Car Park

 Guest arriving: 

🔷The car’s presence would be detected by an induction loop… 

… because the electromagnetic field in the loop/coil is disturbed by a 

metallic object/car. 

🔷The computer/microprocessor would receive a message from the induction  loop to this effect. 

🔷The computer/microprocessor would send a signal to a motor to operate. 

🔷The motor would cause the barrier to raise. 

🔷A light beam from one post passes across… 

…to a light sensor in the other post. 

🔷The computer/microprocessor receives a signal or not from the sensor. 

🔷If the light sensor does not send a signal the bar remains vertical. 

🔷If the light sensor sends a signal, the computer/microprocessor sends a 

signal to the motor to lower the barrier 

Six max from: 

Guest departing: 

🔶The guest would receive a ticket with a bar code/Q code/receive the PIN  from reception. 

🔶On arriving at the exit barrier the guest would present the ticket to a  scanner/keys in the PIN. 

🔶The computer/microprocessor would compare the code/PIN with acceptable  codes/PIN. 

🔶If it matches, the computer/microprocessor would send a signal to a motor to operate. 

🔶The motor would cause the barrier to raise. 

🔶A light beam from one post passes across… 

…to a light sensor in the other post . 

🔶The computer/microprocessor receives a signal or not from the sensor. 

🔶If the light sensor does not send a signal the bar remains vertical. 

🔶If the light sensor sends a signal, the computer/microprocessor sends a  signal to the motor to lower the barrier.