Ultrasonic Flow Meter Working Principle Ppt

Ultrasonic flow meters have many applications from process flow to custody flow.

Ultrasonic flow meter working principle ppt.

In the first condition the frequencies of ultrasonic waves are transmitted into a pipe its indications from the fluid are similar. The ultrasonic signals are generated by piezo electric crystals applying a voltage. Conversely the piezo electric crystal creates a. This time difference is a measure for the average velocity of the fluid along the path of the ultrasonic beam.

In my previous video https youtu be 8llrbvlydbo i told the working principle of variable area flow meter and in todays video i want to tell about the meas. An emitter sends ultrasonic waves at frequency f1 approx. Inside the ultrasonic flow meter pairs of sensors are fitted across the tube in opposite to each other. The working principle of ultrasonic flow meter is it uses sound waves to resolve the velocity of a liquid within a pipe.

Simultaneously the transit time of these signals are measured. Temporary flow measurements can be made using portable ultrasonic flowmeters with clamp on transducers. The canoe moving with the flow needs much less time to reach the opposite bank. Each sensor alternately can transmit and receive ultrasonic signals.

Principle doppler flow meters operate similarly to the radar speed traps used on the road. Some ultrasonic flowmeters use clamp on transducers that can be mounted external to the pipe and do not have any wetted parts. Ultrasonic flow meters operate using the transit time differential method. The transit time differential measurement is based on a simple physical fact.

Ultrasonic flowmeters do not obstruct flow so they can be applied to sanitary corrosive and abrasive liquids. The ultrasonic waves strike particles moving through the sound field at velocity vp. Ultrasonic flow meters measure the difference of the transit time of ultrasonic pulses propagating in a flowing fluid. Imagine two canoes crossing a river on the same diagonal line one with the flow and the other against the flow.

1 5 mhz at angle a into the flowing product. There are two conditions in the pipe like no flow and flowing.