Role of Wheatstone Bridge in Velocity Measurements with Tension Thread Flow Meter
Keywords:Flowmeter, Wheatstone Bridge, Strain Gauge;
This paper is concerned with the role of a Wheatstone bridge in velocity measurements with Tension Thread Flow Meter. The history of the Wheatstone bridge and the concept are reviewed in brief, and the role in the Tension Thread Flow Meter has been discussed. By using a prototype flow meter, how the system of structural, mechanical, and electrical components works harmoniously has been demonstrated. Several novel models of the present flowmeter have been proposed. It is realized that the Tension Thread Flow Meter possesses almost limitless potential to measure the instantaneous velocities ranging from nanometer/s to sound speed in air(gas) and water(liquid), together with the oscillating, boundary layer, channel and pipe flow. New development of the nanometer scale model for measuring the velocity in micro-fluid, and the application of Tension Thread Flow Meter to measure supersonic flow velocity are attractive research topics left for the future.
Christie, H.S. (1833) The Bakerian Lecture: Experimental determination of the laws of magnetic-electric induction in different masses of the same metal, and of its intensity in different metals. Philosophical Transactions of the Royal Society of London, 123, 95-142. https://doi.org/10.1098/rstl.1833.0011
Fleming, J.A. (1901) A Handbook for the Electrical Laboratory and Testing Room. Vol.1, London, pp.376
Jenkin, F. (1913) Reports of the B.A. Committee, Cambridge University Press, Cambridge.
Nakagawa, T. (1983) On characteristics of the water particle velocity in plunging breaker. J. Fluid Mech. 126, 251-268. https://doi.org/10.1017/S0022112083000142
Nakagawa, A., Nakagawa, T.R.M. (2020) On drag of circular cylinder suspended in uniform viscous flow. To Physics Journal (to appear).
Ohoya, Y., Karasudani, T. (2010) A shrouded wind turbine generating high output power with wind-lens technology. Energies 3, 634-649. https://doi.org/10.3390/en3040634
Poggendorff, J.C. (1870) Biographish-Literarishes Hand Wӧrter Buch der exakten Naturwissenschaften. Annalen der Physik 139, 510-546.
Sharp, B.B. (1964) Flow measurement with a suspension wire. Proc. ASCE HY2, 90, 37-53.
Sleath J.F.A. (1969) A device for velocity measurement in oscillatory boundary layers in water. J. Phys. E.: Sci. Instrum. 2, 446-448. https://doi.org/10.1088/0022-3735/2/5/425
Wheatstone, C. (1843) The Bakerian Lecture: An account of several new instruments and processes for determining the constants of Voltaic circuit. Philosophical Transactions of the Royal Society of London 133, 303-327. https://doi.org/10.1098/rstl.1843.0014
How to Cite
Copyright (c) 2020 Ai Nakagawa, Takeo R. M. Nakagawa
This work is licensed under a Creative Commons Attribution 4.0 International License.