Patients monitoring system using GSM and Zigbee for hospitals
and old age homes
Technology is being used every where in our daily life to fulfill our
requirements. We are employing different sensors for different applications some times
we may even use same sensors differently for different applications. What ever it may
be the final output is life has increased its speed with the technology boosters. We can
not only increase the speed of life but also increase security with good ideas to make
use of this technology. One of the ideal ways of using technology is to employ it to
sense serious health problems so that efficient medical services can be provided to the
patient in correct time. This idea to provide efficient health service to patients has given
birth to the project heart beat monitoring system with wireless interfacing to mobile
phone using GSM modem.
Heart beat monitor and display system is a portable and a best replacement for
the old model stethoscope which is less efficient. The heart beat rate is calculated
manually using stethoscope where the probability of error is high, because the heart
beat rate lies between 70 to 90 per minute whose occurrence is less than 1 sec. So this
device can be considered as a very good alternative instead of a stethoscope.
This project aims in sending alert messages in emergency times, i.e. when a person
is alone in home or traveling if he got heart attack or met with an accident then alerting
messages will be send to the mobile phone. Here we get the alerting message from the
GSM modem (SMS Message).
The functioning of this device is based on the truth that the blood circulates for
every one heart beat which can be sensed by using a circuit formed by the combination
of an LDR and LED. Depending upon the rate of circulation of blood per second theheart beat rate per minute is calculated. This device consists of a micro controller which
takes the input from the heart beat sensor and calculates the heart rate of the patient.
The micro controller also takes the responsibility to convey the same
information to the remote system via wireless communication. For transmitting the data
to the remote system the controller is interfaced with a Zigbee transmitter. The Zigbee
transmitter transmits the data received from the controller and the Zigbee receiver
present at the GSM modem end receives it and also forward to the predefined
emergency mobile number using GSM modem in emergency situations.
The main objective of this project is:
1. Monitoring the heart beat through wireless.
2. Real time monitoring of health status of a person.
3. Sends alerts in the form of SMS messages to emergency ambulance.
4. Works any where in the world (with GSM availability).
5. Secure wireless communication over Zigbee.
The project provides learnings on the following advancements:
1. Developing a heart beat sensor based on LED and LDR.
2. LDR characteristics.
3. Zigbee wireless communication.
4. Conversion of AC supply to DC supply.
5. Serial communication over GSM modem.
6. Interfacing of LCD display.
7. Embedded C programming.
8. PCB design.
The major building blocks of this project are:
1. Regulated power supply.
2. Micro controller.
3. Heart beat sensor.
4. LCD display.
5. Crystal oscillator.
6. GSM modem.
9. LED indicators.
1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Microcontroller