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IML Instrumenta Mechanik Labor Electronic GmbH
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PiCUS - Model TreeMotion -Tree Wind Reaction Measurement Sensor

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The wind reaction measurement of the TreeMotion Sensor records the swinging movement of trees under real conditions and allows conclusions to be drawn about the anchoring of the roots in the ground. In addition to the properties of the tree, all factors influencing the environment on the wind are taken into account. This allows the stability to be assessed in the actual wind exposure. A base sensor directly measures the root plate inclination at the base of the trunk. A control sensor measures the inclination at a height of 2 to 3 meters so that the real wind reaction of the tree can be distinguished from sources of interference. The PiCUS TreeMotion Sensor can independently record the measurement for hours, days or weeks. The data evaluation takes place comfortably in the office.

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Prerequisites for a successful measurement are gusts of more than 45 km/h and a measurement time of at least 2 hours.

Analyze entire groups of trees at once
Compare the slope values of several neighboring trees,
to efficiently identify individual endangered trees.

Fast and with little effort
A good application of the TreeMotion Sensor is the comparative analysis of groups of trees. Several trees are equipped with sensors at the same time before an expected storm. For example, all trees in an avenue can be tested very quickly with little effort.

PiCUS

TreeMotion range of functions:

Sensors: 10 sensors included (also available as a mini kit with 2 sensors to get started)
Accuracy: Inclination measurement accurate to 0.03°
Inconspicuous: Less risk of vandalism due to small sensors (61 mm x 41 mm x 20 mm)
Running time: 2 weeks + integrated charging station that can be used to charge 10 sensors wirelessly

Scope of delivery (starter package):
  • Transport case
  • 10x sensors
  • charger
  • Software
Scope of delivery (mini kit):
  • Mini transport case
  • 2x sensors
  • Charging power supply
  • Mini software

The wind reaction measurement records the dynamic swinging movement of the tree in natural wind. The inclination of the root plate is measured.

The advantage:

The reaction of the tree is measured directly, including all environmental conditions! This includes tree properties (size, crown shape, …), the wind strength and direction, as well as the wind exposure of the tree (mainly buildings and other trees in the area). In contrast to this, in the tensile test (Wessolly & amp; Erb, 1998), which is a tried and tested method for assessing defects in the root area, an artificially generated wind substitute load is introduced into the tree. The relation to the actually occurring natural wind is difficult to estimate because of the environmental effects mentioned above.