Wool metrology research and development to date

Cottle, DJ; Baxter, Peter

doi:10.1080/00405167.2015.1108543

Cited by 26 publications

(14 citation statements)

References 173 publications

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“…Cottle and Baxter (2015) show CL from 0.21 to 0.85, from 0.25 to 0.82 and from 0.33 to 092 µm for Laserscan, OFDA and Airflow, respectively. Likewise, the increase of SD, standard error, and CI is according to the findings of other researchers.…”

Section: Discussionmentioning

confidence: 99%

“…For coarser fibres, accuracy declines to 1.317 µm, although this value is within the range accepted by the International Wool Textile Organization. Accuracy could be improved with good calibration using regression models (Cottle & Baxter, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Unfortunately, there are no reports of comparisons of equipment using fibres of alpacas or llamas. Cottle & Baxter (2015) give 95% confidence limits (CLs), a statistic that evaluates the precision of various mean fibre diameter (MFD) measurement methods for raw wool, taken from the appropriate IWTO test methods. They showed CLs of ±0.33, ±0.21, and ±0.25 for samples with 15 µm for Air Flow, Laserscan and OFDA, respectively.…”

mentioning

confidence: 99%

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Development and preliminary validation of an automatic digital analysis system for animal fibre analysis

Quispe¹,

Benavidez²,

Sauri³

et al. 2017

SA J. An. Sci.

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New equipment was designed and developed to evaluate the physical characteristics of animal fibres, based on an automatic digital analysis system (ADAS) that allows the capture of a series of real-time images. In the development of the mechanical component, a design tool was used that allows visualization, simulation, and documentation of the product. At the same time, an Atmel (ATmega328) microcontroller was programmed to enable displacement of table coordinates, focus of images, and reading of the temperature and humidity of fibre samples and the environment. The fibre images were processed using artificial vision technology. Algorithms were also developed for edge detection to define the diameter of the fibre in pixels. Finally, calibration was carried out using a regression and standardized samples of wool tops. The authors then weighted the pixels to µm with a standard sample. A friendly graphical interface was developed for management of the built equipment, visualization of results, calibration, data and graphic export, configuration, among others. For validation, average fibre diameter (AFD), standard deviation (SD), coefficient of variation and comfort factor (CF) were compared with values of top wool patterns. Finally, the measurements of OFDA 2000 and FIBER-EC were compared using student t-test and Pearson correlation. The results of the validation showed that the confidence limit of FIBER-EC, which varied between 0.075 and 3.47 µm, is similar to that of the confidence limit of Sirolan Laserscan and OFDA 2000. Accuracy is better than the OFDA 2000 for fibre assessments less than 25 µm, which vary between 0.034 and 0.250 µm.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Development and preliminary validation of an automatic digital analysis system for animal fibre analysis

Quispe¹,

Benavidez²,

Sauri³

et al. 2017

SA J. An. Sci.

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show abstract

“…These physical properties directly affect the speed of processing, processing yield, quantity of waste products, yarn quality, dyeing performance, visual attributes, handle attributes, fabric properties, cost of product, and appeal to customer. Cottle and Baxter (2015) reviewed the testing requirements for important physical properties of wool.…”

Section: Introduction To Wool Production and Demandmentioning

confidence: 99%

The science behind the wool industry. The importance and value of wool production from sheep

Doyle

Preston

McGregor³

et al. 2021

Animal Frontiers

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“…Therefore, it is important to measure fiber diameter of wool samples with a high accuracy, precision and quickness [5]. Currently, there are a few instruments in use to measure fiber diameter of either greasy or clean wool samples at wool center laboratory and warehouse [6]; however, those were lack of portability, price affordability, measurable limitation, and inflexibility for field use on farms. Although OFDA, FIBER EC and Laserscan are main instruments currently used in industry but they are not portable and are very expensive [7].…”

mentioning

confidence: 99%

Interlaboratory Test Performance of a Portable Fiber Tester

Quispe¹,

Rubio²,

Sacchero³

et al. 2019

J Text Eng

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The objective of this research was to construct and to evaluate a portable fiber tester (PFT) for in field fleece and fiber test use. The standard wool top (SWT) samples were used for comparative measurement of fiber diameter using PFT in three laboratories without restricted ambient temperature or relative humidity control. Linear model with three factors was used to derive the least square means and variance components were determined. The PFT is constructed to be a compact and lightweight device of high-speed fiber testing. It works using digital image technology that measure and evaluate the fiber diameter variability of each wool sample within 45 seconds. The results show that the average fiber diameters measured by PFT at three labs are within IWTO defined tolerance values. There were no significant lab effect whereas, variance of labs remained as low. It can be concluded that PFT is a new instrument with high precision and accuracy to measure the fiber diameter of wool fleeces, which may be operated in differing field conditions.

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Wool metrology research and development to date

Cited by 26 publications

References 173 publications

Development and preliminary validation of an automatic digital analysis system for animal fibre analysis

Development and preliminary validation of an automatic digital analysis system for animal fibre analysis

The science behind the wool industry. The importance and value of wool production from sheep

Interlaboratory Test Performance of a Portable Fiber Tester

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