• Title/Summary/Keyword: Gripping

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The Effects of Electrical Therapy and Kinesio Taping on the Grip Strength and Pain in Tennis Elbow Patients (전기치료와 키네시오 테이핑 요법이 테니스 엘보 환자의 통증과 악력에 미치는 영향)

  • Lee, Kwang jae
    • Journal of Korean Physical Therapy Science
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    • v.21 no.1
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    • pp.53-58
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    • 2014
  • Background : The purpose of this study is to identify the level of positive influence on the pain and the gripping power in patients with tennis elbow by comparing the TENS treatment method and the kinesio taping therapy with good accessibility among the kinesio taping therapy and electrical therapy. Methods : Targeting the patients diagnosed with tennis elbow, the subjects were categorized in groups of four, each of electrical therapy group and kinesio tape therapy group where the degree of pain reduction through VAS before and after the treatment of each group and the measurement of the degree of gripping power increase using the gripping power measurement tool as well as the pain reduction changes and gripping power increase before and after the treatment between the two groups were compared. Result : As a result, the electrical therapy group and the kinesio tape group were able to obtain the results of pain reduction and gripping power increase through VAS before and after the treatment, but for all pain reduction and gripping power increase, it had no statistically significant changes(p>.05). In addition, in the changes of pain reduction and changes of gripping power increase before and after the treatment, there were no statistically significant differences between the electrical therapy group and the kinesio tape group(p>.05). Conclusion : Based on the results so far, it is thought that the kinesio taping therapy can positively influence the pain reduction of patients with tennis elbow and increase of gripping power.

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A Study on the FEM Analysis and Gripping Force Control of End-Effector for the Wafer Handling Robot System (Wafer 반송용 End-Effector의 FEM 해석 및 파지력 제어에 관한 연구)

  • 권오진;최성주;이우영;이강원;박원규
    • Journal of the Semiconductor & Display Technology
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    • v.2 no.3
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    • pp.31-36
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    • 2003
  • On this study, an E.E(End-Effector) for the 300 mm wafer transfer robot system is newly suggested. It is a mechanical type with $180^{\circ}$ rotating ranges and is composed of 3-point arms, two plate springs and single-axis DC motor controlled by microchip. To design, relationship between the gripping force and the wafer deformation is analyzed by FEM. By analytic results, the gripping force for 300 mm wafer is confirmed as 255~274 gf. From experimental results on gripping force, repeatable position accuracy and gripping cycle times in a wafer cleaning system, we confirmed that the suggested E.E was well designed to satisfiy on the required performance for 300 mm wafer transfer robot system.

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The Gripping Force Control of Robot Manipulator Using the Repeated Learning Function Techniques (반복 학습기능을 이용한 로봇 매니퓰레이터의 파지력제어)

  • Kim, Tea-Kwan;Baek, Seung-Hack;Kim, Tea-Soo
    • Journal of the Korean Society of Industry Convergence
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    • v.18 no.1
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    • pp.45-52
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    • 2015
  • In this paper, the repeated learning technique of neural network was used for gripping force control algorithm. The hybrid control system was introduced and the manipulator's finger reorganized form 2 ea to 3 ea for comfortable gripping. The data was obtained using the gripping force of repeated learning techniques. In the fucture, the adjustable gripping force will be obtained and improved the accuracy using the artificial intelligence techniques.

Development of Gripping Force Sensor for a Spindle Tool of BT50 (BT50용 스핀들 공구 파지력 검사를 위한 힘센서 개발)

  • Lee, Dae-Geon;Kim, Gab-Soon
    • Journal of Sensor Science and Technology
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    • v.30 no.1
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    • pp.42-46
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    • 2021
  • In this paper, we describe the development of a force sensor to measure the tool gripping force of the BT50 spindle. The force sensor for a BT50 must be installed inside the gripping force tester; hence, it must be of an appropriate size and have a rated capacity suitable for measuring the gripping force. So, the structure of the force sensor for BT50 was modeled, the size of the sensing part was determined by structural analysis, and the force sensor was manufactured by attaching a strain gauge. The characteristic test results of the manufactured force sensor, indicated that the nonlinearity error, hysteresis error, and reproducibility errors were each within 0.91%, Therefore it was determined that the manufactured force sensor can be used for checking the spindle tool gripping force.

Stduy on the Dynamic Gripping Force of a 3-Jaw Chuck (3-죠오 척의 동적 파악력에 관한 연구)

  • Park, Tae-Won;M. Tsutsumi;I. Tokasiki
    • Journal of the Korean Society for Precision Engineering
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    • v.8 no.4
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    • pp.126-136
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    • 1991
  • In order to reduce the possibilities of personnel injuries and damages to machines and to obtaim higher efficiency and machining accuracy in the manufacturing system, the chucking technology has recentry become important. The chucking technology of work greatly affects both the grometrical accuracy and fonctional performance of the workpiece. In this study, the dynamic gripping force of a 3-jaw power chuck is investigated on the factors of the shape of jaw and the shape of workpiece. From this investigation, the following observations are obtained. 1) The higher stiffness of workpiece is, the higher decrease of dynamic gripping force is. 2) The nearer to the root of jaw is, the higher decrease of dynamic gripping force is. 3) The centrifugal force of affectting the decrease of dynamic gripping force has to be considered in the centrifugal force of affecting jaw.

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Constitutive law for wedge-tendon gripping interface in anchorage device - numerical modeling and parameters identification

  • Marceau, D.;Fafard, M.;Bastien, J.
    • Structural Engineering and Mechanics
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    • v.15 no.6
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    • pp.609-628
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    • 2003
  • Mechanical anchorage devices are generally tested in the laboratory and may be analyzed using the finite element method. These devices are composed of many components interacting through diverse contact interfaces. Generally, a Coulomb friction law is sufficient to take into account friction between smooth surfaces. However, in the case of mechanical anchorages, a gripping system, named herein the wedge-tendon system, is used to anchor the prestressing tendon. The wedge inner surface is made of a series of triangular notches designed to grip the tendon. In this particular case, the Coulomb law is not adapted to simulate the contact interface. The present paper deals with a new constitutive contact/gripping law to simulate the gripping effect. A parameter identification procedure, based on experimental results as well as on a finite element/neural network approach, is presented. It is demonstrated that all parameters have been selected in a satisfactory way and that the proposed constitutive law is well adapted to simulate the wedge gripping effect taking place in a mechanical anchorage device.

Adaptive Gripper Mimicking Large Deforming Proleg of Hydraulic Skeleton Caterpillar (유체골격 애벌레의 다리조직 대변형을 모사한 적응형 그리퍼)

  • Jung, Gwang-Pil;Koh, Je-Sung;Cho, Kyu-Jin
    • Journal of the Korean Society for Precision Engineering
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    • v.29 no.1
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    • pp.25-32
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    • 2012
  • In this study, we present a gripping mechanism that is inspired by caterpillar's proleg. A caterpillar's proleg has planta that gives compliance to the proleg by greatly deforming its shape. In the bio-inspired gripper, the planta is implemented by flexure joints. The flexures buckle when end force and end moment is applied on the joint in opposite direction. Using this characteristic, the gripping structure is designed so that the flexure buckling can occur. Flexure buckling increases the region where gripping force is constant and this region leads to increasing in gripping range. At the same time, flexure buckling decouples all spines and therefore all spines can move differentially and independently. With this simple but effective mechanism, the bioinspire gripper can achieve adaptive gripping on rough and rugged surfaces. A prototype is built to demonstrate adaptive gripping on rough and rugged surfaces such as cement block, brick.

Development of a Transplanting Robot System for Tissue Culture Pants (II) - Machine Vision System - (조직배양체 이식로봇 시스템의 개발 (II) - 기계시각 시스템 -)

  • Lee, H. D.;Kim, K. D.;Kim, C. S.;Kim, J. P.;Jung, H.
    • Journal of Biosystems Engineering
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    • v.24 no.1
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    • pp.41-50
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    • 1999
  • This study aims at detecting the three dimensional gripping points for the transplanting robot system to grip in the process of developing transplanting robot system, which is one of the automation systems for transplanting tissue culture. The stereo vision system equipped with two cameras has been used to detect the gripping points of the plant stem. The method for matching the plants of the image information which came from two cameras was to measure the total numbers of pixels, leaves, and the heights of the plants. The gripping points were detected near the roots after extracting the stem parts by the standard deviation of the X axis according to the Y axis. The performance test of the developed program showed that the detecting errors of the gripping points were 0∼1mm for X axis and 1∼2mm for Y & Z axis. The mean running time of the program was about 3 seconds.

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Development of a Bottle Gripping System for Corrosion Operation (부식공정을 위한 유리병 장입시스템 개발)

  • Park Gang;Han Yeong-Geun;Gang Gyeong-Sik
    • Proceedings of the Safety Management and Science Conference
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    • 2005.05a
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    • pp.443-452
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    • 2005
  • In order to enhance the quality of the glass bottle and to preserve the contents long, corrosion of the bottle surface is often required. The corrosion operation consists of dangerous and harmful tasks using strong acid such as HF. Thus, the corrosion operation should be automatized to improve the worker's safety. The first step of the automation is to develop the bottle gripping system that automatically grips and fixes the bottle during corrosion operations. The gripping system consists of holders, holder plates, air cylinders, and bottle aligning system. This paper shows the gripping system development procedure.

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