公开(公告)号：US20170167904A1

公开(公告)日：2017-06-15

申请号：US14964172

申请日：2015-12-09

Applicant: Texas Instruments Incorporated

Inventor： AMARDEEP SATHYANARAYANA ,  ANAND DABAK ,  DAVID PATRICK MAGEE

IPC: G01F1/66

CPC classification number: G01F1/66 ,  G01F1/662 ,  G01F1/667

Abstract: A method of ultrasound flow metering includes applying a first and second pulse train to an ultrasound transducer pair (T1, T2) positioned for coupling ultrasonic waves therebetween. Responsive to the first pulse train applied to T1, T1 transmits an ultrasonic wave received as received ultrasonic wave (R12) by T2 after propagating through fluid in a pipe. Responsive to the second pulse train applied to T2, T2 transmits an ultrasonic wave received as received ultrasonic wave by (R21) T1 after propagating through the fluid. During the pulse trains, R12 and R21 build up in amplitude to provide excitation portions. The pulse trains are terminated, so that R12 and R21 decay as a damped free oscillation. Windowing is applied to R12 and R21 to generate windowed portions. A signal delay between t12 and t21 (ΔTOF) is calculated using only windowed portions, and a fluid flow is calculated from the ΔTOF.

公开(公告)号：US20210018350A1

公开(公告)日：2021-01-21

申请号：US17064671

申请日：2020-10-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： AMARDEEP SATHYANARAYANA ,  ANAND G. DABAK ,  DAVID PATRICK MAGEE

IPC: G01F1/66

Abstract: In an embodiment, a system for measuring material flow in a pipe is disclosed. A first transducer is operable to transmit a first signal having a first frequency at a first time and receive a second signal at a second time, and a second transducer spaced apart from the first transducer and is operable to receive the first signal and transmit the second signal having the first frequency. A signal processing circuit communicatively coupled to the first transducer and the second transducer, the signal processing circuit is operable to determine a first envelope of the first signal and a second envelope of the second signal and calculate a flow rate based on the first envelope of the first signal and the second envelope of the second signal.

公开(公告)号：US20160334250A1

公开(公告)日：2016-11-17

申请号：US14866779

申请日：2015-09-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： AMARDEEP SATHYANARAYANA ,  ANAND G. DABAK ,  DAVID PATRICK MAGEE

IPC: G01F1/66

Abstract: A method of calculating a time difference is disclosed. The method includes receiving a first signal, determining a first envelope of the first signal, and determining a first time the first envelope crosses a threshold. The method further includes receiving a second signal, determining a second envelope of the second signal, and determining a second time the second envelope crosses the threshold. The time difference is calculated between the first and second times.

Abstract translation: 公开了一种计算时差的方法。 该方法包括：接收第一信号，确定第一信号的第一包络，以及确定第一包络线跨越阈值的第一时间。 所述方法还包括接收第二信号，确定所述第二信号的第二包络，以及确定所述第二包络通过所述阈值的第二时间。 时间差在第一次和第二次之间计算。