A wind speed measuring device and method

By using a platinum-rhodium alloy hot wire coated with an aluminum oxide layer in a high-temperature environment, combined with a heater and a temperature sensor, a three-dimensional flow field is constructed, which solves the problems of traditional hot wire anemometers being easily contaminated and having insufficient measurement accuracy in high-temperature environments, and realizes high-precision wind speed measurement and real-time monitoring of workpiece temperature uniformity.

CN122283175APending Publication Date: 2026-06-26BEIJING RESEARCH INSTITUTE OF MECHANICAL & ELECTRICAL TECHNOLOGY CO LTD CAM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING RESEARCH INSTITUTE OF MECHANICAL & ELECTRICAL TECHNOLOGY CO LTD CAM
Filing Date
2026-03-17
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In existing technologies, thermocouple point temperature measurement and furnace wall temperature monitoring methods have problems such as temperature-flow velocity coupling blind zone, insufficient spatial resolution, response lag, lack of flow field uniformity evaluation methods, and traditional hot-wire anemometers cannot be used in high-temperature environments and are easily contaminated by oil and oxide scale particles, and cannot distinguish the effects of wind speed changes and gas temperature changes.

Method used

A platinum-rhodium alloy hot wire with an aluminum oxide layer coated on its surface is used. Combined with a heater and a temperature sensor, the superheat of the hot wire is dynamically adjusted to maintain a constant temperature, a three-dimensional flow field is constructed, and high-precision wind speed measurement is achieved using a Wheatstone bridge and a PID controller.

Benefits of technology

It achieves high-frequency response and low-interference wind speed measurement in high-temperature environments, improves measurement accuracy, and can monitor wind speed non-uniformity coefficient and turbulence intensity in real time, predict workpiece temperature uniformity, and meet the quality control requirements of high-end aerospace aluminum alloys.

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Abstract

A wind speed measuring device and method includes: a hot wire connected in a Wheatstone bridge, used to calculate wind speed by measuring the heat loss of the hot wire in the airflow; a temperature sensor positioned near the hot wire to detect the airflow temperature Tg; a heater electrically connected to the hot wire to increase the current in the hot wire, heating it to a predetermined temperature Tw; and a communicative connection between the heater and the temperature sensor, which adjusts the hot wire temperature Tw according to the airflow temperature Tg to maintain a constant superheat ΔT, where ΔT = Tw - Tg. By placing the temperature sensor near the hot wire, when the temperature sensor detects a change in the airflow temperature near the hot wire, the heater adjusts the amount of heat supplied to the hot wire to keep the superheat ΔT constant. This reduces the influence of temperature on wind speed detection and improves the accuracy of wind speed measurement.
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