低速热风速仪具有精确的数字控制温度补偿功能

IF 5.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Measurement Pub Date : 2024-11-17 DOI:10.1016/j.measurement.2024.116260

Zbigniew Popiolek, Maria Hurnik

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引用次数: 0

摘要

空气温度变化是使用热风速仪进行速度测量的一个重要不确定因素，因此，此类风速仪需要进行热补偿。低速热风速仪（LVTA）可用于测量空气温度变化很大的室内的风速。本文介绍了一种新型数字控制风速计电桥电路及其在 LVTA 中的应用。该电路可根据空气温度，以数字方式精确改变速度传感器的电阻和温度。考虑到速度传感器电阻的变化以及温度对空气导热性和粘度的影响，分析了从传感器到空气的热传导。在此分析基础上，开发了 LVTA 温度补偿方法。我们提出了一种控制速度传感器温度的方法，从而使 LVTA 的输出电压不受空气温度变化的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Low velocity thermal anemometer with precise, digitally controlled temperature compensation

Air temperature changes are an important source of uncertainty in velocity measurement using thermal anemometers, therefore, such anemometers require thermal compensation. Low velocity thermo-anemometers (LVTAs) are used for measuring air velocity in rooms where the air temperature can vary considerably. In this paper, we present a novel circuit of digitally controlled anemometer bridge and its application in the LVTAs. This circuit allows for precise digital change of the resistance and temperature of the velocity sensor depending on the air temperature. The heat transfer from the sensor to the air is analyzed considering the changes in the resistance of the velocity sensor and the impact of temperature on the air thermal conductivity and viscosity. Based on this analysis, the LVTA temperature compensation method is developed. We propose a method to control the temperature of the velocity sensor so that the output voltage of the LVTA is independent of changes in air temperature.

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来源期刊

Measurement 工程技术-工程：综合

CiteScore

10.20

自引率

12.50%

发文量

1589

审稿时长

12.1 months

期刊介绍： Contributions are invited on novel achievements in all fields of measurement and instrumentation science and technology. Authors are encouraged to submit novel material, whose ultimate goal is an advancement in the state of the art of: measurement and metrology fundamentals, sensors, measurement instruments, measurement and estimation techniques, measurement data processing and fusion algorithms, evaluation procedures and methodologies for plants and industrial processes, performance analysis of systems, processes and algorithms, mathematical models for measurement-oriented purposes, distributed measurement systems in a connected world.