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1. (WO2014202084) A SYSTEM FOR IDENTIFYING A SENSOR AND MEASURING FLOW IN A FLOW DUCT

Pub. No.:    WO/2014/202084    International Application No.:    PCT/DK2014/050165
Publication Date: Thu Dec 25 00:59:59 CET 2014 International Filing Date: Sat Jun 14 01:59:59 CEST 2014
IPC: G01F 1/66
Applicants: AGENA A/S
Inventors: HANSEN, Henning Max
SCHMIDT-HANSEN, Hans
Title: A SYSTEM FOR IDENTIFYING A SENSOR AND MEASURING FLOW IN A FLOW DUCT
Abstract:
The present invention relates to a system or a method for measuring flow of fluid or gas, which system comprises a flow duct, which flow duct comprises at least two transducers, which transducers generate at least one beam of ultrasound in the flow duct. The object of the pending application is to place ultrasound transducers in a fixed positions in a duct for flowing air where the electronic device for analyzing signal from the transducers is performed in a handheld device. The object can be achieved by the transducers fixed in relation to the duct, which transmitter circuit is permanently connected to the transducers which receiver circuit is placed in a handheld device, which transmitter circuit comprises calibrations data representing the actual placement of the transducers in relation to the actual duct, which calibration data is communicated by every connection to the receiver circuit. Hereby can be achieved that transducers can be permanently placed in ventilation ducts in buildings, where placement of ultrasound transducers for measurement and for calibration of measurement of an air stream is nearly impossible.