Design and Performance of Water Flow Velocity Calibration Facility |
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| Heming Hu, Yuan Liu, Zhigang Wang, Zeyu Guo, Yunlong Zhu |
- Abstract:
- Current meters are used for flow velocity measurement in river and ocean. Accurate measurements need accurate calibrations. There are more than ten tow tank facility in China providing water velocity calibration, and all of them are ~ 100 m long concrete tank with no clear uncertainty budget, especially there is not a thorough understanding of the water movements in the tow tank. We have built a small tow tank which is 8 m long, 1.2 m wide and 1.2 m high with a cart running speed of 0.01m/s ~ 1m/s. It was made of transparent glass and was possible to use optical instruments to investigate the background flow filed that might compromise calibration results. In order to test the performance of flow velocity calibration facility, Micro ADV produced by Sontek was employed to make a test, and the results showed that the calibrated results for ADV using flow velocity calibration facility proposed in this article agreed well with the manufacture’s declaration for accuracy and USGS’s conclusions. In addition, SNR (signal-noise ratio) of MicroADV was also analysed and related to the concentration of particles in water body. The performances verified that the flow velocity calibration facility was effective and could be used to conduct further analysis of current meters.
- Download:
- IMEKO-TC9-2019-068.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC9
- Event name:
- FLOMEKO 2019
- Title:
18th International Flow Measurement Conference 2019
- Place:
- Lisbon, PORTUGAL
- Time:
- 26 June 2019 - 28 June 2019