Aluko Oluwadare Abiodun*, Babalola Abayomi Donald, Oyebiyi Adewale Julius
This research work will help in providing the level of security in an enclosed area to prevent or disturb attacks; this is done by keeping tracks of access information very convenient for the user to monitor the security of the properties. Conglomerate in the world population with in commensurate employment opportunities and pressures of a complex society, which among others include incidences of human intrusion, burglaries and crime in private and public places are on the increase at homes, banks, shopping malls, schools, offices, etc has become issue of concerned and worrisome in Nigeria. Thus, there is need to design a home security system which can detect an intrusion via sensor and trigger alarm, however, user who is away from home cannot get immediate notification of alarm incident, a Global System for Mobile communication (GSM) with wireless technology based Security system has to be incorporated to overcome the problem. This dissertation presents a design, and implementation of a security system that triggers an alarm upon the detection of an intruder and sends alerts via a SMS to whoever is in charge or security personnel. The system integrates sensor via a microcontroller such as Passive Infrared (PIR) sensor to detect an intruder and sound an initial warning for 30 seconds while awaiting the user response (system deactivation) in case of false intruder. Upon no response clearly indicates true intruder and the system eventually trigger an alarm and sends an (SMS) Short Message Service alert (predefined message which is embedded within microcontroller) to the user or security personnel through GSM module. The 4 x 4 matrix keypad is used to give command and the password to the Micro Controller Unit (MCU), which enables the MCU to verify the input from keypad with stored password to interface with peripheral device, upon the input of the correct password, the user, can only make the system activated or deactivated. The system used of PIR sensor, Peripheral Interface Controller (PIC) microcontroller, and GSM modem and hand phone as main components. The Security System employs GSM applications as a major wireless technology as to better performance of mobility, flexibility and ease installation. The developed system was demonstrated and performed on Proteus software for efficiency and the design was applied to a prototype home, when the intrusion detected with twenty five (25) attempt of “intrusion,” message received at user’ hand phone and evaluation of developed system produced values 0.8974, 0.9, 0.994 and 0.013 for specificity, sensitivity, accuracy and standard error delay time respectively. The research recommended an implementation that reduces the delay time and increase specificity, sensitivity and accuracy through the power supply. The implementation of GSM modem technology is function to improve the security system by sending alert message to user as he/she is away from home. The advantages of this security system are its high security level, low cost and ease of use.
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