UB-Lab 3C - The velocity vector profiler
NEW HARDWARE AND SOFTWARE RELEASE! (29/11/2023)
The UB-Lab 3C profiler measures accurate quasi-instantaneous co-located three (3C) components velocity profiles in the laboratory.
- High spatial and temporal resolution
- three components (3C) velocity profiles
- Web interface
The compact and splash-proof (IP65) enclosure of the UB-Lab 3C is adapted to harsh environments. This scientific instrument can be used within a laboratory. It breaks new ground by offering the user new capabilities in the fields of turbulence study.
The device is configured through a dynamic web interface and integrates an internal logger (5 GB, representing more than 1 billion profiles), enabling hours of monitoring (depending on configuration).
Communication goes through Wifi (optional ethernet).
The UB-Lab 3C can be equipped with 1 emitting transducer and four receiving transducers. The multi-bistatic technique provides an instantaneous three component (3C) velocity vector measurement along a single beam (1D profile) at a high spatial and temporal resolution. This technique is also known as ADVP (Acoustic Doppler Velocity Profiler).
The emitter and four receivers are provided with the device, as well as the holder to ensure an optimal installation.
A 2C version may also be provided, with only one pair of receivers.
Compared to the previous "UB-Lab 2C", the hardware and software were upgraded to get a third component, a more user friendly interface and remove block size limitation for continuous acquisition at maximal sampling frequency.
This system has been validated by comparison with the ACVP of the LEGI (Grenoble, France) during an ANR MESURE project.
|Measurement Performances||UB-Lab 3C|
5 to 300 mm at 1MHz
|Number of cells||2 to 200|
|Cell size||2.2 to 20 mm|
see Nyquist conditions.
Example of average velocity ranges for turbulence intensities of 8%:
|Velocity accuracy||0.2 to 1%|
|Velocity resolution||0.1 ppm (floating point representation with 7 significant digits)|
|Sampling rates||up to 64 Hz|
|Signal Processing||Coherent Doppler with phase coding|
|Number of configurations||1|
|Measurement modus||Bistatic Pulsed Coherent Doppler|
|Number of transducer connectors||5 (1 emitter and 4 receivers)|
|Type of transducer connectors||lemo for FFA.00.250|
|Frequency range||1.0 MHz|
|Beam width||3.3° half angle|
Electronics case: 174 x 116 x 56 mm
Transducers head: 209 x 93 x 93 mm
|Communication||HTTP through Wifi 802.11n (Ethernet optional)|
|Internal data logger||5 GB (more than 1 billion profiles)|
|File format||binary raw data (extractible in ASCII CSV compatible with Excel, Matlab …)|
|Velocity||Velocity profile data (relative to acoustic beam directions) per beam and cell|
|Echo||Backscattered echo RMS amplitude per beam and cell|
|Data Quality||Profile data quality indicator per beam and cell|
|Consumption||Typical: 4W, Max: 7.5W|
|ON/OFF||Button with LED indicator|
A three-components ADVP was developed and deployed on a beach in Brittany, France, for sediment transport study ... read more
A study on morphology and dynamics of subaqueous dunes done with a UB-Lab 2C (ADVP, bistatic) was presented at the Conference MARID AND RIVER DUNES VII ... read more
UB-Lab 2C - Sheet-flow
This video shows an example of setup for measurements in a sheet-flow condition in an open-channel flume with the UB-Lab 2C from UBERTONE.
In this paper, new data set of co-located 2C velocity and sediment concentration time-resolved measurements under steady uniform turbulent rough clear water and sheet-flow, performed with an Acoustic Concentration and Velocity Profiler (ACVP) and a prototype for a commercial ADVP, the UB-Lab 2C, are presented ... read more
A big step has been taken for ultrasonic instrumentation thanks to the ANR Astrid-ASMA project M.E.S.U.R.E (Métrologie mES hydroacoUstiques opéRationnElles - Operational hydroacoustic SSC metrology)! First results on the measurement campaign in the laboratory facility of the LEGI ... read more