The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Eiji Kobayashi - One of the best experts on this subject based on the ideXlab platform.
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Verification of a developed Testing Machine for suture threads through measurement of tension and elongation
2016 IEEE 14th International Workshop on Advanced Motion Control (AMC), 2016Co-Authors: Kouhei Ohnishi, Eiji KobayashiAbstract:In this paper, the effect of sterilization on a thin suture thread is evaluated, and verification of a developed Testing Machine is conducted. The suture threads for microsurgery is thin and easy to rupture. That will lead a medical accident, so that the evaluation of the thread's performance is important. One of the factors which decides the performance of the thread is sterilization. The thread must be sterilized for being utilized in a medical operation, and generally it deteriorates the performance of the thread. Tension and elongation of sterilized threads and non-sterilized threads are measured, and the difference among them is discussed. The measurement of the threads is conducted by using a developed Testing Machine. Reaction force observer (RFOB) is implemented in the Machine to measure tension and elongation of the thread at the same time. Also, tension control is implemented to pull the thread from both sides that is similar to the operation which surgeons do. The validity of the Testing Machine is confirmed through the measurement.
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Development of a thread Testing Machine and evaluation of a suture thread with a knot
2016 IEEE International Conference on Industrial Technology (ICIT), 2016Co-Authors: Hayata Sakai, Kouhei Ohnishi, Eiji KobayashiAbstract:In this paper, a Testing Machine for a fine suture thread is developed, and a relation between tension and elongation of the thread with a knot is measured. A fine suture thread is used in microsurgery, and that makes the operation difficult because the thread is fragile. Therefore, an evaluation of the thread is required by surgeons. Conventionally, the thread is evaluated by weight, so that elongation of the thread cannot be measured. This paper develops a Testing Machine for the fine suture thread using a reaction force observer (RFOB) which calculates force from input of a motor and information of a position sensor, and it enables the Machine to measure tension and elongation of the thread at the same time. The Testing Machine also use tension control which enables the Machine to pull the thread from both sides. An experiment was conducted by using the Machine. Results showed the tensile strength of a knotted thread was weaker than an unknotted thread and the elongation at rupture of a knotted thread was shorter than that of an unknotted thread. Moreover, the tensile strength and the elongation at rupture did not depend on the number of throws. The Machine was verified that it can detect the difference among them.
Kouhei Ohnishi - One of the best experts on this subject based on the ideXlab platform.
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Verification of a developed Testing Machine for suture threads through measurement of tension and elongation
2016 IEEE 14th International Workshop on Advanced Motion Control (AMC), 2016Co-Authors: Kouhei Ohnishi, Eiji KobayashiAbstract:In this paper, the effect of sterilization on a thin suture thread is evaluated, and verification of a developed Testing Machine is conducted. The suture threads for microsurgery is thin and easy to rupture. That will lead a medical accident, so that the evaluation of the thread's performance is important. One of the factors which decides the performance of the thread is sterilization. The thread must be sterilized for being utilized in a medical operation, and generally it deteriorates the performance of the thread. Tension and elongation of sterilized threads and non-sterilized threads are measured, and the difference among them is discussed. The measurement of the threads is conducted by using a developed Testing Machine. Reaction force observer (RFOB) is implemented in the Machine to measure tension and elongation of the thread at the same time. Also, tension control is implemented to pull the thread from both sides that is similar to the operation which surgeons do. The validity of the Testing Machine is confirmed through the measurement.
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Development of a thread Testing Machine and evaluation of a suture thread with a knot
2016 IEEE International Conference on Industrial Technology (ICIT), 2016Co-Authors: Hayata Sakai, Kouhei Ohnishi, Eiji KobayashiAbstract:In this paper, a Testing Machine for a fine suture thread is developed, and a relation between tension and elongation of the thread with a knot is measured. A fine suture thread is used in microsurgery, and that makes the operation difficult because the thread is fragile. Therefore, an evaluation of the thread is required by surgeons. Conventionally, the thread is evaluated by weight, so that elongation of the thread cannot be measured. This paper develops a Testing Machine for the fine suture thread using a reaction force observer (RFOB) which calculates force from input of a motor and information of a position sensor, and it enables the Machine to measure tension and elongation of the thread at the same time. The Testing Machine also use tension control which enables the Machine to pull the thread from both sides. An experiment was conducted by using the Machine. Results showed the tensile strength of a knotted thread was weaker than an unknotted thread and the elongation at rupture of a knotted thread was shorter than that of an unknotted thread. Moreover, the tensile strength and the elongation at rupture did not depend on the number of throws. The Machine was verified that it can detect the difference among them.
Wen Jingjing - One of the best experts on this subject based on the ideXlab platform.
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The optimized algorithm for working parameters of the vertical impact Testing Machine
2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI), 2017Co-Authors: Liu Chengwu, Wen JingjingAbstract:In order to improve the precision of working parameters of vertical impact Testing Machine, the algorithm for calculating parameters of this equipment is optimized based on Lab Windows/CVI. At the background of principle and application of vertical impact Testing Machine, the principle of this equipment is simulated by two-degree of freedom model, it's different from unidirectional model and the differential equations are solved by four-order-Runge-Kutta method. Ideal parameters of this equipment are computed repeatedly by method of bisection, it's verified by experiment finally. Compared with traditional algorithm and experimental data, the maximum precision of the optimized parameters are increased by 39.3%. The load of foundation is evaluated by this optimized algorithm, it has much engineered value.
Hayata Sakai - One of the best experts on this subject based on the ideXlab platform.
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Development of a thread Testing Machine and evaluation of a suture thread with a knot
2016 IEEE International Conference on Industrial Technology (ICIT), 2016Co-Authors: Hayata Sakai, Kouhei Ohnishi, Eiji KobayashiAbstract:In this paper, a Testing Machine for a fine suture thread is developed, and a relation between tension and elongation of the thread with a knot is measured. A fine suture thread is used in microsurgery, and that makes the operation difficult because the thread is fragile. Therefore, an evaluation of the thread is required by surgeons. Conventionally, the thread is evaluated by weight, so that elongation of the thread cannot be measured. This paper develops a Testing Machine for the fine suture thread using a reaction force observer (RFOB) which calculates force from input of a motor and information of a position sensor, and it enables the Machine to measure tension and elongation of the thread at the same time. The Testing Machine also use tension control which enables the Machine to pull the thread from both sides. An experiment was conducted by using the Machine. Results showed the tensile strength of a knotted thread was weaker than an unknotted thread and the elongation at rupture of a knotted thread was shorter than that of an unknotted thread. Moreover, the tensile strength and the elongation at rupture did not depend on the number of throws. The Machine was verified that it can detect the difference among them.
Željko Alar - One of the best experts on this subject based on the ideXlab platform.
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Influence of Force Transducer Position on Results of Testing Machine Calibration
Transactions of Famena, 2020Co-Authors: Danko Ćorić, Tamara Aleksandrov Fabijanić, Željko AlarAbstract:In calibrating a Testing Machine it is important to correctly position a standard force transducer which is used for calibration. Inclining of the force transducer results in multiaxial load and bending effects which adversely affect the measurement accuracy, and thus the classification of the tested measuring range of the Testing Machine. Already small inclinations of up to 3 , due to the occurrence of radial force component, lead to a deviation of the measured values of relative errors in the Testing Machine measuring system. Inclinations of 4 and 5 are especially adverse, when the Testing Machine errors worsen significantly, especially the error of accuracy, and to a lesser extent also the errors of repeatability and reversibility.
