[FREEFORM-ADCP] An open toolbox for the design and operation of arbitrary geometry mono-static ultrasonic velocity profiling systems

FREEFORM-ADCP is a MATLAB-based toolbox developed to support the design and operation of mono-static ultrasonic velocity profiling systems of arbitrary geometry. The toolbox enables: (1) Acoustic beam orientation definition and internal transducer parameter tuning as function of a target focal point , (2) Acoustic beam and bin mapping, and (3) Transformation of multi-beam velocities to 3D velocity. This toolbox applies to mono-static ultrasonic profiling systems (which measure velocity via the acoustic Doppler technique) of arbitrary geometry, with parameters such as the number of transducers, transducer location, orientation, and geometrically convergent or divergent configuration. Thanks to its universality, this toolbox applies to the use of standard diverging-beam Acoustic Doppler Current Profilers (D-ADCPs), stand-alone or distributed, along with novel systems including converging-beam ADCPs (C-ADCPs), fixed or actuated. This toolbox has been used to advance the design and operation of novel sensor techniques for flow characterisation, and is intended to support further development.