To solve the security issue with respect to women and children, we have come up with an effective idea, keeping all the loopholes in reasoning. So the system to be designed is thus: A portable device which will have a pressure switch. As soon as an assailant is about to attack the person or when the person senses any insecurity from a stranger, he/she can then put pressure on the device by squeezing or compressing it. Instantly the pressure sensor senses this pressure and a conventional SMS, with the victim’s location will be sent to their parents/guardians cell phone numbers stored in the device while purchasing it, followed by a call. If the call is unanswered for a prolonged time, a call will be redirected to the police and the same message will be sent. Additionally if the person crosses some area which is usually not accessed by the person then a message with the real time location is sent to the parent/guardian’s phone via conventional SMS.
A.GSM800 This GSM Modem can accept SIM card of any GSM network operator and act just like a mobile phone. That mobile is having unique phone number. Advantage of using this modem will be that we can use its RS232 port to communicate and develop embedded applications. Using this technology Applications like messgage Control, data transferring, remote control and logging can be developed easily. GSM/GPRS MODEM is a class of wireless MODEM devices that are designed for communication of a computer with the GSM and GPRS network. It requires a SIM (Subscriber Identity Module) card just like mobile phones to activate communication with the network. Also they have IMEI (International Mobile Equipment Identity) number similar to mobile phones for their identification . A GSM MODEM can perform the following operations: •Sending, receiving and deleting of messages. •Adding, reading and searching phonebook entries of the SIM. •Making, Receiving, or rejecting a voice call.
B.Pressure Switch A pressure switch is a form of switch that closes an electrical contact when a certain set fluid pressure has been reached on its input. The switch may be designed to make contact either on pressure rise or on pressure fall. In our system we have used SPD005G component for functioning of pressure switch.
C.Microcontroller Arduino It’s an open-source physical computing platform which is having a simple microcontroller board, and a development environment where we can write code for the board. Microcontroller arduino can be used to develop interactive objects, taking inputs from a variety of switches or sensors, and controlling a variety of motors, lights, and other physical outputs. In our system we have used Arduino UNO microcontroller .
D.GPS The term GPS stands for global system positioning. The GPS system comprises of a fleet of satellites that orbit the earth in a geo synchronous manner. In order to determine a location on the earth’s surface, minimum three satellites are required. The functions of these satellites are to accurately triangulate the exact position based on the latitude longitude imaginary lines . In addition to giving the location of a GPS receiver on the earth’s surface, GPS also gives other parameters such as altitude, speed, course, number of satellites communicating and so on. GPS is a multiple – satellite based radio positioning system in which each GPS satellite transmits data that allows user to precisely measure the distance between the satellites and antenna to compute position, velocity and time parameters to high degree of accuracy. GPS delivers with high sensitivity and accuracy with low power consumption.
Step1: Pressure Switch is activated by crossing the threshold value which actuates the microcontroller. Step2: Microcontroller then records the location using GPS module and along with some other required parameters provides it to the GSM module. Step3: GSM module sends the messages to the phone numbers stored in the SIM with the location following a call to those contact numbers for some time slots. Step4:If the call is not answered by them, it will be redirected to the police. Step 5: A geofence is created in the beginning by specifying the coordinates of the location. If the person crosses the geofencing, the device will send notification to the cell phone number at particular intervals. Step 6: If the parent/guardian calls to the device then the device will send the victim’s location to the parent.