ޷ֱӽղʶжϣ˾Ҫؽӿڵ·תΪźš

ؽӿڵ·һþǽ߼жϲֵָתΪһЩĵźţźŵȡ

2.2.1 ѹȽ

߼ƵԪУҪõѹȽһˮ´ĽӿڣһȻѹĽӿڡ

    ԱȽLM311һοѹѹڲοѹʱȽĵѹΪ͵ƽڲοѹʱѹΪߵƽ

2.2.2 ·

ȼתУص͸ѹȻֹҪǿĹ·ֲù̵̬߼жϲֵָתΪǿĵźš

ͼ3ΪѹȻֹ·01Ϊ̵̬˫ȼ״̬ʱȼת߼жϲַָʹY4=1ΪߵƽU27404BĵUBΪ͵ƽAĵUAȵBߣʱ̵̬˽ͨҲͨCDһͨŷHPVALVE˾ͻ12VĶѹʹѹǰĸѹȻŴ򿪣Ȼѹ뷢߼жϲַָʹŷرʱY4=0BΪߵƽUA=UB̵̬ûеͨ˲ͨŷڵ»ָ״̬

ͼ4Ϊص·U874123оƬ0203ǹ̵̬ȦPUSHǿصȦHOLDάȦԴVDDΪ24VȻתת˫ȼϹ״̬ʱ74123BY1ӵ͵ƽߵƽתֱ仯74123Qһ˲ʱĸߵƽάʱΪT7404AĵUAͬĵ͵ƽ̵̬02ҲTʱĵͨʱ̵̬02˳TʱĵͨʱڣǿͨصȦ㹻ĵоTѡӦòοصܲ趨ҪоҪֲ̫Ȧջ١

TͨѡR10C3ֵȷġTȡΪ1룬R10=1000C3=1000F

ӲϽصάֵߵѹȻŷĹͬĻY1=1ʱάֵоά״̬Y1=0ʱάֵоڻλɵ»ָԭλá

    2.3 Դ

ԴVOLTREG7805Ϊĵĵѹ·ƿṩ12VԴ߼ƵԪоƬĹѹ5Vеѹתͼ5ΪԴֵĵ·ͼ12VVCCĵѹΪ5V

ԴҪעǵѹȶԺ͹ơͼиݾ˲ʹܵãֹѹѹZ1֤OVLTREGĵѹȷΪ12VĹʵR11R12ѹãֹԴءƿṩܵ߼ƵԪԴܹάȶѹá

ɺ󣬰װɺX6130װɵ˫ȼϷϡʵ֤ϵͳԺܺõʵ˫ȼϷȼת̡



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