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Types of ADVMs

Types of ADVMs. Streamflow Records Computation using ADVMs and Index-Velocity Methods Office of Surface Water. Common ADVM Types. SonTek Argonaut “family” SL – Side Looker SW – Shallow Water ( Uplooker 2-D) XR – Extended Range ( Uplooker 3-D) ADV – Velocimeter (2 or 3 D )

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Types of ADVMs

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  1. Types of ADVMs Streamflow Records Computation using ADVMs and Index-Velocity Methods Office of Surface Water

  2. Common ADVM Types • SonTek Argonaut “family” • SL – Side Looker • SW – Shallow Water (Uplooker2-D) • XR – Extended Range (Uplooker3-D) • ADV – Velocimeter (2 or 3 D) • RDI Channelmaster • Ott SLD

  3. SonTek Argonaut-SL – Description (1.5 Mhz) “NEW” • ADVM consists of: • Electronics housing • Transducers for velocity measurement • Acoustic stage transducer • Pressure sensor • Thermistor • Dimensions/Weight • 6” x 7.1” (15 cm x 18 cm) • Weight (in air): 2.5 kg “OLD”

  4. 1.5 MHz SonTekArgonaut-SL – Sample Volume, S, (Range-averaged cell) Nominal Max Range: 20 m* Min: 0.50 m Min Cell Size: 0.5 m *assumes adequate flow depth andbackscattering material

  5. SonTek Argonaut-SL – Specifications Velocity: Features: Acoustic Frequencies: 3, 1.5, 0.5 MHz Beam angle: 25º Output Sample rate: 1Hz Internal Memory: 4 MB • Maximum: ± 6 m/s • Resolution: 0.1 cm/s • Accuracy: ± 1% of measured velocity or ± 0.5 cm/s (whichever is greater)

  6. SonTek Argonaut-SL – SDI-12 Multi-cell Option Output for each cell SDI-12 Output Temperature Pressure Level Cell End Velocity X-comp Velocity Y-comp Velocity Magnitude Signal-to-Noise Ratio • Velocity X-component • Velocity Y-component • Velocity Magnitude • Signal-to-Noise Ratio • Each cell has a unique SDI address

  7. Argonaut-SL Features – Upward-looking Stage Sensor • A pressure transducer is used with the acoustic transducer to improve accuracy. • Sets a stage “window” to eliminate spikes • Preliminary tests indicate possible accuracy of about 0.6 cm. • Used for: • Primary Stage • Redundant Stage • Effective flow depth (ice) • Standard on SLs

  8. SonTek Argonaut-SL – Multi-cell Option • Up to 10 individual cells • Advantages • Very useful for QA of data – comparison of cell velocities, horizontal flow distribution • May be used if range-averaged cell is biased • Disadvantages • Smaller cells = increased velocity measurement uncertainty • More data to record (on-site) and store (in database or electronic archive)

  9. SonTek Argonaut-SL – Options • 0.5 MHz (500 kHz) • Range: 1.5 – 120 m • Pressure, tilt/level sensor • 1.5 MHz (1,500 kHz) • Range: 0.2 – 20 m • Pressure, tilt/level sensor • PowerPing • 3.0 MHz (3,000 kHz) • Range: 0.1 - 5 m • PowerPing Photos courtesy of SonTek/YSI

  10. SonTek Argonaut-SW • 2-D, vertically-oriented, ADVM. Measures streamwise & vertical velocity • 3 MHz acoustic frequency • Uplooking acoustic stage sensor • Dynamic Boundary Adjustment for depth-integrated sample cell based on vertical beam Photo, sketch courtesy of SonTek/YSI

  11. SonTekArgonaut-SW – Specifications • Stage range: 0.3 - 5 m • Max velocity: 5 m/s • Accuracy: ±1% of measured velocity or ± 0.5 cm/s • Recorder capacity: 4 MB • Up to 10individual depth cells • Depth-integrated sample cell(uses vertical depth measurement) Argonaut-SW and mounting plate Photo courtesy of SonTek/YSI

  12. SonTekArgonaut-XR • 3-D, vertically-oriented, ADVM • Sensors: Pressure, Compass, Pitch-roll • Dynamic Boundary Adjustment for depth-integrated sample cell (uses pressure data) • 10 individual cells

  13. SonTekArgonaut-XR – Dynamic Sampling Volume (DSV) • Used to measure depth-averaged velocity • ENU or xyz coordinates can be used from http://www.sontek.com/

  14. SonTek Argonaut-XR – Specifications Velocity Features: Acoustic frequency:0.75, 1.5, or 3 MHz Beam angle: 25 degrees Ouput sample rate: 1 Hz Internal memory: 4 MB • Maximum: ± 6 m/s • Accuracy: ± 1% of measured velocity or± 0.5 cm/s

  15. SonTek Argonaut-XR – Multi-cell Option • Measurement up to 10 depth cells • 11th “dynamic” cell for changing water levels • Advantages • Very useful for QA – comparison of cell velocities and signal strength • Disadvantages • Smaller cells = greater velocity uncertainty • More data to log and store

  16. SonTek Argonaut-ADV • Bi-static, point meas. • SDI-12 capability • 4 MB recorder capacity • Velocity specs: • Range: ± 0.001 - 4.5 m/s • Accuracy: ± 1% of measured velocity or ± 0.1 cm/s • Probe configurations: Photo, sketches courtesy of SonTek

  17. TRDI ChannelMaster • 3 Frequencies: 300, 600, and 1,200 kHz • Personality modules: • SDI-12, • RS-232

  18. TRDI ChannelMaster – Specifications

  19. TRDI ChannelMaster – Specifications

  20. TRDI ChannelMaster – SDI-12 Multi-cell Output Output for each cell SDI-12 Output Temperature Pressure Level Velocity X-comp Velocity Y-comp Velocity Magnitude Backscatter • Velocity X-component • Velocity Y-component • Velocity Magnitude • Backscatter • Each cell has a unique SDI address • ONLY 9 cells can be output via SDI-12

  21. TRDI ChannelMaster – Upward-looking Stage Sensor • A pressure transducer is used with the acoustic transducer to improve accuracy • Sets a stage “window” to eliminate spikes • Used for: • Primary Stage • Redundant Stage • Effective flow depth (ice)

  22. OTT SLD • Models • 0.6, 1.0, or 2.0 MHz • Features • 2-D velocity measurements • ± 10 m/s maximum velocity • Up to 9 individual measurement cells • Acoustic stage measurement

  23. ADCPs are Sometimes used for Index Velocity Applications • SonTek/YSI • ADP • ADP-SL • \ • TRDI • Workhorse - Monitor or Sentinel • H-ADCP • Nortek & others?

  24. Questions

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