The device communicates with smart phone through a specially designed application that acts an interface between the device and the phone. The data directed by the smart band such as the pulse rate, temperature of the body along with the motion of the body is continuously monitored by the application which is pre-installed in the phone. In cases of abuse, the app directs the smart phone to perform the following tasks:•Sends message to the family members along with the co-ordinates. •Co-ordinates is sent to nearest police station requesting immediate action. •Also sends information to people in near vicinity requesting public attention. The app is programmed in such a way that it uses the GPS of the smart phone to track the co-ordinates and monitor the movement for easy track ability! The help message is sent to the family members and the nearest police station through the GSM facility that is inbuilt in the phone.
The app also provides a social platform where the people who have this particular app installed get the messages instantaneously so that they too can contribute in justice being delivered just in time. This feature is executed by using internet facilities of the phone of the user. Control Unit collects information from smart wrist unit and GPS receiver. GSM module will then send all these information from control unit to base station. Wrist unit collects the data from human using body temperature sensor, pulse rate senor and switches. RF module is used to send data from wrist unit to the control unit.
A.PULSE RATE SENSOR: Heart beat sensor gives digital output of heart beat. When heart beat detector is working the led flashes for every heart beat. This digital output will be connected to microcontroller directly to calculate the beats per minute (BPM) rate. It works on the principle of light modulation of networked satellites and are tracked to uplinks data for synchronization. The system uses four frequencies in the L-band which ranges from 1.2 to 1.6 GHz.
B.GSM MODULE: GSM is used to send data from control unit to base unit .We can use GSM 300 which operates at frequency 900MHz. It has up link band of 890MHz to 915MHz and down link Band of 935MHz to 960 MHz GSM takes advantages of both FDMA & TDMA. In 25MHz BW, 124 carriers are generated with channel spacing of 200 KHz (FDMA). Each carrier is split into 8 time slots (TDMA). At any given instance of time 992 speech channels are made available in GSM 300 , .
C.DUAL TECHNOLOGY MOTION SENSOR: A Motion Sensor is a device that detects moving objects. A motion detector is often integrated as a component of a system that automatically performs a task or alerts a user of motion in a specified area. Motion sensors form a vital component of security. Many modern day motion sensors use combinations of various technologies. While combining multiple sensing technologies into one detector reduces false triggering, it does at the expense of reduced detection probabilities and increased vulnerability factor .
D.BLE( Bluetooth Low energy) BLE is designed to connect devices with low power consumption. A study by Beacon software, Aislelabs, reported that peripherals, such as proximity beacons, usually function for an year with a 1,000mAh coin cell battery. This is possible due to the power efficiency of Bluetooth Smart protocol which only transmits small packets as compared to Bluetooth Classic which was compatable for audio and high bandwidth data .
E.TEMPERATURE SENSOR: Human body temperature is of vital importance to maintain the health and therefore it is necessary to monitor it regularly. We can measure the body temperature using various temperature sensors. For instance, LM35 series are precision integrated circuit sensors whose output voltage is linearly proportional to the Celsius temperature. It operates linearly +10.0mV/°C scale factor with 0.5°C accuracy.In emergency caes body temprature varies drastically which can trigger module for rescue
F. GPS MODULE: Global positioning system (GPS) is able to determine the latitude and longitude of a receiver on Earth by calculating the time difference for signals from varios satellites to reach the receiver. In six different orbits approximately 12,500 miles above the earth, 24 MEO (Medium-Earth Orbit) satellites revolve around the earth 24 hours and transmit location every second as well as present time from atomic clocks and by monitoring blood flow through skin when is in contact with the wrist band at each pulse.
The following steps are initiated when once the unusual behaviour of the user is detected. The decision is made by the inputs given by the various sensors like pulse rate sensor, temperature sensor and unusual motion detected by the motion sensor. The situations are pre-programmed into the system based upon which the device makes the decision and is handled by the smart phone app. 1.Assign the transmitter and reciever pins of GPS module. 2.Set the serial buffer with baud rate 9600 and bit rate 4800. 3.Now set a loop which will then trigger the following actions: a)Scan the contact number from SIM. b)Get data from GPS module. c)Convert the longitude and latitude obtained from GPS into a Goggle URL. d)Attach this URL with an alert message. e)Send this message to pre-selected ICE(In Case of Emergency) numbers from SIM memory periodically until device is reset.
This type of an idea being the first of its kind plays a crucial role towards ensuring Women Safety in the fastest way possible automatically. The proposed design will deal with critical issues faced by women in the recent past and will help solve them through technologically sound gadgets. With further research and innovation, this project can be implemented in different areas of security and surveillance. The system can perform the real time monitoring of desired area and detect the violence with a good accuracy.