US 12,228,436 B2
Signal processing
Trevor Forster, Sherborne (GB); and Jeffrey Evemy, Sherborne (GB)
Assigned to Titan Enterprises Ltd, Sherborne (GB)
Appl. No. 17/616,662
Filed by Titan Enterprises Ltd, Sherborne (GB)
PCT Filed Jun. 5, 2020, PCT No. PCT/EP2020/065691
§ 371(c)(1), (2) Date Dec. 5, 2021,
PCT Pub. No. WO2020/245401, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 1908158 (GB), filed on Jun. 7, 2019.
Prior Publication US 2022/0236090 A1, Jul. 28, 2022
Int. Cl. G01F 1/667 (2022.01); G01F 1/66 (2022.01)
CPC G01F 1/667 (2013.01) [G01F 1/662 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for determining a flow rate, Φt, of a fluid in a conduit (105), the method comprising:
providing a first ultrasonic transit time signal (115, 204, 314) under fluid flow, generated using a first transducer (110) in a direction towards a second transducer (120);
providing a second ultrasonic transit time signal (125, 206, 316) under fluid flow, generated using the second transducer (120) in a direction towards the first transducer (110), the first and second transducers (110, 120) being spatially separated from one another along a length of the conduit (105);
providing a third ultrasonic transit time signal (200, 310) under zero fluid flow, generated using the first or second transducer (110, 120) in a direction towards the second or first transducer (120, 110) respectively;
generating respective measures of amplitude and phase of the first (115, 204, 314), second (125, 206, 316) and third signals (200, 310) at a selected time to provide respective first, U (414), second, D (416) and third, Z (410), flow vectors;
calculating a measure of the difference in the values of amplitude and phase of the first signal (115, 204, 314) and second signal (125, 206, 316) at the selected time using the first and second flow vectors (414, 416) to provide a difference vector, A (418);
generating a measure for a component, my, of an interference vector, M (444), representing a conduit-borne component signal (150) of the first and second signals (115, 125) using the first and second flow vectors (414, 416) and the difference vector, A (418); and
generating a measure for the flow rate, Φt, of the fluid using the component, my, of the interference vector, M (444), the third flow vector, Z (410), and the sum, Σ (470), of the first and second vectors (414, 416).