Fakopp DynaTree Root And Trunk Testing System
Tree Inspection

    The stability of urban trees is a key question that affects everyone. Diseased and unstable urban trees pose much risk for everyone, and are a serious liability for municipalities in case of an accident. Tree stability assessment is therefore of the utmost importance. At present, there is only one accepted method for root stability assessment (inclino pulling test), while there are a few options to evaluate the condition of the trunk (elasto pulling testtomographies).

     

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The system consists of the following 4 components:
 
Anemometer 


An instrument for measuring wind velocity at or near the tree to be evaluated. The closer to the better, but, depending on wind velocity DynaRoot may provide reliable data even with measurements taken several kilometres/miles away. The anemometer provides wind velocity data of sufficient frequency, Ideally the anemometer should be clear of buildings or other objects that may obstruct the wind, at a height of at least 10m.

Dual axis inclinometer 

An instrument affixed to the root collar that measures the inclination of the trunk in two perpendicular directions. The instrument provides very accurate inclination data with sufficient frequency.

Elastometer 


An instrument attached to the trunk for measuring the micro elongation of the trunk.

DynaRoot evaluation software 

A PC software for evaluating wind velocity and inclination. The data, recorded over a period of several hours, are transferred from the anemometer and inclinometer on memory cards or wirelessly via Wi-Fi. The software breaks the data down into shorter intervals, and calculates statistical parameters for each interval that are used for the tree stability evaluation.


Anemometer

Sampling rate
1 Hz
Measurement range
0-150 km/h
Accuracy
0.2 km/h
Integrated GPS
G-STAR IV BU-353-S4
Maximal SD card size
8GB
Wheatherproof
yes, IP65

 


 

Dual axis inclinometer
 
Measurement range
±2°
Resolution
0.001°
Sampling rate
10 Hz
Integrated GPS
G-STAR IV BU-353-S4
Maximal SD card size
8GB
Weatherproof
yes, IP65
Operating voltage and currents
12 V, 20 mA

 


 

Extensiometers
Type
LVDT
Dimensions
30x30x270 mm
Span
250 mm
Sampling rate
10 Hz
Resolution
0.3 μm

 

Power source
2 pcs. of 9 V batteries

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