scholarly journals A Preliminary Study on Ergonomic Contribution to the Engineering Design Approach of a Wheel Loader Control Lever System

2021 ◽  
Vol 14 (1) ◽  
pp. 122
Author(s):  
Shaun Wei Jun Choong ◽  
Poh Kiat Ng ◽  
Boon Chin Yeo ◽  
Anca Draghici ◽  
Alin Gaureanu ◽  
...  
Keyword(s):  
Grip Force ◽  
Musculoskeletal Diseases ◽  
Force Measurement ◽  
Wheel Loader ◽  
Resistance Factors ◽  
Heavy Machinery ◽  
Lever System ◽  
Preliminary Study ◽  
Perceived Force ◽  
Control Lever

Studies show that heavy machinery operators are exposed to risk factors of musculoskeletal diseases. However, there has yet to be a study investigating the grip analysis of heavy machinery control levers. This preliminary study aims to investigate the grip analysis of a system that emulates the push–pull operations, handle shapes, and resistance of wheel loader control lever systems. The system was designed, analysed, and optimised using Autodesk Inventor 2019 before fabrication and testing. It underwent usability testing for estimated and perceived grip force analysis (ergonomics analysis). The tests measured estimated force using a sensor glove, and perceived force using the Borg CR10 scale. The data were analysed using regression and paired t-tests. The findings suggested that pulling and high resistance factors required higher estimated force (339.50 N) and perceived force (5.625) than pushing and low resistance factors in manoeuvring the system (p < 0.05). The cylindrical handle required more estimated force (339.50 N) but less perceived force (4.5) than the spherical handle due to ergonomic design considerations (p < 0.05). Although there were inaccuracies in force measurement methods, the perceived method was still effective for data collection, since it is challenging to measure grip force in a real situation with heavy machinery. While this study was only a simulation, it provided researchers with ideas that may solve problems in the manipulation of heavy machinery control levers.

scholarly journals Is the grip force measurement suitable for assessing overall strength regardless of age and gender?

Measurement ◽  
2021 ◽  
Vol 176 ◽  
pp. 109093
Author(s):  
Danuta Roman-Liu ◽  
Tomasz Tokarski ◽  
Joanna Mazur-Różycka
Keyword(s):  
Grip Force ◽  
Force Measurement ◽  
Age And Gender ◽  
And Gender

scholarly journals Evaluation of thin, flexible sensors for time-resolved grip force measurement

2007 ◽  
Vol 221 (12) ◽  
pp. 1687-1699 ◽  
Author(s):  
E R Komi ◽  
J R Roberts ◽  
S J Rothberg
Keyword(s):  
Shear Force ◽  
Grip Force ◽  
Force Measurement ◽  
Real Life ◽  
Force Sensor ◽  
Ease Of Use ◽  
Time Resolved ◽  
Flexible Sensors ◽  
Sensor Performance ◽  
Dynamic Accuracy

Three types of thin, flexible force sensor were studied under a variety of loading conditions to determine their suitability for measuring grip force. Static accuracy, hysteresis, repeatability, and drift errors were established, the effects of shear force and surface curvature were considered, and dynamic accuracy and drift were measured. Novel tests were developed to consider dynamic accuracy and sensitivity to shear loadings. Additionally, three sensors were evaluated in a real-life gripping scenario, measuring grip force during a golf shot. Comments are made on sensor performance, ease of use, and durability.

Characterizing the Human Wrist for Improved Haptic Interaction

2003 ◽  
Author(s):  
Katherine J. Kuchenbecker ◽  
June Gyu Park ◽  
Gu¨nter Niemeyer
Keyword(s):  
Grip Force ◽  
Force Measurement ◽  
Wrist Joint ◽  
Calibration Procedure ◽  
Order System ◽  
Response Characteristics ◽  
Haptic Displays ◽  
Positive Linear Correlation ◽  
Improved Performance ◽  
Sense Of Touch

Haptic displays provide the user with a sense of touch in both simulation of virtual environments and teleoperation of remote robots. The instantaneous impedance of the user’s hand affects this force interaction, changing the transients experienced during activities such as exploratory tapping. This research characterizes the behavior of the human wrist joint while holding a stylus in a three-fingered grasp. Nonparametric identification methods, evaluating frequency-and time-responses, support a second-order system model. Further analysis shows a positive linear correlation between grip force and wrist impedance for all subjects, though each individual’s trend is unique. These findings suggest that a quick calibration procedure and a realtime grip force measurement could enable a haptic display to predict user response characteristics throughout an interaction. Such knowledge would enable haptic control algorithms to adapt continuously to the user’s instantaneous state for improved performance.

scholarly journals Risk Factors that Determine Less Favourable Hospitalisation Course and Outcome in Patients with ESBL Producing Enterobacteriaceae Infection: Preliminary Results / Riska Faktori, Kas Nosaka Sliktāku Hospitalizācijas Gaitu Un Iznākumu Pacientiem Ar Esbl Producējošu Enterobacteriaceae Dzimtas Baktēriju Infekciju: Sākotnējie Rezultāti

2016 ◽  
Vol 70 (4) ◽  
pp. 252-255
Author(s):  
Vita Skuja ◽  
Katrīna Pekarska ◽  
Una Caune ◽  
Linda Piekuse ◽  
Inga Kempa ◽  
...  
Keyword(s):  
Internal Medicine ◽  
Risk Factors ◽  
Musculoskeletal Diseases ◽  
Genetic Data ◽  
Beta Lactamase ◽  
Antibacterial Resistance ◽  
Extended Spectrum Beta Lactamase ◽  
Study Results ◽  
Bacterial Plasmid ◽  
Preliminary Study

Abstract Hospitalisation course and outcome for patients with extended-spectrum beta-lactamase (ESBL) producing Enterobacteriaceae infection is less favourable due to extensive antibacterial resistance. This study was conducted to identify possible risk factors that could influence the hospitalisation course and outcome in these patients. The study protocol included demographic, clinical, hospitalisation, bacteriological and plasmid genetic data. The preliminary study results showed that hospitalisation course and outcome was less favourable for internal medicine profile patients with ESBL producing bacteria, TEM gene presence in the bacterial plasmid genome, patient age < 65 years and patients with infectious and musculoskeletal diseases. The study includes preliminary data only and further studies should be carried out to verify the suggested risk factors.

scholarly journals A preliminary study of an intelligent grip force collector and service system for the elderly

2019 ◽  
Vol 11 (2) ◽  
pp. 168781401982708
Author(s):  
Shijian Luo ◽  
Wenjie Li ◽  
Mingya Wei ◽  
Yichao Huang
Keyword(s):  
Grip Force ◽  
Service System ◽  
The Elderly ◽  
Preliminary Study

scholarly journals Preliminary study of traditional selection potato varieties resistance for potatoes ladybug Henosepilachna vigintioctopunctata Motch. (Fabricius, 1775) in the Primorsky territory

2019 ◽  
pp. 116-119
Author(s):  
N. V. Matsishina ◽  
A. S. Shaybekova ◽  
N. G. Boginskaya ◽  
O. A. Sobko ◽  
D. I. Volkov ◽  
...  
Keyword(s):  
Potato Breeding ◽  
Far East ◽  
Preliminary Assessment ◽  
Potato Varieties ◽  
Resistance Factors ◽  
Pest Damage ◽  
The Far East ◽  
Insect Populations ◽  
Preliminary Study ◽  
Selection For

Relevance. Potato ladybug is a polyphagous pest. Its distributed throughout the Far East, in India, Korea, Japan and the countries of South America. Most affected by it are potatoes, tomatoes, eggplant, zucchini, peppers, cucumbers, pumpkin, melon, beans. Leaving the veins intact pest eats the soft tissue of the leaf. Such leaves die quickly. Potato ladybug is a carrier of some diseases of potato and it also causes damage to plants. But insecticides pollute products and sustainable insect populations. The use of varieties with high resistance to pest damage eliminates the need for mass application of insecticides.Methods. The data on a preliminary assessment of potato varieties of domestic and foreign selection for resistance to a twenty-eight-point potato ladybug Henosepilachna vigintiomaculata Motch. (Fabricius, 1775) in the Primorye Territory. This work aim work was a preliminary assessment of the traditional potato breeding resistance factors to pest damage. The experiment out using generally accepted methods for the study and evaluation of potato varieties for pests with minor modifications was carried.Results. As a study result it was found that Belmonda, Labella, Red Lady, Queen Anna, Lilly, Sante varieties were the least suitable for passing the stages of ontogenesis and nutritional nutrition of the pest. The most tolerant to the pest – varieties Smak, Casachok, Yantar. The maximum mortality of potato ladybug larvae was observed in varieties Belmonda, Dachny, Augustin, Yubilyar, Labella, Sante, Koroleva Anna, Laperla in laboratory experiment. Minimum on varieties Smak, Casachok, Yantar, Red Lady. The data indicate the manifestation of an antibiotic barrier in potatoes, which must be confirmed by a field experiment. 

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