Arbotom Sonic Tree Tomography

TREE DIAGNOSTICS

What is Sonic Tomography?

Sonic tomography is an advanced method used to examine the internal structure of a tree by analyzing how sound waves travel through it. Imagine it like using sound to take a peek inside a tree's trunk, similar to how an ultrasound or MRI works for humans. This technique helps identify internal defects like hollow areas, decay, or cracks that aren't visible from the outside.

When performing advanced tree risk assessments, it is crucial to the extent and configuration of internal decay. The Arbotom employs sonic tomography to assess wood in both good and decayed conditions.

A series of sensors are placed around the tree trunk or limb, each connected to the next and then to a computer. Each sensor is tapped, sending a stress wave the wood to the other sensors.

When wood quality is high ( wood, no defects), the stress waves travel rapidly. When wood quality is low (decay present), the stress waves take longer to move through the wood. If wood is missing (cavity or crack), the waves must travel around that area, taking significantly longer to reach the other sensors.

The data produced is called a tomogram, which displays the stress wave travel times. Interpreting the tomogram allows the user to better understand where decay might be present, as well as the type and extent of the decay. Used in conjunction with the strength loss module, users can better predict what may be happening inside the tree.

In many, it is useful to use a Resistograph as a follow-up diagnosis by drilling at one or more of the Arbotom sensor points to confirm the presence or absence of decay and refine the analysis.

When used in combination with the new ArboRadix root sensor module, can help locate roots underground.

Tree wind load analysis & safety evaluation

We use two additional Rinntech software modules. One is theWiLo™ program, which is used to assess and analyze predicted wind loads and see how crown reductions might affect tree stability Using the ArWiLo™ app allows for estimation of the crown area and the load center (the focused wind load point in crown). Using a phone or tablet the field, take a photograph the tree, map its geometry in the application, and measurements of the tree crown,, and height. The wind load of the tree can be calculated from these parameters and serves as a reference for virtually shortened crowns.

The second module is the ArboStApp, which provides a tool for determining loss due to structural defects in the cross sections of stems and, as well anchorage plate losses in relation to canopy size and expected wind loads. Additionally, the application the evaluation of load reduction through crown reduction pruning to achieve higher safety in damaged trees. The inputs are based on the user's visual observations rather than diagnostic, but they enable accurate if not as precise) estimations of safety, which are sufficient for many tree assessment purposes. However, the precision of the evaluation can be increased by incorporating results from proper sonic tomography or resistance drilling with density-calibrated devices.

We undertake assessments throughout the North West, Greater Manchester, Cheshire, Lancashire, Merseyside and nationally for various projects.  Before we can head out to your site and conduct a assessment, we’ll need to ask you a few critical questions about your project.

Fill out our quick and easy online form so we can capture the most important project information and provide you with a free quote that includes everything you need to know.