Design a logic program that will track the activity for one turnstile. there wil

Question

Design a logic program that will track the activity for one turnstile. there will be three inputs PHASEA, B and RESET. there will be no output. the program should be able to track 999 total guests. turnstile the two switches, phase a and b that are mounted so that as a guest passses through the turnstile the two switches will turn on in a seqwuence. the sequence depends on whether the guest is entering or exiting the park. when someone enters the gate PHASEA outputs a signal before switch PHASEB. When someone leaves PHASEB outputs a signal before PHASEA. since the two switches are located close togetherk, there wil always be some overlap in their pulse outputs unless a guest starts through a gate and then backs out. if guest backs out, it wil create a false trigger that should not be counted.

Explanation / Answer

There is a simple logic. If someone will pass through the trunstile ther will one time when both the phase are ON. (Also if a person back out there will be no such case so in a way we would not count false trigger.)

So we will count these and divide by 2 since each person will be counted twice once when he comes in and next when he leaves.

Logic is

------------------------------

count = 0

if (phaseA=1 and phaseB=1) then

{count = count+1

}

number of guests = count/2

Please rate if this helps. Thank you

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