HVI Measurement Principles_By_AbuBakkar Marwat

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HVI High Volume TestingHVI High Volume TestingHVI High Volume TestingHVI High Volume Testing

HVI Measurement Principles:

Overview of each measurement Factors influencing test results

calibration accuracy and precision

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USTERUSTER®® HVIHVIUSTERUSTER®® HVIHVI

• Test Report

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Basic Measurements of cotton (bales): Length, Uniformity Strength Color Trash

NEW on HVI SPECTRUM: Maturity Short Fiber Index

USTERUSTER®® HVIHVIUSTERUSTER®® HVIHVI

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Pulling a Length StaplePulling a Length Staple

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Example:Example:

1 inch = staple class 32 32:32 = 1

1 1/16 inch = staple class 34 34:32 = 1 1/16

1 1/2 inch = staple class 48 48:32 = 1 1/2

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Relationship Between Classer’s Call Relationship Between Classer’s Call and HVI Length Resultsand HVI Length Results

Inches UHM [inches] UHM [mm] Code

unter 13/16 < 0.79 < 20.1 2413/16 0.80 - 0.85 20.1 - 21.6 267/8 0.86 - 0.89 21.8 - 22.6 2829/32 0.90 - 0.92 22.9 - 23.4 2915/16 0.93 - 0.95 23.6 - 24.1 30

31/32 0.96 - 0.98 24.4 - 24.9 311 0.99 - 1.01 25.1 - 25.8 321 1/32 1.02 - 1.04 25.9 - 26.4 331 1/16 1.05 - 1.07 26.7 - 27.2 341 3/32 1.08 - 1.10 27.4 - 27.9 35

1 1/8 1.11 - 1.13 28.2 - 28.7 361 5/32 1.14 - 1.17 29.0 - 29.7 371 3/16 1.18 - 1.20 30.0 - 30.5 381 7/32 1.21 - 1.23 30.7 - 31.2 391 1/4 1.24 - 1.26 31.5 - 32.0 40

1 9/32 1.27 - 1.29 32.3 - 32.8 411 5/16 1.30 - 1.32 33.0 - 33.5 421 11/32 1.33 - 1.35 33.8 - 34.3 431 3/8 > 1.38 > 35.0 44

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Fiber BeardComb

HomePosition

Breaker Jaws

Breaker Jaws

LED

D2 = Lens to BreakD1 = Length Standard

HVI Length & StrengthHVI Length & Strength

Measurement PrincipleMeasurement Principle

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Span Length -Span Length -Principle of MeasurementPrinciple of Measurement

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Mean Length - Mean Length - Principle of MeasurementPrinciple of Measurement

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Upper Half Mean Length -Upper Half Mean Length -Principle of MeasurementPrinciple of Measurement

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Comparison of Span and Mean LengthsComparison of Span and Mean Lengths

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Uniformity Ratio and Uniformity IndexUniformity Ratio and Uniformity Index

Uniformity Ratio UR = 50% SL x 100

2.5% SL

Uniformity Index UI = ML x 100

UHML

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Uniformity - EvaluationUniformity - Evaluation

Description Uniformity Ratio50%SL / 2.5%SL

Uniformity IndexML / UHML

very low 41 & lower 77 & lowerlow 41 - 43 77 - 79

average 44 - 46 80 - 82high 47 - 48 83 - 85

very high 48 & higher 85 & higher

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USTER® HVI SPECTRUMUSTER® HVI SPECTRUM

Features & Benefits:

Accurate and precise Short Fiber Index -

Detects high short fiber content bales quickly and

accurately

Proven algorithm under evaluation by USDA

High correlation to AFIS Short Fiber Content

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Staple Standards Staple Standards Evaluation CottonsEvaluation Cottons Test - r = 0.98 Test - r = 0.98

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8

10

12

14

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31 32 32 34 35 36 37 38

Sh

ort

Fib

er C

on

ten

t/ I

nd

ex [

%]

AFIS HVI

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Cotton Fiber StructureCotton Fiber Structure

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Bundle Fiber Strength - Bundle Fiber Strength - Principle of MeasurementPrinciple of Measurement

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* Calibrated to HVI Cal. Cottons

Bundle Fiber Strength - EvaluationBundle Fiber Strength - Evaluation

Description Pressley 0" MPSI(1000) lbs/in^2

Pressley 1/8"g/tex

Stelometer 1/8"g/tex

HVI 1/8"*g/tex

very low 70 – 78 21 & lower 17 & lower 21 & lowerlow 77 – 83 21 – 23 17 – 19 22 - 24average 84 – 90 24 – 26 20 – 22 25 – 27high 91 – 97 27 – 29 23 – 25 28 – 30very high 98 – 104 30 & higher 26 & higher 31 & higher

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MicronaireMicronaire


1. Closing Valve

2. Pressure Regulating Valve

3. Air Measuring Device

4. Pressure Change Measuring Device

5. Measuring Chamber with Fibers

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Relationship Between Maturity and Relationship Between Maturity and MicronaireMicronaire

Fine and immature, very low Micronaire

Fine and mature, low Micronaire

Coarse and immature, low Micronaire

Coarse and mature, high Micronaire

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Micronaire - EvaluationMicronaire - Evaluationsmaller than 3.0

= very fine small perimeter and mature or medium

perimeter and immature

3.1 to 3.6 = fine small to medium perimeter with different

degrees of maturity

3.7 to 4.7 = average medium perimeter with different degrees

of maturity

4.8 to 5.9 = coarse medium perimeter and mature or

large perimeter and immature

greater than 6.0

= very coarse large perimeter with different degrees

of maturity

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Low

Micronaire &

“fairly mature”

High

Micronaire &

“well mature”

Medium

Micronaire &

“fairly mature”

Medium

Micronaire &

“less mature”

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Features & Benefits:

Accurate and precise Maturity Index -

Detects potential immature bales quickly and

accurately

Advanced algorithm compares well to AFIS

Maturity Ratio

No special sample preparation necessary

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0.6

0.8

1

1.2

1 6 11 16 21 26 31 36 41 46 51 56 61 66 71

Mat

uri

ty R

atio

AFIS HVI

International Cotton Samples - r = 0.93International Cotton Samples - r = 0.93

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HVI Color & TrashHVI Color & Trash


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Color Range of Cotton Color Range of Cotton

• Two-dimensional color range

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HVI ColorHVI Color

• U.S. Upland color chart

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HVI ColorHVI Color

• 80-85% of U.S. cotton crop falls within this color range

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HVI ColorHVI Color

• Typical color distribution of U.S. cotton crop

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HVI ColorHVI Color

• Color chart for American Pima cottons

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U.S. Upland U.S. Upland Cotton Cotton StandardsStandards

Color Grade Symbols Code Leaf CodeWhiteGood MiddlingStrict MiddlingMiddlingStrict Low MiddlingLow MiddlingStrict Good OrdinaryGood Ordinary

GMSMMidSLMLMSGOGO

11213141516171

1234567

Light SpottedGood MiddlingStrict MiddlingMiddlingStrict Low MiddlingLow MiddlingStrict Good Ordinary

GM Lt SpSM Lt SpMid Lt SpSLM Lt SpLM Lt SpSGO Lt Sp

122232425262

123456

SpottedGood MiddlingStrict MiddlingMiddlingStrict Low MiddlingLow MiddlingStrict Good Ordinary

GM SpSM SpMid SpSLM SpLM SpSGO Sp

132333435363

123456

TingedStrict MiddlingMiddlingStrict Low MiddlingLow Middling

SM TgMid TgSLM TgLM Tg

24344454

2345

Yellow StainedStrict MiddlingMiddling

SM YSMid YS

2535

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• Grade descriptions

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Trash - Trash - Measurement PrincipleMeasurement Principle

Video Image

Analysis

Results:

% Area (covered)

(Particle)Count

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Relationship of Trash Measurement to Relationship of Trash Measurement to Classer’s Leaf Grade*Classer’s Leaf Grade*

Classer‘s Leaf Grade

Trash Measurement

(% area)

1 2 3 4 5 6 7 8

<= 0.08 <= 0.12 <= 0.18 <= 0.34 <= 0.55 <= 0.86 <= 1.56 > 1.56

* 1999 USDA crop data (4 year average)* 1999 USDA crop data (4 year average)

Documents

HVI Measurement Principles_By_AbuBakkar Marwat