How it works
The PiCUS works by taking readings of the velocity of sound waves through the stem from several sensors. Small nails are used to install the sensors around the trunk, and each sensor is struck in turn to pass sound waves through the tree. The result is recorded and computed to provide and a full colour Tomogram (visual picture of the readings), which gives an indication of the consistency of the wood within the tree, and whether or not there is decay present.
< 3D Sonic Tomograph
Using multiple PiCUS tests at various heights, we can extrapolate the extent of decay within the trunk of a tree.
This example used 5 separate PiCUS tests at various heights.
The PiCUS Sonic Tomograph is an instrument which can detect and quantify decay in trees, without causing significant damage to the tree in the process.
For example, if your tree has a cavity, or has fungal fruiting bodies present, using this equipment we can gather information about the extent of the decay. Together with our professional visual assessment we can inform a decision about any action or remedial tree work that might be required.
We ensure that our equipment is up to date and we are currently using PiCUS 3 and Resistograph PD300 systems.
This ensures that TMA continue to undertake detailed decay investigation using the most up to date technology, in turn providing comprehensive evidence to enable informed decisions on tree management.
PICUS tomogram >
PICUS tomogram shown in situ >
To ensure the best possible result some projects require readings using resistoraph alongside the PiCUS.
Resistograph testing involves measuring the levels of resistance to drilling by passing a very fine drill through the wood to determine its consistency.
PICUS 3 compact callipers
We measure the trunk with callipers to ensure that we accurate identify the shape of the tree so that the picus gives the most accurate reading.