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ѹȼʽ˫ȼϷȼת

ʱ䣺2007-1-20Ŀͨ

ǶԴͻעȼĸЧྻȼΪһҪġɫ̡ڸ˹㷺ĹעԲΪȼȼϵȻ/˫ȼϷǽһһЧֶΡ

˫ȼϷԭвͷĻϸװɣ˷һĹ״̬ſͨת˫ȼ״̬¹һ£˫ȼ״̬²žõЧһ£ˮ¸50ʱʺ˫ȼ״̬Ϊ˸õʹúͱȼתӦñ֤ڷˮһſת˫ȼϹ״̬Ϊʵȼת˳Уȼתƻ
(www.fwsir.comռ)
1 ϵͳ

ת߼ƵԪҪ˾תźX1ˮźX2ѹȻѹźX3ȼת״̬ķźX4ȣȽһ߼жϣʵָָȻתʾͼͼ1ʾ

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

߼ƵԪҪʵźŵĽաжϺͷ͡Ҫɣ߼жϲ֡ؽӿڲֺ͵Դת֡

߼ƵԪĹ£ؽӿڲֽյģźתΪźŴݸ߼жϲֺ߼жϲжתǷ㣬ָؽӿڲָֽתΪӦʶźţԴĴȡԴҪǽƿ12VѹתΪ߼ƵԪϵԪҪĵѹ5V

2.1 ߼жϲ

߼жϲֽؽӿڲִźţжϺ󷢳Ӧָ

ڴ˹涨˾תת˫ȼϹλʱѹȼʽ˫ȼϷȼתתźx1=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͵

[1] [2] [3] һҳ

ҳʣ1 2 3 4 һҳ