Fakopp 3D Acoustic Tomograph

Introduction

Fakopp 3D Acoustic Tomograph is able to non-destructively detect the size and location of decayed or hollow parts in the trunk. It works based on sound velocity measurement between several sensors around the trunk. The basic measurement principle is that sound velocity drops if there is a hole between two sensors.

Step by step

Drive the transducers through the bark using a rubber hammer with even spacing around the trunk.
Measure the distances between the transducers with a caliper and enter the measured data to the computer.
Tap each transducer with a steel hammer to generate sound waves. Fakopp 3D measures the travel times with microsecond precision to each transducer and transmits the data to the computer.
The software calculates and displays the internal sound-velocity distribution of the tree.
Measurements at several heights can be assembled into a 3D model

User's Maunal

You can downoad the User's Manual here.

Package contents

SD02 Piezo transducers
Amplifier boxes
Battery box
Cables to connect amplifier boxes and battery box
Caliper for measuring sensor positions
Sensor remover tool
Tape measure
Steel hammer for tapping transducers
Rubber hammer for fixing transducers
Case

Technical parameters

Measured time precision	+/- 2 microseconds
Sensor	Low noise SD02 piezo sensor
Number of sensors	Variable from 8 up to 32
Amplifier box size	127 x 58 x 25 mm
Power consumption	240 mW
Power supply	Standard (rechargeable) 9V block battery
Continuous operation time with one battery	Approximately 2 hours
Carrying case	Peli Case 1500
Total weight including case, hammers and 10 sensors without PC	6 kg
PC connection	RS232 over cable or Bluetooth
Data transmission time per sensor tap	Below one sec
Total measurement time of one tree at one layer including assembly, geometry registration, tapping and disassembly with 10 sensors	20 minutes
Operating temperature range	0 to 40 degrees