Description
PiCUS TreeQinetic Description
The tensile test with the PiCUS TreeQinetic provides you with all the measurement data you need to determine the root condition and the resistance to trunk breakage. During the tensile test, the tree is exposed to a defined equivalent wind load. The PiCUS TreeQinetic records three measured variables at the same time:
- Applied force
- Stretching or compression of the wood fibers
- Root plate inclination
To do this, the tree is pulled with a rope attached to the crown and with the help of a wrench. The load generated in this way and the reaction of the tree are measured with the Forcemeter, Inclinometer and Elastometer of the PiCUS TreeQinetic.
In this way, it is possible to determine how a tree behaves under load with a single measurement setup.
The various sensors of the PiCUS TreeQinetic
The inclinometer and elastometer sensor elements record the tree’s reaction to the load in different ways.
Inclinometer
The TreeQinetic inclinometers measure the inclination of the root plate and trunk under the tensile load. This can be used to evaluate the root stability and the anchoring force of the tree in the ground.
Elastometer
The elastometers record the elongation or compression of the outer wood fibers of the trunk. The measured values serve as a basis for estimating the break resistance.
PiCUS TreeQinetic range of functions:
Range: Action radius up to 60 m
Accuracy: Elastometer: 0.1 µm; Inclinometer: 0.005 °; Forcemeter: 0.3 kN
Connection: Wireless data transfer of all measurement data to the PC
Force build-up: A mechanical gripper pull with steel cable to build up the tensile force is optionally available in two variants
Expansion: The system can be upgraded with additional sensors at any time
Measuring principle
The measuring principle:
During the tensile test, the tree is loaded by means of a rope that is attached to the crown and is pulled with a winch. The reaction of the tree to this load and the load itself are recorded: The TreeQinetic Forcemeter measures the force in the rope strand, while the TreeQinetic Elastometer measures the elongation or compression of the edge fibers of the trunk and the TreeQinetic Inclinometer measures the inclination of the root plate. These measured values are displayed live by the TreeQinetic software and saved after the test. For further evaluation, these values can be processed using additional software (arbostat, http://www.arbosafe.com). By comparing the tree reaction to a known equivalent load with the calculated load of an expected storm, a safety factor for breakage and stability is calculated.
Technical details
Technical details
TreeQinetic Elastometer
The elastometers measure the compression or elongation of the edge fibers of the trunk.
| Resolution |
0.1 µm |
| Accuracy |
1 µm |
| Measuring range |
+/- 2 mm |
| Battery life |
~ 20 h at 20 ° C (wireless operation) |
| Distance between measuring tips |
198 – 202 mm |
| Diameter measuring tips |
2 – 4 mm |
TreeQinetic Forcemeter
The TreeQinetic Forcemeter measures the force that is coupled into the tree via the rope during the tensile test. For improved handling, a protractor is integrated that records the rope angle while pulling.
| Resolution: |
0.01 kN |
| Accuracy: |
0.3 kN |
| Measuring range: |
0 – 40 kN |
| Battery life: |
~ 15 h at 20 ° C (wireless operation) |
TreeQinetic Inclinometer
The TreeQinetic Inclinometers measure the inclination of the tree (root plate and trunk).
| Resolution: |
0.002 ° |
| Accuracy: |
0.005 ° |
| Measuring range: |
+/- 15 ° |
| Battery life: |
~ 20 h at 20 ° C (wireless operation) |
| Maximum distance of the radio transmission: |
3 to 30 meters |
Software
The measurement software for the PiCUS TreeQinetic measuring system combines all the necessary functions for device control, measurement execution, and documentation. Available for Windows, Android, and iOS, it offers professionals maximum flexibility in tree inspection. With its intuitive operation and seamless integration into the IML Cloud, the app enables mobile data collection, documentation, and synchronization directly on-site.
Compatibility
Not all older PiCUS TreeQinetic systems are compatible with the latest version of the app.
To use the measuring system with mobile phones or tablets, a Bluetooth Low Energy-enabled radio module is required. When the system was modernized with Bluetooth Low Energy, the communication protocols also had to be updated (regardless of whether communication is via Bluetooth Low Energy, Bluetooth Classic, or USB). Older radio control units do not yet support these modernized protocols, which is why they are generally not compatible with the current IML TreeQinetic software.
Use the following table to check the compatibility of your device.
The version information will be briefly displayed when you switch on the radio control unit.
| Hardware Version |
Firmware Version |
Compatibility |
| 0.1.0021 / 0.1.0022 / 0.1.0023 |
0.2.0815 or newer |
Fully compatible |
| 0.1.0021 / 0.1.0022 / 0.1.0023 |
0.2.0814 or older |
|
| 0.1.0020 or older |
0.2.0814 or older |
Hardware and firmware upgrade required (device must be sent in) |
To the software
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