Abstract

A new three-dimensional flow velocity sensor which can measure upwelling was proposed. This sensor was composed of horizontal flow sensor and vertical flow sensor, and it can measured horizontal flow and tiny upwelling separately. The structure of horizontal flow and vertical flow velocity measuring device were analyzed and optimized based on static simulation, static calculation and an experiment. The results show that the sensor can measure both the small upwelling and the horizontal flow velocity in principle. Based on the root of energy loss, the amplifying structure was optimized. After optimization, the magnification factor was increased by 436.84%. According to experimental results, mechanical analysis of cross beams and static simulation, there was a good linear relationship between the flow resistance around the sphere and the output strain of the horizontal velocity measuring device, and it can be used to measure the horizontal flow velocity.

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