The project aims in designing a system which helps the paralyzed people to express their basic needs. This system makes use of gestures of body parts to announce their basic needs like food, water, etc..,. MEMS (Micro Electro-Mechanical Systems) accelerometer sensor is placed on any movable part of the body of the paralyzed and he need to move that part in different directions to announce different needs.   MEMS is a Micro Electro Mechanical Sensor which is a highly sensitive sensor and capable of detecting the tilt. This sensor finds the tilt and makes use of the accelerometer to open or close the door depending on tilt. For example if the tilt is to the right side then the door opens or if the tilt is to the left side then the door closes.   The control system consists of MEMS accelerometer sensor and microcontroller. Microcontroller collects data from the sensor and announces appropriate announcement for that data (gesture movement). The announcement is given by the microcontroller through the voice circuit interfaced to it. To perform this intelligent task, Microcontroller is loaded with an intelligent program written in embedded ‘C’ language.  

The objectives of the project include:  

1. To help the paralyzed, to express their basic needs through simple gesture movement.
2. Usage of MEMS sensor for gesture based operations.
3. Voice based announcement of predefined basic needs.

  The project provides exposure to the following technologies:

1. Characteristics of MEMS accelerometer sensor.
2. Voice circuit characteristics.
3. Interfacing of MEMS and Voice circuit to Microcontroller.
4. Embedded ‘C’ programming concepts.
5. PCB designing.

The major building blocks of this project are:  

1. Regulated Power Supply
2. MEMS accelerometer.
3. Micro Controller
4. Voice circuit.
5. Crystal
6. Reset
7. LED indicators.

  Software’s used:  

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Microcontroller.
3. Express SCH for Circuit design.

   

Block diagram:

video: