We hereby declare that the work presented in this project is the outcome of the investigation and research work carried out by us under the supervision of Md. We also declare that no part of this project and of it elsewhere has been or is being submitted for the award. of any degree. This is to certify that this project and thesis entitled "DESIGN AND CONSTRUCTION OF SMART WHEELCHAIR" is being done by the following students under my direct supervision and this work was carried out by them in the laboratories of the Department of Mechanical Engineering under the Faculty. of Engineering from Sonargaon University in partial fulfillment of the requirements for the degree of Bachelor of Science in Mechanical Engineering.
We would like to express our sincere gratitude to our honorable supervisor Md Mahedy Hasan, Lecturer, Department of Mechanical Engineering, SU who inspired us at every moment. We express our humble gratitude to all the teachers of Mechanical Engineering Department for their support in many ways throughout the project work. We are also grateful to the authors whose valuable research papers and books we have considered as reference in this project paper.
This project is about hand and app controlled wheelchair where the movement of a wheelchair is controlled by hand and Apps given to Arduino. Especially in the case of paralyzed people, the use of the joystick became more difficult due to the hard buttons and the one-sided use of the joystick.
First motorized wheelchair (Electric wheelchair)
Scope and Applications
LITERATURE REVIEW
Literature Review
Osaka University, Japan, has produced an intelligent wheelchair system with two cameras, one facing the user and the second facing forward. The user provides input to the system with head gestures, interpreted by an inward-facing camera. The outward-facing camera tracks targets and allows the user to control the wheelchair with gestures when getting out of the wheelchair.
In NAN, the system knows the initial position and orientation and navigates to the target position and orientation. In a WAN, the system moves to the intended destination, but also recognizes (and avoids) moving objects in the environment. The University of Alcala, Spain, built a wheelchair where they used a test device for different input methods (voice, facial/head gestures, EOG).
Uses machine vision to interpret the user's gaze for wheelchair control and to identify landmarks.
EXISTING SYSTEM
Background
Proposed structure of smart and Bluetooth control wheelchair
We are choosing to design and manufacture a multi-purpose smart chair for the differently abled. The most basic job of the chair is to take input from the user, usually in the form of a Bluetooth Android app control, a small joystick, and decode that movement into power on the wheels to move the person in the preferred direction.
Mechanical Design
Design of chain and motor
- Design of proposed structure of smart wheelchair
- On the basis of an electrical combination
- On the basis of a micro-controlling combination
- Wheel
- PVC Board
- Iron L Angle
- Bread Board
- Li-Po Battery Charger
The model of the wheelchair, designed in Solid Works, is presented as shown in the figure with side and front view. The two partners are held together by a combination of the friction of their threads (with slight elastic deformation), a slight stretching of the bolt and compression of the parts to be held together. A stairwell is stairs, landings, corridors or other parts of the public hall through which it is necessary to pass when going from the entrance floor to the other floors of a building.
The common cable tie, normally made of nylon, has a flexible tape section with teeth that engage a catch in the head to form a ratchet, so that when the free end of the tape section is pulled, the cable tie tightens and does not loosen. . Two enable inputs are provided to enable or disable the device independently of the input signals. The emitters of the lower transistors of each bridge are connected to each other and the corresponding external terminal can be used for the connection of an external sensing resistor.
The charging protocol (such as how much voltage or current for how long and what to do when charging is complete) depends on the size and type of battery being charged. Simple chargers of this type must be manually disconnected at the end of the charge cycle, and some types of batteries either require or may use a timer to cut off the charging current at a specified time approximately when charging is complete. It is an open source platform where anyone can modify and optimize the board according to the number of instructions and tasks they want to achieve.
A reset pin has been added to the board which resets the entire board and takes over the running program in the initial phase. This pin is useful if the board gets stuck in the middle of a running program; Pressing this pin will clear everything in the program and start the program from the beginning. Internal pull-up resistors are used in the board that limit the current excess under the given operating conditions.
More than one ground pin is provided on the table which can be used as per requirement. This pin is incorporated into the board which resets the program running on the board. Instead of physically resetting the table, the IDE comes with a programmatic table reset feature.
Terms for "pushing" a button include pressing, pressing, pressing, slapping, kicking, and punching. , home and commercial. In industrial and commercial applications, push buttons can be connected together with a mechanical. One of the outstanding features of this distance sensor is that it can detect not only the distance between itself and a solid object, but it can also detect liquids (used in the Cheers set).
SOFTWARE ANALYSIS
- Software Description
- Final Wheel Chair Code Complete String voice;
- Choosing C language
- APPLICATION INSTRUCTION
- Block diagram of micro controlling devices with basement setup
- Circuit flow diagram of micro controlling system
- Final assembly
- Measurements of structure
- LOAD ANALYSIS
- Analysis of load
- Reasons to Determine Motor Loading
- Input Power Measurements
- Line Current Measurements
This gives the distance traveled by the ping, out // and return, so we divide by 2 to get the obstacle distance. The pin goes out and back, so to find the object's distance // we take half the distance traveled. Process software is an automated process that simplifies project management and, most importantly, increases project visibility.
It has become one of the most widely used programming languages with C compilers from various vendors available for most existing computer architectures and operating systems. GO#” to the Bluetooth module connected to the circuit. the microcontroller detects "GO", the motor attached to the wheelchair moves FORWARD. When you press the “LEFT” key, the application sends the data in the form of a string in the form of the string “*LEFT#” to the Bluetooth module connected to the circuit.
When you press the “STOP” button located in the center of the remote control, the application sends data in the form of the string “*STOP#” to the Bluetooth module connected to the circuit. Below is the flow diagram of a microcontroller system for designing and manufacturing a smart wheelchair. The entire main parts, components and micro-controllers are successfully assembled according to the desired structure of a push-button smart wheelchair as shown in the figure.
An engine is considered underloaded when it is in the range where efficiency drops significantly with decreasing load. With the measured parameters taken from the hand instruments, you can use Equation 1 to calculate the three-phase power input of the loaded motor. You can then quantify the motor part load by comparing the measured power input under load to the power required when the motor is operating at rated capacity.
PF = Power factor as a decimal equation 2. Pir = Full load input power in kW hp = Nameplate rated horsepower. ηfl = Full load efficiency. Load = Power output as % of rated power Pi = Three-phase measured power in kW Pir = Full load input power in kW Example: Calculation of input power. In the low load region, current measurements are not a useful indicator of load. The nameplate full-load current value applies only to the motor's rated voltage.
If the supply voltage is below that indicated on the motor nameplate, the measured amperage value is correspondingly higher than expected under nominal conditions and must be adjusted downward. The opposite is true if the supply voltage at the motor terminals is above the motor rating.
RESULTS AND DISCUSSION
Results
Discussion
CONCLUSION AND RECOMMENDATION
Conclusion
Recommendation
The weight of the frame can be reduced by using high strength lightweight materials such as composites, carbon fiber. The project can move with a gyroscopic sensor and can attach the camera to inspect outside to disable a person. The motorized wheelchair can stop at the contact of any obstacle in the movement of forward and backward direction using the sonar sensor.
The motorized wheelchair can also be improved, in the case of people suffering from certain paralysis, by using voice or head movements as needed.
