timber measurements society · • timber measurements society ... •ripasa mill, ripasa, brazil

• TIMBER MEASUREMENTS SOCIETY• Fall Meeting

• October 28-29 2008

•Christian Paccot – Woodtech, Chile

LOGMETER 4000An example of whole-load scanning technology applied to Wood Measurement

Agenda

•o Woodtech o Logmetero How it works

o 3D Presentationo Description of Measurement Processo Mathematical Models

o Some Installationso Results and Limitations

o Repeatability – Precisiono Automaticityo Periphery Logs

o Benefitso Conclusion

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•Woodtech

• Specialist in Automatic Wood Measurement Systems since 1990

• Created from Excelsys’ association with the largest

Financial Group in Chile - main shareholder of ARAUCO

• Products specifically for wood measurement on Trucks

• Measurement of solid and frame volume, as well as the

biometric characteristics of the wood.

Presence today : Latin American Product for the World

Main Partners

– Strategic partnership with:

– SKS Vision Systems (Finland)

– Mogai ( Brazil )

– Endeavor enterprise

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CHILE

BRASIL:

ECUADOR

USA

ARGENTINA

Clients

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LOGMETER

Measures: Solid volume, frame volume, and biometric characteristics of the wood Automatic operation

HIGH-PRECISION LASER SYSTEMS FOR THE MEASUREMENT OF MEDIUM AND LARGE MILLS’ WOOD LOADS

Measures: Frame volume of wood loadsEasy to install and move

PORTABLE LASER SYSTEM FOR THE MEASUREMENT OF SMALL MILLS AND FOREST OPERATIONS’ WOOD LOADS

Solid and frame volume

3D laser technology – 50,000 captures per second per laser

Pulp and saw wood

Shotgun and crosswise loads

Fixed-length, variable-length, and tree-length

Biometric information for individual logs: number of logs, lengths, diameters, sweep, and crook

Measurement of chips and biomass

Advanced auditing system

Integration with the mill’s ERP system

Easy-to-use and modern user interface

Chips

•Shotgun

•Variable-length

•Tree-length

Crosswise

Logmeter® 4000Characteristics

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Logmeter® 4000

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Measurement Process

•Stage 1: CaptureCaptures the truck in movement.

30-45 seconds per capture.*

150,000 samples per second.

Capacity of up to 960 trucks per day.

The picture is stored automatically

for auditing.

• * Source: Nueva Aldea mill (Arauco), Chile

•Berneck installation, Brasil

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•Stage 2: ProfilesAs the truck passes, “profiles” are

captured.“Cuts” every 5cm – aprox. 400 cuts are

generated for a standard load.

Millimetric precision – high definition.

Measurement Process

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•Stage 3: Frame volumeGrouping of the profiles generates

a 3D image.

Sophisticated image recognition algorithm separates the wood from

the truck.

Calculates the frame volume taking

into account more than 1,000,000 measurements.

99% accuracy – certified by

DICTUC.*

•*DICTUC (Dirección de Investigación Científica y Tecnológica de la Pontifícia Universidad Católica de Chile) commercially develops and implements projects of innovation and technology transference in national and international markets.

Measurement Process

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•Stage 4: Biometric variablesPeriphery logs are modeled.

Each log in the periphery is an

individual 3D object.This allows for the calculation of

biometric variables:

• length

• diameter• curvature

• stacking

• etc.

• Curvature

• Stacking•Lengths

• Diameters

Measurement Process

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•Stage 5: Solid volumeIdentification of characteristics for each

log in the periphery.

The solid volume is calculated with a

mathematical model using the aforementioned variables.

An individualized model is calibrated

for each species in each mill in order to

ensure accuracy.The models can be updated

periodically.

•Length

•Width

•Height

Measurement Process

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•Stage 6: Results and auditing

Results are sent to the mill’s ERP

(including pictures and 3D images).

All of the data is accessible by

Internet.

The auditing system allows for users

to filter the data by certain criteria and even electronically measure a

truck (in the case of doubts, for

example).

Measurement Process

Logmeter® 4000Log identification

Logmeter® 4000Real capture

•Logmeter® 4000• Real capture

Logmeter® 4000Real capture

Formula: ...5432155443322110 XXXXXVVsol ext

Mathematical Models

Vext is typically :

• For a Pulp mill 10%-20% of total volume

• For a Saw mill 40-60% of total volume

• Example of a study for US prospect:

• For these samples, 46% to 65% of logs are on the periphery

• An easy figure to remember: 30 cm diameter 50% wood is on the periphery

• Formula:

• Other terms:– i , i are regression coefficients– Xi, variables do not depend on the log:

Load profile every 3cmAverage widthAverage diameterDiameter distributionSweep & crookPile arrangementAmongst others

...5432155443322110 XXXXXVVsol ext

Mathematical Models

Logmeter® 4000

•“The objective of acquiring a Logmeter is

to have a trustworthy and effective

measurement that can be relied upon and

that ensures fair deals.

•Gunther Hinrichsen, Nueva Aldea Mill Fiber Superintendent, Celulosa

Arauco, Chile

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•A few installations• Date of installation: • April 2007• Place of installation:• Conpacel Mill (ex-Ripasa),

BRAZIL• Annual volume scaled:• 3,0 million m3

• Date of installation: • March 2007

• Place of installation:• Nueva Aldea, CHILE

• Annual volume scaled:• 3,8 millions m3

• Date of installation: • January 2006

• Place of installation:• Astex, CHILE

• Annual volume scaled:• 0.65 million m3

• Date of installation: • May 2008

• Place of installation:• Berneck, BRAZIL

• Annual volume scaled:• 1 million m3

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Frame volume accuracy

• Validation bundle: A structure of PVC tubes

that simulates a bundle of wood. The

volume of the bundle can be modified by

adding tubes and it is easy to measure the

bundle precisely by hand.*

•How is frame volume accuracy verified?

• Adjusted manual measurement (AMM):

Manual method in which up to 50 height,

width, and length measurements are taken

(versus less than 10 with normal manual

measurement).

• * A validation bundle is included with all Woodtech solutions.

Frame volume accuracy

•Source: Nueva Aldea, May and June, 2007

Wood Lengths 2,4m 4,0m & 6,0m* Variable

Number of Trucks 100 121 60

Maximum Difference 3,2% 2,9% -

Average Difference 0,2% 0,3% 0,6%

•Comparison of Logmeter volume compared to adjusted manual measurement

•Manual error

•Logmeter difference•Variable•2,4m •4,0m & 6,0m

•Results

•Solid volume accuracy•According to results in mills, the distribution of differences curve is the following:

• Performance measurements:Average of the differences 0%.Standard deviation of the differences 3%-95% possess a difference less than 5.0%

Repeatability

• Objective:• Validate that Logmeter measurements are

repeatable.

• Test Protocol:The validation bundle is loaded on a truck.

The truck is measured “n” times (+/- 10) by the Logmeter® 4000.The measurements (frame volume) are compared to the exact known volume.

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•Trials

Validation bundle• Test PRF_RP_001• Ripasa Mill, Ripasa, Brazil• 2007• Results

Repeatability

Validation bundle•Test PRF_RP_001•Ripasa Mill, Ripasa, Brazil•2007

•Conclusion:•A measurement that is not repeatable cannot be precise.

•When measuring the validation bundle, the Logmeter consistently measures the frame volume accurately, with an average absolute difference of 0.45%.

•Logmeter’s measurements are highly repeatable and precise.

Repeatability

Formula: ...5432155443322110 XXXXXVVsol ext

Mathematical Models

Vext is typically :

• For a Pulp mill 10%-20% of total volume

• For a Saw mill 40-60% of total volume

• Example of a study for US prospect:

• For these samples, 46% to 65% of logs are on the periphery

• An easy figure to remember: 30 cm diameter 50% wood is on the periphery

• Formula:

• Other terms:– i , i are regression coefficients– Xi, variables do not depend on the log:

Load profile every 3cmAverage widthAverage diameterDiameter distributionSweep & crookPile arrangementAmongst others

...5432155443322110 XXXXXVVsol ext

Mathematical Models

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ACCURACY: Traditional measurement methods tend to overestimate

the quantity of wood received, thus increasing transport and harvest

costs. The Logmeter® 4000 takes more than 1 million

measurements per truck. As it more precise, it does not

overestimate the loads.

SPEED: Reduces operational costs as it requires less operators. Also

reduces truck waiting times, allowing for more transport cycles.

AUTOMATICITY: Does not involve many processes nor does it

require specialized operators, thus minimizing data-entry errors.

AUDITING: Allows for later revision of all results as well as remote

access for suppliers and for headquarters. This reduces the

possibility of fraud and loss.

•Main Benefits•Directs

•All Woodtech solutions offer the following direct economic benefits:

•Indirects

TRANSPARENCY: Reduces conflicts with suppliers as the

measurement process is objective.

NO SAMPLING: All trucks are measured. This eliminates conversion

factors and uncertainty regarding sample representativity.

SAFETY: Zero risk for the operator as he/she does not need to get

on top of the load.

ECO-FRIENDLY: 100% safe for the environment – does not use fuel

or lubricants.

•All Woodtech solutions offer the following indirect economic benefits:

Main Benefits

Correctly quantify wood is important...But far from simple

There is no perfect method …But there are advancements.

[email protected]@woodtechms.com

•THANKS

timber measurements society · • timber measurements society ... •ripasa mill, ripasa, brazil

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