US 12,264,953 B2
System and method for measuring a flow of gas through a channel
Patrick Reissner, Herrliberg (CH)
Assigned to BELIMO HOLDING AG, Hinwil (CH)
Appl. No. 17/774,261
Filed by BELIMO HOLDING AG, Hinwil (CH)
PCT Filed Dec. 23, 2020, PCT No. PCT/EP2020/087760
§ 371(c)(1), (2) Date May 4, 2022,
PCT Pub. No. WO2021/130308, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 01696/19 (CH), filed on Dec. 23, 2019.
Prior Publication US 2022/0381595 A1, Dec. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01F 1/66 (2022.01); G01F 1/667 (2022.01)
CPC G01F 1/667 (2013.01) [G01F 1/662 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A flow measurement system comprising an ultrasonic flowmeter for measuring a flow of gas through a channel, the ultrasonic flowmeter comprising at least two ultrasonic transducers arranged at a distance from each other in a flow direction, when the ultrasonic flowmeter is fixed to the channel, and configured to emit an ultrasonic pulse into the channel and to receive an ultrasonic pulse in the channel, and a processor connected to the at least two ultrasonic transducers,
wherein the processor is configured to determine and store transit times of ultrasonic pulses propagating in and against the flow direction along at least one path in the channel, and to determine the flow of gas using the transit times,
wherein the flow measurement system further comprises the channel, the ultrasonic flowmeter is fixed to the channel, and a damper system has a damper blade arranged in the channel downstream of the ultrasonic flowmeter, and
wherein a plurality of paths, for measuring the transit times of ultrasonic pulses propagating in and against the flow direction, are implemented using a plurality of direct paths, a plurality of reflection paths, or a combination of one or more direct paths and one or more reflection paths.