NOTION:

          My idea is to make old citizens, pregnant ladies, and certain disabled people cozy with this device. The main perks of my device are,  

  1) The factories can make a robot and get most of the work done by it. There is no need for a human operator; the robot can perform repetitive tasks that follow the same path on its own.

2) The system in the robot is like once install and forget.

3) It is relatively cheap.

4) This type of robot is simple to build.

REQUIRED INSTALLMENTS:

1) Arduino UNO - The Arduino Uno is an open-source microcontroller board based on the Microchip ATmega328P microcontroller and developed by Arduino.cc. The board is equipped with sets of digital and analog input/output (I/O) pins that may be interfaced to various expansion boards (shields) and other circuits. The work assigned to my device is programmed in Arduino UNO, so it performs the main execution role. 

2) IR sensor - IR sensor is an electronic device, that emits light by sensing some object of the surroundings. whenever a person crosses it receives the signal, and the person gets detected. My device has two IR sensors, one for right and the other for left side detection. IR sensor is used as the direction controller of my device. 

3) Ultrasonic sensor - An ultrasonic sensor is an electronic device that measures the distance of a target object by emitting ultrasonic sound waves and converts the reflected sound into an electrical signal.  In   my development, it senses the distance of the object detected, when it is within 100 cm of distance. So, this sensor ultimately helps in correct accuracy of the distance from the object detected.

4) Servo motor - A servo motor is a rotary actuator or a motor that allows for a precise control in terms of the angular position, acceleration, and velocity. Basically, these types of motors make a rotation of 180 degrees. In my device, this feature plays a significant role that at the instant of initialization of the gadget, the sensors attached with this motor also rotates for 180 degrees for detection. 

5) Motor driver shield -   L293D is basically a high current dual motor driver/controller Integrated Circuit (IC). It is able to drive load having current up to 1A at the voltage ranging from 4.5V to 36V. L-293D has to build in H-Bridge driver circuits and is able to control two DC motors at a time in both clockwise and counter-clockwise directions. My device consists of a motor driver shield with 2 H-Bridge driver circuits and so it is used to control 4 DC motors. It is connected with Arduino to control the current supply and for the direct control of the motors.

6) DC gear motors -Gear motors are mechanisms that adjust the speed of electric motors, leading them to operate at a certain speed. They are composed of a series of gears that make up a kinematic chain, working on a set of rotary parts. They reduce an initial high speed to a lower one without negatively affecting the mechanism. My gadget holds 4 gear motors to help for the rotation of the wheels in movement.

7) Small car wheels – My development contains 4 wheels which help in the perfect movement of the device.

8) Li-on Batteries – My device holds 3 lithium-ion batteries for the dc power supply. Each battery has a voltage of 3.7v .

WORKING PRINCIPAL:

          Immediately, at the initialization of the device, the servo motor gets powered up and rotates in 180 degree for detection. At the completion of that movement, the ultrasonic and the IR sensor waits for the object to be detected. Now, whenever a person crosses within a range of 100 cm from the device, the IR sensors receives the signal and emits the light indicating that an object is detected. Simultaneously, the ultrasonic sensor senses the distance of the  detected object. This information reaches the Arduino UNO as signals. Once, the Arduino receives the signal, it starts to perform the programmed function. In turn, the motor driver receives a command from the Arduino UNO and works accordingly.

If a person is detected by the IR sensor on right side, the device moves towards the right following the person. Else if the person is detected by the IR on left side, the device moves in left direction preceding the detected person. 

FUTURISTIC IDEAS:

My development can be further implemented for future uses as well.

# My idea of sensing an object and preceding it can be used in railways, as a compartment following the leading one can be done without any actual attachment between them.

# This idea can also be implemented in factories where manpower is usually required for the transport within the factory. We can make automatic trolleys which will be very cheap and economic.

# This can also be implemented in the medical field. Here, always manpower is used for the victims or the people who need to be assisted by someone for their movement. This idea gives a solution for that complication.

# In airports, the huge luggage of the passengers is being transported by automobiles and also by manpower. This can be overcome by this technique.