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ARBOTOM

- Manual

Problem:

I am analyzing stem disks using ARBOTOM

in a test environment.

The measurements results do not resemble the condition of wood.

Explanation: ARBOTOM

is constructed for investigation of living trees. Dead or dry wood

cannot sufficiently be investigated with ARBOTOM

, because of different

reasons:

•

Drying cracks disturbing the measurement and will lead to insufficient
results.

•

The underlying material (e.g. a table) will possibly conduct the stress
waves and therefore disturb the measurement.

Solution:

•

Be sure that the stem disk is fiber saturated with water and does not
reveal any cracks.

•

Insolate the disk from the underlying material with soft matter, which does
not transfer any stress waves.

Содержание ARBOTOM

Страница 1: ...ortant information Please read carefully Contains important information Please read carefully Contains important information Please read carefully Contains important information Please read carefully...

Страница 2: ...ARBOTOM Manual 2...

Страница 3: ...OTOM Manual 3 Copyright 2012 Frank Rinn Heidelberg All rights reserved worldwide The software described in this reference may be subject to changes Updates are available via the Internet www rinntech...

Страница 4: ...VALUES 28 GRAPHIC DISPLAY 30 LINE GRAPH 31 Graph options of the line graph 32 SURFACE GRAPH 34 Graph options of the surface graph 35 ADDITIONAL MODULES 37 UNLOCKING MODULES 38 3D TOMOGRAPHY 39 3D GRAP...

Страница 5: ...repair the device Do not over bend or fold the cables After finishing your measurement remove the pins from the tree to avoid injuries of others Never use the sensors to remove the attached pins from...

Страница 6: ...ents are in their precision and informational value limited reconstructions of the inner mechanical condition of the tree They should therefore not be used as sole base of decision for evaluating the...

Страница 7: ...d that is damage by decay or cracks To get the best results possible the user should have very good knowledge about wood anatomy Each ARBOTOM sensor is equipped with a vibrometer and electronic regula...

Страница 8: ...ides the vibrometer they contain the processing units to digitize and interpret the signals In practice the sensors are connected in a line Therefore each sensor has two sockets for the connecting cab...

Страница 9: ...IMPORTANT The battery pack also has to be recharged from time to time when not in use We recommend checking the battery charge condition every month and recharging if the charge is too low Charger Th...

Страница 10: ...er over bend or fold the cables The cables are for connecting the sensors among each other and for connection the Battery Pack with the sensor chain only Do not connect the cables directly to the comp...

Страница 11: ...graphic All basic data are recorded sensor positions distances runtimes velocities percent errors The software saves all measurements and they can be printed on a color printer It is necessary to use...

Страница 12: ...t the RINNTECH Software CD into the CD ROM drive 2 After a while the CD starts automatically Choose your language Please note that opening the installation file is possible by using the Windows Intern...

Страница 13: ...nual 13 5 The Setup Program will be started Please follow the instructions 6 After successful installation the software must be unlocked by RINNTECH see next chapter It will offer full performance whe...

Страница 14: ...hown Show toolbar Shows toolbar underneath the menu bar necessary PC COM Port Choose the COM Port the serial cable is attached to In case you are using a USB connection please check the hardware confi...

Страница 15: ...quested angle This makes sense if you want to orient the graph according to compass direction or other criteria Filter The measurements can be filtered via the standard deviation distribution classes...

Страница 16: ...he wood Therefore it is absolutely necessary to indicate the tree species North To orient the north arrow Height Height of measuring level above ground Especially needed in case of 3D measurements Pos...

Страница 17: ...ody language of the tree will help to make your choice easier Choose an adequate number of sensors Small trees may require fewer sensors whereas you will need mores sensors for big trees Keep in mind...

Страница 18: ...ensors in northward direction Sensor positioning on asymmetrical cross section Step 2 Fix the sensor pins around the trunk at the selected positions Please note The function of the pins is to hold the...

Страница 19: ...correct connection of the sensors o Correct function When sensor chain is connected correctly all sensors except the last one will show a green LED when the battery pack is switched on The LED of the...

Страница 20: ...be measured at This way of measuring the geometry has the advantage that it can be done by only one person It is sufficient in its precision for most of the cases Step 1 Open the options menu in the...

Страница 21: ...n Pos Make sure the unit chosen is the same as on the measuring tape Start at the first sensor This sensor will have the highest value For a circumference of 2 05m e g enter 205 Enter the value of the...

Страница 22: ...se of the cross section shown on the right the positions of sensors 2 4 6 8 and 11 need to be corrected To do this write down the deviation from circularity of the sensors in the column Radius Differe...

Страница 23: ...s now shows the distances between the sensors These distances will be taken into account for calculating the runtimes Step 6 Complete the datasheet adding information about the project location tree t...

Страница 24: ...t your notebook Some notebooks come with a built in Bluetooth switch and control diode An active Bluetooth should be indicated in the Windows task bar 2 Open the Bluetooth environment on your notebook...

Страница 25: ...needs to be reconnected every time you switch it on again Step 2 Start the sensor recognition Hit any sensor once A confirmation sound can be heard at the notebook and in the table Positions all senso...

Страница 26: ...ues disturbance due to wind If the software failed to record a correct signal a deep acoustic signal will appear Repeat the measurement in this case Step 5 Check the Runtime table if a signal has arri...

Страница 27: ...e value shown is below 10 Usually 5 10 measurements should be enough to receive reliable results In some case the number may be higher Step 8 Stop the measurement by clicking on the red square Step 9...

Страница 28: ...nary high values This may be caused by large hollow spaces within the trunk branch Measurements which are outside of the minimum and maximum values written in the Option Options General Filter will be...

Страница 29: ...formation for the evaluation of the state of the wood Please take into consideration that the impulse velocity corresponds with wood density and elasticity Higher density and elasticity of the wood le...

Страница 30: ...least two levels and the 3D module is unlocked The whole spectrum of values will be presented by a color palette which can be chosen in Options IMPORTANT The color palette represents the range of val...

Страница 31: ...nce it shows the range from low red to high velocities corresponding to a traffic light You should note that in case of a wood defect the signal between two sensors does not allow to localize the dist...

Страница 32: ...cumference color Select the color of the trunk or branch circumference line Show legend Switches the graph legend on off Show typical speed Shows typical impulse velocities Show level info Shows the l...

Страница 33: ...tables derived from other measurement devices cannot be applied to ARBOTOM Lines Show all levels in one graph In case of a 3 D measurement all levels will be shown in one graph if this box in checked...

Страница 34: ...calize wood defects As a default the color palette is scaled according to the range of velocities from the lowest to the highest value You must take into consideration that this does not necessarily r...

Страница 35: ...xt color Circumference color Select the color of the trunk or branch circumference line Show legend Switches the graph legend on off Show typical velocities Shows typical impulse velocities Show level...

Страница 36: ...e applied to ARBOTOM 2D Surface resolution Choose the appropriate graph resolution The system will select an optimal resolution automatically Beware of artifacts due to an overstressed resolution If t...

Страница 37: ...ARBOTOM Manual 37 Additional modules Important All additional modules are only available if the modules are unlocked If you are interested in one of the modules please get in contact with us...

Страница 38: ...fill in the registration form completely This helps us to provide the optimal support possible The fields name Street zip code and town are compulsory 4 Print the form click the button Print and send...

Страница 39: ...ext and the following circulations are assigned to further levels Sensors can also be ordered in distinct levels or like a screw around the tree If using the screw like setting you should not be using...

Страница 40: ...ARBOTOM Manual 40 Example for 3 D positions with screw like sensor attachment...

Страница 41: ...ional sections through the trunk or branch For a reliable three dimensional scanning you should use at least 16 sensors The 3D graph provides two independent axial sections and three cross sections Th...

Страница 42: ...up and downwards by moving the vertical position control switch right If you move it to the uppermost position the intermediate coincides with the upper section If you move it down to the lowermost po...

Страница 43: ...ARBOTOM Manual 43 Example of different cross sectional layers The intermediate layer can be shifted up and downwards...

Страница 44: ...wo axial sections through the area investigated As a default the sections are oriented perpendicular to each other Position and angle of the sections can be controlled by the control bars at the botto...

Страница 45: ...Circumference color Select the color of the trunk or branch circumference line Show legend Switches the graph legend on off Show typical velocities Shows typical impulse velocities Show level info Sho...

Страница 46: ...s cannot be applied to ARBOTOM 3D 3D algorithm The 3D graph can be computed using different algorithms We recommend the next line method 3D resolution Resolution of the graph in pixel Lower values inc...

Страница 47: ...trunk or branch and therefore reduces the moment of resistance If the decay reaches 50 of the radius the resulting bending stress is hardly affected At 30 residual wall thickness the stress of the out...

Страница 48: ...indicates the precise direction Geometric moment Wg without consideration of internal decay and other damages as a gray line default Weighted moment Ww with consideration of internal decay and other...

Страница 49: ...ount Shear stresses which appear e g due to torsion are not taken into account In practice very low residual wall thickness and asymmetric tree shapes can reduce the tree stability additionally and af...

Страница 50: ...is circumstance every case has to be analysed and evaluated individually From our experience from all the trees we have inspected with this method so far it is to be assumed that if a root is highly d...

Страница 51: ...p 1 Safe the data of the stem base tomography Now safe this file again under a new name e g oak_root and delete all measured values from this new file Step 2 Connect the cable of the root sensor to th...

Страница 52: ...not carry the impulse properly for example in sandy grounds Again sensors that received a signal will show a blue light sensors that did not receive a signal will show a red light while measuring Step...

Страница 53: ...quality cannot be derived from the impulse tomogram directly In particular differences between wood species must be taken into account The ARBOTOM user takes the responsibility for interpretation of...

Страница 54: ...om the Windows control panel or possibly used by another program If necessary restart the PC Set the energy supply of your notebook to maximum power Windows control panel Explanation Some Notebooks sw...

Страница 55: ...ly be investigated with ARBOTOM because of different reasons Drying cracks disturbing the measurement and will lead to insufficient results The underlying material e g a table will possibly conduct th...

Страница 56: ...ed every 2 years to ensure greatest precision If it should be necessary to return the device for maintenance service or repairs please add a clear description of the occurring error If you are located...

Страница 57: ...not take any liability for damages of normal wear and tear nor for damages which may occur after the passage of risk as a result of incorrect or improper handling or through excessive use The warranty...

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