Wheelchair Design Research Articles

Design and development of smart AI-based voice assistive ergonomic commode wheelchair for mobility and rehabilitation

This study focuses on enhancing assistive devices for the elderly and disabled, primarily addressing the challenges associated with traditional wheelchairs. While wheelchairs are widely used for basic mobility, the research identifies several issues in existing products, such as a lack of attention to ergonomic features, anthropometric principles, and limited technological interventions. One major concern is the discomfort experienced by users over extended periods, especially when essential design elements like height and back adjustments are neglected. Another challenge highlighted is the issue of defecation, particularly in the absence of a caregiver. This dependency on caretakers can be mentally burdensome for users, raising privacy concerns during such personal activities. To address these issues, this research proposes a solution that integrates ergonomic features and incorporates low-cost technological interventions, including artificial intelligence-based voice assistance. The ultimate goal of this paper is to design and introduce an AI-based voice-assisted ergonomic wheelchair that not only supports basic mobility but also ensures comfort over extended periods. The proposed solution aims to incorporate a commode feature for defecation within a smart ergonomic wheelchair equipped with voice assistance and provide comfort to the user(s). The design prioritizes anthropometric dimensions, ensuring comfort and convenience for users across various age groups. Employing SolidWorks software, a stable and robust model has been designed, and its durability was assessed through stress analysis using the SolidWorks simulation tool by applying a 981 Newton load on the wheelchair's frame using two different materials (steel and aluminum). The maximum stress value is less than the yield strength, and the deformation is 2.57 e+00 mm for the steel frame, indicating that the design is stable and durable compared to the aluminum structure. The proposed voice-assistive, ergonomic, AI-based wheelchair with a commode cavity is a revolutionary development for the healthcare sector in terms of innovation.

Stair Climbing Electric Wheelchair

From 18 century many types of wheelchairs had been designed, by developing its functionality. Our project focuses on addressing the mobility challenges faced by individuals with disabilities, particularly those who encounter difficulties navigating staircases. The project introduces a novel solution in the form of an electric stair- climbing wheelchair designed to provide enhanced accessibility in both indoor and outdoor environments. The wheelchair incorporates innovative technologies, including electric motors and intelligent control systems, to enable seamless and safe navigation on various types of stairs. The important parts of this product are conveyor belt, frame and driving mechanism climbing wheelchair for regular use by old disabled people. The design of frame will be done by considering various loads, stresses at various positions. The main factor of wheelchair are the angle of stair and center of gravity of whole system. The design process involves considerations for user comfort, safety, and ease of operation, with a particular emphasis on accommodating diverse user needs. Through a combination of both electrical and mechanical engineering principles and modern electronics, the wheelchair is equipped to ascend and descend stairs smoothly, offering a versatile solution for individuals with mobility impairments. We also plan to explore user feedback and ergonomic evaluations to refine the wheelchair's design and functionality. Preliminary testing would be done to demonstrates the feasibility and effectiveness of the proposed solution in real-world scenarios. The findings of this study contribute to the ongoing efforts to improve the quality of life for individuals with disabilities by expanding their mobility options and promoting inclusivity in various environments.

Application of Sensor Technology in Wheelchair Sports for Real-Time Data Collection during Training and Competition and for Assessment of Performance Parameters: A Systematic Review and Future Directions.

This review reports on the use of sensors in wheelchair sports to monitor and analyze performance during match and training time. With rapid advancements in electronics and related technologies, understanding performance metrics in wheelchair sports is essential. We reviewed nine studies using various sensor types, including electric motors, inertial measurement units, miniaturized data loggers with magnetic reed switches, and smartphones with inbuilt accelerometers and gyroscopes, operating at frequencies from 8 Hz to 1200 Hz. These studies measured parameters such as angular and translational velocities, distance, number of starts/pushes, and other performance indicators in sports such as basketball, rugby, tennis, and racing. Despite differences in sport types and methodologies, most studies found sensor-derived data effective for assessment of performance. Future developments and research in this field should focus on multi-sensor systems that could provide real-time match analysis and deeper insights into performance metrics. Overall, sensor technologies show significant potential for improving wheelchair sport performance diagnostics, contributing to better athlete training and future wheelchair design, and enhancing competitive outcomes. This review emphasizes the need for continued innovation and standardization in applying sensor technologies in wheelchair sports.

Ergonomic Pad Design of IoT-Based Portable Electric Wheel-chair

Background and Aims: Wheelchairs are a basic necessity for people with disabilities, especially people with physical disabilities. Although conventional wheelchairs have aided the mobility of people with disabili-ties, they are limited in scope due to physical exhaustion and health problems from sitting in wheelchairs for a long time. This research is important to develop seatback and cushion features for Health Electric Wheelchair Portable IoT-Based wheelchairs, for easy and comfortable mobil-ity for people with disabilities. The development of wheelchairs aims to reduce the negative im-pact of prolonged immobilization on people with physical disabilities. Methods: Research & Development method. The development stage: 1). The development of pads for Health Electric Wheelchair Portable IoT-Based seatback and cushion needed by wheelchair users; 2). Development of expert-validated Health Electric Wheelchair Portable IoT-Based ergonomics and seatback in accordance with the needs of wheelchair users to improve physical independence; 3). Modify components and equipment for Health Electric Wheelchair Portable IoT-Based cushion and seatback. Results: The result of this development of this wheelchair pays attention to ergonomic design by developing seatback and chair features for Health Electric Wheelchair Portable IoT-Based wheelchairs to provide safety and comfort when using wheel-chairs, especially physical disability. Conclusion: The development of cushion and seatback on wheelchairs can reduce the negative impact of immobilization on people with physical disabilities and is able to provide broad access for users to mobilize on wheelchairs and can adjust to the ergonomics of each user's body.

Structural Design and Analysis of Portable Intelligent Wheelchair for Knee Rehabilitation

In order to address the issues of inconvenience, high medical costs, and lack of universality associated with traditional knee rehabilitation equipment, a portable intelligent wheelchair for knee rehabilitation was designed in this study. Based on the analysis of the knee joint's structure and rehabilitation mechanisms, an electric pushrod-driven rehabilitation institution was developed. A multi-functional module was designed with a modular approach, and the control of the wheelchair body and each functional module was implemented using an STM32 single-chip microcomputer. A three-dimensional model was established using SolidWorks software. In conjunction with Adams and Ansys simulation software, kinematic and static analyses were conducted on the knee joint rehabilitation institution and its core components. A prototype was constructed to verify the equipment's actual performance. According to the prototype testing, the actual range of motion for the knee joint swing rod is 15.1°~88.9°, the angular speed of the swing rod ranges from -7.9 to 8.1°/s, the angular acceleration of the swing rod varies from -4.2 to 1.6°/s², the thrust range of the electric pushrod is -82.6 to 153.1 N, and the maximum displacement of the load pedal is approximately 1.7 mm, with the leg support exhibiting a maximum deformation of about 1.5 mm. The intelligent knee joint rehabilitation wheelchair meets the designed functions and its actual performance aligns with the design criteria, thus validating the rationality and feasibility of the structural design.

Wheelchair satisfaction and recommended improvements of manual wheelchairs in the UK

Purpose of the article The aim of this study was to determine user satisfaction with manual wheelchairs in the United Kingdom and to determine areas that could be improved to help drive future design and development. Materials and Methods Manual wheelchair users, aged 18-65 years old living in the United Kingdom, were invited, to complete an online cross-sectional questionnaire. The link to the questionnaire was distributed using a range of methods to charities, organisations and wheelchair user groups via invitation by email and social media. Responses were gathered from 122 respondents and analysed using descriptive statistics, cross-tabulation and content analysis. Results Respondents felt comfort (39.3%), weight (35.4%), manoeuvrability (34.3%) and durability (30.7%) were the most important features of a wheelchair. Seventy percent of respondents that were “not at all satisfied” with their current wheelchair were fitted by the National Health Service (NHS, X2 = 42.39, p < 0.001). Ninety percent of respondents who were “not at all satisfied” with their current wheelchair experienced issues with comfort (X2 = 17.82, p = 0.001). Sixty percent who were “not satisfied at all” with their wheelchair had not chosen their wheelchair (X2 = 25.15, p < 0.001). Conclusion Wheelchair satisfaction was largely determined by comfort, location of the users’ wheelchair fitting (for example the NHS) and users choosing their own wheelchair. Future wheelchair designs should utilise a user centred and inclusive design approach to cater for a wider range of individual needs and requirements.

Design and Fabrication of Offroad Electric Wheelchair

This paper presents the design, development, and testing of an innovative Off-Road Electric Wheelchair (OREW) aimed at addressing the limitations of conventional electric wheelchairs that primarily cater to indoor use and paved surfaces. By focusing on off-road capabilities, the OREW project seeks to enhance the quality of life for individuals with mobility impairments, enabling them to explore outdoor environments and participate in various activities. The OREW has the potential to promote social inclusion, provide opportunities for recreation, exercise, and exploration, and significantly contribute to overcoming accessibility barriers faced by people with disabilities

SOLAR BASED WHEEL CHAIR FOR DISABLED

The Solar Based Wheelchair for Disabled (SBWCD) is a groundbreaking project aimed at enhancing mobility and independence for individuals with disabilities by harnessing the power of solar energy. Traditional wheelchairs often rely on manual propulsion or battery-powered motors, which can be limiting in terms of range, accessibility to charging stations, and environmental impact. In response to these challenges, the SBWCD project introduces a novel approach by integrating solar panels into the design of wheelchairs to harness solar energy and convert it into electrical power for propulsion. This innovative solution offers numerous benefits, including extended range, reduced reliance on grid electricity, and decreased carbon footprint. The SBWCD features a lightweight and durable frame equipped with high-efficiency solar panels mounted on the backrest and armrests, maximizing exposure to sunlight while maintaining user comfort and ergonomics. The solar panels are connected to an onboard battery system, which stores excess energy generated during daylight hours for use during periods of low sunlight or at night. This hybrid power system ensures continuous operation of the wheelchair regardless of environmental conditions, providing users with greater autonomy and freedom of movement. Moreover, the SBWCD is designed with user-centric features and accessibility in mind. Adjustable seating, armrests, and footrests accommodate users of varying sizes and preferences, while ergonomic controls and intuitive interfaces ensure ease of operation for individuals with limited mobility or dexterity. Additionally, safety features such as anti-tip mechanisms, seat belts, and obstacle detection systems enhance user confidence and mitigate risks associated with wheelchair use in diverse environments. In summary, the Solar Based Wheelchair for Disabled (SBWCD) project represents a significant advancement in assistive technology, offering a sustainable and user-friendly solution for individuals with disabilities. By harnessing the abundant and renewable energy of the sun, SBWCD empowers users to navigate their surroundings with greater independence, efficiency, and environmental consciousness. As the demand for accessible and eco-friendly mobility solutions continues to grow, the SBWCD project serves as a beacon of innovation and inclusivity in the field of assistive technology.

Design of Hand Gesture Control Wheel Chair

This study designated a wheelchair which can be meticulous using the user hand gesture. The purpose of this research was to come up with a hand gesture powered wheelchair system intended to provide assistance with the use of hand directions, which would allow users to travel efficiently and with greater ease. The system is made up of various electronics components such as the microcontroller, accelerometer, Bluetooth model, ultrasonic sensor, motor driver, among others. The microcontroller is programmed. The transmitter circuit board is made up of accelerometer sensor like ADSL335 which is able to sense three parameters. The microcontroller forms the main part or the brain of the system, and performs most of the functions. The microcontroller sends the readings sensed by the hand to the Bluetooth transmitter. The ultrasonic sensor detected obstacles, also sent the distance measured to the microcontroller. The microcontroller processed the information to the motor driver. The motor driver then powered the motors to either move forward or backward. It was observed that when the system was activated, the movement of the Wheelchair immediately start to follow the orientation of the user’s hand. The wheelchair was able to be perform five (5) different gestures. The gesture follows the range that had been set. However, this range depends on the position of the accelerometer.

Design and Development of a Wheelchair Prototype

The rate of people with disabilities in Vietnam is about 7% out of a total of 98 million. Wheelchairs are popular assistive devices for disabled people and are often found in many places around the world, including Vietnam. This study proposes a novel design of a prototype electric wheelchair to support people with disabilities in Vietnam. The electric wheelchair model was successfully simulated and manufactured, fully meeting the proposed technical requirements. The proposed model works well and is suitable for the shape and physical strength of Vietnamese people.

Arduino based Voice-Controlled Wheel Chair

The integration of key components in a voice-controlled wheelchair designed for individuals with physical disabilities. It highlights the use of Arduino microcontrollers to interpret voice commands, translating them into signals for motorized movement. A Bluetooth module facilitates communication between the device issuing commands and the Arduino. The main focus is on achieving a 180-degree rotation of the wheelchair, which necessitates configuring the Arduino to control both front and back wheels for directional movement and speed. Motorized motion is enabled through a system of chain and sprockets with cycle tires, ensuring smooth and stable traversal across different surfaces. This abstract encapsulates the essential elements of the wheelchair's design and functionality, emphasizing its ability to empower users through intuitive control and reliable mobility assistance. The integration of a Bluetooth module facilitates seamless communication between the controlling device and the wheelchair. Key emphasis is placed on the wheelchair's ability to execute a 180-degree rotation, necessitating precise configuration of the Arduino to manage both front and back wheels for directional control and speed modulation. The inclusion of a chain and sprockets system, coupled with cycle tires, ensures smooth and stable mobility across diverse terrains, ultimately enhancing the user's independence and quality of life.

Experimental Study of Persons with Disability, Wheelchairs, and Car Interaction

Driving a car independently significantly enhances the quality of life, particularly for individuals with mobility disabilities. Wheelchair users face several challenges when loading and unloading their wheelchairs into and from vehicles, hindering their personal transportation independently. The influence of wheelchair design on the wheelchair and car compatibility for self-loading and unloading hasn't been fully explored in the scientific literature; therefore, this study investigates the impact of various design features found in modern wheelchairs on their suitability for disabled drivers. Four types of wheelchairs were compared in this study; two participants with paraplegia, one male and one female, participated in the tests. Video recordings captured the procedures for getting in and out of the vehicle. Subsequent results analysis involved breaking down these procedures into steps and comparing them. The study demonstrated that times of independent entry into a car and loading of a wheelchair ranged from 48 to 74 seconds, while exiting the vehicle and loading a wheelchair phase took between 56 and 86 seconds. A key takeaway from this research is that dividing the wheelchair frame, the largest and heaviest component, into two parts facilitates loading and unloading processes. However, this may slightly increase the duration of these activities. Detaching the seat aids more individuals with limited upper body strength.

Conceptual design of trail wheelchair with emphasis on ergonomic evaluation

Conceptual design of trail wheelchair with emphasis on ergonomic evaluation

Design of Wheelchair Drive Unit Capable of Driving on Roads and Obstacles with Shape Conversion

Wheelchairs are widely used globally and are essential for providing autonomy and mobility to elderly and disabled people who have movement restrictions. Manual wheelchairs require operation through turning the wheels or pushing the wheelchair directly, thus posing mobility limitations for the user and caregiver. In contrast, electric wheelchairs, when used by the user, allow for improved flexibility by operating the wheelchair through a single control mechanism. However, the use of electric wheelchairs poses challenges in accessing areas with stairs and curbs, limiting the range of activity and thereby diminishing the quality of life for users and those reliant on electric wheelchairs. The electric wheelchair developed in this research incorporates a single motor for lightweight design. It uses a wheel travel variation actuator, eliminating the need for synchronization and allowing for low-power operation. This design reduces power loss from the caterpillar’s idling during wheel movement and includes the implementation of a pulley system. The optimal pulley belt length was calculated, and a deceleration device was installed inside the caterpillar, enabling a design that is compact, lightweight, and capable of high deceleration. On paved roads and flat terrain, the electric wheelchair is designed for high-speed travel using two pairs of front omni wheels and drive wheels. For terrains with stairs, speed bumps, unpaved roads, and unavoidable obstacles, the wheelchair is powered by caterpillars. The electric wheelchair developed through the research presented in this paper has verified the reliability of its transmission system through gear stress and deformation analysis. Additionally, an electric wheelchair based on the proposed concept was constructed to validate the drivability, safety, operability, and convenience of its driving unit. Furthermore, a user rode the constructed electric wheelchair to confirm that there were no issues with its drivability.

Prevalence of Coccydynia among Wheelchair Users Due to Prolong Sitting

Background: Coccydynia, characterized by pain in or around the coccyx, is a condition that is particularly prevalent among wheelchair users due to prolonged sitting. Previous studies have highlighted various factors contributing to coccydynia, including extended sitting on hard surfaces, obesity, and gender-specific susceptibility. Objective: The primary objective of this study was to determine the prevalence of coccydynia among wheelchair users, with a focus on identifying key risk factors such as prolonged sitting, gender, and sitting surface hardness. Methods: This cross-sectional study utilized convenience sampling to gather data from 250 wheelchair users across private/government special education institutes, hospitals, rehabilitation centers, and homes in the South Punjab region. Participants aged 15-60 years using a wheelchair for more than one year were included, excluding those with spinal cord injuries, spina bifida, coccyx fractures, sensory loss, psychological issues, or postpartum women. Data was collected via a self-structured questionnaire, Numeric Pain Rating Scale (NPRS), and Visual Analog Scale (VAS). Statistical analysis was conducted using SPSS version 25, focusing on frequencies, percentages, cross-tabulation, and Chi-square tests. Results: The study found that 72.4% of participants experienced tailbone tenderness, with a significant association between longer wheelchair usage hours and increased tenderness (P &lt; 0.001). A majority of participants (76%) reported tailbone pain, with 72.4% experiencing tenderness. The prevalence of coccydynia was higher in females, and most participants did not use a cushion despite the prolonged sitting. The pain was predominantly described as an ache/dull sensation (89.6%), and it worsened after prolonged sitting in 90.8% of cases. Conclusion: Coccydynia is a prevalent condition among wheelchair users, influenced by prolonged sitting, gender, and the hardness of the sitting surface. The study emphasizes the need for educational interventions, ergonomic wheelchair designs, and the usage of specialized cushions to mitigate the risk and alleviate symptoms.

A slanted castor wheel enables pushing manual wheelchairs from the side to improve social interaction.

Traditional wheelchairs are pushed from behind the occupant, which hinders eye contact and communication. It was proposed that the wheelchair be pushed from the side using a push bar to place the caregiver beside the occupant. However, this method requires the caregiver to exert continuous effort to maintain a straight trajectory because the force at the lateral push location generates a moment. This study explores simple modifications to the front castor wheel of the wheelchair that allow pushing it from the side without additional effort. We used a three-dimensional dynamic model of the castor wheel to predict the effects of altering its dimensions and rake, cant, and bank angle and present a simplified steady-state solution. Experimental results support the model's predictions, and a proof-of-concept experiment with a wheelchair showed that it is possible to push a wheelchair from the side without increasing forces or moments. The results also confirmed that the lateral ground reaction force generated on the castor wheel is proportional to the normal force and the cant angle, which can counter the moment caused by the lateral push location. The implications of this model extend beyond wheelchair design and can be applied to other applications that use castor wheels, such as robotics, trolleys, and walkers.

Design and Implementation of an Autonomous Wheelchair with Medical Kit Access Using Raspberry Pi

Concrete is a fundamental construction material that is continually evolving to enhance its performance and sustainability. This research explores the potential of incorporating natural pumice powder and polypropylene as partial substitutes for cement in M20-grade concrete. The aim is to assess how these alternative materials influence concrete properties and sustainability. Through a comprehensive evaluation, the study provides valuable insights into improving the characteristics and environmental impact of concrete structures. This experimental study examines properties such as split tensile strength, compressive strength, and flexural strength of concrete specimens after curing periods of 7, 14, and 28 days. Concrete mixes with varying proportions of pumice powder (5%, 10%) and polypropylene (5%, 10%), as well as their combinations, are meticulously prepared and tested. The results indicate that adding pumice powder and polypropylene positively affects the strength properties of concrete, with some mixtures performing better than conventional concrete. The analysis reveals the underlying mechanisms contributing to enhanced strength, emphasizing the potential of these materials to boost the durability and long-term sustainability of concrete structures. These findings contribute to ongoing efforts to develop eco-friendly and highly durable concrete, promoting advancements in construction engineering.

Design of Stair-Climbing Electric Wheelchair With Tri-Spoke Wheel and Supporting Leg

Design of Stair-Climbing Electric Wheelchair With Tri-Spoke Wheel and Supporting Leg

Design and Implementation of an Autonomous Wheelchair with Medical Kit Access Using Raspberry Pi

This paper presents an autonomous wheelchair system designed to enhance the mobility of elderly individuals and people with disabilities through advanced automation and artificial intelligence. Recognizing the importance of independent movement for promoting physical and psychological well-being, this system addresses the challenges faced by those with limited mobility. The wheelchair leverages various sensors to minimize the need for human intervention, thereby fostering autonomy and reducing reliance on caregivers. The system includes an Android interface connected via Bluetooth, allowing for intuitive user interaction and control. Utilizing Raspberry Pi technology, the research aims to create a reliable framework that can adapt to user needs through data processing and analysis. Additionally, the system enables effective communication through head-mounted support, allowing users to record and relay information. Ultimately, this autonomous wheelchair aims to improve mobility and confidence for individuals with disabilities while enhancing their overall independence and quality of life.

Design of an Electro-Hydraulic Wheelchair for Stair Climbing Rehabilitation with a Small Turning Radius

Design of an Electro-Hydraulic Wheelchair for Stair Climbing Rehabilitation with a Small Turning Radius