Grip forces of the fingertips

Freund, Jouni; Toivonen, Risto; Takala, Esa-Pekka

doi:10.1016/s0268-0033(02)00043-8

Cited by 33 publications

(29 citation statements)

References 14 publications

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“…Studies reported in recent years also showed that the grip force shared among the fingertips is independent to the magnitude of the grip force and the diameter of the handle 119) ; wearing glove or using tool with handles wrapped with vibration absorption material can reduce the contact pressure 123) , triggering force, and muscular exertion 127) .…”

Section: Applied Forcesmentioning

confidence: 96%

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Recent Advances in Biodynamics of Human Hand-Arm System

Dong

Welcome

2005

INDUSTRIAL HEALTH

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The biodynamics of human hand-arm system is one of the most important foundations for the measurement, evaluation, and risk assessment of hand-transmitted vibration (HTV) exposure. This paper presents a new conceptual model relating factors influencing cause-effect relationships for HTV exposure, a new study strategy, and a comprehensive review of the recent advances in the biodynamics closely associated with HTV exposure. The review covers the following five aspects: theoretical modeling of biodynamic responses, vibration transmissibility, driving-point biodynamic responses, evaluation of anti-vibration gloves, and applied forces. This review finds that some significant advances in each of these aspects have been achieved in the recent years. Several important issues and problems in the biodynamic measurement have been identified and resolved, which has significantly helped improve the reliability and accuracy of the experimental data. The results reported in recent years suggest that, from the point of view of biodynamics, the frequency weighting specified in ISO 5349-1 (2001) overestimates the low frequency effect but underestimates the high frequency effect on the fingers and hand. The major problems, issues, and topics for further studies are also outlined in this paper. It is anticipated that the further studies of the biodynamics of the system will eventually lead to establishment of a robust vibration exposure theory. Although this review focuses on the biodynamics of the hand-arm system, the fundamental concepts and some methodologies reviewed in this paper may also be applicable for the study of whole-body vibration exposure.

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Section: Applied Forcesmentioning

confidence: 96%

“…A few new instrumented handles have been developed 13,[115][116][117][118][119][120] . They are suitable for laboratory studies.…”

Section: Applied Forcesmentioning

confidence: 99%

Recent Advances in Biodynamics of Human Hand-Arm System

Dong

Welcome

2005

INDUSTRIAL HEALTH

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“…There are six basic groups of variables including the variables of decision, input and state variables, exogenous and random variables, finally the output variables. In order to create a mathematical model equation by translate the gripping techniques; there are many factors that needed to be taken into account [19,20]. For an example the dimensional of the homogeneity requirement and information of quantitative, both of the following factors are closely related to influencing parameter for mathematical model factors.…”

Section: Methodologiesmentioning

confidence: 99%

“…For an example the dimensional of the homogeneity requirement and information of quantitative, both of the following factors are closely related to influencing parameter for mathematical model factors. Jouni et al [20] stated that the grip force of a typical finger -('i' = little ring, middle or index fingers). On the other hand Langhaar [21] stated that the single finger grip force ƒ=∑ , hand l and handle diameter D can be used in determine the normal problems based on the dimensional homogeneity with a valid equations of the physics.…”

Section: Methodologiesmentioning

confidence: 99%

“…To ensure perfection in the interpretation of the diameter of the holder in determining the minimal grip force, time and tool holder will plays an important role. Each analysis conducted on the model will provide the estimations of the total force exerted on the fingertip grip force as a function of number, diameters of the holder, and the size of the user's/human hand [1,2,20]. Finger segments in the process of non-uniform distribution of grasping is proportional to the ability of finger showing a strong correlation with subjective assessment [8,9,10,22].…”

Section: Literature Reviewmentioning

confidence: 99%

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Accurate Measurement of the Force Sensor for Intermediate and Proximal Phalanges of Index Finger

Adnan¹

2012

IJCA

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In this research paper, the study for grip force on the maximum level of the various materials handling griper can be evaluate at an effective maximum isometric strength especially for intermediate and proximal phalanges of index finger. This analysis method using the piezoresistive force sensor, whereas the devices will be automatically increases the accuracy and repeatability of the force sensitivity. Force sensor is a component of flexible and easily applied to enable measurement of the non-intrusive value. The sensor can be attached to or placed on a variety of surface conditions. The physical structure of product is to be combined with plastic film or metal for increased stiffness or for added protection from abrasion. In order to determine forces acting upon an articular joint during fingers rehabilitation for maximum grip force on low cost DataGlove. The estimation show that all the action force is starting at their fingertips functioning as the total volume of gripper force, dimensions / orientation of the handle, and grip made. By measuring the gripper forces acting on the fingertips of several subjects, the different handle and level of gripper force are resulting from movement of fingers will be gathered and will be analyzed so that a realistic mathematical model structure could be produced.

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