Development of Crawler Stair Climber using Guide Rail

2002 ◽  
Vol 14 (6) ◽  
pp. 531-537
Author(s):  
Yasuhiro Yamada ◽  
◽  
Yoshinori Segawa ◽  
Kazuhiro Ookoudo ◽  
Yoshiaki Komura ◽  
...  
Keyword(s):  
Tilt Angle ◽  
Low Cost ◽  
Stair Climbing ◽  
Free Society ◽  
Guide Rail ◽  
Wheelchair Users ◽  
Side Edge ◽  
Stair Climber ◽  
Barrier Free

Welfare equipment is being developed for the projected barrier-free society. Stair climbers developed to help wheelchair users climb stairs include multileg, wheeled and crawler types. Stair climbers in practical use, however, may make traveling unstable depending on the stair or be expensive, indicating a need for improvement. This paper proposes a crawler stair climber, named ESCAL-F, that uses a small guide rail with a tooth belt installed at the side edge of stairs and a tooth belt for the crawler in which belts mesh to enable stair climbing. ESCAL-F realizes stable stair climbing with low cost. This paper focuses on design and tilt angle control of ESCAL-F.

Development of Stair-climbing Wheelchair

2002 ◽  
Vol 14 (6) ◽  
pp. 524-530 ◽  
Author(s):  
Satoshi Hashino ◽  
Keyword(s):  
Daily Life ◽  
Cost Effective ◽  
Stair Climbing ◽  
Free Society ◽  
Powered Wheelchair ◽  
Barrier Free

Construction of barrier free society is desired especially for elderly and handicapped who need to use wheelchair in daily life. Stair climbing is the hardest barrier for those people. Supply of stair lift method is contribution to provide joy and satisfaction in life of those people. By using our developed crawl-type mechanism on powered wheelchair, they can easily and effectively climb up and down stairs. These system are composed of two subsystems, a few reformed powered wheelchair, drive guide and traction guide attached to stair wall. Presented system is cost effective compared with other existing methods such as elevators, escalators and conventional stair lifts.

A low-cost, portable system for the assessment of the postural response of wheelchair users to perturbations

1999 ◽  
Vol 7 (4) ◽  
pp. 435-442 ◽  
Author(s):  
D.G. Kamper ◽  
T.C. Adams ◽  
S.I. Reger ◽  
M. Parnianpour ◽  
K. Barin ◽  
...  
Keyword(s):  
Low Cost ◽  
Postural Response ◽  
Wheelchair Users ◽  
Portable System

Design, Implementation and Characterization of a Low-Cost Stair-Climbing and Obstacle Dodging Robot for Emergency Situations

2020 ◽  
pp. 236-247
Author(s):  
Rafaela Villalpando-Hernandez ◽  
Cesar Vargas-Rosales ◽  
Rene Diaz-M. ◽  
J. C. Armendariz-Nuñez ◽  
E. E. Castañeda-Hernandez ◽  
...  
Keyword(s):  
Low Cost ◽  
Stair Climbing ◽  
Emergency Situations

scholarly journals Application of Alber's principle to develop a device supporting wheelchair in stair climbing

2013 ◽  
Vol 16 (2) ◽  
pp. 5-12
Author(s):  
Nghin Van Dang ◽  
Co Pham ◽  
Thong Hoang Pham ◽  
Phuc Dang Ho
Keyword(s):  
Simple Structure ◽  
Low Cost ◽  
Total Weight ◽  
Stair Climbing ◽  
Disabled People ◽  
And Control ◽  
Climbing Stairs

This paper presents developing Alber principle for machine supporting wheelchair in climbing stairs. The designed machine can support wheelchair and disabled people with total weight 80 kg climb up and down most of stairs and with speed 10-15 stairs per minute. Moving wheelchair and disabled people need assistant person who will hold handle and control the machine. The machine is designed with a simple structure, manufactured with low cost and simple controlling. Therefore the machine can be upgraded and manufactured in future.

scholarly journals LOW COST SUBSTRATE BASED COMPACT ANTENNAS FOR 4G/5G SIDE-EDGE PANEL SMARTPHONE APPLICATIONS

2020 ◽  
Vol 91 ◽  
pp. 145-152
Author(s):  
Issmat Shah Masoodi ◽  
Insha Ishteyaq ◽  
Khalid Muzaffar ◽  
Muhammad Idrees Magray
Keyword(s):  
Low Cost ◽  
Smartphone Applications ◽  
Side Edge ◽  
Low Cost Substrate ◽  
Compact Antennas

Effect of process parameters on temperature and force distribution during friction stir welding of armor-marine grade aluminum alloy

2020 ◽  
Vol 235 (1-2) ◽  
pp. 144-154 ◽  
Author(s):  
Shubham Verma ◽  
Joy Prakash Misra
Keyword(s):  
Friction Stir Welding ◽  
Real Time ◽  
Process Parameters ◽  
Tilt Angle ◽  
Welding Speed ◽  
Low Cost ◽  
Maximum Force ◽  
Maximum Temperature ◽  
Force Distribution ◽  
Friction Stir

This research investigates the effect of process parameters on real-time temperature and forces distribution during friction stir welding of AA7039. Experiments are conducted at different rotational speed, welding speed, and tilt angle conditions. For the experimentation, a low-cost real-time force-measuring fixture is indigenously developed in-house. However, eight K-type L-shaped thermocouples are used to examine the real-time temperature distribution. The forces in the z-direction are of a higher magnitude than the x-direction. The maximum force in the z-direction of 3.25 kN is witnessed for 2° tilt angle and a minimum of 2.1 kN for 26 mm/min of welding speed. The maximum force in the x-direction of 0.97 kN is obtained at 2° tilt angle and a minimum of 0.27 kN is obtained at 1.3° tilt angle. The maximum temperature of 390 °C is observed at 1812 r/min, whereas a minimum of 283 °C is observed at 43 mm/min of welding speed. The variations in temperature and force distribution during friction stir welding are also evaluated by utilizing two phenomenological models.

scholarly journals Exploration of Indoor Barrier-Free Plane Intelligent Lofting System Combining BIM and Multi-Sensors

2020 ◽  
Vol 12 (20) ◽  
pp. 3306
Author(s):  
Zijian Zhang ◽  
Xiaojun Cheng ◽  
Bilian Yang ◽  
Dong Yang
Keyword(s):  
Remote Sensing ◽  
Construction Projects ◽  
Low Cost ◽  
Rapid Development ◽  
Information Modeling ◽  
Sensor Data ◽  
Measurement Unit ◽  
Single Chip ◽  
Free Plane ◽  
Barrier Free

Lofting is an essential part of construction projects and the high quality of lofting is the basis of efficient construction. However, the most common method of lofting currently which uses the total station in a multi-person cooperative way consumes much manpower and time. With the rapid development of remote sensing and robot technology, using robots instead of manpower can effectively solve this problem, but few scholars study this. How to effectively combine remote sensing and robots with lofting is a challenging problem. In this paper, we propose an intelligent lofting system for indoor barrier-free plane environment, and design a high-flexibility, low-cost autonomous mobile robot platform based on single chip microcomputer, Micro Electro Mechanical Systems-Inertial Measurement Unit (MEMS-IMU), wheel encoder, and magnetometer. The robot also combines Building Information Modeling (BIM) laser lofting instrument and WIFI communication technology to get its own position. To ensure the accuracy of localization, the kinematics model of Mecanum wheel robot is built, and Extended Kalman Filter (EKF) is also used to fuse multi-sensor data. It can be seen from the final experimental results that this system can significantly improve lofting efficiency and reduce manpower.

scholarly journals RAILWAY SYSTEM ACCESSIBILITY EVALUATION FOR WHEELCHAIR USERS: CASE STUDY IN THE CZECH REPUBLIC

Transport ◽  
2014 ◽  
Vol 32 (1) ◽  
pp. 32-43 ◽  
Author(s):  
Jaroslav Matuška
Keyword(s):  
Czech Republic ◽  
Rail Transportation ◽  
The Czech Republic ◽  
Wheelchair Users ◽  
Accessibility Evaluation ◽  
Train Services ◽  
Weak Points ◽  
Railway System ◽  
Barrier Free

This paper deals with accessibility of rail transportation as a system. Presented methods bring ways of rail infrastructure and train accessibility evaluation. Applied two-stage model enables evaluation of departure halls accessibility. The level of train accessibility is defined by coefficients of time and direction non-uniformity. While opportunities for barrier-free travelling are relatively balanced in monitored regions, coefficients show a time imbalance in the results. Opportunity to travel barrier-free (according to the non-uniformity coefficients) shows that there are fluctuations at weekends and on weekdays. These are not of crucial importance. However, the train services are barrier-free particularly for travelling on long distances, whilst suburban and regional ones are still mostly inaccessible for wheelchairs, which is not very favourable. Since 2010 the accessibility level has improved in this area in the Czech Republic. Comparison with neighbouring countries showed strong and weak points of guaranteed barrier-free services in each country.

scholarly journals Design and validation of a low cost, high-capacity weighing device for wheelchair users and bariatrics

2016 ◽  
Vol 29 (2) ◽  
pp. 61-67 ◽  
Author(s):  
Brandon A. Sherrod ◽  
Dustin A. Dew ◽  
Rebecca Rogers ◽  
James H. Rimmer ◽  
Alan W. Eberhardt
Keyword(s):  
Low Cost ◽  
High Capacity ◽  
Wheelchair Users

scholarly journals Use of a Low-Cost, Chest-Mounted Accelerometer to Evaluate Transfer Skills of Wheelchair Users During Everyday Activities: Observational Study (Preprint)

2018 ◽  
Author(s):  
Giulia Barbareschi ◽  
Catherine Holloway ◽  
Nadia Bianchi-Berthouze ◽  
Sharon Sonenblum ◽  
Stephen Sprigle
Keyword(s):  
Predictive Accuracy ◽  
Multinomial Logistic Regression ◽  
Low Cost ◽  
Relevant Literature ◽  
Machine Learning Algorithms ◽  
Support Vector ◽  
Accelerometer Data ◽  
Wheelchair Users ◽  
Limb Injuries ◽  
Evaluation And Monitoring

BACKGROUND Transfers are an important skill for many wheelchair users (WU). However, they have also been related to the risk of falling or developing upper limb injuries. Transfer abilities are usually evaluated in clinical settings or biomechanics laboratories, and these methods of assessment are poorly suited to evaluation in real and unconstrained world settings where transfers take place. OBJECTIVE The objective of this paper is to test the feasibility of a system based on a wearable low-cost sensor to monitor transfer skills in real-world settings. METHODS We collected data from 9 WU wearing triaxial accelerometer on their chest while performing transfers to and from car seats and home furniture. We then extracted significant features from accelerometer data based on biomechanical considerations and previous relevant literature and used machine learning algorithms to evaluate the performance of wheelchair transfers and detect their occurrence from a continuous time series of data. RESULTS Results show a good predictive accuracy of support vector machine classifiers when determining the use of head-hip relationship (75.9%) and smoothness of landing (79.6%) when the starting and ending of the transfer are known. Automatic transfer detection reaches performances that are similar to state of the art in this context (multinomial logistic regression accuracy 87.8%). However, we achieve these results using only a single sensor and collecting data in a more ecological manner. CONCLUSIONS The use of a single chest-placed accelerometer shows good predictive accuracy for algorithms applied independently to both transfer evaluation and monitoring. This points to the opportunity for designing ubiquitous-technology based personalized skill development interventions for WU. However, monitoring transfers still require the use of external inputs or extra sensors to identify the start and end of the transfer, which is needed to perform an accurate evaluation.

Sign in / Sign up

Export Citation Format

Share Document