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Sensors 2008, 8(10), 6747-6760; doi:10.3390/s8106747

Optimization of Single-Sensor Two-State Hot-Wire Anemometer Transmission Bandwidth

Strata Mechanics Research Institute Polish Academy of Sciences / Reymonta 27, 30-59 Kraków, Poland
Received: 1 September 2008 / Revised: 10 October 2008 / Accepted: 24 October 2008 / Published: 28 October 2008
(This article belongs to the Special Issue Sensor Algorithms)
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Hot-wire anemometric measurements of non-isothermal flows require the use of thermal compensation or correction circuitry. One possible solution is a two-state hot-wire anemometer that uses the cyclically changing heating level of a single sensor. The area in which flow velocity and fluid temperature can be measured is limited by the dimensions of the sensor’s active element. The system is designed to measure flows characterized by high velocity and temperature gradients, although its transmission bandwidth is very limited. In this study, we propose a method to optimize the two-state hot-wire anemometer transmission bandwidth. The method is based on the use of a specialized constanttemperature system together with variable dynamic parameters. It is also based on a suitable measurement cycle paradigm. Analysis of the method was undertaken using model testing. Our results reveal a possible significant broadening of the two-state hot-wire anemometer's transmission bandwidth. View Full-Text
Keywords: Hot–wire anemometry; temperature correction; frequency bandwidth; computer simulation; optimization Hot–wire anemometry; temperature correction; frequency bandwidth; computer simulation; optimization

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Ligęza, P. Optimization of Single-Sensor Two-State Hot-Wire Anemometer Transmission Bandwidth. Sensors 2008, 8, 6747-6760.

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