A novel soft intelligent calibrator for low-velocity hot bulb anemometers

Zhang, Hongsheng; Li, Yunze; Zhong, Mingliang; Li, Miao; Guo, Wei; Liu, Yang

doi:10.1109/aim.2015.7222771

Cited by 1 publication

(2 citation statements)

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“…The former is called volume flow and the latter is called mass flow. Mass flow sensors, which are mostly used for accurate measurement because of its insensitivity to some parameters such as temperature and pressure, can be divided into indirect and direct ones according to measurement methods [1]. Common direct flow sensors include thermal, Coriolis, and impulse mass flow sensors [2], within which the mostly used is the thermal mass flow sensor which has the benefit of large range, high accuracy, and high reliability.…”

Section: Introductionmentioning

confidence: 99%

“…The thermal mass flow sensor measures the mass flow by detecting the transfer or dissipation of heat when the air is heated. Based on the heat transfer principle, the flow rate is measured by detecting the direct heat exchange relationship between the air in the pipeline and the flow sensor [1]. In 2016 [3], C. Wu et al designed a MEMS thermal flow sensors with the dumbbell type, aiming at measuring liquid flow whose rate is down to 0.05 µl/min, and the sensor turned…”

Section: Introductionmentioning

confidence: 99%

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Design and Experiments for a Kind of Capacitive Type Sensor Measuring Air Flow and Pressure Differential

Zhang

Zhou

et al. 2019

IEEE Access

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A kind of capacitive type air flow sensor is designed and fabricated for respiratory flow measurement. Major sensitive elements of the sensor are two parallel placed capacitance plates which are perpendicularly fixed on the sidewall of the air channel. The flow and pressure differential of air can be calculated by measuring the change of the micro capacitance, which is initiated by air pressure. The Bernoulli equation and the continuous equation of the fluid are used for theoretical analysis. The mechanical analysis and FEM (finite element method) is used to make the optimum design for the sensor. Then, the micro capacitance measuring circuit using the so called peak detection method is fabricated and corresponding A/D convert digital circuit are also made. Experimental result indicates the capacitance measuring circuit has little error. The accuracy, sensitivity, and resolution of the circuit reach 0.2% FS, 1.4089 V/pF, 0.003 pF respectively, which indicates this kind of system is feasible in practical applications. INDEX TERMS Capacitive type, pressure differential, air flow sensor, optimum design. FENGPEI YU received the B.S. degree from Beihang University, in 2017. His current research interests include signal acquisition and processing.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%