5. Hardware and Circuit Testing
MHSS has been tested at a model of the house yard. The circuitry is integrated with the model to simulate the real multilevel security system. The hardware is divided into three modules which are the input modules, interfacing module and output module as discussed in section 4. The input module consists of laser sensing node, presence detecting node, and break-in sensing node. The interfacing module comprises a UART and a PC. The output modules contain a series of responding components which correspond to the input obtained from the input modules such as webcam, light bulbs and a buzzer.
5.1 System Demonstration
As shown in Figure 7a, the microcontroller sends a high signal output to the light bulbs when the laser sensing node is breached. Then the light bulbs are turned on instantly. The microcontroller is programmed to perform in such a manner that the light bulbs will be turned off if the triggering does not go to the next stage after 3 minutes asshown in Figure 7b. The output of the microcontroller becomes low after this period. This serves as the purpose of power saving which reduces the cost of the monthly electric bill. The lighting of the light bulbs is to warn the thieves that their presences are known and notified.
The triggering of the second stage of the system retains on-state of the first set of the light bulbs. A presence detector sensor is placed at the central of the house yard. Basically, it detects the motion of the thieves when they pass through the central area of the house yard. The output components such as camera will be turned off when there is no triggering in the consequent stage. The light bulbs are turned on until the power supply is cut off. The light bulbs are turned on and off by the signal transmitted from the signal control unit. This is due to the signal control unit monitors the system’s behaviour throughout the whole process of MHSS. When the magnetic sensor is breached, it will send a high signal output to the PIC and the signal will be processed in the GUI and the webcam will capture images then a text message with the attached captured images which will be sent to the users and the law enforcement body. All the three sets of light bulbs will be turned on and the buzzer will start making noises.
The triggering of the second stage of the system retains on-state of the first set of the light bulbs. A presence detector sensor is placed at the central of the house yard. Basically, it detects the motion of the thieves when they pass through the central area of the house yard. The output components such as camera will be turned off when there is no triggering in the consequent stage. The light bulbs are turned on until the power supply is cut off. The light bulbs are turned on and off by the signal transmitted from the signal control unit. This is due to the signal control unit monitors the system’s behaviour throughout the whole process of MHSS. When the magnetic sensor is breached, it will send a high signal output to the PIC and the signal will be processed in the GUI and the webcam will capture images then a text message with the attached captured images which will be sent to the users and the law enforcement body. All the three sets of light bulbs will be turned on and the buzzer will start making noises.
Figure 7. The Simulation of MHSS
5.2 Software Simulation
The operational process of MHSS has been validated by software simulation on Proteus 7 Professional as shown in Figure 8. The system is simulated using a push button while the LEDs denote the output components of the system. The simulation is carried out as the preparation before real time process is executed. Each button isconnected to different input pins which give different outputs when one of them is clicked. Pressing of each button simulate the triggering of the sensors nodes. The LEDs are turned on accordingly to the triggering button.
Figure 8. Simulation is Carried out on Proteus 7 Professional
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