Describe about the Competency Demonstration Report for Conducting Project.
Characteristics of the Project
The project was based on developing a system for parking of cars which would be suitable and practical for Indian society. As we know that there are already some systems which are using technologies such as multi floor parking system and automated parking area system. However, these systems are little bit impractical in context to Indian society as these systems result in extra consumptions of money and power. For this purpose, the aim of our project was to build a “Smart Parking System for cars” that would be a cheap and less expensive system for parking and simple construction as well. In order to achieve this goal, I took the responsibility of selecting the key elements of the project, such as motor (200 Rpm), transformer (12 KV), shaft, capacitor, wheels, diode and springs .
Objectives Developed for the Project
For this particular project, we had formulated the following objectives:
To design an “Automatic Hand Brake System” as an industrial project that meets the specified requirements efficiently
To carry out all the essential mechanical engineering activities in order to apply and utilize the necessary components, perform proper evaluation to check how much the brake work efficiently
To research a solution for car braking problem at congested place by means of developing and experimenting with an automatic hand brake system.
My Area of Work
In this particular project, I performed as a team member for designing the smart hand braking system. I specifically took the responsibility of taking an inventory of all the essential mechanical components and doing a basic mechanical component evaluation, so as to get a good idea to begin with the project. I made the list of the key components required as well as identified the key features to be implemented in the proposed design. I proposed the idea of using a motor with breaking system for the operation of automatic brake mechanism.
My Responsibilities in the Project
In this project, I had performed the following duties and responsibilities:
I designed the basic sketch of the block diagram of the proposed automatic hand brake system
I understood and applied the primary working principle behind the function of the proposed system
I defined the role of the sensor in the main implementation mechanism of the machine
I developed the documentation and presentation report on our venture that is to be presented to our project guide and mentors
I designed the 3D (three dimensional) diagram of the braking machine using CAD tools
I identified the required characteristics of the major components including the rack and pinion setup, 12V DC motor, relay, microcontroller and IR sensors
Comprehending the Theory of the Project
As we know that hand braking is not occur automatically. There are also some technologies regarding braking of cars like Hand braking and Disc braking. We believe that in a country like us where we do not have as much efficient equipment that we use in car, so we require an accurate and reliable system. The main purpose of this project was to develop a system which is simple in operation and cheap but at the same time efficient and reliable. For this purpose, we implemented two motors on brake with 200 rpm each and one motor of 500 rpm for running front wheel and the brake is applied is the ignition goes off.
Engineering Knowledge and Skills Applied in the Project
I used a simple D.C motor of speed 200 rpm is used for the rotation of pinion in the Rack and pinion arrangement and two motor for braking system. Apart from that, I ensured that the rack and pinion arrangement is used for converting rotational motion of motor spindle into translational motion the connecting shaft (Wooden shaft). I selected the rack length to be 70 mm and the breadth to be 5 mm. In addition to that, I identified that the pinion diameter should be 6 mm thickness should be 5 mm. Furthermore, we unanimously decided to use the rack and pinion assembly cover made of aluminum of 18 x 25 mm dimension. Additionally, we gathered the other parts of the assembly that are the moving centre tube and outer casing tube. I specifically undertook the responsibility of designing and developing the basic block diagram of the automatic hand brake system, which is depicted in the figure below:
Figure 1: Block Diagram of Automatic Hand Brake System
Accomplishment and Task Performed
I studied and worked on successfully achieving the fundamental working procedure by implementing the sensor that is aimed to provide the sensing direction to the braking system. I collaborated with my teammates to work on implementing the rack and pinion so that it is activated to be able to lift the hand and disengages with the help of spring tension and push lock. Besides that, I explained the primary role of the sensor is sending the signal to the control circuit then the vehicle is in resting mode. After detecting whether the ignition is ON or OFF as confirmed by the sensors, the control unit releases the brake.
Identified Issues and Their Solutions
We faced a slight issue with the working of the springs that are attached at the ends of the components and interlinked with the hand brake lever at center. Apart from that, there were certain initial difficulties in determining the power supply method.
However, we successfully overcame the difficulties by carrying out extensive research and investigation as well as approaching and taking suggestions from our project guide. I ultimately actuated the hand brake using rank, pinion and the sensors based on certain conditions. I implemented the sensor in the proper way so that it signals the circuit board to directly drive the motor.
Plan for Producing Creative and Innovative Work
I conducted extensive research and study to successfully apply a solution, which is less time consuming, cheap, uses simple mechanism as well as ensures easy braking system. I proposed to use full wave rectifier circuit for supply current only in one direction. For that, we used a capacitor of 1000 µF and 6.3 Volt supply in switch control board. Apart from that, we decided to use DP-DC switches for rotating the motors in clockwise and anti clock wise directions. In the model 4 no. of D.C motors of 60 rpm each is employed in all the four wheels. Parallel connection of motors in a single axle is made so that movement in all four directions can be smooth.
I successfully collaborated and coordinated with my fellow team members to achieve the objectives of the project. I utilized my strong communication and interpersonal skills to carry out the individual activities in an efficient and timely manner. Furthermore, I maintained a consistent approach in updating our project guide about the status and progress of our project work.
As the ignition start, the front wheels start rotating with the help of rotating motor attached with the rotating shaft. The wheels move in both directions clockwise as well as in anti -clock wise direction. A power supply is attached with motor to provide continuous electricity to motor. As ignition stops, within one or half second the brake will be applied automatically with the help of braking motor attached with the brake. The application of brake is so quick due to which this mechanical system is so efficient. Power supply is provided by the transformer, when excess amount of energy is delivered then the capacitor is used to store the extra amount of energy. The typical layout of the model is shown in the figure:
Figure 2: Primary Design of the Model
Conducting the Project to Meet its Requirement
As an active team member of the project, I contributed my mechanical engineering knowledge and skills to achieve a working solution to the car braking problem by designing an Automatic Smart hand brake system that is simple to operate, less time consuming, cheap as well as adequately reliable. Furthermore, it significantly simplifies the process of braking at a minimum distance very easily.
My Contribution to Work
I determined to use two separate motors to operate the brake automatically. I ensured that the power for central motor is supplied from battery of the car. I explained that the smart parking system will be implemented with four wheel drive system. I ensured that our experiment be a successful one in terms of providing a reliable, efficient solution that it can be easily operated in less time. In addition, I ensured that our main motivation of making the system was to make the driver feel less stress in using this system by means of designing the braking that was automatically done.