|Statement||Tong Deng ; supervised by P.A. Payne.|
|Contributions||Payne, P. A., DIAS.|
Study of acoustic transducer protrusion and recess effects on ultrasonic flowmeter measurement by numerical simulation Article in Flow Measurement and Instrumentation 22(5)– October. Today's most popular technology of ultrasonic flow measurement is based on the transit-time principle. In this paper, a numerical simulation technique applicable to the analysis of transit-time. Difference between Transit time and Doppler Ultrasonic Flow Meter Doppler and transit time are two very popular types of flow meter for non-invasive measurement of flow in full pipes. These technologies are often confused, because they are both ultrasonic, and both measure flow by using sensors clamped onto the outside of a pipe. This work focuses on the analysis, optimization, simulation, and the performance testing of one main component of such a measurement system - a new ultrasonic transit-time gas flowmeter for dynamically measuring the exhaust gas mass flow. This flowmeter, used in combination with fast gas analyzer benches, facilitates the optimization and.
A microcomputer-based ultrasonic gas flowmeter with transit-time method is presented. Modules of the flowmeter are designed systematically, including the acoustic path arrangement, ultrasound emission and reception module, transit-time measurement module, the software and so by: completed, the transit time (T ba) of an ultrasonic signal traveling against the flow is measured from Transducer B to Transducer A. When there is no flow the transit time is equal in both directions and the measured time of flight difference them (T ab T ba) is zero. Thus with flow the transit time of theFile Size: KB. Overview: Transit Time Ultrasonic Flowmeter: A pair (or pairs) of transducers, each having its own transmitter and receiver, are placed on the pipe wall, one (set) on the upstream and the other (set) on the downstream. The time for acoustic waves to travel from the upstream transducer to the downstream transducer t d is shorter than the time it reqires for the same waves to travel from the. For the Love of Physics - Walter Lewin - - Duration: Lectures by Walter Lewin. They will make you ♥ Physics. Recommended for you.
Ultrasonic flow meters are a non-contact means of measuring flow velocity. They are clamp-on devices that attach to the exterior of the pipe and enable measurement of corrosive liquids without damage to sensors. The two types of ultrasonic flow meters, Doppler and transit time, each function by way of two different technologies. Universal transit Time Ultrasonic Flowmeter. The SL is a universal transit-time flowmeter that has been designed using FPGA chip and low-voltage broadband pulse transmission. Learn More. Ultrasonic flowmeters use sound waves to determine the velocity of a fluid flowing in a pipe. At no flow conditions, the frequencies of an ultrasonic wave. Ultrasonic Flowmeter Study Overview Flow Research has completed a new market study on the worldwide ultrasonic flowmeter market. The study was conducted by Flow Research. One goal of the study was to determine the size of the ultrasonic flowmeter market in , and to . An ultrasonic transit-time flowmeter and a method for detecting a failure in an ultrasonic transit-time flowmeter are provided. The flowmeter includes a first ultrasonic transducer and a second ultrasonic transducer, wherein the transducers each are configured to transmit and receive signals, wherein the signals are transmitted between the transducers and measurements of transit-times of the Cited by: 3.