Research on Matching Safety of Overwind Protection Device
Issue:
Volume 3, Issue 6, November 2018
Pages:
105-111
Received:
26 October 2018
Accepted:
4 December 2018
Published:
16 January 2019
DOI:
10.11648/j.ajmie.20180306.11
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Abstract: For a long time, in the process of mine hoisting system design, the installation position of overwind and overwind protection device is determined according to experience, which is widely disputed, indicating that the system safety has not reached the perfect state, and the traditional experience conclusion needs to be analyzed theoretically. It is necessary to study the parameter matching problem, analyze the impact of overwind protection devices on the system protection results at different installation positions, and improve the safety of the prompt system from a system perspective. The research about parameters matching of overwinding safety protection system of the shaft multi-rope hoisting system has been worked on in this essay by carrying out simulation analysis with numerical methods, involved with specific examples, in the perspective of the dynamics. According to the research, the braking force on the over wind side is significantly greater than that on the under wind side, there is the best matching relation between overwinding and underwinding braking force, making the braking stroke on the overwinding and underwinding side equal, or the overwinding is slightly larger than the underwinding stroke, which will be more beneficial to the safety of the system. The conclusion of this study is helpful to perfect the theory of overwind protection and improve the security of the system.
Abstract: For a long time, in the process of mine hoisting system design, the installation position of overwind and overwind protection device is determined according to experience, which is widely disputed, indicating that the system safety has not reached the perfect state, and the traditional experience conclusion needs to be analyzed theoretically. It is...
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Development of a Complex Examination Device for QST in Medical Institutions
Yoshifumi Oyama,
Masanobu Nagata,
Miki Ohgushi,
Mituka Hagino
Issue:
Volume 3, Issue 6, November 2018
Pages:
112-118
Received:
30 October 2018
Accepted:
22 November 2018
Published:
16 January 2019
DOI:
10.11648/j.ajmie.20180306.12
Downloads:
Views:
Abstract: In medical institutions, the manner in which quantitative sensory testing (QST) is conducted is an issue. A complex-type inspection device has been investigated and developed for use in testing for the senses of vibration and temperature. The stimulus probe for testing the sense of temperature is configured by a Peltier element. Using the prototype of the stimulus probe, the differences in how the stimulus was felt between patients suspected of having a sensory impairment and those who are healthy were tested. Upon comparing patients and healthy subjects, it was revealed that the proportion of patients who detected the stimulus correctly was lower than that of healthy subjects at each temperature. To generate the same stimulus as a tuning fork in order to examine the sense of vibration, a sense of vibration stimulus probe that combines an electromagnetic coil and an elastic material has been devised. As a result, the prototype device was able to generate a vibration force nearly equal to the tuning fork. We are currently working on adding a new function to the temperature stimulus probe so as to allow us to measure the temperature of the tested area of subjects.
Abstract: In medical institutions, the manner in which quantitative sensory testing (QST) is conducted is an issue. A complex-type inspection device has been investigated and developed for use in testing for the senses of vibration and temperature. The stimulus probe for testing the sense of temperature is configured by a Peltier element. Using the prototype...
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