Hey guys,
Long time lurker having an issue with some conditions presented in this project.
I have to develop a logic circuit to control the exit of personnel from a high security processing facility. Also, I have been given a number of conditions that apply to an exit door as well as a separate search room door.
One specific condition regarding a fire alarm is that the only time both doors will unlock is when the fire alarm is engaged; however, I have encountered several other instances in which both doors will unlock when the fire alarm not engaged. I have tried to find a way to prevent this from happening but I am stuck on this issue.
So far I have developed the Boolean equations for each of the two doors and have simplified each of those equations. I have also created the truth table for these equations and have some preliminary circuits designed for them.
I will attach a pdf containing the Boolean expressions I have created for this project as well as the truth table.
I have highlighted the conditions in which the fire alarm is on in a purple highlight. Additionally, I have highlighted the conditions in which both the exit room as well as the search room doors will become unlocked when the fire alarm is not engaged.
The actual conditions are within a project document I have and are quite lengthy. If anyone would like me to expand on them I can, however, I beleive the Boolean equations outline the conditions just fine.
F-represents the fire alarm =0 when engaged =1 when not engaged
C-represents the pass-code required =1 when correct =0 when not correct
D-represents the entrance door sensor =1 if closed =0 if open
T- represents the shift time =1 if day shift =0 if night shift
P- represents the panic switch =0 if active =1 if inactive
V - represents the security over-ride. =1 when engaged =0 when not engaged
The outputs are represented as:
X for the exit room door
S for the search room door
Long time lurker having an issue with some conditions presented in this project.
I have to develop a logic circuit to control the exit of personnel from a high security processing facility. Also, I have been given a number of conditions that apply to an exit door as well as a separate search room door.
One specific condition regarding a fire alarm is that the only time both doors will unlock is when the fire alarm is engaged; however, I have encountered several other instances in which both doors will unlock when the fire alarm not engaged. I have tried to find a way to prevent this from happening but I am stuck on this issue.
So far I have developed the Boolean equations for each of the two doors and have simplified each of those equations. I have also created the truth table for these equations and have some preliminary circuits designed for them.
I will attach a pdf containing the Boolean expressions I have created for this project as well as the truth table.
I have highlighted the conditions in which the fire alarm is on in a purple highlight. Additionally, I have highlighted the conditions in which both the exit room as well as the search room doors will become unlocked when the fire alarm is not engaged.
The actual conditions are within a project document I have and are quite lengthy. If anyone would like me to expand on them I can, however, I beleive the Boolean equations outline the conditions just fine.
F-represents the fire alarm =0 when engaged =1 when not engaged
C-represents the pass-code required =1 when correct =0 when not correct
D-represents the entrance door sensor =1 if closed =0 if open
T- represents the shift time =1 if day shift =0 if night shift
P- represents the panic switch =0 if active =1 if inactive
V - represents the security over-ride. =1 when engaged =0 when not engaged
The outputs are represented as:
X for the exit room door
S for the search room door
Attachments
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