Design and Implementation of Yarn Tension Measurement System during Weft Insertion on Air-Jet Loom

Yarn tension during weft insertion is one of important factors which affect fabric properties. In air jet loom, many components have an influence on yarn tension, such as clamp, main nozzle, sub nozzle, brake, and the drum. In this paper, a measurement system for yarn tension experiment which based on a 32-bit Cortex-M3 embedded processor was designed and implemented. The system can control components at fixed time interval which is set by a supervisory computer, acquire yarn tension converted by a contacted electromagnetic induction tension sensor, and then transmit tension data to software system by Ethernet module. An experiment is conducted for research character of yarn tension driven by air flow. The experiment results indicate that the nozzle pressure and yarn diameter play an important role in yarn tension during weft insertion on air-jet loom. Besides, the delay of magnetic value is also considered under different nozzle pressure.

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Influence of Controlled Weft Yarn Tension of a Single Nozzle Air-Jet Loom on the Physical Properties of the Fabric

Textile Research Journal ◽

10.1177/0040517506065604 ◽

2006 ◽

Vol 76 (8) ◽

pp. 637-645 ◽

Cited By ~ 8

Author(s):

Hooshang Nosraty ◽

Ali A. A. Jeddi ◽

Mansour Kabganian ◽

Firouz Bakhtiari nejad

Keyword(s):

Physical Properties ◽

Weft Yarn ◽

Yarn Tension ◽

Air Jet ◽

Air Jet Loom

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Utilization of remote sensing for estimation of scale of cutting and growing of forest zones

Geodesy and Cartography ◽

10.22389/0016-7126-2017-920-2-57-60 ◽

2017 ◽

Vol 920 (2) ◽

pp. 57-60

Author(s):

F.E. Guliyeva

Keyword(s):

Remote Sensing ◽

Fixed Time ◽

Time Interval ◽

Time Points ◽

Average Value ◽

Time Period ◽

Remote Estimation ◽

The Given ◽

Forest Cutting

The study of results of relevant works on remote sensing of forests has shown that the known methods of remote estimation of forest cuts and growth don’t allow to calculate the objective average value of forests cut volume during the fixed time period. The existing mathematical estimates are not monotonous and make it possible to estimate primitively the scale of cutting by computing the ratio of data in two fixed time points. In the article the extreme properties of the considered estimates for deforestation and reforestation models are researched. The extreme features of integrated averaged values of given estimates upon limitations applied on variables, characterizing the deforestation and reforestation processes are studied. The integrated parameter, making it possible to calculate the averaged value of estimates of forest cutting, computed for all fixed time period with a fixed step is suggested. It is shown mathematically that the given estimate has a monotonous feature in regard of value of given time interval and make it possible to evaluate objectively the scales of forest cutting.

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Bi-objective optimization research on integrated fixed time interval preventive maintenance and production for scheduling flexible job-shop problem

Expert Systems with Applications ◽

10.1016/j.eswa.2010.12.043 ◽

2011 ◽

Vol 38 (6) ◽

pp. 7169-7178 ◽

Cited By ~ 86

Author(s):

E. Moradi ◽

S.M.T. Fatemi Ghomi ◽

M. Zandieh

Keyword(s):

Preventive Maintenance ◽

Job Shop ◽

Fixed Time ◽

Time Interval ◽

Flexible Job Shop ◽

Fixed Time Interval ◽

Flexible Job Shop Problem

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Research on the response characteristics of solenoid valve of the air-jet loom by simulation

Journal of Thermal Science ◽

10.1007/s11630-013-0669-z ◽

2013 ◽

Vol 22 (6) ◽

pp. 606-612 ◽

Cited By ~ 4

Author(s):

Yuzhen Jin ◽

Ruoyu Deng ◽

Yingzi Jin ◽

Xudong Hu

Keyword(s):

Solenoid Valve ◽

Response Characteristics ◽

Air Jet ◽

Air Jet Loom

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A novel optimal sensitivity design scheme for yarn tension sensor using surface acoustic wave device

Ultrasonics ◽

10.1016/j.ultras.2014.03.004 ◽

2014 ◽

Vol 54 (6) ◽

pp. 1649-1655 ◽

Cited By ~ 2

Author(s):

Bingbing Lei ◽

Wenke Lu ◽

Changchun Zhu ◽

Qinghong Liu ◽

Haoxin Zhang

Keyword(s):

Acoustic Wave ◽

Surface Acoustic Wave ◽

Yarn Tension ◽

Design Scheme ◽

Surface Acoustic Wave Device ◽

Tension Sensor ◽

Acoustic Wave Device ◽

Wave Device

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Bayesian Nonparametric Estimation of Failure Rates with Censored Data

Calcutta Statistical Association Bulletin ◽

10.1177/0008068319830106 ◽

1983 ◽

Vol 32 (1-2) ◽

pp. 79-90 ◽

Cited By ~ 2

Author(s):

J. S. Rao ◽

R. C. Tiwari

Keyword(s):

Failure Time ◽

Dirichlet Distribution ◽

Survival Function ◽

Fixed Time ◽

Bayes Estimation ◽

Time Interval ◽

Failure Rates ◽

Failure Time Distribution ◽

Accelerated Life ◽

Bayesian Nonparametric Estimation

The failure time distribution is estimated in the nonparametric context when some of tbe observations arc censored. The time interval is partitioned into fixed class intervals, and number of failures and number censored in each of these intervals are observed. Using a Dirichlet distribution as the prior, the resulting estimates of the survival function and the failure rate have a nice and simple form. If instead of the fixed time intervals, one uses the “natural” intervals formed by the observed failure times, this gives essentially the same results as in Ferauson IUld Phadia (1977), Susarla and Van Ryzin (1976), but in a much simpler way. Bayes estimation under the increasins and decreasing failure rates is also considered, and applications to accelerated life testing are discussed.

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An application of the Precision Time synchronization Protocol in a time-interval measurement system

29th Conference on Precision Electromagnetic Measurements (CPEM 2014) ◽

10.1109/cpem.2014.6898305 ◽

2014 ◽

Author(s):

Te-Kwei Wang ◽

Shinn-Yan Lin

Keyword(s):

Measurement System ◽

Time Synchronization ◽

Time Interval ◽

Interval Measurement ◽

Precision Time ◽

Time Interval Measurement ◽

Synchronization Protocol

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Air Stream ejected from Sub-nozzles of Air Jet Loom

Journal of the Textile Machinery Society of Japan ◽

10.4188/jte1955.42.80 ◽

1996 ◽

Vol 42 (3-4) ◽

pp. 80-85 ◽

Cited By ~ 1

Author(s):

Ryuji Shintani ◽

Ikuei Donjou ◽

Kazuhide Chikaoka ◽

Atsushi Okajima

Keyword(s):

Air Jet ◽

Air Stream ◽

Air Jet Loom

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Improved bounds for the availability and unavailability in a fixed time interval for systems of maintained, interdependent components

Advances in Applied Probability ◽

10.1017/s0001867800033462 ◽

1980 ◽

Vol 12 (01) ◽

pp. 200-221 ◽

Cited By ~ 9

Author(s):

B. Natvig

Keyword(s):

Lower Bound ◽

System Reliability ◽

Nuclear Reactors ◽

Random Variables ◽

Fixed Time ◽

Time Interval ◽

Coherent System ◽

Exact Results ◽

Fixed Time Interval ◽

Special Case

In this paper we arrive at a series of bounds for the availability and unavailability in the time interval I = [t A , t B ] ⊂ [0, ∞), for a coherent system of maintained, interdependent components. These generalize the minimal cut lower bound for the availability in [0, t] given in Esary and Proschan (1970) and also most bounds for the reliability at time t given in Bodin (1970) and Barlow and Proschan (1975). In the latter special case also some new improved bounds are given. The bounds arrived at are of great interest when trying to predict the performance process of the system. In particular, Lewis et al. (1978) have revealed the great need for adequate tools to treat the dependence between the random variables of interest when considering the safety of nuclear reactors. Satyanarayana and Prabhakar (1978) give a rapid algorithm for computing exact system reliability at time t. This can also be used in cases where some simpler assumptions on the dependence between the components are made. It seems, however, impossible to extend their approach to obtain exact results for the cases treated in the present paper.

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