APPARATUS AND METHOD FOR MEASURING AIR FLOW

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United States of America Patent

APP PUB NO 20190331520A1
SERIAL NO

16349897

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An apparatus and method for measuring air flow in a duct, e.g. in a ventilation duct, includes a sensor fittable into connection with the duct, the sensor including an ultrasound transmitter and at least two ultrasound receivers, and a control unit to which the ultrasound transmitter and ultrasound receivers are connectable. The control unit is adapted to measure, during the measuring of air flow, the phase difference of an ultrasound signal received at the same moment in time by at least two ultrasound receivers fitted into connection with the duct and, based on the measured phase difference, to determine the flow velocity and/or flow direction of the air. The apparatus is adapted to perform a calibration of the apparatus by transmitting with an ultrasound transmitter at least one calibration signal and by receiving the calibration signal with at least two ultrasound receivers. The apparatus is further adapted to analyze the received calibration signal and based on the analysis to select the parameters to be used in measuring to be such that at least one analysis result of the calibration signal meets predetermined criteria with the parameters.

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Patent Owner(s)

Patent OwnerAddress
FLÄKTGROUP SWEDEN AB551 84 JÖNKÖPING

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
HOKKANEN, Jari Akaa, FI 4 0
LAGERSTAM, Timo Espoo, FI 1 0
MIKKONEN, Jari Nokia, FI 2 0
SEPPÄLÄINEN, Erkki Kauniainen, FI 1 0
SILLANPÄÄ, Teuvo Helsinki, FI 5 19

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