scholarly journals A Wireless Hand Grip Device for Motion and Force Analysis

2021 ◽  
Vol 11 (13) ◽  
pp. 6036
Author(s):  
Victor Becerra ◽  
Francisco J. Perales ◽  
Miquel Roca ◽  
José M. Buades ◽  
Margaret Miró-Julià
Keyword(s):  
Serious Games ◽  
Microelectromechanical Systems ◽  
Computer Applications ◽  
Medical Rehabilitation ◽  
Virtual Object ◽  
Force Measurements ◽  
Force Analysis ◽  
Interaction Forces ◽  
Hand Grip ◽  
Portable Software

A prototype portable device that allows for simultaneous hand and fingers motion and precise force measurements has been. Wireless microelectromechanical systems based on inertial and force sensors are suitable for tracking bodily measurements. In particular, they can be used for hand interaction with computer applications. Our interest is to design a multimodal wireless hand grip device that measures and evaluates this activity for ludic or medical rehabilitation purposes. The accuracy and reliability of the proposed device has been evaluated against two different commercial dynamometers (Takei model 5101 TKK, Constant 14192-709E). We introduce a testing application to provide visual feedback of all device signals. The combination of interaction forces and movements makes it possible to simulate the dynamic characteristics of the handling of a virtual object by fingers and palm in rehabilitation applications or some serious games. The combination of these above mentioned technologies and open and portable software are very useful in the design of applications for assistance and rehabilitation purposes that is the main objective of the device.

scholarly journals MULTIDISCIPLINARIDADE E O DESENVOLVIMENTO DE SERIOUS GAMES E SIMULADORES PARA EDUCAÇÃO EM SAÚDE

2018 ◽  
Vol 4 (4) ◽  
pp. 149-172 ◽  
Author(s):  
Liliane S. Machado ◽  
Thaise Kelly de Lima Costa ◽  
Ronei Marcos de Moraes
Keyword(s):  
Virtual Reality ◽  
Computer Science ◽  
Serious Games ◽  
Computer Applications ◽  
Software Project ◽  
Health Statistics ◽  
Palabras Clave ◽  
Games For Health ◽  
And Training

O desenvolvimento de aplicações computacionais deve ser guiado pelas necessidades do cliente, considerando todas as etapas do projeto de um software. Quando estas aplicações são voltadas para educação em saúde, observa-se a necessidade de abordar aspectos relacionados a pelo menos quatro áreas: educação, saúde, estatística e computação, evidenciando a necessidade de uma abordagem multidisciplinar para a produção de ferramentas efetivas e eficientes para os problemas a que se destinam. Este artigo apresenta e discute etapas consideradas fundamentais no processo de desenvolvimento de serious games e simuladores de treinamento para a saúde baseados em realidade virtual.   PALAVRAS-CHAVE: realidade virtual; jogos em saúde; serious games.     ABSTRACT The development of computer applications must be guided by clients’ needs and must consider all step of software project. It is necessary to integrate knowledge of four areas: education, health, statistics and computer science when those applications are for education in health what makes evident the need of a multidisciplinar approach for the production of effective and efficient tools for the purpose expected. This paper presents and discusses fundamental steps for the development of serious games and training simulators for health based on virtual reality   KEYWORDS: virtual reality; games for health; serious games.     RESUMEN El desarrollo de las aplicaciones informáticas debe guiarse por las necesidades de los clientes y debe considerar todos los pasos del proyecto de software. Es necesario integrar el conocimiento de cuatro áreas: educación, salud, estadística e informática cuando esas aplicaciones son para la educación en salud, lo que hace evidente la necesidad de un enfoque multidisciplinario para la producción de herramientas eficaces y efectivas para el propósito esperado. Este artículo presenta y discute los pasos fundamentales para el desarrollo de juegos serios y simuladores de entrenamiento para la salud basados en la realidad virtual.   PALABRAS CLAVE: realidad virtual, juegos para salud, serious games.  

Nano and Micro Mechanical Measurement of Interaction Forces Between Solid Surfaces

2006 ◽  
Vol 326-328 ◽  
pp. 1-4
Author(s):  
Kyung Suk Kim
Keyword(s):  
Scale Effects ◽  
Measurement Techniques ◽  
Calibration Method ◽  
Lateral Force ◽  
Solid Surfaces ◽  
Lateral Interaction ◽  
Force Measurements ◽  
Interaction Forces ◽  
Size Scale ◽  
Force Calibration

Two different types of experimental methods have beeen developed for measuring lateral interaction forces between two solid surfaces for nano- and micro-meter scale contacts. One is the type of direct measurement methods which typically utilize AFM instrumentations. In the direct lateral force measurements some size-scale effects are commonly observed due to the effects of adhesion and surface roughness. A recent development of a fine AFM lateral force calibration method, a diamagnetic lateral force calibrator, has made it possible to study such size-scale effects systematically. The other type is the field projection method which requires a high resolution measurement of a deformation field near the edge of a contact. For such measurements a comprehensive map of deformation measurement techniques is introduced in a domain of spatial and strain resolutions. This technique provides a way of assessing the non-uniform distribution of the surface interaction forces for nano and micro-meter scale contacts.

scholarly journals Force Analysis and Evaluation of a Pelvic Support Walking Robot with Joint Compliance

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Jiancheng Ji ◽  
Shuai Guo ◽  
Fengfeng (Jeff) Xi
Keyword(s):  
Force Field ◽  
Piecewise Linear ◽  
Linear Method ◽  
Kinematic Model ◽  
Gait Training ◽  
Walking Robot ◽  
Force Analysis ◽  
Interaction Forces ◽  
Joint Compliance ◽  
Pelvic Support

The force analysis of a pelvic support walking robot with joint compliance is discussed in this paper. During gait training, pelvic motions of hemiplegic patients may be excessively large or out of control; however, restriction of pelvic motions is not likely to facilitate successful rehabilitation. A robot-assisted pelvic balance trainer (RAPBT) is proposed to help patients control the range of motion via force field, and force analysis is necessary for the control of the compliant joints. Thus, kinematic model and static model are developed to derive the Jacobian and the relation between the interaction forces and the pelvic movements, respectively. Since the joint compliance is realized through a nontorsional spring, a conventional (linear) Jacobian method and a piecewise linear method are derived to relate the interaction forces with the pelvis movements. Three preliminary experiments are carried out to evaluate the effectiveness of the proposed methods and the feasibility of the RAPBT. The experiment results indicate that the piecewise linear method is effective in the calculation of the interaction forces. Gait with pelvic brace strongly resembles free overground walking and partly decreases motion range via force field. The findings of this research demonstrate that the pelvic brace with joint compliance may provide effective interventions.

A Method to Develop Virtual Reality Platforms for the Medical Rehabilitation of Severe Memory Loss After Brain Stroke

2021 ◽  
Author(s):  
Daniel Lanzoni ◽  
Andrea Vitali ◽  
Daniele Regazzoni ◽  
Caterina Rizzi
Keyword(s):  
Virtual Reality ◽  
Data Management ◽  
Serious Games ◽  
Memory Loss ◽  
Medical Rehabilitation ◽  
Patient Specific ◽  
Medical Monitoring ◽  
Game Logic ◽  
Head Mounted Display ◽  
Brain Stroke

Abstract The paper presents a method to develop Virtual Reality (VR) platforms based on serious games for the rehabilitation of severe memory loss. In particular, it is related to retrograde amnesia, a condition affecting patient’s quality of life usually caused by brain stroke. Nowadays, the standard rehabilitation process consists in showing pictures of patient’s familiar environments in order to recover the memory. Past research works have investigated the use of 3D scanners for the virtualization of real environment and virtual reality for the generation of more immersive interaction to design serious games for neurocognitive rehabilitation. Reached results highlighted a time-consuming development process to interface each new environment with the game logic specifically developed for the serious games. Furthermore, a complete VR platform must also consider the medical monitoring and the data management oriented to a more objective medical assessment. The proposed method allows the design of VR platforms based on patient-specific serious games for memory loss starting from the 3D scanning acquisition of familiar environments. The 3D acquisition is performed using the Occipital Structure Sensor and the Skanect application. A modular procedure has been designed to interface the virtual objects of each acquired environment with the modules of the game-logic developed with Unity. The immersive Virtual Reality is based on the use of the HTC Vive Pro head mounted display. Furthermore, the method permits to associate the patient-specific serious game to a set of software modules for the medical monitoring and the data management for the generation of reports useful for the evaluation. The solution has been evaluated by measuring the time needed to develop a whole VR platform for two different familiar environments. Less than 5 hours are required to complete the design process.

Force analysis of tubular fabric during drilling and sampling

2017 ◽  
Vol 88 (23) ◽  
pp. 2665-2681
Author(s):  
Zuowei Ding ◽  
Weidong Yu
Keyword(s):  
Product Design ◽  
Elastic Properties ◽  
Lunar Soil ◽  
Experimental Results ◽  
Future Research ◽  
Force Analysis ◽  
Interaction Forces ◽  
Correlation Relationship ◽  
Force Time ◽  
The Relationship

Based on the principles of kinetics, through analyzing interaction forces among tubular fabric, round pipe and lunar soil simulant during drilling and sampling, it was found that radial elastic properties of tubular fabric, cooperation between tubular fabric and round pipe all influenced the forces. Three different lengths of tubular fabrics were manufactured to verify the analysis. The results testified that the greater the length, the greater the forces at any corresponding time. The relationship between forces and time is linear. The positive correlation relationship in a folded state turned negative and, ultimately, to a fixed value. Compared to theoretical force–time curves, experimental results are bigger and more accurate. Experimental curves demonstrated a creeping phenomenon, which displayed a buckling wave during drilling and sampling. These results offer effective guidance to future research and product design.

scholarly journals Quantification of the Interaction Forces between Metals and Graphene by Quantum Chemical Calculations and Dynamic Force Measurements under Ambient Conditions

ACS Nano ◽  
2013 ◽  
Vol 7 (2) ◽  
pp. 1646-1651 ◽  
Author(s):  
Petr Lazar ◽  
Shuai Zhang ◽  
Klára Šafářová ◽  
Qiang Li ◽  
Jens Peter Froning ◽  
...  
Keyword(s):  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Dynamic Force ◽  
Force Measurements ◽  
Ambient Conditions ◽  
Interaction Forces

Atomic-Scale Friction Measurements Using Friction Force Microscopy: Part I—General Principles and New Measurement Techniques

1994 ◽  
Vol 116 (2) ◽  
pp. 378-388 ◽  
Author(s):  
Ju-Ai Ruan ◽  
Bharat Bhushan
Keyword(s):  
Friction Force ◽  
Microelectromechanical Systems ◽  
Atomic Scale ◽  
Magnetic Storage ◽  
Basic Operation ◽  
Friction Force Microscopy ◽  
Force Measurements ◽  
Friction Forces ◽  
Force Microscopy ◽  
Friction Measurements

Friction force measurements using modified atomic force microscopy, called here Friction Force Microscopy (FFM), are becoming increasingly important in the understanding of fundamental mechanisms of friction, wear, and lubrication, and to study interfacial phenomena in micro- and nanostructures used in magnetic storage systems and Microelectromechanical Systems (MEMS). FFMs can be used to study engineering surfaces in dry or wet conditions. A review of existing designs of FFMs and methods of friction force measurements is presented. In terms of friction force measurements, there are important issues related to the basic operation and calibration of these instruments which have not been fully studied. A new method of measuring friction fore using a commercial FFM and a calibration procedure for conversion of measured data to normal and friction forces are presented. Microscale friction data of selected materials are presented and discussed in light of macro-friction measurements.

Serious Games in Speech Therapy

2012 ◽  
pp. 422-445
Author(s):  
Tobolcea Iolanda ◽  
Danubianu Mirela
Keyword(s):  
Educational Policy ◽  
Educational System ◽  
Serious Games ◽  
Speech Therapy ◽  
Teaching Practice ◽  
Technological Development ◽  
Educational Needs ◽  
Computer Applications ◽  
Special Educational Needs ◽  
Teaching Methodologies

Technological development will shed new light upon teaching methodologies, and psychologists, pedagogical experts, and computer experts will have to closely collaborate in order to produce a ready-made tool to be used in the future teaching practice. The educational system intensively uses ICT devices and programs, as their use can change the perspective on the educational policy. In Romania, the psycho-pedagogical studies and experiments contributed to the improvement of the therapeutic progress of the persons with special educational needs. This chapter aims to analyze the way in which serious games can be used in education and see how they can become useful tools in speech therapy. The conclusion of this chapter is that, like many other computer applications, serious games can be tools that complement, often with remarkable results, the therapy.

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